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|
/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
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 com.textuality.keybase.lib.Proof;
import com.textuality.keybase.lib.prover.Prover;
import org.json.JSONObject;
import org.spongycastle.openpgp.PGPUtil;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.keyimport.HkpKeyserver;
import org.sufficientlysecure.keychain.keyimport.Keyserver;
import org.sufficientlysecure.keychain.keyimport.ParcelableKeyRing;
import org.sufficientlysecure.keychain.operations.CertifyOperation;
import org.sufficientlysecure.keychain.operations.DeleteOperation;
import org.sufficientlysecure.keychain.operations.ImportExportOperation;
import org.sufficientlysecure.keychain.operations.results.CertifyResult;
import org.sufficientlysecure.keychain.operations.results.ConsolidateResult;
import org.sufficientlysecure.keychain.operations.results.DecryptVerifyResult;
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.ImportKeyResult;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.operations.results.OperationResult.LogType;
import org.sufficientlysecure.keychain.operations.results.OperationResult.OperationLog;
import org.sufficientlysecure.keychain.operations.results.SaveKeyringResult;
import org.sufficientlysecure.keychain.operations.results.SignEncryptResult;
import org.sufficientlysecure.keychain.pgp.CanonicalizedPublicKeyRing;
import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKeyRing;
import org.sufficientlysecure.keychain.pgp.PgpDecryptVerify;
import org.sufficientlysecure.keychain.pgp.PgpHelper;
import org.sufficientlysecure.keychain.pgp.PgpKeyOperation;
import org.sufficientlysecure.keychain.pgp.PgpSignEncrypt;
import org.sufficientlysecure.keychain.pgp.Progressable;
import org.sufficientlysecure.keychain.pgp.UncachedKeyRing;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralMsgIdException;
import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.util.FileHelper;
import org.sufficientlysecure.keychain.util.InputData;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.ParcelableFileCache;
import org.sufficientlysecure.keychain.util.ParcelableFileCache.IteratorWithSize;
import org.sufficientlysecure.keychain.util.Preferences;
import org.sufficientlysecure.keychain.util.ProgressScaler;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import de.measite.minidns.Client;
import de.measite.minidns.DNSMessage;
import de.measite.minidns.Question;
import de.measite.minidns.Record;
import de.measite.minidns.record.Data;
import de.measite.minidns.record.TXT;
/**
* This Service contains all important long lasting operations for APG. 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_VERIFY_KEYBASE_PROOF = Constants.INTENT_PREFIX + "VERIFY_KEYBASE_PROOF";
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";
// keybase proof
public static final String KEYBASE_REQUIRED_FINGERPRINT = "keybase_required_fingerprint";
public static final String KEYBASE_PROOF = "keybase_proof";
// 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_OUTPUT_STREAM = "export_output_stream";
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";
public static final String RESULT_DECRYPT_VERIFY_RESULT = "signature";
// export
public static final String RESULT_EXPORT = "exported";
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_VERIFY_KEYBASE_PROOF.equals(action)) {
try {
Proof proof = new Proof(new JSONObject(data.getString(KEYBASE_PROOF)));
setProgress(R.string.keybase_message_fetching_data, 0, 100);
Prover prover = Prover.findProverFor(proof);
if (prover == null) {
sendProofError(getString(R.string.keybase_no_prover_found) + ": " + proof.getPrettyName());
return;
}
if (!prover.fetchProofData()) {
sendProofError(prover.getLog(), getString(R.string.keybase_problem_fetching_evidence));
return;
}
String domain = prover.dnsTxtCheckRequired();
if (domain != null) {
DNSMessage dnsQuery = new Client().query(new Question(domain, Record.TYPE.TXT));
if (dnsQuery == null) {
sendProofError(prover.getLog(), getString(R.string.keybase_dns_query_failure));
return;
}
Record[] records = dnsQuery.getAnswers();
List<List<byte[]>> extents = new ArrayList<List<byte[]>>();
for (Record r : records) {
Data d = r.getPayload();
if (d instanceof TXT) {
extents.add(((TXT) d).getExtents());
}
}
if (!prover.checkDnsTxt(extents)) {
sendProofError(prover.getLog(), null);
return;
}
}
byte[] messageBytes = prover.getPgpMessage().getBytes();
if (prover.rawMessageCheckRequired()) {
InputStream messageByteStream = PGPUtil.getDecoderStream(new ByteArrayInputStream(messageBytes));
if (!prover.checkRawMessageBytes(messageByteStream)) {
sendProofError(prover.getLog(), null);
return;
}
}
// kind of awkward, but this whole class wants to pull bytes out of “data”
data.putInt(KeychainIntentService.TARGET, KeychainIntentService.IO_BYTES);
data.putByteArray(KeychainIntentService.DECRYPT_CIPHERTEXT_BYTES, messageBytes);
InputData inputData = createDecryptInputData(data);
OutputStream outStream = createCryptOutputStream(data);
