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