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 NegotiateVersionNot38Test(string version)
{
using (var stream = new TestStream())
{
// Mimick the client negotiating RFB 3.8
VncStream clientStream = new VncStream(stream.Input);
clientStream.SendString(version);
stream.Input.Position = 0;
VncServerSession session = new VncServerSession();
session.Connect(stream, null, startThread: false);
Assert.True(session.NegotiateVersion(out AuthenticationMethod[] methods));
Assert.Empty(methods);
stream.Output.Position = 0;
Assert.Equal(Encoding.UTF8.GetBytes("RFB 003.008\n"), ((MemoryStream)stream.Output).ToArray());
}
}
public void NegotiateVersionBoth38Test(VncServerSessionOptions sessionOptions, AuthenticationMethod expectedAuthenticationMethod)
{
using (var stream = new TestStream())
{
// Mimick the client negotiating RFB 3.8
VncStream clientStream = new VncStream(stream.Input);
clientStream.SendString("RFB 003.008\n");
stream.Input.Position = 0;
VncServerSession session = new VncServerSession();
session.Connect(stream, sessionOptions, startThread: false);
Assert.True(session.NegotiateVersion(out AuthenticationMethod[] methods));
Assert.Collection(
methods,
(m) => Assert.Equal(expectedAuthenticationMethod, m));
stream.Output.Position = 0;
Assert.Equal(Encoding.UTF8.GetBytes("RFB 003.008\n"), ((MemoryStream)stream.Output).ToArray());
}
}
