Copyright (C) 1999, 2002 Aladdin Enterprises. All rights reserved.
 This software is provided 'as-is', without any express or implied
 warranty. In no event will the authors be held liable for any damages
 arising from the use of this software.
 Permission is granted to anyone to use this software for any purpose,
 including commercial applications, and to alter it and redistribute it
 freely, subject to the following restrictions:
 1. The origin of this software must not be misrepresented; you must not
 claim that you wrote the original software. If you use this software
 in a product, an acknowledgment in the product documentation would be
 appreciated but is not required.
 2. Altered source versions must be plainly marked as such, and must not be
 misrepresented as being the original software.
 3. This notice may not be removed or altered from any source distribution.
 L. Peter Deutsch
 ghost@aladdin.com
 Independent implementation of MD5 (RFC 1321).
 This code implements the MD5 Algorithm defined in RFC 1321, whose
 text is available at
	http://www.ietf.org/rfc/rfc1321.txt
 The code is derived from the text of the RFC, including the test suite
 (section A.5) but excluding the rest of Appendix A. It does not include
 any code or documentation that is identified in the RFC as being
 copyrighted.
 The original and principal author of md5.h is L. Peter Deutsch
 <ghost@aladdin.com>. Other authors are noted in the change history
 that follows (in reverse chronological order):
 2002年04月13日 lpd Removed support for non-ANSI compilers; removed
	references to Ghostscript; clarified derivation from RFC 1321;
	now handles byte order either statically or dynamically.
 1999年11月04日 lpd Edited comments slightly for automatic TOC extraction.
 1999年10月18日 lpd Fixed typo in header comment (ansi2knr rather than md5);
	added conditionalization for C++ compilation from Martin
	Purschke <purschke@bnl.gov>.
 1999年05月03日 lpd Original version.