Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
Christopher Tate | 4528186 | 2010-03-05 15:46:30 -0800 | [diff] [blame] | 19 | import android.app.backup.BackupAgent; |
| 20 | import android.app.backup.BackupDataInput; |
| 21 | import android.app.backup.BackupDataOutput; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 22 | import android.content.pm.ApplicationInfo; |
| 23 | import android.content.pm.PackageInfo; |
| 24 | import android.content.pm.PackageManager; |
| 25 | import android.content.pm.PackageManager.NameNotFoundException; |
| 26 | import android.content.pm.Signature; |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 27 | import android.os.Build; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 28 | import android.os.ParcelFileDescriptor; |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 29 | import android.util.Slog; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 30 | |
| 31 | import java.io.ByteArrayInputStream; |
| 32 | import java.io.ByteArrayOutputStream; |
| 33 | import java.io.DataInputStream; |
| 34 | import java.io.DataOutputStream; |
| 35 | import java.io.EOFException; |
| 36 | import java.io.FileInputStream; |
| 37 | import java.io.FileOutputStream; |
| 38 | import java.io.IOException; |
| 39 | import java.util.ArrayList; |
| 40 | import java.util.HashMap; |
| 41 | import java.util.HashSet; |
| 42 | import java.util.List; |
Christopher Tate | b49ceb3 | 2010-02-08 16:22:24 -0800 | [diff] [blame] | 43 | import java.util.Set; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 44 | |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 45 | /** |
| 46 | * We back up the signatures of each package so that during a system restore, |
| 47 | * we can verify that the app whose data we think we have matches the app |
| 48 | * actually resident on the device. |
| 49 | * |
| 50 | * Since the Package Manager isn't a proper "application" we just provide a |
| 51 | * direct IBackupAgent implementation and hand-construct it at need. |
| 52 | */ |
| 53 | public class PackageManagerBackupAgent extends BackupAgent { |
| 54 | private static final String TAG = "PMBA"; |
Christopher Tate | b808a939 | 2009-09-29 16:09:52 -0700 | [diff] [blame] | 55 | private static final boolean DEBUG = false; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 56 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 57 | // key under which we store global metadata (individual app metadata |
| 58 | // is stored using the package name as a key) |
| 59 | private static final String GLOBAL_METADATA_KEY = "@meta@"; |
| 60 | |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 61 | private List<PackageInfo> mAllPackages; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 62 | private PackageManager mPackageManager; |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 63 | // version & signature info of each app in a restore set |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 64 | private HashMap<String, Metadata> mRestoredSignatures; |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 65 | // The version info of each backed-up app as read from the state file |
| 66 | private HashMap<String, Metadata> mStateVersions = new HashMap<String, Metadata>(); |
| 67 | |
| 68 | private final HashSet<String> mExisting = new HashSet<String>(); |
| 69 | private int mStoredSdkVersion; |
| 70 | private String mStoredIncrementalVersion; |
Christopher Tate | 3d7cd13 | 2009-07-07 14:23:07 -0700 | [diff] [blame] | 71 | private boolean mHasMetadata; |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 72 | |
| 73 | public class Metadata { |
| 74 | public int versionCode; |
| 75 | public Signature[] signatures; |
| 76 | |
| 77 | Metadata(int version, Signature[] sigs) { |
| 78 | versionCode = version; |
| 79 | signatures = sigs; |
| 80 | } |
| 81 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 82 | |
| 83 | // We're constructed with the set of applications that are participating |
| 84 | // in backup. This set changes as apps are installed & removed. |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 85 | PackageManagerBackupAgent(PackageManager packageMgr, List<PackageInfo> packages) { |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 86 | mPackageManager = packageMgr; |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 87 | mAllPackages = packages; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 88 | mRestoredSignatures = null; |
Christopher Tate | 3d7cd13 | 2009-07-07 14:23:07 -0700 | [diff] [blame] | 89 | mHasMetadata = false; |
| 90 | } |
| 91 | |
| 92 | public boolean hasMetadata() { |
| 93 | return mHasMetadata; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 94 | } |
| 95 | |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 96 | public Metadata getRestoredMetadata(String packageName) { |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 97 | if (mRestoredSignatures == null) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 98 | Slog.w(TAG, "getRestoredMetadata() before metadata read!"); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 99 | return null; |
