Restructure for jcenter publish

39 files changed, 1974 insertions, 0 deletions

diff --git a/openpgp-api/.gitignore b/openpgp-api/.gitignore
new file mode 100644
index 0000000..a44cc0f
--- /dev/null
+++ b/openpgp-api/.gitignore
@@ -0,0 +1,33 @@
+#Android specific
+bin
+gen
+obj
+lint.xml
+local.properties
+release.properties
+ant.properties
+*.class
+*.apk
+
+#Gradle
+.gradle
+build
+gradle.properties
+
+#Maven
+target
+pom.xml.*
+
+#Eclipse
+.project
+.classpath
+.settings
+.metadata
+
+#IntelliJ IDEA
+.idea
+*.iml
+
+#Lint output
+lint-report.html
+lint-report_files/*
\ No newline at end of file
diff --git a/openpgp-api/build.gradle b/openpgp-api/build.gradle
new file mode 100644
index 0000000..f2885b9
--- /dev/null
+++ b/openpgp-api/build.gradle
@@ -0,0 +1,28 @@
+apply plugin: 'com.android.library'
+apply plugin: 'bintray-release' // must be applied after your artifact generating plugin (eg. java / com.android.library)
+
+android {
+    compileSdkVersion 22
+    buildToolsVersion '21.1.2'
+
+    defaultConfig {
+        versionCode 6
+        versionName '7.0' // API-Version . minor
+        minSdkVersion 9
+        targetSdkVersion 22
+    }
+    
+    // Do not abort build if lint finds errors
+    lintOptions {
+        abortOnError false
+    }
+}
+
+publish {
+    userOrg = 'sufficientlysecure'
+    groupId = 'org.sufficientlysecure'
+    artifactId = 'openpgp-api'
+    version = '7.0'
+    description = 'The OpenPGP API provides methods to execute OpenPGP operations, such as sign, encrypt, decrypt, verify, and more without user interaction from background threads'
+    website = 'https://github.com/sufficientlysecure/openpgp-api'
+}
\ No newline at end of file
diff --git a/openpgp-api/src/main/AndroidManifest.xml b/openpgp-api/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..f1f29cf
--- /dev/null
+++ b/openpgp-api/src/main/AndroidManifest.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.openintents.openpgp">
+
+    <application/>
+
+</manifest>
\ No newline at end of file
diff --git a/openpgp-api/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl b/openpgp-api/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
new file mode 100644
index 0000000..2451207
--- /dev/null
+++ b/openpgp-api/src/main/aidl/org/openintents/openpgp/IOpenPgpService.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2014-2015 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 {
+
+    // see OpenPgpApi for documentation
+    Intent execute(in Intent data, in ParcelFileDescriptor input, in ParcelFileDescriptor output);
+
+}
\ No newline at end of file
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpError.java b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpError.java
new file mode 100644
index 0000000..ce8f21f
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpError.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2014-2015 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.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpError implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 1;
+
+    // possible values for errorId
+    public static final int CLIENT_SIDE_ERROR = -1;
+    public static final int GENERIC_ERROR = 0;
+    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;
+
+    public OpenPgpError() {
+    }
+
+    public OpenPgpError(int errorId, String message) {
+        this.errorId = errorId;
+        this.message = message;
+    }
+
+    public OpenPgpError(OpenPgpError b) {
+        this.errorId = b.errorId;
+        this.message = b.message;
+    }
+
+    public int getErrorId() {
+        return errorId;
+    }
+
+    public void setErrorId(int errorId) {
+        this.errorId = errorId;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeInt(errorId);
+        dest.writeString(message);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpError> CREATOR = new Creator<OpenPgpError>() {
+        public OpenPgpError createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpError error = new OpenPgpError();
+            error.errorId = source.readInt();
+            error.message = source.readString();
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return error;
+        }
+
+        public OpenPgpError[] newArray(final int size) {
+            return new OpenPgpError[size];
+        }
+    };
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpMetadata.java b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpMetadata.java
new file mode 100644
index 0000000..d620a57
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpMetadata.java
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2014-2015 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.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpMetadata implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 1;
+
+    String filename;
+    String mimeType;
+    long modificationTime;
+    long originalSize;
+
+    public String getFilename() {
+        return filename;
+    }
+
+    public String getMimeType() {
+        return mimeType;
+    }
+
+    public long getModificationTime() {
+        return modificationTime;
+    }
+
+    public long getOriginalSize() {
+        return originalSize;
+    }
+
+    public OpenPgpMetadata() {
+    }
+
+    public OpenPgpMetadata(String filename, String mimeType, long modificationTime,
+                           long originalSize) {
+        this.filename = filename;
+        this.mimeType = mimeType;
+        this.modificationTime = modificationTime;
+        this.originalSize = originalSize;
+    }
+
+    public OpenPgpMetadata(OpenPgpMetadata b) {
+        this.filename = b.filename;
+        this.mimeType = b.mimeType;
+        this.modificationTime = b.modificationTime;
+        this.originalSize = b.originalSize;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeString(filename);
+        dest.writeString(mimeType);
+        dest.writeLong(modificationTime);
+        dest.writeLong(originalSize);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpMetadata> CREATOR = new Creator<OpenPgpMetadata>() {
+        public OpenPgpMetadata createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpMetadata vr = new OpenPgpMetadata();
+            vr.filename = source.readString();
+            vr.mimeType = source.readString();
+            vr.modificationTime = source.readLong();
+            vr.originalSize = source.readLong();
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return vr;
+        }
+
+        public OpenPgpMetadata[] newArray(final int size) {
+            return new OpenPgpMetadata[size];
+        }
+    };
+
+    @Override
+    public String toString() {
+        String out = "\nfilename: " + filename;
+        out += "\nmimeType: " + mimeType;
+        out += "\nmodificationTime: " + modificationTime;
+        out += "\noriginalSize: " + originalSize;
+        return out;
+    }
+
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
new file mode 100644
index 0000000..6b5045d
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/OpenPgpSignatureResult.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2014-2015 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.os.Parcel;
+import android.os.Parcelable;
+
+import org.openintents.openpgp.util.OpenPgpUtils;
+
+import java.util.ArrayList;
+
+/**
+ * Parcelable versioning has been copied from Dashclock Widget
+ * https://code.google.com/p/dashclock/source/browse/api/src/main/java/com/google/android/apps/dashclock/api/ExtensionData.java
+ */
+public class OpenPgpSignatureResult implements Parcelable {
+    /**
+     * Since there might be a case where new versions of the client using the library getting
+     * old versions of the protocol (and thus old versions of this class), we need a versioning
+     * system for the parcels sent between the clients and the providers.
