| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <attestation/HmacKeyManager.h> |
| #include <gtest/gtest.h> |
| |
| namespace android { |
| |
| class HmacKeyManagerTest : public testing::Test { |
| protected: |
| HmacKeyManager mHmacKeyManager; |
| }; |
| |
| /** |
| * Ensure that separate calls to sign the same data are generating the same key. |
| * We avoid asserting against INVALID_HMAC. Since the key is random, there is a non-zero chance |
| * that a specific key and data combination would produce INVALID_HMAC, which would cause flaky |
| * tests. |
| */ |
| TEST_F(HmacKeyManagerTest, GeneratedHmac_IsConsistent) { |
| std::array<uint8_t, 10> data = {4, 3, 5, 1, 8, 5, 2, 7, 1, 8}; |
| |
| std::array<uint8_t, 32> hmac1 = mHmacKeyManager.sign(data.data(), sizeof(data)); |
| std::array<uint8_t, 32> hmac2 = mHmacKeyManager.sign(data.data(), sizeof(data)); |
| ASSERT_EQ(hmac1, hmac2); |
| } |
| |
| /** |
| * Ensure that changes in the hmac verification data produce a different hmac. |
| */ |
| TEST_F(HmacKeyManagerTest, GeneratedHmac_ChangesWhenFieldsChange) { |
| std::array<uint8_t, 10> data = {4, 3, 5, 1, 8, 5, 2, 7, 1, 8}; |
| std::array<uint8_t, 32> initialHmac = mHmacKeyManager.sign(data.data(), sizeof(data)); |
| |
| data[2] = 2; |
| ASSERT_NE(initialHmac, mHmacKeyManager.sign(data.data(), sizeof(data))); |
| } |
| |
| } // namespace android |