Example #1
0
        void receive_service_auth_message(Channel channel, ref EncKeys keys, KeyPair picoEphemeralKey, Nonce picoNonce, ref IntPtr serviceEphemKey, ref Nonce serviceNonce)
        {
            Json       json      = new Json();
            PicoBuffer buf       = new PicoBuffer(0);
            PicoBuffer iv        = new PicoBuffer(0);
            PicoBuffer cleartext = new PicoBuffer(0);

            channel.read(buf);
            json.deserialize(buf);

            Assert.AreEqual(json.get_decimal("sessionId"), 0);
            serviceEphemKey = CryptoSupport.read_base64_string_public_key(json.get_string("serviceEphemPublicKey"));
            buf.clear();
            Base64.decode(json.get_string("serviceNonce"), buf);
            serviceNonce = new Nonce();
            serviceNonce.set_buffer(buf);

            Base64.decode(json.get_string("iv"), iv);
            // Generate shared secrets
            PicoBuffer    sharedSecret;
            IntPtr        vEphemPriv;
            SigmaKeyDeriv sigmakeyderiv;

            sharedSecret = new PicoBuffer(0);
            vEphemPriv   = picoEphemeralKey.getprivatekey();
            KeyAgreement.generate_secret(vEphemPriv, serviceEphemKey, sharedSecret);
            sigmakeyderiv = new SigmaKeyDeriv();
            sigmakeyderiv.set(sharedSecret, picoNonce, serviceNonce);
            sharedSecret.delete();
            keys.pMacKey   = new PicoBuffer(0);
            keys.pEncKey   = new PicoBuffer(0);
            keys.vMacKey   = new PicoBuffer(0);
            keys.vEncKey   = new PicoBuffer(0);
            keys.sharedKey = new PicoBuffer(0);
            sigmakeyderiv.get_next_key(keys.pMacKey, 256);
            sigmakeyderiv.get_next_key(keys.pEncKey, 128);
            sigmakeyderiv.get_next_key(keys.vMacKey, 256);
            sigmakeyderiv.get_next_key(keys.vEncKey, 128);
            sigmakeyderiv.get_next_key(keys.sharedKey, 128);
            sigmakeyderiv.delete();

            buf.clear();
            Base64.decode(json.get_string("encryptedData"), buf);
            CryptoSupport.decrypt(keys.vEncKey, iv, buf, cleartext);

            int        start = 0;
            int        next  = 0;
            PicoBuffer servicePublicKeyBytes = new PicoBuffer(0);
            PicoBuffer serviceSignature      = new PicoBuffer(0);
            PicoBuffer serviceMac            = new PicoBuffer(0);

            next = cleartext.copy_lengthprepend(start, servicePublicKeyBytes);
            IntPtr servicePublicKey = CryptoSupport.read_buffer_public_key(servicePublicKeyBytes);

            Assert.IsTrue(next > start);
            next = cleartext.copy_lengthprepend(start, serviceSignature);
            Assert.IsTrue(next > start);
            next = cleartext.copy_lengthprepend(start, serviceMac);
            Assert.IsTrue(next > start);
            // TODO assert signature

            json.delete();
            buf.delete();
            cleartext.delete();
            servicePublicKeyBytes.delete();
            serviceSignature.delete();
            serviceMac.delete();
        }
Example #2
0
        public void KeyDeriv()
        {
            SigmaKeyDeriv sigmakeyderiv;
            PicoBuffer    sharedSecret;
            Nonce         picoNonce;
            Nonce         serviceNonce;
            PicoBuffer    keyBytes;
            PicoBuffer    nonceData;
            PicoBuffer    base64;

            sharedSecret = new PicoBuffer(0);
            sharedSecret.append("\x23\x02\x38\x40\x70\x23\x49\x08\x23\x04\x48\x20\x39\x48\x02\x70\x8");
            nonceData = new PicoBuffer(0);
            nonceData.append("\x01\x02\x03\x04\x05\x06\x07\x08");
            picoNonce = new Nonce();
            picoNonce.set_buffer(nonceData);

            nonceData.clear();
            nonceData.append("\x07\x04\x09\x02\x03\x07\x05\x06");
            serviceNonce = new Nonce();
            serviceNonce.set_buffer(nonceData);

            nonceData.delete();

            sigmakeyderiv = new SigmaKeyDeriv();
            sigmakeyderiv.set(sharedSecret, picoNonce, serviceNonce);

            sharedSecret.delete();;
            picoNonce.delete();
            serviceNonce.delete();

            // sharedKey
            keyBytes = new PicoBuffer(0);
            base64   = new PicoBuffer(0);
            sigmakeyderiv.get_next_key(keyBytes, 128);
            Base64.encode(keyBytes, base64);
            base64.append(new byte[] { 0x00 });
            Assert.AreEqual(base64.to_string(), "7iU6mLgArgvtO9HW0lvk/g==");

            // pMacKey
            keyBytes.clear();
            base64.clear();
            sigmakeyderiv.get_next_key(keyBytes, 256);
            Base64.encode(keyBytes, base64);
            base64.append(new byte[] { 0x00 });
            Assert.AreEqual(base64.to_string(), "L0VyA6JS5ZMggVMvJB22s61K+9INGk3OqK0eyJLMnSs=");

            // pEncKey
            keyBytes.clear();
            base64.clear();
            sigmakeyderiv.get_next_key(keyBytes, 128);
            Base64.encode(keyBytes, base64);
            base64.append(new byte[] { 0x00 });
            Assert.AreEqual(base64.to_string(), "ynUis+NzmrGp5yC3nX0Gjw==");

            // vMacKey
            keyBytes.clear();
            base64.clear();
            sigmakeyderiv.get_next_key(keyBytes, 256);
            Base64.encode(keyBytes, base64);
            base64.append(new byte[] { 0x00 });
            Assert.AreEqual(base64.to_string(), "J1mluN+sD9qrhdQ83vd/o7BKQvsq5l80t7CuTcs6A0A=");

            // pEncKey
            keyBytes.clear();
            base64.clear();
            sigmakeyderiv.get_next_key(keyBytes, 128);
            Base64.encode(keyBytes, base64);
            base64.append(new byte[] { 0x00 });
            Assert.AreEqual(base64.to_string(), "7HK9ZbFCzAiVXUnlzOGDVA==");

            keyBytes.delete();
            base64.delete();
            sigmakeyderiv.delete();
        }