60 lines
916 B
C
60 lines
916 B
C
|
#include "df.h"
|
||
|
|
#include "./lib_tea/tea.h"
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <time.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
uint64 p = 4611686018427402023,
|
||
|
|
a,b,
|
||
|
|
A,B,AB,BA,
|
||
|
|
g;
|
||
|
|
|
||
|
|
uint32_t k[4]; // for tea
|
||
|
|
//
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
g=generateur(p);
|
||
|
|
srand(getpid()^time(NULL));
|
||
|
|
|
||
|
|
for (int i = 0;i < 2; i++){
|
||
|
|
|
||
|
|
a = 2 + rand()%(p-3);
|
||
|
|
A=expm(g,a,p);
|
||
|
|
|
||
|
|
b = 2 + rand()%(p-3);
|
||
|
|
B = expm(g,b,p);
|
||
|
|
|
||
|
|
|
||
|
|
AB = expm(A,b,p);
|
||
|
|
|
||
|
|
BA = expm(B,a,p);
|
||
|
|
//printf("%lx %lx %lx %lx %lx %lx\n",a,b,A,B,AB,BA);
|
||
|
|
assert(AB == BA);
|
||
|
|
|
||
|
|
memcpy((void*)(k+2*i),(void*)&AB,sizeof(uint32_t)*2);
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("key for tea = (%x,%x,%x,%x)\n",k[0],k[1],k[2],k[3]);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
while(1){
|
||
|
|
uint32_t v[2]={0};
|
||
|
|
ssize_t nb_read = read(0,v,sizeof(v));
|
||
|
|
if (nb_read <= 0)
|
||
|
|
break;
|
||
|
|
encrypt_tea(v,k);
|
||
|
|
decrypt_tea(v,k);
|
||
|
|
write(1,v,sizeof(v));
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|