| /* |
| * 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.chunking.cdc; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| import static org.testng.Assert.assertThrows; |
| |
| import android.platform.test.annotations.Presubmit; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.RobolectricTestRunner; |
| |
| /** Tests for {@link Hkdf}. */ |
| @RunWith(RobolectricTestRunner.class) |
| @Presubmit |
| public class HkdfTest { |
| /** HKDF Test Case 1 IKM from RFC 5869 */ |
| private static final byte[] HKDF_CASE1_IKM = { |
| 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, |
| 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, |
| 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, |
| 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, |
| 0x0b, 0x0b |
| }; |
| |
| /** HKDF Test Case 1 salt from RFC 5869 */ |
| private static final byte[] HKDF_CASE1_SALT = { |
| 0x00, 0x01, 0x02, 0x03, 0x04, |
| 0x05, 0x06, 0x07, 0x08, 0x09, |
| 0x0a, 0x0b, 0x0c |
| }; |
| |
| /** HKDF Test Case 1 info from RFC 5869 */ |
| private static final byte[] HKDF_CASE1_INFO = { |
| (byte) 0xf0, (byte) 0xf1, (byte) 0xf2, (byte) 0xf3, (byte) 0xf4, |
| (byte) 0xf5, (byte) 0xf6, (byte) 0xf7, (byte) 0xf8, (byte) 0xf9 |
| }; |
| |
| /** First 32 bytes of HKDF Test Case 1 OKM (output) from RFC 5869 */ |
| private static final byte[] HKDF_CASE1_OKM = { |
| (byte) 0x3c, (byte) 0xb2, (byte) 0x5f, (byte) 0x25, (byte) 0xfa, |
| (byte) 0xac, (byte) 0xd5, (byte) 0x7a, (byte) 0x90, (byte) 0x43, |
| (byte) 0x4f, (byte) 0x64, (byte) 0xd0, (byte) 0x36, (byte) 0x2f, |
| (byte) 0x2a, (byte) 0x2d, (byte) 0x2d, (byte) 0x0a, (byte) 0x90, |
| (byte) 0xcf, (byte) 0x1a, (byte) 0x5a, (byte) 0x4c, (byte) 0x5d, |
| (byte) 0xb0, (byte) 0x2d, (byte) 0x56, (byte) 0xec, (byte) 0xc4, |
| (byte) 0xc5, (byte) 0xbf |
| }; |
| |
| /** Test the example from RFC 5869. */ |
| @Test |
| public void hkdf_derivesKeyMaterial() throws Exception { |
| byte[] result = Hkdf.hkdf(HKDF_CASE1_IKM, HKDF_CASE1_SALT, HKDF_CASE1_INFO); |
| |
| assertThat(result).isEqualTo(HKDF_CASE1_OKM); |
| } |
| |
| /** Providing a key that is null should throw a {@link java.lang.NullPointerException}. */ |
| @Test |
| public void hkdf_withNullKey_throwsNullPointerException() throws Exception { |
| assertThrows( |
| NullPointerException.class, |
| () -> Hkdf.hkdf(null, HKDF_CASE1_SALT, HKDF_CASE1_INFO)); |
| } |
| |
| /** Providing a salt that is null should throw a {@link java.lang.NullPointerException}. */ |
| @Test |
| public void hkdf_withNullSalt_throwsNullPointerException() throws Exception { |
| assertThrows( |
| NullPointerException.class, () -> Hkdf.hkdf(HKDF_CASE1_IKM, null, HKDF_CASE1_INFO)); |
| } |
| |
| /** Providing data that is null should throw a {@link java.lang.NullPointerException}. */ |
| @Test |
| public void hkdf_withNullData_throwsNullPointerException() throws Exception { |
| assertThrows( |
| NullPointerException.class, () -> Hkdf.hkdf(HKDF_CASE1_IKM, HKDF_CASE1_SALT, null)); |
| } |
| } |