| /* |
| * Copyright (C) 2012 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; |
| |
| import static android.Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE; |
| import static android.Manifest.permission.READ_CONTACTS; |
| import static android.content.Context.KEYGUARD_SERVICE; |
| import static com.android.internal.widget.LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_LOCKOUT; |
| import static com.android.internal.widget.LockPatternUtils.SYNTHETIC_PASSWORD_ENABLED_KEY; |
| import static com.android.internal.widget.LockPatternUtils.SYNTHETIC_PASSWORD_HANDLE_KEY; |
| |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManager; |
| import android.app.IActivityManager; |
| import android.app.KeyguardManager; |
| import android.app.Notification; |
| import android.app.NotificationManager; |
| import android.app.PendingIntent; |
| import android.app.admin.DevicePolicyManager; |
| import android.app.admin.PasswordMetrics; |
| import android.app.backup.BackupManager; |
| import android.app.trust.IStrongAuthTracker; |
| import android.app.trust.TrustManager; |
| import android.content.BroadcastReceiver; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| import android.content.pm.UserInfo; |
| import android.content.res.Resources; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.IProgressListener; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.ServiceManager; |
| import android.os.ShellCallback; |
| import android.os.StrictMode; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.os.storage.IStorageManager; |
| import android.os.storage.StorageManager; |
| import android.provider.Settings; |
| import android.provider.Settings.Secure; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.security.GateKeeper; |
| import android.security.KeyStore; |
| import android.security.keystore.AndroidKeyStoreProvider; |
| import android.security.keystore.KeyProperties; |
| import android.security.keystore.KeyProtection; |
| import android.service.gatekeeper.GateKeeperResponse; |
| import android.service.gatekeeper.IGateKeeperService; |
| import android.text.TextUtils; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.messages.nano.SystemMessageProto.SystemMessage; |
| import com.android.internal.notification.SystemNotificationChannels; |
| import com.android.internal.util.ArrayUtils; |
| import com.android.internal.util.DumpUtils; |
| import com.android.internal.widget.ICheckCredentialProgressCallback; |
| import com.android.internal.widget.ILockSettings; |
| import com.android.internal.widget.LockPatternUtils; |
| import com.android.internal.widget.VerifyCredentialResponse; |
| import com.android.server.LockSettingsStorage.CredentialHash; |
| import com.android.server.SyntheticPasswordManager.AuthenticationResult; |
| import com.android.server.SyntheticPasswordManager.AuthenticationToken; |
| |
| import libcore.util.HexEncoding; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.FileDescriptor; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.nio.charset.StandardCharsets; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.InvalidKeyException; |
| import java.security.KeyStoreException; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.SecureRandom; |
| import java.security.UnrecoverableKeyException; |
| import java.security.cert.CertificateException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.crypto.BadPaddingException; |
| import javax.crypto.Cipher; |
| import javax.crypto.IllegalBlockSizeException; |
| import javax.crypto.KeyGenerator; |
| import javax.crypto.NoSuchPaddingException; |
| import javax.crypto.SecretKey; |
| import javax.crypto.spec.GCMParameterSpec; |
| |
| /** |
| * Keeps the lock pattern/password data and related settings for each user. Used by |
| * LockPatternUtils. Needs to be a service because Settings app also needs to be able to save |
| * lockscreen information for secondary users. |
| * |
| * @hide |
| */ |
| public class LockSettingsService extends ILockSettings.Stub { |
| private static final String TAG = "LockSettingsService"; |
| private static final String PERMISSION = ACCESS_KEYGUARD_SECURE_STORAGE; |
| private static final boolean DEBUG = false; |
| |
| private static final int PROFILE_KEY_IV_SIZE = 12; |
| private static final String SEPARATE_PROFILE_CHALLENGE_KEY = "lockscreen.profilechallenge"; |
| |
| private final Object mSeparateChallengeLock = new Object(); |
| |
| private final Injector mInjector; |
| private final Context mContext; |
| private final Handler mHandler; |
| @VisibleForTesting |
| protected final LockSettingsStorage mStorage; |
| private final LockSettingsStrongAuth mStrongAuth; |
| private final SynchronizedStrongAuthTracker mStrongAuthTracker; |
| |
| private final LockPatternUtils mLockPatternUtils; |
| private final NotificationManager mNotificationManager; |
| private final UserManager mUserManager; |
| private final IActivityManager mActivityManager; |
| |
| private final KeyStore mKeyStore; |
| |
| private boolean mFirstCallToVold; |
| protected IGateKeeperService mGateKeeperService; |
| private SyntheticPasswordManager mSpManager; |
| |
| /** |
| * The UIDs that are used for system credential storage in keystore. |
| */ |
| private static final int[] SYSTEM_CREDENTIAL_UIDS = { |
| Process.WIFI_UID, Process.VPN_UID, |
| Process.ROOT_UID }; |
| |
| // This class manages life cycle events for encrypted users on File Based Encryption (FBE) |
| // devices. The most basic of these is to show/hide notifications about missing features until |
| // the user unlocks the account and credential-encrypted storage is available. |
| public static final class Lifecycle extends SystemService { |
| private LockSettingsService mLockSettingsService; |
| |
| public Lifecycle(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void onStart() { |
| AndroidKeyStoreProvider.install(); |
| mLockSettingsService = new LockSettingsService(getContext()); |
| publishBinderService("lock_settings", mLockSettingsService); |
| } |
| |
| @Override |
| public void onStartUser(int userHandle) { |
| mLockSettingsService.onStartUser(userHandle); |
| } |
| |
| @Override |
| public void onUnlockUser(int userHandle) { |
| mLockSettingsService.onUnlockUser(userHandle); |
| } |
| |
| @Override |
| public void onCleanupUser(int userHandle) { |
| mLockSettingsService.onCleanupUser(userHandle); |
| } |
| } |
| |
| @VisibleForTesting |
| protected static class SynchronizedStrongAuthTracker |
| extends LockPatternUtils.StrongAuthTracker { |
| public SynchronizedStrongAuthTracker(Context context) { |
| super(context); |
| } |
| |
| @Override |
| protected void handleStrongAuthRequiredChanged(int strongAuthFlags, int userId) { |
| synchronized (this) { |
| super.handleStrongAuthRequiredChanged(strongAuthFlags, userId); |
| } |
| } |
| |
| @Override |
| public int getStrongAuthForUser(int userId) { |
| synchronized (this) { |
| return super.getStrongAuthForUser(userId); |
| } |
| } |
| |
| void register(LockSettingsStrongAuth strongAuth) { |
| strongAuth.registerStrongAuthTracker(this.mStub); |
| } |
| } |
| |
| /** |
| * Tie managed profile to primary profile if it is in unified mode and not tied before. |
| * |
| * @param managedUserId Managed profile user Id |
| * @param managedUserPassword Managed profile original password (when it has separated lock). |
| * NULL when it does not have a separated lock before. |
| */ |
| public void tieManagedProfileLockIfNecessary(int managedUserId, String managedUserPassword) { |
| if (DEBUG) Slog.v(TAG, "Check child profile lock for user: " + managedUserId); |
| // Only for managed profile |
| if (!mUserManager.getUserInfo(managedUserId).isManagedProfile()) { |
| return; |
| } |
| // Do not tie managed profile when work challenge is enabled |
| if (mLockPatternUtils.isSeparateProfileChallengeEnabled(managedUserId)) { |
| return; |
| } |
| // Do not tie managed profile to parent when it's done already |
| if (mStorage.hasChildProfileLock(managedUserId)) { |
| return; |
| } |
| // Do not tie it to parent when parent does not have a screen lock |
| final int parentId = mUserManager.getProfileParent(managedUserId).id; |
| if (!isUserSecure(parentId)) { |
| if (DEBUG) Slog.v(TAG, "Parent does not have a screen lock"); |
| return; |
| } |
| // Do not tie when the parent has no SID (but does have a screen lock). |
| // This can only happen during an upgrade path where SID is yet to be |
| // generated when the user unlocks for the first time. |
| try { |
| if (getGateKeeperService().getSecureUserId(parentId) == 0) { |
| return; |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failed to talk to GateKeeper service", e); |
| return; |
| } |
| if (DEBUG) Slog.v(TAG, "Tie managed profile to parent now!"); |
| byte[] randomLockSeed = new byte[] {}; |
| try { |
| randomLockSeed = SecureRandom.getInstance("SHA1PRNG").generateSeed(40); |
| String newPassword = String.valueOf(HexEncoding.encode(randomLockSeed)); |
| setLockCredentialInternal(newPassword, LockPatternUtils.CREDENTIAL_TYPE_PASSWORD, |
| managedUserPassword, managedUserId); |
| // We store a private credential for the managed user that's unlocked by the primary |
| // account holder's credential. As such, the user will never be prompted to enter this |
| // password directly, so we always store a password. |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC, managedUserId); |
| tieProfileLockToParent(managedUserId, newPassword); |
| } catch (NoSuchAlgorithmException | RemoteException e) { |
| Slog.e(TAG, "Fail to tie managed profile", e); |
| // Nothing client can do to fix this issue, so we do not throw exception out |
| } |
| } |
| |
| static class Injector { |
| |
| protected Context mContext; |
| |
| public Injector(Context context) { |
| mContext = context; |
| } |
| |
| public Context getContext() { |
| return mContext; |
| } |
| |
| public Handler getHandler() { |
| return new Handler(); |
| } |
| |
| public LockSettingsStorage getStorage() { |
| final LockSettingsStorage storage = new LockSettingsStorage(mContext); |
| storage.setDatabaseOnCreateCallback(new LockSettingsStorage.Callback() { |
| @Override |
| public void initialize(SQLiteDatabase db) { |
