md5.h
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上传日期:2015-11-01
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文件大小:4k
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P2P编程
开发平台:
Visual C++
- // MD5.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.
- */
- #ifndef _MD5_H__
- #define _MD5_H__
- class MD5 {
- public:
- // methods for controlled operation:
- MD5 (); // simple initializer
- void update (const unsigned char *input, unsigned int input_length);
- void update (FILE *file);
- void finalize ();
- // constructors for special circumstances. All these constructors finalize
- // the MD5 context.
- MD5 (const unsigned char *string, unsigned int len); // digest string, finalize
- MD5 (FILE *file); // digest file, close, finalize
- // methods to acquire finalized result
- unsigned char *raw_digest (); // digest as a 16-byte binary array
- char * hex_digest (); // digest as a 33-byte ascii-hex string
- private:
- // 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
- // 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, uint4 *src, uint4 length);
- static void decode (uint4 *dest, const uint1 *src, uint4 length);
- static void memcpy (uint1 *dest, const uint1 *src, uint4 length);
- static void memset (uint1 *start, uint1 val, uint4 length);
- static inline uint4 rotate_left (uint4 x, uint4 n);
- static inline uint4 F (uint4 x, uint4 y, uint4 z);
- static inline uint4 G (uint4 x, uint4 y, uint4 z);
- static inline uint4 H (uint4 x, uint4 y, uint4 z);
- static inline uint4 I (uint4 x, uint4 y, uint4 z);
- static inline void FF (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
- uint4 s, uint4 ac);
- static inline void GG (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
- uint4 s, uint4 ac);
- static inline void HH (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
- uint4 s, uint4 ac);
- static inline void II (uint4& a, uint4 b, uint4 c, uint4 d, uint4 x,
- uint4 s, uint4 ac);
- };
- #endif