2 // System.Security.Cryptography.RC2.cs
5 // Andrew Birkett (andy@nobugs.org)
6 // Sebastien Pouliot (sebastien@ximian.com)
8 // (C) 2004 Novell (http://www.novell.com)
12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
36 namespace System.Security.Cryptography {
39 // a. IETF RFC2286: A Description of the RC2(r) Encryption Algorithm
40 // http://www.ietf.org/rfc/rfc2268.txt
42 public abstract class RC2 : SymmetricAlgorithm {
44 public static new RC2 Create ()
46 return Create ("System.Security.Cryptography.RC2");
49 public static new RC2 Create (string algName)
51 return (RC2) CryptoConfig.CreateFromName (algName);
54 protected int EffectiveKeySizeValue;
56 public virtual int EffectiveKeySize {
58 if (EffectiveKeySizeValue == 0)
61 return EffectiveKeySizeValue;
64 EffectiveKeySizeValue = value;
68 public override int KeySize {
69 get { return base.KeySize; }
72 EffectiveKeySizeValue = value;
80 FeedbackSizeValue = 64;
82 // The RFC allows keys of 1 to 128 bytes, but MS impl only supports
83 // 40 to 128 bits, sigh.
84 LegalKeySizesValue = new KeySizes [1];
85 LegalKeySizesValue [0] = new KeySizes (40, 128, 8);
87 LegalBlockSizesValue = new KeySizes [1];
88 LegalBlockSizesValue [0] = new KeySizes (64, 64, 0);