RpcCryptoContext.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Service / managed / Microsoft / InfoCards / RpcCryptoContext.cs / 1 / RpcCryptoContext.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace Microsoft.InfoCards
{ 
    using System;
    using System.ComponentModel; 
    using System.IO; 
    using System.Runtime.InteropServices;
    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace; 

    //
    // Summary:
    //  The context class for perfoming RpcCrypto operations. 
    //
    internal class RpcCryptoContext : IDisposable 
    { 
        string  m_portName;
        string  m_contextKey; 
        IntPtr  m_idlHandle;
        object  m_syncRoot;
        bool    m_open;
        bool    m_disposed; 

        // 
        // Summary: 
        //  Creates a new RpcCryptoContext
        // 
        // Arguments:
        //  portName: The name of the port
        //  contextKey: The name of the context
        // 
        public RpcCryptoContext( string portName, string contextKey )
        { 
            m_portName = portName; 
            m_contextKey = contextKey;
            m_syncRoot = new object(); 
            m_disposed = false;
        }

        // 
        // Summary:
        //  DTOR 
        // 
        ~RpcCryptoContext()
        { 
            if( !m_disposed )
            {
                ((IDisposable)this).Dispose();
            } 
        }
 
 

        // 
        // Summary:
        //  Gets the ContextKye.
        //
        public string ContextKey 
        {
            get{ return m_contextKey; } 
        } 

        // 
        // Summary:
        //  Gets the native IdlHandle
        //
        public IntPtr InterfaceHandle 
        {
            get{ return m_idlHandle; } 
        } 

        // 
        // Summary:
        //  Indicates if the context is still open.
        //
        public bool IsOpen 
        {
            get{ return m_open; } 
        } 

        // 
        // Summary:
        //  Opens the context.
        //
        public void Open() 
        {
            ThrowIfDisposed(); 
 
            if( !m_open )
            { 
                try
                {
                    m_idlHandle = NativeMcppMethods.RpcCryptoOpen( m_portName );
                } 
                catch( Win32Exception we )
                { 
                    throw IDT.ThrowHelperError( new CommunicationException( null, we ) ); 
                }
                m_open = true; 
            }
        }

        // 
        // Summary:
        //  Closes the context. 
        // 
        public void Close()
        { 
            if( m_open )
            {
                try
                { 
                    NativeMcppMethods.RpcCryptoClose( m_idlHandle, m_contextKey );
                } 
                catch( Win32Exception we ) 
                {
                    throw IDT.ThrowHelperError( new CommunicationException( null, we ) ); 
                }
                m_idlHandle = IntPtr.Zero;
                m_open = false;
            } 
        }
 
        // 
        // Summary:
        //  Disposes the object if not alreay done. 
        //
        void IDisposable.Dispose()
        {
            if( !m_disposed ) 
            {
                lock( m_syncRoot ) 
                { 
                    if( !m_disposed )
                    { 
                        m_disposed = true;
                        try
                        {
                            Close(); 
                        }
                        catch( CommunicationException ie ) 
                        { 
                            //
                            // In case the RPC interface on the agent had already shutdown, 
                            // we will get this exception from Close( ) above. Dispose is NOT
                            // expected to throw, so catch this specific exception here.
                            //
                            string msg = ie.Message; 
                            IDT.TraceDebug( "Ignoring failure in RpcCryptoContext Close(): " + msg );
                        } 
                        m_portName = null; 
                        m_contextKey = null;
                        m_idlHandle = IntPtr.Zero; 
                        GC.SuppressFinalize( this );
                    }
                }
            } 
        }
 
        void ThrowIfDisposed() 
        {
            if( m_disposed ) 
            {
                throw IDT.ThrowHelperError( new ObjectDisposedException( "RpcCryptoContext" ) );
            }
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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RpcCryptoContext.cs source code in C# .NET

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