class/corlib/System.Security.Cryptography/HMACSHA1.cs

   1 //
   2 // HMACSHA1.cs: Handles HMAC with SHA-1
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 //
  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:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  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
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System.IO;
  31 using System.Runtime.InteropServices;
  32
  33 using Mono.Security.Cryptography;
  34
  35 namespace System.Security.Cryptography {
  36
  37         // References:
  38         // a.   FIPS PUB 198: The Keyed-Hash Message Authentication Code (HMAC), 2002 March.
  39         //      http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf
  40         // b.   Internet RFC 2104, HMAC, Keyed-Hashing for Message Authentication
  41         //      (include C source for HMAC-MD5)
  42         //      http://www.ietf.org/rfc/rfc2104.txt
  43         // c.   IETF RFC2202: Test Cases for HMAC-MD5 and HMAC-SHA-1
  44         //      (include C source for HMAC-MD5 and HAMAC-SHA1)
  45         //      http://www.ietf.org/rfc/rfc2202.txt
  46         // d.   ANSI X9.71, Keyed Hash Message Authentication Code.
  47         //      not free :-(
  48         //      http://webstore.ansi.org/ansidocstore/product.asp?sku=ANSI+X9%2E71%2D2000
  49
  50         [ComVisible (true)]
  51         public class HMACSHA1 : HMAC {
  52
  53                 public HMACSHA1 ()
  54                         : this (KeyBuilder.Key (8))
  55                 {
  56                 }
  57
  58                 public HMACSHA1 (byte[] key)
  59                 {
  60                         HashName = "SHA1";
  61                         HashSizeValue = 160;
  62                         Key = key;
  63                 }
  64
  65                 public HMACSHA1 (byte[] key, bool useManagedSha1)
  66                 {
  67                         HashName = "System.Security.Cryptography.SHA1" + (useManagedSha1 ? "Managed" : "CryptoServiceProvider");
  68                         HashSizeValue = 160;
  69                         Key = key;
  70                 }
  71         }
  72 }