TrustManagerService.java revision 10fe83a9b9fd4e9d1a560dfaf6505de7f14f9d67
1/* 2 * Copyright (C) 2014 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 17package com.android.server.trust; 18 19import com.android.internal.annotations.GuardedBy; 20import com.android.internal.content.PackageMonitor; 21import com.android.internal.widget.LockPatternUtils; 22import com.android.server.SystemService; 23 24import org.xmlpull.v1.XmlPullParser; 25import org.xmlpull.v1.XmlPullParserException; 26 27import android.Manifest; 28import android.app.ActivityManager; 29import android.app.admin.DevicePolicyManager; 30import android.app.trust.ITrustListener; 31import android.app.trust.ITrustManager; 32import android.content.BroadcastReceiver; 33import android.content.ComponentName; 34import android.content.Context; 35import android.content.Intent; 36import android.content.IntentFilter; 37import android.content.pm.ApplicationInfo; 38import android.content.pm.PackageManager; 39import android.content.pm.ResolveInfo; 40import android.content.pm.UserInfo; 41import android.content.res.Resources; 42import android.content.res.TypedArray; 43import android.content.res.XmlResourceParser; 44import android.graphics.drawable.Drawable; 45import android.os.Binder; 46import android.os.DeadObjectException; 47import android.os.Handler; 48import android.os.IBinder; 49import android.os.Message; 50import android.os.PersistableBundle; 51import android.os.RemoteException; 52import android.os.SystemClock; 53import android.os.UserHandle; 54import android.os.UserManager; 55import android.provider.Settings; 56import android.service.trust.TrustAgentService; 57import android.util.ArraySet; 58import android.util.AttributeSet; 59import android.util.Log; 60import android.util.Slog; 61import android.util.SparseBooleanArray; 62import android.util.Xml; 63import android.view.IWindowManager; 64import android.view.WindowManagerGlobal; 65 66import java.io.FileDescriptor; 67import java.io.IOException; 68import java.io.PrintWriter; 69import java.util.ArrayList; 70import java.util.List; 71 72/** 73 * Manages trust agents and trust listeners. 74 * 75 * It is responsible for binding to the enabled {@link android.service.trust.TrustAgentService}s 76 * of each user and notifies them about events that are relevant to them. 77 * It start and stops them based on the value of 78 * {@link com.android.internal.widget.LockPatternUtils#getEnabledTrustAgents(int)}. 79 * 80 * It also keeps a set of {@link android.app.trust.ITrustListener}s that are notified whenever the 81 * trust state changes for any user. 82 * 83 * Trust state and the setting of enabled agents is kept per user and each user has its own 84 * instance of a {@link android.service.trust.TrustAgentService}. 85 */ 86public class TrustManagerService extends SystemService { 87 88 private static final boolean DEBUG = false; 89 private static final String TAG = "TrustManagerService"; 90 91 private static final Intent TRUST_AGENT_INTENT = 92 new Intent(TrustAgentService.SERVICE_INTERFACE); 93 private static final String PERMISSION_PROVIDE_AGENT = Manifest.permission.PROVIDE_TRUST_AGENT; 94 95 private static final int MSG_REGISTER_LISTENER = 1; 96 private static final int MSG_UNREGISTER_LISTENER = 2; 97 private static final int MSG_DISPATCH_UNLOCK_ATTEMPT = 3; 98 private static final int MSG_ENABLED_AGENTS_CHANGED = 4; 99 private static final int MSG_REQUIRE_CREDENTIAL_ENTRY = 5; 100 private static final int MSG_KEYGUARD_SHOWING_CHANGED = 6; 101 private static final int MSG_START_USER = 7; 102 private static final int MSG_CLEANUP_USER = 8; 103 private static final int MSG_SWITCH_USER = 9; 104 105 private final ArraySet<AgentInfo> mActiveAgents = new ArraySet<AgentInfo>(); 106 private final ArrayList<ITrustListener> mTrustListeners = new ArrayList<ITrustListener>(); 107 private final Receiver mReceiver = new Receiver(); 108 private final SparseBooleanArray mUserHasAuthenticated = new SparseBooleanArray(); 109 /* package */ final TrustArchive mArchive = new TrustArchive(); 