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Migrate to Curve25519.

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1) Generate a Curve25519 identity key.

2) Use Curve25519 ephemerals and identities for v2 3DHE agreements.

3) Initiate v2 key exchange messages.

4) Accept v1 key exchange messages.

5) TOFU Curve25519 identities.
This commit is contained in:
Moxie Marlinspike
2013-11-10 04:15:29 -08:00
parent a03fff8b24
commit c38a8aa699
57 changed files with 2197 additions and 498 deletions
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9
src/org/thoughtcrime/securesms/crypto/DecryptingQueue.java
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@@ -1,5 +1,6 @@
/**
* Copyright (C) 2011 Whisper Systems
* Copyright (C) 2013 Open Whisper Systems
*
* 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
@@ -47,6 +48,8 @@ import org.whispersystems.textsecure.crypto.KeyUtil;
import org.whispersystems.textsecure.crypto.MasterSecret;
import org.whispersystems.textsecure.crypto.MessageCipher;
import org.whispersystems.textsecure.crypto.SessionCipher;
import org.whispersystems.textsecure.crypto.ecc.Curve;
import org.whispersystems.textsecure.crypto.ecc.ECPublicKey;
import org.whispersystems.textsecure.push.IncomingPushMessage;
import org.whispersystems.textsecure.util.Hex;
@@ -195,7 +198,7 @@ public class DecryptingQueue {
return;
}
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret);
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret, Curve.DJB_TYPE);
MessageCipher messageCipher = new MessageCipher(context, masterSecret, identityKey);
byte[] plaintextBody = messageCipher.decrypt(recipient, message.getBody());
@@ -276,7 +279,7 @@ public class DecryptingQueue {
synchronized (SessionCipher.CIPHER_LOCK) {
Log.w("DecryptingQueue", "Decrypting: " + Hex.toString(ciphertextPduBytes));
TextTransport transportDetails = new TextTransport();
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret);
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret, Curve.DJB_TYPE);
MessageCipher messageCipher = new MessageCipher(context, masterSecret, identityKey);
byte[] ciphertext = transportDetails.getDecodedMessage(ciphertextPduBytes);
@@ -360,7 +363,7 @@ public class DecryptingQueue {
}
SmsTransportDetails transportDetails = new SmsTransportDetails();
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret);
IdentityKeyPair identityKey = IdentityKeyUtil.getIdentityKeyPair(context, masterSecret, Curve.DJB_TYPE);
MessageCipher messageCipher = new MessageCipher(context, masterSecret, identityKey);
byte[] ciphertext = transportDetails.getDecodedMessage(body.getBytes());
byte[] paddedPlaintext = messageCipher.decrypt(recipient, ciphertext);