236     std::optional<std::vector<uint8_t>> output = std::nullopt;  in keystore2_sign()  local
237     rc = op->finish(std::move(input), {}, &output);  in keystore2_sign()
250     if (!output) {  in keystore2_sign()
254     return output;  in keystore2_sign()
270     auto output =  in rsa_private_transform()  local
272     if (!output) {  in rsa_private_transform()
276     if (output->size() > len) {  in rsa_private_transform()
281         LOG(WARNING) << "Reply len " << output->size() << " greater than expected " << len;  in rsa_private_transform()
282         memcpy(out, &output->data()[output->size() - len], len);  in rsa_private_transform()
283     } else if (output->size() < len) {  in rsa_private_transform()
288         LOG(WARNING) << "Reply len " << output->size() << " less than expected " << len;  in rsa_private_transform()
290         memcpy(out + len - output->size(), output->data(), output->size());  in rsa_private_transform()
292         memcpy(out, output->data(), len);  in rsa_private_transform()
313     auto output = keystore2_sign(**key_backend, std::vector<uint8_t>(digest, digest + digest_len),  in ecdsa_sign()  local
315     if (!output) {  in ecdsa_sign()
320     if (output->size() == 0) {  in ecdsa_sign()
323     } else if (output->size() > ecdsa_size) {  in ecdsa_sign()
328     memcpy(sig, output->data(), output->size());  in ecdsa_sign()
329     *sig_len = output->size();  in ecdsa_sign()