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 7 #include <stddef.h> 8 9 #include "base/strings/string_util.h" 10 #include "testing/gtest/include/gtest/gtest.h" 11 12 // Basic functionality tests. Does NOT test the security of the random data. 13 14 // Ensures we don't have all trivial data, i.e. that the data is indeed random. 15 // Currently, that means the bytes cannot be all the same (e.g. all zeros). 16 bool IsTrivial(const std::string& bytes) { 17 for (size_t i = 0; i < bytes.size(); i++) { 18 if (bytes[i] != bytes[0]) { 19 return false; 20 } 21 } 22 return true; 23 } 24 25 TEST(RandBytes, RandBytes) { 26 std::string bytes(16, '\0'); 27 crypto::RandBytes(base::WriteInto(&bytes, bytes.size()), bytes.size()); 28 EXPECT_TRUE(!IsTrivial(bytes)); 29 } 30
