if (!policy.getTrustEngine()->validate(*(signable->getSignature()), *(policy.getMetadataProvider()), &cc)) {
log.error("unable to verify message signature with supplied trust engine");
if (!policy.getTrustEngine()->validate(*(signable->getSignature()), *(policy.getMetadataProvider()), &cc)) {
log.error("unable to verify message signature with supplied trust engine");