des3.txt

这是问同学要的

Des.h:

/************************************************************************/
/* Des.h :            Interface of class Des                            */
/*                      Used For DES Encrypt                            */
/*                                                          Ahui Wang   */
/*                                                          Nankai U.   */
/*                                                          2006-9-14   */
/************************************************************************/

#if !defined(AFX_DES_H__34F60569_E4DE_4366_8858_4E9DCF5D8F00__INCLUDED_)
#define AFX_DES_H__34F60569_E4DE_4366_8858_4E9DCF5D8F00__INCLUDED_

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

＃include "memory.h"
/************************************************************************/
/*                Type Definitions                                      */
/************************************************************************/
typedef char BYTE;
typedef unsigned char BOOL;
typedef unsigned char BIT;

/************************************************************************/
/*                Const Definitions:                                    */
/************************************************************************/
//BOOL:
#define TRUE 0x01
#define FALSE 0x00

//Encrypt MODE :
#define ECB 0x01
#define CBC 0x02
#define CFB 0x04
#define OFB 0x08

/************************************************************************/
/*                        Class   Des                                   */
/************************************************************************/
class Des  
{
public:
 //constructions and destructions
 Des();
 Des(const char key[8]);
 virtual ~Des();
public: 
 //one group Encrypt and Decrypt:
 BOOL Encrypt(const char Plaintext[8],char Ciphertext[8]);
 BOOL Decrypt(const char Ciphertext[8],char Plaintext[8]);
 
 //DES Encrypt and Decrypt in mode ECB
 BOOL ECB_Encrypt(const char* Plaintext,char* Ciphertext,const long length);
 BOOL ECB_Decrypt(const char* Ciphertext,char* Plaintext,const long length);
 
 //DES Encrypt and Decrypt in mode CBC
 BOOL CBC_Encrypt(const char IV[8],const char* Plaintext,char* Ciphertext,const long length);
 BOOL CBC_Decrypt(const char IV[8],const char* Ciphertext,char* Plaintext,const long length);
 
 //DES Encrypt and Decrypt in mode CFB
 BOOL CFB_Encrypt(const char IV[8],const char* Plaintext,char* Ciphertext,const long length);
 BOOL CFB_Decrypt(const char IV[8],const char* Ciphertext,char* Plaintext,const long length);
 
 //DES Encrypt and Decrypt in mode OFB
 BOOL OFB_Encrypt(const char IV[8],const char* Plaintext,char* Ciphertext,const long length);
 BOOL OFB_Decrypt(const char IV[8],const char* Ciphertext,char* Plaintext,const long length);

public:
 //Adapted DES: three turn DES Encrypt and Decrypt
 void SetKey(const char key[8]); //Set Private SubKey
 BOOL Three_Encrypt(const char* Plaintext,char* Ciphertext,const long length,
      const char key[16],const char IV[8]="",const BYTE MODE=OFB);
 BOOL Three_Decrypt(const char* Ciphertext,char* Plaintext,const long length,
      const char key[16],const char IV[8]="",const BYTE MODE=OFB);
public:
 //Adapted DES: independet sub key DES Encrypt and Decrypt
 void CopySubKey(const char key[16*6]); //Copy a 16*48 bits key as Private Subkey
 BOOL Subkey_Encrypt(const char* Plaintext,char* Ciphertext,const long length,
      const char key[16*6],const char IV[8]="",const BYTE MODE=OFB);
 BOOL Subkey_Decrypt(const char* Ciphertext,char* Plaintext,const long length,
      const char key[16*6],const char IV[8]="",const BYTE MODE=OFB);
private:
 BIT SubKey[16][48];//16*48 Bits sub key
};

#endif // !defined(AFX_DES_H__34F60569_E4DE_4366_8858_4E9DCF5D8F00__INCLUDED_)


Des.cpp

/************************************************************************/
/* Des.cpp:                                                             */ 
/*          DES Basic Functions and class Des Member Functions          */
/*                                                           Ahui Wang  */
/*                                                           Nankai U.  */
/*                                                           2006-9-14  */
/************************************************************************/
＃include "Des.h"

/************************************************************************/
/*                       DES     Tables                                 */
/************************************************************************/
const static char IP_Table[64] = {
  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
};
const static char IPR_Table[64] = {
  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
};
static const char E_Table[48] = {
  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
};
const static char P_Table[32] = {
  16, 7, 20, 21, 29, 12, 28, 17, 1,  15, 23, 26, 5,  18, 31, 10,
  2,  8, 24, 14, 32, 27, 3,  9,  19, 13, 30, 6,  22, 11, 4,  25
};
const static char PC1_Table[56] = {
 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
};
const static char PC2_Table[48] = {
 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
};
const static char LOOP_Table[16] = { /*Used for Generate Sub Keys*/
 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1
};

/************************************************************************/
/*                    DES S Box                                         */
/************************************************************************/
const static char S_Box[8][4][16] = {
 // 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, 12,  4,  1,  7, 10, 11,  6,  8,  5,  3, 15, 13,  0, 14,  9,
 14, 11,  2, 12,  4,  7, 13,  1,  5,  0, 15, 10,  3,  9,  8,  6,
  4,  2,  1, 11, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14,
    11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3,
 // S6 
    12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11,
 10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8,
  9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6,
     4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13,
 // S7 
     4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1,
 13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6,
  1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2,
     6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12,
 // S8 
    13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7,
  1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2,
  7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8,
     2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11
};

