90 lines
3.0 KiB
C#
90 lines
3.0 KiB
C#
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//
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// Mono.Security.Cryptography SHA224 Class implementation
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//
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// Authors:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// Copyright (C) 2004 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.Security.Cryptography;
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namespace Mono.Security.Cryptography {
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// FIXME: Remove when (or if) SHA224 moves into corlib
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// (as corlib already have the required constants).
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internal sealed class SHAConstants {
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private SHAConstants ()
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{
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// Never instantiated.
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}
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// SHA-224/256 Constants
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// Represent the first 32 bits of the fractional parts of the
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// cube roots of the first sixty-four prime numbers
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public readonly static uint[] K1 = {
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0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
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0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
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0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
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0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
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0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
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0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
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0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
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0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
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0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
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0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
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0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
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0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
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0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
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0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
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0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
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0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
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};
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}
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public abstract class SHA224 : HashAlgorithm {
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public SHA224 ()
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{
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// SHA-224 hash length are 224 bits long
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HashSizeValue = 224;
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}
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public static new SHA224 Create ()
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{
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// for this to work we must register ourself with CryptoConfig
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return Create ("SHA224");
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}
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public static new SHA224 Create (string hashName)
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{
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object o = CryptoConfig.CreateFromName (hashName);
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// in case machine.config isn't configured to use any SHA224 implementation
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if (o == null) {
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o = new SHA224Managed ();
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}
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return (SHA224) o;
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}
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}
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}
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