New Gradle project structure

1 files changed, 1003 insertions, 0 deletions

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
new file mode 100644
index 000000000..9ede8238d
--- /dev/null
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EncryptActivity.java
@@ -0,0 +1,1003 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * 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.ui;
+
+import java.io.File;
+import java.util.Vector;
+
+import org.spongycastle.openpgp.PGPPublicKey;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.Id;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.compatibility.ClipboardReflection;
+import org.sufficientlysecure.keychain.helper.ActionBarHelper;
+import org.sufficientlysecure.keychain.helper.FileHelper;
+import org.sufficientlysecure.keychain.helper.Preferences;
+import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
+import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
+import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.service.KeychainIntentService;
+import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
+import org.sufficientlysecure.keychain.service.PassphraseCacheService;
+import org.sufficientlysecure.keychain.ui.dialog.DeleteFileDialogFragment;
+import org.sufficientlysecure.keychain.ui.dialog.FileDialogFragment;
+import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
+import org.sufficientlysecure.keychain.util.Choice;
+import org.sufficientlysecure.keychain.util.Log;
+
+import android.annotation.SuppressLint;
+import android.app.ProgressDialog;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.animation.AnimationUtils;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.Spinner;
+import android.widget.TextView;
+import android.widget.Toast;
+import android.widget.ViewFlipper;
+
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+import com.beardedhen.androidbootstrap.BootstrapButton;
+
+public class EncryptActivity extends DrawerActivity {
+
+    /* Intents */
+    public static final String ACTION_ENCRYPT = Constants.INTENT_PREFIX + "ENCRYPT";
+
+    /* EXTRA keys for input */
+    public static final String EXTRA_TEXT = "text";
+
+    // enables ASCII Armor for file encryption when uri is given
+    public static final String EXTRA_ASCII_ARMOR = "ascii_armor";
+
+    // preselect ids, for internal use
+    public static final String EXTRA_SIGNATURE_KEY_ID = "signature_key_id";
+    public static final String EXTRA_ENCRYPTION_KEY_IDS = "encryption_key_ids";
+
+    private long mEncryptionKeyIds[] = null;
+
+    private EditText mMessage = null;
+    private BootstrapButton mSelectKeysButton = null;
+
+    private boolean mEncryptEnabled = false;
+    private String mEncryptString = "";
+    private boolean mEncryptToClipboardEnabled = false;
+    private String mEncryptToClipboardString = "";
+
+    private CheckBox mSign = null;
+    private TextView mMainUserId = null;
+    private TextView mMainUserIdRest = null;
+
+    private ViewFlipper mSource = null;
+    private TextView mSourceLabel = null;
+    private ImageView mSourcePrevious = null;
+    private ImageView mSourceNext = null;
+
+    private ViewFlipper mMode = null;
+    private TextView mModeLabel = null;
+    private ImageView mModePrevious = null;
+    private ImageView mModeNext = null;
+
+    private int mEncryptTarget;
+
+    private EditText mPassPhrase = null;
+    private EditText mPassPhraseAgain = null;
+    private CheckBox mAsciiArmor = null;
+    private Spinner mFileCompression = null;
+
+    private EditText mFilename = null;
+    private CheckBox mDeleteAfter = null;
+    private BootstrapButton mBrowse = null;
+
+    private String mInputFilename = null;
+    private String mOutputFilename = null;
+
+    private boolean mAsciiArmorDemand = false;
+    private boolean mOverrideAsciiArmor = false;
+
+    private boolean mGenerateSignature = false;
+
+    private long mSecretKeyId = Id.key.none;
+
+    private FileDialogFragment mFileDialog;
+
+    /**
+     * ActionBar menu is created based on class variables to change it at runtime
+     * 
+     */
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        if (mEncryptToClipboardEnabled) {
+            menu.add(1, Id.menu.option.encrypt_to_clipboard, 0, mEncryptToClipboardString)
+                    .setShowAsAction(
+                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        }
