/*
* Get the private DRBG.
* Returns pointer to the DRBG on success, NULL on failure.
*/
RAND_DRBG *RAND_DRBG_get0_private(void)
{
RAND_DRBG *drbg;
if (!RUN_ONCE(&rand_drbg_init, do_rand_drbg_init))
return NULL;
drbg = CRYPTO_THREAD_get_local(&private_drbg_thread_local_key);
if (drbg == NULL) {
ossl_init_thread_start(OPENSSL_INIT_THREAD_RAND);
drbg = drbg_setup(drbg_master);
CRYPTO_THREAD_set_local(&private_drbg_thread_local_key, drbg);
}
return drbg;
}
/*
* Get the public DRBG.
* Returns pointer to the DRBG on success, NULL on failure.
*/
RAND_DRBG *RAND_DRBG_get0_public(void)
{
RAND_DRBG *drbg;
if (!RUN_ONCE(&rand_drbg_init, do_rand_drbg_init))
return NULL;
drbg = CRYPTO_THREAD_get_local(&public_drbg);
if (drbg == NULL) {
if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_RAND))
return NULL;
drbg = drbg_setup(master_drbg);
CRYPTO_THREAD_set_local(&public_drbg, drbg);
}
return drbg;
}