/* * Copyright (C) 2012-2014 Dominik Schürmann * Copyright (C) 2014 Vincent Breitmoser * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ package org.sufficientlysecure.keychain.service; import android.app.IntentService; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.operations.CertifyOperation; import org.sufficientlysecure.keychain.operations.DeleteOperation; import org.sufficientlysecure.keychain.operations.EditKeyOperation; import org.sufficientlysecure.keychain.operations.results.DeleteResult; import org.sufficientlysecure.keychain.operations.results.EditKeyResult; import org.sufficientlysecure.keychain.operations.results.ExportResult; import org.sufficientlysecure.keychain.operations.results.PgpEditKeyResult; import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; import org.sufficientlysecure.keychain.operations.results.CertifyResult; import org.sufficientlysecure.keychain.util.FileHelper; import org.sufficientlysecure.keychain.util.ParcelableFileCache.IteratorWithSize; import org.sufficientlysecure.keychain.util.Preferences; import org.sufficientlysecure.keychain.keyimport.HkpKeyserver; import org.sufficientlysecure.keychain.keyimport.Keyserver; import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing; import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKeyRing; import org.sufficientlysecure.keychain.pgp.PgpDecryptVerify; import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult; import org.sufficientlysecure.keychain.pgp.PgpHelper; import org.sufficientlysecure.keychain.operations.ImportExportOperation; import org.sufficientlysecure.keychain.pgp.PgpSignEncrypt; import org.sufficientlysecure.keychain.pgp.Progressable; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException; import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralMsgIdException; import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.operations.results.OperationResult; import org.sufficientlysecure.keychain.operations.results.ConsolidateResult; import org.sufficientlysecure.keychain.operations.results.ImportKeyResult; import org.sufficientlysecure.keychain.operations.results.SignEncryptResult; import org.sufficientlysecure.keychain.util.ParcelableFileCache; import org.sufficientlysecure.keychain.util.InputData; import org.sufficientlysecure.keychain.util.Log; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.Date; import java.util.Iterator; import java.util.concurrent.atomic.AtomicBoolean; /** * This Service contains all important long lasting operations for OpenKeychain. It receives Intents with * data from the activities or other apps, queues these intents, executes them, and stops itself * after doing them. */ public class KeychainIntentService extends IntentService implements Progressable { /* extras that can be given by intent */ public static final String EXTRA_MESSENGER = "messenger"; public static final String EXTRA_DATA = "data"; /* possible actions */ public static final String ACTION_SIGN_ENCRYPT = Constants.INTENT_PREFIX + "SIGN_ENCRYPT"; public static final String ACTION_DECRYPT_VERIFY = Constants.INTENT_PREFIX + "DECRYPT_VERIFY"; public static final String ACTION_DECRYPT_METADATA = Constants.INTENT_PREFIX + "DECRYPT_METADATA"; public static final String ACTION_EDIT_KEYRING = Constants.INTENT_PREFIX + "EDIT_KEYRING"; public static final String ACTION_IMPORT_KEYRING = Constants.INTENT_PREFIX + "IMPORT_KEYRING"; public static final String ACTION_EXPORT_KEYRING = Constants.INTENT_PREFIX + "EXPORT_KEYRING"; public static final String ACTION_UPLOAD_KEYRING = Constants.INTENT_PREFIX + "UPLOAD_KEYRING"; public static final String ACTION_CERTIFY_KEYRING = Constants.INTENT_PREFIX + "SIGN_KEYRING"; public static final String ACTION_DELETE = Constants.INTENT_PREFIX + "DELETE"; public