+        if (mEncryptEnabled) {
+            menu.add(1, Id.menu.option.encrypt, 1, mEncryptString).setShowAsAction(
+                    MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case Id.menu.option.encrypt_to_clipboard:
+            encryptToClipboardClicked();
+
+            return true;
+
+        case Id.menu.option.encrypt:
+            encryptClicked();
+
+            return true;
+
+        default:
+            return super.onOptionsItemSelected(item);
+
+        }
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.encrypt_activity);
+
+        // set actionbar without home button if called from another app
+        ActionBarHelper.setBackButton(this);
+
+        initView();
+
+        setupDrawerNavigation(savedInstanceState);
+
+        // Handle intent actions
+        handleActions(getIntent());
+
+        updateView();
+        updateSource();
+        updateMode();
+
+        updateActionBarButtons();
+    }
+
+    /**
+     * Handles all actions with this intent
+     * 
+     * @param intent
+     */
+    private void handleActions(Intent intent) {
+        String action = intent.getAction();
+        Bundle extras = intent.getExtras();
+        String type = intent.getType();
+        Uri uri = intent.getData();
+
+        if (extras == null) {
+            extras = new Bundle();
+        }
+
+        /*
+         * Android's Action
+         */
+        if (Intent.ACTION_SEND.equals(action) && type != null) {
+            // When sending to APG Encrypt via share menu
+            if ("text/plain".equals(type)) {
+                // Plain text
+                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
+                    extras.putString(EXTRA_TEXT, sharedText);
+                    extras.putBoolean(EXTRA_ASCII_ARMOR, true);
+                    action = ACTION_ENCRYPT;
+                }
+            } else {
+                // Files via content provider, override uri and action
+                uri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
+                action = ACTION_ENCRYPT;
+            }
+        }
+
+        if (extras.containsKey(EXTRA_ASCII_ARMOR)) {
+            mAsciiArmorDemand = extras.getBoolean(EXTRA_ASCII_ARMOR, true);
+            mOverrideAsciiArmor = true;
+            mAsciiArmor.setChecked(mAsciiArmorDemand);
+        }
+
+        String textData = extras.getString(EXTRA_TEXT);
+
+        long signatureKeyId = extras.getLong(EXTRA_SIGNATURE_KEY_ID);
+        long[] encryptionKeyIds = extras.getLongArray(EXTRA_ENCRYPTION_KEY_IDS);
+
+        // preselect keys given by intent
+        preselectKeys(signatureKeyId, encryptionKeyIds);
+
+        /**
+         * Main Actions
+         */
+        if (ACTION_ENCRYPT.equals(action) && textData != null) {
+            // encrypt text based on given extra
+
+            mMessage.setText(textData);
+            mSource.setInAnimation(null);
+            mSource.setOutAnimation(null);
+            while (mSource.getCurrentView().getId() != R.id.sourceMessage) {
+                mSource.showNext();
+            }
+        } else if (ACTION_ENCRYPT.equals(action) && uri != null) {
+            // encrypt file based on Uri
+
+            // get file path from uri
+            String path = FileHelper.getPath(this, uri);
+
+            if (path != null) {
+                mInputFilename = path;
+                mFilename.setText(mInputFilename);
+
+                mSource.setInAnimation(null);
+                mSource.setOutAnimation(null);
+                while (mSource.getCurrentView().getId() != R.id.sourceFile) {
+                    mSource.showNext();
+                }
+            } else {
+                Log.e(Constants.TAG,
+                        "Direct binary data without actual file in filesystem is not supported by Intents. Please use the Remote Service API!");
+                Toast.makeText(this, R.string.error_only_files_are_supported, Toast.LENGTH_LONG)
+                        .show();
+                // end activity
+                finish();
+            }
+        } else {
+            Log.e(Constants.TAG,
+                    "Include the extra 'text' or an Uri with setData() in your Intent!");
+        }
+    }
+
+    /**
+     * If an Intent gives a signatureKeyId and/or encryptionKeyIds, preselect those!
