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52 lines
1.8 KiB
52 lines
1.8 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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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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* http://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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*/
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#include <attestation/HmacKeyManager.h>
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#include <gtest/gtest.h>
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namespace android {
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class HmacKeyManagerTest : public testing::Test {
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protected:
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HmacKeyManager mHmacKeyManager;
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};
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/**
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* Ensure that separate calls to sign the same data are generating the same key.
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* We avoid asserting against INVALID_HMAC. Since the key is random, there is a non-zero chance
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* that a specific key and data combination would produce INVALID_HMAC, which would cause flaky
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* tests.
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*/
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TEST_F(HmacKeyManagerTest, GeneratedHmac_IsConsistent) {
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std::array<uint8_t, 10> data = {4, 3, 5, 1, 8, 5, 2, 7, 1, 8};
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std::array<uint8_t, 32> hmac1 = mHmacKeyManager.sign(data.data(), sizeof(data));
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std::array<uint8_t, 32> hmac2 = mHmacKeyManager.sign(data.data(), sizeof(data));
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ASSERT_EQ(hmac1, hmac2);
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}
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/**
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* Ensure that changes in the hmac verification data produce a different hmac.
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*/
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TEST_F(HmacKeyManagerTest, GeneratedHmac_ChangesWhenFieldsChange) {
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std::array<uint8_t, 10> data = {4, 3, 5, 1, 8, 5, 2, 7, 1, 8};
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std::array<uint8_t, 32> initialHmac = mHmacKeyManager.sign(data.data(), sizeof(data));
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data[2] = 2;
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ASSERT_NE(initialHmac, mHmacKeyManager.sign(data.data(), sizeof(data)));
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}
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} // namespace android
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