int RAND_DRBG_set_reseed_interval(RAND_DRBG *drbg, unsigned int interval);
int RAND_DRBG_set_reseed_time_interval(RAND_DRBG *drbg, time_t interval);
-int RAND_DRBG_lock(RAND_DRBG *drbg);
-int RAND_DRBG_unlock(RAND_DRBG *drbg);
-int RAND_DRBG_enable_locking(RAND_DRBG *drbg);
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RAND_DRBG *RAND_DRBG_get0_master(void);
RAND_DRBG *RAND_DRBG_get0_public(void);
RAND_DRBG *RAND_DRBG_get0_private(void);