Example #1
0
        /// <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);
            }
        }
Example #2
0
        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;
        }