des.h

本代码是一个完整的DES算法源代码

#ifndef __Y_DES_H__
#define __Y_DES_H__


extern void DoFirstChange(unsigned char *s);
extern void DoKey(unsigned char *s,
           unsigned char *C,
           unsigned char *D);
           
extern void DoLeft(unsigned char *s, short n);
extern void DoRight(unsigned char *s, short n);
extern void SetKey(short encrypt,
            unsigned char *C,
            unsigned char *D,
            short n,
            unsigned char *K);
            
extern void E_expand(unsigned char * s, unsigned char * r);
extern void P_chang(unsigned char * s);

extern unsigned char Find_S(unsigned char * s, short ns);

extern void f_fun(unsigned char *R,
           unsigned char *K,
           unsigned char *m);
extern void DesEncrypt(short encrypt, char* datat, char* keyt);
#endif