Felipe Leme | 5381aa4 | 2016-10-13 09:02:32 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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.autofill; |
| 18 | |
| 19 | import static android.Manifest.permission.MANAGE_AUTO_FILL; |
| 20 | import static android.content.Context.AUTO_FILL_MANAGER_SERVICE; |
| 21 | |
| 22 | import android.Manifest; |
| 23 | import android.app.ActivityManager; |
| 24 | import android.app.AppGlobals; |
| 25 | import android.content.ComponentName; |
| 26 | import android.content.ContentResolver; |
| 27 | import android.content.Context; |
| 28 | import android.content.pm.PackageManager; |
| 29 | import android.content.pm.ServiceInfo; |
| 30 | import android.database.ContentObserver; |
| 31 | import android.net.Uri; |
| 32 | import android.os.Binder; |
| 33 | import android.os.Bundle; |
| 34 | import android.os.Handler; |
| 35 | import android.os.IBinder; |
| 36 | import android.os.Parcel; |
| 37 | import android.os.RemoteException; |
| 38 | import android.os.ResultReceiver; |
| 39 | import android.os.ShellCallback; |
| 40 | import android.os.UserHandle; |
| 41 | import android.provider.Settings; |
| 42 | import android.service.autofill.IAutoFillManagerService; |
| 43 | import android.text.TextUtils; |
| 44 | import android.util.Slog; |
| 45 | import android.util.SparseArray; |
| 46 | |
| 47 | import com.android.internal.annotations.GuardedBy; |
| 48 | import com.android.internal.os.BackgroundThread; |
| 49 | import com.android.server.FgThread; |
| 50 | import com.android.server.SystemService; |
| 51 | |
| 52 | import java.io.FileDescriptor; |
| 53 | import java.io.PrintWriter; |
| 54 | |
| 55 | /** |
| 56 | * Entry point service for auto-fill management. |
| 57 | * |
| 58 | * <p>This service provides the {@link IAutoFillManagerService} implementation and keeps a list of |
| 59 | * {@link AutoFillManagerServiceImpl} per user; the real work is done by |
| 60 | * {@link AutoFillManagerServiceImpl} itself. |
| 61 | */ |
| 62 | public final class AutoFillManagerService extends SystemService { |
| 63 | |
| 64 | private static final String TAG = "AutoFillManagerService"; |
| 65 | private static final boolean DEBUG = true; // TODO: change to false once stable |
| 66 | |
| 67 | private final AutoFillManagerServiceStub mServiceStub; |
| 68 | private final Context mContext; |
| 69 | private final ContentResolver mResolver; |
| 70 | |
| 71 | private final Object mLock = new Object(); |
| 72 | |
| 73 | @GuardedBy("mLock") |
| 74 | private boolean mSafeMode; |
| 75 | |
| 76 | /** |
| 77 | * Map of {@link AutoFillManagerServiceImpl} per user id. |
| 78 | * <p> |
| 79 | * It has to be mapped by user id because the same current user could have simultaneous sessions |
| 80 | * associated to different user profiles (for example, in a multi-window environment). |
| 81 | * <p> |
| 82 | * This map is filled on demand in the following scenarios: |
| 83 | * <ol> |
| 84 | * <li>On start, it sets the value for the default user. |
| 85 | * <li>When an auto-fill service app is removed, its entries are removed. |
| 86 | * <li>When the current user changes. |
| 87 | * <li>When the {@link android.provider.Settings.Secure#AUTO_FILL_SERVICE} changes. |
| 88 | * </ol> |
| 89 | */ |
| 90 | // TODO: make sure all cases listed above are handled |
| 91 | // TODO: should entries be removed when there is no section and have not be used for a while? |
| 92 | @GuardedBy("mLock") |
| 93 | private SparseArray<AutoFillManagerServiceImpl> mImplByUser = new SparseArray<>(); |
| 94 | |
| 95 | // TODO: should disable it on low-memory devices? if not, this attribute should be removed... |
| 96 | private final boolean mEnableService = true; |
| 97 | |
| 98 | public AutoFillManagerService(Context context) { |