+     */
+    public static final int PARCELABLE_VERSION = 2;
+
+    // generic error on signature verification
+    public static final int SIGNATURE_ERROR = 0;
+    // successfully verified signature, with certified key
+    public static final int SIGNATURE_SUCCESS_CERTIFIED = 1;
+    // no key was found for this signature verification
+    public static final int SIGNATURE_KEY_MISSING = 2;
+    // successfully verified signature, but with uncertified key
+    public static final int SIGNATURE_SUCCESS_UNCERTIFIED = 3;
+    // key has been revoked
+    public static final int SIGNATURE_KEY_REVOKED = 4;
+    // key is expired
+    public static final int SIGNATURE_KEY_EXPIRED = 5;
+
+    int status;
+    boolean signatureOnly;
+    String primaryUserId;
+    ArrayList<String> userIds;
+    long keyId;
+
+    public int getStatus() {
+        return status;
+    }
+
+    public void setStatus(int status) {
+        this.status = status;
+    }
+
+    public boolean isSignatureOnly() {
+        return signatureOnly;
+    }
+
+    public void setSignatureOnly(boolean signatureOnly) {
+        this.signatureOnly = signatureOnly;
+    }
+
+    public String getPrimaryUserId() {
+        return primaryUserId;
+    }
+
+    public void setPrimaryUserId(String primaryUserId) {
+        this.primaryUserId = primaryUserId;
+    }
+
+    public ArrayList<String> getUserIds() {
+        return userIds;
+    }
+
+    public void setUserIds(ArrayList<String> userIds) {
+        this.userIds = userIds;
+    }
+
+    public long getKeyId() {
+        return keyId;
+    }
+
+    public void setKeyId(long keyId) {
+        this.keyId = keyId;
+    }
+
+    public OpenPgpSignatureResult() {
+
+    }
+
+    public OpenPgpSignatureResult(int signatureStatus, String signatureUserId,
+                                  boolean signatureOnly, long keyId, ArrayList<String> userIds) {
+        this.status = signatureStatus;
+        this.signatureOnly = signatureOnly;
+        this.primaryUserId = signatureUserId;
+        this.keyId = keyId;
+        this.userIds = userIds;
+    }
+
+    public OpenPgpSignatureResult(OpenPgpSignatureResult b) {
+        this.status = b.status;
+        this.primaryUserId = b.primaryUserId;
+        this.signatureOnly = b.signatureOnly;
+        this.keyId = b.keyId;
+        this.userIds = b.userIds;
+    }
+
+    public int describeContents() {
+        return 0;
+    }
+
+    public void writeToParcel(Parcel dest, int flags) {
+        /**
+         * NOTE: When adding fields in the process of updating this API, make sure to bump
+         * {@link #PARCELABLE_VERSION}.
+         */
+        dest.writeInt(PARCELABLE_VERSION);
+        // Inject a placeholder that will store the parcel size from this point on
+        // (not including the size itself).
+        int sizePosition = dest.dataPosition();
+        dest.writeInt(0);
+        int startPosition = dest.dataPosition();
+        // version 1
+        dest.writeInt(status);
+        dest.writeByte((byte) (signatureOnly ? 1 : 0));
+        dest.writeString(primaryUserId);
+        dest.writeLong(keyId);
+        // version 2
+        dest.writeStringList(userIds);
+        // Go back and write the size
+        int parcelableSize = dest.dataPosition() - startPosition;
+        dest.setDataPosition(sizePosition);
+        dest.writeInt(parcelableSize);
+        dest.setDataPosition(startPosition + parcelableSize);
+    }
+
+    public static final Creator<OpenPgpSignatureResult> CREATOR = new Creator<OpenPgpSignatureResult>() {
+        public OpenPgpSignatureResult createFromParcel(final Parcel source) {
+            int parcelableVersion = source.readInt();
+            int parcelableSize = source.readInt();
+            int startPosition = source.dataPosition();
+
+            OpenPgpSignatureResult vr = new OpenPgpSignatureResult();
+            vr.status = source.readInt();
+            vr.signatureOnly = source.readByte() == 1;
+            vr.primaryUserId = source.readString();
+            vr.keyId = source.readLong();
+            vr.userIds = new ArrayList<String>();
+            source.readStringList(vr.userIds);
+
+            // skip over all fields added in future versions of this parcel
+            source.setDataPosition(startPosition + parcelableSize);
+
+            return vr;
+        }
+
+        public OpenPgpSignatureResult[] newArray(final int size) {
+            return new OpenPgpSignatureResult[size];
+        }
+    };
+
+    @Override
+    public String toString() {
+        String out = "\nstatus: " + status;
+        out += "\nprimaryUserId: " + primaryUserId;
+        out += "\nuserIds: " + userIds;
+        out += "\nsignatureOnly: " + signatureOnly;
+        out += "\nkeyId: " + OpenPgpUtils.convertKeyIdToHex(keyId);
+        return out;
+    }
+
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpApi.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpApi.java
new file mode 100644
index 0000000..cd1edc5
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpApi.java
@@ -0,0 +1,411 @@
+/*
+ * Copyright (C) 2014-2015 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.annotation.TargetApi;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import org.openintents.openpgp.IOpenPgpService;
+import org.openintents.openpgp.OpenPgpError;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+public class OpenPgpApi {
+
+    public static final String TAG = "OpenPgp API";
+
+    public static final String SERVICE_INTENT = "org.openintents.openpgp.IOpenPgpService";
+
+    /**
+     * Version history
+     * ---------------
+     * <p/>
+     * 3:
+     * - First public stable version
+     * <p/>
+     * 4:
+     * - No changes to existing methods -> backward compatible
+     * - Introduction of ACTION_DECRYPT_METADATA, RESULT_METADATA, EXTRA_ORIGINAL_FILENAME, and OpenPgpMetadata parcel
+     * - Introduction of internal NFC extras: EXTRA_NFC_SIGNED_HASH, EXTRA_NFC_SIG_CREATION_TIMESTAMP
+     * 5:
+     * - OpenPgpSignatureResult: new consts SIGNATURE_KEY_REVOKED and SIGNATURE_KEY_EXPIRED
+     * - OpenPgpSignatureResult: ArrayList<String> userIds
+     * 6:
+     * - Deprecate ACTION_SIGN
+     * - Introduce ACTION_CLEARTEXT_SIGN and ACTION_DETACHED_SIGN
+     * - New extra for ACTION_DETACHED_SIGN: EXTRA_DETACHED_SIGNATURE
+     * - New result for ACTION_DECRYPT_VERIFY: RESULT_DETACHED_SIGNATURE
+     * - New result for ACTION_DECRYPT_VERIFY: RESULT_CHARSET
+     * 7:
+     * - Deprecation of ACCOUNT_NAME, please use ACTION_GET_SIGN_KEY_ID to get key id
+     * - Introduce EXTRA_SIGN_KEY_ID
+     * - New extra for ACTION_ENCRYPT and ACTION_SIGN_AND_ENCRYPT: EXTRA_ENABLE_COMPRESSION (default to true)
+     * - Return PendingIntent to view key for signatures
+     * - New result for ACTION_DECRYPT_VERIFY: RESULT_TYPE
+     * - New ACTION_GET_SIGN_KEY_ID
+     * - EXTRA_PASSPHRASE changed from String to char[]
+     */
+    public static final int API_VERSION = 7;
+
+    /**
+     * General extras
+     * --------------
+     *
+     * required extras:
+     * int           EXTRA_API_VERSION           (always required)
+     *
+     * returned extras:
+     * int           RESULT_CODE                 (RESULT_CODE_ERROR, RESULT_CODE_SUCCESS or RESULT_CODE_USER_INTERACTION_REQUIRED)
+     * OpenPgpError  RESULT_ERROR                (if RESULT_CODE == RESULT_CODE_ERROR)
+     * PendingIntent RESULT_INTENT               (if RESULT_CODE == RESULT_CODE_USER_INTERACTION_REQUIRED)
+     */
+
+    /**
+     * DEPRECATED
+     * Same as ACTION_CLEARTEXT_SIGN
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (DEPRECATED: this makes no sense here)
+     * char[]        EXTRA_PASSPHRASE            (key passphrase)
+     */
+    public static final String ACTION_SIGN = "org.openintents.openpgp.action.SIGN";
+
+    /**
+     * Sign text resulting in a cleartext signature
+     * Some magic pre-processing of the text is done to convert it to a format usable for
+     * cleartext signatures per RFC 4880 before the text is actually signed:
+     * - end cleartext with newline
+     * - remove whitespaces on line endings
+     * <p/>
+     * required extras:
+     * long          EXTRA_SIGN_KEY_ID           (key id of signing key)
+     * <p/>
+     * optional extras:
+     * char[]        EXTRA_PASSPHRASE            (key passphrase)
+     */
+    public static final String ACTION_CLEARTEXT_SIGN = "org.openintents.openpgp.action.CLEARTEXT_SIGN";
+
+    /**
+     * Sign text or binary data resulting in a detached signature.
