Merge pull request #277 from openpgp-keychain/new-api

New api

86 files changed, 2733 insertions, 2571 deletions

diff --git a/OpenPGP-Keychain-API/example-app/build.gradle b/OpenPGP-Keychain-API/example-app/build.gradle
index 99a09f094..1f8854431 100644
--- a/OpenPGP-Keychain-API/example-app/build.gradle
+++ b/OpenPGP-Keychain-API/example-app/build.gradle
@@ -1,10 +1,11 @@
+// please leave this here, so this library builds on its own
 buildscript {
     repositories {
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.8.0'
+        classpath 'com.android.tools.build:gradle:0.8.3'
     }
 }
 
@@ -20,7 +21,7 @@ android {
     buildToolsVersion "19.0.1"
 
     defaultConfig {
-        minSdkVersion 8
+        minSdkVersion 9
         targetSdkVersion 19
     }
 
diff --git a/OpenPGP-Keychain-API/example-app/src/main/AndroidManifest.xml b/OpenPGP-Keychain-API/example-app/src/main/AndroidManifest.xml
index 8b8c43776..42465cef8 100644
--- a/OpenPGP-Keychain-API/example-app/src/main/AndroidManifest.xml
+++ b/OpenPGP-Keychain-API/example-app/src/main/AndroidManifest.xml
@@ -2,19 +2,19 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.sufficientlysecure.keychain.demo"
     android:versionCode="2"
-    android:versionName="1.1" >
+    android:versionName="1.1">
 
     <uses-sdk
-        android:minSdkVersion="8"
+        android:minSdkVersion="9"
         android:targetSdkVersion="19" />
 
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
-        android:label="OpenPGP Keychain API Demo" >
+        android:label="OpenPGP Keychain API Demo">
         <activity
             android:name=".BaseActivity"
-            android:label="OpenPGP Keychain API Demo" >
+            android:label="OpenPGP Keychain API Demo">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
@@ -26,9 +26,8 @@
             android:label="OpenPGP Provider"
             android:windowSoftInputMode="stateHidden" />
         <activity
-            android:name=".AidlDemoActivity2"
-            android:label="Aidl Demo (ACCESS_KEYS permission)"
-            android:windowSoftInputMode="stateHidden" />
+            android:name=".IntentActivity"
+            android:label="Intents" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java
deleted file mode 100644
index b6e211955..000000000
--- a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/AidlDemoActivity2.java
+++ /dev/null
@@ -1,168 +0,0 @@
-///*
-// * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
-// *
-// * Licensed under the Apache License, Version 2.0 (the "License");
-// * you may not use this file except in compliance with the License.
-// * You may obtain a copy of the License at
-// *
-// *      http://www.apache.org/licenses/LICENSE-2.0
-// *
-// * Unless required by applicable law or agreed to in writing, software
-// * distributed under the License is distributed on an "AS IS" BASIS,
-// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// * See the License for the specific language governing permissions and
-// * limitations under the License.
-// */
-//
-//package org.sufficientlysecure.keychain.demo;
-//
-//import java.util.ArrayList;
-//import java.util.List;
-//
-//import org.sufficientlysecure.keychain.demo.R;
-//import org.sufficientlysecure.keychain.integration.KeychainData;
-//import org.sufficientlysecure.keychain.integration.KeychainIntentHelper;
-//import org.sufficientlysecure.keychain.service.IKeychainKeyService;
-//import org.sufficientlysecure.keychain.service.handler.IKeychainGetKeyringsHandler;
-//
-//import android.annotation.SuppressLint;
-//import android.app.Activity;
-//import android.app.AlertDialog;
-//import android.content.ComponentName;
-//import android.content.Context;
-//import android.content.Intent;
-//import android.content.ServiceConnection;
-//import android.os.Bundle;
-//import android.os.IBinder;
-//import android.os.RemoteException;
-//import android.util.Base64;
-//import android.view.View;
-//import android.widget.TextView;
-//
-//public class AidlDemoActivity2 extends Activity {
-//    Activity mActivity;
-//
-//    TextView mKeyringsTextView;
-//
-//    KeychainIntentHelper mKeychainIntentHelper;
-//    KeychainData mKeychainData;
-//
-//    byte[] keysBytes;
-//    ArrayList<String> keysStrings;
-//
-//    private IKeychainKeyService service = null;
-//    private ServiceConnection svcConn = new ServiceConnection() {
-//        public void onServiceConnected(ComponentName className, IBinder binder) {
-//            service = IKeychainKeyService.Stub.asInterface(binder);
-//        }
-//
-//        public void onServiceDisconnected(ComponentName className) {
-//            service = null;
-//        }
-//    };
-//
-//    @Override
-//    public void onCreate(Bundle icicle) {
-//        super.onCreate(icicle);
-//        setContentView(R.layout.aidl_demo2);
-//
-//        mActivity = this;
-//
-//        mKeyringsTextView = (TextView) findViewById(R.id.aidl_demo_keyrings);
-//
-//        mKeychainIntentHelper = new KeychainIntentHelper(mActivity);
-//        mKeychainData = new KeychainData();
-//
-//        bindService(new Intent(IKeychainKeyService.class.getName()), svcConn,
-//                Context.BIND_AUTO_CREATE);
-//    }
-//
-//    public void getKeyringsStringsOnClick(View view) {
-//        try {
-//            service.getPublicKeyRings(mKeychainData.getPublicKeys(), true, getKeyringsHandler);
-//        } catch (RemoteException e) {
-//            exceptionImplementation(-1, e.toString());
-//        }
-//    }
-//
-//    public void getKeyringsBytesOnClick(View view) {
-//        try {
-//            service.getPublicKeyRings(mKeychainData.getPublicKeys(), false, getKeyringsHandler);
-//        } catch (RemoteException e) {
-//            exceptionImplementation(-1, e.toString());
-//        }
-//    }
-//
-//    @SuppressLint("NewApi")
-//    private void updateView() {
-//        if (keysBytes != null) {
-//            mKeyringsTextView.setText(Base64.encodeToString(keysBytes, Base64.DEFAULT));
-//        } else if (keysStrings != null) {
-//            mKeyringsTextView.setText("");
-//            for (String output : keysStrings) {
-//                mKeyringsTextView.append(output);
-//            }
-//        }
-//    }
-//
-//    @Override
-//    public void onDestroy() {
-//        super.onDestroy();
-//
-//        unbindService(svcConn);
-//    }
-//
-//    private void exceptionImplementation(int exceptionId, String error) {
-//        AlertDialog.Builder builder = new AlertDialog.Builder(this);
-//        builder.setTitle("Exception!").setMessage(error).setPositiveButton("OK", null).show();
-//    }
-//
-//    private final IKeychainGetKeyringsHandler.Stub getKeyringsHandler = new IKeychainGetKeyringsHandler.Stub() {
-//
-//        @Override
-//        public void onException(final int exceptionId, final String message) throws RemoteException {
-//            runOnUiThread(new Runnable() {
-//                public void run() {
-//                    exceptionImplementation(exceptionId, message);
-//                }
-//            });
-//        }
-//
-//        @Override
-//        public void onSuccess(final byte[] outputBytes, final List<String> outputStrings)
-//                throws RemoteException {
-//            runOnUiThread(new Runnable() {
-//                public void run() {
-//                    if (outputBytes != null) {
-//                        keysBytes = outputBytes;
-//                        keysStrings = null;
-//                    } else if (outputStrings != null) {
-//                        keysBytes = null;
-//                        keysStrings = (ArrayList<String>) outputStrings;
-//                    }
-//                    updateView();
-//                }
-//            });
-//
-//        }
-//
-//    };
-//
-//    public void selectEncryptionKeysOnClick(View view) {
-//        mKeychainIntentHelper.selectPublicKeys("user@example.com");
-//    }
-//
-//    @Override
-//    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-//        // this updates the mKeychainData object to the result of the methods
-//        boolean result = mKeychainIntentHelper.onActivityResult(requestCode, resultCode, data,
-//                mKeychainData);
-//        if (result) {
-//            updateView();
-//        }
-//
-//        // continue with other activity results
-//        super.onActivityResult(requestCode, resultCode, data);
-//    }
-//
-//}
diff --git a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java
index 5b286f208..dd642d879 100644
--- a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java
+++ b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/BaseActivity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,6 @@
 
 package org.sufficientlysecure.keychain.demo;
 
-import org.sufficientlysecure.keychain.demo.R;
-
-import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.preference.Preference;
@@ -27,13 +24,8 @@ import android.preference.PreferenceActivity;
 import android.widget.Toast;
 
 public class BaseActivity extends PreferenceActivity {
-    private Activity mActivity;
-
     private Preference mIntentDemo;
-    private Preference mContentProviderDemo;
     private Preference mCryptoProvider;
-    private Preference mAidlDemo;
-    private Preference mAidlDemo2;
 
     /**
      * Called when the activity is first created.
@@ -42,23 +34,17 @@ public class BaseActivity extends PreferenceActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        mActivity = this;
-
         // load preferences from xml
         addPreferencesFromResource(R.xml.base_preference);
 
         // find preferences
         mIntentDemo = (Preference) findPreference("intent_demo");
-        mContentProviderDemo = (Preference) findPreference("content_provider_demo");
         mCryptoProvider = (Preference) findPreference("openpgp_provider_demo");
-        mAidlDemo = (Preference) findPreference("aidl_demo");
-        mAidlDemo2 = (Preference) findPreference("aidl_demo2");
 
         mIntentDemo.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             @Override
             public boolean onPreferenceClick(Preference preference) {
-                // startActivity(new Intent(mActivity, IntentDemoActivity.class));
-                Toast.makeText(BaseActivity.this, "Not implemented!", Toast.LENGTH_LONG).show();
+                startActivity(new Intent(BaseActivity.this, IntentActivity.class));
 
                 return false;
             }
@@ -67,21 +53,11 @@ public class BaseActivity extends PreferenceActivity {
         mCryptoProvider.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             @Override
             public boolean onPreferenceClick(Preference preference) {
-                startActivity(new Intent(mActivity, OpenPgpProviderActivity.class));
+                startActivity(new Intent(BaseActivity.this, OpenPgpProviderActivity.class));
 
                 return false;
             }
         });
-
-        // mAidlDemo2.setOnPreferenceClickListener(new OnPreferenceClickListener() {
-        // @Override
-        // public boolean onPreferenceClick(Preference preference) {
-        // startActivity(new Intent(mActivity, AidlDemoActivity2.class));
-        //
-        // return false;
-        // }
-        // });
-
     }
 
 }
diff --git a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/IntentActivity.java b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/IntentActivity.java
new file mode 100644
index 000000000..ad1b55df0
--- /dev/null
+++ b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/IntentActivity.java
@@ -0,0 +1,584 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.demo;
+
+import android.content.ActivityNotFoundException;
+import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceActivity;
+import android.provider.MediaStore;
+import android.util.Log;
+import android.widget.Toast;
+
+import org.sufficientlysecure.keychain.api.OpenKeychainIntents;
+
+import java.io.UnsupportedEncodingException;
+
+public class IntentActivity extends PreferenceActivity {
+
+    private static final int SELECT_PHOTO = 100;
+
+    /**
+     * Called when the activity is first created.
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // load preferences from xml
+        addPreferencesFromResource(R.xml.intent_preference);
+
+        // find preferences
+        Preference encrypt = (Preference) findPreference("ENCRYPT");
+        Preference encryptUri = (Preference) findPreference("ENCRYPT_URI");
+        Preference decrypt = (Preference) findPreference("DECRYPT");
+        Preference import_key = (Preference) findPreference("IMPORT_KEY");
+        Preference import_key_from_keyserver = (Preference) findPreference("IMPORT_KEY_FROM_KEYSERVER");
+        Preference import_key_from_qr_code = (Preference) findPreference("IMPORT_KEY_FROM_QR_CODE");
+        Preference openpgp4fpr = (Preference) findPreference("openpgp4fpr");
+
+        // To prevent Android Studio from complaining...
+        assert encrypt != null;
+        assert encryptUri != null;
+        assert decrypt != null;
+        assert import_key != null;
+        assert import_key_from_keyserver != null;
+        assert import_key_from_qr_code != null;
+        assert openpgp4fpr != null;
+
+        encrypt.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(OpenKeychainIntents.ENCRYPT);
+                    intent.putExtra(OpenKeychainIntents.ENCRYPT_EXTRA_TEXT, "Hello world!");
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+        encryptUri.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
+                photoPickerIntent.setType("image/*");
+                startActivityForResult(photoPickerIntent, SELECT_PHOTO);
+
+                return false;
+            }
+        });
+
+        decrypt.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(OpenKeychainIntents.DECRYPT);
+                    intent.putExtra(OpenKeychainIntents.DECRYPT_EXTRA_TEXT, TEST_SIGNED_MESSAGE);
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+        import_key.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(OpenKeychainIntents.IMPORT_KEY);
+                    byte[] pubkey = null;
+                    try {
+                        pubkey = TEST_PUBKEY.getBytes("UTF-8");
+                    } catch (UnsupportedEncodingException e) {
+                        e.printStackTrace();
+                    }
+                    intent.putExtra(OpenKeychainIntents.IMPORT_KEY_EXTRA_KEY_BYTES, pubkey);
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+        import_key_from_keyserver.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(OpenKeychainIntents.IMPORT_KEY_FROM_KEYSERVER);
+                    intent.putExtra(OpenKeychainIntents.IMPORT_KEY_FROM_KEYSERVER_QUERY, "Richard Stallman");
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+        import_key_from_qr_code.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(OpenKeychainIntents.IMPORT_KEY_FROM_QR_CODE);
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+        openpgp4fpr.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                try {
+                    Intent intent = new Intent(Intent.ACTION_VIEW);
+                    intent.setData(Uri.parse("openpgp4fpr:73EE2314F65FA92EC2390D3A718C070100012282"));
+                    startActivity(intent);
+                } catch (ActivityNotFoundException e) {
+                    Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                }
+
+                return false;
+            }
+        });
+
+
+    }
+
+    protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
+        super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
+
+        switch (requestCode) {
+            case SELECT_PHOTO:
+                if (resultCode == RESULT_OK) {
+                    Uri selectedImage = imageReturnedIntent.getData();
+
+                    String[] filePathColumn = {MediaStore.Images.Media.DATA};
+
+                    Cursor cursor = getContentResolver().query(
+                            selectedImage, filePathColumn, null, null, null);
+                    cursor.moveToFirst();
+
+                    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
+                    String filePath = cursor.getString(columnIndex);
+                    cursor.close();
+
+                    // TODO: after fixing DECRYPT, we could use Uri selectedImage directly
+                    Log.d(Constants.TAG, "filePath: " + filePath);
+
+                    try {
+                        Intent intent = new Intent(OpenKeychainIntents.ENCRYPT);
+                        Uri dataUri = Uri.parse("file://" + filePath);
+                        Log.d(Constants.TAG, "Uri: " + dataUri);
+                        intent.setData(dataUri);
+                        startActivity(intent);
+                    } catch (ActivityNotFoundException e) {
+                        Toast.makeText(IntentActivity.this, "Activity not found!", Toast.LENGTH_LONG).show();
+                    }
+                }
+        }
+    }
+
+    private static final String TEST_SIGNED_MESSAGE = "-----BEGIN PGP SIGNED MESSAGE-----\n" +
+            "Hash: SHA1\n" +
+            "\n" +
+            "Hello world!\n" +
+            "-----BEGIN PGP SIGNATURE-----\n" +
+            "Version: GnuPG v1.4.12 (GNU/Linux)\n" +
+            "Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/\n" +
+            "\n" +
+            "iQEcBAEBAgAGBQJS/7vTAAoJEHGMBwEAASKCkGYH/2jBLzamVyqd61jrjMQM0jUv\n" +
+            "MkDcPUxPrYH3wZOO0HcgdBQEo66GZEC2ATmo8izJUMk35Q5jas99k0ac9pXhPUPE\n" +
+            "5qDXdQS10S07R6J0SeDYFWDSyrSiDTCZpFkVu3JGP/3S0SkMYXPzfYlh8Ciuxu7i\n" +
+            "FR5dmIiz3VQaBgTBSCBFEomNFM5ypynBJqKIzIty8v0NbV72Rtg6Xg76YqWQ/6MC\n" +
+            "/MlT3y3++HhfpEmLf5WLEXljbuZ4SfCybgYXG9gBzhJu3+gmBoSicdYTZDHSxBBR\n" +
+            "BwI+ueLbhgRz+gU+WJFE7xNw35xKtBp1C4PR0iKI8rZCSHLjsRVzor7iwDaR51M=\n" +
+            "=3Ydc\n" +
+            "-----END PGP SIGNATURE-----";
+
+    private static final String TEST_PUBKEY = "-----BEGIN PGP PUBLIC KEY BLOCK-----\n" +
+            "Version: GnuPG v1.4.12 (GNU/Linux)\n" +
+            "\n" +
+            "mQENBEuG/qABCACZeLHynGVXn7Ou6MKE2GzSTGPWGrA86uHwHPUbbTUR7tYTUWeA\n" +
+            "Ur+l+lR3GRTbcQY4ColGUcDcTVlW/cp9jhHnbbSIS0uJvW+4yu3I5eSIIoI09PLY\n" +
+            "KjT0U5l2z6t6daL7qWfZ1pQkCuCMe43eMLBPvyao1+zEd1zESbMz/bySZRlYMKAC\n" +
+            "aD9pGnFHS+EOU+lQXxfzCpKEQcHmPrrBFh2Gr2JFWWjZArKh7B1lQLekD2KS8aFb\n" +
+            "Lg1WGo5tK1sSk6MnMmqs1zNw1n15p5UDnJ7Qh8ecfMyDLy/ZyUjfFjy4BE0p+4mS\n" +
+            "J5iDU0pTYK3BpdfujY6NE+S2Ca2J6QoNRN8XABEBAAG0MURvbWluaWsgU2Now7xy\n" +
+            "bWFubiA8ZG9taW5pa0Bkb21pbmlrc2NodWVybWFubi5kZT6JAT8EEwECACkCGyMF\n" +
+            "CQlmAYAGCwkIBwMCBBUCCAMEFgIDAQIeAQIXgAUCS4b/ZQIZAQAKCRBxjAcBAAEi\n" +
+            "gjHWB/9w+D8DOxOGeUzNxfGn98C1nYVkt8zNcTnODBd8VsaPx1pKOXUu6IfqaTxa\n" +
+            "qS4hsAmgV9l0xLA2CkRndZAangsl3ZwURh8UiX/uqJRA9c9py7O+8GxpARtwtOPQ\n" +
+            "VxXx/O8vkXxFpYsFzpotN5XlGkLWWVySotKbTcSfaBifcS3oFT+d6VAZ/D68iTaH\n" +
+            "YBRfwaganevuqUsrJQiCOX11d6Lnr5cDzvmR2yagsLZPUi3CI02bVZYH99uNAr8b\n" +
+            "O7OkrgbcN7U5VlMuXdzj5fU43QpAzrT11JY9jmYsxbJ3t0Zgb5tnGXq9UBkPgGKC\n" +
+            "T01QW7aKHBN5YeDtOY1d0DQMNLkKiQEcBBMBAgAGBQJL/m2NAAoJENjTIPvvLEnw\n" +
+            "9TsIAIEV6UjXLSfxOggm7/0pG43P6OP1HvItUCg/wPfLexHGKJQAh2SuotUNNq7h\n" +
+            "i67PajHBgS/iZNrT868sDWGN5FT2toFOsY3YMTwv1GpsZGTSB7my+ej0Lq5OxCkD\n" +
+            "1rGsOLhetFzIqRuybmLRgAWxj9tg8ib2bkpI1S+67TRtrDkbKUdVrEvQp4rhItNl\n" +
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+            "4cGNSjg+ZRgS3BikUgVKJAL/A3qhyF25ATSLFT6IRgQQEQIABgUCUQq1+AAKCRAE\n" +
+            "tb81V3CDSkyLAJ9LEg8I/lyaUp0W6XUCfZ+yeFJk7QCggB2oBTyBin4VRDYg5aFW\n" +
+            "2vDbKHSJAhwEEwEIAAYFAlEMbTQACgkQrpk18w7U8BDCuxAAiDD0h9v8UksJVjiz\n" +
+            "RpAA6qiZyddjghzcO4GgAqxv3fdqBNZ5uYCtbYEeEHLWHmd/O2f98i4PRgHe6xlo\n" +
+            "gC+7TQAG/O4YVNtnntCFmx0G4z6/1nZc+IbfYHSmk0tszo6zIO0NOzek5N8t8GzD\n" +
+            "QknSixKh8z0hWmseUz0RJKagmxkbnDOLvfVAOIbJW3iKVauIeyxqE/5gNIWn+/vT\n" +
+            "p87MxSpMMrgWHjMHuyaxdN93t+ea7XZ+iWQCd9HQ7RhylATUPsoeiwjUm0O16jqX\n" +
+            "OGLFJM9PFKS4DIRMze4JRrdFlIxOQP4xjbu8VS4hGJK8Gi46QMhB8TLR3qOzpZyU\n" +
+            "S2f+Kjt4RoYa8iwbWbfB8jCSGf+lgQPsNDVEdaRJQPqClKqkfldlt32E9GULx9ln\n" +
+            "Ncyfb0CXt06Gt9dFXIP/tU0cgZm8KsmSEl11TofZ/UL/KLgIJjiw80ZqUSrFKARz\n" +
+            "6UfxQwkbIWMu5BXU5t/8P/SQawpSbXugnejQ9Q7wNZ593SgH8VdXrGS5zNagGaIj\n" +
+            "GJsj4LzCuYc2a12w1zuWeVIGCbJyoWzd6PYfIleHZo2ISRnAR6S24yTKPkMwiutT\n" +
+            "VthVNeE33Yek6YQZ5Xdmgfy/q98IdV12U+sA1LQOABoJF+goBNHh1AlfCAuLbgmo\n" +
+            "BYSjSGXQ7XjaiNUeexAV8f7TEhiIRgQTEQIABgUCUXqlbQAKCRArrjz22v+wABZn\n" +
+            "AKCs+Z19eY/NmrSzPQsZ7SlHBNremACeJehgL8VdZkPMiW3xUbEki2ji62u0MURv\n" +
+            "bWluaWsgU2Now7xybWFubiA8KzQ5MTcxNjU4MTQ1MkBjcnlwdG9jYWxsLm9yZz6J\n" +
+            "AR8EMAECAAkFAlD393UCHQAACgkQcYwHAQABIoJawQf/RpeNorZbtnIZmNz8y2Ko\n" +
+            "3xNKEGlf4XoFY7irtJo4ImO5Muftr+Y20rhIQYTf7tBNaFabj2nb223d7Apg84lR\n" +
+            "MGSUA9+5V+C0yjALA1SttqRW2evd4NX9/N5WNrf4z+S3C2QfD0mL41eUiIgLgJhc\n" +
+            "Hmll9wiZyJzr2t9GNkOk0iYJzkqDBhdxj2Zl3OcD3v6P6IUM+3RWzk5tFmt/YHvN\n" +
+            "aXPWgND/8OVAdd470p/aK10qZ9v51ZxWN1OT/HVZrNh5rLdfroeNjFKtS/pl1wMT\n" +
+            "ImtN03lhhyWR0a++Eowh6zEJKeDfg7C+2djqsB9C8nMDZbmQdNLFJNQRVSiK4i8E\n" +
+            "4YkBPgQTAQIAKAUCTp8R3QIbIwUJCWYBgAYLCQgHAwIGFQgCCQoLBBYCAwECHgEC\n" +
+            "F4AACgkQcYwHAQABIoI6KAf/THY5iMm+CH5dJOTAwuHUyuKduvSVFxq+1WX3rX21\n" +
+            "x670fhHx9WarvE+CsgreUzfBVZxq1cq2oB72KyFsa45utKt761x4QEOM01CRQO21\n" +
+            "hIgl+wed9CRgzO17OzZ/E/G47/P8pHxm8kXwictTWqZ4rlgfzOg7YcY5An05rFH2\n" +
+            "J+fxUVfdjZ2u75XDE6CAHV1hMvrRwatnJQ33S1/yRCdhT3qad7U7wrbtiu7Y4KNi\n" +
+            "gM4ur+kGqRSNWN6/4v7OHRgj0Pp6jbs2pXqccR9rAhlKhnatd6RKb1+LlYEyblSC\n" +
+            "76PIZm26h8qhY8UKrj9a2ydmWDY2uquxbRLvjrT8suZZebQvRG9taW5payBTY2jD\n" +
+            "vHJtYW5uIDxzY2h1ZXJtYW5uQGlici5jcy50dS1icy5kZT6JAT4EEwECACgFAlLq\n" +
+            "hOACGyMFCQlmAYAGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEHGMBwEAASKC\n" +
+            "nKcH/ik9LmnpEclsCDfzYqTEbVOSNZA30YcvwdlsHlzjRm+KjJC3D350147o5D60\n" +
+            "xq0UBUxKeXJPPMofeRgzTiAjTdv2ilJEZe8bMM5b7gcmp92q4tAY3OxcGNprIswc\n" +
+            "eb5hG4kY905WAy076iaQOD9z0Y+bXWQo0OHc07lc4+8ZLG9u+rGDjfF0x4UWgkAQ\n" +
+            "d8Thth4lTzdZR/kLLBCdlOyb9sAKqfbxbfATDQEceex7dZF/uJRCvFojHMtDbhxe\n" +
+            "xdfEjWbsJRQR0KKTHYS02zqhVu34elwuRSWf1OOR7ynh5nD5CCAAmVbi+x7y281i\n" +
+            "YYTchi/s71CSs81OtFtaBfVNSeq5AQ0ES4b+oAEIANr825Ns9mewUTHNfZ3/xK7R\n" +
+            "mp+nVLgOoyJDZF+Qum08RnFiECCiDTPlHIUuZt6jUu8vb/TKH5bdviFkC2MQPhm0\n" +
+            "/5sbbbqbV6wMnXfMd/RTPkIeeheEumY/5n4oYYGuVTZ+0MBouPY/wXfxp6HkqtuI\n" +
+            "qUZm8Bmy9AEScxiBURBu4MOr9/c9niLFlnpFLhEsSm17nS6/tdEJGdMRb3WNFn5+\n" +
+            "bE8w9e8RqPlye9SFZHsjmv9jCZaW5fZkcdDTcDClPVvIBtUl6y/kkh0RfIwdU+T5\n" +
+            "GRI8XekgI8WkvEqxTaQqn03C79zU3nhRuSgy8E492uaTmwpmAXC/m4Z6luTNPrEA\n" +
+            "EQEAAYkBJQQYAQIADwUCS4b+oAIbDAUJCWYBgAAKCRBxjAcBAAEignQvB/915fHh\n" +
+            "7di/yoyJfmufnj4fJ9Lt6OYyXvKetXpC+dLx7zH61KCeKosgWIN5HyY2Si1ZfGdO\n" +
+            "JQ1L0d9Y+TsRVslU34uY7DuYLs4yGNwFdI4r6Y+PHIAE0Cd3xxf8xFr8oiinPMvm\n" +
+            "SVDO2MbF0W/TnYwvyoN7Of0uAUdFY0sRupamPgNEz7dTZ+UoKgRFzfPh4zUb5Hav\n" +
+            "loqJCE/BEJ4wkxYTaJfFdJq+3WAZdd0f1OZLLDcCCvbZHNYBvpPauoVq3LD8MHXz\n" +
+            "hCRY9Rp2ZxX92PrFiSNpKheP30iZM8VInDfPGaApQU1y8R2uLL0I/7XWiFtpmR6e\n" +
+            "k3wUxv46o0y15asU\n" +
+            "=Bbew\n" +
+            "-----END PGP PUBLIC KEY BLOCK-----\n";
+
+}
diff --git a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java
index 4a96de5a1..d14703f2d 100644
--- a/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java
+++ b/OpenPGP-Keychain-API/example-app/src/main/java/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,181 +16,103 @@
 
