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include/gu_md5.h

00001 /*
00002   Copyright (C) 1999 Aladdin Enterprises.  All rights reserved.
00003 
00004   This software is provided 'as-is', without any express or implied
00005   warranty.  In no event will the authors be held liable for any damages
00006   arising from the use of this software.
00007 
00008   Permission is granted to anyone to use this software for any purpose,
00009   including commercial applications, and to alter it and redistribute it
00010   freely, subject to the following restrictions:
00011 
00012   1. The origin of this software must not be misrepresented; you must not
00013      claim that you wrote the original software. If you use this software
00014      in a product, an acknowledgment in the product documentation would be
00015      appreciated but is not required.
00016   2. Altered source versions must be plainly marked as such, and must not be
00017      misrepresented as being the original software.
00018   3. This notice may not be removed or altered from any source distribution.
00019 
00020   L. Peter Deutsch
00021   ghost@aladdin.com
00022 
00023  */
00024 /*
00025   This code implements the MD5 Algorithm defined in RFC 1321.
00026   It is derived directly from the text of the RFC and not from the
00027   reference implementation.
00028 
00029   The original and principal author of ansi2knr is L. Peter Deutsch
00030   <ghost@aladdin.com>.  Other authors are noted in the change history
00031   that follows (in reverse chronological order):
00032 
00033   1999-05-03 lpd Original version.
00034  */
00035 /*$Id: gu_md5.h,v 1.1 2002/01/11 18:22:36 chappell Exp $ */
00036 
00037 #ifndef md5_INCLUDED
00038 #  define md5_INCLUDED
00039 
00040 /*
00041  * This code has some adaptations for the Ghostscript environment, but it
00042  * will compile and run correctly in any environment with 8-bit chars and
00043  * 32-bit ints.  Specifically, it assumes that if the following are
00044  * defined, they have the same meaning as in Ghostscript: P1, P2, P3,
00045  * ARCH_IS_BIG_ENDIAN.
00046  */
00047 
00048 typedef unsigned char md5_byte_t; /* 8-bit byte */
00049 typedef unsigned int md5_word_t; /* 32-bit word */
00050 
00051 /* Define the state of the MD5 Algorithm. */
00052 typedef struct md5_state_s {
00053     md5_word_t count[2];        /* message length in bits, lsw first */
00054     md5_word_t abcd[4];         /* digest buffer */
00055     md5_byte_t buf[64];         /* accumulate block */
00056 } md5_state_t;
00057 
00058 /* Initialize the algorithm. */
00059 #ifdef P1
00060 void md5_init(P1(md5_state_t *pms));
00061 #else
00062 void md5_init(md5_state_t *pms);
00063 #endif
00064 
00065 /* Append a string to the message. */
00066 #ifdef P3
00067 void md5_append(P3(md5_state_t *pms, const md5_byte_t *data, int nbytes));
00068 #else
00069 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
00070 #endif
00071 
00072 /* Finish the message and return the digest. */
00073 #ifdef P2
00074 void md5_finish(P2(md5_state_t *pms, md5_byte_t digest[16]));
00075 #else
00076 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
00077 #endif
00078 
00079 #endif /* md5_INCLUDED */

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