Back to index

tetex-bin  3.0
md5.h
Go to the documentation of this file.
00001 /*
00002   Copyright (C) 1999, 2002 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 1.4 2002/04/13 19:20:28 lpd Exp $ */
00025 /*
00026   Independent implementation of MD5 (RFC 1321).
00027 
00028   This code implements the MD5 Algorithm defined in RFC 1321, whose
00029   text is available at
00030        http://www.ietf.org/rfc/rfc1321.txt
00031   The code is derived from the text of the RFC, including the test suite
00032   (section A.5) but excluding the rest of Appendix A.  It does not include
00033   any code or documentation that is identified in the RFC as being
00034   copyrighted.
00035 
00036   The original and principal author of md5.h is L. Peter Deutsch
00037   <ghost@aladdin.com>.  Other authors are noted in the change history
00038   that follows (in reverse chronological order):
00039 
00040   2002-04-13 lpd Removed support for non-ANSI compilers; removed
00041        references to Ghostscript; clarified derivation from RFC 1321;
00042        now handles byte order either statically or dynamically.
00043   1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
00044   1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
00045        added conditionalization for C++ compilation from Martin
00046        Purschke <purschke@bnl.gov>.
00047   1999-05-03 lpd Original version.
00048  */
00049 
00050 #ifndef md5_INCLUDED
00051 #  define md5_INCLUDED
00052 
00053 /*
00054  * This package supports both compile-time and run-time determination of CPU
00055  * byte order.  If ARCH_IS_BIG_ENDIAN is defined as 0, the code will be
00056  * compiled to run only on little-endian CPUs; if ARCH_IS_BIG_ENDIAN is
00057  * defined as non-zero, the code will be compiled to run only on big-endian
00058  * CPUs; if ARCH_IS_BIG_ENDIAN is not defined, the code will be compiled to
00059  * run on either big- or little-endian CPUs, but will run slightly less
00060  * efficiently on either one than if ARCH_IS_BIG_ENDIAN is defined.
00061  */
00062 
00063 typedef unsigned char md5_byte_t; /* 8-bit byte */
00064 typedef unsigned int md5_word_t; /* 32-bit word */
00065 
00066 /* Define the state of the MD5 Algorithm. */
00067 typedef struct md5_state_s {
00068     md5_word_t count[2];    /* message length in bits, lsw first */
00069     md5_word_t abcd[4];            /* digest buffer */
00070     md5_byte_t buf[64];            /* accumulate block */
00071 } md5_state_t;
00072 
00073 #ifdef __cplusplus
00074 extern "C" 
00075 {
00076 #endif
00077 
00078 /* Initialize the algorithm. */
00079 void md5_init(md5_state_t *pms);
00080 
00081 /* Append a string to the message. */
00082 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
00083 
00084 /* Finish the message and return the digest. */
00085 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
00086 
00087 #ifdef __cplusplus
00088 }  /* end extern "C" */
00089 #endif
00090 
00091 #endif /* md5_INCLUDED */