open-keychain/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/remote_api/CryptoService.java

556 lines
20 KiB
Java
Raw Normal View History

2013-05-28 09:10:36 -04:00
/*
* Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
2013-05-28 09:10:36 -04:00
*
* 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.
2013-05-28 09:10:36 -04:00
*
* 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.
2013-05-28 09:10:36 -04:00
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
2013-05-28 09:10:36 -04:00
*/
2013-07-01 17:23:53 -04:00
package org.sufficientlysecure.keychain.remote_api;
2013-05-28 09:10:36 -04:00
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;
2013-05-29 09:58:50 -04:00
import org.openintents.crypto.CryptoError;
import org.openintents.crypto.CryptoSignatureResult;
2013-09-08 10:08:36 -04:00
import org.openintents.crypto.ICryptoCallback;
import org.openintents.crypto.ICryptoService;
2013-05-28 09:10:36 -04:00
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.Id;
import org.sufficientlysecure.keychain.R;
2013-09-08 10:08:36 -04:00
import org.sufficientlysecure.keychain.helper.PgpMain;
2013-09-08 12:21:04 -04:00
import org.sufficientlysecure.keychain.helper.Preferences;
2013-09-06 07:48:27 -04:00
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
2013-05-28 09:10:36 -04:00
import org.sufficientlysecure.keychain.service.KeychainIntentService;
import org.sufficientlysecure.keychain.service.PassphraseCacheService;
2013-09-08 10:08:36 -04:00
import org.sufficientlysecure.keychain.util.InputData;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.PausableThreadPoolExecutor;
2013-05-28 09:10:36 -04:00
import android.app.Service;
import android.content.Context;
import android.content.Intent;
2013-09-06 12:36:16 -04:00
import android.database.Cursor;
2013-09-06 07:48:27 -04:00
import android.net.Uri;
import android.os.Binder;
2013-05-28 09:10:36 -04:00
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
public class CryptoService extends Service {
Context mContext;
// just one pool of 4 threads, pause on every user action needed
final ArrayBlockingQueue<Runnable> mPoolQueue = new ArrayBlockingQueue<Runnable>(20);
2013-09-08 13:24:47 -04:00
// TODO: Are these parameters okay?
PausableThreadPoolExecutor mThreadPool = new PausableThreadPoolExecutor(2, 4, 10,
TimeUnit.SECONDS, mPoolQueue);
2013-09-08 13:24:47 -04:00
final Object userInputLock = new Object();
2013-06-17 10:05:39 -04:00
public static final String ACTION_SERVICE_ACTIVITY = "org.sufficientlysecure.keychain.crypto_provider.IServiceActivityCallback";
2013-05-28 09:10:36 -04:00
@Override
public void onCreate() {
super.onCreate();
mContext = this;
Log.d(Constants.TAG, "CryptoService, onCreate()");
2013-05-28 09:10:36 -04:00
}
@Override
public void onDestroy() {
super.onDestroy();
Log.d(Constants.TAG, "CryptoService, onDestroy()");
2013-05-28 09:10:36 -04:00
}
@Override
public IBinder onBind(Intent intent) {
// return different binder for connections from internal service activity
if (ACTION_SERVICE_ACTIVITY.equals(intent.getAction())) {
// this binder can only be used from OpenPGP Keychain
2013-09-06 05:55:08 -04:00
if (isCallerAllowed(true)) {
return mBinderServiceActivity;
} else {
Log.e(Constants.TAG, "This binder can only be used from " + Constants.PACKAGE_NAME);
return null;
}
} else {
return mBinder;
}
2013-05-28 09:10:36 -04:00
}
2013-09-06 07:48:27 -04:00
private String getCachedPassphrase(long keyId) {
String passphrase = PassphraseCacheService.getCachedPassphrase(mContext, keyId);
if (passphrase == null) {
Log.d(Constants.TAG, "No passphrase! Activity required!");
// start passphrase dialog
Bundle extras = new Bundle();
extras.putLong(CryptoServiceActivity.EXTRA_SECRET_KEY_ID, keyId);
pauseQueueAndStartServiceActivity(CryptoServiceActivity.ACTION_CACHE_PASSPHRASE, extras);
2013-09-08 12:21:04 -04:00
// get again after it was entered
passphrase = PassphraseCacheService.getCachedPassphrase(mContext, keyId);
2013-09-06 07:48:27 -04:00
}
return passphrase;
}
2013-09-06 12:54:55 -04:00
/**
* Search database for key ids based on emails.
