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-rw-r--r--src/main/java/eu/siacs/conversations/crypto/OtrEngine.java231
-rw-r--r--src/main/java/eu/siacs/conversations/crypto/PgpEngine.java385
2 files changed, 616 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java b/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
new file mode 100644
index 00000000..e0bd0e79
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/crypto/OtrEngine.java
@@ -0,0 +1,231 @@
+package eu.siacs.conversations.crypto;
+
+import java.math.BigInteger;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.spec.DSAPrivateKeySpec;
+import java.security.spec.DSAPublicKeySpec;
+import java.security.spec.InvalidKeySpecException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import android.util.Log;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
+
+import net.java.otr4j.OtrEngineHost;
+import net.java.otr4j.OtrException;
+import net.java.otr4j.OtrPolicy;
+import net.java.otr4j.OtrPolicyImpl;
+import net.java.otr4j.session.InstanceTag;
+import net.java.otr4j.session.SessionID;
+
+public class OtrEngine implements OtrEngineHost {
+
+ private Account account;
+ private OtrPolicy otrPolicy;
+ private KeyPair keyPair;
+ private XmppConnectionService mXmppConnectionService;
+
+ public OtrEngine(XmppConnectionService service, Account account) {
+ this.account = account;
+ this.otrPolicy = new OtrPolicyImpl();
+ this.otrPolicy.setAllowV1(false);
+ this.otrPolicy.setAllowV2(true);
+ this.otrPolicy.setAllowV3(true);
+ this.keyPair = loadKey(account.getKeys());
+ this.mXmppConnectionService = service;
+ }
+
+ private KeyPair loadKey(JSONObject keys) {
+ if (keys == null) {
+ return null;
+ }
+ try {
+ BigInteger x = new BigInteger(keys.getString("otr_x"), 16);
+ BigInteger y = new BigInteger(keys.getString("otr_y"), 16);
+ BigInteger p = new BigInteger(keys.getString("otr_p"), 16);
+ BigInteger q = new BigInteger(keys.getString("otr_q"), 16);
+ BigInteger g = new BigInteger(keys.getString("otr_g"), 16);
+ KeyFactory keyFactory = KeyFactory.getInstance("DSA");
+ DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, p, q, g);
+ DSAPrivateKeySpec privateKeySpec = new DSAPrivateKeySpec(x, p, q, g);
+ PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);
+ PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec);
+ return new KeyPair(publicKey, privateKey);
+ } catch (JSONException e) {
+ return null;
+ } catch (NoSuchAlgorithmException e) {
+ return null;
+ } catch (InvalidKeySpecException e) {
+ return null;
+ }
+ }
+
+ private void saveKey() {
+ PublicKey publicKey = keyPair.getPublic();
+ PrivateKey privateKey = keyPair.getPrivate();
+ KeyFactory keyFactory;
+ try {
+ keyFactory = KeyFactory.getInstance("DSA");
+ DSAPrivateKeySpec privateKeySpec = keyFactory.getKeySpec(
+ privateKey, DSAPrivateKeySpec.class);
+ DSAPublicKeySpec publicKeySpec = keyFactory.getKeySpec(publicKey,
+ DSAPublicKeySpec.class);
+ this.account.setKey("otr_x", privateKeySpec.getX().toString(16));
+ this.account.setKey("otr_g", privateKeySpec.getG().toString(16));
+ this.account.setKey("otr_p", privateKeySpec.getP().toString(16));
+ this.account.setKey("otr_q", privateKeySpec.getQ().toString(16));
+ this.account.setKey("otr_y", publicKeySpec.getY().toString(16));
+ } catch (NoSuchAlgorithmException e) {
+ e.printStackTrace();
+ } catch (InvalidKeySpecException e) {
+ e.printStackTrace();
+ }
+
+ }
+
+ @Override
+ public void askForSecret(SessionID arg0, InstanceTag arg1, String arg2) {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void finishedSessionMessage(SessionID arg0, String arg1)
+ throws OtrException {
+
+ }
+
+ @Override
+ public String getFallbackMessage(SessionID arg0) {
+ return "I would like to start a private (OTR encrypted) conversation but your client doesn’t seem to support that";
+ }
+
+ @Override
+ public byte[] getLocalFingerprintRaw(SessionID arg0) {
+ // TODO Auto-generated method stub
+ return null;
+ }
+
+ public PublicKey getPublicKey() {
+ if (this.keyPair == null) {
+ return null;
+ }
+ return this.keyPair.getPublic();
+ }
+
+ @Override
+ public KeyPair getLocalKeyPair(SessionID arg0) throws OtrException {
+ if (this.keyPair == null) {
+ KeyPairGenerator kg;
+ try {
+ kg = KeyPairGenerator.getInstance("DSA");
+ this.keyPair = kg.genKeyPair();
+ this.saveKey();
+ mXmppConnectionService.databaseBackend.updateAccount(account);
+ } catch (NoSuchAlgorithmException e) {
+ Log.d(Config.LOGTAG,
