TransformFinalBlockRequest.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 / TransformFinalBlockRequest.cs / 1 / TransformFinalBlockRequest.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
   using System;
   using System.IO; 
   using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace; 
   using System.Security.Principal;
   using System.Diagnostics; 

   //
   // Summary:
   // Manages an encryption request from the client against a specified cryptosession. 
   //
   class TransformFinalBlockRequest : ClientRequest 
   { 
       //
       // The cryptosession id we are attaching to. 
       //
       int m_cryptoSession;

       // 
       // The cleartext data we wish to transfrom
       // 
       byte[] m_inBlock; 

       // 
       // The transformed data.
       //
       byte[] m_outBlock;
 
        //
        // Sumamry: 
        // Construct an TransformFinalBlockRequest object 
        //
        // Arguments: 
        //  callingProcess          - The process in which the caller originated.
        //  callingIdentity         - The WindowsIdentity of the caller
        //  rpcHandle               - The handle of the native RPC request
        //  inArgs                  - The stream to read input data from 
        //  outArgs                 - The stream to write output data to
        // 
       public TransformFinalBlockRequest( Process callingProcess, WindowsIdentity callingIdentity, IntPtr rpcHandle, Stream inArgs, Stream outArgs ) 
           : base( callingProcess, callingIdentity, rpcHandle, inArgs, outArgs )
       { 
           IDT.TraceDebug( "Intiating an Encrypt request" );
       }

 
       protected override void OnMarshalInArgs()
       { 
           IDT.DebugAssert( null != InArgs, "null inargs" ); 
           BinaryReader reader = new InfoCardBinaryReader( InArgs );
 
           m_cryptoSession   = reader.ReadInt32();
           int count         = reader.ReadInt32();
           m_inBlock         = reader.ReadBytes( count );
 
           IDT.ThrowInvalidArgumentConditional( 0 == m_cryptoSession, "cryptoSession" );
           IDT.ThrowInvalidArgumentConditional( null == m_inBlock || 0 == m_inBlock.Length, "inBlock" ); 
       } 

       // 
       // Summary:
       // Attach to the appropriate cryptosession and encrypt/decrypt the data.
       //
       protected override void OnProcess() 
       {
           try 
           { 
               TransformCryptoSession session =
                   (TransformCryptoSession) CryptoSession.Find( m_cryptoSession, CallerPid, RequestorIdentity.User ); 

               m_outBlock = session.TransformFinalBlock( m_inBlock );
           }
           finally 
           {
               Array.Clear( m_inBlock, 0, m_inBlock.Length ); 
           } 
       }
 

       protected override void OnMarshalOutArgs()
       {
           IDT.DebugAssert( null != OutArgs, "Null out args" ); 
           IDT.DebugAssert( null != m_outBlock, "null outBlock buffer" );
 
           BinaryWriter writer = new BinaryWriter( OutArgs ); 

           Utility.SerializeBytes( writer, m_outBlock ); 
       }

   }
 
}

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

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