Aes.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 / Aes.cs / 1305376 / Aes.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

using System; 
using System.Runtime.CompilerServices; 

namespace System.Security.Cryptography { 
    /// 
    ///     Abstract base class for implementations of the AES algorithm
    /// 
#if !FEATURE_CORECLR 
    [TypeForwardedFrom("System.Core, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=b77a5c561934e089")]
#else // FEATURE_CORECLR 
    [TypeForwardedFrom("System.Core, Version=2.0.5.0, Culture=Neutral, PublicKeyToken=7cec85d7bea7798e")] 
#endif // !FEATURE_CORECLR
    public abstract class Aes : SymmetricAlgorithm { 
        private static KeySizes[] s_legalBlockSizes = { new KeySizes(128, 128, 0) };
        private static KeySizes[] s_legalKeySizes = { new KeySizes(128, 256, 64) };

        ///  
        ///     Setup the default values for AES encryption
        ///  
        protected Aes() { 
            LegalBlockSizesValue = s_legalBlockSizes;
            LegalKeySizesValue = s_legalKeySizes; 

            BlockSizeValue = 128;
            FeedbackSizeValue = 8;
            KeySizeValue = 256; 
            ModeValue = CipherMode.CBC;
        } 
 
        public static new Aes Create() {
            return Create("AES"); 
        }

        public static new Aes Create(string algorithmName) {
            if (algorithmName == null) { 
                throw new ArgumentNullException("algorithmName");
            } 
 
            return CryptoConfig.CreateFromName(algorithmName) as Aes;
        } 
    }
}

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

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