static final String ACTION_CONSOLIDATE = Constants.INTENT_PREFIX + "CONSOLIDATE"; public static final String ACTION_CANCEL = Constants.INTENT_PREFIX + "CANCEL"; /* keys for data bundle */ // encrypt, decrypt, import export public static final String TARGET = "target"; public static final String SOURCE = "source"; // possible targets: public static final int IO_BYTES = 1; public static final int IO_URI = 2; public static final int IO_URIS = 3; public static final String SELECTED_URI = "selected_uri"; // encrypt public static final String ENCRYPT_SIGNATURE_MASTER_ID = "secret_key_id"; public static final String ENCRYPT_SIGNATURE_KEY_PASSPHRASE = "secret_key_passphrase"; public static final String ENCRYPT_SIGNATURE_NFC_TIMESTAMP = "signature_nfc_timestamp"; public static final String ENCRYPT_SIGNATURE_NFC_HASH = "signature_nfc_hash"; public static final String ENCRYPT_USE_ASCII_ARMOR = "use_ascii_armor"; public static final String ENCRYPT_ENCRYPTION_KEYS_IDS = "encryption_keys_ids"; public static final String ENCRYPT_COMPRESSION_ID = "compression_id"; public static final String ENCRYPT_MESSAGE_BYTES = "message_bytes"; public static final String ENCRYPT_DECRYPT_INPUT_URI = "input_uri"; public static final String ENCRYPT_INPUT_URIS = "input_uris"; public static final String ENCRYPT_DECRYPT_OUTPUT_URI = "output_uri"; public static final String ENCRYPT_OUTPUT_URIS = "output_uris"; public static final String ENCRYPT_SYMMETRIC_PASSPHRASE = "passphrase"; // decrypt/verify public static final String DECRYPT_CIPHERTEXT_BYTES = "ciphertext_bytes"; public static final String DECRYPT_PASSPHRASE = "passphrase"; public static final String DECRYPT_NFC_DECRYPTED_SESSION_KEY = "nfc_decrypted_session_key"; // save keyring public static final String EDIT_KEYRING_PARCEL = "save_parcel"; public static final String EDIT_KEYRING_PASSPHRASE = "passphrase"; // delete keyring(s) public static final String DELETE_KEY_LIST = "delete_list"; public static final String DELETE_IS_SECRET = "delete_is_secret"; // import key public static final String IMPORT_KEY_LIST = "import_key_list"; public static final String IMPORT_KEY_SERVER = "import_key_server"; // export key public static final String EXPORT_FILENAME = "export_filename"; public static final String EXPORT_URI = "export_uri"; public static final String EXPORT_SECRET = "export_secret"; public static final String EXPORT_ALL = "export_all"; public static final String EXPORT_KEY_RING_MASTER_KEY_ID = "export_key_ring_id"; // upload key public static final String UPLOAD_KEY_SERVER = "upload_key_server"; // certify key public static final String CERTIFY_PARCEL = "certify_parcel"; // consolidate public static final String CONSOLIDATE_RECOVERY = "consolidate_recovery"; /* * possible data keys as result send over messenger */ // encrypt public static final String RESULT_BYTES = "encrypted_data"; // decrypt/verify public static final String RESULT_DECRYPTED_BYTES = "decrypted_data"; Messenger mMessenger; // this attribute can possibly merged with the one above? not sure... private AtomicBoolean mActionCanceled = new AtomicBoolean(false); public KeychainIntentService() { super("KeychainIntentService"); } /** * The IntentService calls this method from the default worker thread with the intent that * started the service. When this method returns, IntentService stops the service, as * appropriate. */ @Override protected void onHandleIntent(Intent intent) { // We have not been cancelled! (yet) mActionCanceled.set(false); Bundle extras = intent.getExtras(); if (extras == null) { Log.e(Constants.TAG, "Extras bundle is null!"); return; } if (!