ocsp_find_signer_sk
if ((signer = ocsp_find_signer_sk(certs, rid)) != NULL) {
if ((flags & OCSP_NOINTERN) == 0 && (signer = ocsp_find_signer_sk(bs->certs, rid))) {
static X509 *ocsp_find_signer_sk(STACK_OF(X509) *certs, OCSP_RESPID *id);