src/test/test-random-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2017 Zbigniew Jędrzejewski-Szmek
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "hexdecoct.h"
  21 #include "random-util.h"
  22 #include "log.h"
  23
  24 static void test_acquire_random_bytes(bool high_quality_required) {
  25         uint8_t buf[16] = {};
  26         unsigned i;
  27
  28         log_info("/* %s */", __func__);
  29
  30         for (i = 1; i < sizeof buf; i++) {
  31                 assert_se(acquire_random_bytes(buf, i, high_quality_required) == 0);
  32                 if (i + 1 < sizeof buf)
  33                         assert_se(buf[i] == 0);
  34
  35                 hexdump(stdout, buf, i);
  36         }
  37 }
  38
  39 static void test_pseudorandom_bytes(void) {
  40         uint8_t buf[16] = {};
  41         unsigned i;
  42
  43         log_info("/* %s */", __func__);
  44
  45         for (i = 1; i < sizeof buf; i++) {
  46                 pseudorandom_bytes(buf, i);
  47                 if (i + 1 < sizeof buf)
  48                         assert_se(buf[i] == 0);
  49
  50                 hexdump(stdout, buf, i);
  51         }
  52 }
  53
  54 int main(int argc, char **argv) {
  55         log_set_max_level(LOG_DEBUG);
  56         log_parse_environment();
  57         log_open();
  58
  59         test_acquire_random_bytes(false);
  60         test_acquire_random_bytes(true);
  61
  62         test_pseudorandom_bytes();
  63
  64         return 0;
  65 }