+     * No OutputStream necessary for ACTION_DETACHED_SIGN (No magic pre-processing like in ACTION_CLEARTEXT_SIGN)!
+     * The detached signature is returned separately in RESULT_DETACHED_SIGNATURE.
+     * <p/>
+     * required extras:
+     * long          EXTRA_SIGN_KEY_ID           (key id of signing key)
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for detached signature)
+     * char[]        EXTRA_PASSPHRASE            (key passphrase)
+     * <p/>
+     * returned extras:
+     * byte[]        RESULT_DETACHED_SIGNATURE
+     */
+    public static final String ACTION_DETACHED_SIGN = "org.openintents.openpgp.action.DETACHED_SIGN";
+
+    /**
+     * Encrypt
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS              (=emails of recipients, if more than one key has a user_id, a PendingIntent is returned via RESULT_INTENT)
+     * or
+     * long[]        EXTRA_KEY_IDS
+     * <p/>
+     * optional extras:
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * char[]        EXTRA_PASSPHRASE            (key passphrase)
+     * String        EXTRA_ORIGINAL_FILENAME     (original filename to be encrypted as metadata)
+     * boolean       EXTRA_ENABLE_COMPRESSION    (enable ZLIB compression, default ist true)
+     */
+    public static final String ACTION_ENCRYPT = "org.openintents.openpgp.action.ENCRYPT";
+
+    /**
+     * Sign and encrypt
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS              (=emails of recipients, if more than one key has a user_id, a PendingIntent is returned via RESULT_INTENT)
+     * or
+     * long[]        EXTRA_KEY_IDS
+     * <p/>
+     * optional extras:
+     * long          EXTRA_SIGN_KEY_ID           (key id of signing key)
+     * boolean       EXTRA_REQUEST_ASCII_ARMOR   (request ascii armor for output)
+     * char[]        EXTRA_PASSPHRASE            (key passphrase)
+     * String        EXTRA_ORIGINAL_FILENAME     (original filename to be encrypted as metadata)
+     * boolean       EXTRA_ENABLE_COMPRESSION    (enable ZLIB compression, default ist true)
+     */
+    public static final String ACTION_SIGN_AND_ENCRYPT = "org.openintents.openpgp.action.SIGN_AND_ENCRYPT";
+
+    /**
+     * Decrypts and verifies given input stream. This methods handles encrypted-only, signed-and-encrypted,
+     * and also signed-only input.
+     * OutputStream is optional, e.g., for verifying detached signatures!
+     * <p/>
+     * If OpenPgpSignatureResult.getStatus() == OpenPgpSignatureResult.SIGNATURE_KEY_MISSING
+     * in addition a PendingIntent is returned via RESULT_INTENT to download missing keys.
+     * On all other status, in addition a PendingIntent is returned via RESULT_INTENT to open
+     * the key view in OpenKeychain.
+     * <p/>
+     * optional extras:
+     * byte[]        EXTRA_DETACHED_SIGNATURE    (detached signature)
+     * <p/>
+     * returned extras:
+     * OpenPgpSignatureResult   RESULT_SIGNATURE
+     * OpenPgpDecryptMetadata   RESULT_METADATA
+     * String                   RESULT_CHARSET   (charset which was specified in the headers of ascii armored input, if any)
+     * int                      RESULT_TYPE
+     */
+    public static final String ACTION_DECRYPT_VERIFY = "org.openintents.openpgp.action.DECRYPT_VERIFY";
+
+    /**
+     * Decrypts the header of an encrypted file to retrieve metadata such as original filename.
+     * <p/>
+     * This does not decrypt the actual content of the file.
+     * <p/>
+     * returned extras:
+     * OpenPgpDecryptMetadata   RESULT_METADATA
+     * String                   RESULT_CHARSET   (charset which was specified in the headers of ascii armored input, if any)
+     */
+    public static final String ACTION_DECRYPT_METADATA = "org.openintents.openpgp.action.DECRYPT_METADATA";
+
+    /**
+     * Select key id for signing
+     * <p/>
+     * optional extras:
+     * String      EXTRA_USER_ID
+     * <p/>
+     * returned extras:
+     * long        EXTRA_SIGN_KEY_ID
+     */
+    public static final String ACTION_GET_SIGN_KEY_ID = "org.openintents.openpgp.action.GET_SIGN_KEY_ID";
+
+    /**
+     * Get key ids based on given user ids (=emails)
+     * <p/>
+     * required extras:
+     * String[]      EXTRA_USER_IDS
+     * <p/>
+     * returned extras:
+     * long[]        RESULT_KEY_IDS
+     */
+    public static final String ACTION_GET_KEY_IDS = "org.openintents.openpgp.action.GET_KEY_IDS";
+
+    /**
+     * This action returns RESULT_CODE_SUCCESS if the OpenPGP Provider already has the key
+     * corresponding to the given key id in its database.
+     * <p/>
+     * It returns RESULT_CODE_USER_INTERACTION_REQUIRED if the Provider does not have the key.
+     * The PendingIntent from RESULT_INTENT can be used to retrieve those from a keyserver.