+ "error generating key pair " + e.getMessage());
+ }
+ }
+ return this.keyPair;
+ }
+
+ @Override
+ public String getReplyForUnreadableMessage(SessionID arg0) {
+ // TODO Auto-generated method stub
+ return null;
+ }
+
+ @Override
+ public OtrPolicy getSessionPolicy(SessionID arg0) {
+ return otrPolicy;
+ }
+
+ @Override
+ public void injectMessage(SessionID session, String body)
+ throws OtrException {
+ MessagePacket packet = new MessagePacket();
+ packet.setFrom(account.getFullJid());
+ if (session.getUserID().isEmpty()) {
+ packet.setTo(session.getAccountID());
+ } else {
+ packet.setTo(session.getAccountID() + "/" + session.getUserID());
+ }
+ packet.setBody(body);
+ packet.addChild("private", "urn:xmpp:carbons:2");
+ packet.addChild("no-copy", "urn:xmpp:hints");
+ packet.setType(MessagePacket.TYPE_CHAT);
+ account.getXmppConnection().sendMessagePacket(packet);
+ }
+
+ @Override
+ public void messageFromAnotherInstanceReceived(SessionID id) {
+ Log.d(Config.LOGTAG,
+ "unreadable message received from " + id.getAccountID());
+ }
+
+ @Override
+ public void multipleInstancesDetected(SessionID arg0) {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void requireEncryptedMessage(SessionID arg0, String arg1)
+ throws OtrException {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void showError(SessionID arg0, String arg1) throws OtrException {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void smpAborted(SessionID arg0) throws OtrException {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void smpError(SessionID arg0, int arg1, boolean arg2)
+ throws OtrException {
+ throw new OtrException(new Exception("smp error"));
+ }
+
+ @Override
+ public void unencryptedMessageReceived(SessionID arg0, String arg1)
+ throws OtrException {
+ throw new OtrException(new Exception("unencrypted message received"));
+ }
+
+ @Override
+ public void unreadableMessageReceived(SessionID arg0) throws OtrException {
+ throw new OtrException(new Exception("unreadable message received"));
+ }
+
+ @Override
+ public void unverify(SessionID arg0, String arg1) {
+ // TODO Auto-generated method stub
+
+ }
+
+ @Override
+ public void verify(SessionID arg0, String arg1, boolean arg2) {
+ // TODO Auto-generated method stub
+
+ }
+
+}
diff --git a/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java b/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java
new file mode 100644
index 00000000..2696c7d2
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/crypto/PgpEngine.java
@@ -0,0 +1,385 @@
+package eu.siacs.conversations.crypto;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.openintents.openpgp.OpenPgpError;
+import org.openintents.openpgp.OpenPgpSignatureResult;
+import org.openintents.openpgp.util.OpenPgpApi;
+import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
+
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.Account;
+import eu.siacs.conversations.entities.Contact;
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.DownloadableFile;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.ui.UiCallback;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.graphics.BitmapFactory;
+import android.util.Log;
+
+public class PgpEngine {
+ private OpenPgpApi api;
+ private XmppConnectionService mXmppConnectionService;
+
+ public PgpEngine(OpenPgpApi api, XmppConnectionService service) {
+ this.api = api;
+ this.mXmppConnectionService = service;
+ }
+
+ public void decrypt(final Message message,
+ final UiCallback<Message> callback) {
+ Log.d(Config.LOGTAG, "decrypting message " + message.getUuid());
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
+ .getConversation().getAccount().getJid());
+ if (message.getType() == Message.TYPE_TEXT) {
+ InputStream is = new ByteArrayInputStream(message.getBody()
+ .getBytes());
+ final OutputStream os = new ByteArrayOutputStream();
+ api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+ OpenPgpApi.RESULT_CODE_ERROR)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ try {
+ os.flush();
+ if (message.getEncryption() == Message.ENCRYPTION_PGP) {
+ message.setBody(os.toString());
+ message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+ callback.success(message);
+ }
+ } catch (IOException e) {
+ callback.error(R.string.openpgp_error, message);
+ return;
+ }
+
+ return;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried((PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ message);
+ return;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ OpenPgpError error = result
+ .getParcelableExtra(OpenPgpApi.RESULT_ERROR);
+ Log.d(Config.LOGTAG,
+ "openpgp error: " + error.getMessage());
+ callback.error(R.string.openpgp_error, message);
+ return;
+ default:
+ return;
+ }
+ }
+ });
+ } else if (message.getType() == Message.TYPE_IMAGE) {
+ try {
+ final DownloadableFile inputFile = this.mXmppConnectionService
+ .getFileBackend().getFile(message, false);
+ final DownloadableFile outputFile = this.mXmppConnectionService
+ .getFileBackend().getFile(message, true);
+ outputFile.createNewFile();
+ InputStream is = new FileInputStream(inputFile);
+ OutputStream os = new FileOutputStream(outputFile);
+ api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+ OpenPgpApi.RESULT_CODE_ERROR)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ BitmapFactory.Options options = new BitmapFactory.Options();
+ options.inJustDecodeBounds = true;
+ BitmapFactory.decodeFile(
+ outputFile.getAbsolutePath(), options);
+ int imageHeight = options.outHeight;
+ int imageWidth = options.outWidth;
+ message.setBody(Long.toString(outputFile.getSize())
+ + ',' + imageWidth + ',' + imageHeight);
+ message.setEncryption(Message.ENCRYPTION_DECRYPTED);
+ PgpEngine.this.mXmppConnectionService
+ .updateMessage(message);
+ ;
+ callback.success(message);
+ return;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried(
+ (PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ message);
+ return;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ callback.error(R.string.openpgp_error, message);
+ return;
+ default:
+ return;
+ }
+ }
+ });
+ } catch (FileNotFoundException e) {
+ callback.error(R.string.error_decrypting_file, message);
+ } catch (IOException e) {
+ callback.error(R.string.error_decrypting_file, message);
+ }
+
+ }
+ }
+
+ public void encrypt(final Message message,
+ final UiCallback<Message> callback) {
+
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_ENCRYPT);
+ if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
+ long[] keys = { message.getConversation().getContact()
+ .getPgpKeyId() };
+ params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
+ } else {
+ params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation()
+ .getMucOptions().getPgpKeyIds());
+ }
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
+ .getConversation().getAccount().getJid());
+
+ if (message.getType() == Message.TYPE_TEXT) {
+ params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+
+ InputStream is = new ByteArrayInputStream(message.getBody()
+ .getBytes());
+ final OutputStream os = new ByteArrayOutputStream();
+ api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+ OpenPgpApi.RESULT_CODE_ERROR)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ try {
+ os.flush();
+ StringBuilder encryptedMessageBody = new StringBuilder();
+ String[] lines = os.toString().split("\n");
+ for (int i = 2; i < lines.length - 1; ++i) {
+ if (!lines[i].contains("Version")) {
+ encryptedMessageBody.append(lines[i].trim());
+ }
+ }
+ message.setEncryptedBody(encryptedMessageBody
+ .toString());
+ callback.success(message);
+ } catch (IOException e) {
+ callback.error(R.string.openpgp_error, message);
+ }
+
+ break;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried((PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ message);
+ break;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ callback.error(R.string.openpgp_error, message);
+ break;
+ }
+ }
+ });
+ } else if (message.getType() == Message.TYPE_IMAGE) {
+ try {
+ DownloadableFile inputFile = this.mXmppConnectionService
+ .getFileBackend().getFile(message, true);
+ DownloadableFile outputFile = this.mXmppConnectionService
+ .getFileBackend().getFile(message, false);
+ outputFile.createNewFile();
+ InputStream is = new FileInputStream(inputFile);
+ OutputStream os = new FileOutputStream(outputFile);
+ api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+ OpenPgpApi.RESULT_CODE_ERROR)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ callback.success(message);
+ break;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried(
+ (PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ message);
+ break;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ callback.error(R.string.openpgp_error, message);
+ break;
+ }
+ }
+ });
+ } catch (FileNotFoundException e) {
+ Log.d(Config.LOGTAG, "file not found: " + e.getMessage());
