mono/mcs/class/System.Core/System.Security.Cryptography/Aes.cs

//
// System.Security.Cryptography.Aes.cs
//	based on mcs/class/corlib/System.Security.Cryptography/Rijndael.cs
//
// Authors:
//	Dan Lewis ([email protected])
//	Andrew Birkett ([email protected])
//	Sebastien Pouliot  <[email protected]>
//
// (C) 2002
// Copyright (C) 2004-2006,2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

// Since 4.0 (both FX and SL) this type is defined in mscorlib - before 4.0 it was in System.Core.dll
#if (INSIDE_CORLIB && (NET_4_0 || MOBILE)) || (!INSIDE_CORLIB && !NET_4_0 && !MOBILE)

using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace System.Security.Cryptography {

	// References:
	// a.	FIPS PUB 197: Advanced Encryption Standard
	//	http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

#if INSIDE_CORLIB
	// since 4.0 (both FX and SL) this type now resides inside mscorlib.dll and link back to System.Core.dll
	#if MOBILE
	// version has not changed between SL3 (System.Core) and SL4
	[TypeForwardedFrom (Consts.AssemblySystem_Core)]
	#elif NET_4_0
	// use 3.5 version
	[TypeForwardedFrom ("System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")]
	#endif
#endif
	public abstract class Aes : SymmetricAlgorithm {

		public static new Aes Create () 
		{
#if FULL_AOT_RUNTIME
			// The Aes base class was moved from System.Core to mscorlib - so we can't just return a new AesCryptoServiceProvider instance
			// note: the linker is aware of this condition
			return (Aes) Activator.CreateInstance (Type.GetType ("System.Security.Cryptography.AesManaged, " + Consts.AssemblySystem_Core));
#else
			return Create ("System.Security.Cryptography.AesCryptoServiceProvider, " + Consts.AssemblySystem_Core);
#endif
		}

		public static new Aes Create (string algorithmName) 
		{
			return (Aes) CryptoConfig.CreateFromName (algorithmName);
		}

		protected Aes ()
		{
			KeySizeValue = 256;
			BlockSizeValue = 128;
			LegalKeySizesValue = new KeySizes [1];
			LegalKeySizesValue [0] = new KeySizes (128, 256, 64);

			LegalBlockSizesValue = new KeySizes [1];
			LegalBlockSizesValue [0] = new KeySizes (128, 128, 0);
		}
	}
}
#endif