| Vitaly Buka | 45dc9df | 2015-12-07 21:30:19 -0800 | [diff] [blame] | 1 | // Copyright 2015 The Weave 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 | #ifndef LIBUWEAVE_SRC_CRYPTO_UTILS_H_ |
| 6 | #define LIBUWEAVE_SRC_CRYPTO_UTILS_H_ |
| 7 | |
| 8 | #include <stdbool.h> |
| 9 | #include <stddef.h> |
| 10 | #include <stdint.h> |
| 11 | |
| 12 | /** |
| 13 | * Check if two byte arrays are the same in constant time (the running time |
| 14 | * should only depend on the length of the given arrays). It's critical to use |
| 15 | * constant-time methods to compare secret data. Timing information can lead to |
| 16 | * full recovery of the secret data. |
| 17 | */ |
| 18 | bool uw_crypto_utils_equal_(const uint8_t* arr1, |
| 19 | const uint8_t* arr2, |
| 20 | size_t len); |
| 21 | |
| 22 | #endif // LIBUWEAVE_SRC_CRYPTO_UTILS_H_ |
