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132 lines
4.4 KiB
C#
132 lines
4.4 KiB
C#
using System;
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using System.Threading;
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using Renci.SshNet.Messages.Authentication;
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using Renci.SshNet.Messages;
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namespace Renci.SshNet
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{
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/// <summary>
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/// Provides functionality for "none" authentication method
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/// </summary>
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public class NoneAuthenticationMethod : AuthenticationMethod, IDisposable
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{
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private AuthenticationResult _authenticationResult = AuthenticationResult.Failure;
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private EventWaitHandle _authenticationCompleted = new AutoResetEvent(false);
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/// <summary>
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/// Gets connection name
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/// </summary>
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public override string Name
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{
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get { return "none"; }
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="NoneAuthenticationMethod"/> class.
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/// </summary>
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/// <param name="username">The username.</param>
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/// <exception cref="ArgumentException"><paramref name="username"/> is whitespace or <c>null</c>.</exception>
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public NoneAuthenticationMethod(string username)
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: base(username)
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{
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}
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/// <summary>
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/// Authenticates the specified session.
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/// </summary>
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/// <param name="session">The session.</param>
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/// <returns>
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/// Result of authentication process.
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/// </returns>
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/// <exception cref="ArgumentNullException"><paramref name="session" /> is <c>null</c>.</exception>
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public override AuthenticationResult Authenticate(Session session)
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{
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if (session == null)
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throw new ArgumentNullException("session");
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session.UserAuthenticationSuccessReceived += Session_UserAuthenticationSuccessReceived;
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session.UserAuthenticationFailureReceived += Session_UserAuthenticationFailureReceived;
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try
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{
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session.SendMessage(new RequestMessageNone(ServiceName.Connection, Username));
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session.WaitOnHandle(_authenticationCompleted);
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}
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finally
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{
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session.UserAuthenticationSuccessReceived -= Session_UserAuthenticationSuccessReceived;
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session.UserAuthenticationFailureReceived -= Session_UserAuthenticationFailureReceived;
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}
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return _authenticationResult;
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}
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private void Session_UserAuthenticationSuccessReceived(object sender, MessageEventArgs<SuccessMessage> e)
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{
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_authenticationResult = AuthenticationResult.Success;
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_authenticationCompleted.Set();
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}
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private void Session_UserAuthenticationFailureReceived(object sender, MessageEventArgs<FailureMessage> e)
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{
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if (e.Message.PartialSuccess)
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_authenticationResult = AuthenticationResult.PartialSuccess;
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else
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_authenticationResult = AuthenticationResult.Failure;
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// Copy allowed authentication methods
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AllowedAuthentications = e.Message.AllowedAuthentications;
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_authenticationCompleted.Set();
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}
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#region IDisposable Members
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private bool _isDisposed;
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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/// <summary>
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/// Releases unmanaged and - optionally - managed resources
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/// </summary>
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/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
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protected virtual void Dispose(bool disposing)
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{
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if (_isDisposed)
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return;
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if (disposing)
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{
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var authenticationCompleted = _authenticationCompleted;
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if (authenticationCompleted != null)
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{
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authenticationCompleted.Dispose();
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_authenticationCompleted = null;
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}
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_isDisposed = true;
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}
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}
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/// <summary>
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/// Releases unmanaged resources and performs other cleanup operations before the
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/// <see cref="NoneAuthenticationMethod"/> is reclaimed by garbage collection.
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/// </summary>
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~NoneAuthenticationMethod()
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{
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Dispose(false);
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}
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#endregion
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}
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}
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