 package org.sufficientlysecure.keychain.demo;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
-import org.openintents.openpgp.OpenPgpData;
-import org.openintents.openpgp.OpenPgpError;
-import org.openintents.openpgp.OpenPgpServiceConnection;
-import org.openintents.openpgp.OpenPgpSignatureResult;
-import org.openintents.openpgp.IOpenPgpCallback;
-import org.openintents.openpgp.IOpenPgpService;
-
 import android.app.Activity;
-import android.app.AlertDialog;
-import android.content.DialogInterface;
+import android.app.PendingIntent;
 import android.content.Intent;
-import android.content.pm.ResolveInfo;
-import android.graphics.drawable.Drawable;
+import android.content.IntentSender;
+import android.content.SharedPreferences;
 import android.os.Bundle;
-import android.os.RemoteException;
+import android.preference.PreferenceManager;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
+import android.widget.Button;
 import android.widget.EditText;
-import android.widget.ListAdapter;
-import android.widget.TextView;
 import android.widget.Toast;
 
-public class OpenPgpProviderActivity extends Activity {
-    Activity mActivity;
+import org.openintents.openpgp.OpenPgpError;
+import org.openintents.openpgp.util.OpenPgpApi;
+import org.openintents.openpgp.util.OpenPgpConstants;
+import org.openintents.openpgp.util.OpenPgpServiceConnection;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
 
+public class OpenPgpProviderActivity extends Activity {
     EditText mMessage;
     EditText mCiphertext;
     EditText mEncryptUserIds;
+    Button mSign;
+    Button mEncrypt;
+    Button mSignAndEncrypt;
+    Button mDecryptAndVerify;
+
+    OpenPgpServiceConnection mServiceConnection;
 
-    private OpenPgpServiceConnection mCryptoServiceConnection;
+    public static final int REQUEST_CODE_SIGN = 9910;
+    public static final int REQUEST_CODE_ENCRYPT = 9911;
+    public static final int REQUEST_CODE_SIGN_AND_ENCRYPT = 9912;
+    public static final int REQUEST_CODE_DECRYPT_AND_VERIFY = 9913;
 
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
-        setContentView(R.layout.crypto_provider_demo);
-
-        mActivity = this;
+        setContentView(R.layout.openpgp_provider);
 
         mMessage = (EditText) findViewById(R.id.crypto_provider_demo_message);
         mCiphertext = (EditText) findViewById(R.id.crypto_provider_demo_ciphertext);
         mEncryptUserIds = (EditText) findViewById(R.id.crypto_provider_demo_encrypt_user_id);
+        mSign = (Button) findViewById(R.id.crypto_provider_demo_sign);
+        mEncrypt = (Button) findViewById(R.id.crypto_provider_demo_encrypt);
+        mSignAndEncrypt = (Button) findViewById(R.id.crypto_provider_demo_sign_and_encrypt);
+        mDecryptAndVerify = (Button) findViewById(R.id.crypto_provider_demo_decrypt_and_verify);
 
-        selectCryptoProvider();
-    }
-
-    /**
-     * Callback from remote openpgp service
-     */
-    final IOpenPgpKeyIdsCallback.Stub getKeysEncryptCallback = new IOpenPgpKeyIdsCallback.Stub() {
-
-        @Override
-        public void onSuccess(final long[] keyIds) throws RemoteException {
-            Log.d(Constants.TAG, "getKeysEncryptCallback keyId " + keyIds[0]);
-            mActivity.runOnUiThread(new Runnable() {
-
-                @Override
-                public void run() {
-                    // encrypt after getting key ids
-                    String inputStr = mMessage.getText().toString();
-                    OpenPgpData input = new OpenPgpData(inputStr);
-
-                    Log.d(Constants.TAG, "getKeysEncryptCallback inputStr " + inputStr);
-
-                    try {
-                        mCryptoServiceConnection.getService().encrypt(input,
-                                new OpenPgpData(OpenPgpData.TYPE_STRING), keyIds, encryptCallback);
-                    } catch (RemoteException e) {
-                        Log.e(Constants.TAG, "CryptoProviderDemo", e);
-                    }
-                }
-            });
-        }
-
-        @Override
-        public void onError(OpenPgpError error) throws RemoteException {
-            handleError(error);
-        }
-
-    };
-
-    final IOpenPgpKeyIdsCallback.Stub getKeysSignAndEncryptCallback = new IOpenPgpKeyIdsCallback.Stub() {
-
-        @Override
-        public void onSuccess(final long[] keyIds) throws RemoteException {
-            Log.d(Constants.TAG, "getKeysSignAndEncryptCallback keyId " + keyIds[0]);
-
-            mActivity.runOnUiThread(new Runnable() {
-
-                @Override
-                public void run() {
-                    // encrypt after getting key ids
-                    String inputStr = mMessage.getText().toString();
-                    OpenPgpData input = new OpenPgpData(inputStr);
-
-                    try {
-                        mCryptoServiceConnection.getService().signAndEncrypt(input,
-                                new OpenPgpData(OpenPgpData.TYPE_STRING), keyIds, encryptCallback);
-                    } catch (RemoteException e) {
-                        Log.e(Constants.TAG, "CryptoProviderDemo", e);
-                    }
-                }
-            });
-        }
-
-        @Override
-        public void onError(OpenPgpError error) throws RemoteException {
-            handleError(error);
-        }
-
-    };
-
-    final IOpenPgpCallback.Stub encryptCallback = new IOpenPgpCallback.Stub() {
-
-        @Override
-        public void onSuccess(final OpenPgpData output, OpenPgpSignatureResult signatureResult)
-                throws RemoteException {
-            Log.d(Constants.TAG, "encryptCallback");
-
-            runOnUiThread(new Runnable() {
-
-                @Override
-                public void run() {
-                    mCiphertext.setText(output.getString());
-                }
-            });
-        }
-
-        @Override
-        public void onError(OpenPgpError error) throws RemoteException {
-            handleError(error);
-        }
-
-    };
-
-    final IOpenPgpCallback.Stub decryptAndVerifyCallback = new IOpenPgpCallback.Stub() {
-
-        @Override
-        public void onSuccess(final OpenPgpData output, final OpenPgpSignatureResult signatureResult)
-                throws RemoteException {
-            Log.d(Constants.TAG, "decryptAndVerifyCallback");
-
-            runOnUiThread(new Runnable() {
-
-                @Override
-                public void run() {
-                    mMessage.setText(output.getString());
-                    if (signatureResult != null) {
-                        Toast.makeText(OpenPgpProviderActivity.this,
-                                "signature result:\n" + signatureResult.toString(),
-                                Toast.LENGTH_LONG).show();
-                    }
-                }
-            });
-
-        }
+        mSign.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                sign(new Bundle());
+            }
+        });
+        mEncrypt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                encrypt(new Bundle());
+            }
+        });
+        mSignAndEncrypt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                signAndEncrypt(new Bundle());
+            }
+        });
+        mDecryptAndVerify.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                decryptAndVerify(new Bundle());
+            }
+        });
 
-        @Override
-        public void onError(OpenPgpError error) throws RemoteException {
-            handleError(error);
+        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
+        String providerPackageName = settings.getString("openpgp_provider_list", "");
+        if (TextUtils.isEmpty(providerPackageName)) {
+            Toast.makeText(this, "No OpenPGP Provider selected!", Toast.LENGTH_LONG).show();
+            finish();
+        } else {
+            // bind to service
+            mServiceConnection = new OpenPgpServiceConnection(
+                    OpenPgpProviderActivity.this, providerPackageName);
+            mServiceConnection.bindToService();
         }
-
-    };
+    }
 
     private void handleError(final OpenPgpError error) {
-        mActivity.runOnUiThread(new Runnable() {
+        runOnUiThread(new Runnable() {
 
             @Override
             public void run() {
-                Toast.makeText(mActivity,
+                Toast.makeText(OpenPgpProviderActivity.this,
                         "onError id:" + error.getErrorId() + "\n\n" + error.getMessage(),
                         Toast.LENGTH_LONG).show();
                 Log.e(Constants.TAG, "onError getErrorId:" + error.getErrorId());
@@ -199,154 +121,157 @@ public class OpenPgpProviderActivity extends Activity {
         });
     }
 
-    public void encryptOnClick(View view) {
+    /**
+     * Takes input from message or ciphertext EditText and turns it into a ByteArrayInputStream
+     *
+     * @param ciphertext
+     * @return
+     */
+    private InputStream getInputstream(boolean ciphertext) {
+        InputStream is = null;
         try {
-            mCryptoServiceConnection.getService().getKeyIds(
-                    mEncryptUserIds.getText().toString().split(","), true, getKeysEncryptCallback);
-        } catch (RemoteException e) {
-            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+            String inputStr = null;
+            if (ciphertext) {
+                inputStr = mCiphertext.getText().toString();
+            } else {
+                inputStr = mMessage.getText().toString();
+            }
+            is = new ByteArrayInputStream(inputStr.getBytes("UTF-8"));
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
         }
+
+        return is;
     }
 
-    public void signOnClick(View view) {
-        String inputStr = mMessage.getText().toString();
-        OpenPgpData input = new OpenPgpData(inputStr);
+    private class MyCallback implements OpenPgpApi.IOpenPgpCallback {
+        boolean returnToCiphertextField;
+        ByteArrayOutputStream os;
+        int requestCode;
 
-        try {
-            mCryptoServiceConnection.getService().sign(input,
-                    new OpenPgpData(OpenPgpData.TYPE_STRING), encryptCallback);
-        } catch (RemoteException e) {
-            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        private MyCallback(boolean returnToCiphertextField, ByteArrayOutputStream os, int requestCode) {
+            this.returnToCiphertextField = returnToCiphertextField;
+            this.os = os;
+            this.requestCode = requestCode;
         }
-    }
 
-    public void signAndEncryptOnClick(View view) {
-        try {
-            mCryptoServiceConnection.getService().getKeyIds(
-                    mEncryptUserIds.getText().toString().split(","), true,
-                    getKeysSignAndEncryptCallback);
-        } catch (RemoteException e) {
-            Log.e(Constants.TAG, "CryptoProviderDemo", e);
+        @Override
+        public void onReturn(Bundle result) {
+            switch (result.getInt(OpenPgpConstants.RESULT_CODE)) {
+                case OpenPgpConstants.RESULT_CODE_SUCCESS: {
+                    try {
+                        Log.d(OpenPgpConstants.TAG, "result: " + os.toByteArray().length
+                                + " str=" + os.toString("UTF-8"));
+
+                        if (returnToCiphertextField) {
+                            mCiphertext.setText(os.toString("UTF-8"));
+                        } else {
+                            mMessage.setText(os.toString("UTF-8"));
+                        }
+                    } catch (UnsupportedEncodingException e) {
+                        Log.e(Constants.TAG, "UnsupportedEncodingException", e);
+                    }
+                    break;
+                }
+                case OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED: {
+                    PendingIntent pi = result.getParcelable(OpenPgpConstants.RESULT_INTENT);
+                    try {
+                        OpenPgpProviderActivity.this.startIntentSenderForResult(pi.getIntentSender(),
+                                requestCode, null, 0, 0, 0);
+                    } catch (IntentSender.SendIntentException e) {
+                        Log.e(Constants.TAG, "SendIntentException", e);
+                    }
+                    break;
+                }
+                case OpenPgpConstants.RESULT_CODE_ERROR: {
+                    OpenPgpError error = result.getParcelable(OpenPgpConstants.RESULT_ERRORS);
+                    handleError(error);
+                    break;
+                }
+            }
         }
     }
 
-    public void decryptAndVerifyOnClick(View view) {
-        String inputStr = mCiphertext.getText().toString();
-        OpenPgpData input = new OpenPgpData(inputStr);
-
-        try {
-            mCryptoServiceConnection.getService().decryptAndVerify(input,
-                    new OpenPgpData(OpenPgpData.TYPE_STRING), decryptAndVerifyCallback);
-        } catch (RemoteException e) {
-            Log.e(Constants.TAG, "CryptoProviderDemo", e);
-        }
-    }
+    public void sign(Bundle params) {
+        params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true);
 
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
+        InputStream is = getInputstream(false);
+        final ByteArrayOutputStream os = new ByteArrayOutputStream();
 
-        if (mCryptoServiceConnection != null) {
-            mCryptoServiceConnection.unbindFromService();
-        }
+        OpenPgpApi api = new OpenPgpApi(this, mServiceConnection.getService());
+        api.sign(params, is, os, new MyCallback(true, os, REQUEST_CODE_SIGN));
     }
 
-    private static class OpenPgpProviderElement {
-        private String packageName;
-        private String simpleName;
-        private Drawable icon;
+    public void encrypt(Bundle params) {
+        params.putStringArray(OpenPgpConstants.PARAMS_USER_IDS, mEncryptUserIds.getText().toString().split(","));
+        params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true);
 
-        public OpenPgpProviderElement(String packageName, String simpleName, Drawable icon) {
-            this.packageName = packageName;
-            this.simpleName = simpleName;
-            this.icon = icon;
-        }
+        InputStream is = getInputstream(false);
+        final ByteArrayOutputStream os = new ByteArrayOutputStream();
 
-        @Override
-        public String toString() {
-            return simpleName;
-        }
+        OpenPgpApi api = new OpenPgpApi(this, mServiceConnection.getService());
+        api.encrypt(params, is, os, new MyCallback(true, os, REQUEST_CODE_ENCRYPT));
     }
 
-    private void selectCryptoProvider() {
-        Intent intent = new Intent(IOpenPgpService.class.getName());
+    public void signAndEncrypt(Bundle params) {
+        params.putStringArray(OpenPgpConstants.PARAMS_USER_IDS, mEncryptUserIds.getText().toString().split(","));
+        params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true);
 
-        final ArrayList<OpenPgpProviderElement> providerList = new ArrayList<OpenPgpProviderElement>();
+        InputStream is = getInputstream(false);
+        final ByteArrayOutputStream os = new ByteArrayOutputStream();
 
-        List<ResolveInfo> resInfo = getPackageManager().queryIntentServices(intent, 0);
-        if (!resInfo.isEmpty()) {
-            for (ResolveInfo resolveInfo : resInfo) {
-                if (resolveInfo.serviceInfo == null)
-                    continue;
+        OpenPgpApi api = new OpenPgpApi(this, mServiceConnection.getService());
+        api.signAndEncrypt(params, is, os, new MyCallback(true, os, REQUEST_CODE_SIGN_AND_ENCRYPT));
+    }
 
-                String packageName = resolveInfo.serviceInfo.packageName;
-                String simpleName = String.valueOf(resolveInfo.serviceInfo
-                        .loadLabel(getPackageManager()));
-                Drawable icon = resolveInfo.serviceInfo.loadIcon(getPackageManager());
-                providerList.add(new OpenPgpProviderElement(packageName, simpleName, icon));
-            }
-        }
+    public void decryptAndVerify(Bundle params) {
+        params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true);
 
-        AlertDialog.Builder alert = new AlertDialog.Builder(this);
-        alert.setTitle("Select OpenPGP Provider!");
-        alert.setCancelable(false);
+        InputStream is = getInputstream(true);
+        final ByteArrayOutputStream os = new ByteArrayOutputStream();
 
-        if (!providerList.isEmpty()) {
-            // add "disable OpenPGP provider"
-            providerList.add(0, new OpenPgpProviderElement(null, "Disable OpenPGP Provider",
-                    getResources().getDrawable(android.R.drawable.ic_menu_close_clear_cancel)));
+        OpenPgpApi api = new OpenPgpApi(this, mServiceConnection.getService());
+        api.decryptAndVerify(params, is, os, new MyCallback(false, os, REQUEST_CODE_DECRYPT_AND_VERIFY));
+    }
 
-            // Init ArrayAdapter with OpenPGP Providers
-            ListAdapter adapter = new ArrayAdapter<OpenPgpProviderElement>(this,
-                    android.R.layout.select_dialog_item, android.R.id.text1, providerList) {
-                public View getView(int position, View convertView, ViewGroup parent) {
-                    // User super class to create the View
-                    View v = super.getView(position, convertView, parent);
-                    TextView tv = (TextView) v.findViewById(android.R.id.text1);
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
 
-                    // Put the image on the TextView
-                    tv.setCompoundDrawablesWithIntrinsicBounds(providerList.get(position).icon,
-                            null, null, null);
+        Log.d(Constants.TAG, "onActivityResult resultCode: " + resultCode);
 
-                    // Add margin between image and text (support various screen densities)
-                    int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
-                    tv.setCompoundDrawablePadding(dp5);
+        // try again after user interaction
+        if (resultCode == RESULT_OK) {
+            Bundle params = data.getBundleExtra(OpenPgpConstants.PI_RESULT_PARAMS);
 
-                    return v;
+            switch (requestCode) {
+                case REQUEST_CODE_SIGN: {
+                    sign(params);
+                    break;
                 }
-            };
-
-            alert.setSingleChoiceItems(adapter, -1, new DialogInterface.OnClickListener() {
-
-                public void onClick(DialogInterface dialog, int position) {
-                    String packageName = providerList.get(position).packageName;
-
-                    if (packageName == null) {
-                        dialog.cancel();
-                        finish();
-                    }
-
-                    // bind to service
-                    mCryptoServiceConnection = new OpenPgpServiceConnection(
-                            OpenPgpProviderActivity.this, packageName);
-                    mCryptoServiceConnection.bindToService();
-
-                    dialog.dismiss();
+                case REQUEST_CODE_ENCRYPT: {
+                    encrypt(params);
+                    break;
                 }
-            });
-        } else {
-            alert.setMessage("No OpenPGP Provider installed!");
+                case REQUEST_CODE_SIGN_AND_ENCRYPT: {
+                    signAndEncrypt(params);
+                    break;
+                }
+                case REQUEST_CODE_DECRYPT_AND_VERIFY: {
+                    decryptAndVerify(params);
+                    break;
+                }
+            }
         }
+    }
 
-        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
-
-            public void onClick(DialogInterface dialog, int id) {
-                dialog.cancel();
-                finish();
-            }
-        });
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
 