+     * 
+     * @param preselectedSignatureKeyId
+     * @param preselectedEncryptionKeyIds
+     */
+    private void preselectKeys(long preselectedSignatureKeyId, long[] preselectedEncryptionKeyIds) {
+        if (preselectedSignatureKeyId != 0) {
+            PGPSecretKeyRing keyRing = ProviderHelper.getPGPSecretKeyRingByMasterKeyId(this,
+                    preselectedSignatureKeyId);
+            PGPSecretKey masterKey = null;
+            if (keyRing != null) {
+                masterKey = PgpKeyHelper.getMasterKey(keyRing);
+                if (masterKey != null) {
+                    Vector<PGPSecretKey> signKeys = PgpKeyHelper.getUsableSigningKeys(keyRing);
+                    if (signKeys.size() > 0) {
+                        mSecretKeyId = masterKey.getKeyID();
+                    }
+                }
+            }
+        }
+
+        if (preselectedEncryptionKeyIds != null) {
+            Vector<Long> goodIds = new Vector<Long>();
+            for (int i = 0; i < preselectedEncryptionKeyIds.length; ++i) {
+                PGPPublicKeyRing keyRing = ProviderHelper.getPGPPublicKeyRingByMasterKeyId(this,
+                        preselectedEncryptionKeyIds[i]);
+                PGPPublicKey masterKey = null;
+                if (keyRing == null) {
+                    continue;
+                }
+                masterKey = PgpKeyHelper.getMasterKey(keyRing);
+                if (masterKey == null) {
+                    continue;
+                }
+                Vector<PGPPublicKey> encryptKeys = PgpKeyHelper.getUsableEncryptKeys(keyRing);
+                if (encryptKeys.size() == 0) {
+                    continue;
+                }
+                goodIds.add(masterKey.getKeyID());
+            }
+            if (goodIds.size() > 0) {
+                mEncryptionKeyIds = new long[goodIds.size()];
+                for (int i = 0; i < goodIds.size(); ++i) {
+                    mEncryptionKeyIds[i] = goodIds.get(i);
+                }
+            }
+        }
+    }
+
+    /**
+     * Guess output filename based on input path
+     * 
+     * @param path
+     * @return Suggestion for output filename
+     */
+    private String guessOutputFilename(String path) {
+        // output in the same directory but with additional ending
+        File file = new File(path);
+        String ending = (mAsciiArmor.isChecked() ? ".asc" : ".gpg");
+        String outputFilename = file.getParent() + File.separator + file.getName() + ending;
+
+        return outputFilename;
+    }
+
+    private void updateSource() {
+        switch (mSource.getCurrentView().getId()) {
+        case R.id.sourceFile: {
+            mSourceLabel.setText(R.string.label_file);
+            break;
+        }
+
+        case R.id.sourceMessage: {
+            mSourceLabel.setText(R.string.label_message);
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+        updateActionBarButtons();
+    }
+
+    /**
+     * Set ActionBar buttons based on parameters
+     * 
+     * @param encryptEnabled
+     * @param encryptStringRes
+     * @param encryptToClipboardEnabled
+     * @param encryptToClipboardStringRes
+     */
+    @SuppressLint("NewApi")
+    private void setActionbarButtons(boolean encryptEnabled, int encryptStringRes,
+            boolean encryptToClipboardEnabled, int encryptToClipboardStringRes) {
+        mEncryptEnabled = encryptEnabled;
+        if (encryptEnabled) {
+            mEncryptString = getString(encryptStringRes);
+        }
+        mEncryptToClipboardEnabled = encryptToClipboardEnabled;
+        if (encryptToClipboardEnabled) {
+            mEncryptToClipboardString = getString(encryptToClipboardStringRes);
+        }
+
+        // build new action bar based on these class variables
+        invalidateOptionsMenu();
+    }
+
+    /**
+     * Update ActionBar buttons based on current selection in view
+     */
+    private void updateActionBarButtons() {
+        switch (mSource.getCurrentView().getId()) {
+        case R.id.sourceFile: {
+            setActionbarButtons(true, R.string.btn_encrypt_file, false, 0);
+
+            break;
+        }
+
+        case R.id.sourceMessage: {
+            mSourceLabel.setText(R.string.label_message);
+
+            if (mMode.getCurrentView().getId() == R.id.modeSymmetric) {
+                setActionbarButtons(true, R.string.btn_encrypt_and_send, true,
+                        R.string.btn_encrypt_to_clipboard);
+            } else {
