KeyedHashAlgorithm.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / Security / Cryptography / KeyedHashAlgorithm.cs / 1 / 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 
        // 

        new static public KeyedHashAlgorithm Create() { 
            return Create("System.Security.Cryptography.KeyedHashAlgorithm");
        }

        new static public KeyedHashAlgorithm Create(String algName) { 
            return (KeyedHashAlgorithm) CryptoConfig.CreateFromName(algName);
        } 
    } 
}

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

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