| /* |
| * Copyright (C) 2016 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.pm.backup; |
| |
| import android.content.pm.ApplicationInfo; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageParser.Package; |
| import android.content.pm.Signature; |
| import android.test.AndroidTestCase; |
| import android.test.MoreAsserts; |
| import android.test.suitebuilder.annotation.SmallTest; |
| |
| import com.android.server.backup.BackupUtils; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| @SmallTest |
| public class BackupUtilsTest extends AndroidTestCase { |
| |
| private Signature[] genSignatures(String... signatures) { |
| final Signature[] sigs = new Signature[signatures.length]; |
| for (int i = 0; i < signatures.length; i++){ |
| sigs[i] = new Signature(signatures[i].getBytes()); |
| } |
| return sigs; |
| } |
| |
| private PackageInfo genPackage(String... signatures) { |
| final PackageInfo pi = new PackageInfo(); |
| pi.packageName = "package"; |
| pi.applicationInfo = new ApplicationInfo(); |
| pi.signatures = genSignatures(signatures); |
| |
| return pi; |
| } |
| |
| public void testSignaturesMatch() { |
| final ArrayList<byte[]> stored1 = BackupUtils.hashSignatureArray(Arrays.asList( |
| "abc".getBytes())); |
| final ArrayList<byte[]> stored2 = BackupUtils.hashSignatureArray(Arrays.asList( |
| "abc".getBytes(), "def".getBytes())); |
| |
| PackageInfo pi; |
| |
| // False for null package. |
| assertFalse(BackupUtils.signaturesMatch(stored1, null)); |
| |
| // If it's a system app, signatures don't matter. |
| pi = genPackage("xyz"); |
| pi.applicationInfo.flags |= ApplicationInfo.FLAG_SYSTEM; |
| assertTrue(BackupUtils.signaturesMatch(stored1, pi)); |
| |
| // Non system apps. |
| assertTrue(BackupUtils.signaturesMatch(stored1, genPackage("abc"))); |
| |
| // Superset is okay. |
| assertTrue(BackupUtils.signaturesMatch(stored1, genPackage("abc", "xyz"))); |
| assertTrue(BackupUtils.signaturesMatch(stored1, genPackage("xyz", "abc"))); |
| |
| assertFalse(BackupUtils.signaturesMatch(stored1, genPackage("xyz"))); |
| assertFalse(BackupUtils.signaturesMatch(stored1, genPackage("xyz", "def"))); |
| |
| assertTrue(BackupUtils.signaturesMatch(stored2, genPackage("def", "abc"))); |
| assertTrue(BackupUtils.signaturesMatch(stored2, genPackage("x", "def", "abc", "y"))); |
| |
| // Subset is not okay. |
| assertFalse(BackupUtils.signaturesMatch(stored2, genPackage("abc"))); |
| assertFalse(BackupUtils.signaturesMatch(stored2, genPackage("def"))); |
| } |
| |
| public void testHashSignature() { |
| final byte[] sig1 = "abc".getBytes(); |
| final byte[] sig2 = "def".getBytes(); |
| |
| final byte[] hash1a = BackupUtils.hashSignature(sig1); |
| final byte[] hash1b = BackupUtils.hashSignature(new Signature(sig1)); |
| |
| final byte[] hash2a = BackupUtils.hashSignature(sig2); |
| final byte[] hash2b = BackupUtils.hashSignature(new Signature(sig2)); |
| |
| assertEquals(32, hash1a.length); |
| MoreAsserts.assertEquals(hash1a, hash1b); |
| |
| assertEquals(32, hash2a.length); |
| MoreAsserts.assertEquals(hash2a, hash2b); |
| |
| assertFalse(Arrays.equals(hash1a, hash2a)); |
| |
| final ArrayList<byte[]> listA = BackupUtils.hashSignatureArray(Arrays.asList( |
| "abc".getBytes(), "def".getBytes())); |
| |
| final ArrayList<byte[]> listB = BackupUtils.hashSignatureArray(new Signature[]{ |
| new Signature("abc".getBytes()), new Signature("def".getBytes())}); |
| |
| assertEquals(2, listA.size()); |
| assertEquals(2, listB.size()); |
| |
| MoreAsserts.assertEquals(hash1a, listA.get(0)); |
| MoreAsserts.assertEquals(hash1a, listB.get(0)); |
| |
| MoreAsserts.assertEquals(hash2a, listA.get(1)); |
| MoreAsserts.assertEquals(hash2a, listB.get(1)); |
| } |
| } |