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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 13:13:44 +01:00
Extract RNG tests into a new test module
test_crypto.c is pretty big; it wouldn't hurt to split it up some more before I start adding stuff to the PRNG tests.
This commit is contained in:
Nick Mathewson
parent
622a9a8a36
commit
3d3578ab41
@ -120,6 +120,7 @@ src_test_test_SOURCES += \
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src/test/test_controller_events.c \
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src/test/test_crypto.c \
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src/test/test_crypto_ope.c \
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src/test/test_crypto_rng.c \
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src/test/test_data.c \
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src/test/test_dir.c \
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src/test/test_dir_common.c \
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@ -866,6 +866,7 @@ struct testgroup_t testgroups[] = {
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{ "crypto/openssl/", crypto_openssl_tests },
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#endif
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{ "crypto/pem/", pem_tests },
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{ "crypto/rng/", crypto_rng_tests },
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{ "dir/", dir_tests },
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{ "dir/md/", microdesc_tests },
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{ "dir/voting/flags/", voting_flags_tests },
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@ -206,6 +206,7 @@ extern struct testcase_t controller_event_tests[];
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extern struct testcase_t controller_tests[];
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extern struct testcase_t crypto_ope_tests[];
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extern struct testcase_t crypto_openssl_tests[];
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extern struct testcase_t crypto_rng_tests[];
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extern struct testcase_t crypto_tests[];
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extern struct testcase_t dir_handle_get_tests[];
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extern struct testcase_t dir_tests[];
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@ -254,168 +254,6 @@ test_crypto_openssl_version(void *arg)
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;
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}
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/** Run unit tests for our random number generation function and its wrappers.
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*/
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static void
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test_crypto_rng(void *arg)
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{
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int i, j, allok;
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char data1[100], data2[100];
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double d;
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char *h=NULL;
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/* Try out RNG. */
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(void)arg;
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tt_assert(! crypto_seed_rng());
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crypto_rand(data1, 100);
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crypto_rand(data2, 100);
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tt_mem_op(data1,OP_NE, data2,100);
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allok = 1;
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for (i = 0; i < 100; ++i) {
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uint64_t big;
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char *host;
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j = crypto_rand_int(100);
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if (j < 0 || j >= 100)
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allok = 0;
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big = crypto_rand_uint64(UINT64_C(1)<<40);
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if (big >= (UINT64_C(1)<<40))
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allok = 0;
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big = crypto_rand_uint64(UINT64_C(5));
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if (big >= 5)
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allok = 0;
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d = crypto_rand_double();
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tt_assert(d >= 0);
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tt_assert(d < 1.0);
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host = crypto_random_hostname(3,8,"www.",".onion");
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if (strcmpstart(host,"www.") ||
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strcmpend(host,".onion") ||
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strlen(host) < 13 ||
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strlen(host) > 18)
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allok = 0;
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tor_free(host);
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}
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/* Make sure crypto_random_hostname clips its inputs properly. */
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h = crypto_random_hostname(20000, 9000, "www.", ".onion");
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tt_assert(! strcmpstart(h,"www."));
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tt_assert(! strcmpend(h,".onion"));
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tt_int_op(63+4+6, OP_EQ, strlen(h));
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tt_assert(allok);
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done:
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tor_free(h);
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}
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static void
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test_crypto_rng_range(void *arg)
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{
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int got_smallest = 0, got_largest = 0;
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int i;
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(void)arg;
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for (i = 0; i < 1000; ++i) {
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int x = crypto_rand_int_range(5,9);
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tt_int_op(x, OP_GE, 5);
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tt_int_op(x, OP_LT, 9);
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if (x == 5)
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got_smallest = 1;
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if (x == 8)
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got_largest = 1;
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}
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/* These fail with probability 1/10^603. */
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tt_assert(got_smallest);
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tt_assert(got_largest);
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got_smallest = got_largest = 0;
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const uint64_t ten_billion = 10 * ((uint64_t)1000000000000);
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for (i = 0; i < 1000; ++i) {
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uint64_t x = crypto_rand_uint64_range(ten_billion, ten_billion+10);
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tt_u64_op(x, OP_GE, ten_billion);
