| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| package com.android.server.backup.encryption.keys; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| import android.platform.test.annotations.Presubmit; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.RobolectricTestRunner; |
| |
| import java.security.SecureRandom; |
| |
| import javax.crypto.SecretKey; |
| |
| /** Tests for {@link TertiaryKeyGenerator}. */ |
| @RunWith(RobolectricTestRunner.class) |
| @Presubmit |
| public class TertiaryKeyGeneratorTest { |
| private static final String KEY_ALGORITHM = "AES"; |
| private static final int KEY_SIZE_BITS = 256; |
| |
| private TertiaryKeyGenerator mTertiaryKeyGenerator; |
| |
| /** Instantiate a new {@link TertiaryKeyGenerator} for use in tests. */ |
| @Before |
| public void setUp() { |
| mTertiaryKeyGenerator = new TertiaryKeyGenerator(new SecureRandom()); |
| } |
| |
| /** Generated keys should be AES keys. */ |
| @Test |
| public void generate_generatesAESKeys() { |
| SecretKey secretKey = mTertiaryKeyGenerator.generate(); |
| |
| assertThat(secretKey.getAlgorithm()).isEqualTo(KEY_ALGORITHM); |
| } |
| |
| /** Generated keys should be 256 bits in size. */ |
| @Test |
| public void generate_generates256BitKeys() { |
| SecretKey secretKey = mTertiaryKeyGenerator.generate(); |
| |
| assertThat(secretKey.getEncoded()).hasLength(KEY_SIZE_BITS / 8); |
| } |
| |
| /** |
| * Subsequent calls to {@link TertiaryKeyGenerator#generate()} should generate different keys. |
| */ |
| @Test |
| public void generate_generatesNewKeys() { |
| SecretKey key1 = mTertiaryKeyGenerator.generate(); |
| SecretKey key2 = mTertiaryKeyGenerator.generate(); |
| |
| assertThat(key1).isNotEqualTo(key2); |
| } |
| } |