md5.h

   1 /* md5.h
   2  *
   3  * The md5 hash function.
   4  */
   5
   6 /* nettle, low-level cryptographics library
   7  *
   8  * Copyright (C) 2001 Niels Möller
   9  *
  10  * The nettle library is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or (at your
  13  * option) any later version.
  14  *
  15  * The nettle library is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  17  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  18  * License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  22  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  23  * MA 02111-1307, USA.
  24  */
  25
  26 #ifndef NETTLE_MD5_H_INCLUDED
  27 #define NETTLE_MD5_H_INCLUDED
  28
  29 #include <inttypes.h>
  30
  31 #define MD5_DIGEST_SIZE 16
  32 #define MD5_DATA_SIZE 64
  33
  34 /* Digest is kept internally as 4 32-bit words. */
  35 #define _MD5_DIGEST_LENGTH 4
  36
  37 struct md5_ctx
  38 {
  39   uint32_t digest[_MD5_DIGEST_LENGTH];
  40   uint32_t count_l, count_h;    /* Block count */
  41   uint8_t block[MD5_DATA_SIZE]; /* Block buffer */
  42   unsigned index;               /* Into buffer */
  43 };
  44
  45 void
  46 md5_init(struct md5_ctx *ctx);
  47
  48 void
  49 md5_update(struct md5_ctx *ctx,
  50            unsigned length,
  51            const uint8_t *data);
  52
  53 void
  54 md5_digest(struct md5_ctx *ctx,
  55            unsigned length,
  56            uint8_t *digest);
  57
  58 #endif /* NETTLE_MD5_H_INCLUDED */