-        AlertDialog ad = alert.create();
-        ad.show();
+        if (mServiceConnection != null) {
+            mServiceConnection.unbindFromService();
+        }
     }
+
 }
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/layout/aidl_demo2.xml b/OpenPGP-Keychain-API/example-app/src/main/res/layout/aidl_demo2.xml
deleted file mode 100644
index 73abd9b5c..000000000
--- a/OpenPGP-Keychain-API/example-app/src/main/res/layout/aidl_demo2.xml
+++ /dev/null
@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content" >
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:orientation="vertical" >
-
-        <Button
-            android:id="@+id/aidl_demo_select_encryption_key"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:onClick="selectEncryptionKeysOnClick"
-            android:text="Select encryption key(s)" />
-
-        <EditText
-            android:id="@+id/aidl_demo_keyrings"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="keyrings output"
-            android:textAppearance="@android:style/TextAppearance.Small" />
-
-        <Button
-            android:id="@+id/aidl_demo_get_keyrings_strings"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:onClick="getKeyringsStringsOnClick"
-            android:text="getKeyrings as Strings" />
-
-        <Button
-            android:id="@+id/aidl_demo_get_keyrings_bytes"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:onClick="getKeyringsBytesOnClick"
-            android:text="getKeyringsBytes" />
-    </LinearLayout>
-
-</ScrollView>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/layout/crypto_provider_demo.xml b/OpenPGP-Keychain-API/example-app/src/main/res/layout/crypto_provider_demo.xml
deleted file mode 100644
index 9f2a0e6ee..000000000
--- a/OpenPGP-Keychain-API/example-app/src/main/res/layout/crypto_provider_demo.xml
+++ /dev/null
@@ -1,83 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical" >
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Encrypt UserIds (split with &apos;,&apos;)"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:id="@+id/crypto_provider_demo_encrypt_user_id"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="dominik@dominikschuermann.de"
-        android:textAppearance="@android:style/TextAppearance.Small" />
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Message"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:id="@+id/crypto_provider_demo_message"
-        android:layout_width="match_parent"
-        android:layout_height="100dip"
-        android:scrollHorizontally="true"
-        android:scrollbars="vertical"
-        android:text="message"
-        android:textAppearance="@android:style/TextAppearance.Small" />
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Ciphertext"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:id="@+id/crypto_provider_demo_ciphertext"
-        android:layout_width="match_parent"
-        android:layout_height="100dip"
-        android:text="ciphertext"
-        android:textAppearance="@android:style/TextAppearance.Small" />
-
-    <LinearLayout
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content" >
-
-        <Button
-            android:id="@+id/crypto_provider_demo_encrypt"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:onClick="encryptOnClick"
-            android:text="Encrypt" />
-
-        <Button
-            android:id="@+id/crypto_provider_demo_sign"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:onClick="signOnClick"
-            android:text="Sign" />
-
-        <Button
-            android:id="@+id/crypto_provider_demo_encrypt_and_sign"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:onClick="signAndEncryptOnClick"
-            android:text="Sign and Encrypt" />
-    </LinearLayout>
-
-    <Button
-        android:id="@+id/crypto_provider_demo_decrypt_and_verify"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:onClick="decryptAndVerifyOnClick"
-        android:text="Decrypt and Verify" />
-
-</LinearLayout>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/layout/intent_demo.xml b/OpenPGP-Keychain-API/example-app/src/main/res/layout/intent.xml
index a765343f9..ed416a05f 100644
--- a/OpenPGP-Keychain-API/example-app/src/main/res/layout/intent_demo.xml
+++ b/OpenPGP-Keychain-API/example-app/src/main/res/layout/intent.xml
@@ -12,7 +12,7 @@
             android:id="@+id/Button02"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:onClick="encryptOnClick"
+            android:onClick="encrypt"
             android:text="Encrypt" />
 
         <Button
@@ -54,7 +54,7 @@
             android:id="@+id/intent_demo_encrypt"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:onClick="encryptOnClick"
+            android:onClick="encrypt"
             android:text="Encrypt" />
 
         <Button
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/layout/openpgp_provider.xml b/OpenPGP-Keychain-API/example-app/src/main/res/layout/openpgp_provider.xml
new file mode 100644
index 000000000..6c2ce1a7c
--- /dev/null
+++ b/OpenPGP-Keychain-API/example-app/src/main/res/layout/openpgp_provider.xml
@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/parent_scroll"
+    android:fillViewport="true"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:padding="8dp"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Encrypt UserIds (split with &apos;,&apos;)"
+            android:textAppearance="?android:attr/textAppearanceMedium" />
+
+
+        <EditText
+            android:id="@+id/crypto_provider_demo_encrypt_user_id"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="dominik@dominikschuermann.de"
+            android:textAppearance="@android:style/TextAppearance.Small" />
+
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Message"
+            android:textAppearance="?android:attr/textAppearanceMedium" />
+
+
+        <ScrollView
+            android:id="@+id/child_scroll1"
+            android:fillViewport="true"
+            android:layout_width="match_parent"
+            android:layout_height="120dp">
+
+            <EditText
+                android:id="@+id/crypto_provider_demo_message"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:scrollHorizontally="true"
+                android:scrollbars="vertical"
+                android:text="message"
+                android:textAppearance="@android:style/TextAppearance.Small" />
+        </ScrollView>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Ciphertext"
+            android:textAppearance="?android:attr/textAppearanceMedium" />
+
+        <ScrollView
+            android:id="@+id/child_scroll2"
+            android:fillViewport="true"
+            android:layout_width="match_parent"
+            android:layout_height="120dp">
+
+            <EditText
+                android:id="@+id/crypto_provider_demo_ciphertext"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:text="ciphertext"
+                android:textAppearance="@android:style/TextAppearance.Small" />
+        </ScrollView>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <Button
+                android:id="@+id/crypto_provider_demo_sign"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Sign"
+                android:layout_gravity="center_vertical" />
+
+            <Button
+                android:id="@+id/crypto_provider_demo_encrypt"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Encrypt"
+                android:layout_gravity="center_vertical" />
+
+            <Button
+                android:id="@+id/crypto_provider_demo_sign_and_encrypt"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Sign and Encrypt"
+                android:layout_gravity="center_vertical" />
+        </LinearLayout>
+
+        <Button
+            android:id="@+id/crypto_provider_demo_decrypt_and_verify"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Decrypt and Verify" />
+
+    </LinearLayout>
+</ScrollView>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/xml/base_preference.xml b/OpenPGP-Keychain-API/example-app/src/main/res/xml/base_preference.xml
index 5febfad44..b38e07a36 100644
--- a/OpenPGP-Keychain-API/example-app/src/main/res/xml/base_preference.xml
+++ b/OpenPGP-Keychain-API/example-app/src/main/res/xml/base_preference.xml
@@ -1,23 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <PreferenceCategory android:title="Intent" >
+    <PreferenceCategory android:title="OpenKeychain Intents">
         <Preference
             android:key="intent_demo"
             android:title="Intent Demo" />
     </PreferenceCategory>
-    <!-- <PreferenceCategory android:title="AIDL" > -->
-    <!-- <Preference -->
-    <!-- android:key="aidl_demo2" -->
-    <!-- android:title="AIDL Demo (ACCESS_KEYS permission)" /> -->
-    <!-- </PreferenceCategory> -->
-    <PreferenceCategory android:title="OpenPGP Provider" >
-        <org.openintents.openpgp.OpenPgpListPreference
+    <PreferenceCategory android:title="OpenPGP Provider API">
+        <org.openintents.openpgp.util.OpenPgpListPreference
             android:key="openpgp_provider_list"
             android:title="Select OpenPGP Provider!" />
         <Preference
             android:key="openpgp_provider_demo"
-            android:title="OpenPGP Provider" />
+            android:title="OpenPGP Provider Demo" />
     </PreferenceCategory>
 
 </PreferenceScreen>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/example-app/src/main/res/xml/intent_preference.xml b/OpenPGP-Keychain-API/example-app/src/main/res/xml/intent_preference.xml
new file mode 100644
index 000000000..801e4a78a
--- /dev/null
+++ b/OpenPGP-Keychain-API/example-app/src/main/res/xml/intent_preference.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <PreferenceCategory android:title="Intents (org.sufficientlysecure.keychain.action.)">
+        <Preference
+            android:key="ENCRYPT"
+            android:title="ENCRYPT" />
+        <Preference
+            android:key="ENCRYPT_URI"
+            android:title="ENCRYPT with Uri" />
+        <Preference
+            android:key="DECRYPT"
+            android:title="DECRYPT" />
+        <Preference
+            android:key="IMPORT_KEY"
+            android:title="IMPORT_KEY" />
+        <Preference
+            android:key="IMPORT_KEY_FROM_KEYSERVER"
+            android:title="IMPORT_KEY_FROM_KEYSERVER" />
+        <Preference
+            android:key="IMPORT_KEY_FROM_QR_CODE"
+            android:title="IMPORT_KEY_FROM_QR_CODE" />
+    </PreferenceCategory>
+    <PreferenceCategory android:title="Special Intents">
+        <Preference
+            android:key="openpgp4fpr"
+            android:title="VIEW openpgp4fpr:73EE2314F65FA92EC2390D3A718C070100012282" />
+    </PreferenceCategory>
+
+</PreferenceScreen>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/gradle/wrapper/gradle-wrapper.properties b/OpenPGP-Keychain-API/gradle/wrapper/gradle-wrapper.properties
index 425cd64c7..932184188 100644
--- a/OpenPGP-Keychain-API/gradle/wrapper/gradle-wrapper.properties
+++ b/OpenPGP-Keychain-API/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Feb 09 19:10:32 CET 2014
+#Fri Feb 14 01:26:40 CET 2014
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-1.10-bin.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-1.10-all.zip
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/AndroidManifest.xml b/OpenPGP-Keychain-API/libraries/keychain-api-library/AndroidManifest.xml
index 32b4a82e5..768922c22 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/AndroidManifest.xml
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/AndroidManifest.xml
@@ -5,7 +5,7 @@
     android:versionName="1.0" >
 
     <uses-sdk
-        android:minSdkVersion="8"
+        android:minSdkVersion="9"
         android:targetSdkVersion="19" />
 
     <application/>
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/build.gradle b/OpenPGP-Keychain-API/libraries/keychain-api-library/build.gradle
index 2eacd2065..1d5911783 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/build.gradle
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/build.gradle
@@ -1,10 +1,11 @@
+// please leave this here, so this library builds on its own
 buildscript {
     repositories {
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.8.0'
+        classpath 'com.android.tools.build:gradle:0.8.3'
     }
 }
 
@@ -14,6 +15,19 @@ android {
     compileSdkVersion 19
     buildToolsVersion '19.0.1'
     
+    // NOTE: We are using the old folder structure to also support Eclipse
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java.srcDirs = ['src']
+            resources.srcDirs = ['src']
+            aidl.srcDirs = ['src']
+            renderscript.srcDirs = ['src']
+            res.srcDirs = ['res']
+            assets.srcDirs = ['assets']
+        }
+    }
+    
     // Do not abort build if lint finds errors
     lintOptions {
         abortOnError false
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..71b9118dc
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..270abf45f
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..1e3571fa5
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..52044601e
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/res/values/strings.xml b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/values/strings.xml
new file mode 100644
index 000000000..a198d0b5e
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/res/values/strings.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="openpgp_list_preference_none">None</string>
+
+</resources>
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl
deleted file mode 100644
index ba41de1ba..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpData;
-import org.openintents.openpgp.OpenPgpSignatureResult;
-import org.openintents.openpgp.OpenPgpError;
-
-interface IOpenPgpCallback {
-    
-    /**
-     * onSuccess returns on successful OpenPGP operations.
-     * 
-     * @param output
-     *            contains resulting output (decrypted content (when input was encrypted)
-     *            or content without signature (when input was signed-only))
-     * @param signatureResult
-     *            signatureResult is only non-null if decryptAndVerify() was called and the content
-     *            was encrypted or signed-and-encrypted.
-     */
-    oneway void onSuccess(in OpenPgpData output, in OpenPgpSignatureResult signatureResult);
-
-    /**
-     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
-     * was required execute an OpenPGP operation.
-     * 
-     * @param error
-     *            See OpenPgpError class for more information.
-     */
-    oneway void onError(in OpenPgpError error);
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
deleted file mode 100644
index 4ca356fad..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpError;
-
-interface IOpenPgpKeyIdsCallback {
-    
-    /**
-     * onSuccess returns on successful getKeyIds operations.
-     * 
-     * @param keyIds
-     *            returned key ids
-     */
-    oneway void onSuccess(in long[] keyIds);
-
-    /**
-     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
-     * was required execute an OpenPGP operation.
-     * 
-     * @param error
-     *            See OpenPgpError class for more information.
-     */
-    oneway void onError(in OpenPgpError error);
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
deleted file mode 100644
index 8f9e8a0fd..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpData;
-import org.openintents.openpgp.IOpenPgpCallback;
-import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
-
-/**
- * All methods are oneway, which means they are asynchronous and non-blocking.
- * Results are returned to the callback, which has to be implemented on client side.
- */
-interface IOpenPgpService {
-
-    /**
-     * Sign
-     * 
-     * After successful signing, callback's onSuccess will contain the resulting output.
-     *
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void sign(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
-    
-    /**
-     * Encrypt
-     * 
-     * After successful encryption, callback's onSuccess will contain the resulting output.
-     * 
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param keyIds
-     *            Key Ids of recipients. Can be retrieved with getKeyIds()
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void encrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
-    
-    /**
-     * Sign then encrypt
-     * 
-     * After successful signing and encryption, callback's onSuccess will contain the resulting output.
-     *
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param keyIds
-     *            Key Ids of recipients. Can be retrieved with getKeyIds()
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void signAndEncrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
-    
-    /**
-     * Decrypts and verifies given input bytes. This methods handles encrypted-only, signed-and-encrypted,
-     * and also signed-only input.
-     * 
-     * After successful decryption/verification, callback's onSuccess will contain the resulting output.
-     * The signatureResult in onSuccess is only non-null if signed-and-encrypted or signed-only inputBytes were given.
-     * 
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void decryptAndVerify(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
-    
-    /**
-     * Get available key ids based on given user ids
-     *
-     * @param ids
-     *            User Ids (emails) of recipients OR key ids
-     * @param allowUserInteraction
-     *            Enable user interaction to lookup and import unknown keys
-     * @param callback
-     *            Callback where to return results (different type than callback in other functions!)
-     */
-    oneway void getKeyIds(in String[] ids, in boolean allowUserInteraction, in IOpenPgpKeyIdsCallback callback);
-    
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl
deleted file mode 100644
index 3711e4fb4..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpData so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpData;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl
deleted file mode 100644
index 7a6bed1e6..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpError so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpError;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl
deleted file mode 100644
index e246792d0..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpSignatureResult so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpSignatureResult;
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
deleted file mode 100644
index b1ca1bfe6..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.openintents.openpgp;
-
-public class OpenPgpConstants {
-
-    public static final String TAG = "OpenPgp API";
-
-    public static final int REQUIRED_API_VERSION = 1;
-    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
-
-}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java
deleted file mode 100644
index 6615c2146..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import android.net.Uri;
-import android.os.Parcel;
-import android.os.ParcelFileDescriptor;
-import android.os.Parcelable;
-
-public class OpenPgpData implements Parcelable {
-    public static final int TYPE_STRING = 0;
-    public static final int TYPE_BYTE_ARRAY = 1;
-    public static final int TYPE_FILE_DESCRIPTOR = 2;
-    public static final int TYPE_URI = 3;
-
-    int type;
-
-    String string;
-    byte[] bytes = new byte[0];
-    ParcelFileDescriptor fileDescriptor;
-    Uri uri;
-
-    public int getType() {
-        return type;
-    }
-
-    public String getString() {
-        return string;
-    }
-
-    public byte[] getBytes() {
-        return bytes;
-    }
-
-    public ParcelFileDescriptor getFileDescriptor() {
-        return fileDescriptor;
-    }
-
-    public Uri getUri() {
-        return uri;
-    }
-
-    public OpenPgpData() {
-
-    }
-
-    /**
-     * Not a real constructor. This can be used to define requested output type.
-     * 
-     * @param type
-     */
-    public OpenPgpData(int type) {
-        this.type = type;
-    }
-
-    public OpenPgpData(String string) {
-        this.string = string;
-        this.type = TYPE_STRING;
-    }
-
-    public OpenPgpData(byte[] bytes) {
-        this.bytes = bytes;
-        this.type = TYPE_BYTE_ARRAY;
-    }
-
-    public OpenPgpData(ParcelFileDescriptor fileDescriptor) {
-        this.fileDescriptor = fileDescriptor;
-        this.type = TYPE_FILE_DESCRIPTOR;
-    }
-
-    public OpenPgpData(Uri uri) {
-        this.uri = uri;
-        this.type = TYPE_URI;
-    }
-
-    public OpenPgpData(OpenPgpData b) {
-        this.string = b.string;
-        this.bytes = b.bytes;
-        this.fileDescriptor = b.fileDescriptor;
-        this.uri = b.uri;
-    }
-
-    public int describeContents() {
-        return 0;
-    }
-
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(type);
-        dest.writeString(string);
-        dest.writeInt(bytes.length);
-        dest.writeByteArray(bytes);
-        dest.writeParcelable(fileDescriptor, 0);
-        dest.writeParcelable(uri, 0);
-    }
-
-    public static final Creator<OpenPgpData> CREATOR = new Creator<OpenPgpData>() {
-        public OpenPgpData createFromParcel(final Parcel source) {
-            OpenPgpData vr = new OpenPgpData();
-            vr.type = source.readInt();
-            vr.string = source.readString();
-            vr.bytes = new byte[source.readInt()];
-            source.readByteArray(vr.bytes);
-            vr.fileDescriptor = source.readParcelable(ParcelFileDescriptor.class.getClassLoader());
-            vr.fileDescriptor = source.readParcelable(Uri.class.getClassLoader());
-            return vr;
-        }
-
-        public OpenPgpData[] newArray(final int size) {
-            return new OpenPgpData[size];
-        }
-    };
-
-}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
deleted file mode 100644
index 7305c47ce..000000000
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import java.util.List;
-import java.util.regex.Pattern;
-
-import android.content.Context;
-import android.content.Intent;
-import android.content.pm.ResolveInfo;
-
-public class OpenPgpHelper {
-    private Context context;
-
-    public static Pattern PGP_MESSAGE = Pattern.compile(
-            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*", Pattern.DOTALL);
-
-    public static Pattern PGP_SIGNED_MESSAGE = Pattern
-            .compile(
-                    ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
-                    Pattern.DOTALL);
-
-    public OpenPgpHelper(Context context) {
-        super();
-        this.context = context;
-    }
-
-    public boolean isAvailable() {
-        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
-        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
-        if (!resInfo.isEmpty()) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl
new file mode 100644
index 000000000..578a7d4b5
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+interface IOpenPgpService {
+
+    /**
+     * General extras
+     * --------------
+     * 
+     * Bundle params:
+     * int          api_version (required)
+     * boolean      ascii_armor (request ascii armor for ouput)
+     *
+     * returned Bundle:
+     * int          result_code (0, 1, or 2 (see OpenPgpConstants))
+     * OpenPgpError error       (if result_code == 0)
+     * Intent       intent      (if result_code == 2)
+     *
+     */
+
+    /**
+     * Sign only
+     *
+     * optional params:
+     * String       passphrase  (for key passphrase)
+     */
+    Bundle sign(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Encrypt
+     *
+     * Bundle params:
+     * long[]       key_ids
+     * or
+     * String[]     user_ids    (= emails of recipients) (if more than one key has this user_id, a PendingIntent is returned)
+     *
+     * optional params:
+     * String       passphrase  (for key passphrase)
+     */
+    Bundle encrypt(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Sign and encrypt
+     *
+     * Bundle params:
+     * same as in encrypt()
+     */
+    Bundle signAndEncrypt(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Decrypts and verifies given input bytes. This methods handles encrypted-only, signed-and-encrypted,
+     * and also signed-only input.
+     *
+     * returned Bundle:
+     * OpenPgpSignatureResult   signature_result
+     */
+    Bundle decryptAndVerify(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Retrieves key ids based on given user ids (=emails)
+     *
+     * Bundle params:
+     * String[]     user_ids
+     *
+     * returned Bundle:
+     * long[]       key_ids
+     */
+    Bundle getKeyIds(in Bundle params);
+
+}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpError.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpError.java
index f108d3169..4dd2cc641 100644
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpError.java
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpError.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,10 +20,13 @@ import android.os.Parcel;
 import android.os.Parcelable;
 
 public class OpenPgpError implements Parcelable {
+    public static final int CLIENT_SIDE_ERROR = -1;
+
     public static final int GENERIC_ERROR = 0;
-    public static final int NO_OR_WRONG_PASSPHRASE = 1;
-    public static final int NO_USER_IDS = 2;
-    public static final int USER_INTERACTION_REQUIRED = 3;
+    public static final int INCOMPATIBLE_API_VERSIONS = 1;
+
+    public static final int NO_OR_WRONG_PASSPHRASE = 2;
+    public static final int NO_USER_IDS = 3;
 
     int errorId;
     String message;
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpSignatureResult.java
index 829f8f8cf..16c79ca27 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpSignatureResult.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,14 +22,14 @@ import android.os.Parcelable;
 public class OpenPgpSignatureResult implements Parcelable {
     // generic error on signature verification
     public static final int SIGNATURE_ERROR = 0;
-    // successfully verified signature, with trusted public key
-    public static final int SIGNATURE_SUCCESS_TRUSTED = 1;
+    // successfully verified signature, with certified public key
+    public static final int SIGNATURE_SUCCESS_CERTIFIED = 1;
     // no public key was found for this signature verification
     // you can retrieve the key with
     // getKeys(new String[] {String.valueOf(signatureResult.getKeyId)}, true, callback)
     public static final int SIGNATURE_UNKNOWN_PUB_KEY = 2;
-    // successfully verified signature, but with untrusted public key
-    public static final int SIGNATURE_SUCCESS_UNTRUSTED = 3;
+    // successfully verified signature, but with certified public key
+    public static final int SIGNATURE_SUCCESS_UNCERTIFIED = 3;
 
     int status;
     boolean signatureOnly;
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java
new file mode 100644
index 000000000..f121c345d
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.content.Context;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import org.openintents.openpgp.IOpenPgpService;
+import org.openintents.openpgp.OpenPgpError;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class OpenPgpApi {
+
+    IOpenPgpService mService;
+    Context mContext;
+
+    private static final int OPERATION_SIGN = 0;
+    private static final int OPERATION_ENCRYPT = 1;
+    private static final int OPERATION_SIGN_ENCRYPT = 2;
+    private static final int OPERATION_DECRYPT_VERIFY = 3;
+    private static final int OPERATION_GET_KEY_IDS = 4;
+
+    public OpenPgpApi(Context context, IOpenPgpService service) {
+        this.mContext = context;
+        this.mService = service;
+    }
+
+    public Bundle sign(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN, new Bundle(), is, os);
+    }
+
+    public Bundle sign(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN, params, is, os);
+    }
+
+    public void sign(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_SIGN, params, is, os, callback);
+    }
+
+    public Bundle encrypt(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_ENCRYPT, new Bundle(), is, os);
+    }
+
+    public Bundle encrypt(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_ENCRYPT, params, is, os);
+    }
+
+    public void encrypt(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_ENCRYPT, params, is, os, callback);
+    }
+
+    public Bundle signAndEncrypt(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN_ENCRYPT, new Bundle(), is, os);
+    }
+
+    public Bundle signAndEncrypt(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN_ENCRYPT, params, is, os);
+    }
+
+    public void signAndEncrypt(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_SIGN_ENCRYPT, params, is, os, callback);
+    }
+
+    public Bundle decryptAndVerify(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_DECRYPT_VERIFY, new Bundle(), is, os);
+    }
+
+    public Bundle decryptAndVerify(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_DECRYPT_VERIFY, params, is, os);
+    }
+
+    public void decryptAndVerify(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_DECRYPT_VERIFY, params, is, os, callback);
+    }
+
+    public Bundle getKeyIds(Bundle params) {
+        return executeApi(OPERATION_GET_KEY_IDS, params, null, null);
+    }
+
+    public interface IOpenPgpCallback {
+        void onReturn(final Bundle result);
+    }
+
+    private class OpenPgpAsyncTask extends AsyncTask<Void, Integer, Bundle> {
+        int operationId;
+        Bundle params;
+        InputStream is;
+        OutputStream os;
+        IOpenPgpCallback callback;
+
+        private OpenPgpAsyncTask(int operationId, Bundle params, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+            this.operationId = operationId;
+            this.params = params;
+            this.is = is;
+            this.os = os;
+            this.callback = callback;
+        }
+
+        @Override
+        protected Bundle doInBackground(Void... unused) {
+            return executeApi(operationId, params, is, os);
+        }
+
+        protected void onPostExecute(Bundle result) {
+            callback.onReturn(result);
+        }
+
+    }
+
+    private void executeApiAsync(int operationId, Bundle params, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+        new OpenPgpAsyncTask(operationId, params, is, os, callback).execute((Void[]) null);
+    }
+
+    private Bundle executeApi(int operationId, Bundle params, InputStream is, OutputStream os) {
+        try {
+            params.putInt(OpenPgpConstants.PARAMS_API_VERSION, OpenPgpConstants.API_VERSION);
+
+            Bundle result = null;
+
+            if (operationId == OPERATION_GET_KEY_IDS) {
+                result = mService.getKeyIds(params);
+                return result;
+            } else {
+                // send the input and output pfds
+                ParcelFileDescriptor input = ParcelFileDescriptorUtil.pipeFrom(is,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                Log.d(OpenPgpConstants.TAG, "Copy to service finished");
+                            }
+                        });
+                ParcelFileDescriptor output = ParcelFileDescriptorUtil.pipeTo(os,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                Log.d(OpenPgpConstants.TAG, "Service finished writing!");
+                            }
+                        });
+
+
+                // blocks until result is ready
+                switch (operationId) {
+                    case OPERATION_SIGN:
+                        result = mService.sign(params, input, output);
+                        break;
+                    case OPERATION_ENCRYPT:
+                        result = mService.encrypt(params, input, output);
+                        break;
+                    case OPERATION_SIGN_ENCRYPT:
+                        result = mService.signAndEncrypt(params, input, output);
+                        break;
+                    case OPERATION_DECRYPT_VERIFY:
+                        result = mService.decryptAndVerify(params, input, output);
+                        break;
+                }
+                // close() is required to halt the TransferThread
+                output.close();
+
+                // set class loader to current context to allow unparcelling
+                // of OpenPgpError and OpenPgpSignatureResult
+                // http://stackoverflow.com/a/3806769
+                result.setClassLoader(mContext.getClassLoader());
+
+                return result;
+            }
+        } catch (Exception e) {
+            Log.e(OpenPgpConstants.TAG, "Exception", e);
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                    new OpenPgpError(OpenPgpError.CLIENT_SIDE_ERROR, e.getMessage()));
+            return result;
+        }
+    }
+
+
+}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java
new file mode 100644
index 000000000..9a2d3c054
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+public class OpenPgpConstants {
+
+    public static final String TAG = "OpenPgp API";
+
+    public static final int API_VERSION = 1;
+    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
+
+    /* Bundle params */
+    public static final String PARAMS_API_VERSION = "api_version";
+    // request ASCII Armor for output
+    // OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+    public static final String PARAMS_REQUEST_ASCII_ARMOR = "ascii_armor";
+    // (for encrypt method)
+    public static final String PARAMS_USER_IDS = "user_ids";
+    public static final String PARAMS_KEY_IDS = "key_ids";
+    // optional parameter:
+    public static final String PARAMS_PASSPHRASE = "passphrase";
+
+    /* Service Bundle returns */
+    public static final String RESULT_CODE = "result_code";
+    public static final String RESULT_SIGNATURE = "signature";
+    public static final String RESULT_ERRORS = "error";
+    public static final String RESULT_INTENT = "intent";
+
+    // get actual error object from RESULT_ERRORS
+    public static final int RESULT_CODE_ERROR = 0;
+    // success!
+    public static final int RESULT_CODE_SUCCESS = 1;
+    // executeServiceMethod intent and do it again with params from intent
+    public static final int RESULT_CODE_USER_INTERACTION_REQUIRED = 2;
+
+    /* PendingIntent returns */
+    public static final String PI_RESULT_PARAMS = "params";
+
+}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpListPreference.java
index 4ddd97485..034186a3a 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpListPreference.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,18 +14,14 @@
  * limitations under the License.
  */
 