| // Get the lockscreen default from a system property, if available |
| boolean lockScreenDisable = SystemProperties.getBoolean( |
| "ro.lockscreen.disable.default", false); |
| if (lockScreenDisable) { |
| storage.writeKeyValue(db, LockPatternUtils.DISABLE_LOCKSCREEN_KEY, "1", 0); |
| } |
| } |
| }); |
| return storage; |
| } |
| |
| public LockSettingsStrongAuth getStrongAuth() { |
| return new LockSettingsStrongAuth(mContext); |
| } |
| |
| public SynchronizedStrongAuthTracker getStrongAuthTracker() { |
| return new SynchronizedStrongAuthTracker(mContext); |
| } |
| |
| public IActivityManager getActivityManager() { |
| return ActivityManager.getService(); |
| } |
| |
| public LockPatternUtils getLockPatternUtils() { |
| return new LockPatternUtils(mContext); |
| } |
| |
| public NotificationManager getNotificationManager() { |
| return (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE); |
| } |
| |
| public UserManager getUserManager() { |
| return (UserManager) mContext.getSystemService(Context.USER_SERVICE); |
| } |
| |
| public DevicePolicyManager getDevicePolicyManager() { |
| return (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); |
| } |
| |
| public KeyStore getKeyStore() { |
| return KeyStore.getInstance(); |
| } |
| |
| public IStorageManager getStorageManager() { |
| final IBinder service = ServiceManager.getService("mount"); |
| if (service != null) { |
| return IStorageManager.Stub.asInterface(service); |
| } |
| return null; |
| } |
| |
| public SyntheticPasswordManager getSyntheticPasswordManager(LockSettingsStorage storage) { |
| return new SyntheticPasswordManager(storage); |
| } |
| |
| public int binderGetCallingUid() { |
| return Binder.getCallingUid(); |
| } |
| } |
| |
| public LockSettingsService(Context context) { |
| this(new Injector(context)); |
| } |
| |
| @VisibleForTesting |
| protected LockSettingsService(Injector injector) { |
| mInjector = injector; |
| mContext = injector.getContext(); |
| mKeyStore = injector.getKeyStore(); |
| mHandler = injector.getHandler(); |
| mStrongAuth = injector.getStrongAuth(); |
| mActivityManager = injector.getActivityManager(); |
| |
| mLockPatternUtils = injector.getLockPatternUtils(); |
| mFirstCallToVold = true; |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_USER_ADDED); |
| filter.addAction(Intent.ACTION_USER_STARTING); |
| filter.addAction(Intent.ACTION_USER_REMOVED); |
| injector.getContext().registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, |
| null, null); |
| |
| mStorage = injector.getStorage(); |
| mNotificationManager = injector.getNotificationManager(); |
| mUserManager = injector.getUserManager(); |
| mStrongAuthTracker = injector.getStrongAuthTracker(); |
| mStrongAuthTracker.register(mStrongAuth); |
| |
| mSpManager = injector.getSyntheticPasswordManager(mStorage); |
| } |
| |
| /** |
| * If the account is credential-encrypted, show notification requesting the user to unlock the |
| * device. |
| */ |
| private void maybeShowEncryptionNotificationForUser(@UserIdInt int userId) { |
| final UserInfo user = mUserManager.getUserInfo(userId); |
| if (!user.isManagedProfile()) { |
| // When the user is locked, we communicate it loud-and-clear |
| // on the lockscreen; we only show a notification below for |
| // locked managed profiles. |
| return; |
| } |
| |
| final UserHandle userHandle = user.getUserHandle(); |
| final boolean isSecure = isUserSecure(userId); |
| if (isSecure && !mUserManager.isUserUnlockingOrUnlocked(userHandle)) { |
| UserInfo parent = mUserManager.getProfileParent(userId); |
| if (parent != null && |
| mUserManager.isUserUnlockingOrUnlocked(parent.getUserHandle()) && |
| !mUserManager.isQuietModeEnabled(userHandle)) { |
| // Only show notifications for managed profiles once their parent |
| // user is unlocked. |
| showEncryptionNotificationForProfile(userHandle); |
| } |
| } |
| } |
| |
| private void showEncryptionNotificationForProfile(UserHandle user) { |
| Resources r = mContext.getResources(); |
| CharSequence title = r.getText( |
| com.android.internal.R.string.user_encrypted_title); |
| CharSequence message = r.getText( |
| com.android.internal.R.string.profile_encrypted_message); |
| CharSequence detail = r.getText( |
| com.android.internal.R.string.profile_encrypted_detail); |
| |
| final KeyguardManager km = (KeyguardManager) mContext.getSystemService(KEYGUARD_SERVICE); |
| final Intent unlockIntent = km.createConfirmDeviceCredentialIntent(null, null, |
| user.getIdentifier()); |
| if (unlockIntent == null) { |
| return; |
| } |
| unlockIntent.setFlags( |
| Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); |
| PendingIntent intent = PendingIntent.getActivity(mContext, 0, unlockIntent, |
| PendingIntent.FLAG_UPDATE_CURRENT); |
| |
| showEncryptionNotification(user, title, message, detail, intent); |
| } |
| |
| private void showEncryptionNotification(UserHandle user, CharSequence title, |
| CharSequence message, CharSequence detail, PendingIntent intent) { |
| if (DEBUG) Slog.v(TAG, "showing encryption notification, user: " + user.getIdentifier()); |
| |
| // Suppress all notifications on non-FBE devices for now |
| if (!StorageManager.isFileEncryptedNativeOrEmulated()) return; |
| |
| Notification notification = |
| new Notification.Builder(mContext, SystemNotificationChannels.SECURITY) |
| .setSmallIcon(com.android.internal.R.drawable.ic_user_secure) |
| .setWhen(0) |
| .setOngoing(true) |
| .setTicker(title) |
| .setColor(mContext.getColor( |
| com.android.internal.R.color.system_notification_accent_color)) |
| .setContentTitle(title) |
| .setContentText(message) |
| .setSubText(detail) |
| .setVisibility(Notification.VISIBILITY_PUBLIC) |
| .setContentIntent(intent) |
| .build(); |
| mNotificationManager.notifyAsUser(null, SystemMessage.NOTE_FBE_ENCRYPTED_NOTIFICATION, |
| notification, user); |
| } |
| |
| private void hideEncryptionNotification(UserHandle userHandle) { |
| if (DEBUG) Slog.v(TAG, "hide encryption notification, user: " + userHandle.getIdentifier()); |
| mNotificationManager.cancelAsUser(null, SystemMessage.NOTE_FBE_ENCRYPTED_NOTIFICATION, |
| userHandle); |
| } |
| |
| public void onCleanupUser(int userId) { |
| hideEncryptionNotification(new UserHandle(userId)); |
| } |
| |
| public void onStartUser(final int userId) { |
| maybeShowEncryptionNotificationForUser(userId); |
| } |
| |
| public void onUnlockUser(final int userId) { |
| // Perform tasks which require locks in LSS on a handler, as we are callbacks from |
| // ActivityManager.unlockUser() |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| // Hide notification first, as tie managed profile lock takes time |
| hideEncryptionNotification(new UserHandle(userId)); |
| |
| // Now we have unlocked the parent user we should show notifications |
| // about any profiles that exist. |
| List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (int i = 0; i < profiles.size(); i++) { |
| UserInfo profile = profiles.get(i); |
| final boolean isSecure = isUserSecure(profile.id); |
| if (isSecure && profile.isManagedProfile()) { |
| UserHandle userHandle = profile.getUserHandle(); |
| if (!mUserManager.isUserUnlockingOrUnlocked(userHandle) && |
| !mUserManager.isQuietModeEnabled(userHandle)) { |
| showEncryptionNotificationForProfile(userHandle); |
| } |
| } |
| } |
| |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| tieManagedProfileLockIfNecessary(userId, null); |
| } |
| } |
| }); |
| } |
| |
| private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (Intent.ACTION_USER_ADDED.equals(intent.getAction())) { |
| // Notify keystore that a new user was added. |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (userHandle > UserHandle.USER_SYSTEM) { |
| removeUser(userHandle, /* unknownUser= */ true); |
| } |
| final KeyStore ks = KeyStore.getInstance(); |
| final UserInfo parentInfo = mUserManager.getProfileParent(userHandle); |
| final int parentHandle = parentInfo != null ? parentInfo.id : -1; |
| ks.onUserAdded(userHandle, parentHandle); |
| } else if (Intent.ACTION_USER_STARTING.equals(intent.getAction())) { |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| mStorage.prefetchUser(userHandle); |
| } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (userHandle > 0) { |
| removeUser(userHandle, /* unknownUser= */ false); |
| } |
| } |
| } |
| }; |
| |
| @Override // binder interface |
| public void systemReady() { |
| migrateOldData(); |
| try { |
| getGateKeeperService(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failure retrieving IGateKeeperService", e); |
| } |
| // TODO: maybe skip this for split system user mode. |
| mStorage.prefetchUser(UserHandle.USER_SYSTEM); |
| } |
| |
| private void migrateOldData() { |
| try { |
| // These Settings moved before multi-user was enabled, so we only have to do it for the |
| // root user. |
| if (getString("migrated", null, 0) == null) { |
| final ContentResolver cr = mContext.getContentResolver(); |
| for (String validSetting : VALID_SETTINGS) { |
| String value = Settings.Secure.getString(cr, validSetting); |
| if (value != null) { |
| setString(validSetting, value, 0); |
| } |
| } |
| // No need to move the password / pattern files. They're already in the right place. |
| setString("migrated", "true", 0); |
| Slog.i(TAG, "Migrated lock settings to new location"); |
| } |
| |
| // These Settings changed after multi-user was enabled, hence need to be moved per user. |
| if (getString("migrated_user_specific", null, 0) == null) { |
| final ContentResolver cr = mContext.getContentResolver(); |
| List<UserInfo> users = mUserManager.getUsers(); |
| for (int user = 0; user < users.size(); user++) { |
| // Migrate owner info |
| final int userId = users.get(user).id; |
| final String OWNER_INFO = Secure.LOCK_SCREEN_OWNER_INFO; |
| String ownerInfo = Settings.Secure.getStringForUser(cr, OWNER_INFO, userId); |
| if (!TextUtils.isEmpty(ownerInfo)) { |
| setString(OWNER_INFO, ownerInfo, userId); |
| Settings.Secure.putStringForUser(cr, OWNER_INFO, "", userId); |
| } |
| |
| // Migrate owner info enabled. Note there was a bug where older platforms only |
| // stored this value if the checkbox was toggled at least once. The code detects |