*
* @param encryptionUserIds
* @return
*/
private long[] getKeyIdsFromEmails(String[] encryptionUserIds, long ownKeyId) {
2013-09-06 12:54:55 -04:00
// find key ids to given emails in database
boolean manySameUserIds = false;
boolean missingUserIds = false;
ArrayList<Long> keyIds = new ArrayList<Long>();
for (String email : encryptionUserIds) {
Uri uri = KeychainContract.KeyRings.buildPublicKeyRingsByEmailsUri(email);
Cursor cur = getContentResolver().query(uri, null, null, null, null);
if (cur.moveToFirst()) {
long id = cur.getLong(cur.getColumnIndex(KeychainContract.KeyRings.MASTER_KEY_ID));
keyIds.add(id);
} else {
missingUserIds = true;
Log.d(Constants.TAG, "user id missing");
}
if (cur.moveToNext()) {
manySameUserIds = true;
Log.d(Constants.TAG, "more than one user id with the same email");
}
}
// also encrypt to our self (so that we can decrypt it later!)
keyIds.add(ownKeyId);
2013-09-06 12:54:55 -04:00
// convert o long[]
long[] keyIdsArray = new long[keyIds.size()];
for (int i = 0; i < keyIdsArray.length; i++) {
keyIdsArray[i] = keyIds.get(i);
}
if (missingUserIds || manySameUserIds) {
Bundle extras = new Bundle();
extras.putLongArray(CryptoServiceActivity.EXTRA_SELECTED_MASTER_KEY_IDS, keyIdsArray);
pauseQueueAndStartServiceActivity(CryptoServiceActivity.ACTION_SELECT_PUB_KEYS, extras);
}
return keyIdsArray;
2013-09-06 12:54:55 -04:00
}
private synchronized void encryptAndSignSafe(byte[] inputBytes, String[] encryptionUserIds,
ICryptoCallback callback, AppSettings appSettings, boolean sign) throws RemoteException {
2013-06-17 13:51:41 -04:00
try {
// build InputData and write into OutputStream
InputStream inputStream = new ByteArrayInputStream(inputBytes);
long inputLength = inputBytes.length;
InputData inputData = new InputData(inputStream, inputLength);
2013-09-06 07:48:27 -04:00
OutputStream outputStream = new ByteArrayOutputStream();
long[] keyIds = getKeyIdsFromEmails(encryptionUserIds, appSettings.getKeyId());
2013-09-06 07:48:27 -04:00
2013-09-06 12:54:55 -04:00
if (sign) {
2013-09-08 12:21:04 -04:00
String passphrase = getCachedPassphrase(appSettings.getKeyId());
2013-09-06 12:54:55 -04:00
PgpMain.encryptAndSign(mContext, null, inputData, outputStream,
appSettings.isAsciiArmor(), appSettings.getCompression(), keyIds, null,
appSettings.getEncryptionAlgorithm(), appSettings.getKeyId(),
appSettings.getHashAlgorithm(), true, passphrase);
} else {
PgpMain.encryptAndSign(mContext, null, inputData, outputStream,
appSettings.isAsciiArmor(), appSettings.getCompression(), keyIds, null,
appSettings.getEncryptionAlgorithm(), Id.key.none,
appSettings.getHashAlgorithm(), true, null);
}
2013-06-17 13:51:41 -04:00
2013-09-06 07:48:27 -04:00
outputStream.close();
2013-06-17 13:51:41 -04:00
2013-09-06 07:48:27 -04:00
byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
2013-06-17 13:51:41 -04:00
2013-09-06 07:48:27 -04:00
// return over handler on client side
callback.onSuccess(outputBytes, null);
2013-06-17 13:51:41 -04:00
} catch (Exception e) {
Log.e(Constants.TAG, "KeychainService, Exception!", e);
try {
callback.onError(new CryptoError(0, e.getMessage()));
} catch (Exception t) {
Log.e(Constants.TAG, "Error returning exception to client", t);
}
}
}
2013-09-06 12:54:55 -04:00
private void signSafe(byte[] inputBytes, ICryptoCallback callback, AppSettings appSettings)
throws RemoteException {
2013-09-08 12:21:04 -04:00
try {
Log.d(Constants.TAG, "current therad id: " + Thread.currentThread().getId());