-package org.openintents.openpgp;
-
-import java.util.ArrayList;
-import java.util.List;
+package org.openintents.openpgp.util;
 
 import android.app.AlertDialog.Builder;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.content.pm.ServiceInfo;
+import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.preference.DialogPreference;
 import android.util.AttributeSet;
@@ -35,33 +31,21 @@ import android.widget.ArrayAdapter;
 import android.widget.ListAdapter;
 import android.widget.TextView;
 
+import java.util.ArrayList;
+import java.util.List;
+
+import org.sufficientlysecure.keychain.api.R;
+
+/**
+ * Does not extend ListPreference, but is very similar to it!
+ * http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android/4.4_r1/android/preference/ListPreference.java/?v=source
+ */
 public class OpenPgpListPreference extends DialogPreference {
-    ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
+    private ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
     private String mSelectedPackage;
 
     public OpenPgpListPreference(Context context, AttributeSet attrs) {
         super(context, attrs);
-
-        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(
-                new Intent(OpenPgpConstants.SERVICE_INTENT), PackageManager.GET_META_DATA);
-        if (!resInfo.isEmpty()) {
-            for (ResolveInfo resolveInfo : resInfo) {
-                if (resolveInfo.serviceInfo == null)
-                    continue;
-
-                String packageName = resolveInfo.serviceInfo.packageName;
-                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(context
-                        .getPackageManager()));
-                Drawable icon = resolveInfo.serviceInfo.loadIcon(context.getPackageManager());
-
-                // get api version
-                ServiceInfo si = resolveInfo.serviceInfo;
-                int apiVersion = si.metaData.getInt("api_version");
-
-                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon,
-                        apiVersion));
-            }
-        }
     }
 
     public OpenPgpListPreference(Context context) {
@@ -69,20 +53,42 @@ public class OpenPgpListPreference extends DialogPreference {
     }
 
     /**
-     * Can be used to add "no selection"
-     * 
+     * Public method to add new entries for legacy applications
+     *
      * @param packageName
      * @param simpleName
      * @param icon
      */
-    public void addProvider(int position, String packageName, String simpleName, Drawable icon,
-            int apiVersion) {
-        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon,
-                apiVersion));
+    public void addProvider(int position, String packageName, String simpleName, Drawable icon) {
+        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon));
     }
 
     @Override
     protected void onPrepareDialogBuilder(Builder builder) {
+
+        // get providers
+        mProviderList.clear();
+        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = getContext().getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(getContext()
+                        .getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(getContext().getPackageManager());
+
+                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon));
+            }
+        }
+
+        // add "none"-entry
+        mProviderList.add(0, new OpenPgpProviderEntry("",
+                getContext().getString(R.string.openpgp_list_preference_none),
+                getContext().getResources().getDrawable(R.drawable.ic_action_cancel_launchersize)));
+
         // Init ArrayAdapter with OpenPGP Providers
         ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
                 android.R.layout.select_dialog_singlechoice, android.R.id.text1, mProviderList) {
@@ -99,15 +105,6 @@ public class OpenPgpListPreference extends DialogPreference {
                 int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
                 tv.setCompoundDrawablePadding(dp10);
 
-                // disable if it has the wrong api_version
-                if (mProviderList.get(position).apiVersion == OpenPgpConstants.REQUIRED_API_VERSION) {
-                    tv.setEnabled(true);
-                } else {
-                    tv.setEnabled(false);
-                    tv.setText(tv.getText() + " (API v" + mProviderList.get(position).apiVersion
-                            + ", needs v" + OpenPgpConstants.REQUIRED_API_VERSION + ")");
-                }
-
                 return v;
             }
         };
@@ -169,6 +166,16 @@ public class OpenPgpListPreference extends DialogPreference {
         return getEntryByValue(mSelectedPackage);
     }
 
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        return a.getString(index);
+    }
+
+    @Override
+    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
+        setValue(restoreValue ? getPersistedString(mSelectedPackage) : (String) defaultValue);
+    }
+
     public String getEntryByValue(String packageName) {
         for (OpenPgpProviderEntry app : mProviderList) {
             if (app.packageName.equals(packageName)) {
@@ -183,14 +190,11 @@ public class OpenPgpListPreference extends DialogPreference {
         private String packageName;
         private String simpleName;
         private Drawable icon;
-        private int apiVersion;
 
-        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon,
-                int apiVersion) {
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon) {
             this.packageName = packageName;
             this.simpleName = simpleName;
             this.icon = icon;
-            this.apiVersion = apiVersion;
         }
 
         @Override
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
index f7ba06aaf..8e8812faa 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.openintents.openpgp;
+package org.openintents.openpgp.util;
 
 import org.openintents.openpgp.IOpenPgpService;
 
@@ -61,11 +61,12 @@ public class OpenPgpServiceConnection {
 
     /**
      * If not already bound, bind!
-     * 
+     *
      * @return
      */
     public boolean bindToService() {
-        if (mService == null && !mBound) { // if not already connected
+        // if not already connected
+        if (mService == null && !mBound) {
             try {
                 Log.d(OpenPgpConstants.TAG, "not bound yet");
 
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java
new file mode 100644
index 000000000..ffecaceba
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+
+public class OpenPgpUtils {
+
+    public static final Pattern PGP_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*",
+            Pattern.DOTALL);
+
+    public static final Pattern PGP_SIGNED_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
+            Pattern.DOTALL);
+
+    public static final int PARSE_RESULT_NO_PGP = -1;
+    public static final int PARSE_RESULT_MESSAGE = 0;
+    public static final int PARSE_RESULT_SIGNED_MESSAGE = 1;
+
+    public static int parseMessage(String message) {
+        Matcher matcherSigned = PGP_SIGNED_MESSAGE.matcher(message);
+        Matcher matcherMessage = PGP_MESSAGE.matcher(message);
+
+        if (matcherMessage.matches()) {
+            return PARSE_RESULT_MESSAGE;
+        } else if (matcherSigned.matches()) {
+            return PARSE_RESULT_SIGNED_MESSAGE;
+        } else {
+            return PARSE_RESULT_NO_PGP;
+        }
+    }
+
+    public static boolean isAvailable(Context context) {
+        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+}
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
new file mode 100644
index 000000000..75d4b8c18
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *               2013 Flow (http://stackoverflow.com/questions/18212152/transfer-inputstream-to-another-service-across-process-boundaries-with-parcelf)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class ParcelFileDescriptorUtil {
+
+    public interface IThreadListener {
+        void onThreadFinished(final Thread thread);
+    }
+
+    public static ParcelFileDescriptor pipeFrom(InputStream inputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(inputStream, new ParcelFileDescriptor.AutoCloseOutputStream(writeSide),
+                listener)
+                .start();
+
+        return readSide;
+    }
+
+    public static ParcelFileDescriptor pipeTo(OutputStream outputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(new ParcelFileDescriptor.AutoCloseInputStream(readSide), outputStream,
+                listener)
+                .start();
+
+        return writeSide;
+    }
+
+    static class TransferThread extends Thread {
+        final InputStream mIn;
+        final OutputStream mOut;
+        final IThreadListener mListener;
+
+        TransferThread(InputStream in, OutputStream out, IThreadListener listener) {
+            super("ParcelFileDescriptor Transfer Thread");
+            mIn = in;
+            mOut = out;
+            mListener = listener;
+            setDaemon(true);
+        }
+
+        @Override
+        public void run() {
+            byte[] buf = new byte[1024];
+            int len;
+
+            try {
+                while ((len = mIn.read(buf)) > 0) {
+                    mOut.write(buf, 0, len);
+                }
+                mOut.flush(); // just to be safe
+            } catch (IOException e) {
+                Log.e(OpenPgpConstants.TAG, "TransferThread" + getId() + ": writing failed", e);
+            } finally {
+                try {
+                    mIn.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpConstants.TAG, "TransferThread" + getId(), e);
+                }
+                try {
+                    mOut.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpConstants.TAG, "TransferThread" + getId(), e);
+                }
+            }
+            if (mListener != null) {
+                Log.d(OpenPgpConstants.TAG, "TransferThread " + getId() + " finished!");
+                mListener.onThreadFinished(this);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java
new file mode 100644
index 000000000..15aceb534
--- /dev/null
+++ b/OpenPGP-Keychain-API/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.api;
+
+public class OpenKeychainIntents {
+
+    public static final String ENCRYPT = "org.sufficientlysecure.keychain.action.ENCRYPT";
+    public static final String ENCRYPT_EXTRA_TEXT = "text"; // String
+    public static final String ENCRYPT_ASCII_ARMOR = "ascii_armor"; // boolean
+
+    public static final String DECRYPT = "org.sufficientlysecure.keychain.action.DECRYPT";
+    public static final String DECRYPT_EXTRA_TEXT = "text"; // String
+
+    public static final String IMPORT_KEY = "org.sufficientlysecure.keychain.action.IMPORT_KEY";
+    public static final String IMPORT_KEY_EXTRA_KEY_BYTES = "key_bytes"; // byte[]
+
+    public static final String IMPORT_KEY_FROM_KEYSERVER = "org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_KEYSERVER";
+    public static final String IMPORT_KEY_FROM_KEYSERVER_QUERY = "query"; // String
+    public static final String IMPORT_KEY_FROM_KEYSERVER_FINGERPRINT = "fingerprint"; // String
+
+    public static final String IMPORT_KEY_FROM_QR_CODE = "org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_QR_CODE";
+
+}
diff --git a/OpenPGP-Keychain/build.gradle b/OpenPGP-Keychain/build.gradle
index 66c6a0e8f..28e8c37b1 100644
--- a/OpenPGP-Keychain/build.gradle
+++ b/OpenPGP-Keychain/build.gradle
@@ -20,7 +20,7 @@ android {
     buildToolsVersion "19.0.1"
 
     defaultConfig {
-        minSdkVersion 8
+        minSdkVersion 9
         targetSdkVersion 19
     }
 
diff --git a/OpenPGP-Keychain/src/main/AndroidManifest.xml b/OpenPGP-Keychain/src/main/AndroidManifest.xml
index 6de35571f..95f148686 100644
--- a/OpenPGP-Keychain/src/main/AndroidManifest.xml
+++ b/OpenPGP-Keychain/src/main/AndroidManifest.xml
@@ -30,7 +30,7 @@
     -->
 
     <uses-sdk
-        android:minSdkVersion="8"
+        android:minSdkVersion="9"
         android:targetSdkVersion="19" />
 
     <uses-feature
@@ -153,12 +153,19 @@
             android:windowSoftInputMode="stateHidden">
 
             <!-- Keychain's own Actions -->
+            <!-- ENCRYPT with text as extra -->
             <intent-filter>
                 <action android:name="org.sufficientlysecure.keychain.action.ENCRYPT" />
 
                 <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <!-- ENCRYPT with data Uri -->
+            <intent-filter>
+                <action android:name="org.sufficientlysecure.keychain.action.ENCRYPT" />
 
-                <data android:mimeType="*/*" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <!-- TODO: accept other schemes! -->
+                <data android:scheme="file" />
             </intent-filter>
             <!-- Android's Send Action -->
             <intent-filter android:label="@string/intent_send_encrypt">
@@ -176,12 +183,19 @@
             android:windowSoftInputMode="stateHidden">
 
             <!-- Keychain's own Actions -->
+            <!-- DECRYPT with text as extra -->
             <intent-filter>
                 <action android:name="org.sufficientlysecure.keychain.action.DECRYPT" />
 
                 <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <!-- DECRYPT with data Uri -->
+            <intent-filter>
+                <action android:name="org.sufficientlysecure.keychain.action.DECRYPT" />
 
-                <data android:mimeType="*/*" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <!-- TODO: accept other schemes! -->
+                <data android:scheme="file" />
             </intent-filter>
             <!-- Android's Send Action -->
             <intent-filter android:label="@string/intent_send_decrypt">
@@ -282,6 +296,7 @@
                 <data android:mimeType="application/pgp-keys" />
             </intent-filter>
             <!-- Keychain's own Actions -->
+            <!-- IMPORT_KEY with files TODO: does this work? -->
             <intent-filter android:label="@string/intent_import_key">
                 <action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY" />
 
@@ -289,11 +304,19 @@
 
                 <data android:mimeType="*/*" />
             </intent-filter>
-            <!-- IMPORT again without mimeType to also allow data only without filename -->
+            <!-- IMPORT_KEY with mimeType 'application/pgp-keys' -->
+            <intent-filter>
+                <action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <!-- mime type as defined in http://tools.ietf.org/html/rfc3156, section 7 -->
+                <data android:mimeType="application/pgp-keys" />
+            </intent-filter>
+            <!-- IMPORT_KEY without mimeType to allow import with extras Bundle -->
             <intent-filter android:label="@string/intent_import_key">
                 <action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY" />
                 <action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_QR_CODE" />
-		<action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_KEY_SERVER" />
+                <action android:name="org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_KEYSERVER" />
 
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
@@ -362,10 +385,9 @@
         <activity
             android:name="org.sufficientlysecure.keychain.service.remote.RemoteServiceActivity"
             android:exported="false"
-            android:label="@string/app_name"
-            android:launchMode="singleTop"
-            android:process=":remote_api"
-            android:taskAffinity=":remote_api" />
+            android:label="@string/app_name" />
+        <!--android:launchMode="singleTop"-->
+        <!--android:process=":remote_api"-->
         <activity
             android:name="org.sufficientlysecure.keychain.service.remote.RegisteredAppsListActivity"
             android:configChanges="orientation|screenSize|keyboardHidden|keyboard"
@@ -392,19 +414,19 @@
         </service>
 
         <!-- Extended Remote API -->
-        <service
-            android:name="org.sufficientlysecure.keychain.service.remote.ExtendedApiService"
-            android:enabled="true"
-            android:exported="true"
-            android:process=":remote_api">
-            <intent-filter>
-                <action android:name="org.sufficientlysecure.keychain.service.remote.IExtendedApiService" />
-            </intent-filter>
-
-            <meta-data
-                android:name="api_version"
-                android:value="1" />
-        </service>
+        <!--<service-->
+        <!--android:name="org.sufficientlysecure.keychain.service.remote.ExtendedApiService"-->
+        <!--android:enabled="true"-->
+        <!--android:exported="true"-->
+        <!--android:process=":remote_api">-->
+        <!--<intent-filter>-->
+        <!--<action android:name="org.sufficientlysecure.keychain.service.remote.IExtendedApiService" />-->
+        <!--</intent-filter>-->
+
+        <!--<meta-data-->
+        <!--android:name="api_version"-->
+        <!--android:value="1" />-->
+        <!--</service>-->
 
         <!-- TODO: authority! Make this API with content provider uris -->
         <!-- <provider -->
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java
index 870e45ea5..1de9ab985 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java
@@ -235,7 +235,7 @@ public class KeychainIntentService extends IntentService implements ProgressDial
 
         String action = intent.getAction();
 
-        // execute action from extra bundle
+        // executeServiceMethod action from extra bundle
         if (ACTION_ENCRYPT_SIGN.equals(action)) {
             try {
                 /* Input */
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/NoUserIdsException.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/NoUserIdsException.java
deleted file mode 100644
index 555303238..000000000
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/NoUserIdsException.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.sufficientlysecure.keychain.service.exception;
-
-public class NoUserIdsException extends Exception {
-
-    private static final long serialVersionUID = 7009311527126696207L;
-
-    public NoUserIdsException(String message) {
-        super(message);
-    }
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/UserInteractionRequiredException.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/UserInteractionRequiredException.java
deleted file mode 100644
index 1152d6796..000000000
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/UserInteractionRequiredException.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.sufficientlysecure.keychain.service.exception;
-
-public class UserInteractionRequiredException extends Exception {
-
-    private static final long serialVersionUID = -60128148603511936L;
-
-    public UserInteractionRequiredException(String message) {
-        super(message);
-    }
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/WrongPassphraseException.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/WrongPassphraseException.java
deleted file mode 100644
index 14b774eb5..000000000
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/WrongPassphraseException.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.sufficientlysecure.keychain.service.exception;
-
-public class WrongPassphraseException extends Exception {
-
-    private static final long serialVersionUID = -5309689232853485740L;
-
-    public WrongPassphraseException(String message) {
-        super(message);
-    }
-}
\ No newline at end of file
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/OpenPgpService.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/OpenPgpService.java
index 6db091ed0..31c5662dc 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/OpenPgpService.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/OpenPgpService.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,108 +17,46 @@
 
 package org.sufficientlysecure.keychain.service.remote;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.ArrayList;
-import java.util.regex.Matcher;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
 
-import org.openintents.openpgp.IOpenPgpCallback;
-import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
 import org.openintents.openpgp.IOpenPgpService;
-import org.openintents.openpgp.OpenPgpData;
 import org.openintents.openpgp.OpenPgpError;
 import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.util.OpenPgpConstants;
 import org.spongycastle.util.Arrays;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.Id;
-import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.helper.Preferences;
-import org.sufficientlysecure.keychain.pgp.PgpHelper;
 import org.sufficientlysecure.keychain.pgp.PgpOperation;
-import org.sufficientlysecure.keychain.pgp.exception.NoAsymmetricEncryptionException;
-import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
 import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.service.KeychainIntentService;
 import org.sufficientlysecure.keychain.service.PassphraseCacheService;
-import org.sufficientlysecure.keychain.service.exception.NoUserIdsException;
-import org.sufficientlysecure.keychain.service.exception.UserInteractionRequiredException;
-import org.sufficientlysecure.keychain.service.exception.WrongPassphraseException;
 import org.sufficientlysecure.keychain.util.InputData;
 import org.sufficientlysecure.keychain.util.Log;
 
-import android.content.Intent;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.Bundle;
-import android.os.IBinder;
-import android.os.Message;
-import android.os.RemoteException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
 
 public class OpenPgpService extends RemoteService {
 
-    private String getCachedPassphrase(long keyId, boolean allowUserInteraction)
-            throws UserInteractionRequiredException {
-        String passphrase = PassphraseCacheService.getCachedPassphrase(getContext(), keyId);
-
-        if (passphrase == null) {
-            if (!allowUserInteraction) {
-                throw new UserInteractionRequiredException(
-                        "Passphrase not found in cache, please enter your passphrase!");
-            }
-
-            Log.d(Constants.TAG, "No passphrase! Activity required!");
-
-            // start passphrase dialog
-            PassphraseActivityCallback callback = new PassphraseActivityCallback();
-            Bundle extras = new Bundle();
-            extras.putLong(RemoteServiceActivity.EXTRA_SECRET_KEY_ID, keyId);
-            pauseAndStartUserInteraction(RemoteServiceActivity.ACTION_CACHE_PASSPHRASE, callback,
-                    extras);
-
-            if (callback.isSuccess()) {
-                Log.d(Constants.TAG, "New passphrase entered!");
-
-                // get again after it was entered
-                passphrase = PassphraseCacheService.getCachedPassphrase(getContext(), keyId);
-            } else {
-                Log.d(Constants.TAG, "Passphrase dialog canceled!");
-
-                return null;
-            }
-
-        }
-
-        return passphrase;
-    }
-
-    public class PassphraseActivityCallback extends UserInputCallback {
+    private static final int PRIVATE_REQUEST_CODE_PASSPHRASE = 551;
+    private static final int PRIVATE_REQUEST_CODE_USER_IDS = 552;
 
-        private boolean success = false;
-
-        public boolean isSuccess() {
-            return success;
-        }
-
-        @Override
-        public void handleUserInput(Message msg) {
-            if (msg.arg1 == OKAY) {
-                success = true;
-            } else {
-                success = false;
-            }
-        }
-    };
 
     /**
      * Search database for key ids based on emails.
-     * 
+     *
      * @param encryptionUserIds
      * @return
      */
-    private long[] getKeyIdsFromEmails(String[] encryptionUserIds, boolean allowUserInteraction)
-            throws UserInteractionRequiredException {
+    private Bundle getKeyIdsFromEmails(Bundle params, String[] encryptionUserIds) {
         // find key ids to given emails in database
         ArrayList<Long> keyIds = new ArrayList<Long>();
 
@@ -152,96 +90,118 @@ public class OpenPgpService extends RemoteService {
         }
 
