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From bhaisaab <>
Subject [GitHub] cloudstack pull request: Use constant-time comparison functions wh...
Date Wed, 14 Jan 2015 10:53:23 GMT
Github user bhaisaab commented on a diff in the pull request:
    --- Diff: server/src/com/cloud/api/ ---
    @@ -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
    +// Unless required by applicable law or agreed to in writing,
    +// software distributed under the License is distributed on an
    +// KIND, either express or implied.  See the License for the
    +// specific language governing permissions and limitations
    +// under the License.
    +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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