src/Logger/MD5.hpp

   1 /* Copyright_License {
   2
   3   XCSoar Glide Computer - http://www.xcsoar.org/
   4   Copyright (C) 2000-2013 The XCSoar Project
   5   A detailed list of copyright holders can be found in the file "AUTHORS".
   6
   7   This program is free software; you can redistribute it and/or
   8   modify it under the terms of the GNU General Public License
   9   as published by the Free Software Foundation; either version 2
  10   of the License, or (at your option) any later version.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with this program; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 }
  21 */
  22
  23 #ifndef MD5_HPP
  24 #define MD5_HPP
  25
  26 #include <stdint.h>
  27 #include <stddef.h>
  28
  29 class MD5
  30 {
  31 public:
  32   static constexpr size_t DIGEST_LENGTH = 32;
  33
  34 private:
  35   uint8_t buff512bits[64];
  36   uint32_t h0, h1, h2, h3;
  37   uint64_t message_length;
  38
  39   void Process512(const uint8_t *in);
  40
  41 public:
  42   /**
  43    * Initialise with the default key.
  44    */
  45   void InitKey();
  46
  47   /**
  48    * Initialise with a custom key.
  49    */
  50   void InitKey(uint32_t h0in, uint32_t h1in, uint32_t h2in, uint32_t h3in);
  51
  52   void Append(uint8_t ch);
  53   void Append(const void *data, size_t length);
  54
  55   void Finalize();
  56
  57   /**
  58    * @param buffer a buffer of at least #DIGEST_LENGTH+1 bytes
  59    */
  60   void GetDigest(char *buffer) const;
  61 };
  62
  63 #endif