+     * <p/>
+     * required extras:
+     * long        EXTRA_KEY_ID
+     */
+    public static final String ACTION_GET_KEY = "org.openintents.openpgp.action.GET_KEY";
+
+
+    /* Intent extras */
+    public static final String EXTRA_API_VERSION = "api_version";
+
+    // DEPRECATED!!!
+    public static final String EXTRA_ACCOUNT_NAME = "account_name";
+
+    // ACTION_DETACHED_SIGN, ENCRYPT, SIGN_AND_ENCRYPT, DECRYPT_VERIFY
+    // 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 EXTRA_REQUEST_ASCII_ARMOR = "ascii_armor";
+
+    // ACTION_DETACHED_SIGN
+    public static final String RESULT_DETACHED_SIGNATURE = "detached_signature";
+
+    // ENCRYPT, SIGN_AND_ENCRYPT
+    public static final String EXTRA_USER_IDS = "user_ids";
+    public static final String EXTRA_KEY_IDS = "key_ids";
+    public static final String EXTRA_SIGN_KEY_ID = "sign_key_id";
+    // optional extras:
+    public static final String EXTRA_PASSPHRASE = "passphrase";
+    public static final String EXTRA_ORIGINAL_FILENAME = "original_filename";
+    public static final String EXTRA_ENABLE_COMPRESSION = "enable_compression";
+
+    // GET_SIGN_KEY_ID
+    public static final String EXTRA_USER_ID = "user_id";
+
+    // GET_KEY
+    public static final String EXTRA_KEY_ID = "key_id";
+    public static final String RESULT_KEY_IDS = "key_ids";
+
+    /* Service Intent returns */
+    public static final String RESULT_CODE = "result_code";
+
+    // get actual error object from RESULT_ERROR
+    public static final int RESULT_CODE_ERROR = 0;
+    // success!
+    public static final int RESULT_CODE_SUCCESS = 1;
+    // get PendingIntent from RESULT_INTENT, start PendingIntent with startIntentSenderForResult,
+    // and execute service method again in onActivityResult
+    public static final int RESULT_CODE_USER_INTERACTION_REQUIRED = 2;
+
+    public static final String RESULT_ERROR = "error";
+    public static final String RESULT_INTENT = "intent";
+
+    // DECRYPT_VERIFY
+    public static final String EXTRA_DETACHED_SIGNATURE = "detached_signature";
+    public static final String RESULT_SIGNATURE = "signature";
+    public static final String RESULT_METADATA = "metadata";
+    // This will be the charset which was specified in the headers of ascii armored input, if any
+    public static final String RESULT_CHARSET = "charset";
+
+    public static final String RESULT_TYPE = "type";
+    public static final int RESULT_TYPE_UNENCRYPTED_UNSIGNED = 0;
+    public static final int RESULT_TYPE_ENCRYPTED = 1;
+    public static final int RESULT_TYPE_SIGNED = 2;
+
+    // INTERNAL, should not be used
+    public static final String EXTRA_CALL_UUID1 = "call_uuid1";
+    public static final String EXTRA_CALL_UUID2 = "call_uuid2";
+
+    IOpenPgpService mService;
+    Context mContext;
+
+    public OpenPgpApi(Context context, IOpenPgpService service) {
+        this.mContext = context;
+        this.mService = service;
+    }
+
+    public interface IOpenPgpCallback {
+        void onReturn(final Intent result);
+    }
+
+    private class OpenPgpAsyncTask extends AsyncTask<Void, Integer, Intent> {
+        Intent data;
+        InputStream is;
+        OutputStream os;
+        IOpenPgpCallback callback;
+
+        private OpenPgpAsyncTask(Intent data, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+            this.data = data;
+            this.is = is;
+            this.os = os;
+            this.callback = callback;
+        }
+
+        @Override
+        protected Intent doInBackground(Void... unused) {
+            return executeApi(data, is, os);
+        }
+
+        protected void onPostExecute(Intent result) {
+            callback.onReturn(result);
+        }
+
+    }
+
+    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+    public void executeApiAsync(Intent data, InputStream is, OutputStream os, IOpenPgpCallback callback) {
+        OpenPgpAsyncTask task = new OpenPgpAsyncTask(data, is, os, callback);
+
+        // don't serialize async tasks!
+        // http://commonsware.com/blog/2012/04/20/asynctask-threading-regression-confirmed.html
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
+            task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
+        } else {
+            task.execute((Void[]) null);
+        }
+    }
+
+    /**
+     * InputStream and OutputStreams are always closed after operating on them!
+     *
+     * @param data
+     * @param is
+     * @param os
+     * @return
+     */
+    public Intent executeApi(Intent data, InputStream is, OutputStream os) {
+        ParcelFileDescriptor input = null;
+        ParcelFileDescriptor output = null;
+        try {
+            // always send version from client
+            data.putExtra(EXTRA_API_VERSION, OpenPgpApi.API_VERSION);
+
+            Intent result;
+
+            // pipe the input and output
+            if (is != null) {
+                input = ParcelFileDescriptorUtil.pipeFrom(is,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                //Log.d(OpenPgpApi.TAG, "Copy to service finished");
+                            }
+                        }
+                );
+            }
+            if (os != null) {
+                output = ParcelFileDescriptorUtil.pipeTo(os,
+                        new ParcelFileDescriptorUtil.IThreadListener() {
+
+                            @Override
+                            public void onThreadFinished(Thread thread) {
+                                //Log.d(OpenPgpApi.TAG, "Service finished writing!");
+                            }
+                        }
+                );
+            }
+
+            // blocks until result is ready
+            result = mService.execute(data, input, output);
+
+            // set class loader to current context to allow unparcelling
+            // of OpenPgpError and OpenPgpSignatureResult
+            // http://stackoverflow.com/a/3806769
+            result.setExtrasClassLoader(mContext.getClassLoader());
+
+            return result;
+        } catch (Exception e) {
+            Log.e(OpenPgpApi.TAG, "Exception in executeApi call", e);
+            Intent result = new Intent();
+            result.putExtra(RESULT_CODE, RESULT_CODE_ERROR);
+            result.putExtra(RESULT_ERROR,
+                    new OpenPgpError(OpenPgpError.CLIENT_SIDE_ERROR, e.getMessage()));
+            return result;
+        } finally {
+            // close() is required to halt the TransferThread
+            if (output != null) {
+                try {
+                    output.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpApi.TAG, "IOException when closing ParcelFileDescriptor!", e);
+                }
+            }
+            if (input != null) {
+                try {
+                    input.close();
+                } catch (IOException e) {
+                    Log.e(OpenPgpApi.TAG, "IOException when closing ParcelFileDescriptor!", e);
+                }
+            }
+        }
+    }
+
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpAppPreference.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpAppPreference.java
new file mode 100644
index 0000000..4bf4cec
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpAppPreference.java
@@ -0,0 +1,327 @@
+/*
