KeyedHashAlgorithm.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 / KeyedHashAlgorithm.cs / 1305376 / KeyedHashAlgorithm.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
// KeyedHashAlgorithm.cs 
//

namespace System.Security.Cryptography {
    [System.Runtime.InteropServices.ComVisible(true)] 
    public abstract class KeyedHashAlgorithm : HashAlgorithm {
        protected byte[] KeyValue; 
 
        protected KeyedHashAlgorithm() {}
 
        // IDisposable methods
        protected override void Dispose(bool disposing) {
            // For keyed hash algorithms, we always want to zero out the key value
            if (disposing) { 
                if (KeyValue != null)
                    Array.Clear(KeyValue, 0, KeyValue.Length); 
                KeyValue = null; 
            }
            base.Dispose(disposing); 
        }

        //
        // public properties 
        //
 
        public virtual byte[] Key { 
            get { return (byte[]) KeyValue.Clone(); }
            set { 
                if (State != 0)
                    throw new CryptographicException(Environment.GetResourceString("Cryptography_HashKeySet"));
                KeyValue = (byte[]) value.Clone();
            } 
        }
 
        // 
        // public methods
        // 

        [System.Security.SecuritySafeCritical]  // auto-generated
        new static public KeyedHashAlgorithm Create() {
            return Create("System.Security.Cryptography.KeyedHashAlgorithm"); 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        new static public KeyedHashAlgorithm Create(String algName) {
            return (KeyedHashAlgorithm) CryptoConfig.CreateFromName(algName); 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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