+                if (mEncryptionKeyIds == null || mEncryptionKeyIds.length == 0) {
+                    if (mSecretKeyId == 0) {
+                        setActionbarButtons(false, 0, false, 0);
+                    } else {
+                        setActionbarButtons(true, R.string.btn_sign_and_send, true,
+                                R.string.btn_sign_to_clipboard);
+                    }
+                } else {
+                    setActionbarButtons(true, R.string.btn_encrypt_and_send, true,
+                            R.string.btn_encrypt_to_clipboard);
+                }
+            }
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+    }
+
+    private void updateMode() {
+        switch (mMode.getCurrentView().getId()) {
+        case R.id.modeAsymmetric: {
+            mModeLabel.setText(R.string.label_asymmetric);
+            break;
+        }
+
+        case R.id.modeSymmetric: {
+            mModeLabel.setText(R.string.label_symmetric);
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+        updateActionBarButtons();
+    }
+
+    private void encryptToClipboardClicked() {
+        mEncryptTarget = Id.target.clipboard;
+        initiateEncryption();
+    }
+
+    private void encryptClicked() {
+        Log.d(Constants.TAG, "encryptClicked invoked!");
+
+        if (mSource.getCurrentView().getId() == R.id.sourceFile) {
+            mEncryptTarget = Id.target.file;
+        } else {
+            mEncryptTarget = Id.target.email;
+        }
+        initiateEncryption();
+    }
+
+    private void initiateEncryption() {
+        if (mEncryptTarget == Id.target.file) {
+            String currentFilename = mFilename.getText().toString();
+            if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
+                mInputFilename = mFilename.getText().toString();
+            }
+
+            mOutputFilename = guessOutputFilename(mInputFilename);
+
+            if (mInputFilename.equals("")) {
+                Toast.makeText(this, R.string.no_file_selected, Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            if (!mInputFilename.startsWith("content")) {
+                File file = new File(mInputFilename);
+                if (!file.exists() || !file.isFile()) {
+                    Toast.makeText(
+                            this,
+                            getString(R.string.error_message,
+                                    getString(R.string.error_file_not_found)), Toast.LENGTH_SHORT)
+                            .show();
+                    return;
+                }
+            }
+        }
+
+        // symmetric encryption
+        if (mMode.getCurrentView().getId() == R.id.modeSymmetric) {
+            boolean gotPassPhrase = false;
+            String passPhrase = mPassPhrase.getText().toString();
+            String passPhraseAgain = mPassPhraseAgain.getText().toString();
+            if (!passPhrase.equals(passPhraseAgain)) {
+                Toast.makeText(this, R.string.passphrases_do_not_match, Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            gotPassPhrase = (passPhrase.length() != 0);
+            if (!gotPassPhrase) {
+                Toast.makeText(this, R.string.passphrase_must_not_be_empty, Toast.LENGTH_SHORT)
+                        .show();
+                return;
+            }
+        } else {
+            boolean encryptIt = (mEncryptionKeyIds != null && mEncryptionKeyIds.length > 0);
+            // for now require at least one form of encryption for files
+            if (!encryptIt && mEncryptTarget == Id.target.file) {
+                Toast.makeText(this, R.string.select_encryption_key, Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            if (!encryptIt && mSecretKeyId == 0) {
+                Toast.makeText(this, R.string.select_encryption_or_signature_key,
+                        Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            if (mSecretKeyId != 0
+                    && PassphraseCacheService.getCachedPassphrase(this, mSecretKeyId) == null) {
+                showPassphraseDialog();
+
+                return;
+            }
+        }
+
+        if (mEncryptTarget == Id.target.file) {
+            showOutputFileDialog();
+        } else {
+            encryptStart();
+        }
+    }
+
+    /**
+     * Shows passphrase dialog to cache a new passphrase the user enters for using it later for
+     * encryption
+     */
+    private void showPassphraseDialog() {
