RSAOAEPKeyExchangeDeformatter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Cryptography / RSAOAEPKeyExchangeDeformatter.cs / 1305376 / RSAOAEPKeyExchangeDeformatter.cs
                        

                        
                            using System.Diagnostics.Contracts; 
// ==++==
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// ==--==
// [....] 
// 

namespace System.Security.Cryptography { 
    [System.Runtime.InteropServices.ComVisible(true)]
    public class RSAOAEPKeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter {
        private RSA _rsaKey; // RSA Key value to do decrypt operation
 
        //
        // public constructors 
        // 

        public RSAOAEPKeyExchangeDeformatter() {} 
        public RSAOAEPKeyExchangeDeformatter(AsymmetricAlgorithm key) {
            if (key == null)
                throw new ArgumentNullException("key");
            Contract.EndContractBlock(); 
            _rsaKey = (RSA) key;
        } 
 
        //
        // public properties 
        //

        public override String Parameters {
            get { return null; } 
            set { ; }
        } 
 
        //
        // public methods 
        //

        [System.Security.SecuritySafeCritical]  // auto-generated
        public override byte[] DecryptKeyExchange(byte[] rgbData) { 
            if (_rsaKey == null)
                throw new CryptographicUnexpectedOperationException(Environment.GetResourceString("Cryptography_MissingKey")); 
 
            if (_rsaKey is RSACryptoServiceProvider) {
                return ((RSACryptoServiceProvider) _rsaKey).Decrypt(rgbData, true); 
            } else {
                return Utils.RsaOaepDecrypt(_rsaKey, SHA1.Create(), new PKCS1MaskGenerationMethod(), rgbData);
            }
        } 

        public override void SetKey(AsymmetricAlgorithm key) { 
            if (key == null) 
                throw new ArgumentNullException("key");
            Contract.EndContractBlock(); 
            _rsaKey = (RSA) key;
        }
    }
} 

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

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