| // this case by handling the exception. |
| final String OWNER_INFO_ENABLED = Secure.LOCK_SCREEN_OWNER_INFO_ENABLED; |
| boolean enabled; |
| try { |
| int ivalue = Settings.Secure.getIntForUser(cr, OWNER_INFO_ENABLED, userId); |
| enabled = ivalue != 0; |
| setLong(OWNER_INFO_ENABLED, enabled ? 1 : 0, userId); |
| } catch (SettingNotFoundException e) { |
| // Setting was never stored. Store it if the string is not empty. |
| if (!TextUtils.isEmpty(ownerInfo)) { |
| setLong(OWNER_INFO_ENABLED, 1, userId); |
| } |
| } |
| Settings.Secure.putIntForUser(cr, OWNER_INFO_ENABLED, 0, userId); |
| } |
| // No need to move the password / pattern files. They're already in the right place. |
| setString("migrated_user_specific", "true", 0); |
| Slog.i(TAG, "Migrated per-user lock settings to new location"); |
| } |
| |
| // Migrates biometric weak such that the fallback mechanism becomes the primary. |
| if (getString("migrated_biometric_weak", null, 0) == null) { |
| List<UserInfo> users = mUserManager.getUsers(); |
| for (int i = 0; i < users.size(); i++) { |
| int userId = users.get(i).id; |
| long type = getLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| long alternateType = getLong(LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| if (type == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) { |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| alternateType, |
| userId); |
| } |
| setLong(LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, |
| userId); |
| } |
| setString("migrated_biometric_weak", "true", 0); |
| Slog.i(TAG, "Migrated biometric weak to use the fallback instead"); |
| } |
| |
| // Migrates lockscreen.disabled. Prior to M, the flag was ignored when more than one |
| // user was present on the system, so if we're upgrading to M and there is more than one |
| // user we disable the flag to remain consistent. |
| if (getString("migrated_lockscreen_disabled", null, 0) == null) { |
| final List<UserInfo> users = mUserManager.getUsers(); |
| final int userCount = users.size(); |
| int switchableUsers = 0; |
| for (int i = 0; i < userCount; i++) { |
| if (users.get(i).supportsSwitchTo()) { |
| switchableUsers++; |
| } |
| } |
| |
| if (switchableUsers > 1) { |
| for (int i = 0; i < userCount; i++) { |
| int id = users.get(i).id; |
| |
| if (getBoolean(LockPatternUtils.DISABLE_LOCKSCREEN_KEY, false, id)) { |
| setBoolean(LockPatternUtils.DISABLE_LOCKSCREEN_KEY, false, id); |
| } |
| } |
| } |
| |
| setString("migrated_lockscreen_disabled", "true", 0); |
| Slog.i(TAG, "Migrated lockscreen disabled flag"); |
| } |
| |
| final List<UserInfo> users = mUserManager.getUsers(); |
| for (int i = 0; i < users.size(); i++) { |
| final UserInfo userInfo = users.get(i); |
| if (userInfo.isManagedProfile() && mStorage.hasChildProfileLock(userInfo.id)) { |
| // When managed profile has a unified lock, the password quality stored has 2 |
| // possibilities only. |
| // 1). PASSWORD_QUALITY_UNSPECIFIED, which is upgraded from dp2, and we are |
| // going to set it back to PASSWORD_QUALITY_ALPHANUMERIC. |
| // 2). PASSWORD_QUALITY_ALPHANUMERIC, which is the actual password quality for |
| // unified lock. |
| final long quality = getLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userInfo.id); |
| if (quality == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) { |
| // Only possible when it's upgraded from nyc dp3 |
| Slog.i(TAG, "Migrated tied profile lock type"); |
| setLong(LockPatternUtils.PASSWORD_TYPE_KEY, |
| DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC, userInfo.id); |
| } else if (quality != DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC) { |
| // It should not happen |
| Slog.e(TAG, "Invalid tied profile lock type: " + quality); |
| } |
| } |
| try { |
| final String alias = LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userInfo.id; |
| java.security.KeyStore keyStore = |
| java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| if (keyStore.containsAlias(alias)) { |
| keyStore.deleteEntry(alias); |
| } |
| } catch (KeyStoreException | NoSuchAlgorithmException | |
| CertificateException | IOException e) { |
| Slog.e(TAG, "Unable to remove tied profile key", e); |
| } |
| } |
| |
| boolean isWatch = mContext.getPackageManager().hasSystemFeature( |
| PackageManager.FEATURE_WATCH); |
| // Wear used to set DISABLE_LOCKSCREEN to 'true', but because Wear now allows accounts |
| // and device management the lockscreen must be re-enabled now for users that upgrade. |
| if (isWatch && getString("migrated_wear_lockscreen_disabled", null, 0) == null) { |
| final int userCount = users.size(); |
| for (int i = 0; i < userCount; i++) { |
| int id = users.get(i).id; |
| setBoolean(LockPatternUtils.DISABLE_LOCKSCREEN_KEY, false, id); |
| } |
| setString("migrated_wear_lockscreen_disabled", "true", 0); |
| Slog.i(TAG, "Migrated lockscreen_disabled for Wear devices"); |
| } |
| } catch (RemoteException re) { |
| Slog.e(TAG, "Unable to migrate old data", re); |
| } |
| } |
| |
| private final void checkWritePermission(int userId) { |
| mContext.enforceCallingOrSelfPermission(PERMISSION, "LockSettingsWrite"); |
| } |
| |
| private final void checkPasswordReadPermission(int userId) { |
| mContext.enforceCallingOrSelfPermission(PERMISSION, "LockSettingsRead"); |
| } |
| |
| private final void checkReadPermission(String requestedKey, int userId) { |
| final int callingUid = Binder.getCallingUid(); |
| |
| for (int i = 0; i < READ_CONTACTS_PROTECTED_SETTINGS.length; i++) { |
| String key = READ_CONTACTS_PROTECTED_SETTINGS[i]; |
| if (key.equals(requestedKey) && mContext.checkCallingOrSelfPermission(READ_CONTACTS) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("uid=" + callingUid |
| + " needs permission " + READ_CONTACTS + " to read " |
| + requestedKey + " for user " + userId); |
| } |
| } |
| |
| for (int i = 0; i < READ_PASSWORD_PROTECTED_SETTINGS.length; i++) { |
| String key = READ_PASSWORD_PROTECTED_SETTINGS[i]; |
| if (key.equals(requestedKey) && mContext.checkCallingOrSelfPermission(PERMISSION) |
| != PackageManager.PERMISSION_GRANTED) { |
| throw new SecurityException("uid=" + callingUid |
| + " needs permission " + PERMISSION + " to read " |
| + requestedKey + " for user " + userId); |
| } |
| } |
| } |
| |
| @Override |
| public boolean getSeparateProfileChallengeEnabled(int userId) throws RemoteException { |
| checkReadPermission(SEPARATE_PROFILE_CHALLENGE_KEY, userId); |
| synchronized (mSeparateChallengeLock) { |
| return getBoolean(SEPARATE_PROFILE_CHALLENGE_KEY, false, userId); |
| } |
| } |
| |
| @Override |
| public void setSeparateProfileChallengeEnabled(int userId, boolean enabled, |
| String managedUserPassword) throws RemoteException { |
| checkWritePermission(userId); |
| synchronized (mSeparateChallengeLock) { |
| setBoolean(SEPARATE_PROFILE_CHALLENGE_KEY, enabled, userId); |
| if (enabled) { |
| mStorage.removeChildProfileLock(userId); |
| removeKeystoreProfileKey(userId); |
| } else { |
| tieManagedProfileLockIfNecessary(userId, managedUserPassword); |
| } |
| } |
| } |
| |
| @Override |
| public void setBoolean(String key, boolean value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, value ? "1" : "0"); |
| } |
| |
| @Override |
| public void setLong(String key, long value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, Long.toString(value)); |
| } |
| |
| @Override |
| public void setString(String key, String value, int userId) throws RemoteException { |
| checkWritePermission(userId); |
| setStringUnchecked(key, userId, value); |
| } |
| |
| private void setStringUnchecked(String key, int userId, String value) { |
| mStorage.writeKeyValue(key, value, userId); |
| if (ArrayUtils.contains(SETTINGS_TO_BACKUP, key)) { |
| BackupManager.dataChanged("com.android.providers.settings"); |
| } |
| } |
| |
| @Override |
| public boolean getBoolean(String key, boolean defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| String value = getStringUnchecked(key, null, userId); |
| return TextUtils.isEmpty(value) ? |
| defaultValue : (value.equals("1") || value.equals("true")); |
| } |
| |
| @Override |
| public long getLong(String key, long defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| String value = getStringUnchecked(key, null, userId); |
| return TextUtils.isEmpty(value) ? defaultValue : Long.parseLong(value); |
| } |
| |
| @Override |
| public String getString(String key, String defaultValue, int userId) throws RemoteException { |
| checkReadPermission(key, userId); |
| return getStringUnchecked(key, defaultValue, userId); |
| } |
| |
| public String getStringUnchecked(String key, String defaultValue, int userId) { |
| if (Settings.Secure.LOCK_PATTERN_ENABLED.equals(key)) { |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| return mLockPatternUtils.isLockPatternEnabled(userId) ? "1" : "0"; |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| if (LockPatternUtils.LEGACY_LOCK_PATTERN_ENABLED.equals(key)) { |
| key = Settings.Secure.LOCK_PATTERN_ENABLED; |
| } |
| |
| return mStorage.readKeyValue(key, defaultValue, userId); |
| } |
| |
| @Override |
| public boolean havePassword(int userId) throws RemoteException { |
| synchronized (mSpManager) { |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| return mSpManager.getCredentialType(handle, userId) == |
| LockPatternUtils.CREDENTIAL_TYPE_PASSWORD; |
| } |
| } |
| // Do we need a permissions check here? |
| return mStorage.hasPassword(userId); |
| } |
| |
| @Override |
| public boolean havePattern(int userId) throws RemoteException { |
| synchronized (mSpManager) { |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| return mSpManager.getCredentialType(handle, userId) == |
| LockPatternUtils.CREDENTIAL_TYPE_PATTERN; |
| } |
| } |
| // Do we need a permissions check here? |
| return mStorage.hasPattern(userId); |
| } |
| |
| private boolean isUserSecure(int userId) { |
| synchronized (mSpManager) { |
| try { |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| return mSpManager.getCredentialType(handle, userId) != |
| LockPatternUtils.CREDENTIAL_TYPE_NONE; |
| } |
| } catch (RemoteException e) { |
| // fall through |
