SmtpNtlmAuthenticationModule.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / Mail / SmtpNtlmAuthenticationModule.cs / 2 / SmtpNtlmAuthenticationModule.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Net.Mail 
{ 
    using System;
    using System.Collections; 
    using System.IO;
    using System.Net;
    using System.Security.Permissions;
 
    //
 
#if MAKE_MAILCLIENT_PUBLIC 
    internal
#else 
    internal
#endif
        class SmtpNtlmAuthenticationModule : ISmtpAuthenticationModule
    { 
        Hashtable sessions = new Hashtable();
 
        internal SmtpNtlmAuthenticationModule() 
        {
        } 

        #region ISmtpAuthenticationModule Members

        // Security this method will access NetworkCredential properties that demand UnmanagedCode and Environment Permission 
        [EnvironmentPermission(SecurityAction.Assert, Unrestricted=true)]
        [SecurityPermission(SecurityAction.Assert, Flags=SecurityPermissionFlag.UnmanagedCode)] 
        public Authorization Authenticate(string challenge, NetworkCredential credential, object sessionCookie) 
        {
            if(Logging.On)Logging.Enter(Logging.Web, this, "Authenticate", null); 
            try {
                lock (this.sessions)
                {
 
                    NTAuthentication clientContext = this.sessions[sessionCookie] as NTAuthentication;
                    if (clientContext == null) 
                    { 
                        if(credential == null){
                            return null; 
                        }

                        this.sessions[sessionCookie] = clientContext = new NTAuthentication(false,"Ntlm",credential,null,ContextFlags.Connection);
                    } 

                    string resp = (challenge != null ? clientContext.GetOutgoingBlob(challenge) : clientContext.GetOutgoingBlob(null)); 
 
                    if (!clientContext.IsCompleted)
                    { 
                        return new Authorization(resp, false);
                    }
                    else
                    { 
                        this.sessions.Remove(sessionCookie);
                        return new Authorization(resp, true); 
                    } 
                }
            } finally { 
                if(Logging.On)Logging.Exit(Logging.Web, this, "Authenticate", null);
            }
        }
 
        public string AuthenticationType
        { 
            get 
            {
                return "ntlm"; 
            }
        }

        public void CloseContext(object sessionCookie) { 
            // This is a no-op since the context is not
            // kept open by this module beyond auth completion. 
        } 

        #endregion 
    }
}

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