#define make_drbg_test_data_no_df(nid, pr, p) \
make_drbg_test_data(nid, RAND_DRBG_FLAG_CTR_NO_DF, pr, p)
+#define make_drbg_test_data_hash(nid, pr, p) \
+ make_drbg_test_data(nid, RAND_DRBG_FLAG_HMAC, hmac_##pr, p), \
+ make_drbg_test_data(nid, 0, pr, p)
+
static DRBG_SELFTEST_DATA drbg_test[] = {
make_drbg_test_data_no_df (NID_aes_128_ctr, aes_128_no_df, 0),
make_drbg_test_data_no_df (NID_aes_192_ctr, aes_192_no_df, 0),
make_drbg_test_data_use_df(NID_aes_128_ctr, aes_128_use_df, 0),
make_drbg_test_data_use_df(NID_aes_192_ctr, aes_192_use_df, 0),
make_drbg_test_data_use_df(NID_aes_256_ctr, aes_256_use_df, 1),
+ make_drbg_test_data_hash(NID_sha1, sha1, 0),
+ make_drbg_test_data_hash(NID_sha224, sha224, 0),
+ make_drbg_test_data_hash(NID_sha256, sha256, 1),
+ make_drbg_test_data_hash(NID_sha384, sha384, 0),
+ make_drbg_test_data_hash(NID_sha512, sha512, 0),
};
static int app_data_index;
RAND_DRBG *drbg = NULL;
TEST_CTX t;
unsigned char buff[1024];
- unsigned int generate_counter_tmp;
+ unsigned int reseed_counter_tmp;
int ret = 0;
- if (!TEST_ptr(drbg = RAND_DRBG_new(0, 0, NULL)))
+ if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL)))
goto err;
/*
* Entropy source tests
*/
- /* Test entropy source failure detecion: i.e. returns no data */
+ /* Test entropy source failure detection: i.e. returns no data */
t.entropylen = 0;
if (TEST_int_le(RAND_DRBG_instantiate(drbg, td->pers, td->perslen), 0))
goto err;
/* Instantiate again with valid data */
if (!instantiate(drbg, td, &t))
goto err;
- generate_counter_tmp = drbg->generate_counter;
- drbg->generate_counter = drbg->reseed_interval;
+ reseed_counter_tmp = drbg->reseed_gen_counter;
+ drbg->reseed_gen_counter = drbg->reseed_interval;
/* Generate output and check entropy has been requested for reseed */
t.entropycnt = 0;
if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
td->adin, td->adinlen))
|| !TEST_int_eq(t.entropycnt, 1)
- || !TEST_int_eq(drbg->generate_counter, generate_counter_tmp + 1)
+ || !TEST_int_eq(drbg->reseed_gen_counter, reseed_counter_tmp + 1)
|| !uninstantiate(drbg))
goto err;
/* Test reseed counter works */
if (!instantiate(drbg, td, &t))
goto err;
- generate_counter_tmp = drbg->generate_counter;
- drbg->generate_counter = drbg->reseed_interval;
+ reseed_counter_tmp = drbg->reseed_gen_counter;
+ drbg->reseed_gen_counter = drbg->reseed_interval;
/* Generate output and check entropy has been requested for reseed */
t.entropycnt = 0;
if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
td->adin, td->adinlen))
|| !TEST_int_eq(t.entropycnt, 1)
- || !TEST_int_eq(drbg->generate_counter, generate_counter_tmp + 1)
+ || !TEST_int_eq(drbg->reseed_gen_counter, reseed_counter_tmp + 1)
|| !uninstantiate(drbg))
goto err;
*/
/* Test whether seed propagation is enabled */
- if (!TEST_int_ne(master->reseed_counter, 0)
- || !TEST_int_ne(public->reseed_counter, 0)
- || !TEST_int_ne(private->reseed_counter, 0))
+ if (!TEST_int_ne(master->reseed_prop_counter, 0)
+ || !TEST_int_ne(public->reseed_prop_counter, 0)
+ || !TEST_int_ne(private->reseed_prop_counter, 0))
return 0;
/* Check whether the master DRBG's reseed counter is the largest one */
- if (!TEST_int_le(public->reseed_counter, master->reseed_counter)
- || !TEST_int_le(private->reseed_counter, master->reseed_counter))
+ if (!TEST_int_le(public->reseed_prop_counter, master->reseed_prop_counter)
+ || !TEST_int_le(private->reseed_prop_counter, master->reseed_prop_counter))
return 0;
/*
if (expect_success == 1) {
/* Test whether all three reseed counters are synchronized */
- if (!TEST_int_eq(public->reseed_counter, master->reseed_counter)
- || !TEST_int_eq(private->reseed_counter, master->reseed_counter))
+ if (!TEST_int_eq(public->reseed_prop_counter, master->reseed_prop_counter)
+ || !TEST_int_eq(private->reseed_prop_counter, master->reseed_prop_counter))
return 0;
/* Test whether reseed time of master DRBG is set correctly */
* setup correctly, in particular whether reseeding works
* as designed.
*/
-static int test_rand_reseed(void)
+static int test_rand_drbg_reseed(void)
{
RAND_DRBG *master, *public, *private;
unsigned char rand_add_buf[256];
* Test whether the public and private DRBG are both reseeded when their
* reseed counters differ from the master's reseed counter.
*/
- master->reseed_counter++;
+ master->reseed_prop_counter++;
if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 1)))
goto error;
reset_drbg_hook_ctx();
* Test whether the public DRBG is reseeded when its reseed counter differs
* from the master's reseed counter.
*/
- master->reseed_counter++;
- private->reseed_counter++;
+ master->reseed_prop_counter++;
+ private->reseed_prop_counter++;
if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 0)))
goto error;
reset_drbg_hook_ctx();
* Test whether the private DRBG is reseeded when its reseed counter differs
* from the master's reseed counter.
*/
- master->reseed_counter++;
- public->reseed_counter++;
+ master->reseed_prop_counter++;
+ public->reseed_prop_counter++;
if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 1)))
goto error;
reset_drbg_hook_ctx();
* Test whether none of the DRBGs is reseed if the master fails to reseed
*/
master_ctx.fail = 1;
- master->reseed_counter++;
+ master->reseed_prop_counter++;
RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
if (!TEST_true(test_drbg_reseed(0, master, public, private, 0, 0, 0)))
goto error;
}
#endif
+#ifdef OPENSSL_RAND_SEED_NONE
/*
- * This function only returns the entropy already added with RAND_add(),
- * and does not get entropy from the OS.
+ * Calculates the minimum buffer length which needs to be
+ * provided to RAND_seed() in order to successfully
+ * instantiate the DRBG.
*
- * Returns 0 on failure and the size of the buffer on success.
+ * Copied from rand_drbg_seedlen() in rand_drbg.c
*/
-static size_t get_pool_entropy(RAND_DRBG *drbg,
- unsigned char **pout,
- int entropy, size_t min_len, size_t max_len,
- int prediction_resistance)
+static size_t rand_drbg_seedlen(RAND_DRBG *drbg)
{
- if (drbg->pool == NULL)
- return 0;
+ /*
+ * If no os entropy source is available then RAND_seed(buffer, bufsize)
+ * is expected to succeed if and only if the buffer length satisfies
+ * the following requirements, which follow from the calculations
+ * in RAND_DRBG_instantiate().
+ */
+ size_t min_entropy = drbg->strength;
+ size_t min_entropylen = drbg->min_entropylen;
- if (drbg->pool->entropy < (size_t)entropy || drbg->pool->len < min_len
- || drbg->pool->len > max_len)
- return 0;
+ /*
+ * Extra entropy for the random nonce in the absence of a
+ * get_nonce callback, see comment in RAND_DRBG_instantiate().
+ */
+ if (drbg->min_noncelen > 0 && drbg->get_nonce == NULL) {
+ min_entropy += drbg->strength / 2;
+ min_entropylen += drbg->min_noncelen;
+ }
+
+ /*
+ * Convert entropy requirement from bits to bytes
+ * (dividing by 8 without rounding upwards, because
+ * all entropy requirements are divisible by 8).
+ */
+ min_entropy >>= 3;
- *pout = drbg->pool->buffer;
- return drbg->pool->len;
+ /* Return a value that satisfies both requirements */
+ return min_entropy > min_entropylen ? min_entropy : min_entropylen;
}
+#endif /*OPENSSL_RAND_SEED_NONE*/
/*
- * Clean up the entropy that get_pool_entropy() returned.
+ * Test that instantiation with RAND_seed() works as expected
+ *
+ * If no os entropy source is available then RAND_seed(buffer, bufsize)
+ * is expected to succeed if and only if the buffer length is at least
+ * rand_drbg_seedlen(master) bytes.
+ *
+ * If an os entropy source is available then RAND_seed(buffer, bufsize)
+ * is expected to succeed always.
*/
-static void cleanup_pool_entropy(RAND_DRBG *drbg, unsigned char *out, size_t outlen)
+static int test_rand_seed(void)
{
- OPENSSL_secure_clear_free(drbg->pool->buffer, drbg->pool->max_len);
- OPENSSL_free(drbg->pool);
- drbg->pool = NULL;
+ RAND_DRBG *master = RAND_DRBG_get0_master();
+ unsigned char rand_buf[256];
+ size_t rand_buflen;
+#ifdef OPENSSL_RAND_SEED_NONE
+ size_t required_seed_buflen = rand_drbg_seedlen(master);
+#else
+ size_t required_seed_buflen = 0;
+#endif
+
+ memset(rand_buf, 0xCD, sizeof(rand_buf));
+
+ for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
+ RAND_DRBG_uninstantiate(master);
+ RAND_seed(rand_buf, rand_buflen);
+
+ if (!TEST_int_eq(RAND_status(),
+ (rand_buflen >= required_seed_buflen)))
+ return 0;
+ }
+
+ return 1;
}
/*
- * Test that instantiating works when OS entropy is not available and that
- * RAND_add() is enough to reseed it.
+ * Test that adding additional data with RAND_add() works as expected
+ * when the master DRBG is instantiated (and below its reseed limit).
+ *
+ * This should succeed regardless of whether an os entropy source is
+ * available or not.
*/
static int test_rand_add(void)
{
- RAND_DRBG *master = RAND_DRBG_get0_master();
- RAND_DRBG_get_entropy_fn old_get_entropy = master->get_entropy;
- RAND_DRBG_cleanup_entropy_fn old_cleanup_entropy = master->cleanup_entropy;
+ unsigned char rand_buf[256];
+ size_t rand_buflen;
+
+ memset(rand_buf, 0xCD, sizeof(rand_buf));
+
+ /* make sure it's instantiated */
+ RAND_seed(rand_buf, sizeof(rand_buf));
+ if (!TEST_true(RAND_status()))
+ return 0;
+
+ for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
+ RAND_add(rand_buf, rand_buflen, 0.0);
+ if (!TEST_true(RAND_status()))
+ return 0;
+ }
+
+ return 1;
+}
+
+static int test_multi_set(void)
+{
int rv = 0;
- unsigned char rand_add_buf[256];
+ RAND_DRBG *drbg = NULL;
- master->get_entropy = get_pool_entropy;
- master->cleanup_entropy = cleanup_pool_entropy;
- master->reseed_counter++;
- RAND_DRBG_uninstantiate(master);
- memset(rand_add_buf, 0xCD, sizeof(rand_add_buf));
- RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
- if (!TEST_true(RAND_DRBG_instantiate(master, NULL, 0)))
- goto error;
+ /* init drbg with default CTR initializer */
+ if (!TEST_ptr(drbg = RAND_DRBG_new(0, 0, NULL)))
+ goto err;
+ /* change it to use hmac */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
+ goto err;
+ /* use same type */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
+ goto err;
+ /* change it to use hash */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
+ goto err;
+ /* use same type */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
+ goto err;
+ /* change it to use ctr */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
+ goto err;
+ /* use same type */
+ if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
+ goto err;
+ if (!TEST_int_gt(RAND_DRBG_instantiate(drbg, NULL, 0), 0))
+ goto err;
rv = 1;
-
-error:
- master->get_entropy = old_get_entropy;
- master->cleanup_entropy = old_cleanup_entropy;
+err:
+ uninstantiate(drbg);
+ RAND_DRBG_free(drbg);
return rv;
}
+static int test_set_defaults(void)
+{
+ RAND_DRBG *master, *public, *private;
+
+ master = RAND_DRBG_get0_master();
+ public = RAND_DRBG_get0_public();
+ private = RAND_DRBG_get0_private();