110 private final Context mContext; 111 private final LockPatternUtils mLockPatternUtils; 112 private final UserManager mUserManager; 113 private final ActivityManager mActivityManager; 114 115 @GuardedBy("mUserIsTrusted") 116 private final SparseBooleanArray mUserIsTrusted = new SparseBooleanArray(); 117 118 @GuardedBy("mDeviceLockedForUser") 119 private final SparseBooleanArray mDeviceLockedForUser = new SparseBooleanArray(); 120 121 @GuardedBy("mUserHasAuthenticatedSinceBoot") 122 private final SparseBooleanArray mUserHasAuthenticatedSinceBoot = new SparseBooleanArray(); 123 124 private boolean mTrustAgentsCanRun = false; 125 private int mCurrentUser = UserHandle.USER_SYSTEM; 126 127 public TrustManagerService(Context context) { 128 super(context); 129 mContext = context; 130 mUserManager = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 131 mActivityManager = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE); 132 mLockPatternUtils = new LockPatternUtils(context); 133 } 134 135 @Override 136 public void onStart() { 137 publishBinderService(Context.TRUST_SERVICE, mService); 138 } 139 140 @Override 141 public void onBootPhase(int phase) { 142 if (isSafeMode()) { 143 // No trust agents in safe mode. 144 return; 145 } 146 if (phase == SystemService.PHASE_SYSTEM_SERVICES_READY) { 147 mPackageMonitor.register(mContext, mHandler.getLooper(), UserHandle.ALL, true); 148 mReceiver.register(mContext); 149 } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) { 150 mTrustAgentsCanRun = true; 151 refreshAgentList(UserHandle.USER_ALL); 152 } else if (phase == SystemService.PHASE_BOOT_COMPLETED) { 153 maybeEnableFactoryTrustAgents(mLockPatternUtils, UserHandle.USER_SYSTEM); 154 } 155 } 156 157 // Agent management 158 159 private static final class AgentInfo { 160 CharSequence label; 161 Drawable icon; 162 ComponentName component; // service that implements ITrustAgent 163 ComponentName settings; // setting to launch to modify agent. 164 TrustAgentWrapper agent; 165 int userId; 166 167 @Override 168 public boolean equals(Object other) { 169 if (!(other instanceof AgentInfo)) { 170 return false; 171 } 172 AgentInfo o = (AgentInfo) other; 173 return component.equals(o.component) && userId == o.userId; 174 } 175 176 @Override 177 public int hashCode() { 178 return component.hashCode() * 31 + userId; 179 } 180 } 181 182 private void updateTrustAll() { 183 List<UserInfo> userInfos = mUserManager.getUsers(true /* excludeDying */); 184 for (UserInfo userInfo : userInfos) { 185 updateTrust(userInfo.id, 0); 186 } 187 } 188 189 public void updateTrust(int userId, int flags) { 190 dispatchOnTrustManagedChanged(aggregateIsTrustManaged(userId), userId); 191 boolean trusted = aggregateIsTrusted(userId); 192 boolean changed; 193 synchronized (mUserIsTrusted) { 194 changed = mUserIsTrusted.get(userId) != trusted; 195 mUserIsTrusted.put(userId, trusted); 196 } 197 dispatchOnTrustChanged(trusted, userId, flags); 198 if (changed) { 199 refreshDeviceLockedForUser(userId); 200 } 201 } 202 203 void refreshAgentList(int userId) { 204 if (DEBUG) Slog.d(TAG, "refreshAgentList()"); 205 if (!mTrustAgentsCanRun) { 206 return; 207 } 208 if (userId != UserHandle.USER_ALL && userId < UserHandle.USER_SYSTEM) { 209 Log.e(TAG, "refreshAgentList(userId=" + userId + "): Invalid user handle," 210 + " must be USER_ALL or a specific user.", new Throwable("here")); 211 userId = UserHandle.USER_ALL; 212 } 213 PackageManager pm = mContext.getPackageManager(); 214 215 List<UserInfo> userInfos; 216 if (userId == UserHandle.USER_ALL) { 217 userInfos = mUserManager.getUsers(true /* excludeDying */); 218 } else { 219 userInfos = new ArrayList<>(); 220 userInfos.add(mUserManager.getUserInfo(userId)); 221 } 222 LockPatternUtils lockPatternUtils = mLockPatternUtils; 223 224 ArraySet<AgentInfo> obsoleteAgents = new ArraySet<>(); 225 obsoleteAgents.addAll(mActiveAgents); 226 227 for (UserInfo userInfo : userInfos) { 228 if (userInfo == null || userInfo.partial || !userInfo.isEnabled() 229 || userInfo.guestToRemove) continue; 230 if (!userInfo.supportsSwitchToByUser()) continue; 231 if (!mActivityManager.isUserRunning(userInfo.id)) continue; 232 if (!lockPatternUtils.isSecure(userInfo.id)) continue; 233 if (!getUserHasAuthenticated(userInfo.id)) continue; 234 DevicePolicyManager dpm = lockPatternUtils.getDevicePolicyManager(); 235 int disabledFeatures = dpm.getKeyguardDisabledFeatures(null, userInfo.id); 236 final boolean disableTrustAgents = 237 (disabledFeatures & DevicePolicyManager.KEYGUARD_DISABLE_TRUST_AGENTS) != 0; 238 239 List<ComponentName> enabledAgents = lockPatternUtils.getEnabledTrustAgents(userInfo.id); 240 if (enabledAgents == null) { 241 continue; 242 } 243 List<ResolveInfo> resolveInfos = resolveAllowedTrustAgents(pm, userInfo.id); 244 for (ResolveInfo resolveInfo : resolveInfos) { 245 ComponentName name = getComponentName(resolveInfo); 246 247 if (!enabledAgents.contains(name)) continue; 248 if (disableTrustAgents) { 249 List<PersistableBundle> config = 250 dpm.getTrustAgentConfiguration(null /* admin */, name, userInfo.id); 251 // Disable agent if no features are enabled. 252 if (config == null || config.isEmpty()) continue; 253 } 254 255 AgentInfo agentInfo = new AgentInfo(); 256 agentInfo.component = name; 257 agentInfo.userId = userInfo.id; 258 if (!mActiveAgents.contains(agentInfo)) { 259 agentInfo.label = resolveInfo.loadLabel(pm); 260 agentInfo.icon = resolveInfo.loadIcon(pm); 261 agentInfo.settings = getSettingsComponentName(pm, resolveInfo); 262 agentInfo.agent = new TrustAgentWrapper(mContext, this, 263 new Intent().setComponent(name), userInfo.getUserHandle()); 264 mActiveAgents.add(agentInfo); 265 } else { 266 obsoleteAgents.remove(agentInfo); 267 } 268 } 269 } 270 271 boolean trustMayHaveChanged = false; 272 for (int i = 0; i < obsoleteAgents.size(); i++) { 273 AgentInfo info = obsoleteAgents.valueAt(i); 274 if (userId == UserHandle.USER_ALL || userId == info.userId) { 275 if (info.agent.isManagingTrust()) { 276 trustMayHaveChanged = true; 277 } 278 info.agent.destroy(); 279 mActiveAgents.remove(info); 280 } 281 } 282 283 if (trustMayHaveChanged) { 284 if (userId == UserHandle.USER_ALL) { 285 updateTrustAll(); 286 } else { 287 updateTrust(userId, 0); 288 } 289 } 290 } 291 292 boolean isDeviceLockedInner(int userId) { 293 synchronized (mDeviceLockedForUser) { 294 return mDeviceLockedForUser.get(userId, true); 295 } 296 } 297 298 private void refreshDeviceLockedForUser(int userId) { 299 if (userId != UserHandle.USER_ALL && userId < UserHandle.USER_SYSTEM) { 300 Log.e(TAG, "refreshDeviceLockedForUser(userId=" + userId + "): Invalid user handle," 301 + " must be USER_ALL or a specific user.", new Throwable("here")); 302 userId = UserHandle.USER_ALL; 303 } 304 305 List<UserInfo> userInfos; 306 if (userId == UserHandle.USER_ALL) { 307 userInfos = mUserManager.getUsers(true /* excludeDying */); 308 } else { 309 userInfos = new ArrayList<>(); 310 userInfos.add(mUserManager.getUserInfo(userId)); 311 } 312 313 IWindowManager wm = WindowManagerGlobal.getWindowManagerService(); 314 315 for (int i = 0; i < userInfos.size(); i++) { 316 UserInfo info = userInfos.get(i); 317 318 if (info == null || info.partial || !info.isEnabled() || info.guestToRemove 319 || !info.supportsSwitchToByUser()) { 320 continue; 321 } 322 323 int id = info.id; 324 boolean secure = mLockPatternUtils.isSecure(id); 325 boolean trusted = aggregateIsTrusted(id); 326 boolean showingKeyguard = true; 327 if (mCurrentUser == id) { 328 try { 329 showingKeyguard = wm.isKeyguardLocked(); 330 } catch (RemoteException e) { 331 } 332 } 333 boolean deviceLocked = secure && showingKeyguard && !trusted; 334 335 boolean changed; 336 synchronized (mDeviceLockedForUser) { 337 changed = isDeviceLockedInner(id) != deviceLocked; 338 mDeviceLockedForUser.put(id, deviceLocked); 339 } 340 if (changed) { 341 dispatchDeviceLocked(id, deviceLocked); 342 } 343 } 344 } 345 346 private void dispatchDeviceLocked(int userId, boolean isLocked) { 347 for (int i = 0; i < mActiveAgents.size(); i++) { 348 AgentInfo agent = mActiveAgents.valueAt(i); 349 if (agent.userId == userId) { 350 if (isLocked) { 351 agent.agent.onDeviceLocked(); 352 } else{ 353 agent.agent.onDeviceUnlocked(); 354 } 355 } 356 } 357 } 358 359 void updateDevicePolicyFeatures() { 360 for (int i = 0; i < mActiveAgents.size(); i++) { 361 AgentInfo info = mActiveAgents.valueAt(i); 362 if (info.agent.isConnected()) { 363 info.agent.updateDevicePolicyFeatures(); 364 } 365 } 366 } 367 368 private void removeAgentsOfPackage(String packageName) { 369 boolean trustMayHaveChanged = false; 370 for (int i = mActiveAgents.size() - 1; i >= 0; i--) { 371 AgentInfo info = mActiveAgents.valueAt(i); 372 if (packageName.equals(info.component.getPackageName())) { 373 Log.i(TAG, "Resetting agent " + info.component.flattenToShortString()); 374 if (info.agent.isManagingTrust()) { 375 trustMayHaveChanged = true; 376 } 377 info.agent.destroy(); 378 mActiveAgents.removeAt(i); 379 } 380 } 381 if (trustMayHaveChanged) { 382 updateTrustAll(); 383 } 384 } 385 386 public void resetAgent(ComponentName name, int userId) { 387 boolean trustMayHaveChanged = false; 388 for (int i = mActiveAgents.size() - 1; i >= 0; i--) { 389 AgentInfo info = mActiveAgents.valueAt(i); 390 if (name.equals(info.component) && userId == info.userId) { 391 Log.i(TAG, "Resetting agent " + info.component.flattenToShortString()); 392 if (info.agent.isManagingTrust()) { 393 trustMayHaveChanged = true; 394 } 395 info.agent.destroy(); 396 mActiveAgents.removeAt(i); 397 } 398 } 399 if (trustMayHaveChanged) { 400 updateTrust(userId, 0); 401 } 402 refreshAgentList(userId); 403 } 404 405 private ComponentName getSettingsComponentName(PackageManager pm, ResolveInfo resolveInfo) { 406 if (resolveInfo == null || resolveInfo.serviceInfo == null 407 || resolveInfo.serviceInfo.metaData == null) return null; 408 String cn = null; 409 XmlResourceParser parser = null; 410 Exception caughtException = null; 411 try { 412 parser = resolveInfo.serviceInfo.loadXmlMetaData(pm, 413 TrustAgentService.TRUST_AGENT_META_DATA); 414 if (parser == null) { 415 Slog.w(TAG, "Can't find " + TrustAgentService.TRUST_AGENT_META_DATA + " meta-data"); 416 return null; 417 } 418 Resources res = pm.getResourcesForApplication(resolveInfo.serviceInfo.applicationInfo); 419 AttributeSet attrs = Xml.asAttributeSet(parser); 420 int type; 421 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 422 && type != XmlPullParser.START_TAG) { 423 // Drain preamble. 424 } 425 String nodeName = parser.getName(); 426 if (!"trust-agent".equals(nodeName)) { 427 Slog.w(TAG, "Meta-data does not start with trust-agent tag"); 428 return null; 429 } 430 TypedArray sa = res 431 .obtainAttributes(attrs, com.android.internal.R.styleable.TrustAgent); 432 cn = sa.getString(com.android.internal.R.styleable.TrustAgent_settingsActivity); 433 sa.recycle(); 434 } catch (PackageManager.NameNotFoundException e) { 435 caughtException = e; 436 } catch (IOException e) { 437 caughtException = e; 438 } catch (XmlPullParserException e) { 439 caughtException = e; 440 } finally { 441 if (parser != null) parser.close(); 442 } 443 if (caughtException != null) { 444 Slog.w(TAG, "Error parsing : " + resolveInfo.serviceInfo.packageName, caughtException); 445 return null; 446 } 447 if (cn == null) { 448 return null; 449 } 450 if (cn.indexOf('/') < 0) { 451 cn = resolveInfo.serviceInfo.packageName + "/" + cn; 452 } 453 return ComponentName.unflattenFromString(cn); 454 } 455 456 private ComponentName getComponentName(ResolveInfo resolveInfo) { 457 if (resolveInfo == null || resolveInfo.serviceInfo == null) return null; 458 return new ComponentName(resolveInfo.serviceInfo.packageName, resolveInfo.serviceInfo.name); 459 } 460 461 private void maybeEnableFactoryTrustAgents(LockPatternUtils utils, int userId) { 462 if (0 != Settings.Secure.getIntForUser(mContext.getContentResolver(), 463 Settings.Secure.TRUST_AGENTS_INITIALIZED, 0, userId)) { 464 return; 465 } 466 PackageManager pm = mContext.getPackageManager(); 467 