// build InputData and write into OutputStream
InputStream inputStream = new ByteArrayInputStream(inputBytes);
long inputLength = inputBytes.length;
InputData inputData = new InputData(inputStream, inputLength);
OutputStream outputStream = new ByteArrayOutputStream();
String passphrase = getCachedPassphrase(appSettings.getKeyId());
PgpMain.signText(this, null, inputData, outputStream, appSettings.getKeyId(),
passphrase, appSettings.getHashAlgorithm(), Preferences.getPreferences(this)
.getForceV3Signatures());
outputStream.close();
byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
// return over handler on client side
callback.onSuccess(outputBytes, null);
} catch (Exception e) {
Log.e(Constants.TAG, "KeychainService, Exception!", e);
try {
callback.onError(new CryptoError(0, e.getMessage()));
} catch (Exception t) {
Log.e(Constants.TAG, "Error returning exception to client", t);
}
}
2013-09-06 12:36:16 -04:00
}
private synchronized void decryptAndVerifySafe(byte[] inputBytes, ICryptoCallback callback,
AppSettings appSettings) throws RemoteException {
2013-05-28 09:10:36 -04:00
try {
// build InputData and write into OutputStream
InputStream inputStream = new ByteArrayInputStream(inputBytes);
long inputLength = inputBytes.length;
InputData inputData = new InputData(inputStream, inputLength);
2013-05-28 09:10:36 -04:00
2013-09-08 09:30:05 -04:00
Log.d(Constants.TAG, "in: " + new String(inputBytes));
OutputStream outputStream = new ByteArrayOutputStream();
2013-05-28 09:10:36 -04:00
2013-09-06 07:48:27 -04:00
// TODO: This allows to decrypt messages with ALL secret keys, not only the one for the
// app, Fix this?
long secretKeyId = PgpMain.getDecryptionKeyId(mContext, inputStream);
if (secretKeyId == Id.key.none) {
throw new PgpMain.PgpGeneralException(getString(R.string.error_noSecretKeyFound));
}
Log.d(Constants.TAG, "Got input:\n" + new String(inputBytes));
2013-05-28 09:10:36 -04:00
Log.d(Constants.TAG, "secretKeyId " + secretKeyId);
2013-05-28 09:10:36 -04:00
2013-09-06 07:48:27 -04:00
String passphrase = getCachedPassphrase(secretKeyId);
2013-05-28 09:10:36 -04:00
// if (signedOnly) {
// resultData = PgpMain.verifyText(this, this, inputData, outStream,
// lookupUnknownKey);
// } else {
// resultData = PgpMain.decryptAndVerify(this, this, inputData, outStream,
// PassphraseCacheService.getCachedPassphrase(this, secretKeyId),
// assumeSymmetricEncryption);
// }
2013-05-28 09:10:36 -04:00
Bundle outputBundle = PgpMain.decryptAndVerify(mContext, null, inputData, outputStream,
passphrase, false);
2013-05-28 09:10:36 -04:00
outputStream.close();
byte[] outputBytes = ((ByteArrayOutputStream) outputStream).toByteArray();
// get signature informations from bundle
boolean signature = outputBundle.getBoolean(KeychainIntentService.RESULT_SIGNATURE);
long signatureKeyId = outputBundle
.getLong(KeychainIntentService.RESULT_SIGNATURE_KEY_ID);
String signatureUserId = outputBundle
.getString(KeychainIntentService.RESULT_SIGNATURE_USER_ID);
boolean signatureSuccess = outputBundle
.getBoolean(KeychainIntentService.RESULT_SIGNATURE_SUCCESS);
boolean signatureUnknown = outputBundle
.getBoolean(KeychainIntentService.RESULT_SIGNATURE_UNKNOWN);
CryptoSignatureResult sigResult = new CryptoSignatureResult(signatureUserId, signature,
2013-05-28 09:10:36 -04:00
signatureSuccess, signatureUnknown);
// return over handler on client side
2013-07-01 17:19:53 -04:00
callback.onSuccess(outputBytes, sigResult);
2013-05-28 09:10:36 -04:00
} catch (Exception e) {
