Return the shared primary DRBG for a library context (used to reseed public/private DRBGs).
Declared in <openssl/rand.h>
<openssl/rand.h>
EVP_RAND_CTX* RAND_get0_primary(OSSL_LIB_CTX* ctx);
Internal EVP_RAND_CTX pointer (do not free); not safe for concurrent direct use.