md5.h

绝对好使的Hash摘要算法

#ifndef _LGY_MD5_H
#define _LGY_MD5_H

/* MD5 Class. */
class MD5_CTX {
public:
	MD5_CTX();
	virtual ~MD5_CTX();
	void MD5Update ( unsigned char *input, unsigned int inputLen);//input为消息，inputLen为消息长度
	void MD5Final (unsigned char digest[16]);  //digest存放消息摘要

private:
	unsigned long int state[4];					/* state (ABCD) */
	unsigned long int count[2];					/* number of bits, modulo 2^64 (lsb first) */
	unsigned char buffer[64];       /* input buffer */
	unsigned char PADDING[64];		/* What? */

private:
	void MD5Init ();
	void MD5Transform (unsigned long int state[4], unsigned char block[64]);
	void MD5_memcpy (unsigned char* output, unsigned char* input,unsigned int len);
	void Encode (unsigned char *output, unsigned long int *input,unsigned int len);
	void Decode (unsigned long int *output, unsigned char *input, unsigned int len);
	void MD5_memset (unsigned char* output,int value,unsigned int len);
};

#endif