// print a hex value as binary
void printhexasbin(unsigned char *hex)
{
unsigned int length;
length= hextobinarray(TmpBits,hex);
printbinarray(TmpBits, length);
}
int main(int argc, char** argv) {
/*Delclaraciones*/
unsigned short n=-1,i;
unsigned char *a,*b,*amasb,*fa,*fb,*famasb,*faux;
/*Argumentos de entrada*/
if(argc!=3){
printf("El programa se debe ejecutar como linealidadSBoxesDES -n N , siendo N el numero de iteraciones que se desean\n");
return EXIT_FAILURE;
}
n=atoi(argv[2]);
if(n<=0)return EXIT_FAILURE;
/*Memoria*/
a=(unsigned char *)malloc(6*sizeof(unsigned char));
if(!a) return EXIT_FAILURE;
b=(unsigned char *)malloc(6*sizeof(unsigned char));
if(!b) {
if(a)free(a);
return EXIT_FAILURE;
}
amasb=(unsigned char *)malloc(6*sizeof(unsigned char));
if(!amasb){
if(a)free(a);
if(b)free(b);
return EXIT_FAILURE;
}
fa=(unsigned char *)malloc(4*sizeof(unsigned char));
if(!fa) {
if(amasb)free(amasb);
if(a)free(a);
if(b)free(b);
return EXIT_FAILURE;
}
fb=(unsigned char *)malloc(4*sizeof(unsigned char));
if(!fb) {
if(fa)free(fa);
if(amasb)free(amasb);
if(a)free(a);
if(b)free(b);
return EXIT_FAILURE;
}
famasb=(unsigned char *)malloc(4*sizeof(unsigned char));
if(!famasb){
if(fb)free(fb);
if(fa)free(fa);
if(amasb)free(amasb);
if(a)free(a);
if(b)free(b);
return EXIT_FAILURE;
}
faux=(unsigned char *)malloc(4*sizeof(unsigned char));
if(!faux){
if(famasb)free(famasb);
if(fb)free(fb);
if(fa)free(fa);
if(amasb)free(amasb);
if(a)free(a);
if(b)free(b);
return EXIT_FAILURE;
}
/*Iteramos*/
srand(time(NULL));
for(i=0;i<n;i++){
memset(a,0,6);
memset(b,0,6);
memset(amasb,0,6);
memset(fa,0,4);
memset(fb,0,4);
memset(famasb,0,4);
memset(faux,0,4);
printf("ITERACION %d:\n",i+1);
generaBloque(a,6);
cajaSfun(a,fa);
generaBloque(b,6);
cajaSfun(b,fb);
XORtam(a,b,6,amasb);
cajaSfun(amasb,famasb);
XORtam(fa,fb,4,faux);
printf("f(a):");
printbinarray(fa,4);
printf("f(b):");
printbinarray(fb,4);
printf("f(a+b):");
printbinarray(famasb,4);
printf("f(a)+f(b):");
printbinarray(faux,4);
}
/*Liberar memoria reservada al salir*/
if(faux)free(faux);
if(famasb)free(famasb);
if(fb)free(fb);
if(fa)free(fa);
if(amasb)free(amasb);
if(a)free(a);
if(b)free(b);
}