(extras.containsKey(EXTRA_MESSENGER) || extras.containsKey(EXTRA_DATA) || (intent .getAction() == null))) { Log.e(Constants.TAG, "Extra bundle must contain a messenger, a data bundle, and an action!"); return; } Uri dataUri = intent.getData(); mMessenger = (Messenger) extras.get(EXTRA_MESSENGER); Bundle data = extras.getBundle(EXTRA_DATA); if (data == null) { Log.e(Constants.TAG, "data extra is null!"); return; } Log.logDebugBundle(data, "EXTRA_DATA"); ProviderHelper providerHelper = new ProviderHelper(this); String action = intent.getAction(); // executeServiceMethod action from extra bundle if (ACTION_CERTIFY_KEYRING.equals(action)) { // Input CertifyActionsParcel parcel = data.getParcelable(CERTIFY_PARCEL); String keyServerUri = data.getString(UPLOAD_KEY_SERVER); // Operation CertifyOperation op = new CertifyOperation(this, providerHelper, this, mActionCanceled); CertifyResult result = op.certify(parcel, keyServerUri); // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } else if (ACTION_CONSOLIDATE.equals(action)) { // Operation ConsolidateResult result; if (data.containsKey(CONSOLIDATE_RECOVERY) && data.getBoolean(CONSOLIDATE_RECOVERY)) { result = new ProviderHelper(this).consolidateDatabaseStep2(this); } else { result = new ProviderHelper(this).consolidateDatabaseStep1(this); } // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } else if (ACTION_DECRYPT_METADATA.equals(action)) { try { /* Input */ String passphrase = data.getString(DECRYPT_PASSPHRASE); byte[] nfcDecryptedSessionKey = data.getByteArray(DECRYPT_NFC_DECRYPTED_SESSION_KEY); InputData inputData = createDecryptInputData(data); /* Operation */ Bundle resultData = new Bundle(); // verifyText and decrypt returning additional resultData values for the // verification of signatures PgpDecryptVerify.Builder builder = new PgpDecryptVerify.Builder( this, new ProviderHelper(this), this, inputData, null ); builder.setAllowSymmetricDecryption(true) .setPassphrase(passphrase) .setDecryptMetadataOnly(true) .setNfcState(nfcDecryptedSessionKey); DecryptVerifyResult decryptVerifyResult = builder.build().execute(); sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, decryptVerifyResult); } catch (Exception e) { sendErrorToHandler(e); } } else if (ACTION_DECRYPT_VERIFY.equals(action)) { try { /* Input */ String passphrase = data.getString(DECRYPT_PASSPHRASE); byte[] nfcDecryptedSessionKey = data.getByteArray(DECRYPT_NFC_DECRYPTED_SESSION_KEY); InputData inputData = createDecryptInputData(data); OutputStream outStream = createCryptOutputStream(data); /* Operation */ Bundle resultData = new Bundle(); // verifyText and decrypt returning additional resultData values for the // verification of signatures PgpDecryptVerify.Builder builder = new PgpDecryptVerify.Builder( this, new ProviderHelper(this), this, inputData, outStream ); builder.setAllowSymmetricDecryption(true) .setPassphrase(passphrase) .setNfcState(nfcDecryptedSessionKey); DecryptVerifyResult decryptVerifyResult = builder.build().execute(); outStream.close(); resultData.putParcelable(DecryptVerifyResult.EXTRA_RESULT, decryptVerifyResult); /* Output */ finalizeDecryptOutputStream(data, resultData, outStream); Log.logDebugBundle(resultData, "resultData"); sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, resultData); } catch (Exception e) { sendErrorToHandler(e); } } else if (ACTION_DELETE.equals(action)) { // Input long[] masterKeyIds = data.getLongArray(DELETE_KEY_LIST); boolean isSecret = data.getBoolean(DELETE_IS_SECRET); // Operation DeleteOperation op = new DeleteOperation(this, new ProviderHelper(this), this); DeleteResult result = op.execute(masterKeyIds, isSecret); // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } else if (ACTION_EDIT_KEYRING.equals(action)) { // Input SaveKeyringParcel saveParcel = data.getParcelable(EDIT_KEYRING_PARCEL); String passphrase = data.getString(EDIT_KEYRING_PASSPHRASE); // Operation EditKeyOperation