| /** |
| * Copyright (C) 2014 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.fingerprint; |
| |
| import android.Manifest; |
| import android.app.ActivityManager; |
| import android.app.ActivityManager.RunningAppProcessInfo; |
| import android.app.ActivityManagerNative; |
| import android.app.AlarmManager; |
| import android.app.AppOpsManager; |
| import android.app.PendingIntent; |
| import android.app.SynchronousUserSwitchObserver; |
| import android.content.ComponentName; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| import android.content.pm.UserInfo; |
| import android.hardware.fingerprint.IFingerprintServiceLockoutResetCallback; |
| import android.os.Binder; |
| import android.os.DeadObjectException; |
| import android.os.Environment; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.PowerManager; |
| import android.os.RemoteException; |
| import android.os.SELinux; |
| import android.os.ServiceManager; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.util.Slog; |
| |
| import com.android.internal.logging.MetricsLogger; |
| import com.android.server.SystemService; |
| |
| import org.json.JSONArray; |
| import org.json.JSONException; |
| import org.json.JSONObject; |
| |
| import android.hardware.fingerprint.Fingerprint; |
| import android.hardware.fingerprint.FingerprintManager; |
| import android.hardware.fingerprint.IFingerprintService; |
| import android.hardware.fingerprint.IFingerprintDaemon; |
| import android.hardware.fingerprint.IFingerprintDaemonCallback; |
| import android.hardware.fingerprint.IFingerprintServiceReceiver; |
| |
| import static android.Manifest.permission.INTERACT_ACROSS_USERS; |
| import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND; |
| import static android.Manifest.permission.MANAGE_FINGERPRINT; |
| import static android.Manifest.permission.RESET_FINGERPRINT_LOCKOUT; |
| import static android.Manifest.permission.USE_FINGERPRINT; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * A service to manage multiple clients that want to access the fingerprint HAL API. |
| * The service is responsible for maintaining a list of clients and dispatching all |
| * fingerprint -related events. |
| * |
| * @hide |
| */ |
| public class FingerprintService extends SystemService implements IBinder.DeathRecipient { |
| static final String TAG = "FingerprintService"; |
| static final boolean DEBUG = true; |
| private static final String FP_DATA_DIR = "fpdata"; |
| private static final String FINGERPRINTD = "android.hardware.fingerprint.IFingerprintDaemon"; |
| private static final int MSG_USER_SWITCHING = 10; |
| private static final String ACTION_LOCKOUT_RESET = |
| "com.android.server.fingerprint.ACTION_LOCKOUT_RESET"; |
| |
| private final ArrayList<FingerprintServiceLockoutResetMonitor> mLockoutMonitors = |
| new ArrayList<>(); |
| private final AppOpsManager mAppOps; |
| |
| private static final long FAIL_LOCKOUT_TIMEOUT_MS = 30*1000; |
| private static final int MAX_FAILED_ATTEMPTS = 5; |
| private static final long CANCEL_TIMEOUT_LIMIT = 3000; // max wait for onCancel() from HAL,in ms |
| private final String mKeyguardPackage; |
| private int mCurrentUserId = UserHandle.USER_CURRENT; |
| private final FingerprintUtils mFingerprintUtils = FingerprintUtils.getInstance(); |
| private Context mContext; |
| private long mHalDeviceId; |
| private int mFailedAttempts; |
| private IFingerprintDaemon mDaemon; |
| private final PowerManager mPowerManager; |
| private final AlarmManager mAlarmManager; |
| private final UserManager mUserManager; |
| private ClientMonitor mCurrentClient; |
| private ClientMonitor mPendingClient; |
| private long mCurrentAuthenticatorId; |
| |
| private Handler mHandler = new Handler() { |
| @Override |
| public void handleMessage(android.os.Message msg) { |
| switch (msg.what) { |
| case MSG_USER_SWITCHING: |
| handleUserSwitching(msg.arg1); |
| break; |
| |
| default: |
| Slog.w(TAG, "Unknown message:" + msg.what); |
| } |
| } |
| }; |
| |
| private final BroadcastReceiver mLockoutReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (ACTION_LOCKOUT_RESET.equals(intent.getAction())) { |
| resetFailedAttempts(); |