String fingerprint = data.getString(KEYBASE_REQUIRED_FINGERPRINT);
PgpDecryptVerify.Builder builder = new PgpDecryptVerify.Builder(
this, new ProviderHelper(this), this,
inputData, outStream
);
builder.setSignedLiteralData(true).setRequiredSignerFingerprint(fingerprint);
DecryptVerifyResult decryptVerifyResult = builder.build().execute();
outStream.close();
if (!decryptVerifyResult.success()) {
OperationLog log = decryptVerifyResult.getLog();
OperationResult.LogEntryParcel lastEntry = null;
for (OperationResult.LogEntryParcel entry : log) {
lastEntry = entry;
}
sendProofError(getString(lastEntry.mType.getMsgId()));
return;
}
if (!prover.validate(outStream.toString())) {
sendProofError(getString(R.string.keybase_message_payload_mismatch));
return;
}
Bundle resultData = new Bundle();
resultData.putString(KeychainIntentServiceHandler.DATA_MESSAGE, "OK");
// these help the handler construct a useful human-readable message
resultData.putString(KeychainIntentServiceHandler.KEYBASE_PROOF_URL, prover.getProofUrl());
resultData.putString(KeychainIntentServiceHandler.KEYBASE_PRESENCE_URL, prover.getPresenceUrl());
resultData.putString(KeychainIntentServiceHandler.KEYBASE_PRESENCE_LABEL, prover.getPresenceLabel());
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, resultData);
} 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)) {
try {
/* Input */
SaveKeyringParcel saveParcel = data.getParcelable(EDIT_KEYRING_PARCEL);
if (saveParcel == null) {
Log.e(Constants.TAG, "bug: missing save_keyring_parcel in data!");
return;
}
/* Operation */
PgpKeyOperation keyOperations =
new PgpKeyOperation(new ProgressScaler(this, 10, 60, 100), mActionCanceled);
EditKeyResult modifyResult;
if (saveParcel.mMasterKeyId != null) {
String passphrase = data.getString(EDIT_KEYRING_PASSPHRASE);
CanonicalizedSecretKeyRing secRing =
new ProviderHelper(this).getCanonicalizedSecretKeyRing(saveParcel.mMasterKeyId);
modifyResult = keyOperations.modifySecretKeyRing(secRing, saveParcel, passphrase);
} else {
modifyResult = keyOperations.createSecretKeyRing(saveParcel);
}
// If the edit operation didn't succeed, exit here
if (!modifyResult.success()) {
// always return SaveKeyringResult, so create one out of the EditKeyResult
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, modifyResult);
return;
}
UncachedKeyRing ring = modifyResult.getRing();
// Check if the action was cancelled
if (mActionCanceled.get()) {
OperationLog log = modifyResult.getLog();
// If it wasn't added before, add log entry
if (!modifyResult.cancelled()) {
log.add(LogType.MSG_OPERATION_CANCELLED, 0);
}
// If so, just stop without saving
modifyResult = new EditKeyResult(
EditKeyResult.RESULT_CANCELLED, log, null);
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, modifyResult);
return;
}
// Save the keyring. The ProviderHelper is initialized with the previous log
SaveKeyringResult saveResult = new ProviderHelper(this, modifyResult.getLog())
.saveSecretKeyRing(ring, new ProgressScaler(this, 60, 95, 100));
// If the edit operation didn't succeed, exit here
if (!saveResult.success()) {
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, saveResult);
return;
}
// cache new passphrase
if (saveParcel.mNewPassphrase != null) {
PassphraseCacheService.addCachedPassphrase(this, ring.getMasterKeyId(), ring.getMasterKeyId(),
saveParcel.mNewPassphrase, ring.getPublicKey().getPrimaryUserIdWithFallback());
}
setProgress(R.string.progress_done, 100, 100);
// make sure new data is synced into contacts
ContactSyncAdapterService.requestSync();
/* Output */
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, saveResult);
} catch (Exception e) {
sendErrorToHandler(e);
}
} 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<ParcelableKeyRing> entries;
int numEntries;
if (data.containsKey(IMPORT_KEY_LIST)) {
// get entries from intent
ArrayList<ParcelableKeyRing> list = data.getParcelableArrayList(IMPORT_KEY_LIST);
entries = list.iterator();
numEntries = list.size();
} else {
// get entries from cached file
ParcelableFileCache<ParcelableKeyRing> cache =
new ParcelableFileCache<ParcelableKeyRing>(this, "key_import.pcl");
IteratorWithSize<ParcelableKeyRing> 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 sendProofError(List<String> log, String label) {
String msg = null;
label = (label == null) ? "" : label + ": ";
for (String m : log) {
Log.e(Constants.TAG, label + m);
msg = m;
}
sendProofError(label + msg);
}
private void sendProofError(String msg) {
Bundle bundle = new Bundle();
bundle.putString(KeychainIntentServiceHandler.DATA_ERROR, msg);
sendMessageToHandler(KeychainIntentServiceHandler.MESSAGE_OKAY, bundle);
}
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.<Uri>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!");
}
}
@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);
}
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.<Uri>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.<Uri>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;
}
}
}
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