external/md5/md5.h

0001 /*
0002   Copyright (C) 1999, 2002 Aladdin Enterprises.  All rights reserved.
0003
0004   This software is provided 'as-is', without any express or implied
0005   warranty.  In no event will the authors be held liable for any damages
0006   arising from the use of this software.
0007
0008   Permission is granted to anyone to use this software for any purpose,
0009   including commercial applications, and to alter it and redistribute it
0010   freely, subject to the following restrictions:
0011
0012   1. The origin of this software must not be misrepresented; you must not
0013      claim that you wrote the original software. If you use this software
0014      in a product, an acknowledgment in the product documentation would be
0015      appreciated but is not required.
0016   2. Altered source versions must be plainly marked as such, and must not be
0017      misrepresented as being the original software.
0018   3. This notice may not be removed or altered from any source distribution.
0019
0020   L. Peter Deutsch
0021   ghost@aladdin.com
0022
0023  */
0024 /* $Id: md5.h,v 1.4 2002/04/13 19:20:28 lpd Exp $ */
0025 /*
0026   Independent implementation of MD5 (RFC 1321).
0027
0028   This code implements the MD5 Algorithm defined in RFC 1321, whose
0029   text is available at
0030     http://www.ietf.org/rfc/rfc1321.txt
0031   The code is derived from the text of the RFC, including the test suite
0032   (section A.5) but excluding the rest of Appendix A.  It does not include
0033   any code or documentation that is identified in the RFC as being
0034   copyrighted.
0035
0036   The original and principal author of md5.h is L. Peter Deutsch
0037   <ghost@aladdin.com>.  Other authors are noted in the change history
0038   that follows (in reverse chronological order):
0039
0040   2002-04-13 lpd Removed support for non-ANSI compilers; removed
0041     references to Ghostscript; clarified derivation from RFC 1321;
0042     now handles byte order either statically or dynamically.
0043   1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
0044   1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
0045     added conditionalization for C++ compilation from Martin
0046     Purschke <purschke@bnl.gov>.
0047   1999-05-03 lpd Original version.
0048  */
0049
0050 #ifndef md5_INCLUDED
0051 #  define md5_INCLUDED
0052
0053 /*
0054  * This package supports both compile-time and run-time determination of CPU
0055  * byte order.  If ARCH_IS_BIG_ENDIAN is defined as 0, the code will be
0056  * compiled to run only on little-endian CPUs; if ARCH_IS_BIG_ENDIAN is
0057  * defined as non-zero, the code will be compiled to run only on big-endian
0058  * CPUs; if ARCH_IS_BIG_ENDIAN is not defined, the code will be compiled to
0059  * run on either big- or little-endian CPUs, but will run slightly less
0060  * efficiently on either one than if ARCH_IS_BIG_ENDIAN is defined.
0061  */
0062
0063 typedef unsigned char md5_byte_t; /* 8-bit byte */
0064 typedef unsigned int md5_word_t; /* 32-bit word */
0065
0066 /* Define the state of the MD5 Algorithm. */
0067 typedef struct md5_state_s {
0068     md5_word_t count[2];    /* message length in bits, lsw first */
0069     md5_word_t abcd[4];     /* digest buffer */
0070     md5_byte_t buf[64];     /* accumulate block */
0071 } md5_state_t;
0072
0073 #ifdef __cplusplus
0074 extern "C"
0075 {
0076 #endif
0077
0078 /* Initialize the algorithm. */
0079 void md5_init(md5_state_t *pms);
0080
0081 /* Append a string to the message. */
0082 void md5_append(md5_state_t *pms, const md5_byte_t *data, int nbytes);
0083
0084 /* Finish the message and return the digest. */
0085 void md5_finish(md5_state_t *pms, md5_byte_t digest[16]);
0086
0087 #ifdef __cplusplus
0088 }  /* end extern "C" */
0089 #endif
0090
0091 #endif /* md5_INCLUDED */