op = new EditKeyOperation(this, providerHelper, this, mActionCanceled); EditKeyResult result = op.execute(saveParcel, passphrase); // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } else if (ACTION_EXPORT_KEYRING.equals(action)) { // Input boolean exportSecret = data.getBoolean(EXPORT_SECRET, false); String outputFile = data.getString(EXPORT_FILENAME); Uri outputUri = data.getParcelable(EXPORT_URI); boolean exportAll = data.getBoolean(EXPORT_ALL); long[] masterKeyIds = exportAll ? null : data.getLongArray(EXPORT_KEY_RING_MASTER_KEY_ID); // Operation ImportExportOperation importExportOperation = new ImportExportOperation(this, new ProviderHelper(this), this); ExportResult result; if (outputFile != null) { result = importExportOperation.exportToFile(masterKeyIds, exportSecret, outputFile); } else { result = importExportOperation.exportToUri(masterKeyIds, exportSecret, outputUri); } // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } else if (ACTION_IMPORT_KEYRING.equals(action)) { try { // Input String keyServer = data.getString(IMPORT_KEY_SERVER); Iterator entries; int numEntries; if (data.containsKey(IMPORT_KEY_LIST)) { // get entries from intent ArrayList list = data.getParcelableArrayList(IMPORT_KEY_LIST); entries = list.iterator(); numEntries = list.size(); } else { // get entries from cached file ParcelableFileCache cache = new ParcelableFileCache(this, "key_import.pcl"); IteratorWithSize it = cache.readCache(); entries = it; numEntries = it.getSize(); } // Operation ImportExportOperation importExportOperation = new ImportExportOperation( this, providerHelper, this, mActionCanceled); ImportKeyResult result = importExportOperation.importKeyRings(entries, numEntries, keyServer); // Special: consolidate on secret key import (cannot be cancelled!) if (result.mSecret > 0) { // TODO move this into the import operation providerHelper.consolidateDatabaseStep1(this); } // Special: make sure new data is synced into contacts ContactSyncAdapterService.requestSync(); // Result sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, result); } catch (Exception e) { sendErrorToHandler(e); } } else if (ACTION_SIGN_ENCRYPT.equals(action)) { try { /* Input */ int source = data.get(SOURCE) != null ? data.getInt(SOURCE) : data.getInt(TARGET); Bundle resultData = new Bundle(); long sigMasterKeyId = data.getLong(ENCRYPT_SIGNATURE_MASTER_ID); String sigKeyPassphrase = data.getString(ENCRYPT_SIGNATURE_KEY_PASSPHRASE); byte[] nfcHash = data.getByteArray(ENCRYPT_SIGNATURE_NFC_HASH); Date nfcTimestamp = (Date) data.getSerializable(ENCRYPT_SIGNATURE_NFC_TIMESTAMP); String symmetricPassphrase = data.getString(ENCRYPT_SYMMETRIC_PASSPHRASE); boolean useAsciiArmor = data.getBoolean(ENCRYPT_USE_ASCII_ARMOR); long encryptionKeyIds[] = data.getLongArray(ENCRYPT_ENCRYPTION_KEYS_IDS); int compressionId = data.getInt(ENCRYPT_COMPRESSION_ID); int urisCount = data.containsKey(ENCRYPT_INPUT_URIS) ? data.getParcelableArrayList(ENCRYPT_INPUT_URIS).size() : 1; for (int i = 0; i < urisCount; i++) { data.putInt(SELECTED_URI, i); InputData inputData = createEncryptInputData(data); OutputStream outStream = createCryptOutputStream(data); String originalFilename = getOriginalFilename(data); /* Operation */ PgpSignEncrypt.Builder builder = new PgpSignEncrypt.Builder( this, new ProviderHelper(this), this, inputData, outStream ); builder.setEnableAsciiArmorOutput(useAsciiArmor) .setVersionHeader(PgpHelper.getVersionForHeader(this)) .setCompressionId(compressionId) .setSymmetricEncryptionAlgorithm( Preferences.getPreferences(this).getDefaultEncryptionAlgorithm()) .setEncryptionMasterKeyIds(encryptionKeyIds) .setSymmetricPassphrase(symmetricPassphrase) .setOriginalFilename(originalFilename); try { // Find the appropriate subkey to sign