| 100 | } |
| 101 | |
| 102 | return mRestoredSignatures.get(packageName); |
| 103 | } |
Christopher Tate | b49ceb3 | 2010-02-08 16:22:24 -0800 | [diff] [blame] | 104 | |
| 105 | public Set<String> getRestoredPackages() { |
| 106 | if (mRestoredSignatures == null) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 107 | Slog.w(TAG, "getRestoredPackages() before metadata read!"); |
Christopher Tate | b49ceb3 | 2010-02-08 16:22:24 -0800 | [diff] [blame] | 108 | return null; |
| 109 | } |
| 110 | |
| 111 | // This is technically the set of packages on the originating handset |
| 112 | // that had backup agents at all, not limited to the set of packages |
| 113 | // that had actually contributed a restore dataset, but it's a |
| 114 | // close enough approximation for our purposes and does not require any |
| 115 | // additional involvement by the transport to obtain. |
| 116 | return mRestoredSignatures.keySet(); |
| 117 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 118 | |
| 119 | // The backed up data is the signature block for each app, keyed by |
| 120 | // the package name. |
| 121 | public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data, |
| 122 | ParcelFileDescriptor newState) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 123 | if (DEBUG) Slog.v(TAG, "onBackup()"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 124 | |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 125 | ByteArrayOutputStream outputBuffer = new ByteArrayOutputStream(); // we'll reuse these |
| 126 | DataOutputStream outputBufferStream = new DataOutputStream(outputBuffer); |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 127 | parseStateFile(oldState); |
| 128 | |
| 129 | // If the stored version string differs, we need to re-backup all |
| 130 | // of the metadata. We force this by removing everything from the |
| 131 | // "already backed up" map built by parseStateFile(). |
| 132 | if (mStoredIncrementalVersion == null |
| 133 | || !mStoredIncrementalVersion.equals(Build.VERSION.INCREMENTAL)) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 134 | Slog.i(TAG, "Previous metadata " + mStoredIncrementalVersion + " mismatch vs " |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 135 | + Build.VERSION.INCREMENTAL + " - rewriting"); |
| 136 | mExisting.clear(); |
| 137 | } |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 138 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 139 | try { |
| 140 | /* |
| 141 | * Global metadata: |
| 142 | * |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 143 | * int SDKversion -- the SDK version of the OS itself on the device |
| 144 | * that produced this backup set. Used to reject |
| 145 | * backups from later OSes onto earlier ones. |
| 146 | * String incremental -- the incremental release name of the OS stored in |
| 147 | * the backup set. |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 148 | */ |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 149 | if (!mExisting.contains(GLOBAL_METADATA_KEY)) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 150 | if (DEBUG) Slog.v(TAG, "Storing global metadata key"); |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 151 | outputBufferStream.writeInt(Build.VERSION.SDK_INT); |
| 152 | outputBufferStream.writeUTF(Build.VERSION.INCREMENTAL); |
| 153 | writeEntity(data, GLOBAL_METADATA_KEY, outputBuffer.toByteArray()); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 154 | } else { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 155 | if (DEBUG) Slog.v(TAG, "Global metadata key already stored"); |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 156 | // don't consider it to have been skipped/deleted |
| 157 | mExisting.remove(GLOBAL_METADATA_KEY); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 158 | } |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 159 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 160 | // For each app we have on device, see if we've backed it up yet. If not, |
| 161 | // write its signature block to the output, keyed on the package name. |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 162 | for (PackageInfo pkg : mAllPackages) { |
| 163 | String packName = pkg.packageName; |
Christopher Tate | 6f31742 | 2009-06-29 18:52:55 -0700 | [diff] [blame] | 164 | if (packName.equals(GLOBAL_METADATA_KEY)) { |
| 165 | // We've already handled the metadata key; skip it here |
| 166 | continue; |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 167 | } else { |
| 168 | PackageInfo info = null; |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 169 | try { |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 170 | info = mPackageManager.getPackageInfo(packName, |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 171 | PackageManager.GET_SIGNATURES); |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 172 | } catch (NameNotFoundException e) { |
| 173 | // Weird; we just found it, and now are told it doesn't exist. |
| 174 | // Treat it as having been removed from the device. |
