SKALE-4411 check key ownership for getDecryptionShare

zmq_src/ReqMessage.cpp

@@ -237,6 +237,9 @@ Json::Value deleteBLSKeyReqMessage::process() {
 Json::Value GetDecryptionShareReqMessage::process() {
     auto blsKeyName = getStringRapid("blsKeyName");
     auto publicDecryptionValue = getStringRapid("publicDecryptionValue");
+    if (checkKeyOwnership && !isKeyByOwner(blsKeyName, getStringRapid("cert"))) {
+        throw std::invalid_argument("Only owner of the key can access it");
+    }
     auto result = SGXWalletServer::getDecryptionShareImpl(blsKeyName, publicDecryptionValue);
     result["type"] = ZMQMessage::GET_DECRYPTION_SHARE_RSP;
     return result;