[C语言]mac下3DES ECB加密

Des.h文件

[cpp]
#ifndef Des_h
#define Des_h

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

void DesEncrypt(unsigned char *key, unsigned char *data);
void DesDecrypt(unsigned char *key, unsigned char *data);

#ifdef __cplusplus
};
#endif /* __cplusplus */

#endif /* DesAlgo_h */

#ifndef Des_h
#define Des_h

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

void DesEncrypt(unsigned char *key, unsigned char *data);
void DesDecrypt(unsigned char *key, unsigned char *data);

#ifdef __cplusplus
};
#endif /* __cplusplus */

#endif /* DesAlgo_h */
Des.cpp文件

[cpp] view plaincopyprint?#include <stdio.h>
#include <memory.h>
#include "Des.h"

/************************************************************************
*        Tables defined in the Data Encryption Standard documents       *
************************************************************************/
static const char ip[] =                     /* Initial permutation IP */
{
   58, 50, 42, 34, 26, 18, 10, 2,
   60, 52, 44, 36, 28, 20, 12, 4,
   62, 54, 46, 38, 30, 22, 14, 6,
   64, 56, 48, 40, 32, 24, 16, 8,
   57, 49, 41, 33, 25, 17, 9, 1,
   59, 51, 43, 35, 27, 19, 11, 3,
   61, 53, 45, 37, 29, 21, 13, 5,
   63, 55, 47, 39, 31, 23, 15, 7
}; /* ip[] */

static const char fp[] =                     /* Final permutation IP^-1 */
{
   40, 8, 48, 16, 56, 24, 64, 32,
   39, 7, 47, 15, 55, 23, 63, 31,
   38, 6, 46, 14, 54, 22, 62, 30,
   37, 5, 45, 13, 53, 21, 61, 29,
   36, 4, 44, 12, 52, 20, 60, 28,
   35, 3, 43, 11, 51, 19, 59, 27,
   34, 2, 42, 10, 50, 18, 58, 26,
   33, 1, 41, 9, 49, 17, 57, 25
}; /* fp[] */

/*
   Expansion operation matrix
   This is for reference only; it is unused in the code
   as the F() function performs it implicitly for speed
*/
#ifdef notdef
static const char ei[] =
{
   32, 1, 2, 3, 4, 5,
    4, 5, 6, 7, 8, 9,
    8, 9, 10, 11, 12, 13,
   12, 13, 14, 15, 16, 17,
   16, 17, 18, 19, 20, 21,
   20, 21, 22, 23, 24, 25,
   24, 25, 26, 27, 28, 29,
   28, 29, 30, 31, 32, 1
};
#endif /* notdef */

static const char pc1[] =              /* Permuted choice table (key) */
{
   57, 49, 41, 33, 25, 17, 9,
    1, 58, 50, 42, 34, 26, 18,
   10, 2, 59, 51, 43, 35, 27,
   19, 11, 3, 60, 52, 44, 36,

   63, 55, 47, 39, 31, 23, 15,
    7, 62, 54, 46, 38, 30, 22,
   14, 6, 61, 53, 45, 37, 29,
   21, 13, 5, 28, 20, 12, 4
};

static const char totRot[] =           /* Number left rotations of pc1 */
{
   1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28
}; /* totRot[] */

static const char pc2[] =              /* Permuted choice key (table)   */
{
   14, 17, 11, 24, 1, 5,
    3, 28, 15, 6, 21, 10,
   23, 19, 12, 4, 26, 8,
   16, 7, 27, 20, 13, 2,
   41, 52, 31, 37, 47, 55,
   30, 40, 51, 45, 33, 48,
   44, 49, 39, 56, 34, 53,
   46, 42, 50, 36, 29, 32
}; /* pc2[] */

static const char si[8][64] =          /* The (in)famous S-boxes        */
{
   /* S1 */
   14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
    0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
    4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
   15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,

   /* S2 */
   15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
    3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
    0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
   13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,

   /* S3 */
   10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
   13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
   13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
    1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,

   /* S4 */
    7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
   13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
   10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
    3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,

   /* S5 */
    2,

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