+        // Message is received after passphrase is cached
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
+                    if (mEncryptTarget == Id.target.file) {
+                        showOutputFileDialog();
+                    } else {
+                        encryptStart();
+                    }
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+
+        try {
+            PassphraseDialogFragment passphraseDialog = PassphraseDialogFragment.newInstance(
+                    EncryptActivity.this, messenger, mSecretKeyId);
+
+            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);
+        }
+    }
+
+    private void showOutputFileDialog() {
+        // Message is received after file is selected
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == FileDialogFragment.MESSAGE_OKAY) {
+                    Bundle data = message.getData();
+                    mOutputFilename = data.getString(FileDialogFragment.MESSAGE_DATA_FILENAME);
+                    encryptStart();
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+
+        mFileDialog = FileDialogFragment.newInstance(messenger,
+                getString(R.string.title_encrypt_to_file),
+                getString(R.string.specify_file_to_encrypt_to), mOutputFilename, null);
+
+        mFileDialog.show(getSupportFragmentManager(), "fileDialog");
+    }
+
+    private void encryptStart() {
+        // Send all information needed to service to edit key in other thread
+        Intent intent = new Intent(this, KeychainIntentService.class);
+
+        // fill values for this action
+        Bundle data = new Bundle();
+
+        boolean useAsciiArmor = true;
+        long encryptionKeyIds[] = null;
+        int compressionId = 0;
+        boolean signOnly = false;
+        long mSecretKeyIdToPass = 0;
+
+        if (mMode.getCurrentView().getId() == R.id.modeSymmetric) {
+            Log.d(Constants.TAG, "Symmetric encryption enabled!");
+            String passPhrase = mPassPhrase.getText().toString();
+            if (passPhrase.length() == 0) {
+                passPhrase = null;
+            }
+            data.putString(KeychainIntentService.GENERATE_KEY_SYMMETRIC_PASSPHRASE, passPhrase);
+        } else {
+            mSecretKeyIdToPass = mSecretKeyId;
+            encryptionKeyIds = mEncryptionKeyIds;
+            signOnly = (mEncryptionKeyIds == null || mEncryptionKeyIds.length == 0);
+        }
+
+        intent.setAction(KeychainIntentService.ACTION_ENCRYPT_SIGN);
+
+        // choose default settings, target and data bundle by target
+        if (mEncryptTarget == Id.target.file) {
+            useAsciiArmor = mAsciiArmor.isChecked();
+            compressionId = ((Choice) mFileCompression.getSelectedItem()).getId();
+
+            data.putInt(KeychainIntentService.TARGET, KeychainIntentService.TARGET_FILE);
+
+            Log.d(Constants.TAG, "mInputFilename=" + mInputFilename + ", mOutputFilename="
+                    + mOutputFilename);
+
+            data.putString(KeychainIntentService.ENCRYPT_INPUT_FILE, mInputFilename);
+            data.putString(KeychainIntentService.ENCRYPT_OUTPUT_FILE, mOutputFilename);
+
+        } else {
+            useAsciiArmor = true;
+            compressionId = Preferences.getPreferences(this).getDefaultMessageCompression();
+
+            data.putInt(KeychainIntentService.TARGET, KeychainIntentService.TARGET_BYTES);
+
+            String message = mMessage.getText().toString();
+            if (signOnly) {
+                fixBadCharactersForGmail(message);
+            }
+            data.putByteArray(KeychainIntentService.ENCRYPT_MESSAGE_BYTES, message.getBytes());
+        }
+
+        if (mOverrideAsciiArmor) {
+            useAsciiArmor = mAsciiArmorDemand;
+        }
+
+        data.putLong(KeychainIntentService.ENCRYPT_SECRET_KEY_ID, mSecretKeyIdToPass);
+        data.putBoolean(KeychainIntentService.ENCRYPT_USE_ASCII_ARMOR, useAsciiArmor);
+        data.putLongArray(KeychainIntentService.ENCRYPT_ENCRYPTION_KEYS_IDS, encryptionKeyIds);
+        data.putInt(KeychainIntentService.ENCRYPT_COMPRESSION_ID, compressionId);
+        data.putBoolean(KeychainIntentService.ENCRYPT_GENERATE_SIGNATURE, mGenerateSignature);
+        data.putBoolean(KeychainIntentService.ENCRYPT_SIGN_ONLY, signOnly);
+
+        intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
+
+        // Message is received after encrypting is done in ApgService