| 99 | super(context); |
| 100 | |
| 101 | mContext = context; |
| 102 | mResolver = context.getContentResolver(); |
| 103 | mServiceStub = new AutoFillManagerServiceStub(); |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public void onStart() { |
| 108 | if (DEBUG) |
| 109 | Slog.d(TAG, "onStart(): binding as " + AUTO_FILL_MANAGER_SERVICE); |
| 110 | publishBinderService(AUTO_FILL_MANAGER_SERVICE, mServiceStub); |
| 111 | } |
| 112 | |
| 113 | // TODO: refactor so it's bound on demand, in which case it can use isSafeMode() from PM. |
| 114 | @Override |
| 115 | public void onBootPhase(int phase) { |
| 116 | if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) { |
| 117 | systemRunning(isSafeMode()); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | // TODO: refactor so it's bound on demand, in which case it can use isSafeMode() from PM. |
| 122 | @Override |
| 123 | public void onStartUser(int userHandle) { |
| 124 | if (DEBUG) Slog.d(TAG, "onStartUser(): userHandle=" + userHandle); |
| 125 | |
| 126 | updateImplementationIfNeeded(userHandle, false); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | public void onUnlockUser(int userHandle) { |
| 131 | if (DEBUG) Slog.d(TAG, "onUnlockUser(): userHandle=" + userHandle); |
| 132 | |
| 133 | updateImplementationIfNeeded(userHandle, false); |
| 134 | } |
| 135 | |
| 136 | @Override |
| 137 | public void onSwitchUser(int userHandle) { |
| 138 | if (DEBUG) Slog.d(TAG, "onSwitchUser(): userHandle=" + userHandle); |
| 139 | |
| 140 | updateImplementationIfNeeded(userHandle, false); |
| 141 | } |
| 142 | |
| 143 | private void systemRunning(boolean safeMode) { |
| 144 | if (DEBUG) Slog.d(TAG, "systemRunning(): safeMode=" + safeMode); |
| 145 | |
| 146 | // TODO: register a PackageMonitor |
| 147 | new SettingsObserver(BackgroundThread.getHandler()); |
| 148 | |
| 149 | synchronized (mLock) { |
| 150 | mSafeMode = safeMode; |
| 151 | updateImplementationIfNeededLocked(ActivityManager.getCurrentUser(), false); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | private void updateImplementationIfNeeded(int user, boolean force) { |
| 156 | synchronized (mLock) { |
| 157 | updateImplementationIfNeededLocked(user, force); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | private void updateImplementationIfNeededLocked(int user, boolean force) { |
| 162 | if (DEBUG) |
| 163 | Slog.d(TAG, "updateImplementationIfNeededLocked(" + user + ", " + force + ")"); |
| 164 | |
| 165 | if (mSafeMode) { |
| 166 | if (DEBUG) Slog.d(TAG, "skipping on safe mode"); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | final String curService = Settings.Secure.getStringForUser( |
| 171 | mResolver, Settings.Secure.AUTO_FILL_SERVICE, user); |
| 172 | if (DEBUG) |
| 173 | Slog.d(TAG, "Current service settings for user " + user + ": " + curService); |
| 174 | ComponentName serviceComponent = null; |
| 175 | ServiceInfo serviceInfo = null; |
| 176 | if (!TextUtils.isEmpty(curService)) { |
| 177 | try { |
| 178 | serviceComponent = ComponentName.unflattenFromString(curService); |
| 179 | serviceInfo = |
| 180 | AppGlobals.getPackageManager().getServiceInfo(serviceComponent, 0, user); |
| 181 | } catch (RuntimeException | RemoteException e) { |
| 182 | Slog.wtf(TAG, "Bad auto-fill service name " + curService, e); |
| 183 | serviceComponent = null; |
| 184 | serviceInfo = null; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | final AutoFillManagerServiceImpl impl = mImplByUser.get(user); |
| 189 | if (DEBUG) Slog.d(TAG, "Current impl: " + impl + " component: " + serviceComponent |
| 190 | + " info: " + serviceInfo); |
| 191 | |
| 192 | if (force || impl == null || !impl.mComponent.equals(serviceComponent)) { |
| 193 | if (impl != null) { |
| 194 | impl.shutdownLocked(); |