| } |
| } |
| return mStorage.hasCredential(userId); |
| } |
| |
| private void setKeystorePassword(String password, int userHandle) { |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.onUserPasswordChanged(userHandle, password); |
| } |
| |
| private void unlockKeystore(String password, int userHandle) { |
| if (DEBUG) Slog.v(TAG, "Unlock keystore for user: " + userHandle); |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.unlock(userHandle, password); |
| } |
| |
| @VisibleForTesting |
| protected String getDecryptedPasswordForTiedProfile(int userId) |
| throws KeyStoreException, UnrecoverableKeyException, |
| NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, |
| InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, |
| CertificateException, IOException { |
| if (DEBUG) Slog.v(TAG, "Get child profile decrytped key"); |
| byte[] storedData = mStorage.readChildProfileLock(userId); |
| if (storedData == null) { |
| throw new FileNotFoundException("Child profile lock file not found"); |
| } |
| byte[] iv = Arrays.copyOfRange(storedData, 0, PROFILE_KEY_IV_SIZE); |
| byte[] encryptedPassword = Arrays.copyOfRange(storedData, PROFILE_KEY_IV_SIZE, |
| storedData.length); |
| byte[] decryptionResult; |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| SecretKey decryptionKey = (SecretKey) keyStore.getKey( |
| LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + userId, null); |
| |
| Cipher cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" |
| + KeyProperties.BLOCK_MODE_GCM + "/" + KeyProperties.ENCRYPTION_PADDING_NONE); |
| |
| cipher.init(Cipher.DECRYPT_MODE, decryptionKey, new GCMParameterSpec(128, iv)); |
| decryptionResult = cipher.doFinal(encryptedPassword); |
| return new String(decryptionResult, StandardCharsets.UTF_8); |
| } |
| |
| private void unlockChildProfile(int profileHandle) throws RemoteException { |
| try { |
| doVerifyCredential(getDecryptedPasswordForTiedProfile(profileHandle), |
| LockPatternUtils.CREDENTIAL_TYPE_PASSWORD, |
| false, 0 /* no challenge */, profileHandle, null /* progressCallback */); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| if (e instanceof FileNotFoundException) { |
| Slog.i(TAG, "Child profile key not found"); |
| } else { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } |
| |
| private void unlockUser(int userId, byte[] token, byte[] secret) { |
| // TODO: make this method fully async so we can update UI with progress strings |
| final CountDownLatch latch = new CountDownLatch(1); |
| final IProgressListener listener = new IProgressListener.Stub() { |
| @Override |
| public void onStarted(int id, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser started"); |
| } |
| |
| @Override |
| public void onProgress(int id, int progress, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser progress " + progress); |
| } |
| |
| @Override |
| public void onFinished(int id, Bundle extras) throws RemoteException { |
| Log.d(TAG, "unlockUser finished"); |
| latch.countDown(); |
| } |
| }; |
| |
| try { |
| mActivityManager.unlockUser(userId, token, secret, listener); |
| } catch (RemoteException e) { |
| throw e.rethrowAsRuntimeException(); |
| } |
| |
| try { |
| latch.await(15, TimeUnit.SECONDS); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| try { |
| if (!mUserManager.getUserInfo(userId).isManagedProfile()) { |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (UserInfo pi : profiles) { |
| // Unlock managed profile with unified lock |
| if (pi.isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(pi.id) |
| && mStorage.hasChildProfileLock(pi.id) |
| && mUserManager.isUserRunning(pi.id)) { |
| unlockChildProfile(pi.id); |
| } |
| } |
| } |
| } catch (RemoteException e) { |
| Log.d(TAG, "Failed to unlock child profile", e); |
| } |
| } |
| |
| private Map<Integer, String> getDecryptedPasswordsForAllTiedProfiles(int userId) { |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| return null; |
| } |
| Map<Integer, String> result = new ArrayMap<Integer, String>(); |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| final int size = profiles.size(); |
| for (int i = 0; i < size; i++) { |
| final UserInfo profile = profiles.get(i); |
| if (!profile.isManagedProfile()) { |
| continue; |
| } |
| final int managedUserId = profile.id; |
| if (mLockPatternUtils.isSeparateProfileChallengeEnabled(managedUserId)) { |
| continue; |
| } |
| try { |
| result.put(userId, getDecryptedPasswordForTiedProfile(userId)); |
| } catch (KeyStoreException | UnrecoverableKeyException | NoSuchAlgorithmException |
| | NoSuchPaddingException | InvalidKeyException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| // ignore |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Synchronize all profile's work challenge of the given user if it's unified: tie or clear them |
| * depending on the parent user's secure state. |
| * |
| * When clearing tied work challenges, a pre-computed password table for profiles are required, |
| * since changing password for profiles requires existing password, and existing passwords can |
| * only be computed before the parent user's password is cleared. |
| * |
| * Strictly this is a recursive function, since setLockCredentialInternal ends up calling this |
| * method again on profiles. However the recursion is guaranteed to terminate as this method |
| * terminates when the user is a managed profile. |
| */ |
| private void synchronizeUnifiedWorkChallengeForProfiles(int userId, |
| Map<Integer, String> profilePasswordMap) throws RemoteException { |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| return; |
| } |
| final boolean isSecure = isUserSecure(userId); |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| final int size = profiles.size(); |
| for (int i = 0; i < size; i++) { |
| final UserInfo profile = profiles.get(i); |
| if (profile.isManagedProfile()) { |
| final int managedUserId = profile.id; |
| if (mLockPatternUtils.isSeparateProfileChallengeEnabled(managedUserId)) { |
| continue; |
| } |
| if (isSecure) { |
| tieManagedProfileLockIfNecessary(managedUserId, null); |
| } else { |
| // We use cached work profile password computed before clearing the parent's |
| // credential, otherwise they get lost |
| if (profilePasswordMap != null && profilePasswordMap.containsKey(managedUserId)) { |
| setLockCredentialInternal(null, LockPatternUtils.CREDENTIAL_TYPE_NONE, |
| profilePasswordMap.get(managedUserId), managedUserId); |
| } else { |
| Slog.wtf(TAG, "clear tied profile challenges, but no password supplied."); |
| // Supplying null here would lead to untrusted credential change |
| setLockCredentialInternal(null, LockPatternUtils.CREDENTIAL_TYPE_NONE, null, |
| managedUserId); |
| } |
| mStorage.removeChildProfileLock(managedUserId); |
| removeKeystoreProfileKey(managedUserId); |
| } |
| } |
| } |
| } |
| |
| private boolean isManagedProfileWithUnifiedLock(int userId) { |
| return mUserManager.getUserInfo(userId).isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(userId); |
| } |
| |
| private boolean isManagedProfileWithSeparatedLock(int userId) { |
| return mUserManager.getUserInfo(userId).isManagedProfile() |
| && mLockPatternUtils.isSeparateProfileChallengeEnabled(userId); |
| } |
| |
| // This method should be called by LockPatternUtil only, all internal methods in this class |
| // should call setLockCredentialInternal. |
| @Override |
| public void setLockCredential(String credential, int type, String savedCredential, int userId) |
| throws RemoteException { |
| checkWritePermission(userId); |
| synchronized (mSeparateChallengeLock) { |
| setLockCredentialInternal(credential, type, savedCredential, userId); |
| setSeparateProfileChallengeEnabled(userId, true, null); |
| notifyPasswordChanged(userId); |
| } |
| } |
| |
| private void setLockCredentialInternal(String credential, int credentialType, |
| String savedCredential, int userId) throws RemoteException { |
| // Normalize savedCredential and credential such that empty string is always represented |
| // as null. |
| if (TextUtils.isEmpty(savedCredential)) { |
| savedCredential = null; |
| } |
| if (TextUtils.isEmpty(credential)) { |
| credential = null; |
| } |
| synchronized (mSpManager) { |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| spBasedSetLockCredentialInternalLocked(credential, credentialType, savedCredential, |
| userId); |
| return; |
| } |
| } |
| if (credentialType == LockPatternUtils.CREDENTIAL_TYPE_NONE) { |
| if (credential != null) { |
| Slog.wtf(TAG, "CredentialType is none, but credential is non-null."); |
| } |
| clearUserKeyProtection(userId); |
| getGateKeeperService().clearSecureUserId(userId); |
| mStorage.writeCredentialHash(CredentialHash.createEmptyHash(), userId); |
| setKeystorePassword(null, userId); |
| fixateNewestUserKeyAuth(userId); |
| synchronizeUnifiedWorkChallengeForProfiles(userId, null); |
| notifyActivePasswordMetricsAvailable(null, userId); |
| return; |
| } |
| if (credential == null) { |
| throw new RemoteException("Null credential with mismatched credential type"); |
| } |
| |
| CredentialHash currentHandle = mStorage.readCredentialHash(userId); |
| if (isManagedProfileWithUnifiedLock(userId)) { |
| // get credential from keystore when managed profile has unified lock |
| if (savedCredential == null) { |
| try { |
| savedCredential = getDecryptedPasswordForTiedProfile(userId); |
| } catch (FileNotFoundException e) { |
| Slog.i(TAG, "Child profile key not found"); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } else { |
| if (currentHandle.hash == null) { |
| if (savedCredential != null) { |
| Slog.w(TAG, "Saved credential provided, but none stored"); |
| } |
| savedCredential = null; |
| } |
| } |
| synchronized (mSpManager) { |
| if (shouldMigrateToSyntheticPasswordLocked(userId)) { |
| initializeSyntheticPasswordLocked(currentHandle.hash, savedCredential, |
| currentHandle.type, userId); |
| spBasedSetLockCredentialInternalLocked(credential, credentialType, savedCredential, |
| userId); |
| return; |
| } |
| } |
| if (DEBUG) Slog.d(TAG, "setLockCredentialInternal: user=" + userId); |
| byte[] enrolledHandle = enrollCredential(currentHandle.hash, savedCredential, credential, |
