tron@2186: /* $Id$ */
tron@2186: 
rubidium@10429: /** @file md5.h Functions to create MD5 checksums. */
belugas@6527: 
truelight@602: /*
truelight@602:   Copyright (C) 1999, 2002 Aladdin Enterprises.  All rights reserved.
truelight@602: 
truelight@602:   This software is provided 'as-is', without any express or implied
truelight@602:   warranty.  In no event will the authors be held liable for any damages
truelight@602:   arising from the use of this software.
truelight@602: 
truelight@602:   Permission is granted to anyone to use this software for any purpose,
truelight@602:   including commercial applications, and to alter it and redistribute it
truelight@602:   freely, subject to the following restrictions:
truelight@602: 
truelight@602:   1. The origin of this software must not be misrepresented; you must not
truelight@602:      claim that you wrote the original software. If you use this software
truelight@602:      in a product, an acknowledgment in the product documentation would be
truelight@602:      appreciated but is not required.
truelight@602:   2. Altered source versions must be plainly marked as such, and must not be
truelight@602:      misrepresented as being the original software.
truelight@602:   3. This notice may not be removed or altered from any source distribution.
truelight@602: 
truelight@602:   L. Peter Deutsch
truelight@602:   ghost@aladdin.com
truelight@602: 
truelight@602:  */
belugas@6527: 
truelight@602: /*
truelight@602:   Independent implementation of MD5 (RFC 1321).
truelight@602: 
truelight@602:   This code implements the MD5 Algorithm defined in RFC 1321, whose
truelight@602:   text is available at
skidd13@8629:   http://www.ietf.org/rfc/rfc1321.txt
truelight@602:   The code is derived from the text of the RFC, including the test suite
truelight@602:   (section A.5) but excluding the rest of Appendix A.  It does not include
truelight@602:   any code or documentation that is identified in the RFC as being
truelight@602:   copyrighted.
truelight@602: 
truelight@602:   The original and principal author of md5.h is L. Peter Deutsch
truelight@602:   <ghost@aladdin.com>.  Other authors are noted in the change history
truelight@602:   that follows (in reverse chronological order):
truelight@602: 
skidd13@8629:   2007-12-24 Changed to C++ and adapted to OpenTTD source
truelight@602:   2002-04-13 lpd Removed support for non-ANSI compilers; removed
skidd13@8629:              references to Ghostscript; clarified derivation from RFC 1321;
skidd13@8629:              now handles byte order either statically or dynamically.
truelight@602:   1999-11-04 lpd Edited comments slightly for automatic TOC extraction.
truelight@602:   1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5);
skidd13@8629:              added conditionalization for C++ compilation from Martin
skidd13@8629:              Purschke <purschke@bnl.gov>.
truelight@602:   1999-05-03 lpd Original version.
truelight@602:  */
truelight@602: 
Darkvater@2436: #ifndef MD5_INCLUDED
Darkvater@2436: #define MD5_INCLUDED
truelight@602: 
truelight@602: /*
truelight@602:  * This package supports both compile-time and run-time determination of CPU
truelight@602:  * byte order.  If ARCH_IS_BIG_ENDIAN is defined as 0, the code will be
truelight@602:  * compiled to run only on little-endian CPUs; if ARCH_IS_BIG_ENDIAN is
truelight@602:  * defined as non-zero, the code will be compiled to run only on big-endian
truelight@602:  * CPUs; if ARCH_IS_BIG_ENDIAN is not defined, the code will be compiled to
truelight@602:  * run on either big- or little-endian CPUs, but will run slightly less
truelight@602:  * efficiently on either one than if ARCH_IS_BIG_ENDIAN is defined.
truelight@602:  */
truelight@602: 
skidd13@8629: struct Md5 {
skidd13@8629: private:
skidd13@8629: 	uint32 count[2]; ///< message length in bits, lsw first
skidd13@8629: 	uint32 abcd[4];  ///< digest buffer
skidd13@8629: 	uint8 buf[64];   ///< accumulate block
truelight@602: 
skidd13@8629: 	void Process(const uint8 *data);
skidd13@8629: 
skidd13@8629: public:
skidd13@8629: 	Md5();
skidd13@8629: 	void Append(const void *data, const size_t nbytes);
skidd13@8629: 	void Finish(uint8 digest[16]);
rubidium@6574: };
truelight@602: 
Darkvater@2436: #endif /* MD5_INCLUDED */