md5.h

用Visual C++开发的联通短信平台

// MD5.h: interface for the MD5 class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_MD5_H__1AFCC50F_80B0_4B27_A278_B79318E3DA2F__INCLUDED_)
#define AFX_MD5_H__1AFCC50F_80B0_4B27_A278_B79318E3DA2F__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class MD5  
{
public:
	// methods for controlled operation:
	MD5              ();  // simple initializer
	void  update     (unsigned char *input, unsigned int input_length);
	void  finalize   ();

	// methods to acquire finalized result
	void raw_digest  ( unsigned char *buf);  // digest as a 16-byte binary array

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        (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, uint1 *src, uint4 length);
	static void memcpy    (uint1 *dest, 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 // !defined(AFX_MD5_H__1AFCC50F_80B0_4B27_A278_B79318E3DA2F__INCLUDED_)