BN_pseudo_rand
int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom);
LCRYPTO_ALIAS(BN_pseudo_rand);
int (*bn_rand)(BIGNUM *, int, int, int) = pseudo ? BN_pseudo_rand : BN_rand;
LCRYPTO_USED(BN_pseudo_rand);
if (!BN_pseudo_rand(btmp, SERIAL_RAND_BITS, 0, 0))