src/md5.h

   1 /*
   2   Copyright (C) 1999 Aladdin Enterprises.  All rights reserved.
   3
   4   This software is provided 'as-is', without any express or implied
   5   warranty.  In no event will the authors be held liable for any damages
   6   arising from the use of this software.
   7
   8   Permission is granted to anyone to use this software for any purpose,
   9   including commercial applications, and to alter it and redistribute it
  10   freely, subject to the following restrictions:
  11
  12   1. The origin of this software must not be misrepresented; you must not
  13      claim that you wrote the original software. If you use this software
  14      in a product, an acknowledgment in the product documentation would be
  15      appreciated but is not required.
  16   2. Altered source versions must be plainly marked as such, and must not be
  17      misrepresented as being the original software.
  18   3. This notice may not be removed or altered from any source distribution.
  19
  20   L. Peter Deutsch
  21   ghost@aladdin.com
  22
  23  */
  24 /*
  25   Independent implementation of MD5 (RFC 1321).
  26
  27   This code implements the MD5 Algorithm defined in RFC 1321.
  28   It is derived directly from the text of the RFC and not from the
  29   reference implementation.
  30
  31   The original and principal author of md5.h is L. Peter Deutsch
  32   <ghost@aladdin.com>.  Other authors are noted in the change history
  33   that follows (in reverse chronological order):
  34
  35   1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
  36   1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
  37         added conditionalization for C++ compilation from Martin
  38         Purschke <purschke@bnl.gov>.
  39   1999-05-03 lpd Original version.
  40  */
  41
  42 #ifndef md5_INCLUDED
  43 #  define md5_INCLUDED
  44
  45 /*
  46  * This code has some adaptations for the Ghostscript environment, but it
  47  * will compile and run correctly in any environment with 8-bit chars and
  48  * 32-bit ints.  Specifically, it assumes that if the following are
  49  * defined, they have the same meaning as in Ghostscript: P1, P2, P3,
  50  * ARCH_IS_BIG_ENDIAN.
  51  */
  52
  53 typedef unsigned char md5_byte_t; /* 8-bit byte */
  54 typedef unsigned int md5_word_t; /* 32-bit word */
  55
  56 /* Define the state of the MD5 Algorithm. */
  57 typedef struct md5_state_s {
  58     md5_word_t count[2];        /* message length in bits, lsw first */
  59     md5_word_t abcd[4];         /* digest buffer */
  60     md5_byte_t buf[64];         /* accumulate block */
  61 } md5_state_t;
  62
  63 #ifdef __cplusplus
  64 extern "C"
  65 {
  66 #endif
  67
  68 /* Initialize the algorithm. */
  69 #ifdef P1
  70 void md5_init(P1(md5_state_t *pms));
  71 #else
  72 void md5_init(md5_state_t *pms);
  73 #endif
  74
  75 /* Append a string to the message. */
  76 #ifdef P3
  77 void md5_append(P3(md5_state_t *pms, const md5_byte_t *data, int nbytes));
  78 #else
  79 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
  80 #endif
  81
  82 /* Finish the message and return the digest. */
  83 #ifdef P2
  84 void md5_finish(P2(md5_state_t *pms, md5_byte_t digest[16]));
  85 #else
  86 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
  87 #endif
  88
  89 #ifdef __cplusplus
  90 }  /* end extern "C" */
  91 #endif
  92
  93 #endif /* md5_INCLUDED */