| userId); |
| if (enrolledHandle != null) { |
| CredentialHash willStore = CredentialHash.create(enrolledHandle, credentialType); |
| mStorage.writeCredentialHash(willStore, userId); |
| // push new secret and auth token to vold |
| GateKeeperResponse gkResponse = getGateKeeperService() |
| .verifyChallenge(userId, 0, willStore.hash, credential.getBytes()); |
| setUserKeyProtection(userId, credential, convertResponse(gkResponse)); |
| fixateNewestUserKeyAuth(userId); |
| // Refresh the auth token |
| doVerifyCredential(credential, credentialType, true, 0, userId, null /* progressCallback */); |
| synchronizeUnifiedWorkChallengeForProfiles(userId, null); |
| } else { |
| throw new RemoteException("Failed to enroll " + |
| (credentialType == LockPatternUtils.CREDENTIAL_TYPE_PASSWORD ? "password" |
| : "pattern")); |
| } |
| } |
| |
| private VerifyCredentialResponse convertResponse(GateKeeperResponse gateKeeperResponse) { |
| VerifyCredentialResponse response; |
| int responseCode = gateKeeperResponse.getResponseCode(); |
| if (responseCode == GateKeeperResponse.RESPONSE_RETRY) { |
| response = new VerifyCredentialResponse(gateKeeperResponse.getTimeout()); |
| } else if (responseCode == GateKeeperResponse.RESPONSE_OK) { |
| byte[] token = gateKeeperResponse.getPayload(); |
| if (token == null) { |
| // something's wrong if there's no payload with a challenge |
| Slog.e(TAG, "verifyChallenge response had no associated payload"); |
| response = VerifyCredentialResponse.ERROR; |
| } else { |
| response = new VerifyCredentialResponse(token); |
| } |
| } else { |
| response = VerifyCredentialResponse.ERROR; |
| } |
| return response; |
| } |
| |
| @VisibleForTesting |
| protected void tieProfileLockToParent(int userId, String password) { |
| if (DEBUG) Slog.v(TAG, "tieProfileLockToParent for user: " + userId); |
| byte[] randomLockSeed = password.getBytes(StandardCharsets.UTF_8); |
| byte[] encryptionResult; |
| byte[] iv; |
| try { |
| KeyGenerator keyGenerator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES); |
| keyGenerator.init(new SecureRandom()); |
| SecretKey secretKey = keyGenerator.generateKey(); |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| try { |
| keyStore.setEntry( |
| LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId, |
| new java.security.KeyStore.SecretKeyEntry(secretKey), |
| new KeyProtection.Builder(KeyProperties.PURPOSE_ENCRYPT) |
| .setBlockModes(KeyProperties.BLOCK_MODE_GCM) |
| .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE) |
| .build()); |
| keyStore.setEntry( |
| LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + userId, |
| new java.security.KeyStore.SecretKeyEntry(secretKey), |
| new KeyProtection.Builder(KeyProperties.PURPOSE_DECRYPT) |
| .setBlockModes(KeyProperties.BLOCK_MODE_GCM) |
| .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE) |
| .setUserAuthenticationRequired(true) |
| .setUserAuthenticationValidityDurationSeconds(30) |
| .build()); |
| // Key imported, obtain a reference to it. |
| SecretKey keyStoreEncryptionKey = (SecretKey) keyStore.getKey( |
| LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId, null); |
| Cipher cipher = Cipher.getInstance( |
| KeyProperties.KEY_ALGORITHM_AES + "/" + KeyProperties.BLOCK_MODE_GCM + "/" |
| + KeyProperties.ENCRYPTION_PADDING_NONE); |
| cipher.init(Cipher.ENCRYPT_MODE, keyStoreEncryptionKey); |
| encryptionResult = cipher.doFinal(randomLockSeed); |
| iv = cipher.getIV(); |
| } finally { |
| // The original key can now be discarded. |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + userId); |
| } |
| } catch (CertificateException | UnrecoverableKeyException |
| | IOException | BadPaddingException | IllegalBlockSizeException | KeyStoreException |
| | NoSuchPaddingException | NoSuchAlgorithmException | InvalidKeyException e) { |
| throw new RuntimeException("Failed to encrypt key", e); |
| } |
| ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); |
| try { |
| if (iv.length != PROFILE_KEY_IV_SIZE) { |
| throw new RuntimeException("Invalid iv length: " + iv.length); |
| } |
| outputStream.write(iv); |
| outputStream.write(encryptionResult); |
| } catch (IOException e) { |
| throw new RuntimeException("Failed to concatenate byte arrays", e); |
| } |
| mStorage.writeChildProfileLock(userId, outputStream.toByteArray()); |
| } |
| |
| private byte[] enrollCredential(byte[] enrolledHandle, |
| String enrolledCredential, String toEnroll, int userId) |
| throws RemoteException { |
| checkWritePermission(userId); |
| byte[] enrolledCredentialBytes = enrolledCredential == null |
| ? null |
| : enrolledCredential.getBytes(); |
| byte[] toEnrollBytes = toEnroll == null |
| ? null |
| : toEnroll.getBytes(); |
| GateKeeperResponse response = getGateKeeperService().enroll(userId, enrolledHandle, |
| enrolledCredentialBytes, toEnrollBytes); |
| |
| if (response == null) { |
| return null; |
| } |
| |
| byte[] hash = response.getPayload(); |
| if (hash != null) { |
| setKeystorePassword(toEnroll, userId); |
| } else { |
| // Should not happen |
| Slog.e(TAG, "Throttled while enrolling a password"); |
| } |
| return hash; |
| } |
| |
| private void setAuthlessUserKeyProtection(int userId, byte[] key) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "setAuthlessUserKeyProtectiond: user=" + userId); |
| addUserKeyAuth(userId, null, key); |
| } |
| |
| private void setUserKeyProtection(int userId, String credential, VerifyCredentialResponse vcr) |
| throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "setUserKeyProtection: user=" + userId); |
| if (vcr == null) { |
| throw new RemoteException("Null response verifying a credential we just set"); |
| } |
| if (vcr.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) { |
| throw new RemoteException("Non-OK response verifying a credential we just set: " |
| + vcr.getResponseCode()); |
| } |
| byte[] token = vcr.getPayload(); |
| if (token == null) { |
| throw new RemoteException("Empty payload verifying a credential we just set"); |
| } |
| addUserKeyAuth(userId, token, secretFromCredential(credential)); |
| } |
| |
| private void clearUserKeyProtection(int userId) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "clearUserKeyProtection user=" + userId); |
| addUserKeyAuth(userId, null, null); |
| } |
| |
| private static byte[] secretFromCredential(String credential) throws RemoteException { |
| try { |
| MessageDigest digest = MessageDigest.getInstance("SHA-512"); |
| // Personalize the hash |
| byte[] personalization = "Android FBE credential hash" |
| .getBytes(StandardCharsets.UTF_8); |
| // Pad it to the block size of the hash function |
| personalization = Arrays.copyOf(personalization, 128); |
| digest.update(personalization); |
| digest.update(credential.getBytes(StandardCharsets.UTF_8)); |
| return digest.digest(); |
| } catch (NoSuchAlgorithmException e) { |
| throw new RuntimeException("NoSuchAlgorithmException for SHA-512"); |
| } |
| } |
| |
| private void addUserKeyAuth(int userId, byte[] token, byte[] secret) |
| throws RemoteException { |
| final UserInfo userInfo = mUserManager.getUserInfo(userId); |
| final IStorageManager storageManager = mInjector.getStorageManager(); |
| final long callingId = Binder.clearCallingIdentity(); |
| try { |
| storageManager.addUserKeyAuth(userId, userInfo.serialNumber, token, secret); |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| private void fixateNewestUserKeyAuth(int userId) |
| throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "fixateNewestUserKeyAuth: user=" + userId); |
| final IStorageManager storageManager = mInjector.getStorageManager(); |
| final long callingId = Binder.clearCallingIdentity(); |
| try { |
| storageManager.fixateNewestUserKeyAuth(userId); |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| @Override |
| public void resetKeyStore(int userId) throws RemoteException { |
| checkWritePermission(userId); |
| if (DEBUG) Slog.v(TAG, "Reset keystore for user: " + userId); |
| int managedUserId = -1; |
| String managedUserDecryptedPassword = null; |
| final List<UserInfo> profiles = mUserManager.getProfiles(userId); |
| for (UserInfo pi : profiles) { |
| // Unlock managed profile with unified lock |
| if (pi.isManagedProfile() |
| && !mLockPatternUtils.isSeparateProfileChallengeEnabled(pi.id) |
| && mStorage.hasChildProfileLock(pi.id)) { |
| try { |
| if (managedUserId == -1) { |
| managedUserDecryptedPassword = getDecryptedPasswordForTiedProfile(pi.id); |
| managedUserId = pi.id; |
| } else { |
| // Should not happen |
| Slog.e(TAG, "More than one managed profile, uid1:" + managedUserId |
| + ", uid2:" + pi.id); |
| } |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| } |
| try { |
| // Clear all the users credentials could have been installed in for this user. |
| for (int profileId : mUserManager.getProfileIdsWithDisabled(userId)) { |
| for (int uid : SYSTEM_CREDENTIAL_UIDS) { |
| mKeyStore.clearUid(UserHandle.getUid(profileId, uid)); |
| } |
| } |
| } finally { |
| if (managedUserId != -1 && managedUserDecryptedPassword != null) { |
| if (DEBUG) Slog.v(TAG, "Restore tied profile lock"); |
| tieProfileLockToParent(managedUserId, managedUserDecryptedPassword); |
| } |
| } |
| } |
| |
| @Override |
| public VerifyCredentialResponse checkCredential(String credential, int type, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| return doVerifyCredential(credential, type, false, 0, userId, progressCallback); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyCredential(String credential, int type, long challenge, |
| int userId) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| return doVerifyCredential(credential, type, true, challenge, userId, |
| null /* progressCallback */); |
| } |
| |
| /** |
| * Verify user credential and unlock the user. Fix pattern bug by deprecating the old base zero |
| * format. |
| */ |
| private VerifyCredentialResponse doVerifyCredential(String credential, int credentialType, |
| boolean hasChallenge, long challenge, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| if (TextUtils.isEmpty(credential)) { |
| throw new IllegalArgumentException("Credential can't be null or empty"); |
