src/test/test-random-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2017 Zbigniew Jędrzejewski-Szmek
   6 ***/
   7
   8 #include "hexdecoct.h"
   9 #include "random-util.h"
  10 #include "log.h"
  11
  12 static void test_acquire_random_bytes(bool high_quality_required) {
  13         uint8_t buf[16] = {};
  14         unsigned i;
  15
  16         log_info("/* %s */", __func__);
  17
  18         for (i = 1; i < sizeof buf; i++) {
  19                 assert_se(acquire_random_bytes(buf, i, high_quality_required) == 0);
  20                 if (i + 1 < sizeof buf)
  21                         assert_se(buf[i] == 0);
  22
  23                 hexdump(stdout, buf, i);
  24         }
  25 }
  26
  27 static void test_pseudorandom_bytes(void) {
  28         uint8_t buf[16] = {};
  29         unsigned i;
  30
  31         log_info("/* %s */", __func__);
  32
  33         for (i = 1; i < sizeof buf; i++) {
  34                 pseudorandom_bytes(buf, i);
  35                 if (i + 1 < sizeof buf)
  36                         assert_se(buf[i] == 0);
  37
  38                 hexdump(stdout, buf, i);
  39         }
  40 }
  41
  42 int main(int argc, char **argv) {
  43         log_set_max_level(LOG_DEBUG);
  44         log_parse_environment();
  45         log_open();
  46
  47         test_acquire_random_bytes(false);
  48         test_acquire_random_bytes(true);
  49
  50         test_pseudorandom_bytes();
  51
  52         return 0;
  53 }