+        KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(this,
+                R.string.progress_encrypting, ProgressDialog.STYLE_HORIZONTAL) {
+            public void handleMessage(Message message) {
+                // handle messages by standard ApgHandler first
+                super.handleMessage(message);
+
+                if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) {
+                    // get returned data bundle
+                    Bundle data = message.getData();
+
+                    String output;
+                    switch (mEncryptTarget) {
+                    case Id.target.clipboard:
+                        output = data.getString(KeychainIntentService.RESULT_ENCRYPTED_STRING);
+                        Log.d(Constants.TAG, "output: " + output);
+                        ClipboardReflection.copyToClipboard(EncryptActivity.this, output);
+                        Toast.makeText(EncryptActivity.this,
+                                R.string.encryption_to_clipboard_successful, Toast.LENGTH_SHORT)
+                                .show();
+                        break;
+
+                    case Id.target.email:
+
+                        output = data.getString(KeychainIntentService.RESULT_ENCRYPTED_STRING);
+                        Log.d(Constants.TAG, "output: " + output);
+
+                        Intent sendIntent = new Intent(Intent.ACTION_SEND);
+
+                        // Type is set to text/plain so that encrypted messages can
+                        // be sent with Whatsapp, Hangouts, SMS etc...
+                        sendIntent.setType("text/plain");
+
+                        sendIntent.putExtra(Intent.EXTRA_TEXT, output);
+                        startActivity(Intent.createChooser(sendIntent,
+                                getString(R.string.title_send_email)));
+                        break;
+
+                    case Id.target.file:
+                        Toast.makeText(EncryptActivity.this, R.string.encryption_successful,
+                                Toast.LENGTH_SHORT).show();
+
+                        if (mDeleteAfter.isChecked()) {
+                            // Create and show dialog to delete original file
+                            DeleteFileDialogFragment deleteFileDialog = DeleteFileDialogFragment
+                                    .newInstance(mInputFilename);
+                            deleteFileDialog.show(getSupportFragmentManager(), "deleteDialog");
+                        }
+                        break;
+
+                    default:
+                        // shouldn't happen
+                        break;
+
+                    }
+                }
+            };
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(saveHandler);
+        intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
+
+        // show progress dialog
+        saveHandler.showProgressDialog(this);
+
+        // start service with intent
+        startService(intent);
+    }
+
+    /**
+     * Fixes bad message characters for gmail
+     * 
+     * @param message
+     * @return
+     */
+    private String fixBadCharactersForGmail(String message) {
+        // fix the message a bit, trailing spaces and newlines break stuff,
+        // because GMail sends as HTML and such things fuck up the
+        // signature,
+        // TODO: things like "<" and ">" also fuck up the signature
+        message = message.replaceAll(" +\n", "\n");
+        message = message.replaceAll("\n\n+", "\n\n");
+        message = message.replaceFirst("^\n+", "");
+        // make sure there'll be exactly one newline at the end
+        message = message.replaceFirst("\n*$", "\n");
+
+        return message;
+    }
+
+    private void initView() {
+        mSource = (ViewFlipper) findViewById(R.id.source);
+        mSourceLabel = (TextView) findViewById(R.id.sourceLabel);
+        mSourcePrevious = (ImageView) findViewById(R.id.sourcePrevious);
+        mSourceNext = (ImageView) findViewById(R.id.sourceNext);
+
+        mSourcePrevious.setClickable(true);
+        mSourcePrevious.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mSource.setInAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_right_in));
+                mSource.setOutAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_right_out));
+                mSource.showPrevious();
+                updateSource();
+            }
+        });
+
+        mSourceNext.setClickable(true);