+ * Copyright (C) 2014-2015 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.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.preference.DialogPreference;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+import org.openintents.openpgp.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 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 OpenPgpAppPreference extends DialogPreference {
+    private static final String OPENKEYCHAIN_PACKAGE = "org.sufficientlysecure.keychain";
+    private static final String MARKET_INTENT_URI_BASE = "market://details?id=%s";
+    private static final Intent MARKET_INTENT = new Intent(Intent.ACTION_VIEW, Uri.parse(
+            String.format(MARKET_INTENT_URI_BASE, OPENKEYCHAIN_PACKAGE)));
+
+    private static final ArrayList<String> PROVIDER_BLACKLIST = new ArrayList<String>();
+
+    static {
+        // Unfortunately, the current released version of APG includes a broken version of the API
+        PROVIDER_BLACKLIST.add("org.thialfihar.android.apg");
+    }
+
+    private ArrayList<OpenPgpProviderEntry> mLegacyList = new ArrayList<>();
+    private ArrayList<OpenPgpProviderEntry> mList = new ArrayList<>();
+
+    private String mSelectedPackage;
+
+    public OpenPgpAppPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        populateAppList();
+    }
+
+    public OpenPgpAppPreference(Context context) {
+        this(context, null);
+    }
+
+    /**
+     * Public method to add new entries for legacy applications
+     *
+     * @param packageName
+     * @param simpleName
+     * @param icon
+     */
+    public void addLegacyProvider(int position, String packageName, String simpleName, Drawable icon) {
+        mLegacyList.add(position, new OpenPgpProviderEntry(packageName, simpleName, icon));
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(Builder builder) {
+
+        // do again, maybe an app has now been installed
+        populateAppList();
+
+        // Init ArrayAdapter with OpenPGP Providers
+        ListAdapter adapter = new ArrayAdapter<OpenPgpProviderEntry>(getContext(),
+                android.R.layout.select_dialog_singlechoice, android.R.id.text1, mList) {
+            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);
+
+                // Put the image on the TextView
+                tv.setCompoundDrawablesWithIntrinsicBounds(mList.get(position).icon, null,
+                        null, null);
+
+                // Add margin between image and text (support various screen densities)
+                int dp10 = (int) (10 * getContext().getResources().getDisplayMetrics().density + 0.5f);
+                tv.setCompoundDrawablePadding(dp10);
+
+                return v;
+            }
+        };
+
+        builder.setSingleChoiceItems(adapter, getIndexOfProviderList(mSelectedPackage),
+                new DialogInterface.OnClickListener() {
+
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        OpenPgpProviderEntry entry = mList.get(which);
+
+                        if (entry.intent != null) {
+                            /*
+                             * Intents are called as activity
+                             *
+                             * Current approach is to assume the user installed the app.
+                             * If he does not, the selected package is not valid.
+                             *
+                             * However  applications should always consider this could happen,
+                             * as the user might remove the currently used OpenPGP app.
+                             */
+                            getContext().startActivity(entry.intent);
+                            return;
+                        }
+
+                        mSelectedPackage = entry.packageName;
+
+                        /*
+                         * Clicking on an item simulates the positive button click, and dismisses
+                         * the dialog.
+                         */
+                        OpenPgpAppPreference.this.onClick(dialog, DialogInterface.BUTTON_POSITIVE);
+                        dialog.dismiss();
+                    }
+                });
+
+        /*
+         * The typical interaction for list-based dialogs is to have click-on-an-item dismiss the
+         * dialog instead of the user having to press 'Ok'.
+         */
+        builder.setPositiveButton(null, null);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+
+        if (positiveResult && (mSelectedPackage != null)) {
+            save();
+        }
+    }
+
+    private void save() {
+        // Give the client a chance to ignore this change if they deem it
+        // invalid
+        if (!callChangeListener(mSelectedPackage)) {
+            // They don't want the value to be set
+            return;
+        }
+
+        setAndPersist(mSelectedPackage);
+    }
+
+    private void setAndPersist(String packageName) {
+        mSelectedPackage = packageName;
+
+        // Save to persistent storage (this method will make sure this
+        // preference should be persistent, along with other useful checks)
+        persistString(mSelectedPackage);
+
+        // Data has changed, notify so UI can be refreshed!
+        notifyChanged();
+
+        // also update summary with selected provider
+        updateSummary(mSelectedPackage);
+    }
+
+    private void updateSummary(String packageName) {
+        String summary = getEntryByValue(packageName);
+        setSummary(summary);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return getEntryByValue(mSelectedPackage);
+    }
+
+    private int getIndexOfProviderList(String packageName) {
+        for (OpenPgpProviderEntry app : mList) {
+            if (app.packageName.equals(packageName)) {
+                return mList.indexOf(app);
+            }
+        }
+
+        // default is "none"
+        return 0;
+    }
+
+    /**
+     * Public API
+     */
+    public String getEntry() {
+        return getEntryByValue(mSelectedPackage);
+    }
+
+    /**
+     * Public API
+     */
+    public String getValue() {
+        return mSelectedPackage;
+    }
+
+    /**
+     * Public API
+     */
+    public void setValue(String packageName) {
+        setAndPersist(packageName);
+    }
+
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        return a.getString(index);
+    }
+
+    @Override
+    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
+        if (restoreValue) {
+            // Restore state
+            mSelectedPackage = getPersistedString(mSelectedPackage);
+            updateSummary(mSelectedPackage);
+        } else {
+            String value = (String) defaultValue;
+            setAndPersist(value);
+            updateSummary(value);
+        }
+    }
+
+    public String getEntryByValue(String packageName) {
+        for (OpenPgpProviderEntry app : mList) {
+            if (app.packageName.equals(packageName) && app.intent == null) {
+                return app.simpleName;
+            }
+        }
+
+        return getContext().getString(R.string.openpgp_list_preference_none);
+    }
+
+    private void populateAppList() {
+        mList.clear();
+
+        // add "none"-entry
+        mList.add(0, new OpenPgpProviderEntry("",
+                getContext().getString(R.string.openpgp_list_preference_none),
+                getContext().getResources().getDrawable(R.drawable.ic_action_cancel_launchersize)));
+
+        // add all additional (legacy) providers
+        mList.addAll(mLegacyList);
+
+        // search for OpenPGP providers...
