Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2012 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 "base/rand_util.h" |
| 6 | |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 7 | #include <nacl/nacl_random.h> |
| 8 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 9 | #include "base/basictypes.h" |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 10 | #include "base/logging.h" |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 11 | |
| 12 | namespace { |
| 13 | |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 14 | void GetRandomBytes(void* output, size_t num_bytes) { |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 15 | char* output_ptr = static_cast<char*>(output); |
| 16 | while (num_bytes > 0) { |
| 17 | size_t nread; |
| 18 | const int error = nacl_secure_random(output_ptr, num_bytes, &nread); |
| 19 | CHECK_EQ(error, 0); |
| 20 | CHECK_LE(nread, num_bytes); |
| 21 | output_ptr += nread; |
| 22 | num_bytes -= nread; |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 23 | } |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 24 | } |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 25 | |
| 26 | } // namespace |
| 27 | |
| 28 | namespace base { |
| 29 | |
Torne (Richard Coles) | 5d1f7b1 | 2014-02-21 12:16:55 +0000 | [diff] [blame] | 30 | // NOTE: This function must be cryptographically secure. http://crbug.com/140076 |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 31 | uint64 RandUint64() { |
| 32 | uint64 result; |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 33 | GetRandomBytes(&result, sizeof(result)); |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 34 | return result; |
| 35 | } |
| 36 | |
Torne (Richard Coles) | 5d1f7b1 | 2014-02-21 12:16:55 +0000 | [diff] [blame] | 37 | void RandBytes(void* output, size_t output_length) { |
Torne (Richard Coles) | f8ee788 | 2014-06-20 14:52:04 +0100 | [diff] [blame] | 38 | GetRandomBytes(output, output_length); |
Torne (Richard Coles) | 5d1f7b1 | 2014-02-21 12:16:55 +0000 | [diff] [blame] | 39 | } |
| 40 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 41 | } // namespace base |