/***********************************************************************
*                  Interface of DES  Basic Functions                   *
***********************************************************************/
static void Xor(BIT* output,BIT *input_a,const BIT *input_b,const short length);
static void Permute(BIT* output,const BIT *input,const short length,const char* table);
//Permute "input" to "output" according to the "table" 
static void SBoxPermute(BIT output[32],const BIT input[48]);
static void ByteToBit(BIT *output, const char *input, const short bits);
static void BitToByte(char *output, const BIT *input, const short bits);
static void RotateL(BIT *bit_buffer,const short length,BYTE loop);

static void F(BIT right[32],const BIT subkey[48]);


/************************************************************************/
/*             class Des: constructions and destructions                */
/************************************************************************/

Des::Des()
{

}

Des::Des(const char key[8])
{
 static BIT K[64], *KL=&K[0], *KR=&K[28];
    ByteToBit(K, key, 64);
    Permute(K, K, 56,PC1_Table);
    for(BYTE i=0; i<16; ++i) {
        RotateL(KL, 28, LOOP_Table[i]);
        RotateL(KR, 28, LOOP_Table[i]);
        Permute(SubKey[i], K, 48,PC2_Table);
    }
}

Des::~Des()
{

}


/**************************************************************************
*                      class Des:   operations                            *
**************************************************************************/
BOOL Des::Encrypt(const char Plaintext[8],char Ciphertext[8]){
 static BIT M[64], tmp[32], *L=&M[0], *R=&M[32];
 ByteToBit(M, Plaintext, 64);
    Permute(M, M, 64,IP_Table);
 for(BYTE i=0; i<16; ++i) {
  memcpy(tmp, R, 32);
  F(R, SubKey[i]);
        Xor(R, R, L, 32);
        memcpy(L, tmp, 32);
   }
 Permute(M, M, 64,IPR_Table);
    BitToByte(Ciphertext, M, 64);
 return TRUE;
}
BOOL Des::Decrypt(const char Ciphertext[8],char Plaintext[8]){
 static BIT M[64], tmp[32], *L=&M[0], *R=&M[32];
 ByteToBit(M, Ciphertext, 64);
    Permute(M, M, 64,IP_Table);
 for(BYTE i=15; i>=0; --i) {
  memcpy(tmp, L, 32);
        F(L, SubKey[i]);
        Xor(L,L, R, 32);
        memcpy(R, tmp, 32);
 }
 Permute(M, M, 64,IPR_Table);
    BitToByte(Plaintext, M, 64);
 return TRUE;
}
BOOL Des::ECB_Encrypt(const char* Plaintext,char* Ciphertext,const long length){
 char subset[8];
 for (long i=0;i<=(length>>3);i++) {  // length>>3 ==> length/8
  memcpy(subset,&Plaintext[i*8],8);
  Encrypt(subset,subset);
  memcpy(&Ciphertext[i*8],subset,8);
 }
 return TRUE;
}
BOOL Des::ECB_Decrypt(const char* Ciphertext,char* Plaintext,const long length){
 char subset[8];
 for (long i=0;i<=(length>>3);i++) {  // length>>3 ==> length/8
  memcpy(subset,&Ciphertext[i*8],8);
  Decrypt(subset,subset);
  memcpy(&Plaintext[i*8],subset,8);
 }
 return TRUE;
}
BOOL Des::CBC_Encrypt(const char IV[8],const char* Plaintext,char* Ciphertext,const long length){ 
 long i;
 BYTE j;
 char ptext[8],ctext[8];
 memcpy(ctext,IV,8);
 for (i=0;i<=(length>>3);i++) { // length>>3 ==> length/8
  memcpy(ptext,&Plaintext[i*8],8);
  for (j=0;j<8;j++) {
   ptext[j]^=ctext[j];
  }
  Encrypt(ptext,ctext);
  memcpy(&Ciphertext[i*8],ctext,8);
 }
 return TRUE;
}
BOOL Des::CBC_Decrypt(const char IV[8],const char* Ciphertext,char* Plaintext,const long length){
 char ctext[8],ptext[8];
 long i=(length>>3);  // length>>3 ==> length/8
 BYTE j;
 memcpy(ctext,&Ciphertext[i*8],8);
 for (i--;i>=-1;i--) {
  Decrypt(ctext,ptext);
  if (i==-1) {
   memcpy(ctext,IV,8);
  }
  else{
   memcpy(ctext,&Ciphertext[i*8],8);
  }
  for (j=0;j<8;j++) {
   ptext[j]^=ctext[j];
  }
  memcpy(&Plaintext[(i+1)*8],ptext,8);
 }
 return TRUE;
}

BOOL Des::CFB_Encrypt(const char IV[8],const char* Plaintext,char* Ciphertext,const long length){
 long i;
 BYTE j;
 char ptext[8],ctext[8];
 memcpy(ctext,IV,8);
 
 for (i=0;i<=(length>>3);i++) {  // length>>3 ==> length/8
  memcpy(ptext,&Plaintext[i*8],8);
  for (j=0;j<8;j++) {
   ctext[j]^=ptext[j];
  }
  memcpy(&Ciphertext[i*8],ctext,8);
  Encrypt(ctext,ctext);
 }
 return TRUE;
}
BOOL Des::CFB_Decrypt(const char IV[8],const char* Ciphertext,char* Plaintext,const long length){
 long i;
 BYTE j;
 char ptext[8],ctext[8];