| } |
| synchronized (mSpManager) { |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| VerifyCredentialResponse response = spBasedDoVerifyCredentialLocked(credential, |
| credentialType, hasChallenge, challenge, userId, progressCallback); |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| mStrongAuth.reportSuccessfulStrongAuthUnlock(userId); |
| } |
| return response; |
| } |
| } |
| CredentialHash storedHash = mStorage.readCredentialHash(userId); |
| if (storedHash.type != credentialType) { |
| Slog.wtf(TAG, "doVerifyCredential type mismatch with stored credential??" |
| + " stored: " + storedHash.type + " passed in: " + credentialType); |
| return VerifyCredentialResponse.ERROR; |
| } |
| |
| boolean shouldReEnrollBaseZero = storedHash.type == LockPatternUtils.CREDENTIAL_TYPE_PATTERN |
| && storedHash.isBaseZeroPattern; |
| |
| String credentialToVerify; |
| if (shouldReEnrollBaseZero) { |
| credentialToVerify = LockPatternUtils.patternStringToBaseZero(credential); |
| } else { |
| credentialToVerify = credential; |
| } |
| |
| VerifyCredentialResponse response = verifyCredential(userId, storedHash, credentialToVerify, |
| hasChallenge, challenge, progressCallback); |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| mStrongAuth.reportSuccessfulStrongAuthUnlock(userId); |
| if (shouldReEnrollBaseZero) { |
| setLockCredentialInternal(credential, storedHash.type, credentialToVerify, userId); |
| } |
| } |
| |
| return response; |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyTiedProfileChallenge(String credential, int type, |
| long challenge, int userId) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| if (!isManagedProfileWithUnifiedLock(userId)) { |
| throw new RemoteException("User id must be managed profile with unified lock"); |
| } |
| final int parentProfileId = mUserManager.getProfileParent(userId).id; |
| // Unlock parent by using parent's challenge |
| final VerifyCredentialResponse parentResponse = doVerifyCredential( |
| credential, |
| type, |
| true /* hasChallenge */, |
| challenge, |
| parentProfileId, |
| null /* progressCallback */); |
| if (parentResponse.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) { |
| // Failed, just return parent's response |
| return parentResponse; |
| } |
| |
| try { |
| // Unlock work profile, and work profile with unified lock must use password only |
| return doVerifyCredential(getDecryptedPasswordForTiedProfile(userId), |
| LockPatternUtils.CREDENTIAL_TYPE_PASSWORD, |
| true, |
| challenge, |
| userId, null /* progressCallback */); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| throw new RemoteException("Unable to get tied profile token"); |
| } |
| } |
| |
| /** |
| * Lowest-level credential verification routine that talks to GateKeeper. If verification |
| * passes, unlock the corresponding user and keystore. Also handles the migration from legacy |
| * hash to GK. |
| */ |
| private VerifyCredentialResponse verifyCredential(int userId, CredentialHash storedHash, |
| String credential, boolean hasChallenge, long challenge, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| if ((storedHash == null || storedHash.hash.length == 0) && TextUtils.isEmpty(credential)) { |
| // don't need to pass empty credentials to GateKeeper |
| return VerifyCredentialResponse.OK; |
| } |
| |
| if (storedHash == null || TextUtils.isEmpty(credential)) { |
| return VerifyCredentialResponse.ERROR; |
| } |
| |
| // We're potentially going to be doing a bunch of disk I/O below as part |
| // of unlocking the user, so yell if calling from the main thread. |
| StrictMode.noteDiskRead(); |
| |
| if (storedHash.version == CredentialHash.VERSION_LEGACY) { |
| final byte[] hash; |
| if (storedHash.type == LockPatternUtils.CREDENTIAL_TYPE_PATTERN) { |
| hash = LockPatternUtils.patternToHash(LockPatternUtils.stringToPattern(credential)); |
| } else { |
| hash = mLockPatternUtils.passwordToHash(credential, userId); |
| } |
| if (Arrays.equals(hash, storedHash.hash)) { |
| if (storedHash.type == LockPatternUtils.CREDENTIAL_TYPE_PATTERN) { |
| unlockKeystore(LockPatternUtils.patternStringToBaseZero(credential), userId); |
| } else { |
| unlockKeystore(credential, userId); |
| } |
| // Users with legacy credentials don't have credential-backed |
| // FBE keys, so just pass through a fake token/secret |
| Slog.i(TAG, "Unlocking user with fake token: " + userId); |
| final byte[] fakeToken = String.valueOf(userId).getBytes(); |
| unlockUser(userId, fakeToken, fakeToken); |
| |
| // migrate credential to GateKeeper |
| setLockCredentialInternal(credential, storedHash.type, null, userId); |
| if (!hasChallenge) { |
| notifyActivePasswordMetricsAvailable(credential, userId); |
| return VerifyCredentialResponse.OK; |
| } |
| // Fall through to get the auth token. Technically this should never happen, |
| // as a user that had a legacy credential would have to unlock their device |
| // before getting to a flow with a challenge, but supporting for consistency. |
| } else { |
| return VerifyCredentialResponse.ERROR; |
| } |
| } |
| GateKeeperResponse gateKeeperResponse = getGateKeeperService() |
| .verifyChallenge(userId, challenge, storedHash.hash, credential.getBytes()); |
| VerifyCredentialResponse response = convertResponse(gateKeeperResponse); |
| boolean shouldReEnroll = gateKeeperResponse.getShouldReEnroll(); |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| |
| // credential has matched |
| |
| if (progressCallback != null) { |
| progressCallback.onCredentialVerified(); |
| } |
| notifyActivePasswordMetricsAvailable(credential, userId); |
| unlockKeystore(credential, userId); |
| |
| Slog.i(TAG, "Unlocking user " + userId + " with token length " |
| + response.getPayload().length); |
| unlockUser(userId, response.getPayload(), secretFromCredential(credential)); |
| |
| if (isManagedProfileWithSeparatedLock(userId)) { |
| TrustManager trustManager = |
| (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE); |
| trustManager.setDeviceLockedForUser(userId, false); |
| } |
| if (shouldReEnroll) { |
| setLockCredentialInternal(credential, storedHash.type, credential, userId); |
| } else { |
| // Now that we've cleared of all required GK migration, let's do the final |
| // migration to synthetic password. |
| synchronized (mSpManager) { |
| if (shouldMigrateToSyntheticPasswordLocked(userId)) { |
| AuthenticationToken auth = initializeSyntheticPasswordLocked( |
| storedHash.hash, credential, storedHash.type, userId); |
| activateEscrowTokens(auth, userId); |
| } |
| } |
| } |
| } else if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_RETRY) { |
| if (response.getTimeout() > 0) { |
| requireStrongAuth(STRONG_AUTH_REQUIRED_AFTER_LOCKOUT, userId); |
| } |
| } |
| |
| return response; |
| } |
| |
| private void notifyActivePasswordMetricsAvailable(String password, @UserIdInt int userId) { |
| final PasswordMetrics metrics; |
| if (password == null) { |
| metrics = new PasswordMetrics(); |
| } else { |
| metrics = PasswordMetrics.computeForPassword(password); |
| metrics.quality = mLockPatternUtils.getKeyguardStoredPasswordQuality(userId); |
| } |
| |
| // Asynchronous to avoid dead lock |
| mHandler.post(() -> { |
| DevicePolicyManager dpm = (DevicePolicyManager) |
| mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); |
| dpm.setActivePasswordState(metrics, userId); |
| }); |
| } |
| |
| /** |
| * Call after {@link #notifyActivePasswordMetricsAvailable} so metrics are updated before |
| * reporting the password changed. |
| */ |
| private void notifyPasswordChanged(@UserIdInt int userId) { |
| // Same handler as notifyActivePasswordMetricsAvailable to ensure correct ordering |
| mHandler.post(() -> { |
| DevicePolicyManager dpm = (DevicePolicyManager) |
| mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); |
| dpm.reportPasswordChanged(userId); |
| }); |
| } |
| |
| @Override |
| public boolean checkVoldPassword(int userId) throws RemoteException { |
| if (!mFirstCallToVold) { |
| return false; |
| } |
| mFirstCallToVold = false; |
| |
| checkPasswordReadPermission(userId); |
| |
| // There's no guarantee that this will safely connect, but if it fails |
| // we will simply show the lock screen when we shouldn't, so relatively |
| // benign. There is an outside chance something nasty would happen if |
| // this service restarted before vold stales out the password in this |
| // case. The nastiness is limited to not showing the lock screen when |
| // we should, within the first minute of decrypting the phone if this |
| // service can't connect to vold, it restarts, and then the new instance |
| // does successfully connect. |
| final IStorageManager service = mInjector.getStorageManager(); |
| String password; |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| password = service.getPassword(); |
| service.clearPassword(); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| if (password == null) { |
| return false; |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPatternEnabled(userId)) { |
| if (checkCredential(password, LockPatternUtils.CREDENTIAL_TYPE_PATTERN, userId, |
| null /* progressCallback */) |
| .getResponseCode() == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPasswordEnabled(userId)) { |
| if (checkCredential(password, LockPatternUtils.CREDENTIAL_TYPE_PASSWORD, userId, |
| null /* progressCallback */) |
| .getResponseCode() == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| return false; |
| } |
| |
| private void removeUser(int userId, boolean unknownUser) { |
| mStorage.removeUser(userId); |
| mStrongAuth.removeUser(userId); |
| |
| final KeyStore ks = KeyStore.getInstance(); |
| ks.onUserRemoved(userId); |
| |
| try { |
| final IGateKeeperService gk = getGateKeeperService(); |
| if (gk != null) { |
| gk.clearSecureUserId(userId); |
| } |
| } catch (RemoteException ex) { |
| Slog.w(TAG, "unable to clear GK secure user id"); |
| } |
| if (unknownUser || mUserManager.getUserInfo(userId).isManagedProfile()) { |
| removeKeystoreProfileKey(userId); |
| } |
| } |
| |
| private void removeKeystoreProfileKey(int targetUserId) { |
| if (DEBUG) Slog.v(TAG, "Remove keystore profile key for user: " + targetUserId); |