+        ArrayList<OpenPgpProviderEntry> providerList = new ArrayList<>();
+        Intent intent = new Intent(OpenPgpApi.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());
+
+                if (!PROVIDER_BLACKLIST.contains(packageName)) {
+                    providerList.add(new OpenPgpProviderEntry(packageName, simpleName, icon));
+                }
+            }
+        }
+
+        if (providerList.isEmpty()) {
+            // add install links if provider list is empty
+            resInfo = getContext().getPackageManager().queryIntentActivities
+                    (MARKET_INTENT, 0);
+            for (ResolveInfo resolveInfo : resInfo) {
+                Intent marketIntent = new Intent(MARKET_INTENT);
+                marketIntent.setPackage(resolveInfo.activityInfo.packageName);
+                Drawable icon = resolveInfo.activityInfo.loadIcon(getContext().getPackageManager());
+                String marketName = String.valueOf(resolveInfo.activityInfo.applicationInfo
+                        .loadLabel(getContext().getPackageManager()));
+                String simpleName = String.format(getContext().getString(R.string
+                        .openpgp_install_openkeychain_via), marketName);
+                mList.add(new OpenPgpProviderEntry(OPENKEYCHAIN_PACKAGE, simpleName,
+                        icon, marketIntent));
+            }
+        } else {
+            // add provider
+            mList.addAll(providerList);
+        }
+    }
+
+    private static class OpenPgpProviderEntry {
+        private String packageName;
+        private String simpleName;
+        private Drawable icon;
+        private Intent intent;
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon) {
+            this.packageName = packageName;
+            this.simpleName = simpleName;
+            this.icon = icon;
+        }
+
+        public OpenPgpProviderEntry(String packageName, String simpleName, Drawable icon, Intent intent) {
+            this(packageName, simpleName, icon);
+            this.intent = intent;
+        }
+
+        @Override
+        public String toString() {
+            return simpleName;
+        }
+    }
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpKeyPreference.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpKeyPreference.java
new file mode 100644
index 0000000..6343285
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpKeyPreference.java
@@ -0,0 +1,285 @@
+/*
+ * Copyright (C) 2015 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.app.Activity;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentSender;
+import android.content.res.TypedArray;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.preference.Preference;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.util.Log;
+
+import org.openintents.openpgp.IOpenPgpService;
+import org.openintents.openpgp.OpenPgpError;
+import org.openintents.openpgp.R;
+
+public class OpenPgpKeyPreference extends Preference {
+    private long mKeyId;
+    private String mOpenPgpProvider;
+    private OpenPgpServiceConnection mServiceConnection;
+    private String mDefaultUserId;
+
+    public static final int REQUEST_CODE_KEY_PREFERENCE = 9999;
+
+    public OpenPgpKeyPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return (mKeyId == 0) ? getContext().getString(R.string.openpgp_no_key_selected)
+                : getContext().getString(R.string.openpgp_key_selected);
+    }
+
+    private void updateEnabled() {
+        if (TextUtils.isEmpty(mOpenPgpProvider)) {
+            setEnabled(false);
+        } else {
+            setEnabled(true);
+        }
+    }
+
+    public void setOpenPgpProvider(String packageName) {
+        mOpenPgpProvider = packageName;
+        updateEnabled();
+    }
+
+    public void setDefaultUserId(String userId) {
+        mDefaultUserId = userId;
+    }
+
+    @Override
+    protected void onClick() {
+        // bind to service
+        mServiceConnection = new OpenPgpServiceConnection(
+                getContext().getApplicationContext(),
+                mOpenPgpProvider,
+                new OpenPgpServiceConnection.OnBound() {
+                    @Override
+                    public void onBound(IOpenPgpService service) {
+                        Log.d(OpenPgpApi.TAG, "onBound!");
+
+                        Intent data = new Intent();
+                        data.setAction(OpenPgpApi.ACTION_GET_SIGN_KEY_ID);
+                        data.putExtra(OpenPgpApi.EXTRA_USER_ID, mDefaultUserId);
+
+                        OpenPgpApi api = new OpenPgpApi(getContext(), mServiceConnection.getService());
+                        api.executeApiAsync(data, null, null, new MyCallback(REQUEST_CODE_KEY_PREFERENCE));
+                    }
+
+                    @Override
+                    public void onError(Exception e) {
+                        Log.e(OpenPgpApi.TAG, "exception when binding!", e);
+                    }
+                }
+        );
+        mServiceConnection.bindToService();
+    }
+
+    private class MyCallback implements OpenPgpApi.IOpenPgpCallback {
+        int requestCode;
+
+        private MyCallback(int requestCode) {
+            this.requestCode = requestCode;
+        }
+
+        @Override
+        public void onReturn(Intent result) {
+            switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) {
+                case OpenPgpApi.RESULT_CODE_SUCCESS: {
+                    Log.e(OpenPgpApi.TAG, "RESULT_CODE_SUCCESS: Should not happen!");
+
+                    break;
+                }
+                case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: {
+
+                    PendingIntent pi = result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
+                    try {
+                        Activity act = (Activity) getContext();
+                        act.startIntentSenderFromChild(
+                                act, pi.getIntentSender(),
+                                requestCode, null, 0, 0, 0);
+                    } catch (IntentSender.SendIntentException e) {
+                        Log.e(OpenPgpApi.TAG, "SendIntentException", e);
+                    }
+                    break;
+                }
+                case OpenPgpApi.RESULT_CODE_ERROR: {
+                    OpenPgpError error = result.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
+                    Log.e(OpenPgpApi.TAG, "RESULT_CODE_ERROR: " + error.getMessage());
+
+                    break;
+                }
+            }
+        }
+    }
+
+    private void save(long newValue) {
+        // Give the client a chance to ignore this change if they deem it
+        // invalid
+        if (!callChangeListener(newValue)) {
+            // They don't want the value to be set
+            return;
+        }
+
+        setAndPersist(newValue);
+    }
+
+    /**
+     * Public API
+     */
+    public void setValue(long keyId) {
+        setAndPersist(keyId);
+    }
+
+    /**
+     * Public API
+     */
+    public long getValue() {
+        return mKeyId;
+    }
+
+    private void setAndPersist(long newValue) {
+        mKeyId = newValue;
+
+        // Save to persistent storage (this method will make sure this
+        // preference should be persistent, along with other useful checks)
+        persistLong(mKeyId);
+
+        // Data has changed, notify so UI can be refreshed!
+        notifyChanged();
+    }
+
+    @Override
+    protected Object onGetDefaultValue(TypedArray a, int index) {
+        // This preference type's value type is Long, so we read the default
+        // value from the attributes as an Integer.
+        return (long) a.getInteger(index, 0);
+    }
+
+    @Override
+    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
+        if (restoreValue) {
+            // Restore state
+            mKeyId = getPersistedLong(mKeyId);
+        } else {
+            // Set state
+            long value = (Long) defaultValue;
+            setAndPersist(value);
+        }
+    }
+
+    @Override
+    protected Parcelable onSaveInstanceState() {
+        /*
+         * Suppose a client uses this preference type without persisting. We
+         * must save the instance state so it is able to, for example, survive
+         * orientation changes.
+         */
+
+        final Parcelable superState = super.onSaveInstanceState();
+        if (isPersistent()) {
+            // No need to save instance state since it's persistent
+            return superState;
+        }
+
+        // Save the instance state
+        final SavedState myState = new SavedState(superState);
+        myState.keyId = mKeyId;
+        myState.openPgpProvider = mOpenPgpProvider;
+        myState.defaultUserId = mDefaultUserId;
+        return myState;
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Parcelable state) {
+        if (!state.getClass().equals(SavedState.class)) {
+            // Didn't save state for us in onSaveInstanceState
+            super.onRestoreInstanceState(state);
+            return;
+        }
+
+        // Restore the instance state
+        SavedState myState = (SavedState) state;
+        super.onRestoreInstanceState(myState.getSuperState());
+        mKeyId = myState.keyId;
+        mOpenPgpProvider = myState.openPgpProvider;
+        mDefaultUserId = myState.defaultUserId;
+        notifyChanged();
+    }
+
+    /**
+     * SavedState, a subclass of {@link BaseSavedState}, will store the state
+     * of MyPreference, a subclass of Preference.
+     * <p/>
+     * It is important to always call through to super methods.
+     */
+    private static class SavedState extends BaseSavedState {
+        long keyId;
+        String openPgpProvider;
+        String defaultUserId;
+
+        public SavedState(Parcel source) {
+            super(source);
+
+            keyId = source.readInt();
+            openPgpProvider = source.readString();
+            defaultUserId = source.readString();
+        }
+
+        @Override
+        public void writeToParcel(Parcel dest, int flags) {
+            super.writeToParcel(dest, flags);
+
+            dest.writeLong(keyId);
+            dest.writeString(openPgpProvider);
+            dest.writeString(defaultUserId);
+        }
+
+        public SavedState(Parcelable superState) {
+            super(superState);
+        }
+
+        public static final Parcelable.Creator<SavedState> CREATOR =
+                new Parcelable.Creator<SavedState>() {
+                    public SavedState createFromParcel(Parcel in) {
+                        return new SavedState(in);
+                    }
+
+                    public SavedState[] newArray(int size) {
+                        return new SavedState[size];
+                    }
+                };
+    }
+
+    public boolean handleOnActivityResult(int requestCode, int resultCode, Intent data) {
+        if (requestCode == REQUEST_CODE_KEY_PREFERENCE && resultCode == Activity.RESULT_OK) {
+            long keyId = data.getLongExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, 0);
+            save(keyId);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpServiceConnection.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpServiceConnection.java
new file mode 100644
index 0000000..bbc8645
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpServiceConnection.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2014-2015 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.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.IBinder;
+
+import org.openintents.openpgp.IOpenPgpService;
+
+public class OpenPgpServiceConnection {
+
+    // callback interface
+    public interface OnBound {
+        public void onBound(IOpenPgpService service);
+
+        public void onError(Exception e);
+    }
+
+    private Context mApplicationContext;
+
+    private IOpenPgpService mService;
+    private String mProviderPackageName;
+
+    private OnBound mOnBoundListener;
+
+    /**
+     * Create new connection
+     *
+     * @param context
+     * @param providerPackageName specify package name of OpenPGP provider,
+     *                            e.g., "org.sufficientlysecure.keychain"
+     */
+    public OpenPgpServiceConnection(Context context, String providerPackageName) {
+        this.mApplicationContext = context.getApplicationContext();
+        this.mProviderPackageName = providerPackageName;
+    }
+
+    /**
+     * Create new connection with callback
+     *
+     * @param context
+     * @param providerPackageName specify package name of OpenPGP provider,
+     *                            e.g., "org.sufficientlysecure.keychain"
+     * @param onBoundListener     callback, executed when connection to service has been established
+     */
+    public OpenPgpServiceConnection(Context context, String providerPackageName,
+                                    OnBound onBoundListener) {
+        this(context, providerPackageName);
+        this.mOnBoundListener = onBoundListener;
+    }
+
+    public IOpenPgpService getService() {
+        return mService;
+    }
+
+    public boolean isBound() {
+        return (mService != null);
+    }
+
+    private ServiceConnection mServiceConnection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            mService = IOpenPgpService.Stub.asInterface(service);
+            if (mOnBoundListener != null) {
+                mOnBoundListener.onBound(mService);
+            }
+        }
+
+        public void onServiceDisconnected(ComponentName name) {
+            mService = null;
+        }
+    };
+
+    /**
+     * If not already bound, bind to service!
+     *
+     * @return
+     */
+    public void bindToService() {
+        // if not already bound...
+        if (mService == null) {
+            try {
+                Intent serviceIntent = new Intent(OpenPgpApi.SERVICE_INTENT);
+                // NOTE: setPackage is very important to restrict the intent to this provider only!
+                serviceIntent.setPackage(mProviderPackageName);
+                boolean connect = mApplicationContext.bindService(serviceIntent, mServiceConnection,
+                        Context.BIND_AUTO_CREATE);
+                if (!connect) {
+                    throw new Exception("bindService() returned false!");
+                }
+            } catch (Exception e) {
+                if (mOnBoundListener != null) {
+                    mOnBoundListener.onError(e);
+                }
+            }
+        } else {
+            // already bound, but also inform client about it with callback
+            if (mOnBoundListener != null) {
+                mOnBoundListener.onBound(mService);
+            }
+        }
+    }
+
+    public void unbindFromService() {
+        mApplicationContext.unbindService(mServiceConnection);
+    }
+
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpUtils.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpUtils.java
new file mode 100644
index 0000000..ad5f47b
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/OpenPgpUtils.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2014-2015 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.Locale;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.text.TextUtils;
+
+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(OpenPgpApi.SERVICE_INTENT);
+        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
+        return !resInfo.isEmpty();
+    }
+
+    public static String convertKeyIdToHex(long keyId) {
+        return "0x" + convertKeyIdToHex32bit(keyId >> 32) + convertKeyIdToHex32bit(keyId);
+    }
+
+    private static String convertKeyIdToHex32bit(long keyId) {
+        String hexString = Long.toHexString(keyId & 0xffffffffL).toLowerCase(Locale.ENGLISH);
+        while (hexString.length() < 8) {
+            hexString = "0" + hexString;
+        }
+        return hexString;
+    }
+
+
+    private static final Pattern USER_ID_PATTERN = Pattern.compile("^(.*?)(?: \\((.*)\\))?(?: <(.*)>)?$");
+
+    /**
+     * Splits userId string into naming part, email part, and comment part
+     * <p/>
+     * User ID matching:
+     * http://fiddle.re/t4p6f
+     *
+     * @param userId
+     * @return theParsedUserInfo
+     */
+    public static UserId splitUserId(final String userId) {
+        if (!TextUtils.isEmpty(userId)) {
+            final Matcher matcher = USER_ID_PATTERN.matcher(userId);
+            if (matcher.matches()) {
+                return new UserId(matcher.group(1), matcher.group(3), matcher.group(2));
+            }
+        }
+        return new UserId(null, null, null);
+    }
+
+    /**
+     * Returns a composed user id. Returns null if name is null!
+     *
+     * @param name
+     * @param email
+     * @param comment
+     * @return
+     */
+    public static String createUserId(UserId userId) {
+        String userIdString = userId.name; // consider name a required value
+        if (userIdString != null && !TextUtils.isEmpty(userId.comment)) {
+            userIdString += " (" + userId.comment + ")";
+        }
+        if (userIdString != null && !TextUtils.isEmpty(userId.email)) {
+            userIdString += " <" + userId.email + ">";
+        }
+
+        return userIdString;
+    }
+
+    public static class UserId {
+        public final String name;
+        public final String email;
+        public final String comment;
+
+        public UserId(String name, String email, String comment) {
+            this.name = name;
+            this.email = email;
+            this.comment = comment;
+        }
+    }
+}
diff --git a/openpgp-api/src/main/java/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java b/openpgp-api/src/main/java/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
new file mode 100644
index 0000000..b9492f9
--- /dev/null
+++ b/openpgp-api/src/main/java/org/openintents/openpgp/util/ParcelFileDescriptorUtil.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2014-2015 Dominik Schürmann <dominik@dominikschuermann.de>
+ *               2013 Florian Schmaus <flo@geekplace.eu>
+ *
+ * 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 java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Partially based on <a href="http://stackoverflow.com/questions/18212152/">Stackoverflow: Transfer InputStream to another Service (across process boundaries)</a>
+ **/
+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(OpenPgpApi.TAG, "TransferThread" + getId() + ": writing failed", e);
+            } finally {
+                try {
+                    mIn.close();
+                } catch (IOException e) {
+                    //Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
+                }
+                try {
+                    mOut.close();
+                } catch (IOException e) {
+                    //Log.e(OpenPgpApi.TAG, "TransferThread" + getId(), e);
+                }
+            }
+            if (mListener != null) {
+                //Log.d(OpenPgpApi.TAG, "TransferThread " + getId() + " finished!");
+                mListener.onThreadFinished(this);
+            }
+        }
+    }
+}
diff --git a/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize.png b/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 0000000..71b9118
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize.png
diff --git a/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize_light.png b/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 0000000..73b1d08
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-hdpi/ic_action_cancel_launchersize_light.png
diff --git a/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize.png b/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 0000000..270abf4
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize.png
diff --git a/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize_light.png b/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 0000000..d841821
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-mdpi/ic_action_cancel_launchersize_light.png
diff --git a/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize.png b/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 0000000..1e3571f
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize.png
diff --git a/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png b/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 0000000..d505046
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-xhdpi/ic_action_cancel_launchersize_light.png
diff --git a/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize.png b/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
new file mode 100644
index 0000000..5204460
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize.png
diff --git a/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png b/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png
new file mode 100644
index 0000000..d6fb86b
--- /dev/null
+++ b/openpgp-api/src/main/res/drawable-xxhdpi/ic_action_cancel_launchersize_light.png
diff --git a/openpgp-api/src/main/res/values-cs/strings.xml b/openpgp-api/src/main/res/values-cs/strings.xml
new file mode 100644
index 0000000..c9fe1fa
--- /dev/null
+++ b/openpgp-api/src/main/res/values-cs/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Žádný</string>
+  <string name="openpgp_install_openkeychain_via">Instalovat OpenKeychain pomocí %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-de/strings.xml b/openpgp-api/src/main/res/values-de/strings.xml
new file mode 100644
index 0000000..91e800a
--- /dev/null
+++ b/openpgp-api/src/main/res/values-de/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Keine Auswahl</string>
+  <string name="openpgp_install_openkeychain_via">Installiere OpenKeychain mit %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-es/strings.xml b/openpgp-api/src/main/res/values-es/strings.xml
new file mode 100644
index 0000000..da8979b
--- /dev/null
+++ b/openpgp-api/src/main/res/values-es/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Ninguno</string>
+  <string name="openpgp_install_openkeychain_via">Instalar OpenKeychain mediante %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-et/strings.xml b/openpgp-api/src/main/res/values-et/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-et/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-fi/strings.xml b/openpgp-api/src/main/res/values-fi/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-fi/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-fr/strings.xml b/openpgp-api/src/main/res/values-fr/strings.xml
new file mode 100644
index 0000000..9b36df2
--- /dev/null
+++ b/openpgp-api/src/main/res/values-fr/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Aucun</string>
+  <string name="openpgp_install_openkeychain_via">Installer OpenKeychain par %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-is/strings.xml b/openpgp-api/src/main/res/values-is/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-is/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-it/strings.xml b/openpgp-api/src/main/res/values-it/strings.xml
new file mode 100644
index 0000000..23e8e80
--- /dev/null
+++ b/openpgp-api/src/main/res/values-it/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Nessuno</string>
+  <string name="openpgp_install_openkeychain_via">Installa OpenKeychain via %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-ja/strings.xml b/openpgp-api/src/main/res/values-ja/strings.xml
new file mode 100644
index 0000000..5e337f5
--- /dev/null
+++ b/openpgp-api/src/main/res/values-ja/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">無し</string>
+  <string name="openpgp_install_openkeychain_via">%s 経由でOpenKeychainをインストール</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-nl/strings.xml b/openpgp-api/src/main/res/values-nl/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-nl/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-pl/strings.xml b/openpgp-api/src/main/res/values-pl/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-pl/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-pt/strings.xml b/openpgp-api/src/main/res/values-pt/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-pt/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-ru/strings.xml b/openpgp-api/src/main/res/values-ru/strings.xml
new file mode 100644
index 0000000..e8fd1dd
--- /dev/null
+++ b/openpgp-api/src/main/res/values-ru/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Нет</string>
+  <string name="openpgp_install_openkeychain_via">Установить OpenKeychain через %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-sl/strings.xml b/openpgp-api/src/main/res/values-sl/strings.xml
new file mode 100644
index 0000000..20bf70b
--- /dev/null
+++ b/openpgp-api/src/main/res/values-sl/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Brez</string>
+  <string name="openpgp_install_openkeychain_via">Namesti OpenKeychain prek %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-tr/strings.xml b/openpgp-api/src/main/res/values-tr/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-tr/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values-uk/strings.xml b/openpgp-api/src/main/res/values-uk/strings.xml
new file mode 100644
index 0000000..baf600a
--- /dev/null
+++ b/openpgp-api/src/main/res/values-uk/strings.xml
@@ -0,0 +1,5 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources>
+  <string name="openpgp_list_preference_none">Жоден</string>
+  <string name="openpgp_install_openkeychain_via">Встановити OpenKeychain через %s</string>
+</resources>
diff --git a/openpgp-api/src/main/res/values-zh/strings.xml b/openpgp-api/src/main/res/values-zh/strings.xml
new file mode 100644
index 0000000..c757504
--- /dev/null
+++ b/openpgp-api/src/main/res/values-zh/strings.xml
@@ -0,0 +1,2 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<resources/>
diff --git a/openpgp-api/src/main/res/values/strings.xml b/openpgp-api/src/main/res/values/strings.xml
new file mode 100644
index 0000000..a45524f
--- /dev/null
+++ b/openpgp-api/src/main/res/values/strings.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="openpgp_list_preference_none">None</string>
+    <string name="openpgp_install_openkeychain_via">Install OpenKeychain via %s</string>
+    <string name="openpgp_no_key_selected">No key selected</string>
+    <string name="openpgp_key_selected">Key has been selected</string>
+
+</resources>
\ No newline at end of file