DES 算法,出现错误：fatal error C1083: Cannot open include file: 'des_encode.h':
#include<stdio.h>
#include<string.h>
#include"des_encode.h"
int key[16][48];
char str[8];
void main()
{
EncodeMain();
}
void EncodeMain()
{
int i;
char keychar[8];
int key2[8];
int strkey[8];
printf("请输入8个要加密的字符：\n");
for(i=0;i<8;i++)
scanf("%c",&str[i]);
getchar();
for(i=0;i<8;i++)
strkey[i]=str[i];
printf("\n输入明文的十六进制为:\n");
for(i=0;i<8;i++)
printf("%10x",strkey[i]);
printf("\n请输入密钥(8个字符):\n");
for(i=0;i<8;i++)
scanf("%c",&keychar[i]);
for(i=0;i<8;i++)
key2[i]=keychar[i];
getchar();
Encode(strkey,key2);
printf("\n加密后十六进制密文是:\n");
for(i=0;i<8;i++)
printf("%10x",strkey[i]);
printf("\n\n请输入解密密码\n");
for(i=0;i<8;i++)
scanf("%c",&keychar[i]);
for(i=0;i<8;i++)
key2[i]=keychar[i];
Decode(strkey,key2);
for(i=0;i<8;i++)
printf("%10x",strkey[i]);
for(i=0;i<8;i++)
str[i]=strkey[i];
printf("\n明文为：\t");
for(i=0;i<8;i++)
printf("%c",str[i]);
printf("\n\n");
}
void keyBuild(int *keychar){
int i,j;
int movebit[]={1,1,2,2,2,2,2,2,
1,2,2,2,2,2,2,1};
int midkey2[56];
int midkey[64];
StrtoBin(midkey,keychar);
for(i=0;i<56;i++)
midkey2[i]=midkey[PC1[i]-1];
for(i=0;i<16;i++)
keyCreate(midkey2,movebit[i],i);
}
void StrtoBin(int *midkey,int *keychar){
int trans[8],i,j,k,n;
n=0;
for(i=0;i<8;i++){
j=0;
while(keychar[i]!=0){
trans[j]=keychar[i]%2;
keychar[i]=keychar[i]/2;
j++;
}
for(k=j;k<8;k++)trans[k]=0;
for(k=0;k<8;k++)
midkey[n++]=trans[7-k];
}
}
void keyCreate(int *midkey2,int movebit,int n){
int i,temp[4];
temp[0]=midkey2[0];
temp[1]=midkey2[1];
temp[2]=midkey2[28];
temp[3]=midkey2[29];
if(movebit==2){
for(i=0;i<26;i++){
midkey2[i]=midkey2[i+2];
midkey2[i+28]=midkey2[i+30];
}
midkey2[26]=temp[0];midkey2[27]=temp[1];
midkey2[54]=temp[2];midkey2[55]=temp[3]; }
else
{ for(i=0;i<27;i++){
midkey2[i]=midkey2[i+1];
midkey2[i+28]=midkey2[i+29];
}
midkey2[27]=temp[0];midkey2[55]=temp[2];
}
for(i=0;i<48;i++)
key[n][i]=midkey2[PC2[i]-1];
}
void EncodeData(int *lData,int *rData,int *str){
int i,j,temp[8],lint,rint;
int data[64];
lint=0,rint=0;
for(i=0;i<4;i++){
j=0;
while(str[i]!=0){
temp[j]=str[i]%2;
str[i]=str[i]/2;
j++;
}
while(j<8)temp[j++]=0;
for(j=0;j<8;j++)
lData[lint++]=temp[7-j];
j=0;
while(str[i+4]!=0){
temp[j]=str[i+4]%2;
str[i+4]=str[i+4]/2;
j++;
}
while(j<8)temp[j++]=0;
for(j=0;j<8;j++)rData[rint++]=temp[7-j];
}
for(i=0;i<32;i++){
data[i]=lData[i];
data[i+32]=rData[i];
}
for(i=0;i<32;i++){
lData[i]=data[IP1[i]-1];
rData[i]=data[IP1[i+32]-1];
}
}
void F(int *rData,int *key){
int i,rDataP[48];
Expand(rData,rDataP);
for(i=0;i<48;i++){
rDataP[i]=rDataP[i]^key[i];
}
ExchangeS(rDataP,rData);
ExchangeP(rData);
}
void Expand(int *rData,int *rDataP){
int i;
for(i=0;i<48;i++)
rDataP[i]=rData[Ex[i]-1];
}
void ExchangeS(int *rDataP,int *rData){
int i,n,linex,liney;
linex=liney=0;
for(i=0;i<48;i+=6){
n=i/6;
linex=(rDataP[i]<<1)+rDataP[i+5];
liney=(rDataP[i+1]<<3)+(rDataP[i+2]<<2)+(rDataP[i+3]<<1)+rDataP[i+4];
FillBin(rData,n,s[n][linex][liney]);
}
}
void ExchangeP(int *rData){
int i,temp[32];
for(i=0;i<32;i++)
temp[i]=rData[i];
for(i=0;i<32;i++)
rData[i]=temp[P[i]-1];
}
void FillBin(int *rData,int n,int s){
int temp[4],i;
for(i=0;i<4;i++){
temp[i]=s%2;
s=s/2;
}
for(i=0;i<4;i++)
rData[n*4+i]=temp[3-i];
}
void DecodeData(int *str,int *lData,int *rData){
int i;int a,b;int data[64];
a=0,b=0;
for(i=0;i<32;i++){
data[i]=lData[i];
data[i+32]=rData[i];
}
for(i=0;i<32;i++){
lData[i]=data[IP2[i]-1];
rData[i]=data[IP2[i+32]-1];
}
for(i=0;i<32;i++){
a=(lData[i]&0x1)+(a<<1);
b=(rData[i]&0x1)+(b<<1);
if((i+1)%8==0){
str[i/8]=a;a=0;
str[i/8+4]=b;b=0;
}
}
}
void Encode(int *str,int *keychar){
int lData[32],rData[32],temp[32],rDataP[48];
int i,j;
keyBuild(keychar);
EncodeData(lData,rData,str);
for(i=0;i<16;i++){
for(j=0;j<32;j++)
temp[j]=rData[j];
F(rData,key[i]);
for(j=0;j<32;j++){
rData[j]=rData[j]^lData[j];
}
for(j=0;j<32;j++)
lData[j]=temp[j];
}
DecodeData(str,rData,lData);
}
void Decode(int *str,int *keychar){
int lData[32],rData[32],temp[32],rDataP[48];
int i,j;
keyBuild(keychar);
EncodeData(lData,rData,str);
for(i=0;i<16;i++){
for(j=0;j<32;j++)
temp[j]=rData[j];
F(rData,key[15-i]);
for(j=0;j<32;j++){
rData[j]=rData[j]^lData[j];
}
for(j=0;j<32;j++){
lData[j]=temp[j];
}
}
DecodeData(str,rData,lData);
}
des_encode.h
void EncodeMain();
void DecodeMain();
void Decode(int *str,int *keychar);
void Encode(int *str,int *keychar);
void keyBuild(int *keychar);
void StrtoBin(int *midkey,int *keychar);
void keyCreate(int *midkey2,int movebit,int i);
void EncodeData(int *lData,int *rData,int *srt);
void F(int *rData,int *key);
void Expand(int *rData,int *rDataP);
void ExchangeS(int *rDataP,int *rData);
void ExchangeP(int *rData);
void FillBin(int *rData,int n,int s);
void DecodeData(int *str,int *lData,int *rData);
int IP1[]={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 IP2[]={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 s[][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},
{4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}
},
{
{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 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 P[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
};
};
[解决办法]
当前文件的同一目录没有'des_encode.h'这个文件
[解决办法]
找不到des_encode.h这个文件，察看一下你的搜索路径里面是否包含des_encode.h这个文件
