libmsn 4.2.1
/home/salem/libmsn/tags/libmsn-4.2/msn/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 /*$Id: md5.h,v 1.3 2002/10/11 06:49:22 jtownsend Exp $ */
00025 /*
00026   Independent implementation of MD5 (RFC 1321).
00027 
00028   This code implements the MD5 Algorithm defined in RFC 1321.
00029   It is derived directly from the text of the RFC and not from the
00030   reference implementation.
00031 
00032   The original and principal author of md5.h is L. Peter Deutsch
00033   <ghost@aladdin.com>.  Other authors are noted in the change history
00034   that follows (in reverse chronological order):
00035 
00036   1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
00037   1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
00038   added conditionalization for C++ compilation from Martin
00039   Purschke <purschke@bnl.gov>.
00040   1999-05-03 lpd Original version.
00041  */
00042 
00043 #ifndef md5_INCLUDED
00044 #  define md5_INCLUDED
00045 
00046 /*
00047  * This code has some adaptations for the Ghostscript environment, but it
00048  * will compile and run correctly in any environment with 8-bit chars and
00049  * 32-bit ints.  Specifically, it assumes that if the following are
00050  * defined, they have the same meaning as in Ghostscript: P1, P2, P3,
00051  * ARCH_IS_BIG_ENDIAN.
00052  */
00053 
00054 typedef unsigned char md5_byte_t; /* 8-bit byte */
00055 typedef unsigned int md5_word_t; /* 32-bit word */
00056 
00057 /* Define the state of the MD5 Algorithm. */
00058 typedef struct md5_state_s {
00059     md5_word_t count[2];    /* message length in bits, lsw first */
00060     md5_word_t abcd[4];     /* digest buffer */
00061     md5_byte_t buf[64];     /* accumulate block */
00062 } md5_state_t;
00063 
00064 #ifdef __cplusplus
00065 extern "C" 
00066 {
00067 #endif
00068 
00069 /* Initialize the algorithm. */
00070 #ifdef P1
00071 void md5_init(P1(md5_state_t *pms));
00072 #else
00073 void md5_init(md5_state_t *pms);
00074 #endif
00075 
00076 /* Append a string to the message. */
00077 #ifdef P3
00078 void md5_append(P3(md5_state_t *pms, const md5_byte_t *data, int nbytes));
00079 #else
00080 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
00081 #endif
00082 
00083 /* Finish the message and return the digest. */
00084 #ifdef P2
00085 void md5_finish(P2(md5_state_t *pms, md5_byte_t digest[16]));
00086 #else
00087 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
00088 #endif
00089 
00090 #ifdef __cplusplus
00091 }  /* end extern "C" */
00092 #endif
00093 
00094 #endif /* md5_INCLUDED */
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