| 175 | mExisting.add(packName); |
| 176 | continue; |
| 177 | } |
| 178 | |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 179 | if (mExisting.contains(packName)) { |
| 180 | // We have backed up this app before. Check whether the version |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 181 | // of the backup matches the version of the current app; if they |
| 182 | // don't match, the app has been updated and we need to store its |
| 183 | // metadata again. In either case, take it out of mExisting so that |
| 184 | // we don't consider it deleted later. |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 185 | mExisting.remove(packName); |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 186 | if (info.versionCode == mStateVersions.get(packName).versionCode) { |
| 187 | continue; |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 188 | } |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 189 | } |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 190 | |
| 191 | if (info.signatures == null || info.signatures.length == 0) |
| 192 | { |
| 193 | Slog.w(TAG, "Not backing up package " + packName |
| 194 | + " since it appears to have no signatures."); |
| 195 | continue; |
| 196 | } |
| 197 | |
| 198 | // We need to store this app's metadata |
| 199 | /* |
| 200 | * Metadata for each package: |
| 201 | * |
| 202 | * int version -- [4] the package's versionCode |
| 203 | * byte[] signatures -- [len] flattened Signature[] of the package |
| 204 | */ |
| 205 | |
| 206 | // marshal the version code in a canonical form |
| 207 | outputBuffer.reset(); |
| 208 | outputBufferStream.writeInt(info.versionCode); |
| 209 | writeSignatureArray(outputBufferStream, info.signatures); |
| 210 | |
| 211 | if (DEBUG) { |
| 212 | Slog.v(TAG, "+ writing metadata for " + packName |
| 213 | + " version=" + info.versionCode |
| 214 | + " entityLen=" + outputBuffer.size()); |
| 215 | } |
| 216 | |
| 217 | // Now we can write the backup entity for this package |
| 218 | writeEntity(data, packName, outputBuffer.toByteArray()); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 219 | } |
| 220 | } |
| 221 | |
| 222 | // At this point, the only entries in 'existing' are apps that were |
| 223 | // mentioned in the saved state file, but appear to no longer be present |
| 224 | // on the device. Write a deletion entity for them. |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 225 | for (String app : mExisting) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 226 | if (DEBUG) Slog.v(TAG, "- removing metadata for deleted pkg " + app); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 227 | try { |
| 228 | data.writeEntityHeader(app, -1); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 229 | } catch (IOException e) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 230 | Slog.e(TAG, "Unable to write package deletions!"); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 231 | return; |
| 232 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 233 | } |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 234 | } catch (IOException e) { |
| 235 | // Real error writing data |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 236 | Slog.e(TAG, "Unable to write package backup data file!"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 237 | return; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | // Finally, write the new state blob -- just the list of all apps we handled |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 241 | writeStateFile(mAllPackages, newState); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 242 | } |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 243 | |
| 244 | private static void writeEntity(BackupDataOutput data, String key, byte[] bytes) |
| 245 | throws IOException { |
| 246 | data.writeEntityHeader(key, bytes.length); |
| 247 | data.writeEntityData(bytes, bytes.length); |
| 248 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 249 | |
| 250 | // "Restore" here is a misnomer. What we're really doing is reading back the |
| 251 | // set of app signatures associated with each backed-up app in this restore |
| 252 | // image. We'll use those later to determine what we can legitimately restore. |
Christopher Tate | 5cbbf56 | 2009-06-22 16:44:51 -0700 | [diff] [blame] | 253 | public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 254 | throws IOException { |
| 255 | List<ApplicationInfo> restoredApps = new ArrayList<ApplicationInfo>(); |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 256 | HashMap<String, Metadata> sigMap = new HashMap<String, Metadata>(); |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 257 | if (DEBUG) Slog.v(TAG, "onRestore()"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 258 | int storedSystemVersion = -1; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 259 | |
| 260 | while (data.readNextHeader()) { |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 261 | String key = data.getKey(); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 262 | int dataSize = data.getDataSize(); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 263 | |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 264 | if (DEBUG) Slog.v(TAG, " got key=" + key + " dataSize=" + dataSize); |
