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Add multi-threaded unit test

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The unit test we add is designed to fail. The goal is to test the tests
and show that they catch the problem. A later commit will fix the unit
test and will make it pass.

Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath 2023-10-04 19:05:26 +01:00 committed by Paul Elliott
parent 9338cac050
commit a16ee6b7d4
2 changed files with 70 additions and 0 deletions
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6
tests/suites/test_suite_ctr_drbg.data
View File

@ -1096,5 +1096,11 @@ ctr_drbg_seed_file:"no_such_dir/file":MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR
CTR_DRBG Special Behaviours
ctr_drbg_special_behaviours:
CTR_DRBG Threads: no reseed
ctr_drbg_threads:"1fafa98bc83d95e10f2d5ed339a553e1":10000
CTR_DRBG Threads: reseed
ctr_drbg_threads:"0d2dda60286dc738ddcc2dd3520bb988":25
CTR_DRBG self test
ctr_drbg_selftest:

64
tests/suites/test_suite_ctr_drbg.function
View File

@ -90,6 +90,19 @@ exit:
mbedtls_ctr_drbg_free(&ctx);
}
static const int thread_random_reps = 10;
void *thread_random_function( void* ctx )
{
unsigned char out[16];
memset(out, 0, sizeof(out));
for(int i = 0; i < thread_random_reps; i++) {
TEST_EQUAL(mbedtls_ctr_drbg_random_with_add((mbedtls_ctr_drbg_context*) ctx, out, sizeof(out), NULL, 0), 0);
}
exit:
return NULL;
}
/* END_HEADER */
/* BEGIN_DEPENDENCIES
@ -325,6 +338,57 @@ exit:
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_THREADING_PTHREAD */
void ctr_drbg_threads(data_t *expected_result, int reseed_interval)
{
#define THREAD_CNT 5
pthread_t threads[THREAD_CNT];
unsigned char out[16];
memset(out, 0, sizeof(out));
unsigned char entropy[1024];
memset(entropy, 0, sizeof(entropy));
test_offset_idx = 0;
test_max_idx = sizeof(entropy);
mbedtls_ctr_drbg_context ctx;
mbedtls_ctr_drbg_init(&ctx);
mbedtls_ctr_drbg_set_reseed_interval(&ctx, reseed_interval);
/* There are too many calls in this test to conveniently provide enough
* entropy for this to be on. Test cases can trigger reseeding by setting
* \p reseed_interval appropriately. */
mbedtls_ctr_drbg_set_prediction_resistance(&ctx, MBEDTLS_CTR_DRBG_PR_OFF);
TEST_EQUAL(
mbedtls_ctr_drbg_seed(&ctx, mbedtls_test_entropy_func, entropy, NULL, 0),
0);
for (size_t i = 0; i < THREAD_CNT; i++) {
TEST_EQUAL(
pthread_create(&threads[i], NULL,
thread_random_function, (void*) &ctx),
0);
}
for (size_t i = 0; i < THREAD_CNT; i++) {
TEST_EQUAL(pthread_join(threads[i], NULL), 0);
}
/* Take a last output for comparing and thus verifying the DRBG state */
TEST_EQUAL(mbedtls_ctr_drbg_random(&ctx, out, sizeof(out)), 0);
TEST_MEMORY_COMPARE(out, sizeof(out), expected_result->x, expected_result->len);
exit:
mbedtls_ctr_drbg_free(&ctx);
}
#undef THREAD_CNT
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_FS_IO */
void ctr_drbg_seed_file(char *path, int ret)
{