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Add tests to secure memcmp and memzero functions.

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Diadlo 2016-12-27 00:00:26 +03:00
parent 06a68f0f5f
commit b99e99f5d9
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1 changed files with 87 additions and 0 deletions
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87
auto_tests/crypto_test.c
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@ -2,7 +2,9 @@
#include "config.h"
#endif
#include "../toxcore/misc_tools.h"
#include "../toxcore/net_crypto.h"
#include <check.h>
#include <stdint.h>
#include <stdlib.h>
@ -323,6 +325,89 @@ START_TEST(test_increment_nonce)
}
END_TEST
START_TEST(test_memzero)
{
uint8_t src[sizeof(test_c)];
memcpy(src, test_c, sizeof(test_c));
crypto_memzero(src, sizeof(src));
size_t i;
for (i = 0; i < sizeof(src); i++) {
ck_assert_msg(src[i] == 0, "Memory is not zeroed");
}
}
END_TEST
#define CRYPTO_TEST_MEMCMP_SIZE 1024*32
#define CRYPTO_TEST_MEMCMP_COUNT 500
#define CRYPTO_TEST_MEMCMP_EPS 10
static make_quick_sort(clock_t)
static int cmp(clock_t a, clock_t b)
{
if (a < b) {
return -1;
}
if (a > b) {
return 1;
}
return 0;
}
static clock_t memcmp_time(void *a, void *b, size_t len)
{
clock_t start = clock();
crypto_memcmp(a, b, len);
return clock() - start;
}
static clock_t memcmp_median(void *a, void *b, size_t len)
{
size_t i;
clock_t results[CRYPTO_TEST_MEMCMP_COUNT];
for (i = 0; i < CRYPTO_TEST_MEMCMP_COUNT; i++) {
results[i] = memcmp_time(a, b, len);
}
clock_t_quick_sort(results, CRYPTO_TEST_MEMCMP_COUNT, cmp);
return results[CRYPTO_TEST_MEMCMP_COUNT / 2];
}
START_TEST(test_memcmp)
{
uint8_t src[CRYPTO_TEST_MEMCMP_SIZE];
rand_bytes(src, sizeof(src));
uint8_t same[sizeof(src)];
memcpy(same, src, sizeof(src));
uint8_t not_same[sizeof(src)];
rand_bytes(not_same, sizeof(not_same));
clock_t same_median = memcmp_median(src, same, sizeof(src));
clock_t not_same_median = memcmp_median(src, not_same, sizeof(src));
clock_t delta;
if (same_median > not_same_median) {
delta = same_median - not_same_median;
} else {
delta = not_same_median - same_median;
}
ck_assert_msg(delta < CRYPTO_TEST_MEMCMP_EPS,
"Delta time is too long (%d >= %d)\n"
"Time of the same data comparation: %d\n"
"Time of the different data comparation: %d",
delta, CRYPTO_TEST_MEMCMP_EPS, same_median, not_same_median);
}
END_TEST
static Suite *crypto_suite(void)
{
Suite *s = suite_create("Crypto");
@ -333,6 +418,8 @@ static Suite *crypto_suite(void)
DEFTESTCASE(large_data);
DEFTESTCASE(large_data_symmetric);
DEFTESTCASE_SLOW(increment_nonce, 20);
DEFTESTCASE(memzero);
DEFTESTCASE(memcmp);
return s;
}