mirror of
https://github.com/kidfromjupiter/nearby.git
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42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/crypto/random.h"
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#include <stddef.h>
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#include <string>
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#include "gtest/gtest.h"
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#include "internal/crypto/nearby_base.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(nearbybase::WriteInto(&bytes, bytes.size()), bytes.size());
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EXPECT_TRUE(!IsTrivial(bytes));
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}
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