public void TestSendEncryptedPacket()
{
SecureTunnel t = new SecureTunnel(this.tunnelSocket);
bool triggered = false;
byte[] server_epk = new byte[0];
this.tunnelSocket.InterceptOutgoingPacket(p =>
{
Assert.IsNotNull(p.EuphemeralPublicKey);
Assert.IsTrue(p.EuphemeralPublicKey.Length == 32);
Assert.IsTrue(p.HasEPK);
triggered = true;
server_epk = p.EuphemeralPublicKey;
});
String messageText = "The quick brown fox jumps over the lazy dog";
//create an encryption key
KeyPair keyPair = Sodium.PublicKeyBox.GenerateKeyPair();
EncryptedPacket hello = new EncryptedPacket(1000, 0);
hello.EuphemeralPublicKey = keyPair.PublicKey;
t.HandleHelloPacket(hello);
Assert.IsTrue(triggered);
//these are just to ensure that the keys have been exchanged correctly.
//We may want the response to a hello to be an encrypted rpc just for added protection -- there is no
//need for the EPK to be transferred in the clear at this point.
Assert.That(keyPair.PublicKey.SequenceEqual(t.recipentEPK));
Assert.That(!keyPair.PublicKey.SequenceEqual(server_epk));
Assert.That(t.mKeyPair.PublicKey.SequenceEqual(server_epk));
triggered = false;
this.tunnelSocket.InterceptOutgoingPacket(p =>
{
EncryptedPacket packet = (EncryptedPacket)p;
Assert.IsNotNull(packet.ToBytes());
if (packet.DecryptPacket(keyPair.PrivateKey, server_epk))
{
String msg = System.Text.ASCIIEncoding.ASCII.GetString(packet.Payload);
System.Console.WriteLine(msg);
//Assert.IsTrue(msg.Equals (messageText));
triggered = true;
}
else
{
Assert.Fail("Decryption failed");
}
});
EncryptedPacket sentPacket = new EncryptedPacket(1000, 0);
sentPacket.SetPayload(messageText);
t.EncryptAndSendPacket(sentPacket);
Assert.IsTrue(triggered);
}
private void SetupTunnelComms(SecureTunnel tunnel, out byte[] privateKey, out byte[] publicKey)
{
byte[] server_epk = new byte[0];
this.tunnelSocket.InterceptOutgoingPacket(p =>
{
Assert.IsNotNull(p.EuphemeralPublicKey);
Assert.IsTrue(p.EuphemeralPublicKey.Length == 32);
Assert.IsTrue(p.HasEPK);
server_epk = p.EuphemeralPublicKey;
});
String messageText = "The quick brown fox jumps over the lazy dog";
//create an encryption key
KeyPair keyPair = Sodium.PublicKeyBox.GenerateKeyPair();
EncryptedPacket hello = new EncryptedPacket(1000, 0);
hello.EuphemeralPublicKey = keyPair.PublicKey;
tunnel.HandleHelloPacket(hello);
privateKey = keyPair.PrivateKey;
publicKey = tunnel.mKeyPair.PublicKey;
}
