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

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