         // allow the user to verify pub key selection
-        if (allowUserInteraction && (missingUserIdsCheck || dublicateUserIdsCheck)) {
-            SelectPubKeysActivityCallback callback = new SelectPubKeysActivityCallback();
-
-            Bundle extras = new Bundle();
-            extras.putLongArray(RemoteServiceActivity.EXTRA_SELECTED_MASTER_KEY_IDS, keyIdsArray);
-            extras.putStringArrayList(RemoteServiceActivity.EXTRA_MISSING_USER_IDS, missingUserIds);
-            extras.putStringArrayList(RemoteServiceActivity.EXTRA_DUBLICATE_USER_IDS,
-                    dublicateUserIds);
-
-            pauseAndStartUserInteraction(RemoteServiceActivity.ACTION_SELECT_PUB_KEYS, callback,
-                    extras);
-
-            if (callback.isSuccess()) {
-                Log.d(Constants.TAG, "New selection of pub keys!");
-                keyIdsArray = callback.getPubKeyIds();
-            } else {
-                Log.d(Constants.TAG, "Pub key selection canceled!");
-                return null;
-            }
-        }
-
-        // if no user interaction is allow throw exceptions on duplicate or missing pub keys
-        if (!allowUserInteraction) {
-            if (missingUserIdsCheck)
-                throw new UserInteractionRequiredException(
-                        "Pub keys for these user ids are missing:" + missingUserIds.toString());
-            if (dublicateUserIdsCheck)
-                throw new UserInteractionRequiredException(
-                        "More than one pub key with these user ids exist:"
-                                + dublicateUserIds.toString());
+        if (missingUserIdsCheck || dublicateUserIdsCheck) {
+            // build PendingIntent for passphrase input
+            Intent intent = new Intent(getBaseContext(), RemoteServiceActivity.class);
+            intent.setAction(RemoteServiceActivity.ACTION_SELECT_PUB_KEYS);
+            intent.putExtra(RemoteServiceActivity.EXTRA_SELECTED_MASTER_KEY_IDS, keyIdsArray);
+            intent.putExtra(RemoteServiceActivity.EXTRA_MISSING_USER_IDS, missingUserIds);
+            intent.putExtra(RemoteServiceActivity.EXTRA_DUBLICATE_USER_IDS, dublicateUserIds);
+            intent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+
+            PendingIntent pi = PendingIntent.getActivity(getBaseContext(), PRIVATE_REQUEST_CODE_USER_IDS, intent, 0);
+
+            // return PendingIntent to be executed by client
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED);
+            result.putParcelable(OpenPgpConstants.RESULT_INTENT, pi);
+
+            return result;
         }
 
         if (keyIdsArray.length == 0) {
             return null;
         }
-        return keyIdsArray;
+
+        Bundle result = new Bundle();
+        result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_SUCCESS);
+        result.putLongArray(OpenPgpConstants.PARAMS_KEY_IDS, keyIdsArray);
+        return result;
     }
 
-    public class SelectPubKeysActivityCallback extends UserInputCallback {
-        public static final String PUB_KEY_IDS = "pub_key_ids";
+    private Bundle getPassphraseBundleIntent(Bundle params, long keyId) {
+        // build PendingIntent for passphrase input
+        Intent intent = new Intent(getBaseContext(), RemoteServiceActivity.class);
+        intent.setAction(RemoteServiceActivity.ACTION_CACHE_PASSPHRASE);
+        intent.putExtra(RemoteServiceActivity.EXTRA_SECRET_KEY_ID, keyId);
+        // pass params through to activity that it can be returned again later to repeat pgp operation
+        intent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+        PendingIntent pi = PendingIntent.getActivity(getBaseContext(), PRIVATE_REQUEST_CODE_PASSPHRASE, intent, 0);
+
+        // return PendingIntent to be executed by client
+        Bundle result = new Bundle();
+        result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED);
+        result.putParcelable(OpenPgpConstants.RESULT_INTENT, pi);
+
+        return result;
+    }
 
-        private boolean success = false;
-        private long[] pubKeyIds;
 
-        public boolean isSuccess() {
-            return success;
-        }
-
-        public long[] getPubKeyIds() {
-            return pubKeyIds;
-        }
-
-        @Override
-        public void handleUserInput(Message msg) {
-            if (msg.arg1 == OKAY) {
-                success = true;
-                pubKeyIds = msg.getData().getLongArray(PUB_KEY_IDS);
+    // TODO: asciiArmor?!
+    private Bundle signImpl(Bundle params, ParcelFileDescriptor input, ParcelFileDescriptor output,
+                            AppSettings appSettings) {
+        try {
+            // get passphrase from cache, if key has "no" passphrase, this returns an empty String
+            String passphrase;
+            if (params.containsKey(OpenPgpConstants.PARAMS_PASSPHRASE)) {
+                passphrase = params.getString(OpenPgpConstants.PARAMS_PASSPHRASE);
             } else {
-                success = false;
+                passphrase = PassphraseCacheService.getCachedPassphrase(getContext(), appSettings.getKeyId());
+            }
+            if (passphrase == null) {
+                // get PendingIntent for passphrase input, add it to given params and return to client
+                Bundle passphraseBundle = getPassphraseBundleIntent(params, appSettings.getKeyId());
+                return passphraseBundle;
             }
-        }
-    };
 
-    private synchronized void getKeyIdsSafe(String[] userIds, boolean allowUserInteraction,
-            IOpenPgpKeyIdsCallback callback, AppSettings appSettings) {
-        try {
-            long[] keyIds = getKeyIdsFromEmails(userIds, allowUserInteraction);
-            if (keyIds == null) {
-                throw new NoUserIdsException("No user ids!");
+            // Get Input- and OutputStream from ParcelFileDescriptor
+            InputStream is = new ParcelFileDescriptor.AutoCloseInputStream(input);
+            OutputStream os = new ParcelFileDescriptor.AutoCloseOutputStream(output);
+            try {
+                long inputLength = is.available();
+                InputData inputData = new InputData(is, inputLength);
+
+                PgpOperation operation = new PgpOperation(getContext(), null, inputData, os);
+                operation.signText(appSettings.getKeyId(), passphrase, appSettings.getHashAlgorithm(),
+                        Preferences.getPreferences(this).getForceV3Signatures());
+            } finally {
+                is.close();
+                os.close();
             }
 
-            callback.onSuccess(keyIds);
-        } catch (UserInteractionRequiredException e) {
-            callbackOpenPgpError(callback, OpenPgpError.USER_INTERACTION_REQUIRED, e.getMessage());
-        } catch (NoUserIdsException e) {
-            callbackOpenPgpError(callback, OpenPgpError.NO_USER_IDS, e.getMessage());
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_SUCCESS);
+            return result;
         } catch (Exception e) {
-            callbackOpenPgpError(callback, OpenPgpError.GENERIC_ERROR, e.getMessage());
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                    new OpenPgpError(OpenPgpError.GENERIC_ERROR, e.getMessage()));
+            return result;
         }
     }
 
-    private synchronized void encryptAndSignSafe(OpenPgpData inputData,
-            final OpenPgpData outputData, long[] keyIds, boolean allowUserInteraction,
-            IOpenPgpCallback callback, AppSettings appSettings, boolean sign) {
+    private Bundle encryptAndSignImpl(Bundle params, ParcelFileDescriptor input,
+                                      ParcelFileDescriptor output, AppSettings appSettings,
+                                      boolean sign) {
         try {
-            // TODO: other options of OpenPgpData!
-            byte[] inputBytes = getInput(inputData);
-            boolean asciiArmor = false;
-            if (outputData.getType() == OpenPgpData.TYPE_STRING) {
-                asciiArmor = true;
+            boolean asciiArmor = params.getBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, false);
+
+            long[] keyIds;
+            if (params.containsKey(OpenPgpConstants.PARAMS_KEY_IDS)) {
+                keyIds = params.getLongArray(OpenPgpConstants.PARAMS_KEY_IDS);
+            } else {
+                // get key ids based on given user ids
+                String[] userIds = params.getStringArray(OpenPgpConstants.PARAMS_USER_IDS);
+                // give params through to activity...
+                Bundle result = getKeyIdsFromEmails(params, userIds);
+
+                if (result.getInt(OpenPgpConstants.RESULT_CODE, 0) == OpenPgpConstants.RESULT_CODE_SUCCESS) {
+                    keyIds = result.getLongArray(OpenPgpConstants.PARAMS_KEY_IDS);
+                } else {
+                    // if not success -> result contains a PendingIntent for user interaction
+                    return result;
+                }
             }
 
             // add own key for encryption
@@ -249,349 +209,319 @@ public class OpenPgpService extends RemoteService {
             keyIds[keyIds.length - 1] = appSettings.getKeyId();
 
             // build InputData and write into OutputStream
-            InputStream inputStream = new ByteArrayInputStream(inputBytes);
-            long inputLength = inputBytes.length;
-            InputData inputDt = new InputData(inputStream, inputLength);
-
-            OutputStream outputStream = new ByteArrayOutputStream();
+            // Get Input- and OutputStream from ParcelFileDescriptor
+            InputStream is = new ParcelFileDescriptor.AutoCloseInputStream(input);
+            OutputStream os = new ParcelFileDescriptor.AutoCloseOutputStream(output);
+            try {
+                long inputLength = is.available();
+                InputData inputData = new InputData(is, inputLength);
+
+                PgpOperation operation = new PgpOperation(getContext(), null, inputData, os);
+                if (sign) {
+                    String passphrase;
+                    if (params.containsKey(OpenPgpConstants.PARAMS_PASSPHRASE)) {
+                        passphrase = params.getString(OpenPgpConstants.PARAMS_PASSPHRASE);
+                    } else {
+                        passphrase = PassphraseCacheService.getCachedPassphrase(getContext(),
+                                appSettings.getKeyId());
+                    }
+                    if (passphrase == null) {
+                        // get PendingIntent for passphrase input, add it to given params and return to client
+                        Bundle passphraseBundle = getPassphraseBundleIntent(params, appSettings.getKeyId());
+                        return passphraseBundle;
+                    }
 
-            PgpOperation operation = new PgpOperation(getContext(), null, inputDt, outputStream);
-            if (sign) {
-                String passphrase = getCachedPassphrase(appSettings.getKeyId(),
-                        allowUserInteraction);
-                if (passphrase == null) {
-                    throw new WrongPassphraseException("No or wrong passphrase!");
+                    operation.signAndEncrypt(asciiArmor, appSettings.getCompression(), keyIds, null,
+                            appSettings.getEncryptionAlgorithm(), appSettings.getKeyId(),
+                            appSettings.getHashAlgorithm(), true, passphrase);
+                } else {
+                    operation.signAndEncrypt(asciiArmor, appSettings.getCompression(), keyIds, null,
+                            appSettings.getEncryptionAlgorithm(), Id.key.none,
+                            appSettings.getHashAlgorithm(), true, null);
                 }
-
-                operation.signAndEncrypt(asciiArmor, appSettings.getCompression(), keyIds, null,
-                        appSettings.getEncryptionAlgorithm(), appSettings.getKeyId(),
-                        appSettings.getHashAlgorithm(), true, passphrase);
-            } else {
-                operation.signAndEncrypt(asciiArmor, appSettings.getCompression(), keyIds, null,
-                        appSettings.getEncryptionAlgorithm(), Id.key.none,
-                        appSettings.getHashAlgorithm(), true, null);
+            } finally {
+                is.close();
+                os.close();
             }
 
-            outputStream.close();
-
-            byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
-
-            OpenPgpData output = null;
-            if (asciiArmor) {
-                output = new OpenPgpData(new String(outputBytes));
-            } else {
-                output = new OpenPgpData(outputBytes);
-            }
-
-            // return over handler on client side
-            callback.onSuccess(output, null);
-        } catch (UserInteractionRequiredException e) {
-            callbackOpenPgpError(callback, OpenPgpError.USER_INTERACTION_REQUIRED, e.getMessage());
-        } catch (WrongPassphraseException e) {
-            callbackOpenPgpError(callback, OpenPgpError.NO_OR_WRONG_PASSPHRASE, e.getMessage());
-        } catch (Exception e) {
-            callbackOpenPgpError(callback, OpenPgpError.GENERIC_ERROR, e.getMessage());
-        }
-    }
-
-    // TODO: asciiArmor?!
-    private void signSafe(byte[] inputBytes, boolean allowUserInteraction,
-            IOpenPgpCallback callback, AppSettings appSettings) {
-        try {
-            // build InputData and write into OutputStream
-            InputStream inputStream = new ByteArrayInputStream(inputBytes);
-            long inputLength = inputBytes.length;
-            InputData inputData = new InputData(inputStream, inputLength);
-
-            OutputStream outputStream = new ByteArrayOutputStream();
-
-            String passphrase = getCachedPassphrase(appSettings.getKeyId(), allowUserInteraction);
-            if (passphrase == null) {
-                throw new WrongPassphraseException("No or wrong passphrase!");
-            }
-
-            PgpOperation operation = new PgpOperation(getContext(), null, inputData, outputStream);
-            operation.signText(appSettings.getKeyId(), passphrase, appSettings.getHashAlgorithm(),
-                    Preferences.getPreferences(this).getForceV3Signatures());
-
-            outputStream.close();
-
-            byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
-            OpenPgpData output = new OpenPgpData(new String(outputBytes));
-
-            // return over handler on client side
-            callback.onSuccess(output, null);
-        } catch (UserInteractionRequiredException e) {
-            callbackOpenPgpError(callback, OpenPgpError.USER_INTERACTION_REQUIRED, e.getMessage());
-        } catch (WrongPassphraseException e) {
-            callbackOpenPgpError(callback, OpenPgpError.NO_OR_WRONG_PASSPHRASE, e.getMessage());
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_SUCCESS);
+            return result;
         } catch (Exception e) {
-            callbackOpenPgpError(callback, OpenPgpError.GENERIC_ERROR, e.getMessage());
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                    new OpenPgpError(OpenPgpError.GENERIC_ERROR, e.getMessage()));
+            return result;
         }
     }
 
-    private synchronized void decryptAndVerifySafe(byte[] inputBytes, boolean allowUserInteraction,
-            IOpenPgpCallback callback, AppSettings appSettings) {
+    private Bundle decryptAndVerifyImpl(Bundle params, ParcelFileDescriptor input,
+                                        ParcelFileDescriptor output, AppSettings appSettings) {
         try {
-            // TODO: this is not really needed
-            // checked if it is text with BEGIN and END tags
-            String message = new String(inputBytes);
-            Log.d(Constants.TAG, "in: " + message);
-            boolean signedOnly = false;
-            Matcher matcher = PgpHelper.PGP_MESSAGE.matcher(message);
-            if (matcher.matches()) {
-                Log.d(Constants.TAG, "PGP_MESSAGE matched");
-                message = matcher.group(1);
-                // replace non breakable spaces
-                message = message.replaceAll("\\xa0", " ");
-
-                // overwrite inputBytes
-                inputBytes = message.getBytes();
-            } else {
-                matcher = PgpHelper.PGP_SIGNED_MESSAGE.matcher(message);
-                if (matcher.matches()) {
-                    signedOnly = true;
-                    Log.d(Constants.TAG, "PGP_SIGNED_MESSAGE matched");
-                    message = matcher.group(1);
-                    // replace non breakable spaces
-                    message = message.replaceAll("\\xa0", " ");
-
-                    // overwrite inputBytes
-                    inputBytes = message.getBytes();
+            // Get Input- and OutputStream from ParcelFileDescriptor
+            InputStream is = new ParcelFileDescriptor.AutoCloseInputStream(input);
+            OutputStream os = new ParcelFileDescriptor.AutoCloseOutputStream(output);
+            OpenPgpSignatureResult sigResult = null;
+            try {
+
+
+                // TODOs API 2.0:
+                // implement verify-only!
+                // fix the mess: http://stackoverflow.com/questions/148130/how-do-i-peek-at-the-first-two-bytes-in-an-inputstream
+                // should we allow to decrypt everything under every key id or only the one set?
+                // TODO: instead of trying to get the passphrase before
+                // pause stream when passphrase is missing and then resume
+
+
+                // TODO: this is not really needed
+                // checked if it is text with BEGIN and END tags
+//            String message = new String(inputBytes);
+//            Log.d(Constants.TAG, "in: " + message);
+                boolean signedOnly = false;
+//            Matcher matcher = PgpHelper.PGP_MESSAGE.matcher(message);
+//            if (matcher.matches()) {
+//                Log.d(Constants.TAG, "PGP_MESSAGE matched");
+//                message = matcher.group(1);
+//                // replace non breakable spaces
+//                message = message.replaceAll("\\xa0", " ");
+//
+//                // overwrite inputBytes
+//                inputBytes = message.getBytes();
+//            } else {
+//                matcher = PgpHelper.PGP_SIGNED_MESSAGE.matcher(message);
+//                if (matcher.matches()) {
+//                    signedOnly = true;
+//                    Log.d(Constants.TAG, "PGP_SIGNED_MESSAGE matched");
+//                    message = matcher.group(1);
+//                    // replace non breakable spaces
+//                    message = message.replaceAll("\\xa0", " ");
+//
+//                    // overwrite inputBytes
+//                    inputBytes = message.getBytes();
+//                } else {
+//                    Log.d(Constants.TAG, "Nothing matched! Binary?");
+//                }
+//            }
+                // END TODO
+
+//            Log.d(Constants.TAG, "in: " + new String(inputBytes));
+
+                // TODO: This allows to decrypt messages with ALL secret keys, not only the one for the
+                // app, Fix this?
+
+//                String passphrase = null;
+//                if (!signedOnly) {
+//                    // BEGIN Get key
+//                    // TODO: this input stream is consumed after PgpMain.getDecryptionKeyId()... do it
+//                    // better!
+//                    InputStream inputStream2 = new ByteArrayInputStream(inputBytes);
+//
+//                    // TODO: duplicates functions from DecryptActivity!
+//                    long secretKeyId;
+//                    try {
+//                        if (inputStream2.markSupported()) {
+//                            // should probably set this to the max size of two
+//                            // pgpF objects, if it even needs to be anything other
+//                            // than 0.
+//                            inputStream2.mark(200);
+//                        }
+//                        secretKeyId = PgpHelper.getDecryptionKeyId(this, inputStream2);
+//                        if (secretKeyId == Id.key.none) {
+//                            throw new PgpGeneralException(getString(R.string.error_no_secret_key_found));
+//                        }
+//                    } catch (NoAsymmetricEncryptionException e) {
+//                        if (inputStream2.markSupported()) {
+//                            inputStream2.reset();
+//                        }
+//                        secretKeyId = Id.key.symmetric;
+//                        if (!PgpOperation.hasSymmetricEncryption(this, inputStream2)) {
+//                            throw new PgpGeneralException(
+//                                    getString(R.string.error_no_known_encryption_found));
+//                        }
+//                        // we do not support symmetric decryption from the API!
+//                        throw new Exception("Symmetric decryption is not supported!");
+//                    }
+//
+//                    Log.d(Constants.TAG, "secretKeyId " + secretKeyId);
+
+                // NOTE: currently this only gets the passphrase for the saved key
+                String passphrase;
+                if (params.containsKey(OpenPgpConstants.PARAMS_PASSPHRASE)) {
+                    passphrase = params.getString(OpenPgpConstants.PARAMS_PASSPHRASE);
                 } else {
-                    Log.d(Constants.TAG, "Nothing matched! Binary?");
+                    passphrase = PassphraseCacheService.getCachedPassphrase(getContext(), appSettings.getKeyId());
                 }
-            }
-            // END TODO
-
-            Log.d(Constants.TAG, "in: " + new String(inputBytes));
-
-            // TODO: This allows to decrypt messages with ALL secret keys, not only the one for the
-            // app, Fix this?
-
-            String passphrase = null;
-            if (!signedOnly) {
-                // BEGIN Get key
-                // TODO: this input stream is consumed after PgpMain.getDecryptionKeyId()... do it
-                // better!
-                InputStream inputStream2 = new ByteArrayInputStream(inputBytes);
-
-                // TODO: duplicates functions from DecryptActivity!
-                long secretKeyId;
-                try {
-                    if (inputStream2.markSupported()) {
-                        // should probably set this to the max size of two
-                        // pgpF objects, if it even needs to be anything other
-                        // than 0.
-                        inputStream2.mark(200);
-                    }
-                    secretKeyId = PgpHelper.getDecryptionKeyId(this, inputStream2);
-                    if (secretKeyId == Id.key.none) {
-                        throw new PgpGeneralException(getString(R.string.error_no_secret_key_found));
-                    }
-                } catch (NoAsymmetricEncryptionException e) {
-                    if (inputStream2.markSupported()) {
-                        inputStream2.reset();
-                    }
-                    secretKeyId = Id.key.symmetric;
-                    if (!PgpOperation.hasSymmetricEncryption(this, inputStream2)) {
-                        throw new PgpGeneralException(
-                                getString(R.string.error_no_known_encryption_found));
-                    }
-                    // we do not support symmetric decryption from the API!
-                    throw new Exception("Symmetric decryption is not supported!");
+                if (passphrase == null) {
+                    // get PendingIntent for passphrase input, add it to given params and return to client
+                    Bundle passphraseBundle = getPassphraseBundleIntent(params, appSettings.getKeyId());
+                    return passphraseBundle;
                 }
+//                }
 
-                Log.d(Constants.TAG, "secretKeyId " + secretKeyId);
+                // build InputData and write into OutputStream
+                long inputLength = is.available();
+                InputData inputData = new InputData(is, inputLength);
 
-                passphrase = getCachedPassphrase(secretKeyId, allowUserInteraction);
-                if (passphrase == null) {
-                    throw new WrongPassphraseException("No or wrong passphrase!");
-                }
-            }
 
-            // build InputData and write into OutputStream
-            InputStream inputStream = new ByteArrayInputStream(inputBytes);
-            long inputLength = inputBytes.length;
-            InputData inputData = new InputData(inputStream, inputLength);
+                Bundle outputBundle;
+                PgpOperation operation = new PgpOperation(getContext(), null, inputData, os);
+                if (signedOnly) {
+                    outputBundle = operation.verifyText();
+                } else {
+                    // BIG TODO: instead of trying to get the passphrase before
+                    // pause stream when passphrase is missing and then resume
+                    outputBundle = operation.decryptAndVerify(passphrase, false);
+                }
 
-            OutputStream outputStream = new ByteArrayOutputStream();
+//                outputStream.close();
 
-            Bundle outputBundle;
-            PgpOperation operation = new PgpOperation(getContext(), null, inputData, outputStream);
-            if (signedOnly) {
-                outputBundle = operation.verifyText();
-            } else {
-                outputBundle = operation.decryptAndVerify(passphrase, false);
-            }
+//                byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
 
-            outputStream.close();
+                // get signature informations from bundle
+                boolean signature = outputBundle.getBoolean(KeychainIntentService.RESULT_SIGNATURE);
 
-            byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
+                if (signature) {
+                    long signatureKeyId = outputBundle
+                            .getLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID);
+                    String signatureUserId = outputBundle
+                            .getString(KeychainIntentService.RESULT_SIGNATURE_USER_ID);
+                    boolean signatureSuccess = outputBundle
+                            .getBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS);
+                    boolean signatureUnknown = outputBundle
+                            .getBoolean(KeychainIntentService.RESULT_SIGNATURE_UNKNOWN);
 
-            // get signature informations from bundle
-            boolean signature = outputBundle.getBoolean(KeychainIntentService.RESULT_SIGNATURE);
+                    int signatureStatus = OpenPgpSignatureResult.SIGNATURE_ERROR;
+                    if (signatureSuccess) {
+                        signatureStatus = OpenPgpSignatureResult.SIGNATURE_SUCCESS_CERTIFIED;
+                    } else if (signatureUnknown) {
+                        signatureStatus = OpenPgpSignatureResult.SIGNATURE_UNKNOWN_PUB_KEY;
+                    }
 
