RSA_get0_factors
void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);
RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);