| 195 | } |
| 196 | if (serviceInfo != null) { |
| 197 | final AutoFillManagerServiceImpl newImpl = new AutoFillManagerServiceImpl(mContext, |
| 198 | mLock, mServiceStub, FgThread.getHandler(), user, serviceComponent); |
| 199 | if (DEBUG) Slog.d(TAG, "Setting impl for user " + user + " as: " + newImpl); |
| 200 | mImplByUser.put(user, newImpl); |
| 201 | newImpl.startLocked(); |
| 202 | } else { |
| 203 | if (DEBUG) Slog.d(TAG, "Removing impl for user " + user + ": " + impl); |
| 204 | mImplByUser.remove(user); |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | // TODO: might need to return null instead of throw exception |
| 210 | private AutoFillManagerServiceImpl getImplOrThrowLocked(int userId) { |
| 211 | final AutoFillManagerServiceImpl impl = mImplByUser.get(userId); |
| 212 | if (impl == null) { |
| 213 | throw new IllegalStateException("no auto-fill service for user " + userId); |
| 214 | } |
| 215 | return impl; |
| 216 | } |
| 217 | |
| 218 | final class AutoFillManagerServiceStub extends IAutoFillManagerService.Stub { |
| 219 | |
| 220 | @Override |
Felipe Leme | 29a5b0d | 2016-10-25 14:57:11 -0700 | [diff] [blame^] | 221 | public boolean requestAutoFill(int userId, IBinder activityToken) { |
Felipe Leme | 5381aa4 | 2016-10-13 09:02:32 -0700 | [diff] [blame] | 222 | mContext.enforceCallingPermission(MANAGE_AUTO_FILL, TAG); |
| 223 | |
| 224 | synchronized (mLock) { |
Felipe Leme | 29a5b0d | 2016-10-25 14:57:11 -0700 | [diff] [blame^] | 225 | return getImplOrThrowLocked(userId).requestAutoFill(activityToken); |
Felipe Leme | 5381aa4 | 2016-10-13 09:02:32 -0700 | [diff] [blame] | 226 | } |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| 231 | if (mContext.checkCallingPermission( |
| 232 | Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { |
| 233 | pw.println("Permission Denial: can't dump autofill from from pid=" |
| 234 | + Binder.getCallingPid() |
| 235 | + ", uid=" + Binder.getCallingUid()); |
| 236 | return; |
| 237 | } |
Felipe Leme | 5381aa4 | 2016-10-13 09:02:32 -0700 | [diff] [blame] | 238 | synchronized (mLock) { |
| 239 | pw.print("mEnableService: "); pw.println(mEnableService); |
| 240 | pw.print("mSafeMode: "); pw.println(mSafeMode); |
| 241 | final int size = mImplByUser.size(); |
| 242 | pw.print("Number of implementations: "); |
| 243 | if (size == 0) { |
| 244 | pw.println("none"); |
| 245 | } else { |
| 246 | pw.println(size); |
| 247 | for (int i = 0; i < size; i++) { |
| 248 | pw.print("\nImplementation at index "); pw.println(i); |
| 249 | final AutoFillManagerServiceImpl impl = mImplByUser.valueAt(i); |
| 250 | impl.dumpLocked(" ", pw); |
| 251 | } |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | |
Felipe Leme | 5381aa4 | 2016-10-13 09:02:32 -0700 | [diff] [blame] | 256 | @Override |
| 257 | public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err, |
| 258 | String[] args, ShellCallback callback, ResultReceiver resultReceiver) { |
| 259 | (new AutoFillManagerServiceShellCommand(this)).exec( |
| 260 | this, in, out, err, args, callback, resultReceiver); |
| 261 | } |
| 262 | |
| 263 | } |
| 264 | |
| 265 | private final class SettingsObserver extends ContentObserver { |
| 266 | SettingsObserver(Handler handler) { |
| 267 | super(handler); |
| 268 | ContentResolver resolver = mContext.getContentResolver(); |
| 269 | resolver.registerContentObserver(Settings.Secure.getUriFor( |
| 270 | Settings.Secure.AUTO_FILL_SERVICE), false, this, |
| 271 | UserHandle.USER_ALL); |
| 272 | } |
| 273 | |
| 274 | @Override |
| 275 | public void onChange(boolean selfChange, Uri uri, int userId) { |
| 276 | synchronized (mLock) { |
| 277 | updateImplementationIfNeededLocked(userId, false); |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | } |