diff options
author | Daniel Gultsch <daniel.gultsch@rwth-aachen.de> | 2014-02-28 18:46:01 +0100 |
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committer | Daniel Gultsch <daniel.gultsch@rwth-aachen.de> | 2014-02-28 18:46:01 +0100 |
commit | acf80bddd07d5579cdb20a888b3f9e99e53030a5 (patch) | |
tree | 034a8e364488c89c8e1997f56313d919019afa65 /src/de/gultsch/chat/crypto | |
parent | 03d96266f8bbb76e25610e903d74a0afa7dcd03b (diff) |
rebranding
Diffstat (limited to 'src/de/gultsch/chat/crypto')
-rw-r--r-- | src/de/gultsch/chat/crypto/OtrEngine.java | 232 | ||||
-rw-r--r-- | src/de/gultsch/chat/crypto/PgpEngine.java | 148 |
2 files changed, 0 insertions, 380 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 - - } - -} diff --git a/src/de/gultsch/chat/crypto/PgpEngine.java b/src/de/gultsch/chat/crypto/PgpEngine.java deleted file mode 100644 index 6d94e577..00000000 --- a/src/de/gultsch/chat/crypto/PgpEngine.java +++ /dev/null @@ -1,148 +0,0 @@ -package de.gultsch.chat.crypto; - -import java.io.ByteArrayInputStream; -import java.io.ByteArrayOutputStream; -import java.io.InputStream; - -import org.openintents.openpgp.OpenPgpError; -import org.openintents.openpgp.OpenPgpSignatureResult; -import org.openintents.openpgp.util.OpenPgpApi; -import org.openintents.openpgp.util.OpenPgpConstants; - -import android.app.PendingIntent; -import android.os.Bundle; -import android.util.Log; - -public class PgpEngine { - private OpenPgpApi api; - - public PgpEngine(OpenPgpApi api) { - this.api = api; - } - - public String decrypt(String message) throws UserInputRequiredException, - OpenPgpException { - InputStream is = new ByteArrayInputStream(message.getBytes()); - ByteArrayOutputStream os = new ByteArrayOutputStream(); - Bundle result = api.decryptAndVerify(is, os); - switch (result.getInt(OpenPgpConstants.RESULT_CODE)) { - case OpenPgpConstants.RESULT_CODE_SUCCESS: - return os.toString(); - case OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED: - throw new UserInputRequiredException( - (PendingIntent) result - .getParcelable(OpenPgpConstants.RESULT_INTENT)); - case OpenPgpConstants.RESULT_CODE_ERROR: - throw new OpenPgpException( - (OpenPgpError) result - .getParcelable(OpenPgpConstants.RESULT_ERRORS)); - default: - return null; - } - } - - public String encrypt(long keyId, String message) { - Bundle params = new Bundle(); - params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true); - long[] keyIds = { keyId }; - params.putLongArray(OpenPgpConstants.PARAMS_KEY_IDS, keyIds); - - InputStream is = new ByteArrayInputStream(message.getBytes()); - ByteArrayOutputStream os = new ByteArrayOutputStream(); - Bundle result = api.encrypt(params, is, os); - StringBuilder encryptedMessageBody = new StringBuilder(); - String[] lines = os.toString().split("\n"); - for (int i = 3; i < lines.length - 1; ++i) { - encryptedMessageBody.append(lines[i].trim()); - } - return encryptedMessageBody.toString(); - } - - public long fetchKeyId(String status, String signature) - throws OpenPgpException { - StringBuilder pgpSig = new StringBuilder(); - pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----"); - pgpSig.append('\n'); - pgpSig.append("Hash: SHA1"); - 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-----"); - Bundle params = new Bundle(); - params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true); - InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes()); - ByteArrayOutputStream os = new ByteArrayOutputStream(); - Bundle result = api.decryptAndVerify(params, is, os); - switch (result.getInt(OpenPgpConstants.RESULT_CODE)) { - case OpenPgpConstants.RESULT_CODE_SUCCESS: - OpenPgpSignatureResult sigResult = result - .getParcelable(OpenPgpConstants.RESULT_SIGNATURE); - return sigResult.getKeyId(); - case OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED: - break; - case OpenPgpConstants.RESULT_CODE_ERROR: - throw new OpenPgpException( - (OpenPgpError) result - .getParcelable(OpenPgpConstants.RESULT_ERRORS)); - } - return 0; - } - - public String generateSignature(String status) - throws UserInputRequiredException { - Bundle params = new Bundle(); - params.putBoolean(OpenPgpConstants.PARAMS_REQUEST_ASCII_ARMOR, true); - InputStream is = new ByteArrayInputStream(status.getBytes()); - ByteArrayOutputStream os = new ByteArrayOutputStream(); - Bundle result = api.sign(params, is, os); - StringBuilder signatureBuilder = new StringBuilder(); - switch (result.getInt(OpenPgpConstants.RESULT_CODE)) { - case OpenPgpConstants.RESULT_CODE_SUCCESS: - String[] lines = os.toString().split("\n"); - for (int i = 7; i < lines.length - 1; ++i) { - signatureBuilder.append(lines[i].trim()); - } - break; - case OpenPgpConstants.RESULT_CODE_USER_INTERACTION_REQUIRED: - UserInputRequiredException exception = new UserInputRequiredException( - (PendingIntent) result - .getParcelable(OpenPgpConstants.RESULT_INTENT)); - throw exception; - case OpenPgpConstants.RESULT_CODE_ERROR: - break; - } - return signatureBuilder.toString(); - } - - public class UserInputRequiredException extends Exception { - private static final long serialVersionUID = -6913480043269132016L; - private PendingIntent pi; - - public UserInputRequiredException(PendingIntent pi) { - this.pi = pi; - } - - public PendingIntent getPendingIntent() { - return this.pi; - } - } - - public class OpenPgpException extends Exception { - private static final long serialVersionUID = -7324789703473056077L; - private OpenPgpError error; - - public OpenPgpException(OpenPgpError openPgpError) { - this.error = openPgpError; - } - - public OpenPgpError getOpenPgpError() { - return this.error; - } - } -} |