+        OnClickListener nextSourceClickListener = new OnClickListener() {
+            public void onClick(View v) {
+                mSource.setInAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_left_in));
+                mSource.setOutAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_left_out));
+                mSource.showNext();
+                updateSource();
+            }
+        };
+        mSourceNext.setOnClickListener(nextSourceClickListener);
+
+        mSourceLabel.setClickable(true);
+        mSourceLabel.setOnClickListener(nextSourceClickListener);
+
+        mMode = (ViewFlipper) findViewById(R.id.mode);
+        mModeLabel = (TextView) findViewById(R.id.modeLabel);
+        mModePrevious = (ImageView) findViewById(R.id.modePrevious);
+        mModeNext = (ImageView) findViewById(R.id.modeNext);
+
+        mModePrevious.setClickable(true);
+        mModePrevious.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mMode.setInAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_right_in));
+                mMode.setOutAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_right_out));
+                mMode.showPrevious();
+                updateMode();
+            }
+        });
+
+        OnClickListener nextModeClickListener = new OnClickListener() {
+            public void onClick(View v) {
+                mMode.setInAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_left_in));
+                mMode.setOutAnimation(AnimationUtils.loadAnimation(EncryptActivity.this,
+                        R.anim.push_left_out));
+                mMode.showNext();
+                updateMode();
+            }
+        };
+        mModeNext.setOnClickListener(nextModeClickListener);
+
+        mModeLabel.setClickable(true);
+        mModeLabel.setOnClickListener(nextModeClickListener);
+
+        mMessage = (EditText) findViewById(R.id.message);
+        mSelectKeysButton = (BootstrapButton) findViewById(R.id.btn_selectEncryptKeys);
+        mSign = (CheckBox) findViewById(R.id.sign);
+        mMainUserId = (TextView) findViewById(R.id.mainUserId);
+        mMainUserIdRest = (TextView) findViewById(R.id.mainUserIdRest);
+
+        mPassPhrase = (EditText) findViewById(R.id.passPhrase);
+        mPassPhraseAgain = (EditText) findViewById(R.id.passPhraseAgain);
+
+        // measure the height of the source_file view and set the message view's min height to that,
+        // so it fills mSource fully... bit of a hack.
+        View tmp = findViewById(R.id.sourceFile);
+        tmp.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
+        int height = tmp.getMeasuredHeight();
+        mMessage.setMinimumHeight(height);
+
+        mFilename = (EditText) findViewById(R.id.filename);
+        mBrowse = (BootstrapButton) findViewById(R.id.btn_browse);
+        mBrowse.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                FileHelper.openFile(EncryptActivity.this, mFilename.getText().toString(), "*/*",
+                        Id.request.filename);
+            }
+        });
+
+        mFileCompression = (Spinner) findViewById(R.id.fileCompression);
+        Choice[] choices = new Choice[] {
+                new Choice(Id.choice.compression.none, getString(R.string.choice_none) + " ("
+                        + getString(R.string.compression_fast) + ")"),
+                new Choice(Id.choice.compression.zip, "ZIP ("
+                        + getString(R.string.compression_fast) + ")"),
+                new Choice(Id.choice.compression.zlib, "ZLIB ("
+                        + getString(R.string.compression_fast) + ")"),
+                new Choice(Id.choice.compression.bzip2, "BZIP2 ("
+                        + getString(R.string.compression_very_slow) + ")"), };
+        ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(this,
+                android.R.layout.simple_spinner_item, choices);
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mFileCompression.setAdapter(adapter);
+
+        int defaultFileCompression = Preferences.getPreferences(this).getDefaultFileCompression();
+        for (int i = 0; i < choices.length; ++i) {
+            if (choices[i].getId() == defaultFileCompression) {
+                mFileCompression.setSelection(i);
+                break;
+            }
+        }
+
+        mDeleteAfter = (CheckBox) findViewById(R.id.deleteAfterEncryption);
+
+        mAsciiArmor = (CheckBox) findViewById(R.id.asciiArmour);
