1 // Copyright 2012 The Chromium Authors 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 <string> 10 11 #include "testing/gtest/include/gtest/gtest.h" 12 13 // Basic functionality tests. Does NOT test the security of the random data. 14 15 // Ensures we don't have all trivial data, i.e. that the data is indeed random. 16 // Currently, that means the bytes cannot be all the same (e.g. all zeros). IsTrivial(const std::string & bytes)17bool IsTrivial(const std::string& bytes) { 18 for (size_t i = 0; i < bytes.size(); i++) { 19 if (bytes[i] != bytes[0]) { 20 return false; 21 } 22 } 23 return true; 24 } 25 TEST(RandBytes,RandBytes)26TEST(RandBytes, RandBytes) { 27 std::string bytes(16, '\0'); 28 crypto::RandBytes(bytes.data(), bytes.size()); 29 EXPECT_FALSE(IsTrivial(bytes)); 30 } 31 TEST(RandBytes,RandBytesAsVector)32TEST(RandBytes, RandBytesAsVector) { 33 auto vector = crypto::RandBytesAsVector(16); 34 EXPECT_FALSE(IsTrivial(std::string(vector.begin(), vector.end()))); 35 } 36