/// <summary>
/// <see cref = "PasswordProvided" /> 이벤트를 발생시킵니다.
/// Raises the <see cref="PasswordProvided"/> event.
/// </summary>
/// <param name="e">
/// The event arguments.
/// </param>
protected virtual void OnPasswordProvided(PasswordProvidedEventArgs e)
{
var ev = this.PasswordProvided;
if (ev != null)
{
ev(this, e);
}
}
private void NegotiateSecurity(AuthenticationMethod[] methods)
{
this.logger?.Log(LogLevel.Info, () => "Negotiating security");
this.c.SendByte((byte)methods.Length);
VncStream.Require(
methods.Length > 0,
"Client is not allowed in.",
VncFailureReason.NoSupportedAuthenticationMethods);
foreach (var method in methods)
{
this.c.SendByte((byte)method);
}
var selectedMethod = (AuthenticationMethod)this.c.ReceiveByte();
VncStream.Require(
methods.Contains(selectedMethod),
"Invalid authentication method.",
VncFailureReason.UnrecognizedProtocolElement);
bool success = true;
if (selectedMethod == AuthenticationMethod.Password)
{
var challenge = this.passwordChallenge.GenerateChallenge();
using (new Utility.AutoClear(challenge))
{
this.c.Send(challenge);
var response = this.c.Receive(16);
using (new Utility.AutoClear(response))
{
var e = new PasswordProvidedEventArgs(this.passwordChallenge, challenge, response);
this.OnPasswordProvided(e);
success = e.IsAuthenticated;
}
}
}
this.c.SendUInt32BE(success ? 0 : (uint)1);
VncStream.Require(
success,
"Failed to authenticate.",
VncFailureReason.AuthenticationFailed);
this.logger?.Log(LogLevel.Info, () => "The user authenticated successfully.");
this.securityNegotiated = true;
}