📄 des002.cpp
字号:
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
//********************************************************************//
//************************* COMMON VARIABLES ***********************//
//********************************************************************//
int Key64[64]={0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1};
int Key56[56];
int row_out;
int PC1[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};
int C[28];
int D[28];
int PC2[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};
int Left_Shift_Table[16]={1,1,2,2,
2,2,2,2,
1,2,2,2,
2,2,2,1};
int CDmerge[56];
int Key[16][48]; //last Key,sum is 16,everyone is 48 bits.
//*********** Up is product 16 sub-keys used variables ***********//
//*********** Down is process Data used variables ***********//
int Data[64]={0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1,
0,0,1,1,0,0,0,1};
int IP[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};
int L[32];
int R[32];
int LL[32];
int RR[32];
int EX[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};
int EX_R[48];
int EX_L[48];
int B[8][6];
int S[8][4][16]={{{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}},
{{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}},
{{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}},
{{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}},
{{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}},
{{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},
{4,3,2,12,9,5,15,13,11,14,1,7,6,0,8,13}},
{{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}},
{{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}}};
int preBcP[32];
int preBcP_num;
int BcP[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};
int reverse_IP[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};
int temp_Data_Encrypt[64];
int DataEncrypt[64];
int temp_Data_Decrypt[64];
int DataDecrypt[64];
int judge=1; //judge Infomation for output to text
//********************************************************************//
//*********************** COMMON FUNCTION **************************//
//********************************************************************//
void Data_Out(int* data){
FILE *fp;
char c=' ';
fp=fopen("Data.txt","a+");
fprintf(fp,"%c%c",'\r','\n');
row_out=1;
for(int i=0;i<64;i++){
if(row_out<=8){
cout<<data[i]<<" ";
row_out++;
fprintf(fp,"%d%c",data[i],c);
}//if
else{
row_out=1;
i--;
cout<<endl;
fprintf(fp,"%c%c",'\r','\n');
}//else
}//for
cout<<endl;
fprintf(fp,"%c%c",'\r','\n');
char *info;
if(judge==1)
info="--------------------------Original Data";
else{
if(judge==2)
info="--------------------------Encrypt Data";
else
info="--------------------------Decrypt Data";
}//else
cout<<info<<endl;
fprintf(fp,"%s",info);
judge++;
fclose(fp);
}//Data_Out
//********************************************************************//
//*********************** SUB-KEY FUNCTION **************************//
//********************************************************************//
void PC1_Change(){
int num=0;
int pos;
for(int i=0;i<56;i++){
pos=PC1[i];
if(num<28){
C[num]=Key64[pos-1];
}//if
else{
D[num-28]=Key64[pos-1];
}//else
num++;
}//for
}//PC1_Change
void Left_Shift(int t){
int times=t;
int shift_times=Left_Shift_Table[times];
for(int i=0;i<shift_times;i++){
//Left-Shift C
int tempC=C[0];
for(int j=1;j<28;j++)
C[j-1]=C[j];
C[27]=tempC;
//Left-Shift D
int tempD=D[0];
for(j=1;j<28;j++)
D[j-1]=D[j];
D[27]=tempD;
}//for
}
void CD_merge(){
for(int i=0;i<28;i++)
CDmerge[i]=C[i];
for(i=0;i<28;i++)
CDmerge[28+i]=D[i];
}//CD_merge
void PC2_Change(int keynum){
int Key_num=keynum;
int pos;
for(int i=0;i<48;i++){
pos=PC2[i];
