TransformBlockRequest.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 / TransformBlockRequest.cs / 1 / TransformBlockRequest.cs
                        

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

   //
   // Summary:
   // Manages an encryption request from the client against a specified cryptosession. 
   //
   class TransformBlockRequest : 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;
 
       //
       // The number of bytes to send back out of the transformed data buffer. 
       // 
       int m_outBlockSize;
 
        //
        // Sumamry:
        // Construct an TransformBlockRequest 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 TransformBlockRequest( 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_outBlockSize = session.TransformBlock( m_inBlock, out m_outBlock ); 

               IDT.DebugAssert( m_outBlockSize <= m_outBlock.Length, "size mismatch after TransformBlock" ); 
           }
           finally
           {
               Array.Clear( m_inBlock, 0, m_inBlock.Length ); 
           }
       } 
 

       protected override void OnMarshalOutArgs() 
       {
           IDT.ThrowInvalidArgumentConditional( null == OutArgs, "OutArgs" );
           IDT.ThrowInvalidArgumentConditional( null == m_outBlock, "outBlock" );
 
           BinaryWriter writer = new BinaryWriter( OutArgs );
 
           Utility.SerializeBytes( writer, m_outBlock, 0, m_outBlockSize ); 
       }
 
   }

}

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

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