Log.e(Constants.TAG, "KeychainService, Exception!", e);
try {
callback.onError(new CryptoError(0, e.getMessage()));
2013-05-28 09:10:36 -04:00
} catch (Exception t) {
Log.e(Constants.TAG, "Error returning exception to client", t);
}
}
}
private final ICryptoService.Stub mBinder = new ICryptoService.Stub() {
@Override
2013-06-17 13:51:41 -04:00
public void encrypt(final byte[] inputBytes, final String[] encryptionUserIds,
final ICryptoCallback callback) throws RemoteException {
2013-05-28 09:10:36 -04:00
2013-09-06 07:48:27 -04:00
final AppSettings settings = getAppSettings();
2013-06-17 13:51:41 -04:00
Runnable r = new Runnable() {
@Override
public void run() {
try {
2013-09-06 12:54:55 -04:00
encryptAndSignSafe(inputBytes, encryptionUserIds, callback, settings, false);
2013-06-17 13:51:41 -04:00
} catch (RemoteException e) {
Log.e(Constants.TAG, "CryptoService", e);
}
}
};
checkAndEnqueue(r);
2013-05-28 09:10:36 -04:00
}
@Override
2013-09-06 12:36:16 -04:00
public void encryptAndSign(final byte[] inputBytes, final String[] encryptionUserIds,
2013-09-06 12:54:55 -04:00
final ICryptoCallback callback) throws RemoteException {
2013-09-06 12:36:16 -04:00
final AppSettings settings = getAppSettings();
Runnable r = new Runnable() {
@Override
public void run() {
try {
2013-09-06 12:54:55 -04:00
encryptAndSignSafe(inputBytes, encryptionUserIds, callback, settings, true);
2013-09-06 12:36:16 -04:00
} catch (RemoteException e) {
Log.e(Constants.TAG, "CryptoService", e);
}
}
};
checkAndEnqueue(r);
2013-05-28 09:10:36 -04:00
}
@Override
2013-09-06 12:54:55 -04:00
public void sign(final byte[] inputBytes, final ICryptoCallback callback)
2013-05-28 09:10:36 -04:00
throws RemoteException {
2013-09-06 12:54:55 -04:00
final AppSettings settings = getAppSettings();
Runnable r = new Runnable() {
@Override
public void run() {
try {
signSafe(inputBytes, callback, settings);
} catch (RemoteException e) {
Log.e(Constants.TAG, "CryptoService", e);
}
}
};
checkAndEnqueue(r);
2013-05-28 09:10:36 -04:00
}
@Override
public void decryptAndVerify(final byte[] inputBytes, final ICryptoCallback callback)
2013-05-28 09:10:36 -04:00
throws RemoteException {
2013-09-06 12:36:16 -04:00
final AppSettings settings = getAppSettings();
Runnable r = new Runnable() {
@Override
public void run() {
try {
2013-09-06 12:36:16 -04:00
decryptAndVerifySafe(inputBytes, callback, settings);
} catch (RemoteException e) {
Log.e(Constants.TAG, "CryptoService", e);
}
}
};
checkAndEnqueue(r);
2013-05-28 09:10:36 -04:00
}
2013-09-08 12:21:04 -04:00
// @Override
// public void setup(boolean asciiArmor, boolean newKeyring, String newKeyringUserId)
// throws RemoteException {
//
//
// }
2013-07-01 17:19:53 -04:00
2013-05-28 09:10:36 -04:00
};
2013-06-17 10:05:39 -04:00
private final IServiceActivityCallback.Stub mBinderServiceActivity = new IServiceActivityCallback.Stub() {
@Override
2013-07-25 10:25:20 -04:00
public void onRegistered(boolean success, String packageName) throws RemoteException {
2013-09-08 12:21:04 -04:00
Log.d(Constants.TAG, "current therad id: " + Thread.currentThread().getId());
2013-06-17 10:59:27 -04:00
if (success) {
// resume threads
2013-09-06 05:55:08 -04:00
if (isPackageAllowed(packageName, false)) {
mThreadPool.resume();
} else {
// TODO: should not happen?
2013-09-08 12:21:04 -04:00
mThreadPool.shutdownNow();
}
} else {
2013-09-08 12:21:04 -04:00
mThreadPool.resume();
// TODO
2013-09-08 12:21:04 -04:00
// mPoolQueue.clear();
// mPoolQueue.re
// mThreadPool.
