public override bool Pass(INodeEndpointProtocolRequest request)
{
lock (this.stepLock)
{
switch (this.currentStep)
{
case Step.WaitingForUserName:
{
this.currentStep = Step.WaitingForEncryptedAuthData;
string userName = request.RequestMessage();
byte[] passwordMD5 = this.authenticationProvider.GetUserNamePasswordMD5(userName);
byte[] authData = new byte[128];
new Random().NextBytes(authData);
if (passwordMD5 != null)
{
this.expectedMixedAuthDataAndPassword = Md5AuthDataAndPassword(authData, passwordMD5);
}
request.Respond(authData);
}
return(false);
case Step.WaitingForEncryptedAuthData:
{
if (this.expectedMixedAuthDataAndPassword == null)
{
request.Respond("FAIL");
}
else
{
this.currentStep = Step.WaitingForPublicKey;
byte[] expected = this.expectedMixedAuthDataAndPassword;
byte[] actual = request.Message;
this.expectedMixedAuthDataAndPassword = null;
bool fail = false;
if (expected.Length != actual.Length)
{
fail = true;
}
else
{
for (int i = 0; i < expected.Length; i++)
{
if (expected[i] != actual[i])
{
fail = true;
break;
}
}
}
request.Respond(fail ? "FAIL" : "PASS");
}
}
return(false);
case Step.WaitingForPublicKey:
{
this.currentStep = Step.Done;
byte[] publicKey = request.Message;
byte[] key, iv;
Crypting.AesGenerateKey(out key, out iv);
byte[] message = new byte[sizeof(int) + key.Length + iv.Length];
StreamProtocol <Stream> .WriteLeadBytes(key.Length, message);
Array.Copy(key, 0, message, sizeof(int), key.Length);
Array.Copy(iv, 0, message, sizeof(int) + key.Length, iv.Length);
byte[] encryptedMessage = Crypting.RsaEncrypt(message, publicKey);
request.Respond(encryptedMessage);
SetKey(key, iv);
}
return(false);
}
}
return(true);
}