List<ResolveInfo> resolveInfos = resolveAllowedTrustAgents(pm, userId); 468 ArraySet<ComponentName> discoveredAgents = new ArraySet<>(); 469 for (ResolveInfo resolveInfo : resolveInfos) { 470 ComponentName componentName = getComponentName(resolveInfo); 471 int applicationInfoFlags = resolveInfo.serviceInfo.applicationInfo.flags; 472 if ((applicationInfoFlags & ApplicationInfo.FLAG_SYSTEM) == 0) { 473 Log.i(TAG, "Leaving agent " + componentName + " disabled because package " 474 + "is not a system package."); 475 continue; 476 } 477 discoveredAgents.add(componentName); 478 } 479 480 List<ComponentName> previouslyEnabledAgents = utils.getEnabledTrustAgents(userId); 481 if (previouslyEnabledAgents != null) { 482 discoveredAgents.addAll(previouslyEnabledAgents); 483 } 484 utils.setEnabledTrustAgents(discoveredAgents, userId); 485 Settings.Secure.putIntForUser(mContext.getContentResolver(), 486 Settings.Secure.TRUST_AGENTS_INITIALIZED, 1, userId); 487 } 488 489 private List<ResolveInfo> resolveAllowedTrustAgents(PackageManager pm, int userId) { 490 List<ResolveInfo> resolveInfos = pm.queryIntentServicesAsUser(TRUST_AGENT_INTENT, 491 0 /* flags */, userId); 492 ArrayList<ResolveInfo> allowedAgents = new ArrayList<>(resolveInfos.size()); 493 for (ResolveInfo resolveInfo : resolveInfos) { 494 if (resolveInfo.serviceInfo == null) continue; 495 if (resolveInfo.serviceInfo.applicationInfo == null) continue; 496 String packageName = resolveInfo.serviceInfo.packageName; 497 if (pm.checkPermission(PERMISSION_PROVIDE_AGENT, packageName) 498 != PackageManager.PERMISSION_GRANTED) { 499 ComponentName name = getComponentName(resolveInfo); 500 Log.w(TAG, "Skipping agent " + name + " because package does not have" 501 + " permission " + PERMISSION_PROVIDE_AGENT + "."); 502 continue; 503 } 504 allowedAgents.add(resolveInfo); 505 } 506 return allowedAgents; 507 } 508 509 // Agent dispatch and aggregation 510 511 private boolean aggregateIsTrusted(int userId) { 512 if (!getUserHasAuthenticated(userId)) { 513 return false; 514 } 515 for (int i = 0; i < mActiveAgents.size(); i++) { 516 AgentInfo info = mActiveAgents.valueAt(i); 517 if (info.userId == userId) { 518 if (info.agent.isTrusted()) { 519 return true; 520 } 521 } 522 } 523 return false; 524 } 525 526 private boolean aggregateIsTrustManaged(int userId) { 527 if (!getUserHasAuthenticated(userId)) { 528 return false; 529 } 530 for (int i = 0; i < mActiveAgents.size(); i++) { 531 AgentInfo info = mActiveAgents.valueAt(i); 532 if (info.userId == userId) { 533 if (info.agent.isManagingTrust()) { 534 return true; 535 } 536 } 537 } 538 return false; 539 } 540 541 private void dispatchUnlockAttempt(boolean successful, int userId) { 542 for (int i = 0; i < mActiveAgents.size(); i++) { 543 AgentInfo info = mActiveAgents.valueAt(i); 544 if (info.userId == userId) { 545 info.agent.onUnlockAttempt(successful); 546 } 547 } 548 549 if (successful) { 550 updateUserHasAuthenticated(userId); 551 } 552 } 553 554 private void updateUserHasAuthenticated(int userId) { 555 boolean changed = setUserHasAuthenticated(userId); 556 if (changed) { 557 refreshAgentList(userId); 558 } 559 } 560 561 private boolean getUserHasAuthenticated(int userId) { 562 return mUserHasAuthenticated.get(userId); 563 } 564 565 /** 566 * @return whether the value has changed 567 */ 568 private boolean setUserHasAuthenticated(int userId) { 569 if (!mUserHasAuthenticated.get(userId)) { 570 mUserHasAuthenticated.put(userId, true); 571 synchronized (mUserHasAuthenticatedSinceBoot) { 572 mUserHasAuthenticatedSinceBoot.put(userId, true); 573 } 574 return true; 575 } 576 return false; 577 } 578 579 private void clearUserHasAuthenticated(int userId) { 580 if (userId == UserHandle.USER_ALL) { 581 mUserHasAuthenticated.clear(); 582 } else { 583 mUserHasAuthenticated.put(userId, false); 584 } 585 } 586 587 private boolean getUserHasAuthenticatedSinceBoot(int userId) { 588 synchronized (mUserHasAuthenticatedSinceBoot) { 589 return mUserHasAuthenticatedSinceBoot.get(userId); 590 } 591 } 592 593 private void requireCredentialEntry(int userId) { 594 clearUserHasAuthenticated(userId); 595 refreshAgentList(userId); 596 } 597 598 // Listeners 599 600 private void addListener(ITrustListener listener) { 601 for (int i = 0; i < mTrustListeners.size(); i++) { 602 if (mTrustListeners.get(i).asBinder() == listener.asBinder()) { 603 return; 604 } 605 } 606 mTrustListeners.add(listener); 607 updateTrustAll(); 608 } 609 610 private void removeListener(ITrustListener listener) { 611 for (int i = 0; i < mTrustListeners.size(); i++) { 612 if (mTrustListeners.get(i).asBinder() == listener.asBinder()) { 613 mTrustListeners.remove(i); 614 return; 615 } 616 } 617 } 618 619 private void dispatchOnTrustChanged(boolean enabled, int userId, int flags) { 620 if (!enabled) flags = 0; 621 for (int i = 0; i < mTrustListeners.size(); i++) { 622 try { 623 mTrustListeners.get(i).onTrustChanged(enabled, userId, flags); 624 } catch (DeadObjectException e) { 625 Slog.d(TAG, "Removing dead TrustListener."); 626 mTrustListeners.remove(i); 627 i--; 628 } catch (RemoteException e) { 629 Slog.e(TAG, "Exception while notifying TrustListener.", e); 630 } 631 } 632 } 633 634 private void dispatchOnTrustManagedChanged(boolean managed, int userId) { 635 for (int i = 0; i < mTrustListeners.size(); i++) { 636 try { 637 mTrustListeners.get(i).onTrustManagedChanged(managed, userId); 638 } catch (DeadObjectException e) { 639 Slog.d(TAG, "Removing dead TrustListener."); 640 mTrustListeners.remove(i); 641 i--; 642 } catch (RemoteException e) { 643 Slog.e(TAG, "Exception while notifying TrustListener.", e); 644 } 645 } 646 } 647 648 // User lifecycle 649 650 @Override 651 public void onStartUser(int userId) { 652 mHandler.obtainMessage(MSG_START_USER, userId, 0, null).sendToTarget(); 653 } 654 655 @Override 656 public void onCleanupUser(int userId) { 657 mHandler.obtainMessage(MSG_CLEANUP_USER, userId, 0, null).sendToTarget(); 658 } 659 660 @Override 661 public void onSwitchUser(int userId) { 662 mHandler.obtainMessage(MSG_SWITCH_USER, userId, 0, null).sendToTarget(); 663 } 664 665 // Plumbing 666 667 private final IBinder mService = new ITrustManager.Stub() { 668 @Override 669 public void reportUnlockAttempt(boolean authenticated, int userId) throws RemoteException { 670 enforceReportPermission(); 671 mHandler.obtainMessage(MSG_DISPATCH_UNLOCK_ATTEMPT, authenticated ? 1 : 0, userId) 672 .sendToTarget(); 673 } 674 675 @Override 676 public void reportEnabledTrustAgentsChanged(int userId) throws RemoteException { 677 enforceReportPermission(); 678 // coalesce refresh messages. 679 mHandler.removeMessages(MSG_ENABLED_AGENTS_CHANGED); 680 mHandler.sendEmptyMessage(MSG_ENABLED_AGENTS_CHANGED); 681 } 682 683 @Override 684 public void reportRequireCredentialEntry(int userId) throws RemoteException { 685 enforceReportPermission(); 686 if (userId == UserHandle.USER_ALL || userId >= UserHandle.USER_SYSTEM) { 687 mHandler.obtainMessage(MSG_REQUIRE_CREDENTIAL_ENTRY, userId, 0).sendToTarget(); 688 } else { 689 throw new IllegalArgumentException( 690 "userId must be an explicit user id or USER_ALL"); 691 } 692 } 693 694 @Override 695 public void reportKeyguardShowingChanged() throws RemoteException { 696 enforceReportPermission(); 697 // coalesce refresh messages. 698 mHandler.removeMessages(MSG_KEYGUARD_SHOWING_CHANGED); 699 mHandler.sendEmptyMessage(MSG_KEYGUARD_SHOWING_CHANGED); 700 } 701 702 @Override 703 public void registerTrustListener(ITrustListener trustListener) throws RemoteException { 704 enforceListenerPermission(); 705 mHandler.obtainMessage(MSG_REGISTER_LISTENER, trustListener).sendToTarget(); 706 } 707 708 @Override 709 public void unregisterTrustListener(ITrustListener trustListener) throws RemoteException { 710 enforceListenerPermission(); 711 mHandler.obtainMessage(MSG_UNREGISTER_LISTENER, trustListener).sendToTarget(); 712 } 713 714 @Override 715 public boolean isDeviceLocked(int userId) throws RemoteException { 716 userId = ActivityManager.handleIncomingUser(getCallingPid(), getCallingUid(), userId, 717 false /* allowAll */, true /* requireFull */, "isDeviceLocked", null); 718 userId = resolveProfileParent(userId); 719 720 return isDeviceLockedInner(userId); 721 } 722 723 @Override 724 public boolean isDeviceSecure(int userId) throws RemoteException { 725 userId = ActivityManager.handleIncomingUser(getCallingPid(), getCallingUid(), userId, 726 false /* allowAll */, true /* requireFull */, "isDeviceSecure", null); 727 userId = resolveProfileParent(userId); 728 729 long token = Binder.clearCallingIdentity(); 730 try { 731 return new LockPatternUtils(mContext).isSecure(userId); 732 } finally { 733 Binder.restoreCallingIdentity(token); 734 } 735 } 736 737 @Override 738 public boolean hasUserAuthenticatedSinceBoot(int userId) throws RemoteException { 739 mContext.enforceCallingOrSelfPermission( 740 Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE, null); 741 long token = Binder.clearCallingIdentity(); 742 try { 743 return getUserHasAuthenticatedSinceBoot(userId); 744 } finally { 745 Binder.restoreCallingIdentity(token); 746 } 747 } 748 749 private void enforceReportPermission() { 750 mContext.enforceCallingOrSelfPermission( 751 Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE, "reporting trust events"); 752 } 753 754 private void enforceListenerPermission() { 755 mContext.enforceCallingPermission(Manifest.permission.TRUST_LISTENER, 756 "register trust listener"); 757 } 758 759 @Override 760 protected void dump(FileDescriptor fd, final PrintWriter fout, String[] args) { 761 mContext.enforceCallingPermission(Manifest.permission.DUMP, 762 "dumping TrustManagerService"); 763 if (isSafeMode()) { 764 fout.println("disabled because the system is in safe mode."); 765 return; 766 } 767 if (!mTrustAgentsCanRun) { 768 fout.println("disabled because the third-party apps can't run yet."); 769 return; 770 } 771 final List<UserInfo> userInfos = mUserManager.getUsers(true /* excludeDying */); 772 mHandler.runWithScissors(new Runnable() { 773 @Override 774 public void run() { 775 fout.println("Trust manager state:"); 776 for (UserInfo user : userInfos) { 777 dumpUser(fout, user, user.id == mCurrentUser); 778 } 779 } 780 }, 1500); 781 } 782 783 private void dumpUser(PrintWriter fout, UserInfo user, boolean isCurrent) { 784 fout.printf(" User \"%s\" (id=%d, flags=%#x)", 785 user.name, user.id, user.flags); 786 if (!user.supportsSwitchToByUser()) { 787 fout.println("(managed profile)"); 788 fout.println(" disabled because switching to this user is not possible."); 789 return; 790 } 791 if (isCurrent) { 792 fout.print(" (current)"); 793 } 794 fout.print(": trusted=" + dumpBool(aggregateIsTrusted(user.id))); 795 fout.print(", trustManaged=" + dumpBool(aggregateIsTrustManaged(user.id))); 796 fout.print(", deviceLocked=" + dumpBool(isDeviceLockedInner(user.id))); 797 fout.print(", hasAuthenticated=" + dumpBool(getUserHasAuthenticated(user.id))); 798 fout.print(", hasAuthenticatedSinceBoot=" 799 + dumpBool(getUserHasAuthenticatedSinceBoot(user.id))); 800 fout.println(); 801 fout.println(" Enabled agents:"); 802 boolean duplicateSimpleNames = false; 803 ArraySet<String> simpleNames = new ArraySet<String>(); 804 for (AgentInfo info : mActiveAgents) { 805 if (info.userId != user.id) { continue; } 806 boolean trusted = info.agent.isTrusted(); 807 fout.print(" "); fout.println(info.component.flattenToShortString()); 808 fout.print(" bound=" + dumpBool(info.agent.isBound())); 809 fout.print(", connected=" + dumpBool(info.agent.isConnected())); 810 fout.print(", managingTrust=" + dumpBool(info.agent.isManagingTrust())); 811 fout.print(", trusted=" + dumpBool(trusted)); 812 fout.println(); 813 if (trusted) { 814 fout.println(" message=\"" + info.agent.getMessage() + "\""); 815 } 816 if (!info.agent.isConnected()) { 817 String restartTime = TrustArchive.formatDuration( 818 info.agent.getScheduledRestartUptimeMillis() 819 - SystemClock.uptimeMillis()); 820 fout.println(" restartScheduledAt=" + restartTime); 821 } 822 if (!simpleNames.add(TrustArchive.getSimpleName(info.component))) { 823 duplicateSimpleNames = true; 824 } 825 } 826 fout.println(" Events:"); 827 mArchive.dump(fout, 50, user.id, " " /* linePrefix */, duplicateSimpleNames); 828 fout.println(); 829 } 830 831 private String dumpBool(boolean b) { 832 return b ? "1" : "0"; 833 } 834 }; 835 836 private int resolveProfileParent(int userId) { 837 long identity = Binder.clearCallingIdentity(); 838 try { 839 UserInfo parent = mUserManager.getProfileParent(userId); 840 if (parent != null) { 841 return parent.getUserHandle().getIdentifier(); 842 } 843 return userId; 844 } finally { 845 Binder.restoreCallingIdentity(identity); 846 } 847 } 848 849 private final Handler mHandler = new Handler() { 850 @Override 851 public void handleMessage(Message msg) { 852 switch (msg.what) { 853 case MSG_REGISTER_LISTENER: 854 addListener((ITrustListener) msg.obj); 855 break; 856 case MSG_UNREGISTER_LISTENER: 857 removeListener((ITrustListener) msg.obj); 858 break; 859 case MSG_DISPATCH_UNLOCK_ATTEMPT: 860 dispatchUnlockAttempt(msg.arg1 != 0, msg.arg2); 861 break; 862 case MSG_ENABLED_AGENTS_CHANGED: 863 refreshAgentList(UserHandle.USER_ALL); 864 // This is also called when the security mode of a user changes. 865 refreshDeviceLockedForUser(UserHandle.USER_ALL); 866 break; 867 case MSG_REQUIRE_CREDENTIAL_ENTRY: 868 requireCredentialEntry(msg.arg1); 869 break; 870 case MSG_KEYGUARD_SHOWING_CHANGED: 871 refreshDeviceLockedForUser(mCurrentUser); 872 break; 873 case MSG_START_USER: 874 case MSG_CLEANUP_USER: 875 refreshAgentList(msg.arg1); 876 break; 877 case MSG_SWITCH_USER: 878 mCurrentUser = msg.arg1; 879 refreshDeviceLockedForUser(UserHandle.USER_ALL); 880 break; 881 } 882 } 883 }; 884 885 private final PackageMonitor mPackageMonitor = new PackageMonitor() { 886 @Override 887 public void onSomePackagesChanged() { 888 refreshAgentList(UserHandle.USER_ALL); 889 } 890 891 @Override 892 public boolean onPackageChanged(String packageName, int uid, String[] components) { 893 // We're interested in all changes, even if just some components get enabled / disabled. 894 return true; 895 } 896 897 @Override 898 public void onPackageDisappeared(String packageName, int reason) { 899 removeAgentsOfPackage(packageName); 900 } 901 }; 902 903 private class Receiver extends BroadcastReceiver { 904 905 @Override 906 public void onReceive(Context context, Intent intent) { 907 String action = intent.getAction(); 908 if (DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED.equals(action)) { 909 refreshAgentList(getSendingUserId()); 910 updateDevicePolicyFeatures(); 911 } else if (Intent.ACTION_USER_PRESENT.equals(action)) { 912 updateUserHasAuthenticated(getSendingUserId()); 913 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 914 int userId = getUserId(intent); 915 if (userId > 0) { 916 maybeEnableFactoryTrustAgents(mLockPatternUtils, userId); 917 } 918 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 919 int userId = getUserId(intent); 920 if (userId > 0) { 921 mUserHasAuthenticated.delete(userId); 922 synchronized (mUserIsTrusted) { 923 mUserIsTrusted.delete(userId); 924 } 925 synchronized (mDeviceLockedForUser) { 926 mDeviceLockedForUser.delete(userId); 927 } 928 refreshAgentList(userId); 929 refreshDeviceLockedForUser(userId); 930 } 931 } 932 } 933 934 private int getUserId(Intent intent) { 935 int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, -100); 936 if (userId > 0) { 937 return userId; 938 } else { 939 Slog.wtf(TAG, "EXTRA_USER_HANDLE missing or invalid, value=" + userId); 940 return -100; 941 } 942 } 943 944 public void register(Context context) { 945 IntentFilter filter = new IntentFilter(); 946 filter.addAction(DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED); 947 filter.addAction(Intent.ACTION_USER_PRESENT); 948 filter.addAction(Intent.ACTION_USER_ADDED); 949 filter.addAction(Intent.ACTION_USER_REMOVED); 950 context.registerReceiverAsUser(this, 951 UserHandle.ALL, 952 filter, 953 null /* permission */, 954 null /* scheduler */); 955 } 956 } 957} 958