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tt_u64_op(x, OP_LT, ten_billion+10);
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if (x == ten_billion)
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got_smallest = 1;
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if (x == ten_billion+9)
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got_largest = 1;
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}
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tt_assert(got_smallest);
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tt_assert(got_largest);
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const time_t now = time(NULL);
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for (i = 0; i < 2000; ++i) {
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time_t x = crypto_rand_time_range(now, now+60);
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tt_i64_op(x, OP_GE, now);
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tt_i64_op(x, OP_LT, now+60);
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if (x == now)
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got_smallest = 1;
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if (x == now+59)
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got_largest = 1;
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}
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tt_assert(got_smallest);
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tt_assert(got_largest);
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done:
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;
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}
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static void
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test_crypto_rng_strongest(void *arg)
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{
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const char *how = arg;
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int broken = 0;
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if (how == NULL) {
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;
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} else if (!strcmp(how, "nosyscall")) {
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break_strongest_rng_syscall = 1;
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} else if (!strcmp(how, "nofallback")) {
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break_strongest_rng_fallback = 1;
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} else if (!strcmp(how, "broken")) {
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broken = break_strongest_rng_syscall = break_strongest_rng_fallback = 1;
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}
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#define N 128
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uint8_t combine_and[N];
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uint8_t combine_or[N];
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int i, j;
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memset(combine_and, 0xff, N);
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memset(combine_or, 0, N);
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for (i = 0; i < 100; ++i) { /* 2^-100 chances just don't happen. */
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uint8_t output[N];
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memset(output, 0, N);
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if (how == NULL) {
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/* this one can't fail. */
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crypto_strongest_rand(output, sizeof(output));
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} else {
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int r = crypto_strongest_rand_raw(output, sizeof(output));
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if (r == -1) {
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if (broken) {
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goto done; /* we're fine. */
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}
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/* This function is allowed to break, but only if it always breaks. */
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tt_int_op(i, OP_EQ, 0);
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tt_skip();
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} else {
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tt_assert(! broken);
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}
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}
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for (j = 0; j < N; ++j) {
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combine_and[j] &= output[j];
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combine_or[j] |= output[j];
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}
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}
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for (j = 0; j < N; ++j) {
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tt_int_op(combine_and[j], OP_EQ, 0);
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tt_int_op(combine_or[j], OP_EQ, 0xff);
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}
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done:
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;
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#undef N
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}
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/** Run unit tests for our AES128 functionality */
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static void
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test_crypto_aes128(void *arg)
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@ -3140,15 +2978,6 @@ test_crypto_failure_modes(void *arg)
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struct testcase_t crypto_tests[] = {
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CRYPTO_LEGACY(formats),
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CRYPTO_LEGACY(rng),
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{ "rng_range", test_crypto_rng_range, 0, NULL, NULL },
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{ "rng_strongest", test_crypto_rng_strongest, TT_FORK, NULL, NULL },
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{ "rng_strongest_nosyscall", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"nosyscall" },
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{ "rng_strongest_nofallback", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"nofallback" },
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{ "rng_strongest_broken", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"broken" },
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{ "openssl_version", test_crypto_openssl_version, TT_FORK, NULL, NULL },
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{ "aes_AES", test_crypto_aes128, TT_FORK, &passthrough_setup, (void*)"aes" },
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{ "aes_EVP", test_crypto_aes128, TT_FORK, &passthrough_setup, (void*)"evp" },
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187
src/test/test_crypto_rng.c
Normal file
187
src/test/test_crypto_rng.c
Normal file
@ -0,0 +1,187 @@
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/* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2019, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#include "orconfig.h"
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#define CRYPTO_RAND_PRIVATE
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#include "core/or/or.h"
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#include "test/test.h"
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#include "lib/crypt_ops/aes.h"
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#include "lib/crypt_ops/crypto_format.h"
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#include "lib/crypt_ops/crypto_rand.h"
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/** Run unit tests for our random number generation function and its wrappers.
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*/
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static void
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test_crypto_rng(void *arg)
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{
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int i, j, allok;
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char data1[100], data2[100];
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double d;
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char *h=NULL;
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/* Try out RNG. */
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(void)arg;
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tt_assert(! crypto_seed_rng());
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crypto_rand(data1, 100);
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crypto_rand(data2, 100);
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tt_mem_op(data1,OP_NE, data2,100);
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allok = 1;
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for (i = 0; i < 100; ++i) {
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uint64_t big;
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char *host;
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j = crypto_rand_int(100);
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if (j < 0 || j >= 100)
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allok = 0;
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big = crypto_rand_uint64(UINT64_C(1)<<40);
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if (big >= (UINT64_C(1)<<40))
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allok = 0;
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big = crypto_rand_uint64(UINT64_C(5));
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if (big >= 5)
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allok = 0;
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d = crypto_rand_double();
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tt_assert(d >= 0);
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tt_assert(d < 1.0);
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host = crypto_random_hostname(3,8,"www.",".onion");
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if (strcmpstart(host,"www.") ||
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strcmpend(host,".onion") ||
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strlen(host) < 13 ||
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strlen(host) > 18)
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allok = 0;
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tor_free(host);
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}
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/* Make sure crypto_random_hostname clips its inputs properly. */
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h = crypto_random_hostname(20000, 9000, "www.", ".onion");
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tt_assert(! strcmpstart(h,"www."));
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tt_assert(! strcmpend(h,".onion"));
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tt_int_op(63+4+6, OP_EQ, strlen(h));
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tt_assert(allok);
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done:
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tor_free(h);
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}
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static void
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test_crypto_rng_range(void *arg)
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{
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int got_smallest = 0, got_largest = 0;
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int i;
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(void)arg;
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for (i = 0; i < 1000; ++i) {
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int x = crypto_rand_int_range(5,9);
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tt_int_op(x, OP_GE, 5);
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tt_int_op(x, OP_LT, 9);
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if (x == 5)
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got_smallest = 1;
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if (x == 8)
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got_largest = 1;
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}
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/* These fail with probability 1/10^603. */
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tt_assert(got_smallest);
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tt_assert(got_largest);
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got_smallest = got_largest = 0;
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const uint64_t ten_billion = 10 * ((uint64_t)1000000000000);
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for (i = 0; i < 1000; ++i) {
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uint64_t x = crypto_rand_uint64_range(ten_billion, ten_billion+10);
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tt_u64_op(x, OP_GE, ten_billion);
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tt_u64_op(x, OP_LT, ten_billion+10);
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if (x == ten_billion)
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got_smallest = 1;
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if (x == ten_billion+9)
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got_largest = 1;
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}
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tt_assert(got_smallest);
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tt_assert(got_largest);
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const time_t now = time(NULL);
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for (i = 0; i < 2000; ++i) {
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time_t x = crypto_rand_time_range(now, now+60);
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tt_i64_op(x, OP_GE, now);
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tt_i64_op(x, OP_LT, now+60);
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if (x == now)
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got_smallest = 1;
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if (x == now+59)
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got_largest = 1;
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}
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tt_assert(got_smallest);
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tt_assert(got_largest);
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done:
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;
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}
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static void
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test_crypto_rng_strongest(void *arg)
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{
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const char *how = arg;
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int broken = 0;
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if (how == NULL) {
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;
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} else if (!strcmp(how, "nosyscall")) {
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break_strongest_rng_syscall = 1;
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} else if (!strcmp(how, "nofallback")) {
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break_strongest_rng_fallback = 1;
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} else if (!strcmp(how, "broken")) {
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broken = break_strongest_rng_syscall = break_strongest_rng_fallback = 1;
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}
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#define N 128
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uint8_t combine_and[N];
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uint8_t combine_or[N];
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int i, j;
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memset(combine_and, 0xff, N);
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memset(combine_or, 0, N);
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for (i = 0; i < 100; ++i) { /* 2^-100 chances just don't happen. */
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uint8_t output[N];
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memset(output, 0, N);
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if (how == NULL) {
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/* this one can't fail. */
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crypto_strongest_rand(output, sizeof(output));
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} else {
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int r = crypto_strongest_rand_raw(output, sizeof(output));
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if (r == -1) {
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if (broken) {
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goto done; /* we're fine. */
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}
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/* This function is allowed to break, but only if it always breaks. */
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tt_int_op(i, OP_EQ, 0);
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tt_skip();
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} else {
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tt_assert(! broken);
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}
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}
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for (j = 0; j < N; ++j) {
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combine_and[j] &= output[j];
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combine_or[j] |= output[j];
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}
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}
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for (j = 0; j < N; ++j) {
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tt_int_op(combine_and[j], OP_EQ, 0);
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tt_int_op(combine_or[j], OP_EQ, 0xff);
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}
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done:
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;
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#undef N
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}
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struct testcase_t crypto_rng_tests[] = {
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{ "rng", test_crypto_rng, 0, NULL, NULL },
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{ "rng_range", test_crypto_rng_range, 0, NULL, NULL },
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{ "rng_strongest", test_crypto_rng_strongest, TT_FORK, NULL, NULL },
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{ "rng_strongest_nosyscall", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"nosyscall" },
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{ "rng_strongest_nofallback", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"nofallback" },
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{ "rng_strongest_broken", test_crypto_rng_strongest, TT_FORK,
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&passthrough_setup, (void*)"broken" },
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END_OF_TESTCASES
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};
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