2 * PBKDF performance check
3 * Copyright (C) 2012, Red Hat, Inc. All rights reserved.
5 * This file is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This file is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this file; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <sys/resource.h>
23 #include "crypto_backend.h"
25 static long time_ms(struct rusage *start, struct rusage *end)
29 ms = (end->ru_utime.tv_sec - start->ru_utime.tv_sec) * 1000;
30 ms += (end->ru_utime.tv_usec - start->ru_utime.tv_usec) / 1000;
32 if (crypt_backend_flags() & CRYPT_BACKEND_KERNEL) {
33 ms += (end->ru_stime.tv_sec - start->ru_stime.tv_sec) * 1000;
34 ms += (end->ru_stime.tv_usec - start->ru_stime.tv_usec) / 1000;
40 /* This code benchmarks PBKDF and returns iterations/second using specified hash */
41 int crypt_pbkdf_check(const char *kdf, const char *hash,
42 const char *password, size_t password_size,
43 const char *salt, size_t salt_size,
46 struct rusage rstart, rend;
50 unsigned int iterations;
57 if (getrusage(RUSAGE_SELF, &rstart) < 0)
60 r = crypt_pbkdf(kdf, hash, password, password_size, salt,
61 salt_size, &buf, 1, iterations);
65 if (getrusage(RUSAGE_SELF, &rend) < 0)
68 ms = time_ms(&rstart, &rend);
81 if (++step > 10 || !iterations)
85 /* Safety check if anything went wrong */
90 *iter_secs = (iterations * 1000) / ms;