KeyedHashAlgorithm.cs

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using System.Diagnostics.CodeAnalysis;
using Internal.Cryptography;
 
namespace System.Security.Cryptography;
 
public abstract class KeyedHashAlgorithm : HashAlgorithm
{
    protected byte[] KeyValue;
 
    public virtual byte[] Key
    {
        get
        {
            return KeyValue.CloneByteArray();
        }
        set
        {
            KeyValue = value.CloneByteArray();
        }
    }
 
    [Obsolete("The default implementation of this cryptography algorithm is not supported.", DiagnosticId = "SYSLIB0007", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
    public new static KeyedHashAlgorithm Create()
    {
        throw new PlatformNotSupportedException(System.SR.Cryptography_DefaultAlgorithm_NotSupported);
    }
 
    [RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
    public new static KeyedHashAlgorithm? Create(string algName)
    {
        return (KeyedHashAlgorithm)CryptoConfigForwarder.CreateFromName(algName);
    }
 
    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (KeyValue != null)
            {
                Array.Clear(KeyValue);
            }
            KeyValue = null;
        }
        base.Dispose(disposing);
    }
}