X509_CRL_get0_signature
LCRYPTO_ALIAS(X509_CRL_get0_signature);
LCRYPTO_USED(X509_CRL_get0_signature);
void X509_CRL_get0_signature(const X509_CRL *crl, const ASN1_BIT_STRING **psig,
X509_CRL_get0_signature(crl, NULL, &alg);
X509_CRL_get0_signature(x, NULL, &alg);