| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "crypto/random.h" |
| |
| #include <stddef.h> |
| |
| #include <string> |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| // Basic functionality tests. Does NOT test the security of the random data. |
| |
| // Ensures we don't have all trivial data, i.e. that the data is indeed random. |
| // Currently, that means the bytes cannot be all the same (e.g. all zeros). |
| bool IsTrivial(const std::string& bytes) { |
| for (size_t i = 0; i < bytes.size(); i++) { |
| if (bytes[i] != bytes[0]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| TEST(RandBytes, RandBytes) { |
| std::string bytes(16, '\0'); |
| crypto::RandBytes(bytes.data(), bytes.size()); |
| EXPECT_FALSE(IsTrivial(bytes)); |
| } |
| |
| TEST(RandBytes, RandBytesAsVector) { |
| auto vector = crypto::RandBytesAsVector(16); |
| EXPECT_FALSE(IsTrivial(std::string(vector.begin(), vector.end()))); |
| } |