Christopher Tate | 6aa41f4 | 2009-06-19 14:14:22 -0700 | [diff] [blame] | 265 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 266 | // generic setup to parse any entity data |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 267 | byte[] inputBytes = new byte[dataSize]; |
| 268 | data.readEntityData(inputBytes, 0, dataSize); |
| 269 | ByteArrayInputStream inputBuffer = new ByteArrayInputStream(inputBytes); |
| 270 | DataInputStream inputBufferStream = new DataInputStream(inputBuffer); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 271 | |
| 272 | if (key.equals(GLOBAL_METADATA_KEY)) { |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 273 | int storedSdkVersion = inputBufferStream.readInt(); |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 274 | if (DEBUG) Slog.v(TAG, " storedSystemVersion = " + storedSystemVersion); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 275 | if (storedSystemVersion > Build.VERSION.SDK_INT) { |
| 276 | // returning before setting the sig map means we rejected the restore set |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 277 | Slog.w(TAG, "Restore set was from a later version of Android; not restoring"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 278 | return; |
| 279 | } |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 280 | mStoredSdkVersion = storedSdkVersion; |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 281 | mStoredIncrementalVersion = inputBufferStream.readUTF(); |
Christopher Tate | 3d7cd13 | 2009-07-07 14:23:07 -0700 | [diff] [blame] | 282 | mHasMetadata = true; |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 283 | if (DEBUG) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 284 | Slog.i(TAG, "Restore set version " + storedSystemVersion |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 285 | + " is compatible with OS version " + Build.VERSION.SDK_INT |
| 286 | + " (" + mStoredIncrementalVersion + " vs " |
| 287 | + Build.VERSION.INCREMENTAL + ")"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 288 | } |
| 289 | } else { |
| 290 | // it's a file metadata record |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 291 | int versionCode = inputBufferStream.readInt(); |
| 292 | Signature[] sigs = readSignatureArray(inputBufferStream); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 293 | if (DEBUG) { |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 294 | Slog.i(TAG, " read metadata for " + key |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 295 | + " dataSize=" + dataSize |
| 296 | + " versionCode=" + versionCode + " sigs=" + sigs); |
| 297 | } |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 298 | |
| 299 | if (sigs == null || sigs.length == 0) { |
| 300 | Slog.w(TAG, "Not restoring package " + key |
| 301 | + " since it appears to have no signatures."); |
| 302 | continue; |
| 303 | } |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 304 | |
| 305 | ApplicationInfo app = new ApplicationInfo(); |
| 306 | app.packageName = key; |
| 307 | restoredApps.add(app); |
| 308 | sigMap.put(key, new Metadata(versionCode, sigs)); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 309 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 312 | // On successful completion, cache the signature map for the Backup Manager to use |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 313 | mRestoredSignatures = sigMap; |
| 314 | } |
| 315 | |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 316 | private static void writeSignatureArray(DataOutputStream out, Signature[] sigs) |
| 317 | throws IOException { |
| 318 | // write the number of signatures in the array |
| 319 | out.writeInt(sigs.length); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 320 | |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 321 | // write the signatures themselves, length + flattened buffer |
| 322 | for (Signature sig : sigs) { |
| 323 | byte[] flat = sig.toByteArray(); |
| 324 | out.writeInt(flat.length); |
| 325 | out.write(flat); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 326 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 329 | private static Signature[] readSignatureArray(DataInputStream in) { |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 330 | try { |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 331 | int num; |
| 332 | try { |
| 333 | num = in.readInt(); |
| 334 | } catch (EOFException e) { |
| 335 | // clean termination |
| 336 | Slog.w(TAG, "Read empty signature block"); |
| 337 | return null; |
| 338 | } |
| 339 | |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 340 | if (DEBUG) Slog.v(TAG, " ... unflatten read " + num); |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 341 | |
Christopher Tate | 5a8a115 | 2009-09-10 16:08:47 -0700 | [diff] [blame] | 342 | // Sensical? |