+        mAsciiArmor.setChecked(Preferences.getPreferences(this).getDefaultAsciiArmour());
+
+        mSelectKeysButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                selectPublicKeys();
+            }
+        });
+
+        mSign.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                CheckBox checkBox = (CheckBox) v;
+                if (checkBox.isChecked()) {
+                    selectSecretKey();
+                } else {
+                    mSecretKeyId = Id.key.none;
+                    updateView();
+                }
+            }
+        });
+    }
+
+    private void updateView() {
+        if (mEncryptionKeyIds == null || mEncryptionKeyIds.length == 0) {
+            mSelectKeysButton.setText(getString(R.string.select_keys_button_default));
+        } else {
+            mSelectKeysButton.setText(getResources().getQuantityString(
+                    R.plurals.select_keys_button, mEncryptionKeyIds.length,
+                    mEncryptionKeyIds.length));
+        }
+
+        if (mSecretKeyId == Id.key.none) {
+            mSign.setChecked(false);
+            mMainUserId.setText("");
+            mMainUserIdRest.setText("");
+        } else {
+            String uid = getResources().getString(R.string.unknown_user_id);
+            String uidExtra = "";
+            PGPSecretKeyRing keyRing = ProviderHelper.getPGPSecretKeyRingByMasterKeyId(this,
+                    mSecretKeyId);
+            if (keyRing != null) {
+                PGPSecretKey key = PgpKeyHelper.getMasterKey(keyRing);
+                if (key != null) {
+                    String userId = PgpKeyHelper.getMainUserIdSafe(this, key);
+                    String chunks[] = userId.split(" <", 2);
+                    uid = chunks[0];
+                    if (chunks.length > 1) {
+                        uidExtra = "<" + chunks[1];
+                    }
+                }
+            }
+            mMainUserId.setText(uid);
+            mMainUserIdRest.setText(uidExtra);
+            mSign.setChecked(true);
+        }
+
+        updateActionBarButtons();
+    }
+
+    private void selectPublicKeys() {
+        Intent intent = new Intent(this, SelectPublicKeyActivity.class);
+        Vector<Long> keyIds = new Vector<Long>();
+        if (mSecretKeyId != 0) {
+            keyIds.add(mSecretKeyId);
+        }
+        if (mEncryptionKeyIds != null && mEncryptionKeyIds.length > 0) {
+            for (int i = 0; i < mEncryptionKeyIds.length; ++i) {
+                keyIds.add(mEncryptionKeyIds[i]);
+            }
+        }
+        long[] initialKeyIds = null;
+        if (keyIds.size() > 0) {
+            initialKeyIds = new long[keyIds.size()];
+            for (int i = 0; i < keyIds.size(); ++i) {
+                initialKeyIds[i] = keyIds.get(i);
+            }
+        }
+        intent.putExtra(SelectPublicKeyActivity.EXTRA_SELECTED_MASTER_KEY_IDS, initialKeyIds);
+        startActivityForResult(intent, Id.request.public_keys);
+    }
+
+    private void selectSecretKey() {
+        Intent intent = new Intent(this, SelectSecretKeyActivity.class);
+        startActivityForResult(intent, Id.request.secret_keys);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.filename: {
+            if (resultCode == RESULT_OK && data != null) {
+                try {
+                    String path = FileHelper.getPath(this, data.getData());
+                    Log.d(Constants.TAG, "path=" + path);
+
+                    mFilename.setText(path);
+                } catch (NullPointerException e) {
+                    Log.e(Constants.TAG, "Nullpointer while retrieving path!");
+                }
+            }
+            return;
+        }
+
+        case Id.request.public_keys: {
+            if (resultCode == RESULT_OK) {
+                Bundle bundle = data.getExtras();
+                mEncryptionKeyIds = bundle
+                        .getLongArray(SelectPublicKeyActivity.RESULT_EXTRA_MASTER_KEY_IDS);
+            }
+            updateView();
+            break;
+        }
+
+        case Id.request.secret_keys: {
+            if (resultCode == RESULT_OK) {
+                Bundle bundle = data.getExtras();
+                mSecretKeyId = bundle.getLong(SelectSecretKeyActivity.RESULT_EXTRA_MASTER_KEY_ID);
+            } else {
+                mSecretKeyId = Id.key.none;
+            }
+            updateView();
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+}