+ } catch (IOException e) {
+ Log.d(Config.LOGTAG, "io exception during file encrypt");
+ }
+ }
+ }
+
+ public long fetchKeyId(Account account, String status, String signature) {
+ if ((signature == null) || (api == null)) {
+ return 0;
+ }
+ if (status == null) {
+ status = "";
+ }
+ StringBuilder pgpSig = new StringBuilder();
+ pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----");
+ pgpSig.append('\n');
+ pgpSig.append('\n');
+ pgpSig.append(status);
+ pgpSig.append('\n');
+ pgpSig.append("-----BEGIN PGP SIGNATURE-----");
+ pgpSig.append('\n');
+ pgpSig.append('\n');
+ pgpSig.append(signature.replace("\n", "").trim());
+ pgpSig.append('\n');
+ pgpSig.append("-----END PGP SIGNATURE-----");
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
+ params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
+ InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
+ ByteArrayOutputStream os = new ByteArrayOutputStream();
+ Intent result = api.executeApi(params, is, os);
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
+ OpenPgpApi.RESULT_CODE_ERROR)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ OpenPgpSignatureResult sigResult = result
+ .getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE);
+ if (sigResult != null) {
+ return sigResult.getKeyId();
+ } else {
+ return 0;
+ }
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ return 0;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ Log.d(Config.LOGTAG,
+ "openpgp error: "
+ + ((OpenPgpError) result
+ .getParcelableExtra(OpenPgpApi.RESULT_ERROR))
+ .getMessage());
+ return 0;
+ }
+ return 0;
+ }
+
+ public void generateSignature(final Account account, String status,
+ final UiCallback<Account> callback) {
+ Intent params = new Intent();
+ params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
+ params.setAction(OpenPgpApi.ACTION_SIGN);
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
+ InputStream is = new ByteArrayInputStream(status.getBytes());
+ final OutputStream os = new ByteArrayOutputStream();
+ api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ StringBuilder signatureBuilder = new StringBuilder();
+ try {
+ os.flush();
+ String[] lines = os.toString().split("\n");
+ boolean sig = false;
+ for (String line : lines) {
+ if (sig) {
+ if (line.contains("END PGP SIGNATURE")) {
+ sig = false;
+ } else {
+ if (!line.contains("Version")) {
+ signatureBuilder.append(line.trim());
+ }
+ }
+ }
+ if (line.contains("BEGIN PGP SIGNATURE")) {
+ sig = true;
+ }
+ }
+ } catch (IOException e) {
+ callback.error(R.string.openpgp_error, account);
+ return;
+ }
+ account.setKey("pgp_signature", signatureBuilder.toString());
+ callback.success(account);
+ return;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried((PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ account);
+ return;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ callback.error(R.string.openpgp_error, account);
+ return;
+ }
+ }
+ });
+ }
+
+ public void hasKey(final Contact contact, final UiCallback<Contact> callback) {
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_GET_KEY);
+ params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
+ .getJid());
+ api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
+
+ @Override
+ public void onReturn(Intent result) {
+ switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
+ case OpenPgpApi.RESULT_CODE_SUCCESS:
+ callback.success(contact);
+ return;
+ case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
+ callback.userInputRequried((PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
+ contact);
+ return;
+ case OpenPgpApi.RESULT_CODE_ERROR:
+ callback.error(R.string.openpgp_error, contact);
+ return;
+ }
+ }
+ });
+ }
+
+ public PendingIntent getIntentForKey(Contact contact) {
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_GET_KEY);
+ params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
+ .getJid());
+ Intent result = api.executeApi(params, null, null);
+ return (PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT);
+ }
+
+ public PendingIntent getIntentForKey(Account account, long pgpKeyId) {
+ Intent params = new Intent();
+ params.setAction(OpenPgpApi.ACTION_GET_KEY);
+ params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
+ params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
+ Intent result = api.executeApi(params, null, null);
+ return (PendingIntent) result
+ .getParcelableExtra(OpenPgpApi.RESULT_INTENT);
+ }
+}