llmd5.h
上传用户:king477883
上传日期:2021-03-01
资源大小:9553k
文件大小:5k
- /**
- * @file llmd5.h
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLMD5_H
- #define LL_LLMD5_H
- // LLMD5.CC - source code for the C++/object oriented translation and
- // modification of MD5.
- // Translation and modification (c) 1995 by Mordechai T. Abzug
- // This translation/ modification is provided "as is," without express or
- // implied warranty of any kind.
- // The translator/ modifier does not claim (1) that MD5 will do what you think
- // it does; (2) that this translation/ modification is accurate; or (3) that
- // this software is "merchantible." (Language for this disclaimer partially
- // copied from the disclaimer below).
- /* based on:
- MD5.H - header file for MD5C.C
- MDDRIVER.C - test driver for MD2, MD4 and MD5
- Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
- rights reserved.
- License to copy and use this software is granted provided that it
- is identified as the "RSA Data Security, Inc. MD5 Message-Digest
- Algorithm" in all material mentioning or referencing this software
- or this function.
- License is also granted to make and use derivative works provided
- that such works are identified as "derived from the RSA Data
- Security, Inc. MD5 Message-Digest Algorithm" in all material
- mentioning or referencing the derived work.
- RSA Data Security, Inc. makes no representations concerning either
- the merchantability of this software or the suitability of this
- software for any particular purpose. It is provided "as is"
- without express or implied warranty of any kind.
- These notices must be retained in any copies of any part of this
- documentation and/or software.
- */
- // use for the raw digest output
- const int MD5RAW_BYTES = 16;
- // use for outputting hex digests
- const int MD5HEX_STR_SIZE = 33; // char hex[MD5HEX_STR_SIZE]; with null
- const int MD5HEX_STR_BYTES = 32; // message system fixed size
- class LL_COMMON_API LLMD5 {
- // first, some types:
- typedef unsigned int uint4; // assumes integer is 4 words long
- typedef unsigned short int uint2; // assumes short integer is 2 words long
- typedef unsigned char uint1; // assumes char is 1 word long
- // how many bytes to grab at a time when checking files
- static const int BLOCK_LEN;
- public:
- // methods for controlled operation:
- LLMD5 (); // simple initializer
- void update (const uint1 *input, const uint4 input_length);
- void update (std::istream& stream);
- void update (FILE *file);
- void finalize ();
- // constructors for special circumstances. All these constructors finalize
- // the MD5 context.
- LLMD5 (const unsigned char *string); // digest string, finalize
- LLMD5 (std::istream& stream); // digest stream, finalize
- LLMD5 (FILE *file); // digest file, close, finalize
- LLMD5 (const unsigned char *string, const unsigned int number);
-
- // methods to acquire finalized result
- void raw_digest(unsigned char *array); // provide 16-byte array for binary data
- void hex_digest(char *string); // provide 33-byte array for ascii-hex string
- friend std::ostream& operator<< (std::ostream&, LLMD5 context);
- private:
- // next, the private data:
- uint4 state[4];
- uint4 count[2]; // number of *bits*, mod 2^64
- uint1 buffer[64]; // input buffer
- uint1 digest[16];
- uint1 finalized;
- // last, the private methods, mostly static:
- void init (); // called by all constructors
- void transform (const uint1 *buffer); // does the real update work. Note
- // that length is implied to be 64.
- static void encode (uint1 *dest, const uint4 *src, const uint4 length);
- static void decode (uint4 *dest, const uint1 *src, const uint4 length);
- };
- #endif // LL_LLMD5_H