/// <summary>
/// Authenticates the client, if the password characters match.
/// </summary>
/// <param name="password">The characters of the password.</param>
/// <returns><c>true</c> if authentication succeeded.</returns>
public bool Accept(char[] password)
{
Throw.If.Null(password, "password");
var response = new byte[16];
VncPasswordChallenge.GetChallengeResponse(this.challenge, password, response);
return(this.Test(response));
}
void NegotiateSecurity(AuthenticationMethod[] methods)
{
_c.SendByte((byte)methods.Length);
//验证密码
VncStream.Require(methods.Length > 0,
"Client is not allowed in.",
VncFailureReason.NoSupportedAuthenticationMethods);
foreach (var method in methods)
{
_c.SendByte((byte)method);
}
var selectedMethod = (AuthenticationMethod)_c.ReceiveByte();
VncStream.Require(methods.Contains(selectedMethod),
"Invalid authentication method.",
VncFailureReason.UnrecognizedProtocolElement);
bool success = true;
if (selectedMethod == AuthenticationMethod.Password)
{
var challenge = VncPasswordChallenge.GenerateChallenge();
using (new Utility.AutoClear(challenge))
{
_c.Send(challenge);
var response = _c.Receive(16);
using (new Utility.AutoClear(response))
{
var e = new PasswordProvidedEventArgs(challenge, response);
OnPasswordProvided(e);
success = e.IsAuthenticated;
}
}
}
_c.SendUInt32BE(success ? 0 : (uint)1);
if (!success)
{
_c.SendString("Password authentication failed!", true);
}
VncStream.Require(success,
"Failed to authenticate.",
VncFailureReason.AuthenticationFailed);
}
public void GetChallengeResponseTest()
{
VncPasswordChallenge challenger = new VncPasswordChallenge();
var challenge = new byte[]
{
0x71, 0x43, 0x19, 0xf2, 0xb3, 0xf6, 0xac, 0xcf,
0x8c, 0x10, 0xc0, 0x06, 0x6e, 0x73, 0xb1, 0xd9
};
var password = "******".ToCharArray();
var passwordBytes = VncStream.EncodeString(password, 0, password.Length);
var response = new byte[16];
challenger.GetChallengeResponse(challenge, passwordBytes, response);
var expectedResponse = new byte[]
{
0x71, 0xb3, 0x6f, 0xa2, 0x44, 0x5a, 0xee, 0x4f,
0x08, 0x70, 0x21, 0x69, 0x6e, 0x32, 0x87, 0x8e
};
Assert.Equal(expectedResponse, response);
}
