InfoCardRSACryptoProvider.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / infocard / Client / System / IdentityModel / Selectors / InfoCardRSACryptoProvider.cs / 1 / InfoCardRSACryptoProvider.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.IdentityModel.Selectors 
{
    using System; 
    using System.ComponentModel; 
    using System.Runtime.InteropServices;
    using System.Runtime.ConstrainedExecution; 
    using System.Runtime.CompilerServices;
    using System.Security.Cryptography;
    using IDT = Microsoft.InfoCards.Diagnostics.InfoCardTrace;
    using DiagnosticUtility = Microsoft.InfoCards.Diagnostics.DiagnosticUtility; 

 
    // 
    // For common & resources
    // 
    using Microsoft.InfoCards;


    // 
    // Summary:
    //  This class provides indirect access to the private key associated with a released token via InfoCard 
    //  native crypto functions. 
    //
    internal class InfoCardRSACryptoProvider : RSA 
    {
        AsymmetricCryptoHandle         m_cryptoHandle;
        RpcAsymmetricCryptoParameters  m_params;
 
        //
        // Summary: 
        //  Given a pointer to a CryptoHandle create a new instance of this class. 
        //
        public InfoCardRSACryptoProvider( AsymmetricCryptoHandle cryptoHandle ) : base() 
        {
            m_cryptoHandle = (AsymmetricCryptoHandle)cryptoHandle.Duplicate();

            try 
            {
                m_params = (RpcAsymmetricCryptoParameters) m_cryptoHandle.Parameters; 
 
                int keySize = m_params.keySize;
 
                LegalKeySizesValue = new KeySizes[ 1 ];
                KeySizeValue = keySize;
                LegalKeySizesValue[ 0 ] = new KeySizes( keySize, keySize, 0 );
            } 
            catch
            { 
                m_cryptoHandle.Dispose(); 
                m_cryptoHandle = null;
                throw; 
            }
        }

        public override String SignatureAlgorithm { 
            get { return m_params.signatureAlgorithm; }
        } 
 
        public override String KeyExchangeAlgorithm {
            get { return m_params.keyExchangeAlgorithm; } 
        }

        public override byte[] EncryptValue( byte[] rgb )
        { 
            throw IDT.ThrowHelperError( new NotSupportedException() );
        } 
 
        public override byte[] DecryptValue( byte[] rgb )
        { 
            throw IDT.ThrowHelperError( new NotSupportedException() );
        }

        public byte[] Decrypt(byte[] inData, bool fAOEP ) 
        {
            GlobalAllocSafeHandle pOutData = null; 
            int cbOutData = 0; 
            byte[] outData;
            IDT.ThrowInvalidArgumentConditional( null == inData, "indata" ); 
            using( HGlobalSafeHandle pInData = HGlobalSafeHandle.Construct( inData.Length ) )
            {
                Marshal.Copy( inData, 0, pInData.DangerousGetHandle(), inData.Length );
                int status = NativeMethods.Decrypt( m_cryptoHandle.InternalHandle, 
                                                    fAOEP,
                                                    inData.Length, 
                                                    pInData, 
                                                    out cbOutData,
                                                    out pOutData ); 

                if( 0 != status )
                {
                    ExceptionHelper.ThrowIfCardSpaceException( status ); 
                    throw IDT.ThrowHelperError( new Win32Exception( status ) );
                } 
                pOutData.Length = cbOutData; 
                outData = DiagnosticUtility.Utility.AllocateByteArray( pOutData.Length );
                using( pOutData ) 
                {
                    Marshal.Copy( pOutData.DangerousGetHandle(), outData, 0, pOutData.Length );
                }
            } 

            return outData; 
        } 

        public byte[] Encrypt(byte[] inData, bool fAOEP ) 
        {
            GlobalAllocSafeHandle pOutData = null;
            int cbOutData = 0;
            byte[] outData; 
            IDT.ThrowInvalidArgumentConditional( null == inData, "indata" );
            using( HGlobalSafeHandle pInData = HGlobalSafeHandle.Construct( inData.Length ) ) 
            { 
                Marshal.Copy( inData, 0, pInData.DangerousGetHandle(), inData.Length );
                int status = NativeMethods.Encrypt( m_cryptoHandle.InternalHandle, 
                                                    fAOEP,
                                                    inData.Length,
                                                    pInData,
                                                    out cbOutData, 
                                                    out pOutData );
 
                if( 0 != status ) 
                {
                    ExceptionHelper.ThrowIfCardSpaceException( status ); 
                    throw IDT.ThrowHelperError( new Win32Exception( status ) );
                }

                pOutData.Length = cbOutData; 
                outData = DiagnosticUtility.Utility.AllocateByteArray( pOutData.Length );
                Marshal.Copy( pOutData.DangerousGetHandle(), outData, 0, pOutData.Length ); 
            } 

            return outData; 
        }

        public byte[] SignHash( byte[] hash, string hashAlgOid )
        { 
            IDT.ThrowInvalidArgumentConditional( null == hash || 0 == hash.Length, "hash" );
            IDT.ThrowInvalidArgumentConditional( String.IsNullOrEmpty( hashAlgOid ), "hashAlgOid" ); 
            int    cbSig       = 0; 
            GlobalAllocSafeHandle pSig        = null;
            byte[] sig; 
            using( HGlobalSafeHandle pHash = HGlobalSafeHandle.Construct( hash.Length ) )
            {
                using( HGlobalSafeHandle pHashAlgOid = HGlobalSafeHandle.Construct( hashAlgOid ) )
                { 

                    Marshal.Copy( hash, 0, pHash.DangerousGetHandle(), hash.Length ); 
 
                    RuntimeHelpers.PrepareConstrainedRegions();
                    int status = NativeMethods.SignHash( m_cryptoHandle.InternalHandle, 
                                                         hash.Length,
                                                         pHash,
                                                         pHashAlgOid,
                                                         out cbSig, 
                                                         out pSig );
 
                    if( 0 != status ) 
                    {
                        ExceptionHelper.ThrowIfCardSpaceException( status ); 
                        throw IDT.ThrowHelperError( new Win32Exception( status ) );
                    }
                    pSig.Length = cbSig;
                    sig = DiagnosticUtility.Utility.AllocateByteArray( pSig.Length); 
                    using( pSig )
                    { 
                        Marshal.Copy( pSig.DangerousGetHandle(), sig, 0, pSig.Length ); 
                    }
 
                }
            }

            return sig; 
        }
 
        public bool VerifyHash( byte[] hash, string hashAlgOid, byte[] sig ) 
        {
            IDT.ThrowInvalidArgumentConditional( null == hash || 0 == hash.Length, "hash" ); 
            IDT.ThrowInvalidArgumentConditional( String.IsNullOrEmpty( hashAlgOid ), "hashAlgOid" );
            IDT.ThrowInvalidArgumentConditional( null == sig || 0 == sig.Length, "sig" );
            bool verified      = false;
            using( HGlobalSafeHandle pHash = HGlobalSafeHandle.Construct( hash.Length ) ) 
            {
                using( HGlobalSafeHandle pHashAlgOid = HGlobalSafeHandle.Construct( hashAlgOid ) ) 
                { 

 
                    Marshal.Copy( hash, 0, pHash.DangerousGetHandle(), hash.Length );
                    int status = 0;
                    using( HGlobalSafeHandle pSig = HGlobalSafeHandle.Construct( sig.Length ) )
                    { 
                        Marshal.Copy( sig, 0, pSig.DangerousGetHandle(), sig.Length );
 
                        status = NativeMethods.VerifyHash( m_cryptoHandle.InternalHandle, 
                                                               hash.Length,
                                                               pHash, 
                                                               pHashAlgOid,
                                                               sig.Length,
                                                               pSig,
                                                               out verified); 
                    }
                    if( 0 != status ) 
                    { 
                        ExceptionHelper.ThrowIfCardSpaceException( status );
                        throw IDT.ThrowHelperError( new Win32Exception( status ) ); 
                    }

                }
            } 

            return verified; 
        } 

        public override RSAParameters ExportParameters(bool includePrivateParameters) 
        {
            throw IDT.ThrowHelperError( new NotSupportedException() );
        }
 
        public override string ToXmlString(bool includePrivateParameters)
        { 
            throw IDT.ThrowHelperError( new NotSupportedException() ); 
        }
 
        public override void FromXmlString(string xmlString)
        {
            throw IDT.ThrowHelperError( new NotSupportedException() );
        } 

        public override void ImportParameters(System.Security.Cryptography.RSAParameters parameters) 
        { 
            throw IDT.ThrowHelperError( new NotSupportedException() );
        } 

        protected override void Dispose(bool disposing)
        {
            m_cryptoHandle.Dispose(); 
        }
    } 
} 

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

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