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//
// System.Security.Cryptography.RC2.cs
//
// Authors:
// Andrew Birkett (andy@nobugs.org)
// Sebastien Pouliot (sebastien@ximian.com)
//
// (C) 2004 Novell (http://www.novell.com)
//
//
// Copyright (C) 2004 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.
//
using System;
namespace System.Security.Cryptography {
// References:
// a. IETF RFC2286: A Description of the RC2(r) Encryption Algorithm
// http://www.ietf.org/rfc/rfc2268.txt
public abstract class RC2 : SymmetricAlgorithm {
public static new RC2 Create ()
{
return Create ("System.Security.Cryptography.RC2");
}
public static new RC2 Create (string algName)
{
return (RC2) CryptoConfig.CreateFromName (algName);
}
protected int EffectiveKeySizeValue;
public virtual int EffectiveKeySize {
get {
if (EffectiveKeySizeValue == 0)
return KeySizeValue;
else
return EffectiveKeySizeValue;
}
set {
EffectiveKeySizeValue = value;
}
}
public override int KeySize {
get { return base.KeySize; }
set {
base.KeySize = value;
EffectiveKeySizeValue = value;
}
}
public RC2 ()
{
KeySizeValue = 128;
BlockSizeValue = 64;
FeedbackSizeValue = 64;
// The RFC allows keys of 1 to 128 bytes, but MS impl only supports
// 40 to 128 bits, sigh.
LegalKeySizesValue = new KeySizes [1];
LegalKeySizesValue [0] = new KeySizes (40, 128, 8);
LegalBlockSizesValue = new KeySizes [1];
LegalBlockSizesValue [0] = new KeySizes (64, 64, 0);
}
}
}
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