SmtpDigestAuthenticationModule.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / Mail / SmtpDigestAuthenticationModule.cs / 1305376 / SmtpDigestAuthenticationModule.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;
    using System.Security.Authentication.ExtendedProtection; 
    //
 
#if MAKE_MAILCLIENT_PUBLIC 
    internal
#else 
    internal
#endif
 class SmtpDigestAuthenticationModule : ISmtpAuthenticationModule
    { 
        Hashtable sessions = new Hashtable();
 
        internal SmtpDigestAuthenticationModule() 
        {
        } 

        #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, string spn, ChannelBinding channelBindingToken) 
        {
 
            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, "WDigest", credential, spn, ContextFlags.Connection, channelBindingToken);
                } 
 
                string resp = clientContext.GetOutgoingBlob(challenge);
 
                if (!clientContext.IsCompleted)
                {
                    return new Authorization(resp, false);
                } 
                else
                { 
                    this.sessions.Remove(sessionCookie); 
                    return new Authorization(resp, true);
                } 
            }
        }

        public string AuthenticationType 
        {
            get 
            { 
                return "WDigest";
            } 
        }

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

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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