Github user bhaisaab commented on a diff in the pull request: https://github.com/apache/cloudstack/pull/65#discussion_r22929307 --- Diff: server/src/com/cloud/api/ConstantTimeComparator.java --- @@ -0,0 +1,36 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. +package com.cloud.api; + +public class ConstantTimeComparator { + + public static boolean compareBytes(byte[] b1, byte[] b2) { + if (b1.length != b2.length) { + return false; + } + + int result = 0; + for (int i = 0; i < b1.length; i++) { + result |= b1[i] ^ b2[i]; --- End diff -- Neat. +1 I would suggest moving this to utils instead of api. The api directory or artifact should hold only contracts, commands and interfaces, if this is in utils it could be re-usable (or maybe not) in future.
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