diff options
Diffstat (limited to 'src/de/gultsch/chat/crypto/OtrEngine.java')
| -rw-r--r-- | src/de/gultsch/chat/crypto/OtrEngine.java | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/src/de/gultsch/chat/crypto/OtrEngine.java b/src/de/gultsch/chat/crypto/OtrEngine.java deleted file mode 100644 index cdd71d61..00000000 --- a/src/de/gultsch/chat/crypto/OtrEngine.java +++ /dev/null @@ -1,232 +0,0 @@ -package de.gultsch.chat.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.content.Context; -import android.util.Log; - -import de.gultsch.chat.entities.Account; -import de.gultsch.chat.persistance.DatabaseBackend; -import de.gultsch.chat.xml.Element; -import de.gultsch.chat.xmpp.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 static final String LOGTAG = "xmppService"; - - private Account account; - private OtrPolicy otrPolicy; - private KeyPair keyPair; - private Context context; - - public OtrEngine(Context context, 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()); - } - - 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) { - // TODO Auto-generated catch block - e.printStackTrace(); - } catch (NoSuchAlgorithmException e) { - // TODO Auto-generated catch block - e.printStackTrace(); - } catch (InvalidKeySpecException e) { - // TODO Auto-generated catch block - e.printStackTrace(); - } - 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 { - // TODO Auto-generated method stub - - } - - @Override - public String getFallbackMessage(SessionID arg0) { - // TODO Auto-generated method stub - return null; - } - - @Override - public byte[] getLocalFingerprintRaw(SessionID arg0) { - // TODO Auto-generated method stub - return null; - } - - public PublicKey getPublicKey() { - 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(); - DatabaseBackend.getInstance(context).updateAccount(account); - } catch (NoSuchAlgorithmException e) { - Log.d(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()); //sender - packet.setTo(session.getAccountID()+"/"+session.getUserID()); //reciepient - packet.setBody(body); - Element privateTag = new Element("private"); - privateTag.setAttribute("xmlns","urn:xmpp:carbons:2"); - packet.addChild(privateTag); - packet.setType(MessagePacket.TYPE_CHAT); - account.getXmppConnection().sendMessagePacket(packet); - } - - @Override - public void messageFromAnotherInstanceReceived(SessionID arg0) { - // TODO Auto-generated method stub - - } - - @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 { - // TODO Auto-generated method stub - - } - - @Override - public void unencryptedMessageReceived(SessionID arg0, String arg1) - throws OtrException { - // TODO Auto-generated method stub - - } - - @Override - public void unreadableMessageReceived(SessionID arg0) throws OtrException { - // TODO Auto-generated method stub - - } - - @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 - - } - -} |