ossl_rsa_get0_libctx
OSSL_LIB_CTX *ossl_rsa_get0_libctx(RSA *r);
bnctx = BN_CTX_secure_new_ex(ossl_rsa_get0_libctx(rsa_pub));
ok = ok && pss_params_fromdata(ossl_rsa_get0_pss_params_30(rsa), &pss_defaults_set, params, rsa_type, ossl_rsa_get0_libctx(rsa));