-            OpenPgpSignatureResult sigResult = null;
-            if (signature) {
-                long signatureKeyId = outputBundle
-                        .getLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID);
-                String signatureUserId = outputBundle
-                        .getString(KeychainIntentService.RESULT_SIGNATURE_USER_ID);
-                boolean signatureSuccess = outputBundle
-                        .getBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS);
-                boolean signatureUnknown = outputBundle
-                        .getBoolean(KeychainIntentService.RESULT_SIGNATURE_UNKNOWN);
-
-                int signatureStatus = OpenPgpSignatureResult.SIGNATURE_ERROR;
-                if (signatureSuccess) {
-                    signatureStatus = OpenPgpSignatureResult.SIGNATURE_SUCCESS_TRUSTED;
-                } else if (signatureUnknown) {
-                    signatureStatus = OpenPgpSignatureResult.SIGNATURE_UNKNOWN_PUB_KEY;
+                    sigResult = new OpenPgpSignatureResult(signatureStatus, signatureUserId,
+                            signedOnly, signatureKeyId);
                 }
-
-                sigResult = new OpenPgpSignatureResult(signatureStatus, signatureUserId,
-                        signedOnly, signatureKeyId);
+            } finally {
+                is.close();
+                os.close();
             }
-            OpenPgpData output = new OpenPgpData(new String(outputBytes));
-
-            // return over handler on client side
-            callback.onSuccess(output, sigResult);
-        } catch (UserInteractionRequiredException e) {
-            callbackOpenPgpError(callback, OpenPgpError.USER_INTERACTION_REQUIRED, e.getMessage());
-        } catch (WrongPassphraseException e) {
-            callbackOpenPgpError(callback, OpenPgpError.NO_OR_WRONG_PASSPHRASE, e.getMessage());
+
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_SUCCESS);
+            result.putParcelable(OpenPgpConstants.RESULT_SIGNATURE, sigResult);
+            return result;
         } catch (Exception e) {
-            callbackOpenPgpError(callback, OpenPgpError.GENERIC_ERROR, e.getMessage());
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                    new OpenPgpError(OpenPgpError.GENERIC_ERROR, e.getMessage()));
+            return result;
         }
     }
 
+    private Bundle getKeyIdsImpl(Bundle params) {
+        // get key ids based on given user ids
+        String[] userIds = params.getStringArray(OpenPgpConstants.PARAMS_USER_IDS);
+        Bundle result = getKeyIdsFromEmails(params, userIds);
+        return result;
+    }
+
     /**
-     * Returns error to IOpenPgpCallback
-     * 
-     * @param callback
-     * @param errorId
-     * @param message
+     * Checks that params != null and API version fits
+     *
+     * @param params
+     * @return
      */
-    private void callbackOpenPgpError(IOpenPgpCallback callback, int errorId, String message) {
-        try {
-            callback.onError(new OpenPgpError(0, message));
-        } catch (Exception t) {
-            Log.e(Constants.TAG,
-                    "Exception while returning OpenPgpError to client via callback.onError()", t);
+    private Bundle checkRequirements(Bundle params) {
+        // params Bundle is required!
+        if (params == null) {
+            Bundle result = new Bundle();
+            OpenPgpError error = new OpenPgpError(OpenPgpError.GENERIC_ERROR, "params Bundle required!");
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS, error);
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            return result;
         }
-    }
 
-    private void callbackOpenPgpError(IOpenPgpKeyIdsCallback callback, int errorId, String message) {
-        try {
-            callback.onError(new OpenPgpError(0, message));
-        } catch (Exception t) {
-            Log.e(Constants.TAG,
-                    "Exception while returning OpenPgpError to client via callback.onError()", t);
+        // version code is required and needs to correspond to version code of service!
+        if (params.getInt(OpenPgpConstants.PARAMS_API_VERSION) != OpenPgpConstants.API_VERSION) {
+            Bundle result = new Bundle();
+            OpenPgpError error = new OpenPgpError(OpenPgpError.INCOMPATIBLE_API_VERSIONS, "Incompatible API versions!");
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS, error);
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            return result;
         }
+
+        // check if caller is allowed to access openpgp keychain
+        Bundle result = isAllowed(params);
+        if (result != null) {
+            return result;
+        }
+
+        return null;
     }
 
+    // TODO: multi-threading
     private final IOpenPgpService.Stub mBinder = new IOpenPgpService.Stub() {
 
         @Override
-        public void encrypt(final OpenPgpData input, final OpenPgpData output, final long[] keyIds,
-                final IOpenPgpCallback callback) throws RemoteException {
-            final AppSettings settings = getAppSettings();
-
-            Runnable r = new Runnable() {
-                @Override
-                public void run() {
-                    encryptAndSignSafe(input, output, keyIds, true, callback, settings, false);
-                }
-            };
+        public Bundle sign(Bundle params, final ParcelFileDescriptor input, final ParcelFileDescriptor output) {
+            final AppSettings appSettings = getAppSettings();
 
-            checkAndEnqueue(r);
-        }
-
-        @Override
-        public void signAndEncrypt(final OpenPgpData input, final OpenPgpData output,
-                final long[] keyIds, final IOpenPgpCallback callback) throws RemoteException {
-            final AppSettings settings = getAppSettings();
-
-            Runnable r = new Runnable() {
-                @Override
-                public void run() {
-                    encryptAndSignSafe(input, output, keyIds, true, callback, settings, true);
-                }
-            };
+            Bundle errorResult = checkRequirements(params);
+            if (errorResult != null) {
+                return errorResult;
+            }
 
-            checkAndEnqueue(r);
+            return signImpl(params, input, output, appSettings);
         }
 
         @Override
-        public void sign(final OpenPgpData input, final OpenPgpData output,
-                final IOpenPgpCallback callback) throws RemoteException {
-            final AppSettings settings = getAppSettings();
-
-            Runnable r = new Runnable() {
-                @Override
-                public void run() {
-                    signSafe(getInput(input), true, callback, settings);
-                }
-            };
+        public Bundle encrypt(Bundle params, ParcelFileDescriptor input, ParcelFileDescriptor output) {
+            final AppSettings appSettings = getAppSettings();
+
+            Bundle errorResult = checkRequirements(params);
+            if (errorResult != null) {
+                return errorResult;
+            }
 
-            checkAndEnqueue(r);
+            return encryptAndSignImpl(params, input, output, appSettings, false);
         }
 
         @Override
-        public void decryptAndVerify(final OpenPgpData input, final OpenPgpData output,
-                final IOpenPgpCallback callback) throws RemoteException {
+        public Bundle signAndEncrypt(Bundle params, ParcelFileDescriptor input, ParcelFileDescriptor output) {
+            final AppSettings appSettings = getAppSettings();
 
-            final AppSettings settings = getAppSettings();
-
-            Runnable r = new Runnable() {
-                @Override
-                public void run() {
-                    decryptAndVerifySafe(getInput(input), true, callback, settings);
-                }
-            };
+            Bundle errorResult = checkRequirements(params);
+            if (errorResult != null) {
+                return errorResult;
+            }
 
-            checkAndEnqueue(r);
+            return encryptAndSignImpl(params, input, output, appSettings, true);
         }
 
         @Override
-        public void getKeyIds(final String[] userIds, final boolean allowUserInteraction,
-                final IOpenPgpKeyIdsCallback callback) throws RemoteException {
-
-            final AppSettings settings = getAppSettings();
+        public Bundle decryptAndVerify(Bundle params, ParcelFileDescriptor input, ParcelFileDescriptor output) {
+            final AppSettings appSettings = getAppSettings();
 
-            Runnable r = new Runnable() {
-                @Override
-                public void run() {
-                    getKeyIdsSafe(userIds, allowUserInteraction, callback, settings);
-                }
-            };
+            Bundle errorResult = checkRequirements(params);
+            if (errorResult != null) {
+                return errorResult;
+            }
 
-            checkAndEnqueue(r);
+            return decryptAndVerifyImpl(params, input, output, appSettings);
         }
 
-    };
-
-    private static byte[] getInput(OpenPgpData data) {
-        // TODO: support Uri and ParcelFileDescriptor
-
-        byte[] inBytes = null;
-        switch (data.getType()) {
-        case OpenPgpData.TYPE_STRING:
-            inBytes = data.getString().getBytes();
-            break;
-
-        case OpenPgpData.TYPE_BYTE_ARRAY:
-            inBytes = data.getBytes();
-            break;
+        @Override
+        public Bundle getKeyIds(Bundle params) {
+            Bundle errorResult = checkRequirements(params);
+            if (errorResult != null) {
+                return errorResult;
+            }
 
-        default:
-            Log.e(Constants.TAG, "Uri and ParcelFileDescriptor not supported right now!");
-            break;
+            return getKeyIdsImpl(params);
         }
 
-        return inBytes;
-    }
+    };
 
     @Override
     public IBinder onBind(Intent intent) {
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteService.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteService.java
index bc513d532..cfd2b9ec3 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteService.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteService.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,17 +19,16 @@ package org.sufficientlysecure.keychain.service.remote;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.concurrent.ArrayBlockingQueue;
-import java.util.concurrent.TimeUnit;
 
+import org.openintents.openpgp.OpenPgpError;
+import org.openintents.openpgp.util.OpenPgpConstants;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.provider.KeychainContract;
 import org.sufficientlysecure.keychain.provider.ProviderHelper;
-import org.sufficientlysecure.keychain.service.exception.WrongPackageSignatureException;
 import org.sufficientlysecure.keychain.util.Log;
-import org.sufficientlysecure.keychain.util.PausableThreadPoolExecutor;
 
+import android.app.PendingIntent;
 import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
@@ -50,66 +49,19 @@ import android.os.Messenger;
 public abstract class RemoteService extends Service {
     Context mContext;
 
-    private final ArrayBlockingQueue<Runnable> mPoolQueue = new ArrayBlockingQueue<Runnable>(100);
-    // TODO: Are these parameters okay?
-    private PausableThreadPoolExecutor mThreadPool = new PausableThreadPoolExecutor(2, 4, 10,
-            TimeUnit.SECONDS, mPoolQueue);
+    private static final int PRIVATE_REQUEST_CODE_REGISTER = 651;
+    private static final int PRIVATE_REQUEST_CODE_ERROR = 652;
 
-    private final Object userInputLock = new Object();
-
-    /**
-     * Override handleUserInput() to handle OKAY (1) and CANCEL (0). After handling the waiting
-     * threads will be notified and the queue resumed
-     */
-    protected class UserInputCallback extends BaseCallback {
-
-        public void handleUserInput(Message msg) {
-        }
-
-        @Override
-        public boolean handleMessage(Message msg) {
-            handleUserInput(msg);
-
-            // resume
-            synchronized (userInputLock) {
-                userInputLock.notifyAll();
-            }
-            mThreadPool.resume();
-            return true;
-        }
-
-    }
-
-    /**
-     * Extends Handler.Callback with OKAY (1), CANCEL (0) variables
-     */
-    private class BaseCallback implements Handler.Callback {
-        public static final int OKAY = 1;
-        public static final int CANCEL = 0;
-
-        @Override
-        public boolean handleMessage(Message msg) {
-            return false;
-        }
-
-    }
 
     public Context getContext() {
         return mContext;
     }
 
-    /**
-     * Should be used from Stub implementations of AIDL interfaces to enqueue a runnable for
-     * execution
-     * 
-     * @param r
-     */
-    protected void checkAndEnqueue(Runnable r) {
+    protected Bundle isAllowed(Bundle params) {
         try {
             if (isCallerAllowed(false)) {
-                mThreadPool.execute(r);
 
-                Log.d(Constants.TAG, "Enqueued runnable…");
+                return null;
             } else {
                 String[] callingPackages = getPackageManager().getPackagesForUid(
                         Binder.getCallingUid());
@@ -121,32 +73,46 @@ public abstract class RemoteService extends Service {
                     packageSignature = getPackageSignature(packageName);
                 } catch (NameNotFoundException e) {
                     Log.e(Constants.TAG, "Should not happen, returning!", e);
-                    return;
-                }
-                Log.e(Constants.TAG,
-                        "Not allowed to use service! Starting activity for registration!");
-                Bundle extras = new Bundle();
-                extras.putString(RemoteServiceActivity.EXTRA_PACKAGE_NAME, packageName);
-                extras.putByteArray(RemoteServiceActivity.EXTRA_PACKAGE_SIGNATURE, packageSignature);
-                RegisterActivityCallback callback = new RegisterActivityCallback();
-
-                pauseAndStartUserInteraction(RemoteServiceActivity.ACTION_REGISTER, callback,
-                        extras);
-
-                if (callback.isAllowed()) {
-                    mThreadPool.execute(r);
-                    Log.d(Constants.TAG, "Enqueued runnable…");
-                } else {
-                    Log.d(Constants.TAG, "User disallowed app!");
+                    // return error
+                    Bundle result = new Bundle();
+                    result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+                    result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                            new OpenPgpError(OpenPgpError.GENERIC_ERROR, e.getMessage()));
+                    return result;
                 }
+                Log.e(Constants.TAG, "Not allowed to use service! return PendingIntent for registration!");
+
+                Intent intent = new Intent(getBaseContext(), RemoteServiceActivity.class);
+                intent.setAction(RemoteServiceActivity.ACTION_REGISTER);
+                intent.putExtra(RemoteServiceActivity.EXTRA_PACKAGE_NAME, packageName);
+                intent.putExtra(RemoteServiceActivity.EXTRA_PACKAGE_SIGNATURE, packageSignature);
+                intent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+
+                PendingIntent pi = PendingIntent.getActivity(getBaseContext(), PRIVATE_REQUEST_CODE_REGISTER, intent, 0);
+
+                // return PendingIntent to be executed by client
+                Bundle result = new Bundle();
+                result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED);
+                result.putParcelable(OpenPgpConstants.RESULT_INTENT, pi);
+
+                return result;
             }
         } catch (WrongPackageSignatureException e) {
-            Log.e(Constants.TAG, e.getMessage());
+            Log.e(Constants.TAG, "wrong signature!", e);
+
+            Intent intent = new Intent(getBaseContext(), RemoteServiceActivity.class);
+            intent.setAction(RemoteServiceActivity.ACTION_ERROR_MESSAGE);
+            intent.putExtra(RemoteServiceActivity.EXTRA_ERROR_MESSAGE, getString(R.string.api_error_wrong_signature));
+            intent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+
+            PendingIntent pi = PendingIntent.getActivity(getBaseContext(), PRIVATE_REQUEST_CODE_ERROR, intent, 0);
+
+            // return PendingIntent to be executed by client
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED);
+            result.putParcelable(OpenPgpConstants.RESULT_INTENT, pi);
 
-            Bundle extras = new Bundle();
-            extras.putString(RemoteServiceActivity.EXTRA_ERROR_MESSAGE,
-                    getString(R.string.api_error_wrong_signature));
-            pauseAndStartUserInteraction(RemoteServiceActivity.ACTION_ERROR_MESSAGE, null, extras);
+            return result;
         }
     }
 
@@ -161,40 +127,8 @@ public abstract class RemoteService extends Service {
     }
 
     /**
-     * Locks current thread and pauses execution of runnables and starts activity for user input
-     * 
-     * @param action
-     * @param messenger
-     * @param extras
-     */
-    protected void pauseAndStartUserInteraction(String action, BaseCallback callback, Bundle extras) {
-        synchronized (userInputLock) {
-            mThreadPool.pause();
-
-            Log.d(Constants.TAG, "starting activity...");
-            Intent intent = new Intent(getBaseContext(), RemoteServiceActivity.class);
-            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-            intent.setAction(action);
-
-            Messenger messenger = new Messenger(new Handler(getMainLooper(), callback));
-
-            extras.putParcelable(RemoteServiceActivity.EXTRA_MESSENGER, messenger);
-            intent.putExtras(extras);
-
-            startActivity(intent);
-
-            // lock current thread for user input
-            try {
-                userInputLock.wait();
-            } catch (InterruptedException e) {
-                Log.e(Constants.TAG, "CryptoService", e);
-            }
-        }
-    }
-
-    /**
      * Retrieves AppSettings from database for the application calling this remote service
-     * 
+     *
      * @return
      */
     protected AppSettings getAppSettings() {
@@ -215,66 +149,11 @@ public abstract class RemoteService extends Service {
         return null;
     }
 
-    class RegisterActivityCallback extends BaseCallback {
-        public static final String PACKAGE_NAME = "package_name";
-
-        private boolean allowed = false;
-        private String packageName;
-
-        public boolean isAllowed() {
-            return allowed;
-        }
-
-        public String getPackageName() {
-            return packageName;
-        }
-
-        @Override
-        public boolean handleMessage(Message msg) {
-            if (msg.arg1 == OKAY) {
-                allowed = true;
-                packageName = msg.getData().getString(PACKAGE_NAME);
-
-                // resume threads
-                try {
-                    if (isPackageAllowed(packageName)) {
-                        synchronized (userInputLock) {
-                            userInputLock.notifyAll();
-                        }
-                        mThreadPool.resume();
-                    } else {
-                        // Should not happen!
-                        Log.e(Constants.TAG, "Should not happen! Emergency shutdown!");
-                        mThreadPool.shutdownNow();
-                    }
-                } catch (WrongPackageSignatureException e) {
-                    Log.e(Constants.TAG, e.getMessage());
-
-                    Bundle extras = new Bundle();
-                    extras.putString(RemoteServiceActivity.EXTRA_ERROR_MESSAGE,
-                            getString(R.string.api_error_wrong_signature));
-                    pauseAndStartUserInteraction(RemoteServiceActivity.ACTION_ERROR_MESSAGE, null,
-                            extras);
-                }
-            } else {
-                allowed = false;
-
-                synchronized (userInputLock) {
-                    userInputLock.notifyAll();
-                }
-                mThreadPool.resume();
-            }
-            return true;
-        }
-
-    }
-
     /**
      * Checks if process that binds to this service (i.e. the package name corresponding to the
      * process) is in the list of allowed package names.
-     * 
-     * @param allowOnlySelf
-     *            allow only Keychain app itself
+     *
+     * @param allowOnlySelf allow only Keychain app itself
      * @return true if process is allowed to use this service
      * @throws WrongPackageSignatureException
      */
@@ -308,7 +187,7 @@ public abstract class RemoteService extends Service {
 
     /**
      * Checks if packageName is a registered app for the API. Does not return true for own package!
-     * 
+     *
      * @param packageName
      * @return
      * @throws WrongPackageSignatureException
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteServiceActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteServiceActivity.java
index 7ab39fce1..af8e3ade8 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteServiceActivity.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/RemoteServiceActivity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,8 +17,15 @@
 
 package org.sufficientlysecure.keychain.service.remote;
 
-import java.util.ArrayList;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
+import android.support.v7.app.ActionBarActivity;
+import android.view.View;
 
+import org.openintents.openpgp.util.OpenPgpConstants;
 import org.sufficientlysecure.htmltextview.HtmlTextView;
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.Id;
@@ -30,15 +37,7 @@ import org.sufficientlysecure.keychain.ui.SelectPublicKeyFragment;
 import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
 import org.sufficientlysecure.keychain.util.Log;
 
-import android.content.Intent;
-import android.os.Bundle;
-import android.os.Handler;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.RemoteException;
-import android.support.v7.app.ActionBarActivity;
-import android.view.View;
-import android.widget.Toast;
+import java.util.ArrayList;
 
 public class RemoteServiceActivity extends ActionBarActivity {
 
@@ -64,17 +63,11 @@ public class RemoteServiceActivity extends ActionBarActivity {
     // error message
     public static final String EXTRA_ERROR_MESSAGE = "error_message";
 
-    private Messenger mMessenger;
-
     // register view
     private AppSettingsFragment mSettingsFragment;
     // select pub keys view
     private SelectPublicKeyFragment mSelectFragment;
 
-    // has the user clicked one of the buttons
-    // or do we need to handle the callback in onStop()
-    private boolean finishHandled;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -82,36 +75,12 @@ public class RemoteServiceActivity extends ActionBarActivity {
         handleActions(getIntent(), savedInstanceState);
     }
 
-    @Override
-    protected void onStop() {
-        super.onStop();
-
-        if (!finishHandled) {
-            Message msg = Message.obtain();
-            msg.arg1 = RemoteService.RegisterActivityCallback.CANCEL;
-            try {
-                mMessenger.send(msg);
-            } catch (RemoteException e) {
-                Log.e(Constants.TAG, "CryptoServiceActivity", e);
-            }
-        }
-    }
-
     protected void handleActions(Intent intent, Bundle savedInstanceState) {
-        finishHandled = false;
 
         String action = intent.getAction();
-        Bundle extras = intent.getExtras();
+        final Bundle extras = intent.getExtras();
 
-        if (extras == null) {
-            extras = new Bundle();
-        }
 
-        mMessenger = extras.getParcelable(EXTRA_MESSENGER);
-
-        /**
-         * com.android.crypto actions
-         */
         if (ACTION_REGISTER.equals(action)) {
             final String packageName = extras.getString(EXTRA_PACKAGE_NAME);
             final byte[] packageSignature = extras.getByteArray(EXTRA_PACKAGE_SIGNATURE);
@@ -131,37 +100,21 @@ public class RemoteServiceActivity extends ActionBarActivity {
                                 ProviderHelper.insertApiApp(RemoteServiceActivity.this,
                                         mSettingsFragment.getAppSettings());
 
-                                Message msg = Message.obtain();
-                                msg.arg1 = RemoteService.RegisterActivityCallback.OKAY;
-                                Bundle data = new Bundle();
-                                data.putString(RemoteService.RegisterActivityCallback.PACKAGE_NAME,
-                                        packageName);
-                                msg.setData(data);
-                                try {
-                                    mMessenger.send(msg);
-                                } catch (RemoteException e) {
-                                    Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                                }
-
-                                finishHandled = true;
-                                finish();
+                                // give params through for new service call
+                                Bundle oldParams = extras.getBundle(OpenPgpConstants.PI_RESULT_PARAMS);
+
+                                Intent finishIntent = new Intent();
+                                finishIntent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, oldParams);
+                                RemoteServiceActivity.this.setResult(RESULT_OK, finishIntent);
+                                RemoteServiceActivity.this.finish();
                             }
                         }
                     }, R.string.api_register_disallow, new View.OnClickListener() {
                         @Override
                         public void onClick(View v) {
                             // Disallow
-
-                            Message msg = Message.obtain();
-                            msg.arg1 = RemoteService.RegisterActivityCallback.CANCEL;
-                            try {
-                                mMessenger.send(msg);
-                            } catch (RemoteException e) {
-                                Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                            }
-
-                            finishHandled = true;
-                            finish();
+                            RemoteServiceActivity.this.setResult(RESULT_CANCELED);
+                            RemoteServiceActivity.this.finish();
                         }
                     }
             );
@@ -175,8 +128,9 @@ public class RemoteServiceActivity extends ActionBarActivity {
             mSettingsFragment.setAppSettings(settings);
         } else if (ACTION_CACHE_PASSPHRASE.equals(action)) {
             long secretKeyId = extras.getLong(EXTRA_SECRET_KEY_ID);
+            Bundle oldParams = extras.getBundle(OpenPgpConstants.PI_RESULT_PARAMS);
 
-            showPassphraseDialog(secretKeyId);
+            showPassphraseDialog(oldParams, secretKeyId);
         } else if (ACTION_SELECT_PUB_KEYS.equals(action)) {
             long[] selectedMasterKeyIds = intent.getLongArrayExtra(EXTRA_SELECTED_MASTER_KEY_IDS);
             ArrayList<String> missingUserIds = intent
@@ -184,8 +138,8 @@ public class RemoteServiceActivity extends ActionBarActivity {
             ArrayList<String> dublicateUserIds = intent
                     .getStringArrayListExtra(EXTRA_DUBLICATE_USER_IDS);
 