}
}
@Override
2013-07-25 10:25:20 -04:00
public void onCachedPassphrase(boolean success) throws RemoteException {
2013-09-08 12:21:04 -04:00
Log.d(Constants.TAG, "current therad id: " + Thread.currentThread().getId());
mThreadPool.resume();
2013-09-08 13:24:47 -04:00
synchronized (userInputLock) {
userInputLock.notifyAll();
}
}
2013-09-08 09:30:05 -04:00
@Override
public void onSelectedPublicKeys(long[] keyIds) throws RemoteException {
2013-09-08 13:24:47 -04:00
mThreadPool.resume();
2013-09-08 09:30:05 -04:00
}
};
private void checkAndEnqueue(Runnable r) {
2013-09-06 05:55:08 -04:00
if (isCallerAllowed(false)) {
mThreadPool.execute(r);
Log.d(Constants.TAG, "Enqueued runnable…");
} else {
2013-06-17 10:59:27 -04:00
String[] callingPackages = getPackageManager()
.getPackagesForUid(Binder.getCallingUid());
Log.e(Constants.TAG, "Not allowed to use service! Starting activity for registration!");
Bundle extras = new Bundle();
// TODO: currently simply uses first entry
2013-09-06 05:55:08 -04:00
extras.putString(CryptoServiceActivity.EXTRA_PACKAGE_NAME, callingPackages[0]);
pauseQueueAndStartServiceActivity(CryptoServiceActivity.ACTION_REGISTER, extras);
2013-06-17 10:59:27 -04:00
mThreadPool.execute(r);
Log.d(Constants.TAG, "Enqueued runnable…");
}
}
/**
* Checks if process that binds to this service (i.e. the package name corresponding to the
* process) is in the list of allowed package names.
*
2013-09-06 05:55:08 -04:00
* @param allowOnlySelf
* allow only Keychain app itself
* @return true if process is allowed to use this service
*/
2013-09-06 05:55:08 -04:00
private boolean isCallerAllowed(boolean allowOnlySelf) {
String[] callingPackages = getPackageManager().getPackagesForUid(Binder.getCallingUid());
// is calling package allowed to use this service?
for (int i = 0; i < callingPackages.length; i++) {
String currentPkg = callingPackages[i];
2013-09-06 05:55:08 -04:00
if (isPackageAllowed(currentPkg, allowOnlySelf)) {
return true;
}
}
2013-06-17 10:59:27 -04:00
Log.d(Constants.TAG, "Caller is NOT allowed!");
return false;
}
2013-09-06 07:48:27 -04:00
private AppSettings getAppSettings() {
String[] callingPackages = getPackageManager().getPackagesForUid(Binder.getCallingUid());
// is calling package allowed to use this service?
for (int i = 0; i < callingPackages.length; i++) {
String currentPkg = callingPackages[i];
Uri uri = KeychainContract.ApiApps.buildByPackageNameUri(currentPkg);
AppSettings settings = ProviderHelper.getApiAppSettings(this, uri);
return settings;
}
return null;
}
2013-09-06 05:55:08 -04:00
/**
* Checks if packageName is a registered app for the API.
*
* @param packageName
* @param allowOnlySelf
* allow only Keychain app itself
* @return
*/
private boolean isPackageAllowed(String packageName, boolean allowOnlySelf) {
2013-06-17 10:59:27 -04:00
Log.d(Constants.TAG, "packageName: " + packageName);
2013-09-06 05:55:08 -04:00
ArrayList<String> allowedPkgs = ProviderHelper.getRegisteredApiApps(mContext);
2013-06-17 13:51:41 -04:00
Log.d(Constants.TAG, "allowed: " + allowedPkgs);
2013-06-17 10:59:27 -04:00
// check if package is allowed to use our service
2013-09-06 05:55:08 -04:00
if (allowedPkgs.contains(packageName) && (!allowOnlySelf)) {
2013-06-17 10:59:27 -04:00
Log.d(Constants.TAG, "Package is allowed! packageName: " + packageName);
return true;
} else if (Constants.PACKAGE_NAME.equals(packageName)) {
Log.d(Constants.TAG, "Package is OpenPGP Keychain! -> allowed!");
return true;
}
return false;
}
2013-06-17 10:05:39 -04:00
private void pauseQueueAndStartServiceActivity(String action, Bundle extras) {
mThreadPool.pause();
Log.d(Constants.TAG, "starting activity...");
2013-09-06 05:55:08 -04:00
Intent intent = new Intent(getBaseContext(), CryptoServiceActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(action);
if (extras != null) {
intent.putExtras(extras);
}
getApplication().startActivity(intent);
2013-05-28 09:10:36 -04:00
2013-09-08 13:24:47 -04:00
// lock current thread for user input
synchronized (userInputLock) {
try {
userInputLock.wait();
} catch (InterruptedException e) {
Log.e(Constants.TAG, "CryptoService", e);
}
}
}
2013-05-28 09:10:36 -04:00
}