| try { |
| java.security.KeyStore keyStore = java.security.KeyStore.getInstance("AndroidKeyStore"); |
| keyStore.load(null); |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_ENCRYPT + targetUserId); |
| keyStore.deleteEntry(LockPatternUtils.PROFILE_KEY_NAME_DECRYPT + targetUserId); |
| } catch (KeyStoreException | NoSuchAlgorithmException | CertificateException |
| | IOException e) { |
| // We have tried our best to remove all keys |
| Slog.e(TAG, "Unable to remove keystore profile key for user:" + targetUserId, e); |
| } |
| } |
| |
| @Override |
| public void registerStrongAuthTracker(IStrongAuthTracker tracker) { |
| checkPasswordReadPermission(UserHandle.USER_ALL); |
| mStrongAuth.registerStrongAuthTracker(tracker); |
| } |
| |
| @Override |
| public void unregisterStrongAuthTracker(IStrongAuthTracker tracker) { |
| checkPasswordReadPermission(UserHandle.USER_ALL); |
| mStrongAuth.unregisterStrongAuthTracker(tracker); |
| } |
| |
| @Override |
| public void requireStrongAuth(int strongAuthReason, int userId) { |
| checkWritePermission(userId); |
| mStrongAuth.requireStrongAuth(strongAuthReason, userId); |
| } |
| |
| @Override |
| public void userPresent(int userId) { |
| checkWritePermission(userId); |
| mStrongAuth.reportUnlock(userId); |
| } |
| |
| @Override |
| public int getStrongAuthForUser(int userId) { |
| checkPasswordReadPermission(userId); |
| return mStrongAuthTracker.getStrongAuthForUser(userId); |
| } |
| |
| private boolean isCallerShell() { |
| final int callingUid = Binder.getCallingUid(); |
| return callingUid == Process.SHELL_UID || callingUid == Process.ROOT_UID; |
| } |
| |
| private void enforceShell() { |
| if (!isCallerShell()) { |
| throw new SecurityException("Caller must be shell"); |
| } |
| } |
| |
| @Override |
| public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err, |
| String[] args, ShellCallback callback, ResultReceiver resultReceiver) |
| throws RemoteException { |
| enforceShell(); |
| final long origId = Binder.clearCallingIdentity(); |
| try { |
| (new LockSettingsShellCommand(mContext, new LockPatternUtils(mContext))).exec( |
| this, in, out, err, args, callback, resultReceiver); |
| } finally { |
| Binder.restoreCallingIdentity(origId); |
| } |
| } |
| |
| private static final String[] VALID_SETTINGS = new String[] { |
| LockPatternUtils.LOCKOUT_PERMANENT_KEY, |
| LockPatternUtils.LOCKOUT_ATTEMPT_DEADLINE, |
| LockPatternUtils.PATTERN_EVER_CHOSEN_KEY, |
| LockPatternUtils.PASSWORD_TYPE_KEY, |
| LockPatternUtils.PASSWORD_TYPE_ALTERNATE_KEY, |
| LockPatternUtils.LOCK_PASSWORD_SALT_KEY, |
| LockPatternUtils.DISABLE_LOCKSCREEN_KEY, |
| LockPatternUtils.LOCKSCREEN_OPTIONS, |
| LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, |
| LockPatternUtils.BIOMETRIC_WEAK_EVER_CHOSEN_KEY, |
| LockPatternUtils.LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, |
| LockPatternUtils.PASSWORD_HISTORY_KEY, |
| Secure.LOCK_PATTERN_ENABLED, |
| Secure.LOCK_BIOMETRIC_WEAK_FLAGS, |
| Secure.LOCK_PATTERN_VISIBLE, |
| Secure.LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED |
| }; |
| |
| // Reading these settings needs the contacts permission |
| private static final String[] READ_CONTACTS_PROTECTED_SETTINGS = new String[] { |
| Secure.LOCK_SCREEN_OWNER_INFO_ENABLED, |
| Secure.LOCK_SCREEN_OWNER_INFO |
| }; |
| |
| // Reading these settings needs the same permission as checking the password |
| private static final String[] READ_PASSWORD_PROTECTED_SETTINGS = new String[] { |
| LockPatternUtils.LOCK_PASSWORD_SALT_KEY, |
| LockPatternUtils.PASSWORD_HISTORY_KEY, |
| LockPatternUtils.PASSWORD_TYPE_KEY, |
| SEPARATE_PROFILE_CHALLENGE_KEY |
| }; |
| |
| private static final String[] SETTINGS_TO_BACKUP = new String[] { |
| Secure.LOCK_SCREEN_OWNER_INFO_ENABLED, |
| Secure.LOCK_SCREEN_OWNER_INFO |
| }; |
| |
| private class GateKeeperDiedRecipient implements IBinder.DeathRecipient { |
| @Override |
| public void binderDied() { |
| mGateKeeperService.asBinder().unlinkToDeath(this, 0); |
| mGateKeeperService = null; |
| } |
| } |
| |
| protected synchronized IGateKeeperService getGateKeeperService() |
| throws RemoteException { |
| if (mGateKeeperService != null) { |
| return mGateKeeperService; |
| } |
| |
| final IBinder service = ServiceManager.getService(Context.GATEKEEPER_SERVICE); |
| if (service != null) { |
| service.linkToDeath(new GateKeeperDiedRecipient(), 0); |
| mGateKeeperService = IGateKeeperService.Stub.asInterface(service); |
| return mGateKeeperService; |
| } |
| |
| Slog.e(TAG, "Unable to acquire GateKeeperService"); |
| return null; |
| } |
| |
| /** |
| * Precondition: vold and keystore unlocked. |
| * |
| * Create new synthetic password, set up synthetic password blob protected by the supplied |
| * user credential, and make the newly-created SP blob active. |
| * |
| * The invariant under a synthetic password is: |
| * 1. If user credential exists, then both vold and keystore and protected with keys derived |
| * from the synthetic password. |
| * 2. If user credential does not exist, vold and keystore protection are cleared. This is to |
| * make it consistent with current behaviour. It also allows ActivityManager to call |
| * unlockUser() with empty secret. |
| * 3. Once a user is migrated to have synthetic password, its value will never change, no matter |
| * whether the user changes his lockscreen PIN or clear/reset it. When the user clears its |
| * lockscreen PIN, we still maintain the existing synthetic password in a password blob |
| * protected by a default PIN. The only exception is when the DPC performs an untrusted |
| * credential change, in which case we have no way to derive the existing synthetic password |
| * and has to create a new one. |
| * 4. The user SID is linked with synthetic password, but its cleared/re-created when the user |
| * clears/re-creates his lockscreen PIN. |
| * |
| * |
| * Different cases of calling this method: |
| * 1. credentialHash != null |
| * This implies credential != null, a new SP blob will be provisioned, and existing SID |
| * migrated to associate with the new SP. |
| * This happens during a normal migration case when the user currently has password. |
| * |
| * 2. credentialhash == null and credential == null |
| * A new SP blob and a new SID will be created, while the user has no credentials. |
| * This can happens when we are activating an escrow token on a unsecured device, during |
| * which we want to create the SP structure with an empty user credential. |
| * |
| * 3. credentialhash == null and credential != null |
| * This is the untrusted credential reset, OR the user sets a new lockscreen password |
| * FOR THE FIRST TIME on a SP-enabled device. New credential and new SID will be created |
| */ |
| private AuthenticationToken initializeSyntheticPasswordLocked(byte[] credentialHash, |
| String credential, int credentialType, int userId) throws RemoteException { |
| Slog.i(TAG, "Initialize SyntheticPassword for user: " + userId); |
| AuthenticationToken auth = mSpManager.newSyntheticPasswordAndSid(getGateKeeperService(), |
| credentialHash, credential, userId); |
| if (auth == null) { |
| Slog.wtf(TAG, "initializeSyntheticPasswordLocked returns null auth token"); |
| return null; |
| } |
| long handle = mSpManager.createPasswordBasedSyntheticPassword(getGateKeeperService(), |
| credential, credentialType, auth, userId); |
| if (credential != null) { |
| if (credentialHash == null) { |
| // Since when initializing SP, we didn't provide an existing password handle |
| // for it to migrate SID, we need to create a new SID for the user. |
| mSpManager.newSidForUser(getGateKeeperService(), auth, userId); |
| } |
| mSpManager.verifyChallenge(getGateKeeperService(), auth, 0L, userId); |
| setAuthlessUserKeyProtection(userId, auth.deriveDiskEncryptionKey()); |
| setKeystorePassword(auth.deriveKeyStorePassword(), userId); |
| } else { |
| clearUserKeyProtection(userId); |
| setKeystorePassword(null, userId); |
| getGateKeeperService().clearSecureUserId(userId); |
| } |
| fixateNewestUserKeyAuth(userId); |
| setLong(SYNTHETIC_PASSWORD_HANDLE_KEY, handle, userId); |
| return auth; |
| } |
| |
| private long getSyntheticPasswordHandleLocked(int userId) { |
| try { |
| return getLong(SYNTHETIC_PASSWORD_HANDLE_KEY, 0, userId); |
| } catch (RemoteException e) { |
| return SyntheticPasswordManager.DEFAULT_HANDLE; |
| } |
| } |
| |
| private boolean isSyntheticPasswordBasedCredentialLocked(int userId) throws RemoteException { |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| // This is a global setting |
| long enabled = getLong(SYNTHETIC_PASSWORD_ENABLED_KEY, 0, UserHandle.USER_SYSTEM); |
| return enabled != 0 && handle != SyntheticPasswordManager.DEFAULT_HANDLE; |
| } |
| |
| private boolean shouldMigrateToSyntheticPasswordLocked(int userId) throws RemoteException { |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| // This is a global setting |
| long enabled = getLong(SYNTHETIC_PASSWORD_ENABLED_KEY, 0, UserHandle.USER_SYSTEM); |
| return enabled != 0 && handle == SyntheticPasswordManager.DEFAULT_HANDLE; |
| } |
| |
| private void enableSyntheticPasswordLocked() throws RemoteException { |
| setLong(SYNTHETIC_PASSWORD_ENABLED_KEY, 1, UserHandle.USER_SYSTEM); |
| } |
| |
| private VerifyCredentialResponse spBasedDoVerifyCredentialLocked(String userCredential, int |
| credentialType, boolean hasChallenge, long challenge, int userId, |
| ICheckCredentialProgressCallback progressCallback) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "spBasedDoVerifyCredentialLocked: user=" + userId); |
| if (credentialType == LockPatternUtils.CREDENTIAL_TYPE_NONE) { |
| userCredential = null; |
| } |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| AuthenticationResult authResult = mSpManager.unwrapPasswordBasedSyntheticPassword( |
| getGateKeeperService(), handle, userCredential, userId); |
| |
| VerifyCredentialResponse response = authResult.gkResponse; |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| // credential has matched |
| // perform verifyChallenge with synthetic password which generates the real auth |
| // token for the current user |
