mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 00:06:09 +03:00
30 lines
1.0 KiB
C
30 lines
1.0 KiB
C
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef CRYPTO_SECURE_UTIL_H_
|
||
|
|
#define CRYPTO_SECURE_UTIL_H_
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include "crypto/crypto_export.h"
|
||
|
|
|
||
|
|
namespace crypto {
|
||
|
|
|
||
|
|
// Performs a constant-time comparison of two strings, returning true if the
|
||
|
|
// strings are equal.
|
||
|
|
//
|
||
|
|
// For cryptographic operations, comparison functions such as memcmp() may
|
||
|
|
// expose side-channel information about input, allowing an attacker to
|
||
|
|
// perform timing analysis to determine what the expected bits should be. In
|
||
|
|
// order to avoid such attacks, the comparison must execute in constant time,
|
||
|
|
// so as to not to reveal to the attacker where the difference(s) are.
|
||
|
|
// For an example attack, see
|
||
|
|
// http://groups.google.com/group/keyczar-discuss/browse_thread/thread/5571eca0948b2a13
|
||
|
|
CRYPTO_EXPORT bool SecureMemEqual(const void* s1, const void* s2, size_t n);
|
||
|
|
|
||
|
|
} // namespace crypto
|
||
|
|
|
||
|
|
#endif // CRYPTO_SECURE_UTIL_H_
|
||
|
|
|