Examples with OtrCryptoEngineImpl net.java.otr4j.crypto.OtrCryptoEngineImpl used on opensource projects

Example 16 with OtrCryptoEngineImpl

use of net.java.otr4j.crypto.OtrCryptoEngineImpl in project Zom-Android by zom.

the class AuthContextImpl method handleSignatureMessage.

private void handleSignatureMessage(SignatureMessage m) throws OtrException {
    Session session = getSession();
    SessionID sessionID = session.getSessionID();
    logger.finest(sessionID.getLocalUserId() + " received a signature message from " + sessionID.getRemoteUserId() + " throught " + sessionID.getProtocolName() + ".");
    if (!session.getSessionPolicy().getAllowV2()) {
        logger.finest("Policy does not allow OTRv2, ignoring message.");
        return;
    }
    switch(this.getAuthenticationState()) {
        case AWAITING_SIG:
            // Verify MAC.
            if (!m.verify(this.getM2p())) {
                logger.finest("Signature MACs are not equal, ignoring message.");
                return;
            }
            // Decrypt X.
            byte[] remoteXDecrypted = m.decrypt(this.getCp());
            SignatureX remoteX;
            try {
                remoteX = SerializationUtils.toMysteriousX(remoteXDecrypted);
            } catch (IOException e) {
                throw new OtrException(e);
            }
            // Compute signature.
            PublicKey remoteLongTermPublicKey = remoteX.longTermPublicKey;
            SignatureM remoteM = new SignatureM(this.getRemoteDHPublicKey(), (DHPublicKey) this.getLocalDHKeyPair().getPublic(), remoteLongTermPublicKey, remoteX.dhKeyID);
            OtrCryptoEngine otrCryptoEngine = new OtrCryptoEngineImpl();
            // Verify signature.
            byte[] signature;
            try {
                signature = otrCryptoEngine.sha256Hmac(SerializationUtils.toByteArray(remoteM), this.getM1p());
            } catch (IOException e) {
                throw new OtrException(e);
            }
            if (!otrCryptoEngine.verify(signature, remoteLongTermPublicKey, remoteX.signature)) {
                session.showWarning("Bad signature");
                logger.finest("Signature verification failed.");
                return;
            }
            this.setIsSecure(true);
            this.setRemoteLongTermPublicKey(remoteLongTermPublicKey);
            break;
        default:
            logger.finest("We were not expecting a signature, ignoring message.");
            return;
    }
}

Example 17 with OtrCryptoEngineImpl

use of net.java.otr4j.crypto.OtrCryptoEngineImpl in project Zom-Android by zom.

the class OtrKeyManagerDefaultImpl method getLocalFingerprint.

public String getLocalFingerprint(SessionID sessionID) {
    KeyPair keyPair = loadLocalKeyPair(sessionID);
    if (keyPair == null)
        return null;
    PublicKey pubKey = keyPair.getPublic();
    try {
        return new OtrCryptoEngineImpl().getFingerprint(pubKey);
    } catch (OtrCryptoException e) {
        e.printStackTrace();
        return null;
    }
}

Example 18 with OtrCryptoEngineImpl

use of net.java.otr4j.crypto.OtrCryptoEngineImpl in project Zom-Android by zom.

the class OtrAndroidKeyManagerImpl method getRemoteFingerprint.

public String getRemoteFingerprint(String fullUserId) {
    String fingerprint = this.store.getProperty(fullUserId + ".fingerprint");
    if (fingerprint != null) {
        // If we have a fingerprint stashed, assume it is correct.
        return fingerprint;
    }
    // if we can't find an exact match, let's show the first one that matches the id sans resource
    for (Object fpKey : store.getKeySet().toArray()) {
        String fpKeyString = (String) fpKey;
        if (fpKeyString.startsWith(fullUserId) && fpKeyString.endsWith(".fingerprint")) {
            fingerprint = store.getProperty(fpKeyString);
            if (fingerprint != null)
                return fingerprint;
        }
    }
    PublicKey remotePublicKey = loadRemotePublicKeyFromStore(fullUserId);
    if (remotePublicKey == null)
        return null;
    try {
        // Store the fingerprint, for posterity.
        String fingerprintString = new OtrCryptoEngineImpl().getFingerprint(remotePublicKey);
        this.store.setProperty(fullUserId + ".fingerprint", fingerprintString);
        return fingerprintString;
    } catch (OtrCryptoException e) {
        throw new RuntimeException("OtrCryptoException getting remote fingerprint", e);
    }
}

Example 19 with OtrCryptoEngineImpl

use of net.java.otr4j.crypto.OtrCryptoEngineImpl in project Pix-Art-Messenger by kriztan.

the class Account method getOtrFingerprint.

public String getOtrFingerprint() {
    if (this.otrFingerprint == null) {
        try {
            if (this.mOtrService == null) {
                return null;
            }
            final PublicKey publicKey = this.mOtrService.getPublicKey();
            if (publicKey == null || !(publicKey instanceof DSAPublicKey)) {
                return null;
            }
            this.otrFingerprint = new OtrCryptoEngineImpl().getFingerprint(publicKey).toLowerCase(Locale.US);
            return this.otrFingerprint;
        } catch (final OtrCryptoException ignored) {
            return null;
        }
    } else {
        return this.otrFingerprint;
    }
}