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.
5 #include "crypto/random.h"
11 #include "base/strings/string_util.h"
12 #include "testing/gtest/include/gtest/gtest.h"
14 // Basic functionality tests. Does NOT test the security of the random data.
16 // Ensures we don't have all trivial data, i.e. that the data is indeed random.
17 // Currently, that means the bytes cannot be all the same (e.g. all zeros).
18 bool IsTrivial(const std::string& bytes) {
19 for (size_t i = 0; i < bytes.size(); i++) {
20 if (bytes[i] != bytes[0]) {
27 TEST(RandBytes, RandBytes) {
28 std::string bytes(16, '\0');
29 crypto::RandBytes(base::WriteInto(&bytes, bytes.size()), bytes.size());
30 EXPECT_TRUE(!IsTrivial(bytes));