Key[Key_num][i]=CDmerge[pos-1];
}//for
}//PC2-Change
void Key_Product(){
PC1_Change();
for(int Keynum=0;Keynum<16;Keynum++){
Left_Shift(Keynum);
CD_merge();
PC2_Change(Keynum);
}//for
}//Key_Product
//********************************************************************//
//************ Data Encrypt And Decrypt FUNCTION ********************//
//********************************************************************//
void IP_Change(int* _data,int* Lp,int* Rp){
int pos;
for(int i=0;i<64;i++){
pos=IP[i];
if(i<32){
Lp[i]=_data[pos-1];
}//if
else{
Rp[i-32]=_data[pos-1];
}//else
}//for
}//IP_Change
void EX_Change(int* LorR,int* EX_LorR){
int pos;
for(int i=0;i<48;i++){
pos=EX[i];
EX_LorR[i]=LorR[pos-1];
}//for
}//EX_Change
void OP_Xor(int num,int* EX_LorR){
int tempnum=num;
for(int i=0;i<48;i++)
EX_LorR[i]=EX_LorR[i]^Key[tempnum][i];
}//OP_Xor
void GroupB(int* EX_LorR){
int num=0;
int Bnum=0;
for(int i=0;i<48;i++){
if(num<6){
B[Bnum][num]=EX_LorR[i];
num++;
}//if
else{
Bnum++;
num=0;
i--;
}//else
}//for
}//GroupB
int BtoDec(int* s,int num){
int ret=0;
if(num==2)
ret=s[num-1]+s[num-2]*2;
if(num==4)
ret=s[num-1]+s[num-2]*2+s[num-3]*4+s[num-4]*8;
return ret;
}//BtoDec
void DectoB(int s){
int temps=s;
int temp[4];
for(int i=0;i<4;i++){
temp[3-i]=temps%2;
temps=temps/2;
}//for
for(int j=0;j<4;j++){
preBcP[preBcP_num]=temp[j];
preBcP_num++;
}//for
}//DectoB
void S_Change(){
int row;
int column;
int row2[2];
int column4[4];
int Svalue;
preBcP_num=0;
for(int i=0;i<8;i++){
//get rwo2
row2[0]=B[i][0];
row2[1]=B[i][5];
//get column4
for(int j=0;j<4;j++)
column4[j]=B[i][j+1];
//convert B(data) to Dec(data)
row=BtoDec(row2,2);
column=BtoDec(column4,4);
//get the value in S[8][4][16] that correspond to B[8][6]
Svalue=S[i][row][column];
//convert Dec(data) to B(data) and
//save to preBcP[32]
DectoB(Svalue);
}//for
}//S_Change
void BcP_Change(int* LorR){
int pos;
for(int i=0;i<32;i++){
pos=BcP[i];
LorR[i]=preBcP[pos-1];
}//for
}//BcP_Change
void Last_Xor(int* Lq,int* Rq){
for(int i=0;i<32;i++)
Rq[i]=Rq[i]^Lq[i];
}//Last_Xor
void RLLmerge(){
for(int i=0;i<32;i++)
temp_Data_Encrypt[i]=R[i];
for(i=0;i<32;i++)
temp_Data_Encrypt[i+32]=LL[i];
}//RLLmerge
void reverseIP_Change(){
int pos;
for(int i=0;i<64;i++){
pos=reverse_IP[i];
DataEncrypt[i]=temp_Data_Encrypt[pos-1];
}//for
}//reverseIP_Change
void Data_Encrypt(){
IP_Change(Data,L,R);
for(int i=0;i<16;i++){
for(int j=0;j<32;j++)
LL[j]=R[j];
EX_Change(R,EX_R);
OP_Xor(i,EX_R);
GroupB(EX_R);
S_Change();
BcP_Change(R);
Last_Xor(L,R);
for(int k=0;k<32;k++)
L[k]=LL[k];
}//for
//Last Change result is : R[32] and LL[32]
RLLmerge();
reverseIP_Change();
// Data_Encrypt_Out();
}//Data_Encrypt
//***********************************************************************//
//********************** Data_Decrypt FUNCTION ********************//
//***********************************************************************//
void LRRmerge(){
for(int i=0;i<32;i++)
temp_Data_Decrypt[i]=L[i];
for(i=0;i<32;i++)
temp_Data_Decrypt[i+32]=RR[i];
}//LRRmerge
void De_reverseIP_Change(){
int pos;
for(int i=0;i<64;i++){
pos=reverse_IP[i];
DataDecrypt[i]=temp_Data_Decrypt[pos-1];
}//for
}//De_reverseIP_Change
void Data_Decrypt(){
IP_Change(DataEncrypt,R,L);
for(int i=16;i>0;i--){
for(int j=0;j<32;j++)
RR[j]=L[j];
EX_Change(L,EX_L);
OP_Xor(i-1,EX_L);
GroupB(EX_L);
S_Change();
BcP_Change(L);
Last_Xor(R,L);
for(int k=0;k<32;k++)
R[k]=RR[k];
}//for
//Last Change result is : L[32] and RR[32]
LRRmerge();
De_reverseIP_Change();
}//Data_Decrypt
void main()
{
clrscr();
Key_Product();
Data_Out(Data);
Data_Encrypt();
Data_Out(DataEncrypt);
Data_Decrypt();
Data_Out(DataDecrypt);
getch();
}⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -