| /* Copyright 2016 The ChromiumOS Authors | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "dcrypto.h" | |
| /* Constant time comparator. */ | |
| int DCRYPTO_equals(const void *a, const void *b, size_t len) | |
| { | |
| size_t i; | |
| const uint8_t *pa = a; | |
| const uint8_t *pb = b; | |
| uint8_t diff = 0; | |
| for (i = 0; i < len; i++) | |
| diff |= pa[i] ^ pb[i]; | |
| return !diff; | |
| } |