-            String text = new String();
-            text += "<b>" + getString(R.string.api_select_pub_keys_text) + "</b>";
+            // TODO: do this with spannable instead of HTML to prevent parsing failures with weird user ids
+            String text = "<b>" + getString(R.string.api_select_pub_keys_text) + "</b>";
             text += "<br/><br/>";
             if (missingUserIds != null && missingUserIds.size() > 0) {
                 text += getString(R.string.api_select_pub_keys_missing_text);
@@ -212,40 +166,22 @@ public class RemoteServiceActivity extends ActionBarActivity {
                     new View.OnClickListener() {
                         @Override
                         public void onClick(View v) {
-                            // ok
-
-                            Message msg = Message.obtain();
-                            msg.arg1 = OpenPgpService.SelectPubKeysActivityCallback.OKAY;
-                            Bundle data = new Bundle();
-                            data.putLongArray(
-                                    OpenPgpService.SelectPubKeysActivityCallback.PUB_KEY_IDS,
+                            // add key ids to params Bundle for new request
+                            Bundle params = extras.getBundle(OpenPgpConstants.PI_RESULT_PARAMS);
+                            params.putLongArray(OpenPgpConstants.PARAMS_KEY_IDS,
                                     mSelectFragment.getSelectedMasterKeyIds());
-                            msg.setData(data);
-                            try {
-                                mMessenger.send(msg);
-                            } catch (RemoteException e) {
-                                Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                            }
 
-                            finishHandled = true;
-                            finish();
+                            Intent finishIntent = new Intent();
+                            finishIntent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+                            RemoteServiceActivity.this.setResult(RESULT_OK, finishIntent);
+                            RemoteServiceActivity.this.finish();
                         }
                     }, R.string.btn_do_not_save, new View.OnClickListener() {
                         @Override
                         public void onClick(View v) {
                             // cancel
-
-                            Message msg = Message.obtain();
-                            msg.arg1 = OpenPgpService.SelectPubKeysActivityCallback.CANCEL;
-                            ;
-                            try {
-                                mMessenger.send(msg);
-                            } catch (RemoteException e) {
-                                Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                            }
-
-                            finishHandled = true;
-                            finish();
+                            RemoteServiceActivity.this.setResult(RESULT_CANCELED);
+                            RemoteServiceActivity.this.finish();
                         }
                     }
             );
@@ -278,8 +214,7 @@ public class RemoteServiceActivity extends ActionBarActivity {
         } else if (ACTION_ERROR_MESSAGE.equals(action)) {
             String errorMessage = intent.getStringExtra(EXTRA_ERROR_MESSAGE);
 
-            String text = new String();
-            text += "<font color=\"red\">" + errorMessage + "</font>";
+            String text = "<font color=\"red\">" + errorMessage + "</font>";
 
             // Inflate a "Done" custom action bar view
             ActionBarHelper.setDoneView(getSupportActionBar(), R.string.btn_okay,
@@ -287,7 +222,8 @@ public class RemoteServiceActivity extends ActionBarActivity {
 
                         @Override
                         public void onClick(View v) {
-                            finish();
+                            RemoteServiceActivity.this.setResult(RESULT_OK);
+                            RemoteServiceActivity.this.finish();
                         }
                     });
 
@@ -297,7 +233,8 @@ public class RemoteServiceActivity extends ActionBarActivity {
             HtmlTextView textView = (HtmlTextView) findViewById(R.id.api_app_error_message_text);
             textView.setHtmlFromString(text);
         } else {
-            Log.e(Constants.TAG, "Wrong action!");
+            Log.e(Constants.TAG, "Action does not exist!");
+            setResult(RESULT_CANCELED);
             finish();
         }
     }
@@ -307,31 +244,21 @@ public class RemoteServiceActivity extends ActionBarActivity {
      * encryption. Based on mSecretKeyId it asks for a passphrase to open a private key or it asks
      * for a symmetric passphrase
      */
-    private void showPassphraseDialog(long secretKeyId) {
+    private void showPassphraseDialog(final Bundle params, long secretKeyId) {
         // Message is received after passphrase is cached
         Handler returnHandler = new Handler() {
             @Override
             public void handleMessage(Message message) {
                 if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
-                    Message msg = Message.obtain();
-                    msg.arg1 = OpenPgpService.PassphraseActivityCallback.OKAY;
-                    try {
-                        mMessenger.send(msg);
-                    } catch (RemoteException e) {
-                        Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                    }
+                    // return given params again, for calling the service method again
+                    Intent finishIntent = new Intent();
+                    finishIntent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+                    RemoteServiceActivity.this.setResult(RESULT_OK, finishIntent);
                 } else {
-                    Message msg = Message.obtain();
-                    msg.arg1 = OpenPgpService.PassphraseActivityCallback.CANCEL;
-                    try {
-                        mMessenger.send(msg);
-                    } catch (RemoteException e) {
-                        Log.e(Constants.TAG, "CryptoServiceActivity", e);
-                    }
+                    RemoteServiceActivity.this.setResult(RESULT_CANCELED);
                 }
 
-                finishHandled = true;
-                finish();
+                RemoteServiceActivity.this.finish();
             }
         };
 
@@ -344,9 +271,12 @@ public class RemoteServiceActivity extends ActionBarActivity {
 
             passphraseDialog.show(getSupportFragmentManager(), "passphraseDialog");
         } catch (PgpGeneralException e) {
-            Log.d(Constants.TAG, "No passphrase for this secret key, encrypt directly!");
-            // send message to handler to start encryption directly
-            returnHandler.sendEmptyMessage(PassphraseDialogFragment.MESSAGE_OKAY);
+            Log.d(Constants.TAG, "No passphrase for this secret key, do pgp operation directly!");
+            // return given params again, for calling the service method again
+            Intent finishIntent = new Intent();
+            finishIntent.putExtra(OpenPgpConstants.PI_RESULT_PARAMS, params);
+            setResult(RESULT_OK, finishIntent);
+            finish();
         }
     }
 }
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/WrongPackageSignatureException.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/WrongPackageSignatureException.java
index cef002265..cc08548e8 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/exception/WrongPackageSignatureException.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/WrongPackageSignatureException.java
@@ -1,4 +1,4 @@
-package org.sufficientlysecure.keychain.service.exception;
+package org.sufficientlysecure.keychain.service.remote;
 
 public class WrongPackageSignatureException extends Exception {
 
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptActivity.java
index 3dd077d12..b8eed83c9 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptActivity.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptActivity.java
@@ -300,7 +300,7 @@ public class DecryptActivity extends DrawerActivity {
                 String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
                 if (sharedText != null) {
                     // handle like normal text decryption, override action and extras to later
-                    // execute ACTION_DECRYPT in main actions
+                    // executeServiceMethod ACTION_DECRYPT in main actions
                     extras.putString(EXTRA_TEXT, sharedText);
                     action = ACTION_DECRYPT;
                 }
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptActivity.java
index 81446db99..85bfba224 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptActivity.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptActivity.java
@@ -173,7 +173,7 @@ public class EncryptActivity extends DrawerActivity {
                 String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
                 if (sharedText != null) {
                     // handle like normal text encryption, override action and extras to later
-                    // execute ACTION_ENCRYPT in main actions
+                    // executeServiceMethod ACTION_ENCRYPT in main actions
                     extras.putString(EXTRA_TEXT, sharedText);
                     extras.putBoolean(EXTRA_ASCII_ARMOR, true);
                     action = ACTION_ENCRYPT;
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
index e0f25b632..1864e0d9d 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ImportKeysActivity.java
@@ -57,6 +57,7 @@ public class ImportKeysActivity extends DrawerActivity implements ActionBar.OnNa
             + "IMPORT_KEY_FROM_QR_CODE";
     public static final String ACTION_IMPORT_KEY_FROM_KEYSERVER = Constants.INTENT_PREFIX
             + "IMPORT_KEY_FROM_KEYSERVER";
+    // TODO: implement:
     public static final String ACTION_IMPORT_KEY_FROM_KEYSERVER_AND_RETURN = Constants.INTENT_PREFIX
             + "IMPORT_KEY_FROM_KEY_SERVER_AND_RETURN";
 
diff --git a/OpenPGP-Keychain/src/main/res/values/strings.xml b/OpenPGP-Keychain/src/main/res/values/strings.xml
index 88ad10a0a..d34fe0105 100644
--- a/OpenPGP-Keychain/src/main/res/values/strings.xml
+++ b/OpenPGP-Keychain/src/main/res/values/strings.xml
@@ -295,7 +295,7 @@
     <string name="progress_saving">saving…</string>
     <string name="progress_importing">importing…</string>
     <string name="progress_exporting">exporting…</string>
-    <string name="progress_generating">generating key, this can take a while…</string>
+    <string name="progress_generating">generating key, this can take up to 3 minutes…</string>
     <string name="progress_building_key">building key…</string>
     <string name="progress_preparing_master_key">preparing master key…</string>
     <string name="progress_certifying_master_key">certifying master key…</string>
@@ -383,7 +383,7 @@
     <string name="api_settings_revoke">Revoke access</string>
     <string name="api_settings_package_name">Package Name</string>
     <string name="api_settings_package_signature">SHA-256 of Package Signature</string>
-    <string name="api_register_text">The following application requests access to OpenPGP Keychain.\n\nAllow permanent access?</string>
+    <string name="api_register_text">The displayed application requests access to OpenPGP Keychain.\nAllow access?\n\nWARNING: If you do not know why this screen appeared, disallow access! You can revoke access later using the \'Registered Applications\' screen.</string>
     <string name="api_register_allow">Allow access</string>
     <string name="api_register_disallow">Disallow access</string>
     <string name="api_register_error_select_key">Please select a key!</string>
diff --git a/README.md b/README.md
index a2fc5c242..01b91725d 100644
--- a/README.md
+++ b/README.md
@@ -87,8 +87,7 @@ To do automatic encryption/decryption/sign/verify use the OpenPGP Remote API.
 * NFC (``android.nfc.action.NDEF_DISCOVERED``) on mime type ``application/pgp-keys`` (as specified in http://tools.ietf.org/html/rfc3156, section 7)
 
 ### OpenPGP Remote API
-To do asyncronous fast encryption/decryption/sign/verify operations bind to the OpenPGP remote service.
-The API Demo contains all required AIDL files and a demo activity.
+To do fast encryption/decryption/sign/verify operations without user interaction bind to the OpenPGP remote service.
 
 #### Try out the API
 Keychain: https://play.google.com/store/apps/details?id=org.sufficientlysecure.keychain  
@@ -99,45 +98,25 @@ All apps wanting to use this generic API
 just need to include the AIDL files and connect to the service. Other
 OpenPGP apps can implement a service based on this AIDL definition.
 
-The API is designed to be as easy as possible to use by apps like
-K-9 Mail. The service definition defines
-sign/encrypt/signAndEncrypt/decryptAndVerify [1].
+The API is designed to be as easy as possible to use by apps like K-9 Mail.
+The service definition defines sign, encrypt, signAndEncrypt, decryptAndVerify, and getKeyIds.
 
-As can be seen the apps themselves never need handle key ids directly.
-Only user ids (emails) are used to define recipients. If more than one
-pub key exists for an email, OpenPGP Keychain will handle the problem by
-showing a selection screen.
+As can be seen in the API Demo, the apps themselves never need to handle key ids directly.
+You can use user ids (emails) to define recipients.
+If more than one public key exists for an email, OpenPGP Keychain will handle the problem by showing a selection screen. Additionally, it is also possible to use key ids.
 
-Also app devs never need to fiddle with private keys. On first
-operation, OpenPGP Keychain shows an activity to allow or disallow
-access, while also allowing to choose the private key used for this app.
-Please try the Demo app out to see how it works [4].
+Also app devs never need to fiddle with private keys.
+On first operation, OpenPGP Keychain shows an activity to allow or disallow access, while also allowing to choose the private key used for this app.
+Please try the Demo app out to see how it works.
 
 #### Integration
-The API is defined as AIDL interfaces in org.openintents.openpgp packge
-[2]. All files from [2] needs to be included in the project.
+Copy the api library from "libraries/keychain-api-library" to your project and add it as an dependency to your gradle build.
+Inspect the ode found in "OpenPGP-Keychain-API" to understand how to use the API.
 
-Using the OpenPgpServiceConnection.java [3] you can choose to which
-OpenPGP provider you want to connect (other pgp apps can implement the
-interfaces). They can be queried as shown in the demo app (see [3] how
-to query). If other OpenPGP apps implement the service, no additional
-code is required in k9mail per provider. See [3] for a complete example
-for integration.
-
-[1] https://github.com/openpgp-keychain/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/openintents/openpgp/IOpenPgpService.aidl  
-[2] https://github.com/openpgp-keychain/openpgp-keychain/tree/master/OpenPGP-Keychain-API-Demo/src/org/openintents/openpgp  
-[3] https://github.com/openpgp-keychain/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/openintents/openpgp/OpenPgpServiceConnection.java  
-[3] https://github.com/openpgp-keychain/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/sufficientlysecure/keychain/demo/OpenPgpProviderActivity.java  
-[4] https://play.google.com/store/apps/details?id=org.sufficientlysecure.keychain.demo
-
-## Extended Remote API
-
-TODO
 
 ## Libraries
 
 
-
 ### ZXing Barcode Scanner Android Integration
 
 Classes can be found under "libraries/zxing-android-integration/".
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl b/Resources/old extended service/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl
index f69f66fd7..f69f66fd7 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl
+++ b/Resources/old extended service/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl b/Resources/old extended service/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl
index 669bd31b5..669bd31b5 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl
+++ b/Resources/old extended service/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/ExtendedApiService.java b/Resources/old extended service/src/main/java/ExtendedApiService.java
index 427e6bb8f..427e6bb8f 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/remote/ExtendedApiService.java
+++ b/Resources/old extended service/src/main/java/ExtendedApiService.java
diff --git a/build.gradle b/build.gradle
index a84ab6b3c..86c40fa3a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:0.8.0'
+        classpath 'com.android.tools.build:gradle:0.8.3'
     }
 }
 
diff --git a/libraries/keychain-api-library/src/main/AndroidManifest.xml b/libraries/keychain-api-library/AndroidManifest.xml
index 32b4a82e5..768922c22 100644
--- a/libraries/keychain-api-library/src/main/AndroidManifest.xml
+++ b/libraries/keychain-api-library/AndroidManifest.xml
@@ -5,7 +5,7 @@
     android:versionName="1.0" >
 
     <uses-sdk
-        android:minSdkVersion="8"
+        android:minSdkVersion="9"
         android:targetSdkVersion="19" />
 
     <application/>
diff --git a/libraries/keychain-api-library/build.gradle b/libraries/keychain-api-library/build.gradle
index 5436ecd0a..1d5911783 100644
--- a/libraries/keychain-api-library/build.gradle
+++ b/libraries/keychain-api-library/build.gradle
@@ -1,10 +1,33 @@
-apply plugin: 'android-library'
+// please leave this here, so this library builds on its own
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:0.8.3'
+    }
+}
 
+apply plugin: 'android-library'
 
 android {
     compileSdkVersion 19
     buildToolsVersion '19.0.1'
     
+    // NOTE: We are using the old folder structure to also support Eclipse
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java.srcDirs = ['src']
+            resources.srcDirs = ['src']
+            aidl.srcDirs = ['src']
+            renderscript.srcDirs = ['src']
+            res.srcDirs = ['res']
+            assets.srcDirs = ['assets']
+        }
+    }
+    
     // Do not abort build if lint finds errors
     lintOptions {
         abortOnError false
diff --git a/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png b/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..71b9118dc
--- /dev/null
+++ b/libraries/keychain-api-library/res/drawable-hdpi/ic_action_cancel_launchersize.png
diff --git a/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png b/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..270abf45f
--- /dev/null
+++ b/libraries/keychain-api-library/res/drawable-mdpi/ic_action_cancel_launchersize.png
diff --git a/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png b/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..1e3571fa5
--- /dev/null
+++ b/libraries/keychain-api-library/res/drawable-xhdpi/ic_action_cancel_launchersize.png
diff --git a/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png b/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 000000000..52044601e
--- /dev/null
+++ b/libraries/keychain-api-library/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
diff --git a/libraries/keychain-api-library/res/values/strings.xml b/libraries/keychain-api-library/res/values/strings.xml
new file mode 100644
index 000000000..a198d0b5e
--- /dev/null
+++ b/libraries/keychain-api-library/res/values/strings.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="openpgp_list_preference_none">None</string>
+
+</resources>
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl
deleted file mode 100644
index ba41de1ba..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpCallback.aidl
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpData;
-import org.openintents.openpgp.OpenPgpSignatureResult;
-import org.openintents.openpgp.OpenPgpError;
-
-interface IOpenPgpCallback {
-    
-    /**
-     * onSuccess returns on successful OpenPGP operations.
-     * 
-     * @param output
-     *            contains resulting output (decrypted content (when input was encrypted)
-     *            or content without signature (when input was signed-only))
-     * @param signatureResult
-     *            signatureResult is only non-null if decryptAndVerify() was called and the content
-     *            was encrypted or signed-and-encrypted.
-     */
-    oneway void onSuccess(in OpenPgpData output, in OpenPgpSignatureResult signatureResult);
-
-    /**
-     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
-     * was required execute an OpenPGP operation.
-     * 
-     * @param error
-     *            See OpenPgpError class for more information.
-     */
-    oneway void onError(in OpenPgpError error);
-}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
deleted file mode 100644
index 4ca356fad..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpKeyIdsCallback.aidl
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpError;
-
-interface IOpenPgpKeyIdsCallback {
-    
-    /**
-     * onSuccess returns on successful getKeyIds operations.
-     * 
-     * @param keyIds
-     *            returned key ids
-     */
-    oneway void onSuccess(in long[] keyIds);
-
-    /**
-     * onError returns on errors or when allowUserInteraction was set to false, but user interaction
-     * was required execute an OpenPGP operation.
-     * 
-     * @param error
-     *            See OpenPgpError class for more information.
-     */
-    oneway void onError(in OpenPgpError error);
-}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
deleted file mode 100644
index 8f9e8a0fd..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-import org.openintents.openpgp.OpenPgpData;
-import org.openintents.openpgp.IOpenPgpCallback;
-import org.openintents.openpgp.IOpenPgpKeyIdsCallback;
-
-/**
- * All methods are oneway, which means they are asynchronous and non-blocking.
- * Results are returned to the callback, which has to be implemented on client side.
- */
-interface IOpenPgpService {
-
-    /**
-     * Sign
-     * 
-     * After successful signing, callback's onSuccess will contain the resulting output.
-     *
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void sign(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
-    
-    /**
-     * Encrypt
-     * 
-     * After successful encryption, callback's onSuccess will contain the resulting output.
-     * 
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param keyIds
-     *            Key Ids of recipients. Can be retrieved with getKeyIds()
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void encrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
-    
-    /**
-     * Sign then encrypt
-     * 
-     * After successful signing and encryption, callback's onSuccess will contain the resulting output.
-     *
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param keyIds
-     *            Key Ids of recipients. Can be retrieved with getKeyIds()
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void signAndEncrypt(in OpenPgpData input, in OpenPgpData output, in long[] keyIds, in IOpenPgpCallback callback);
-    
-    /**
-     * Decrypts and verifies given input bytes. This methods handles encrypted-only, signed-and-encrypted,
-     * and also signed-only input.
-     * 
-     * After successful decryption/verification, callback's onSuccess will contain the resulting output.
-     * The signatureResult in onSuccess is only non-null if signed-and-encrypted or signed-only inputBytes were given.
-     * 
-     * @param input
-     *            OpenPgpData object containing String, byte[], ParcelFileDescriptor, or Uri
-     * @param output
-     *            Request output format by defining OpenPgpData object
-     *            
-     *            new OpenPgpData(OpenPgpData.TYPE_STRING)
-     *                Returns as String
-     *                (OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
-     *            new OpenPgpData(OpenPgpData.TYPE_BYTE_ARRAY)
-     *                Returns as byte[]
-     *            new OpenPgpData(uri)
-     *                Writes output to given Uri
-     *            new OpenPgpData(fileDescriptor)
-     *                Writes output to given ParcelFileDescriptor
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void decryptAndVerify(in OpenPgpData input, in OpenPgpData output, in IOpenPgpCallback callback);
-    
-    /**
-     * Get available key ids based on given user ids
-     *
-     * @param ids
-     *            User Ids (emails) of recipients OR key ids
-     * @param allowUserInteraction
-     *            Enable user interaction to lookup and import unknown keys
-     * @param callback
-     *            Callback where to return results (different type than callback in other functions!)
-     */
-    oneway void getKeyIds(in String[] ids, in boolean allowUserInteraction, in IOpenPgpKeyIdsCallback callback);
-    
-}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl
deleted file mode 100644
index 3711e4fb4..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpData.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpData so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpData;
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl
deleted file mode 100644
index 7a6bed1e6..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpError.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpError so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpError;
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl b/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl
deleted file mode 100644
index e246792d0..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/openintents/openpgp/OpenPgpSignatureResult.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.openintents.openpgp;
-
-// Declare OpenPgpSignatureResult so AIDL can find it and knows that it implements the parcelable protocol.
-parcelable OpenPgpSignatureResult;
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl b/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl
deleted file mode 100644
index f69f66fd7..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiCallback.aidl
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.sufficientlysecure.keychain.service.remote;
-
-interface IExtendedApiCallback {
-    
-    oneway void onSuccess(in byte[] outputBytes);
-
-    oneway void onError(in String error);
-}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl b/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl
deleted file mode 100644
index 669bd31b5..000000000
--- a/libraries/keychain-api-library/src/main/aidl/org/sufficientlysecure/keychain/service/remote/IExtendedApiService.aidl
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- 
-package org.sufficientlysecure.keychain.service.remote;
-
-import org.sufficientlysecure.keychain.service.remote.IExtendedApiCallback;
-
-/**
- * All methods are oneway, which means they are asynchronous and non-blocking.
- * Results are returned to the callback, which has to be implemented on client side.
- */
-interface IExtendedApiService {
-       
-    /**
-     * Symmetric Encrypt
-     * 
-     * @param inputBytes
-     *            Byte array you want to encrypt
-     * @param passphrase
-     *            symmetric passhprase
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void encrypt(in byte[] inputBytes, in String passphrase, in IExtendedApiCallback callback);
-    
-    /**
-     * Generates self signed X509 certificate signed by OpenPGP private key (from app settings)
-     *
-     * @param subjAltNameURI
-     * @param callback
-     *            Callback where to return results
-     */
-    oneway void selfSignedX509Cert(in String subjAltNameURI, in IExtendedApiCallback callback);
-    
-}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java b/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
deleted file mode 100644
index b1ca1bfe6..000000000
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpConstants.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.openintents.openpgp;
-
-public class OpenPgpConstants {
-
-    public static final String TAG = "OpenPgp API";
-
-    public static final int REQUIRED_API_VERSION = 1;
-    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
-
-}
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java b/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java
deleted file mode 100644
index 6615c2146..000000000
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpData.java
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import android.net.Uri;
-import android.os.Parcel;
-import android.os.ParcelFileDescriptor;
-import android.os.Parcelable;
-
-public class OpenPgpData implements Parcelable {
-    public static final int TYPE_STRING = 0;
-    public static final int TYPE_BYTE_ARRAY = 1;
-    public static final int TYPE_FILE_DESCRIPTOR = 2;
-    public static final int TYPE_URI = 3;
-
-    int type;
-
-    String string;
-    byte[] bytes = new byte[0];
-    ParcelFileDescriptor fileDescriptor;
-    Uri uri;
-
-    public int getType() {
-        return type;
-    }
-
-    public String getString() {
-        return string;
-    }
-
-    public byte[] getBytes() {
-        return bytes;
-    }
-
-    public ParcelFileDescriptor getFileDescriptor() {
-        return fileDescriptor;
-    }
-
-    public Uri getUri() {
-        return uri;
-    }
-
-    public OpenPgpData() {
-
-    }
-
-    /**
-     * Not a real constructor. This can be used to define requested output type.
-     * 
-     * @param type
-     */
-    public OpenPgpData(int type) {
-        this.type = type;
-    }
-
-    public OpenPgpData(String string) {
-        this.string = string;
-        this.type = TYPE_STRING;
-    }
-
-    public OpenPgpData(byte[] bytes) {
-        this.bytes = bytes;
-        this.type = TYPE_BYTE_ARRAY;
-    }
-
-    public OpenPgpData(ParcelFileDescriptor fileDescriptor) {
-        this.fileDescriptor = fileDescriptor;
-        this.type = TYPE_FILE_DESCRIPTOR;
-    }
-
-    public OpenPgpData(Uri uri) {
-        this.uri = uri;
-        this.type = TYPE_URI;
-    }
-
-    public OpenPgpData(OpenPgpData b) {
-        this.string = b.string;
-        this.bytes = b.bytes;
-        this.fileDescriptor = b.fileDescriptor;
-        this.uri = b.uri;
-    }
-
-    public int describeContents() {
-        return 0;
-    }
-
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(type);
-        dest.writeString(string);
-        dest.writeInt(bytes.length);
-        dest.writeByteArray(bytes);
-        dest.writeParcelable(fileDescriptor, 0);
-        dest.writeParcelable(uri, 0);
-    }
-
-    public static final Creator<OpenPgpData> CREATOR = new Creator<OpenPgpData>() {
-        public OpenPgpData createFromParcel(final Parcel source) {
-            OpenPgpData vr = new OpenPgpData();
-            vr.type = source.readInt();
-            vr.string = source.readString();
-            vr.bytes = new byte[source.readInt()];
-            source.readByteArray(vr.bytes);
-            vr.fileDescriptor = source.readParcelable(ParcelFileDescriptor.class.getClassLoader());
-            vr.fileDescriptor = source.readParcelable(Uri.class.getClassLoader());
-            return vr;
-        }
-
-        public OpenPgpData[] newArray(final int size) {
-            return new OpenPgpData[size];
-        }
-    };
-
-}
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java b/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
deleted file mode 100644
index 7305c47ce..000000000
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpHelper.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.openintents.openpgp;
-
-import java.util.List;
-import java.util.regex.Pattern;
-
-import android.content.Context;
-import android.content.Intent;
-import android.content.pm.ResolveInfo;
-
-public class OpenPgpHelper {
-    private Context context;
-
-    public static Pattern PGP_MESSAGE = Pattern.compile(
-            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*", Pattern.DOTALL);
-
-    public static Pattern PGP_SIGNED_MESSAGE = Pattern
-            .compile(
-                    ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
-                    Pattern.DOTALL);
-
-    public OpenPgpHelper(Context context) {
-        super();
-        this.context = context;
-    }
-
-    public boolean isAvailable() {
-        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
-        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
-        if (!resInfo.isEmpty()) {
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-}
diff --git a/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl b/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl
new file mode 100644
index 000000000..578a7d4b5
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/IOpenPgpService.aidl
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+package org.openintents.openpgp;
+
+interface IOpenPgpService {
+
+    /**
+     * General extras
+     * --------------
+     * 
+     * Bundle params:
+     * int          api_version (required)
+     * boolean      ascii_armor (request ascii armor for ouput)
+     *
+     * returned Bundle:
+     * int          result_code (0, 1, or 2 (see OpenPgpConstants))
+     * OpenPgpError error       (if result_code == 0)
+     * Intent       intent      (if result_code == 2)
+     *
+     */
+
+    /**
+     * Sign only
+     *
+     * optional params:
+     * String       passphrase  (for key passphrase)
+     */
+    Bundle sign(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Encrypt
+     *
+     * Bundle params:
+     * long[]       key_ids
+     * or
+     * String[]     user_ids    (= emails of recipients) (if more than one key has this user_id, a PendingIntent is returned)
+     *
+     * optional params:
+     * String       passphrase  (for key passphrase)
+     */
+    Bundle encrypt(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Sign and encrypt
+     *
+     * Bundle params:
+     * same as in encrypt()
+     */
+    Bundle signAndEncrypt(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Decrypts and verifies given input bytes. This methods handles encrypted-only, signed-and-encrypted,
+     * and also signed-only input.
+     *
+     * returned Bundle:
+     * OpenPgpSignatureResult   signature_result
+     */
+    Bundle decryptAndVerify(in Bundle params, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+    /**
+     * Retrieves key ids based on given user ids (=emails)
+     *
+     * Bundle params:
+     * String[]     user_ids
+     *
+     * returned Bundle:
+     * long[]       key_ids
+     */
+    Bundle getKeyIds(in Bundle params);
+
+}
\ No newline at end of file
diff --git a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpError.java b/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpError.java
index f108d3169..4dd2cc641 100644
--- a/OpenPGP-Keychain-API/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpError.java
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpError.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,10 +20,13 @@ import android.os.Parcel;
 import android.os.Parcelable;
 