| 343 | if (num > 20) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 344 | Slog.e(TAG, "Suspiciously large sig count in restore data; aborting"); |
Christopher Tate | 5a8a115 | 2009-09-10 16:08:47 -0700 | [diff] [blame] | 345 | throw new IllegalStateException("Bad restore state"); |
| 346 | } |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 347 | |
| 348 | Signature[] sigs = new Signature[num]; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 349 | for (int i = 0; i < num; i++) { |
| 350 | int len = in.readInt(); |
| 351 | byte[] flatSig = new byte[len]; |
| 352 | in.read(flatSig); |
| 353 | sigs[i] = new Signature(flatSig); |
| 354 | } |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 355 | return sigs; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 356 | } catch (IOException e) { |
Jeff Brown | e684d95 | 2010-04-05 17:42:10 -0700 | [diff] [blame] | 357 | Slog.e(TAG, "Unable to read signatures"); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 358 | return null; |
| 359 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | // Util: parse out an existing state file into a usable structure |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 363 | private void parseStateFile(ParcelFileDescriptor stateFile) { |
| 364 | mExisting.clear(); |
| 365 | mStateVersions.clear(); |
| 366 | mStoredSdkVersion = 0; |
| 367 | mStoredIncrementalVersion = null; |
| 368 | |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 369 | // The state file is just the list of app names we have stored signatures for |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 370 | // with the exception of the metadata block, to which is also appended the |
| 371 | // version numbers corresponding with the last time we wrote this PM block. |
| 372 | // If they mismatch the current system, we'll re-store the metadata key. |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 373 | FileInputStream instream = new FileInputStream(stateFile.getFileDescriptor()); |
| 374 | DataInputStream in = new DataInputStream(instream); |
| 375 | |
| 376 | int bufSize = 256; |
| 377 | byte[] buf = new byte[bufSize]; |
| 378 | try { |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 379 | String pkg = in.readUTF(); |
| 380 | if (pkg.equals(GLOBAL_METADATA_KEY)) { |
| 381 | mStoredSdkVersion = in.readInt(); |
| 382 | mStoredIncrementalVersion = in.readUTF(); |
| 383 | mExisting.add(GLOBAL_METADATA_KEY); |
| 384 | } else { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 385 | Slog.e(TAG, "No global metadata in state file!"); |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 386 | return; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 387 | } |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 388 | |
| 389 | // The global metadata was first; now read all the apps |
| 390 | while (true) { |
| 391 | pkg = in.readUTF(); |
| 392 | int versionCode = in.readInt(); |
| 393 | mExisting.add(pkg); |
| 394 | mStateVersions.put(pkg, new Metadata(versionCode, null)); |
| 395 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 396 | } catch (EOFException eof) { |
| 397 | // safe; we're done |
| 398 | } catch (IOException e) { |
| 399 | // whoops, bad state file. abort. |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 400 | Slog.e(TAG, "Unable to read Package Manager state file: " + e); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 401 | } |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 402 | } |
| 403 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 404 | // Util: write out our new backup state file |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 405 | private void writeStateFile(List<PackageInfo> pkgs, ParcelFileDescriptor stateFile) { |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 406 | FileOutputStream outstream = new FileOutputStream(stateFile.getFileDescriptor()); |
| 407 | DataOutputStream out = new DataOutputStream(outstream); |
| 408 | |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 409 | try { |
| 410 | // by the time we get here we know we've stored the global metadata record |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 411 | out.writeUTF(GLOBAL_METADATA_KEY); |
| 412 | out.writeInt(Build.VERSION.SDK_INT); |
| 413 | out.writeUTF(Build.VERSION.INCREMENTAL); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 414 | |
| 415 | // now write all the app names too |
Dan Egnor | efe5264 | 2009-06-24 00:16:33 -0700 | [diff] [blame] | 416 | for (PackageInfo pkg : pkgs) { |
Christopher Tate | 72d19aa | 2009-06-30 12:47:33 -0700 | [diff] [blame] | 417 | out.writeUTF(pkg.packageName); |
| 418 | out.writeInt(pkg.versionCode); |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 419 | } |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 420 | } catch (IOException e) { |
Joe Onorato | 8a9b220 | 2010-02-26 18:56:32 -0800 | [diff] [blame] | 421 | Slog.e(TAG, "Unable to write package manager state file!"); |
Christopher Tate | 3a31a93 | 2009-06-22 15:10:30 -0700 | [diff] [blame] | 422 | return; |
Christopher Tate | 6785dd8 | 2009-06-18 15:58:25 -0700 | [diff] [blame] | 423 | } |
| 424 | } |
| 425 | } |