+
+ /* Check the default type and flags for master, public and private */
+ return TEST_int_eq(master->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(master->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_MASTER)
+ && TEST_int_eq(public->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(public->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
+ && TEST_int_eq(private->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(private->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
+
+ /* change master DRBG and check again */
+ && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
+ RAND_DRBG_FLAG_MASTER))
+ && TEST_true(RAND_DRBG_uninstantiate(master))
+ && TEST_int_eq(master->type, NID_sha256)
+ && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
+ && TEST_int_eq(public->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(public->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
+ && TEST_int_eq(private->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(private->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
+ /* change private DRBG and check again */
+ && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
+ RAND_DRBG_FLAG_PRIVATE|RAND_DRBG_FLAG_HMAC))
+ && TEST_true(RAND_DRBG_uninstantiate(private))
+ && TEST_int_eq(master->type, NID_sha256)
+ && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
+ && TEST_int_eq(public->type, RAND_DRBG_TYPE)
+ && TEST_int_eq(public->flags,
+ RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
+ && TEST_int_eq(private->type, NID_sha256)
+ && TEST_int_eq(private->flags,
+ RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
+ /* change public DRBG and check again */
+ && TEST_true(RAND_DRBG_set_defaults(NID_sha1,
+ RAND_DRBG_FLAG_PUBLIC
+ | RAND_DRBG_FLAG_HMAC))
+ && TEST_true(RAND_DRBG_uninstantiate(public))
+ && TEST_int_eq(master->type, NID_sha256)
+ && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
+ && TEST_int_eq(public->type, NID_sha1)
+ && TEST_int_eq(public->flags,
+ RAND_DRBG_FLAG_PUBLIC | RAND_DRBG_FLAG_HMAC)
+ && TEST_int_eq(private->type, NID_sha256)
+ && TEST_int_eq(private->flags,
+ RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
+ /* Change DRBG defaults and change public and check again */
+ && TEST_true(RAND_DRBG_set_defaults(NID_sha256, 0))
+ && TEST_true(RAND_DRBG_uninstantiate(public))
+ && TEST_int_eq(public->type, NID_sha256)
+ && TEST_int_eq(public->flags, RAND_DRBG_FLAG_PUBLIC)
+
+ /* Change DRBG defaults and change master and check again */
+ && TEST_true(RAND_DRBG_set_defaults(NID_aes_256_ctr,
+ RAND_DRBG_FLAG_CTR_NO_DF))
+ && TEST_true(RAND_DRBG_uninstantiate(master))
+ && TEST_int_eq(master->type, NID_aes_256_ctr)
+ && TEST_int_eq(master->flags,
+ RAND_DRBG_FLAG_MASTER|RAND_DRBG_FLAG_CTR_NO_DF)
+
+ /* Reset back to the standard defaults */
+ && TEST_true(RAND_DRBG_set_defaults(RAND_DRBG_TYPE,
+ RAND_DRBG_FLAGS
+ | RAND_DRBG_FLAG_MASTER
+ | RAND_DRBG_FLAG_PUBLIC
+ | RAND_DRBG_FLAG_PRIVATE))
+ && TEST_true(RAND_DRBG_uninstantiate(master))
+ && TEST_true(RAND_DRBG_uninstantiate(public))
+ && TEST_true(RAND_DRBG_uninstantiate(private));
+}
+
int setup_tests(void)
{
app_data_index = RAND_DRBG_get_ex_new_index(0L, NULL, NULL, NULL, NULL);
ADD_ALL_TESTS(test_kats, OSSL_NELEM(drbg_test));
ADD_ALL_TESTS(test_error_checks, OSSL_NELEM(drbg_test));
- ADD_TEST(test_rand_reseed);
+ ADD_TEST(test_rand_drbg_reseed);
+ ADD_TEST(test_rand_seed);
ADD_TEST(test_rand_add);
+ ADD_TEST(test_multi_set);
+ ADD_TEST(test_set_defaults);
#if defined(OPENSSL_THREADS)
ADD_TEST(test_multi_thread);
#endif
projects / oweals / openssl.git / blobdiff