net/spdy/hpack_string_util.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/spdy/hpack_string_util.h"
   6
   7 #include "base/basictypes.h"
   8
   9 namespace net {
  10
  11 bool StringPiecesEqualConstantTime(base::StringPiece str1,
  12                                    base::StringPiece str2) {
  13   size_t size = str1.size();
  14   if (str2.size() != size)
  15     return false;
  16
  17   uint8 x = 0;
  18   for (size_t i = 0; i < size; ++i) {
  19     x |= str1[i] ^ str2[i];
  20   }
  21   return x == 0;
  22 }
  23
  24 }  // namespace net