2 // HMACSHA512.cs: HMAC implementation using SHA512
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
8 // Copyright (C) 2004-2005, 2007 Novell, Inc (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Runtime.InteropServices;
32 using Mono.Security.Cryptography;
34 namespace System.Security.Cryptography {
37 public class HMACSHA512 : HMAC {
39 static bool legacy_mode;
44 legacy_mode = (Environment.GetEnvironmentVariable ("legacyHMACMode") == "1");
48 : this (KeyBuilder.Key (8))
50 ProduceLegacyHmacValues = legacy_mode;
53 public HMACSHA512 (byte[] key)
55 ProduceLegacyHmacValues = legacy_mode;
61 // this property will appear in the next .NET service pack
62 // http://blogs.msdn.com/shawnfa/archive/2007/01/31/please-do-not-use-the-net-2-0-hmacsha512-and-hmacsha384-classes.aspx
63 public bool ProduceLegacyHmacValues {
64 get { return legacy; }
67 BlockSizeValue = legacy ? 64 : 128;