OCSP_cert_to_id
OCSP_CERTID *ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca_cert);
cid_resp_md = OCSP_cert_to_id(resp_md, NULL, ca_cert);
id = OCSP_cert_to_id(cert_id_md, cert, issuer);
id = OCSP_cert_to_id(NULL, x, cert);
id = OCSP_cert_to_id(NULL, x, X509_OBJECT_get0_X509(obj));
id = OCSP_cert_to_id(NULL, x509_1, x509_2);
OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject,