94 lines
2.6 KiB
C#
94 lines
2.6 KiB
C#
//
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// System.Security.Cryptography.RC2.cs
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//
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// Authors:
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// Andrew Birkett (andy@nobugs.org)
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// Sebastien Pouliot (sebastien@ximian.com)
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//
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// Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Runtime.InteropServices;
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namespace System.Security.Cryptography {
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// References:
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// a. IETF RFC2286: A Description of the RC2(r) Encryption Algorithm
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// http://www.ietf.org/rfc/rfc2268.txt
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[ComVisible (true)]
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public abstract class RC2 : SymmetricAlgorithm {
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public static new RC2 Create ()
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{
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#if FULL_AOT_RUNTIME
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return new System.Security.Cryptography.RC2CryptoServiceProvider ();
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#else
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return Create ("System.Security.Cryptography.RC2");
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#endif
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}
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public static new RC2 Create (string AlgName)
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{
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return (RC2) CryptoConfig.CreateFromName (AlgName);
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}
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protected int EffectiveKeySizeValue;
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public virtual int EffectiveKeySize {
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get {
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if (EffectiveKeySizeValue == 0)
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return KeySizeValue;
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else
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return EffectiveKeySizeValue;
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}
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set {
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EffectiveKeySizeValue = value;
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}
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}
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public override int KeySize {
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get { return base.KeySize; }
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set {
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base.KeySize = value;
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EffectiveKeySizeValue = value;
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}
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}
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protected RC2 ()
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{
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KeySizeValue = 128;
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BlockSizeValue = 64;
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FeedbackSizeValue = 8;
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// The RFC allows keys of 1 to 128 bytes, but MS impl only supports
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// 40 to 128 bits, sigh.
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LegalKeySizesValue = new KeySizes [1];
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LegalKeySizesValue [0] = new KeySizes (40, 128, 8);
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LegalBlockSizesValue = new KeySizes [1];
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LegalBlockSizesValue [0] = new KeySizes (64, 64, 0);
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}
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}
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}
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