benchmark.c

来自「DES算法的C源码 benchmark.c des.c descalc.c」· C语言 代码 · 共 43 行

/* Just run DES in a loop consuming CPU time; good for benchmarking
 * Phil Karn
 */
#include <stdio.h>
main()
{
	char key[8],work[8];
	long iter,count;

	desinit(0);
	printf("Enter key: ");
	get8(key);
	printf("Setting key: "); put8(key); printf("\n");
	setkey(key);
	printf("Enter starting value: ");
	get8(work);
	printf("Starting value: "); put8(work); printf("\n");
	printf("Number of iterations: ");
	scanf("%ld",&count);

	for(iter = 0;iter < count; iter++)
		endes(work);
}
get8(cp)
char *cp;
{
	int i,t;

	for(i=0;i<8;i++){
		scanf("%2x",&t);
		*cp++ = t;
	}
}
put8(cp)
char *cp;
{
	int i;

	for(i=0;i<8;i++){
		printf("%2x ",*cp++ & 0xff);
	}
}