 public class OpenPgpError implements Parcelable {
+    public static final int CLIENT_SIDE_ERROR = -1;
+
     public static final int GENERIC_ERROR = 0;
-    public static final int NO_OR_WRONG_PASSPHRASE = 1;
-    public static final int NO_USER_IDS = 2;
-    public static final int USER_INTERACTION_REQUIRED = 3;
+    public static final int INCOMPATIBLE_API_VERSIONS = 1;
+
+    public static final int NO_OR_WRONG_PASSPHRASE = 2;
+    public static final int NO_USER_IDS = 3;
 
     int errorId;
     String message;
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java b/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpSignatureResult.java
index 829f8f8cf..16c79ca27 100644
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/OpenPgpSignatureResult.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,14 +22,14 @@ import android.os.Parcelable;
 public class OpenPgpSignatureResult implements Parcelable {
     // generic error on signature verification
     public static final int SIGNATURE_ERROR = 0;
-    // successfully verified signature, with trusted public key
-    public static final int SIGNATURE_SUCCESS_TRUSTED = 1;
+    // successfully verified signature, with certified public key
+    public static final int SIGNATURE_SUCCESS_CERTIFIED = 1;
     // no public key was found for this signature verification
     // you can retrieve the key with
     // getKeys(new String[] {String.valueOf(signatureResult.getKeyId)}, true, callback)
     public static final int SIGNATURE_UNKNOWN_PUB_KEY = 2;
-    // successfully verified signature, but with untrusted public key
-    public static final int SIGNATURE_SUCCESS_UNTRUSTED = 3;
+    // successfully verified signature, but with certified public key
+    public static final int SIGNATURE_SUCCESS_UNCERTIFIED = 3;
 
     int status;
     boolean signatureOnly;
diff --git a/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java
new file mode 100644
index 000000000..f121c345d
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpApi.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.content.Context;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import org.openintents.openpgp.IOpenPgpService;
+import org.openintents.openpgp.OpenPgpError;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class OpenPgpApi {
+
+    IOpenPgpService mService;
+    Context mContext;
+
+    private static final int OPERATION_SIGN = 0;
+    private static final int OPERATION_ENCRYPT = 1;
+    private static final int OPERATION_SIGN_ENCRYPT = 2;
+    private static final int OPERATION_DECRYPT_VERIFY = 3;
+    private static final int OPERATION_GET_KEY_IDS = 4;
+
+    public OpenPgpApi(Context context, IOpenPgpService service) {
+        this.mContext = context;
+        this.mService = service;
+    }
+
+    public Bundle sign(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN, new Bundle(), is, os);
+    }
+
+    public Bundle sign(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN, params, is, os);
+    }
+
+    public void sign(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_SIGN, params, is, os, callback);
+    }
+
+    public Bundle encrypt(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_ENCRYPT, new Bundle(), is, os);
+    }
+
+    public Bundle encrypt(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_ENCRYPT, params, is, os);
+    }
+
+    public void encrypt(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_ENCRYPT, params, is, os, callback);
+    }
+
+    public Bundle signAndEncrypt(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN_ENCRYPT, new Bundle(), is, os);
+    }
+
+    public Bundle signAndEncrypt(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_SIGN_ENCRYPT, params, is, os);
+    }
+
+    public void signAndEncrypt(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_SIGN_ENCRYPT, params, is, os, callback);
+    }
+
+    public Bundle decryptAndVerify(InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_DECRYPT_VERIFY, new Bundle(), is, os);
+    }
+
+    public Bundle decryptAndVerify(Bundle params, InputStream is, final OutputStream os) {
+        return executeApi(OPERATION_DECRYPT_VERIFY, params, is, os);
+    }
+
+    public void decryptAndVerify(Bundle params, InputStream is, final OutputStream os, IOpenPgpCallback callback) {
+        executeApiAsync(OPERATION_DECRYPT_VERIFY, params, is, os, callback);
+    }
+
+    public Bundle getKeyIds(Bundle params) {
+        return executeApi(OPERATION_GET_KEY_IDS, params, null, null);
+    }
+
+    public interface IOpenPgpCallback {
+        void onReturn(final Bundle result);
+    }
+
+    private class OpenPgpAsyncTask extends AsyncTask<Void, Integer, Bundle> {
+        int operationId;
+        Bundle params;
+        InputStream is;
+        OutputStream os;
+        IOpenPgpCallback callback;
+
+        private OpenPgpAsyncTask(int operationId, Bundle params, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+            this.operationId = operationId;
+            this.params = params;
+            this.is = is;
+            this.os = os;
+            this.callback = callback;
+        }
+
+        @Override
+        protected Bundle doInBackground(Void... unused) {
+            return executeApi(operationId, params, is, os);
+        }
+
+        protected void onPostExecute(Bundle result) {
+            callback.onReturn(result);
+        }
+
+    }
+
+    private void executeApiAsync(int operationId, Bundle params, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+        new OpenPgpAsyncTask(operationId, params, is, os, callback).execute((Void[]) null);
+    }
+
+    private Bundle executeApi(int operationId, Bundle params, InputStream is, OutputStream os) {
+        try {
+            params.putInt(OpenPgpConstants.PARAMS_API_VERSION, OpenPgpConstants.API_VERSION);
+
+            Bundle result = null;
+
+            if (operationId == OPERATION_GET_KEY_IDS) {
+                result = mService.getKeyIds(params);
+                return result;
+            } else {
+                // send the input and output pfds
+                ParcelFileDescriptor input = ParcelFileDescriptorUtil.pipeFrom(is,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                Log.d(OpenPgpConstants.TAG, "Copy to service finished");
+                            }
+                        });
+                ParcelFileDescriptor output = ParcelFileDescriptorUtil.pipeTo(os,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                Log.d(OpenPgpConstants.TAG, "Service finished writing!");
+                            }
+                        });
+
+
+                // blocks until result is ready
+                switch (operationId) {
+                    case OPERATION_SIGN:
+                        result = mService.sign(params, input, output);
+                        break;
+                    case OPERATION_ENCRYPT:
+                        result = mService.encrypt(params, input, output);
+                        break;
+                    case OPERATION_SIGN_ENCRYPT:
+                        result = mService.signAndEncrypt(params, input, output);
+                        break;
+                    case OPERATION_DECRYPT_VERIFY:
+                        result = mService.decryptAndVerify(params, input, output);
+                        break;
+                }
+                // close() is required to halt the TransferThread
+                output.close();
+
+                // set class loader to current context to allow unparcelling
+                // of OpenPgpError and OpenPgpSignatureResult
+                // http://stackoverflow.com/a/3806769
+                result.setClassLoader(mContext.getClassLoader());
+
+                return result;
+            }
+        } catch (Exception e) {
+            Log.e(OpenPgpConstants.TAG, "Exception", e);
+            Bundle result = new Bundle();
+            result.putInt(OpenPgpConstants.RESULT_CODE, OpenPgpConstants.RESULT_CODE_ERROR);
+            result.putParcelable(OpenPgpConstants.RESULT_ERRORS,
+                    new OpenPgpError(OpenPgpError.CLIENT_SIDE_ERROR, e.getMessage()));
+            return result;
+        }
+    }
+
+
+}
diff --git a/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java
new file mode 100644
index 000000000..263b42aaa
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpConstants.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+public class OpenPgpConstants {
+
+    public static final String TAG = "OpenPgp API";
+
+    public static final int API_VERSION = 1;
+    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
+
+
+    /* Bundle params */
+    public static final String PARAMS_API_VERSION = "api_version";
+    // request ASCII Armor for output
+    // OpenPGP Radix-64, 33 percent overhead compared to binary, see http://tools.ietf.org/html/rfc4880#page-53)
+    public static final String PARAMS_REQUEST_ASCII_ARMOR = "ascii_armor";
+    // (for encrypt method)
+    public static final String PARAMS_USER_IDS = "user_ids";
+    public static final String PARAMS_KEY_IDS = "key_ids";
+    // optional parameter:
+    public static final String PARAMS_PASSPHRASE = "passphrase";
+
+    /* Service Bundle returns */
+    public static final String RESULT_CODE = "result_code";
+    public static final String RESULT_SIGNATURE = "signature";
+    public static final String RESULT_ERRORS = "error";
+    public static final String RESULT_INTENT = "intent";
+
+    // get actual error object from RESULT_ERRORS
+    public static final int RESULT_CODE_ERROR = 0;
+    // success!
+    public static final int RESULT_CODE_SUCCESS = 1;
+    // executeServiceMethod intent and do it again with params from intent
+    public static final int RESULT_CODE_USER_INTERACTION_REQUIRED = 2;
+
+    /* PendingIntent returns */
+    public static final String PI_RESULT_PARAMS = "params";
+
+}
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpListPreference.java
index 4ddd97485..034186a3a 100644
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpListPreference.java
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpListPreference.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,18 +14,14 @@
  * limitations under the License.
  */
 
-package org.openintents.openpgp;
-
-import java.util.ArrayList;
-import java.util.List;
+package org.openintents.openpgp.util;
 
 import android.app.AlertDialog.Builder;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
-import android.content.pm.ServiceInfo;
+import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
 import android.preference.DialogPreference;
 import android.util.AttributeSet;
@@ -35,33 +31,21 @@ import android.widget.ArrayAdapter;
 import android.widget.ListAdapter;
 import android.widget.TextView;
 
+import java.util.ArrayList;
+import java.util.List;
+
+import org.sufficientlysecure.keychain.api.R;
+
+/**
+ * Does not extend ListPreference, but is very similar to it!
+ * http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android/4.4_r1/android/preference/ListPreference.java/?v=source
+ */
 public class OpenPgpListPreference extends DialogPreference {
-    ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
+    private ArrayList<OpenPgpProviderEntry> mProviderList = new ArrayList<OpenPgpProviderEntry>();
     private String mSelectedPackage;
 
     public OpenPgpListPreference(Context context, AttributeSet attrs) {
         super(context, attrs);
-
-        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(
-                new Intent(OpenPgpConstants.SERVICE_INTENT), PackageManager.GET_META_DATA);
-        if (!resInfo.isEmpty()) {
-            for (ResolveInfo resolveInfo : resInfo) {
-                if (resolveInfo.serviceInfo == null)
-                    continue;
-
-                String packageName = resolveInfo.serviceInfo.packageName;
-                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(context
-                        .getPackageManager()));
-                Drawable icon = resolveInfo.serviceInfo.loadIcon(context.getPackageManager());
-
-                // get api version
-                ServiceInfo si = resolveInfo.serviceInfo;
-                int apiVersion = si.metaData.getInt("api_version");
-
-                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon,
-                        apiVersion));
-            }
-        }
     }
 
     public OpenPgpListPreference(Context context) {
@@ -69,20 +53,42 @@ public class OpenPgpListPreference extends DialogPreference {
     }
 
     /**
-     * Can be used to add "no selection"
-     * 
+     * Public method to add new entries for legacy applications
+     *
      * @param packageName
      * @param simpleName
      * @param icon
      */
-    public void addProvider(int position, String packageName, String simpleName, Drawable icon,
-            int apiVersion) {
-        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon,
-                apiVersion));
+    public void addProvider(int position, String packageName, String simpleName, Drawable icon) {
+        mProviderList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon));
     }
 
     @Override
     protected void onPrepareDialogBuilder(Builder builder) {
+
+        // get providers
+        mProviderList.clear();
+        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = getContext().getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            for (ResolveInfo resolveInfo : resInfo) {
+                if (resolveInfo.serviceInfo == null)
+                    continue;
+
+                String packageName = resolveInfo.serviceInfo.packageName;
+                String simpleName = String.valueOf(resolveInfo.serviceInfo.loadLabel(getContext()
+                        .getPackageManager()));
+                Drawable icon = resolveInfo.serviceInfo.loadIcon(getContext().getPackageManager());
+
+                mProviderList.add(new OpenPgpProviderEntry(packageName, simpleName, icon));
+            }
+        }
+
+        // add "none"-entry
+        mProviderList.add(0, new OpenPgpProviderEntry("",
+                getContext().getString(R.string.openpgp_list_preference_none),
+                getContext().getResources().getDrawable(R.drawable.ic_action_cancel_launchersize)));
+
         // Init ArrayAdapter with OpenPGP Providers
         ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
                 android.R.layout.select_dialog_singlechoice, android.R.id.text1, mProviderList) {
@@ -99,15 +105,6 @@ public class OpenPgpListPreference extends DialogPreference {
                 int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
                 tv.setCompoundDrawablePadding(dp10);
 
-                // disable if it has the wrong api_version
-                if (mProviderList.get(position).apiVersion == OpenPgpConstants.REQUIRED_API_VERSION) {
-                    tv.setEnabled(true);
-                } else {
-                    tv.setEnabled(false);
-                    tv.setText(tv.getText() + " (API v" + mProviderList.get(position).apiVersion
-                            + ", needs v" + OpenPgpConstants.REQUIRED_API_VERSION + ")");
-                }
-
                 return v;
             }
         };
@@ -169,6 +166,16 @@ public class OpenPgpListPreference extends DialogPreference {
         return getEntryByValue(mSelectedPackage);
     }
 
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        return a.getString(index);
+    }
+
+    @Override
+    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
+        setValue(restoreValue ? getPersistedString(mSelectedPackage) : (String) defaultValue);
+    }
+
     public String getEntryByValue(String packageName) {
         for (OpenPgpProviderEntry app : mProviderList) {
             if (app.packageName.equals(packageName)) {
@@ -183,14 +190,11 @@ public class OpenPgpListPreference extends DialogPreference {
         private String packageName;
         private String simpleName;
         private Drawable icon;
-        private int apiVersion;
 
-        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon,
-                int apiVersion) {
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon) {
             this.packageName = packageName;
             this.simpleName = simpleName;
             this.icon = icon;
-            this.apiVersion = apiVersion;
         }
 
         @Override
diff --git a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
index f7ba06aaf..8e8812faa 100644
--- a/libraries/keychain-api-library/src/main/java/org/openintents/openpgp/OpenPgpServiceConnection.java
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpServiceConnection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.openintents.openpgp;
+package org.openintents.openpgp.util;
 
 import org.openintents.openpgp.IOpenPgpService;
 
@@ -61,11 +61,12 @@ public class OpenPgpServiceConnection {
 
     /**
      * If not already bound, bind!
-     * 
+     *
      * @return
      */
     public boolean bindToService() {
-        if (mService == null && !mBound) { // if not already connected
+        // if not already connected
+        if (mService == null && !mBound) {
             try {
                 Log.d(OpenPgpConstants.TAG, "not bound yet");
 
diff --git a/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java
new file mode 100644
index 000000000..ffecaceba
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/OpenPgpUtils.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+
+public class OpenPgpUtils {
+
+    public static final Pattern PGP_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*",
+            Pattern.DOTALL);
+
+    public static final Pattern PGP_SIGNED_MESSAGE = Pattern.compile(
+            ".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
+            Pattern.DOTALL);
+
+    public static final int PARSE_RESULT_NO_PGP = -1;
+    public static final int PARSE_RESULT_MESSAGE = 0;
+    public static final int PARSE_RESULT_SIGNED_MESSAGE = 1;
+
+    public static int parseMessage(String message) {
+        Matcher matcherSigned = PGP_SIGNED_MESSAGE.matcher(message);
+        Matcher matcherMessage = PGP_MESSAGE.matcher(message);
+
+        if (matcherMessage.matches()) {
+            return PARSE_RESULT_MESSAGE;
+        } else if (matcherSigned.matches()) {
+            return PARSE_RESULT_SIGNED_MESSAGE;
+        } else {
+            return PARSE_RESULT_NO_PGP;
+        }
+    }
+
+    public static boolean isAvailable(Context context) {
+        Intent intent = new Intent(OpenPgpConstants.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
+        if (!resInfo.isEmpty()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+}
diff --git a/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java b/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
new file mode 100644
index 000000000..75d4b8c18
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *               2013 Flow (http://stackoverflow.com/questions/18212152/transfer-inputstream-to-another-service-across-process-boundaries-with-parcelf)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.openintents.openpgp.util;
+
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class ParcelFileDescriptorUtil {
+
+    public interface IThreadListener {
+        void onThreadFinished(final Thread thread);
+    }
+
+    public static ParcelFileDescriptor pipeFrom(InputStream inputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(inputStream, new ParcelFileDescriptor.AutoCloseOutputStream(writeSide),
+                listener)
+                .start();
+
+        return readSide;
+    }
+
+    public static ParcelFileDescriptor pipeTo(OutputStream outputStream, IThreadListener listener)
+            throws IOException {
+        ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
+        ParcelFileDescriptor readSide = pipe[0];
+        ParcelFileDescriptor writeSide = pipe[1];
+
+        // start the transfer thread
+        new TransferThread(new ParcelFileDescriptor.AutoCloseInputStream(readSide), outputStream,
+                listener)
+                .start();
+
+        return writeSide;
+    }
+
+    static class TransferThread extends Thread {
+        final InputStream mIn;
+        final OutputStream mOut;
+        final IThreadListener mListener;
+
+        TransferThread(InputStream in, OutputStream out, IThreadListener listener) {
+            super("ParcelFileDescriptor Transfer Thread");
+            mIn = in;
+            mOut = out;
+            mListener = listener;
+            setDaemon(true);
+        }
+
+        @Override
+        public void run() {
+            byte[] buf = new byte[1024];
+            int len;
+
+            try {
+                while ((len = mIn.read(buf)) > 0) {
+                    mOut.write(buf, 0, len);
+                }
+                mOut.flush(); // just to be safe
+            } catch (IOException e) {
+                Log.e(OpenPgpConstants.TAG, "TransferThread" + getId() + ": writing failed", e);
+            } finally {
+                try {
+                    mIn.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpConstants.TAG, "TransferThread" + getId(), e);
+                }
+                try {
+                    mOut.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpConstants.TAG, "TransferThread" + getId(), e);
+                }
+            }
+            if (mListener != null) {
+                Log.d(OpenPgpConstants.TAG, "TransferThread " + getId() + " finished!");
+                mListener.onThreadFinished(this);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java b/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java
new file mode 100644
index 000000000..15aceb534
--- /dev/null
+++ b/libraries/keychain-api-library/src/org/sufficientlysecure/keychain/api/OpenKeychainIntents.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.api;
+
+public class OpenKeychainIntents {
+
+    public static final String ENCRYPT = "org.sufficientlysecure.keychain.action.ENCRYPT";
+    public static final String ENCRYPT_EXTRA_TEXT = "text"; // String
+    public static final String ENCRYPT_ASCII_ARMOR = "ascii_armor"; // boolean
+
+    public static final String DECRYPT = "org.sufficientlysecure.keychain.action.DECRYPT";
+    public static final String DECRYPT_EXTRA_TEXT = "text"; // String
+
+    public static final String IMPORT_KEY = "org.sufficientlysecure.keychain.action.IMPORT_KEY";
+    public static final String IMPORT_KEY_EXTRA_KEY_BYTES = "key_bytes"; // byte[]
+
+    public static final String IMPORT_KEY_FROM_KEYSERVER = "org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_KEYSERVER";
+    public static final String IMPORT_KEY_FROM_KEYSERVER_QUERY = "query"; // String
+    public static final String IMPORT_KEY_FROM_KEYSERVER_FINGERPRINT = "fingerprint"; // String
+
+    public static final String IMPORT_KEY_FROM_QR_CODE = "org.sufficientlysecure.keychain.action.IMPORT_KEY_FROM_QR_CODE";
+
+}