| } |
| } |
| }; |
| |
| private final Runnable mResetFailedAttemptsRunnable = new Runnable() { |
| @Override |
| public void run() { |
| resetFailedAttempts(); |
| } |
| }; |
| |
| private final Runnable mResetClientState = new Runnable() { |
| @Override |
| public void run() { |
| // Warning: if we get here, the driver never confirmed our call to cancel the current |
| // operation (authenticate, enroll, remove, enumerate, etc), which is |
| // really bad. The result will be a 3-second delay in starting each new client. |
| // If you see this on a device, make certain the driver notifies with |
| // {@link FingerprintManager#FINGERPRINT_ERROR_CANCEL} in response to cancel() |
| // once it has successfully switched to the IDLE state in the fingerprint HAL. |
| // Additionally,{@link FingerprintManager#FINGERPRINT_ERROR_CANCEL} should only be sent |
| // in response to an actual cancel() call. |
| Slog.w(TAG, "Client " |
| + (mCurrentClient != null ? mCurrentClient.getOwnerString() : "null") |
| + " failed to respond to cancel, starting client " |
| + (mPendingClient != null ? mPendingClient.getOwnerString() : "null")); |
| mCurrentClient = null; |
| startClient(mPendingClient, false); |
| } |
| }; |
| |
| public FingerprintService(Context context) { |
| super(context); |
| mContext = context; |
| mKeyguardPackage = ComponentName.unflattenFromString(context.getResources().getString( |
| com.android.internal.R.string.config_keyguardComponent)).getPackageName(); |
| mAppOps = context.getSystemService(AppOpsManager.class); |
| mPowerManager = mContext.getSystemService(PowerManager.class); |
| mAlarmManager = mContext.getSystemService(AlarmManager.class); |
| mContext.registerReceiver(mLockoutReceiver, new IntentFilter(ACTION_LOCKOUT_RESET), |
| RESET_FINGERPRINT_LOCKOUT, null /* handler */); |
| mUserManager = UserManager.get(mContext); |
| } |
| |
| @Override |
| public void binderDied() { |
| Slog.v(TAG, "fingerprintd died"); |
| mDaemon = null; |
| handleError(mHalDeviceId, FingerprintManager.FINGERPRINT_ERROR_HW_UNAVAILABLE); |
| } |
| |
| public IFingerprintDaemon getFingerprintDaemon() { |
| if (mDaemon == null) { |
| mDaemon = IFingerprintDaemon.Stub.asInterface(ServiceManager.getService(FINGERPRINTD)); |
| if (mDaemon != null) { |
| try { |
| mDaemon.asBinder().linkToDeath(this, 0); |
| mDaemon.init(mDaemonCallback); |
| mHalDeviceId = mDaemon.openHal(); |
| if (mHalDeviceId != 0) { |
| updateActiveGroup(ActivityManager.getCurrentUser(), null); |
| } else { |
| Slog.w(TAG, "Failed to open Fingerprint HAL!"); |
| mDaemon = null; |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failed to open fingeprintd HAL", e); |
| mDaemon = null; // try again later! |
| } |
| } else { |
| Slog.w(TAG, "fingerprint service not available"); |
| } |
| } |
| return mDaemon; |
| } |
| |
| protected void handleEnumerate(long deviceId, int[] fingerIds, int[] groupIds) { |
| if (fingerIds.length != groupIds.length) { |
| Slog.w(TAG, "fingerIds and groupIds differ in length: f[]=" |
| + Arrays.toString(fingerIds) + ", g[]=" + Arrays.toString(groupIds)); |
| return; |
| } |
| if (DEBUG) Slog.w(TAG, "Enumerate: f[]=" + fingerIds + ", g[]=" + groupIds); |
| // TODO: update fingerprint/name pairs |
| } |
| |
| protected void handleError(long deviceId, int error) { |
| ClientMonitor client = mCurrentClient; |
| if (client != null && client.onError(error)) { |
| removeClient(client); |
| } |
| if (DEBUG) Slog.v(TAG, "handleError(client=" |
| + (client != null ? client.getOwnerString() : "null") + ", error = " + error + ")"); |
| // This is the magic code that starts the next client when the old client finishes. |
| if (error == FingerprintManager.FINGERPRINT_ERROR_CANCELED) { |
| mHandler.removeCallbacks(mResetClientState); |
| if (mPendingClient != null) { |
| if (DEBUG) Slog.v(TAG, "start pending client " + mPendingClient.getOwnerString()); |
| startClient(mPendingClient, false); |
| mPendingClient = null; |
| } |
| } |
| } |
| |
| protected void handleRemoved(long deviceId, int fingerId, int groupId) { |
| ClientMonitor client = mCurrentClient; |
| if (client != null && client.onRemoved(fingerId, groupId)) { |
| removeClient(client); |
| } |
| } |
| |
| protected void handleAuthenticated(long deviceId, int fingerId, int groupId) { |
| ClientMonitor client = mCurrentClient; |
| if (client != null && client.onAuthenticated(fingerId, groupId)) { |
| removeClient(client); |
| } |
| } |
| |
| protected void handleAcquired(long deviceId, int acquiredInfo) { |
| ClientMonitor client = mCurrentClient; |
| if (client != null && client.onAcquired(acquiredInfo)) { |
| removeClient(client); |
| } |
| } |
| |
| protected void handleEnrollResult(long deviceId, int fingerId, int groupId, int remaining) { |
| ClientMonitor client = mCurrentClient; |
| if (client != null && client.onEnrollResult(fingerId, groupId, remaining)) { |
| removeClient(client); |
| } |
| } |
| |
| private void userActivity() { |
| long now = SystemClock.uptimeMillis(); |
| mPowerManager.userActivity(now, PowerManager.USER_ACTIVITY_EVENT_TOUCH, 0); |
| } |
| |
| void handleUserSwitching(int userId) { |
| updateActiveGroup(userId, null); |
| } |
| |
| private void removeClient(ClientMonitor client) { |
| if (client != null) { |
| client.destroy(); |
| if (client != mCurrentClient && mCurrentClient != null) { |
| Slog.w(TAG, "Unexpected client: " + client.getOwnerString() + "expected: " |
| + mCurrentClient != null ? mCurrentClient.getOwnerString() : "null"); |
| } |
| } |
| if (mCurrentClient != null) { |
| if (DEBUG) Slog.v(TAG, "Done with client: " + client.getOwnerString()); |
| mCurrentClient = null; |
| } |
| } |
| |
| private boolean inLockoutMode() { |
| return mFailedAttempts >= MAX_FAILED_ATTEMPTS; |
| } |
| |
| private void scheduleLockoutReset() { |
| mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, |
| SystemClock.elapsedRealtime() + FAIL_LOCKOUT_TIMEOUT_MS, getLockoutResetIntent()); |
| } |
| |
| private void cancelLockoutReset() { |
| mAlarmManager.cancel(getLockoutResetIntent()); |
| } |
| |
| private PendingIntent getLockoutResetIntent() { |
| return PendingIntent.getBroadcast(mContext, 0, |
| new Intent(ACTION_LOCKOUT_RESET), PendingIntent.FLAG_UPDATE_CURRENT); |
| } |
| |
| public long startPreEnroll(IBinder token) { |
| IFingerprintDaemon daemon = getFingerprintDaemon(); |
| if (daemon == null) { |
| Slog.w(TAG, "startPreEnroll: no fingeprintd!"); |
| return 0; |
| } |
| try { |
| return daemon.preEnroll(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "startPreEnroll failed", e); |
| } |
| return 0; |
| } |
| |
| public int startPostEnroll(IBinder token) { |
| IFingerprintDaemon daemon = getFingerprintDaemon(); |
| if (daemon == null) { |
| Slog.w(TAG, "startPostEnroll: no fingeprintd!"); |
| return 0; |
| } |
| try { |
| return daemon.postEnroll(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "startPostEnroll failed", e); |
| } |
| return 0; |
| } |
| |
| /** |
| * Calls fingerprintd to switch states to the new task. If there's already a current task, |
| * it calls cancel() and sets mPendingClient to begin when the current task finishes |
| * ({@link FingerprintManager#FINGERPRINT_ERROR_CANCELED}). |
| * @param newClient the new client that wants to connect |
| * @param initiatedByClient true for authenticate, remove and enroll |
| */ |
| private void startClient(ClientMonitor newClient, boolean initiatedByClient) { |
| ClientMonitor currentClient = mCurrentClient; |
| if (currentClient != null) { |
| if (DEBUG) Slog.v(TAG, "request stop current client " + currentClient.getOwnerString()); |
| currentClient.stop(initiatedByClient); |
| mPendingClient = newClient; |
| mHandler.removeCallbacks(mResetClientState); |
| mHandler.postDelayed(mResetClientState, CANCEL_TIMEOUT_LIMIT); |
| } else if (newClient != null) { |
| mCurrentClient = newClient; |
| if (DEBUG) Slog.v(TAG, "starting client " |
| + newClient.getClass().getSuperclass().getSimpleName() |
| + "(" + newClient.getOwnerString() + ")" |
| + ", initiatedByClient = " + initiatedByClient + ")"); |
| newClient.start(); |
| } |
| } |
| |
| void startRemove(IBinder token, int fingerId, int groupId, int userId, |
| IFingerprintServiceReceiver receiver, boolean restricted) { |
| IFingerprintDaemon daemon = getFingerprintDaemon(); |
| if (daemon == null) { |
| Slog.w(TAG, "startRemove: no fingeprintd!"); |
| return; |
| } |
| RemovalClient client = new RemovalClient(getContext(), mHalDeviceId, token, |
| receiver, fingerId, groupId, userId, restricted, token.toString()) { |
| @Override |
| public void notifyUserActivity() { |
| FingerprintService.this.userActivity(); |
| } |
| |
| @Override |
| public IFingerprintDaemon getFingerprintDaemon() { |
| return FingerprintService.this.getFingerprintDaemon(); |
| } |
| }; |
| startClient(client, true); |
| } |
| |
| public List<Fingerprint> getEnrolledFingerprints(int userId) { |
| return mFingerprintUtils.getFingerprintsForUser(mContext, userId); |
| } |
| |
| public boolean hasEnrolledFingerprints(int userId) { |
| if (userId != UserHandle.getCallingUserId()) { |
| checkPermission(INTERACT_ACROSS_USERS); |
| } |
| return mFingerprintUtils.getFingerprintsForUser(mContext, userId).size() > 0; |
| } |
| |
| boolean hasPermission(String permission) { |
| return getContext().checkCallingOrSelfPermission(permission) |
| == PackageManager.PERMISSION_GRANTED; |
| } |
| |
| void checkPermission(String permission) { |
| getContext().enforceCallingOrSelfPermission(permission, |
| "Must have " + permission + " permission."); |
| } |
| |
| int getEffectiveUserId(int userId) { |
| UserManager um = UserManager.get(mContext); |
| if (um != null) { |
| final long callingIdentity = Binder.clearCallingIdentity(); |
| userId = um.getCredentialOwnerProfile(userId); |
| Binder.restoreCallingIdentity(callingIdentity); |
| } else { |
| Slog.e(TAG, "Unable to acquire UserManager"); |
| } |
| return userId; |
| } |
| |
| boolean isCurrentUserOrProfile(int userId) { |
| UserManager um = UserManager.get(mContext); |
| |
| // Allow current user or profiles of the current user... |
| for (int profileId : um.getEnabledProfileIds(userId)) { |
| if (profileId == userId) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean isForegroundActivity(int uid, int pid) { |
| try { |
| List<RunningAppProcessInfo> procs = |
| ActivityManagerNative.getDefault().getRunningAppProcesses(); |
| int N = procs.size(); |
| for (int i = 0; i < N; i++) { |
| RunningAppProcessInfo proc = procs.get(i); |
| if (proc.pid == pid && proc.uid == uid |
| && proc.importance == IMPORTANCE_FOREGROUND) { |
| return true; |
| } |
| } |
| } catch (RemoteException e) { |
| Slog.w(TAG, "am.getRunningAppProcesses() failed"); |
| } |
| return false; |
| } |
| |
| /** |
| * @param opPackageName name of package for caller |
| * @param foregroundOnly only allow this call while app is in the foreground |
| * @return true if caller can use fingerprint API |
| */ |
| private boolean canUseFingerprint(String opPackageName, boolean foregroundOnly, int uid, |
| int pid) { |
| checkPermission(USE_FINGERPRINT); |
| if (isKeyguard(opPackageName)) { |
| return true; // Keyguard is always allowed |
| } |
| if (!isCurrentUserOrProfile(UserHandle.getCallingUserId())) { |
| Slog.w(TAG,"Rejecting " + opPackageName + " ; not a current user or profile"); |
| return false; |
| } |
| if (mAppOps.noteOp(AppOpsManager.OP_USE_FINGERPRINT, uid, opPackageName) |
| != AppOpsManager.MODE_ALLOWED) { |
| Slog.w(TAG, "Rejecting " + opPackageName + " ; permission denied"); |
| return false; |
| } |
| if (foregroundOnly && !isForegroundActivity(uid, pid)) { |
| Slog.w(TAG, "Rejecting " + opPackageName + " ; not in foreground"); |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * @param clientPackage |
| * @return true if this is keyguard package |
| */ |
| private boolean isKeyguard(String clientPackage) { |
| return mKeyguardPackage.equals(clientPackage); |
| } |
| |
| private void addLockoutResetMonitor(FingerprintServiceLockoutResetMonitor monitor) { |
| if (!mLockoutMonitors.contains(monitor)) { |
| mLockoutMonitors.add(monitor); |
| } |
| } |
| |
| private void removeLockoutResetCallback( |
| FingerprintServiceLockoutResetMonitor monitor) { |
| mLockoutMonitors.remove(monitor); |
| } |
| |
| private void notifyLockoutResetMonitors() { |
| for (int i = 0; i < mLockoutMonitors.size(); i++) { |
| mLockoutMonitors.get(i).sendLockoutReset(); |
| } |
| } |
| |
| private void startAuthentication(IBinder token, long opId, int callingUserId, int groupId, |
| IFingerprintServiceReceiver receiver, int flags, boolean restricted, |
| String opPackageName) { |
| updateActiveGroup(groupId, opPackageName); |
| |
| if (DEBUG) Slog.v(TAG, "startAuthentication(" + opPackageName + ")"); |
| |
| AuthenticationClient client = new AuthenticationClient(getContext(), mHalDeviceId, token, |
| receiver, callingUserId, groupId, opId, restricted, opPackageName) { |
| @Override |
| public boolean handleFailedAttempt() { |
| mFailedAttempts++; |
| if (inLockoutMode()) { |
| // Failing multiple times will continue to push out the lockout time. |
| scheduleLockoutReset(); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void resetFailedAttempts() { |
| FingerprintService.this.resetFailedAttempts(); |
| } |
| |
| @Override |
| public void notifyUserActivity() { |
| FingerprintService.this.userActivity(); |
| } |
| |
| @Override |
| public IFingerprintDaemon getFingerprintDaemon() { |
| return FingerprintService.this.getFingerprintDaemon(); |
| } |
| }; |
| |
| if (inLockoutMode()) { |
| Slog.v(TAG, "In lockout mode; disallowing authentication"); |
| // Don't bother starting the client. Just send the error message. |
| if (!client.onError(FingerprintManager.FINGERPRINT_ERROR_LOCKOUT)) { |
| Slog.w(TAG, "Cannot send timeout message to client"); |
| } |
| return; |
| } |
| startClient(client, true /* initiatedByClient */); |
| } |
| |
| private void startEnrollment(IBinder token, byte [] cryptoToken, int userId, |
| IFingerprintServiceReceiver receiver, int flags, boolean restricted, |
| String opPackageName) { |
| updateActiveGroup(userId, opPackageName); |
| |
| final int groupId = userId; // default group for fingerprint enrollment |
| |
| EnrollClient client = new EnrollClient(getContext(), mHalDeviceId, token, receiver, |
| userId, groupId, cryptoToken, restricted, opPackageName) { |
| |
| @Override |
| public IFingerprintDaemon getFingerprintDaemon() { |
| return FingerprintService.this.getFingerprintDaemon(); |
| } |
| |
| @Override |
| public void notifyUserActivity() { |
| FingerprintService.this.userActivity(); |
| } |
| }; |
| startClient(client, true /* initiatedByClient */); |
| } |
| |
| protected void resetFailedAttempts() { |
| if (DEBUG && inLockoutMode()) { |
| Slog.v(TAG, "Reset fingerprint lockout"); |
| } |
| mFailedAttempts = 0; |
| // If we're asked to reset failed attempts externally (i.e. from Keyguard), |
| // the alarm might still be pending; remove it. |
| cancelLockoutReset(); |
| notifyLockoutResetMonitors(); |
| } |
| |
| private class FingerprintServiceLockoutResetMonitor { |
| |
| private final IFingerprintServiceLockoutResetCallback mCallback; |
| |
| public FingerprintServiceLockoutResetMonitor( |
| IFingerprintServiceLockoutResetCallback callback) { |
| mCallback = callback; |
| } |
| |
| public void sendLockoutReset() { |
| if (mCallback != null) { |
| try { |
| mCallback.onLockoutReset(mHalDeviceId); |
| } catch (DeadObjectException e) { |
| Slog.w(TAG, "Death object while invoking onLockoutReset: ", e); |
| mHandler.post(mRemoveCallbackRunnable); |
| } catch (RemoteException e) { |
| Slog.w(TAG, "Failed to invoke onLockoutReset: ", e); |
| } |
| } |
| } |
| |
| private final Runnable mRemoveCallbackRunnable = new Runnable() { |
| @Override |
| public void run() { |
| removeLockoutResetCallback(FingerprintServiceLockoutResetMonitor.this); |
| } |
| }; |
| } |
| |
| private IFingerprintDaemonCallback mDaemonCallback = new IFingerprintDaemonCallback.Stub() { |
| |
| @Override |
| public void onEnrollResult(final long deviceId, final int fingerId, final int groupId, |
| final int remaining) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleEnrollResult(deviceId, fingerId, groupId, remaining); |
| } |
| }); |
| } |
| |
| @Override |
| public void onAcquired(final long deviceId, final int acquiredInfo) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleAcquired(deviceId, acquiredInfo); |
| } |
| }); |
| } |
| |
| @Override |
| public void onAuthenticated(final long deviceId, final int fingerId, final int groupId) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleAuthenticated(deviceId, fingerId, groupId); |
| } |
| }); |
| } |
| |
| @Override |
| public void onError(final long deviceId, final int error) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleError(deviceId, error); |
| } |
| }); |
| } |
| |
| @Override |
| public void onRemoved(final long deviceId, final int fingerId, final int groupId) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleRemoved(deviceId, fingerId, groupId); |
| } |
| }); |
| } |
| |
| @Override |
| public void onEnumerate(final long deviceId, final int[] fingerIds, final int[] groupIds) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| handleEnumerate(deviceId, fingerIds, groupIds); |
| } |
| }); |
| } |
| }; |
| |
| private final class FingerprintServiceWrapper extends IFingerprintService.Stub { |
| @Override // Binder call |
| public long preEnroll(IBinder token) { |
| checkPermission(MANAGE_FINGERPRINT); |
| return startPreEnroll(token); |
| } |
| |
| @Override // Binder call |
| public int postEnroll(IBinder token) { |
| checkPermission(MANAGE_FINGERPRINT); |
| return startPostEnroll(token); |
| } |
| |
| @Override // Binder call |
| public void enroll(final IBinder token, final byte[] cryptoToken, final int userId, |
| final IFingerprintServiceReceiver receiver, final int flags, |
| final String opPackageName) { |
| checkPermission(MANAGE_FINGERPRINT); |
| final int limit = mContext.getResources().getInteger( |
| com.android.internal.R.integer.config_fingerprintMaxTemplatesPerUser); |
| |
| final int enrolled = FingerprintService.this.getEnrolledFingerprints(userId).size(); |
| if (enrolled >= limit) { |
| Slog.w(TAG, "Too many fingerprints registered"); |
| return; |
| } |
| |
| // Group ID is arbitrarily set to parent profile user ID. It just represents |
| // the default fingerprints for the user. |
| if (!isCurrentUserOrProfile(userId)) { |
| return; |
| } |
| |
| final boolean restricted = isRestricted(); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| startEnrollment(token, cryptoToken, userId, receiver, flags, |
| restricted, opPackageName); |
| } |
| }); |
| } |
| |
| private boolean isRestricted() { |
| // Only give privileged apps (like Settings) access to fingerprint info |
| final boolean restricted = !hasPermission(MANAGE_FINGERPRINT); |
| return restricted; |
| } |
| |
| @Override // Binder call |
| public void cancelEnrollment(final IBinder token) { |
| checkPermission(MANAGE_FINGERPRINT); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| ClientMonitor client = mCurrentClient; |
| if (client instanceof EnrollClient && client.getToken() == token) { |
| client.stop(client.getToken() == token); |
| } |
| } |
| }); |
| } |
| |
| @Override // Binder call |
| public void authenticate(final IBinder token, final long opId, final int groupId, |
| final IFingerprintServiceReceiver receiver, final int flags, |
| final String opPackageName) { |
| final int callingUid = Binder.getCallingUid(); |
| final int callingUserId = UserHandle.getCallingUserId(); |
| final int pid = Binder.getCallingPid(); |
| final boolean restricted = isRestricted(); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| MetricsLogger.histogram(mContext, "fingerprint_token", opId != 0L ? 1 : 0); |
| if (!canUseFingerprint(opPackageName, true /* foregroundOnly */, |
| callingUid, pid)) { |
| if (DEBUG) Slog.v(TAG, "authenticate(): reject " + opPackageName); |
| return; |
| } |
| startAuthentication(token, opId, callingUserId, groupId, receiver, |
| flags, restricted, opPackageName); |
| } |
| }); |
| } |
| |
| @Override // Binder call |
| public void cancelAuthentication(final IBinder token, final String opPackageName) { |
| final int uid = Binder.getCallingUid(); |
| final int pid = Binder.getCallingPid(); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| if (!canUseFingerprint(opPackageName, true /* foregroundOnly */, uid, pid)) { |
| if (DEBUG) Slog.v(TAG, "cancelAuthentication(): reject " + opPackageName); |
| } else { |
| ClientMonitor client = mCurrentClient; |
| if (client instanceof AuthenticationClient) { |
| if (client.getToken() == token) { |
| if (DEBUG) Slog.v(TAG, "stop client " + client.getOwnerString()); |
| client.stop(client.getToken() == token); |
| } else { |
| if (DEBUG) Slog.v(TAG, "can't stop client " |
| + client.getOwnerString() + " since tokens don't match"); |
| } |
| } else if (client != null) { |
| if (DEBUG) Slog.v(TAG, "can't cancel non-authenticating client " |
| + client.getOwnerString()); |
| } |
| } |
| } |
| }); |
| } |
| |
| @Override // Binder call |
| public void setActiveUser(final int userId) { |
| checkPermission(MANAGE_FINGERPRINT); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| updateActiveGroup(userId, null); |
| } |
| }); |
| } |
| |
| @Override // Binder call |
| public void remove(final IBinder token, final int fingerId, final int groupId, |
| final int userId, final IFingerprintServiceReceiver receiver) { |
| checkPermission(MANAGE_FINGERPRINT); // TODO: Maybe have another permission |
| final boolean restricted = isRestricted(); |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| startRemove(token, fingerId, groupId, userId, receiver, restricted); |
| } |
| }); |
| |
| } |
| |
| @Override // Binder call |
| public boolean isHardwareDetected(long deviceId, String opPackageName) { |
| if (!canUseFingerprint(opPackageName, false /* foregroundOnly */, |
| Binder.getCallingUid(), Binder.getCallingPid())) { |
| return false; |
| } |
| return mHalDeviceId != 0; |
| } |
| |
| @Override // Binder call |
| public void rename(final int fingerId, final int groupId, final String name) { |
| checkPermission(MANAGE_FINGERPRINT); |
| if (!isCurrentUserOrProfile(groupId)) { |
| return; |
| } |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| mFingerprintUtils.renameFingerprintForUser(mContext, fingerId, |
| groupId, name); |
| } |
| }); |
| } |
| |
| @Override // Binder call |
| public List<Fingerprint> getEnrolledFingerprints(int userId, String opPackageName) { |
| if (!canUseFingerprint(opPackageName, false /* foregroundOnly */, |
| Binder.getCallingUid(), Binder.getCallingPid())) { |
| return Collections.emptyList(); |
| } |
| if (!isCurrentUserOrProfile(userId)) { |
| return Collections.emptyList(); |
| } |
| |
| return FingerprintService.this.getEnrolledFingerprints(userId); |
| } |
| |
| @Override // Binder call |
| public boolean hasEnrolledFingerprints(int userId, String opPackageName) { |
| if (!canUseFingerprint(opPackageName, false /* foregroundOnly */, |
| Binder.getCallingUid(), Binder.getCallingPid())) { |
| return false; |
| } |
| |
| if (!isCurrentUserOrProfile(userId)) { |
| return false; |
| } |
| return FingerprintService.this.hasEnrolledFingerprints(userId); |
| } |
| |
| @Override // Binder call |
| public long getAuthenticatorId(String opPackageName) { |
| // In this method, we're not checking whether the caller is permitted to use fingerprint |
| // API because current authenticator ID is leaked (in a more contrived way) via Android |
| // Keystore (android.security.keystore package): the user of that API can create a key |
| // which requires fingerprint authentication for its use, and then query the key's |
| // characteristics (hidden API) which returns, among other things, fingerprint |
| // authenticator ID which was active at key creation time. |
| // |
| // Reason: The part of Android Keystore which runs inside an app's process invokes this |
| // method in certain cases. Those cases are not always where the developer demonstrates |
| // explicit intent to use fingerprint functionality. Thus, to avoiding throwing an |
| // unexpected SecurityException this method does not check whether its caller is |
| // permitted to use fingerprint API. |
| // |
| // The permission check should be restored once Android Keystore no longer invokes this |
| // method from inside app processes. |
| |
| return FingerprintService.this.getAuthenticatorId(opPackageName); |
| } |
| |
| @Override // Binder call |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mContext.checkCallingOrSelfPermission(Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump Fingerprint from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid()); |
| return; |
| } |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| dumpInternal(pw); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| @Override // Binder call |
| public void resetTimeout(byte [] token) { |
| checkPermission(RESET_FINGERPRINT_LOCKOUT); |
| // TODO: confirm security token when we move timeout management into the HAL layer. |
| mHandler.post(mResetFailedAttemptsRunnable); |
| } |
| |
| @Override |
| public void addLockoutResetCallback(final IFingerprintServiceLockoutResetCallback callback) |
| throws RemoteException { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| addLockoutResetMonitor( |
| new FingerprintServiceLockoutResetMonitor(callback)); |
| } |
| }); |
| } |
| } |
| |
| private void dumpInternal(PrintWriter pw) { |
| JSONObject dump = new JSONObject(); |
| try { |
| dump.put("service", "Fingerprint Manager"); |
| |
| JSONArray sets = new JSONArray(); |
| for (UserInfo user : UserManager.get(getContext()).getUsers()) { |
| final int userId = user.getUserHandle().getIdentifier(); |
| final int N = mFingerprintUtils.getFingerprintsForUser(mContext, userId).size(); |
| JSONObject set = new JSONObject(); |
| set.put("id", userId); |
| set.put("count", N); |
| sets.put(set); |
| } |
| |
| dump.put("prints", sets); |
| } catch (JSONException e) { |
| Slog.e(TAG, "dump formatting failure", e); |
| } |
| pw.println(dump); |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.FINGERPRINT_SERVICE, new FingerprintServiceWrapper()); |
| IFingerprintDaemon daemon = getFingerprintDaemon(); |
| if (DEBUG) Slog.v(TAG, "Fingerprint HAL id: " + mHalDeviceId); |
| listenForUserSwitches(); |
| } |
| |
| private void updateActiveGroup(int userId, String clientPackage) { |
| IFingerprintDaemon daemon = getFingerprintDaemon(); |
| if (daemon != null) { |
| try { |
| userId = getUserOrWorkProfileId(clientPackage, userId); |
| if (userId != mCurrentUserId) { |
| final File systemDir = Environment.getUserSystemDirectory(userId); |
| final File fpDir = new File(systemDir, FP_DATA_DIR); |
| if (!fpDir.exists()) { |
| if (!fpDir.mkdir()) { |
| Slog.v(TAG, "Cannot make directory: " + fpDir.getAbsolutePath()); |
| return; |
| } |
| // Calling mkdir() from this process will create a directory with our |
| // permissions (inherited from the containing dir). This command fixes |
| // the label. |
| if (!SELinux.restorecon(fpDir)) { |
| Slog.w(TAG, "Restorecons failed. Directory will have wrong label."); |
| return; |
| } |
| } |
| daemon.setActiveGroup(userId, fpDir.getAbsolutePath().getBytes()); |
| mCurrentUserId = userId; |
| } |
| mCurrentAuthenticatorId = daemon.getAuthenticatorId(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failed to setActiveGroup():", e); |
| } |
| } |
| } |
| |
| /** |
| * @param clientPackage the package of the caller |
| * @return the profile id |
| */ |
| private int getUserOrWorkProfileId(String clientPackage, int userId) { |
| if (!isKeyguard(clientPackage) && isWorkProfile(userId)) { |
| return userId; |
| } |
| return getEffectiveUserId(userId); |
| } |
| |
| /** |
| * @param userId |
| * @return true if this is a work profile |
| */ |
| private boolean isWorkProfile(int userId) { |
| UserInfo info = mUserManager.getUserInfo(userId); |
| return info != null && info.isManagedProfile(); |
| } |
| |
| private void listenForUserSwitches() { |
| try { |
| ActivityManagerNative.getDefault().registerUserSwitchObserver( |
| new SynchronousUserSwitchObserver() { |
| @Override |
| public void onUserSwitching(int newUserId) throws RemoteException { |
| mHandler.obtainMessage(MSG_USER_SWITCHING, newUserId, 0 /* unused */) |
| .sendToTarget(); |
| } |
| @Override |
| public void onUserSwitchComplete(int newUserId) throws RemoteException { |
| // Ignore. |
| } |
| @Override |
| public void onForegroundProfileSwitch(int newProfileId) { |
| // Ignore. |
| } |
| }); |
| } catch (RemoteException e) { |
| Slog.w(TAG, "Failed to listen for user switching event" ,e); |
| } |
| } |
| |
| /*** |
| * @param opPackageName the name of the calling package |
| * @return authenticator id for the current user |
| */ |
| public long getAuthenticatorId(String opPackageName) { |
| return mCurrentAuthenticatorId; |
| } |
| |
| } |