with CachedPublicKeyRing signingRing = new ProviderHelper(this).getCachedPublicKeyRing(sigMasterKeyId); long sigSubKeyId = signingRing.getSecretSignId(); // Set signature settings builder.setSignatureMasterKeyId(sigMasterKeyId) .setSignatureSubKeyId(sigSubKeyId) .setSignaturePassphrase(sigKeyPassphrase) .setSignatureHashAlgorithm( Preferences.getPreferences(this).getDefaultHashAlgorithm()) .setAdditionalEncryptId(sigMasterKeyId); if (nfcHash != null && nfcTimestamp != null) { builder.setNfcState(nfcHash, nfcTimestamp); } } catch (PgpKeyNotFoundException e) { // encrypt-only // TODO Just silently drop the requested signature? Shouldn't we throw here? } // this assumes that the bytes are cleartext (valid for current implementation!) if (source == IO_BYTES) { builder.setCleartextInput(true); } SignEncryptResult result = builder.build().execute(); resultData.putParcelable(SignEncryptResult.EXTRA_RESULT, result); outStream.close(); /* Output */ finalizeEncryptOutputStream(data, resultData, outStream); } Log.logDebugBundle(resultData, "resultData"); sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, resultData); } catch (Exception e) { sendErrorToHandler(e); } } else if (ACTION_UPLOAD_KEYRING.equals(action)) { try { /* Input */ String keyServer = data.getString(UPLOAD_KEY_SERVER); // and dataUri! /* Operation */ HkpKeyserver server = new HkpKeyserver(keyServer); CanonicalizedPublicKeyRing keyring = providerHelper.getCanonicalizedPublicKeyRing(dataUri); ImportExportOperation importExportOperation = new ImportExportOperation(this, new ProviderHelper(this), this); try { importExportOperation.uploadKeyRingToServer(server, keyring); } catch (Keyserver.AddKeyException e) { throw new PgpGeneralException("Unable to export key to selected server"); } sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY); } catch (Exception e) { sendErrorToHandler(e); } } } private void sendErrorToHandler(Exception e) { // TODO: Implement a better exception handling here // contextualize the exception, if necessary String message; if (e instanceof PgpGeneralMsgIdException) { e = ((PgpGeneralMsgIdException) e).getContextualized(this); message = e.getMessage(); } else { message = e.getMessage(); } Log.d(Constants.TAG, "KeychainIntentService Exception: ", e); Bundle data = new Bundle(); data.putString(KeychainIntentServiceHandler.DATA_ERROR, message); sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_EXCEPTION, null, data); } private void sendMessageToHandler(Integer arg1, Integer arg2, Bundle data) { Message msg = Message.obtain(); assert msg != null; msg.arg1 = arg1; if (arg2 != null) { msg.arg2 = arg2; } if (data != null) { msg.setData(data); } try { mMessenger.send(msg); } catch (RemoteException e) { Log.w(Constants.TAG, "Exception sending message, Is handler present?", e); } catch (NullPointerException e) { Log.w(Constants.TAG, "Messenger is null!", e); } } private void sendMessageToHandler(Integer arg1, OperationResult data) { Bundle bundle = new Bundle(); bundle.putParcelable(OperationResult.EXTRA_RESULT, data); sendMessageToHandler(arg1, null, bundle); } private void sendMessageToHandler(Integer arg1, Bundle data) { sendMessageToHandler(arg1, null, data); } private void sendMessageToHandler(Integer arg1) { sendMessageToHandler(arg1, null, null); } /** * Set progress of ProgressDialog by sending message to handler on UI thread */ public void setProgress(String message, int progress, int max) { Log.d(Constants.TAG, "Send message by setProgress with progress=" + progress + ", max=" + max); Bundle data = new Bundle(); if (message != null) { data.putString(KeychainIntentServiceHandler.DATA_MESSAGE, message); } data.putInt(KeychainIntentServiceHandler.DATA_PROGRESS, progress); data.putInt(KeychainIntentServiceHandler.DATA_PROGRESS_MAX, max); sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_UPDATE_PROGRESS, null, data); } public