15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved.
25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be
35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// found in the LICENSE file.
45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "net/spdy/hpack_string_util.h"
65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
75d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/basictypes.h"
85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
95d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace net {
105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)bool StringPiecesEqualConstantTime(base::StringPiece str1,
125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)                                   base::StringPiece str2) {
135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  size_t size = str1.size();
145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  if (str2.size() != size)
155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)    return false;
165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  uint8 x = 0;
185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  for (size_t i = 0; i < size; ++i) {
195d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)    x |= str1[i] ^ str2[i];
205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  }
215d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)  return x == 0;
225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)}
235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)
245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)}  // namespace net
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