RSATokenProvider.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / RSATokenProvider.cs / 1 / RSATokenProvider.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
//
// Presharp uses the c# pragma mechanism to supress its warnings. 
// These are not recognised by the base compiler so we need to explictly
// disable the following warnings. See http://winweb/cse/Tools/PREsharp/userguide/default.asp 
// for details. 
//
#pragma warning disable 1634, 1691      // unknown message, unknown pragma 

namespace Microsoft.InfoCards
{
    using System; 
    using System.IdentityModel.Selectors;
    using System.IdentityModel.Tokens; 
    using System.ServiceModel; 
    using System.ServiceModel.Security;
    using System.ServiceModel.Security.Tokens; 
    using System.Runtime.InteropServices;
    using System.Security.Cryptography;
    using System.IdentityModel;
    using System.Security.Cryptography.Xml; 

    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace; 
    using System.Collections.ObjectModel; 
    using System.Collections.Generic;
 
    //
    // This class is used to provide a custom token provider for adding an endorsing signature token to the RST
    // message sent to a managed card STS.  The endorsing signature must be added if the UseKey field is present
    // in the RST. 
    //
    internal class RSATokenProvider : SecurityTokenProvider, IDisposable 
    { 
        InfoCardPolicy m_policy;
        InfoCard m_card; 
        SelfIssuedAuthProofToken m_RSAToken;

        public RSATokenProvider( InfoCardPolicy policy, InfoCard card )
        { 
            IDT.ThrowInvalidArgumentConditional( null == policy, "policy" );
            IDT.ThrowInvalidArgumentConditional( null == card, "card" ); 
 
            m_policy = policy;
            m_card = card; 
        }

        public void Dispose()
        { 
            //
            // We must dispose this token explicitly. 
            // 
            if ( null != m_RSAToken )
            { 
                m_RSAToken.Dispose();
                m_RSAToken = null;
            }
        } 

        // 
        // Summary 
        //   Retrieves a token from the system
        // 
        // Parameters
        //  timeout - The time span till the call times out
        //
        // Returns 
        //  The security token.
        // 
        protected override SecurityToken GetTokenCore(TimeSpan timeout) 
        {
            if( null == m_RSAToken ) 
            {
                //
                // The SelfIssuedAuthProofToken should be renamed.  In this case it's just acting as a generic
                // wrapper for an RSA key. 
                //
                m_RSAToken = new SelfIssuedAuthProofToken( m_card.GetPrivateCryptography( m_policy.Recipient.GetIdentifier() ), 
                                                           DateTime.UtcNow + timeout ); 
            }
 
            return m_RSAToken;
        }
    }
 

} 
 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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