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 "crypto/random.h" |
| 6 | |
Torne (Richard Coles) | 868fa2f | 2013-06-11 10:57:03 +0100 | [diff] [blame] | 7 | #include "base/strings/string_util.h" |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 8 | #include "testing/gtest/include/gtest/gtest.h" |
| 9 | |
| 10 | // Basic functionality tests. Does NOT test the security of the random data. |
| 11 | |
| 12 | // Ensures we don't have all trivial data, i.e. that the data is indeed random. |
| 13 | // Currently, that means the bytes cannot be all the same (e.g. all zeros). |
| 14 | bool IsTrivial(const std::string& bytes) { |
| 15 | for (size_t i = 0; i < bytes.size(); i++) { |
| 16 | if (bytes[i] != bytes[0]) { |
| 17 | return false; |
| 18 | } |
| 19 | } |
| 20 | return true; |
| 21 | } |
| 22 | |
| 23 | TEST(RandBytes, RandBytes) { |
| 24 | std::string bytes(16, '\0'); |
| 25 | crypto::RandBytes(WriteInto(&bytes, bytes.size()), bytes.size()); |
| 26 | EXPECT_TRUE(!IsTrivial(bytes)); |
| 27 | } |