des.h

des和rsa加密算法程序

#ifndef _DES_H_
#define _DES_H_

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
  UINT4 subkeys[32];                                             /* subkeys */
  UINT4 iv[2];                                       /* initializing vector */
  UINT4 originalIV[2];                        /* for restarting the context */
  int encrypt;                                               /* encrypt flag */
} DES_CBC_CTX;

typedef struct {
  UINT4 subkeys[32];                                             /* subkeys */
  UINT4 iv[2];                                       /* initializing vector */
  UINT4 inputWhitener[2];                                 /* input whitener */
  UINT4 outputWhitener[2];                               /* output whitener */
  UINT4 originalIV[2];                        /* for restarting the context */
  int encrypt;                                              /* encrypt flag */
} DESX_CBC_CTX;

typedef struct {
  UINT4 subkeys[3][32];                     /* subkeys for three operations */
  UINT4 iv[2];                                       /* initializing vector */
  UINT4 originalIV[2];                        /* for restarting the context */
  int encrypt;                                              /* encrypt flag */
} DES3_CBC_CTX;

///////////////////////////////////////////////////////////////

void unscrunch PROTO_LIST ((unsigned char *, UINT4 *));
void scrunch PROTO_LIST ((UINT4 *, unsigned char *));
void deskey PROTO_LIST ((UINT4 *, unsigned char *, int));
static void cookey PROTO_LIST ((UINT4 *, UINT4 *, int));
void desfunc PROTO_LIST ((UINT4 *, UINT4 *));

//////////////////////////////////////////////////////

int DES(int encrypt,
		unsigned char * key,
		unsigned char *output,
		unsigned char *input,
		unsigned int len);

int DES3(int encrypt,
		unsigned char * key,
		unsigned char *output,
		unsigned char *input,
		unsigned int len);

void DES_CBCInit PROTO_LIST 
  ((DES_CBC_CTX *, unsigned char *, unsigned char *, int));
int DES_CBCUpdate PROTO_LIST
  ((DES_CBC_CTX *, unsigned char *, unsigned char *, unsigned int));
void DES_CBCRestart PROTO_LIST ((DES_CBC_CTX *));

void DESX_CBCInit PROTO_LIST
  ((DESX_CBC_CTX *, unsigned char *, unsigned char *, int));
int DESX_CBCUpdate PROTO_LIST
  ((DESX_CBC_CTX *, unsigned char *, unsigned char *, unsigned int));
void DESX_CBCRestart PROTO_LIST ((DESX_CBC_CTX *));

void DES3_CBCInit PROTO_LIST 
  ((DES3_CBC_CTX *, unsigned char *, unsigned char *, int));
int DES3_CBCUpdate PROTO_LIST
  ((DES3_CBC_CTX *, unsigned char *, unsigned char *, unsigned int));
void DES3_CBCRestart PROTO_LIST ((DES3_CBC_CTX *));

#ifdef __cplusplus
}
#endif
#endif /* _DES_H_ */