X509_CRL_verify
LCRYPTO_ALIAS(X509_CRL_verify);
LCRYPTO_USED(X509_CRL_verify);
int X509_CRL_verify(X509_CRL *a, EVP_PKEY *r);
if (X509_CRL_verify(crl, pkey) <= 0)
i = X509_CRL_verify(x, pkey);