//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
 
namespace System.IdentityModel.Selectors
{
    using System;
    using System.Security.Cryptography;
 
    internal class InfoCardRSAPKCS1KeyExchangeDeformatter : RSAPKCS1KeyExchangeDeformatter
    {
        RSA m_rsaKey;
 
        // Constructors
 
        public InfoCardRSAPKCS1KeyExchangeDeformatter() { }
 
        public InfoCardRSAPKCS1KeyExchangeDeformatter(AsymmetricAlgorithm key)
            : base(key)
        {
            m_rsaKey = (RSA)key;
        }
 
        //
        // public methods
        //
 
        public override byte[] DecryptKeyExchange(byte[] rgbIn)
        {
            if (null != m_rsaKey && m_rsaKey is InfoCardRSACryptoProvider)
            {
                return ((InfoCardRSACryptoProvider)m_rsaKey).Decrypt(rgbIn, false);
            }
            else
            {
                return base.DecryptKeyExchange(rgbIn);
            }
        }
 
        public override void SetKey(AsymmetricAlgorithm key)
        {
            base.SetKey(key);
            m_rsaKey = (RSA)key;
        }
    }
}