?? descert.cpp
字號:
#include <stdio.h>
#include <stdlib.h>
#include "ndes.h"
void get8(char *cp)
{
int i,t;
for(i=0;i<8;i++){
scanf("%2x",&t);
if(feof(stdin))
break;
// exit(0);
*cp++ = t;
}
}
void put8(char *cp)
{
int i;
for(i=0;i<8;i++){
printf("%02x",*cp++ & 0xff);
}
printf("\n");
}
int main(void)
{
char key[8],plain[8],cipher[8],answer[8];
int i;
int test;
int fail;
int j=0;
desinit(0);
for(test=0;!feof(stdin);test++){
printf("input the key K:");
get8(key);
printf(" K: ");
put8(key);
setkey(key); //設置密鑰
printf("input the plain P:");
get8(plain);
printf(" P: "); put8(plain);
/*
print("input the answer C:");
get8(answer);
printf(" C: "); put8(answer);
*/
for(i=0;i<8;i++)
cipher[i] = plain[i];
endes(cipher); //加密
printf("cipher:\n");
put8(cipher);
printf("input the answer C:");
get8(answer);
printf(" C: ");
put8(answer);
for(i=0;i<8;i++)
if(cipher[i] != answer[i])
break;
fail = 0;
if(i != 8){
printf(" Encrypt FAIL");
printf("\n R: ");
put8(cipher);
fail++;
}
if(fail == 0)
printf(" Encrypt OK!\n");
dedes(cipher); //解密
for(i=0;i<8;i++)
if(cipher[i] != plain[i])
break;
if(i != 8){
printf(" Decrypt FAIL");
fail++;
}
if(fail == 0)
printf(" Decrypt OK");
printf("\n");
}
return 0;
}
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