mirror of
https://github.com/Llewellynvdm/Tomb.git
synced 2024-11-20 03:30:59 +00:00
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <sys/time.h>
|
|
|
|
#include <gcrypt.h>
|
|
|
|
static long bench(int ic) {
|
|
char *pass = "mypass";
|
|
unsigned char *salt = "abcdefghijklmno";
|
|
int salt_len = strlen(salt);
|
|
int result_len = 64;
|
|
unsigned char *result = calloc(result_len, sizeof(char));
|
|
struct timeval start, end;
|
|
long microtime;
|
|
|
|
gettimeofday(&start, NULL);
|
|
gcry_kdf_derive( pass, strlen(pass), GCRY_KDF_PBKDF2, GCRY_MD_SHA1, salt, salt_len, ic, result_len, result);
|
|
gettimeofday(&end, NULL);
|
|
microtime = 1000000*end.tv_sec+end.tv_usec - (1000000*start.tv_sec+start.tv_usec);
|
|
|
|
return (long)microtime;
|
|
}
|
|
int main(int argc, char *argv[])
|
|
{
|
|
long desired_time = 1000000;
|
|
long microtime;
|
|
int ic=100;
|
|
int tries=0;
|
|
if(argc >= 2)
|
|
sscanf(argv[1], "%ld", &desired_time);
|
|
if (!gcry_check_version ("1.5.0")) {
|
|
fputs ("libgcrypt version mismatch\n", stderr);
|
|
exit (2);
|
|
}
|
|
/* Allocate a pool of 16k secure memory. This make the secure memory
|
|
available and also drops privileges where needed. */
|
|
gcry_control (GCRYCTL_INIT_SECMEM, 16384, 0);
|
|
/* It is now okay to let Libgcrypt complain when there was/is
|
|
a problem with the secure memory. */
|
|
gcry_control (GCRYCTL_RESUME_SECMEM_WARN);
|
|
/* Tell Libgcrypt that initialization has completed. */
|
|
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
|
|
|
|
|
|
microtime = bench(ic);
|
|
while( abs(desired_time-microtime) > (desired_time/10) /*little difference */
|
|
&& tries++ <= 5) {
|
|
float ratio = (float)desired_time/microtime;
|
|
if(ratio > 1000) ratio=1000.0;
|
|
ic*=ratio;
|
|
if(ic<1) ic=1;
|
|
microtime = bench(ic);
|
|
}
|
|
printf("%d\n", ic);
|
|
return 0;
|
|
|
|
}
|