void setProgress(int resourceId, int progress, int max) { setProgress(getString(resourceId), progress, max); } public void setProgress(int progress, int max) { setProgress(null, progress, max); } @Override public void setPreventCancel() { sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_PREVENT_CANCEL); } private InputData createDecryptInputData(Bundle data) throws IOException, PgpGeneralException { return createCryptInputData(data, DECRYPT_CIPHERTEXT_BYTES); } private InputData createEncryptInputData(Bundle data) throws IOException, PgpGeneralException { return createCryptInputData(data, ENCRYPT_MESSAGE_BYTES); } private InputData createCryptInputData(Bundle data, String bytesName) throws PgpGeneralException, IOException { int source = data.get(SOURCE) != null ? data.getInt(SOURCE) : data.getInt(TARGET); switch (source) { case IO_BYTES: /* encrypting bytes directly */ byte[] bytes = data.getByteArray(bytesName); return new InputData(new ByteArrayInputStream(bytes), bytes.length); case IO_URI: /* encrypting content uri */ Uri providerUri = data.getParcelable(ENCRYPT_DECRYPT_INPUT_URI); // InputStream return new InputData(getContentResolver().openInputStream(providerUri), FileHelper.getFileSize(this, providerUri, 0)); case IO_URIS: providerUri = data.getParcelableArrayList(ENCRYPT_INPUT_URIS).get(data.getInt(SELECTED_URI)); // InputStream return new InputData(getContentResolver().openInputStream(providerUri), FileHelper.getFileSize(this, providerUri, 0)); default: throw new PgpGeneralException("No target choosen!"); } } private String getOriginalFilename(Bundle data) throws PgpGeneralException, FileNotFoundException { int target = data.getInt(TARGET); switch (target) { case IO_BYTES: return ""; case IO_URI: Uri providerUri = data.getParcelable(ENCRYPT_DECRYPT_INPUT_URI); return FileHelper.getFilename(this, providerUri); case IO_URIS: providerUri = data.getParcelableArrayList(ENCRYPT_INPUT_URIS).get(data.getInt(SELECTED_URI)); return FileHelper.getFilename(this, providerUri); default: throw new PgpGeneralException("No target choosen!"); } } private OutputStream createCryptOutputStream(Bundle data) throws PgpGeneralException, FileNotFoundException { int target = data.getInt(TARGET); switch (target) { case IO_BYTES: return new ByteArrayOutputStream(); case IO_URI: Uri providerUri = data.getParcelable(ENCRYPT_DECRYPT_OUTPUT_URI); return getContentResolver().openOutputStream(providerUri); case IO_URIS: providerUri = data.getParcelableArrayList(ENCRYPT_OUTPUT_URIS).get(data.getInt(SELECTED_URI)); return getContentResolver().openOutputStream(providerUri); default: throw new PgpGeneralException("No target choosen!"); } } private void finalizeEncryptOutputStream(Bundle data, Bundle resultData, OutputStream outStream) { finalizeCryptOutputStream(data, resultData, outStream, RESULT_BYTES); } private void finalizeDecryptOutputStream(Bundle data, Bundle resultData, OutputStream outStream) { finalizeCryptOutputStream(data, resultData, outStream, RESULT_DECRYPTED_BYTES); } private void finalizeCryptOutputStream(Bundle data, Bundle resultData, OutputStream outStream, String bytesName) { int target = data.getInt(TARGET); switch (target) { case IO_BYTES: byte output[] = ((ByteArrayOutputStream) outStream).toByteArray(); resultData.putByteArray(bytesName, output); break; case IO_URI: case IO_URIS: // nothing, output was written, just send okay and verification bundle break; } } @Override public int onStartCommand(Intent intent, int flags, int startId) { if (ACTION_CANCEL.equals(intent.getAction())) { mActionCanceled.set(true); return START_NOT_STICKY; } return super.onStartCommand(intent, flags, startId); } }