| response = mSpManager.verifyChallenge(getGateKeeperService(), authResult.authToken, |
| challenge, userId); |
| if (response.getResponseCode() != VerifyCredentialResponse.RESPONSE_OK) { |
| Slog.wtf(TAG, "verifyChallenge with SP failed."); |
| return VerifyCredentialResponse.ERROR; |
| } |
| if (progressCallback != null) { |
| progressCallback.onCredentialVerified(); |
| } |
| notifyActivePasswordMetricsAvailable(userCredential, userId); |
| unlockKeystore(authResult.authToken.deriveKeyStorePassword(), userId); |
| |
| final byte[] secret = authResult.authToken.deriveDiskEncryptionKey(); |
| Slog.i(TAG, "Unlocking user " + userId + " with secret only, length " + secret.length); |
| unlockUser(userId, null, secret); |
| |
| if (isManagedProfileWithSeparatedLock(userId)) { |
| TrustManager trustManager = |
| (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE); |
| trustManager.setDeviceLockedForUser(userId, false); |
| } |
| activateEscrowTokens(authResult.authToken, userId); |
| } else if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_RETRY) { |
| if (response.getTimeout() > 0) { |
| requireStrongAuth(STRONG_AUTH_REQUIRED_AFTER_LOCKOUT, userId); |
| } |
| } |
| |
| return response; |
| } |
| |
| /** |
| * Change the user's lockscreen password by creating a new SP blob and update the handle, based |
| * on an existing authentication token. Even though a new SP blob is created, the underlying |
| * synthetic password is never changed. |
| * |
| * When clearing credential, we keep the SP unchanged, but clear its password handle so its |
| * SID is gone. We also clear password from (software-based) keystore and vold, which will be |
| * added back when new password is set in future. |
| */ |
| private long setLockCredentialWithAuthTokenLocked(String credential, int credentialType, |
| AuthenticationToken auth, int userId) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "setLockCredentialWithAuthTokenLocked: user=" + userId); |
| long newHandle = mSpManager.createPasswordBasedSyntheticPassword(getGateKeeperService(), |
| credential, credentialType, auth, userId); |
| final Map<Integer, String> profilePasswords; |
| if (credential != null) { |
| // // not needed by synchronizeUnifiedWorkChallengeForProfiles() |
| profilePasswords = null; |
| |
| if (mSpManager.hasSidForUser(userId)) { |
| // We are changing password of a secured device, nothing more needed as |
| // createPasswordBasedSyntheticPassword has already taken care of maintaining |
| // the password handle and SID unchanged. |
| |
| //refresh auth token |
| mSpManager.verifyChallenge(getGateKeeperService(), auth, 0L, userId); |
| } else { |
| // A new password is set on a previously-unsecured device, we need to generate |
| // a new SID, and re-add keys to vold and keystore. |
| mSpManager.newSidForUser(getGateKeeperService(), auth, userId); |
| mSpManager.verifyChallenge(getGateKeeperService(), auth, 0L, userId); |
| setAuthlessUserKeyProtection(userId, auth.deriveDiskEncryptionKey()); |
| fixateNewestUserKeyAuth(userId); |
| setKeystorePassword(auth.deriveKeyStorePassword(), userId); |
| } |
| } else { |
| // Cache all profile password if they use unified work challenge. This will later be |
| // used to clear the profile's password in synchronizeUnifiedWorkChallengeForProfiles() |
| profilePasswords = getDecryptedPasswordsForAllTiedProfiles(userId); |
| |
| // we are clearing password of a secured device, so need to nuke SID as well. |
| mSpManager.clearSidForUser(userId); |
| getGateKeeperService().clearSecureUserId(userId); |
| // Clear key from vold so ActivityManager can just unlock the user with empty secret |
| // during boot. |
| clearUserKeyProtection(userId); |
| fixateNewestUserKeyAuth(userId); |
| setKeystorePassword(null, userId); |
| } |
| setLong(SYNTHETIC_PASSWORD_HANDLE_KEY, newHandle, userId); |
| synchronizeUnifiedWorkChallengeForProfiles(userId, profilePasswords); |
| return newHandle; |
| } |
| |
| private void spBasedSetLockCredentialInternalLocked(String credential, int credentialType, |
| String savedCredential, int userId) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "spBasedSetLockCredentialInternalLocked: user=" + userId); |
| if (isManagedProfileWithUnifiedLock(userId)) { |
| // get credential from keystore when managed profile has unified lock |
| try { |
| savedCredential = getDecryptedPasswordForTiedProfile(userId); |
| } catch (FileNotFoundException e) { |
| Slog.i(TAG, "Child profile key not found"); |
| } catch (UnrecoverableKeyException | InvalidKeyException | KeyStoreException |
| | NoSuchAlgorithmException | NoSuchPaddingException |
| | InvalidAlgorithmParameterException | IllegalBlockSizeException |
| | BadPaddingException | CertificateException | IOException e) { |
| Slog.e(TAG, "Failed to decrypt child profile key", e); |
| } |
| } |
| long handle = getSyntheticPasswordHandleLocked(userId); |
| AuthenticationResult authResult = mSpManager.unwrapPasswordBasedSyntheticPassword( |
| getGateKeeperService(), handle, savedCredential, userId); |
| VerifyCredentialResponse response = authResult.gkResponse; |
| AuthenticationToken auth = authResult.authToken; |
| if (auth != null) { |
| // We are performing a trusted credential change i.e. a correct existing credential |
| // is provided |
| setLockCredentialWithAuthTokenLocked(credential, credentialType, auth, userId); |
| mSpManager.destroyPasswordBasedSyntheticPassword(handle, userId); |
| } else if (response != null |
| && response.getResponseCode() == VerifyCredentialResponse.RESPONSE_ERROR){ |
| // We are performing an untrusted credential change i.e. by DevicePolicyManager. |
| // So provision a new SP and SID. This would invalidate existing escrow tokens. |
| // Still support this for now but this flow will be removed in the next release. |
| |
| Slog.w(TAG, "Untrusted credential change invoked"); |
| initializeSyntheticPasswordLocked(null, credential, credentialType, userId); |
| synchronizeUnifiedWorkChallengeForProfiles(userId, null); |
| mSpManager.destroyPasswordBasedSyntheticPassword(handle, userId); |
| } else /* response == null || responseCode == VerifyCredentialResponse.RESPONSE_RETRY */ { |
| Slog.w(TAG, "spBasedSetLockCredentialInternalLocked: " + |
| (response != null ? "rate limit exceeded" : "failed")); |
| return; |
| } |
| notifyActivePasswordMetricsAvailable(credential, userId); |
| |
| } |
| |
| @Override |
| public long addEscrowToken(byte[] token, int userId) throws RemoteException { |
| ensureCallerSystemUid(); |
| if (DEBUG) Slog.d(TAG, "addEscrowToken: user=" + userId); |
| synchronized (mSpManager) { |
| enableSyntheticPasswordLocked(); |
| // Migrate to synthetic password based credentials if the user has no password, |
| // the token can then be activated immediately. |
| AuthenticationToken auth = null; |
| if (!isUserSecure(userId)) { |
| if (shouldMigrateToSyntheticPasswordLocked(userId)) { |
| auth = initializeSyntheticPasswordLocked(null, null, |
| LockPatternUtils.CREDENTIAL_TYPE_NONE, userId); |
| } else /* isSyntheticPasswordBasedCredentialLocked(userId) */ { |
| long pwdHandle = getSyntheticPasswordHandleLocked(userId); |
| auth = mSpManager.unwrapPasswordBasedSyntheticPassword(getGateKeeperService(), |
| pwdHandle, null, userId).authToken; |
| } |
| } |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| disableEscrowTokenOnNonManagedDevicesIfNeeded(userId); |
| if (!mSpManager.hasEscrowData(userId)) { |
| throw new SecurityException("Escrow token is disabled on the current user"); |
| } |
| } |
| long handle = mSpManager.createTokenBasedSyntheticPassword(token, userId); |
| if (auth != null) { |
| mSpManager.activateTokenBasedSyntheticPassword(handle, auth, userId); |
| } |
| return handle; |
| } |
| } |
| |
| private void activateEscrowTokens(AuthenticationToken auth, int userId) throws RemoteException { |
| if (DEBUG) Slog.d(TAG, "activateEscrowTokens: user=" + userId); |
| disableEscrowTokenOnNonManagedDevicesIfNeeded(userId); |
| synchronized (mSpManager) { |
| for (long handle : mSpManager.getPendingTokensForUser(userId)) { |
| Slog.i(TAG, String.format("activateEscrowTokens: %x %d ", handle, userId)); |
| mSpManager.activateTokenBasedSyntheticPassword(handle, auth, userId); |
| } |
| } |
| } |
| |
| @Override |
| public boolean isEscrowTokenActive(long handle, int userId) throws RemoteException { |
| ensureCallerSystemUid(); |
| synchronized (mSpManager) { |
| return mSpManager.existsHandle(handle, userId); |
| } |
| } |
| |
| @Override |
| public boolean removeEscrowToken(long handle, int userId) throws RemoteException { |
| ensureCallerSystemUid(); |
| synchronized (mSpManager) { |
| if (handle == getSyntheticPasswordHandleLocked(userId)) { |
| Slog.w(TAG, "Cannot remove password handle"); |
| return false; |
| } |
| if (mSpManager.removePendingToken(handle, userId)) { |
| return true; |
| } |
| if (mSpManager.existsHandle(handle, userId)) { |
| mSpManager.destroyTokenBasedSyntheticPassword(handle, userId); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } |
| |
| @Override |
| public boolean setLockCredentialWithToken(String credential, int type, long tokenHandle, |
| byte[] token, int userId) throws RemoteException { |
| ensureCallerSystemUid(); |
| boolean result; |
| synchronized (mSpManager) { |
| if (!mSpManager.hasEscrowData(userId)) { |
| throw new SecurityException("Escrow token is disabled on the current user"); |
| } |
| result = setLockCredentialWithTokenInternal(credential, type, tokenHandle, token, |
| userId); |
| } |
| if (result) { |
| synchronized (mSeparateChallengeLock) { |
| setSeparateProfileChallengeEnabled(userId, true, null); |
| } |
| notifyPasswordChanged(userId); |
| } |
| return result; |
| } |
| |
| private boolean setLockCredentialWithTokenInternal(String credential, int type, |
| long tokenHandle, byte[] token, int userId) throws RemoteException { |
| synchronized (mSpManager) { |
| AuthenticationResult result = mSpManager.unwrapTokenBasedSyntheticPassword( |
| getGateKeeperService(), tokenHandle, token, userId); |
| if (result.authToken == null) { |
| Slog.w(TAG, "Invalid escrow token supplied"); |
| return false; |
| } |
| long oldHandle = getSyntheticPasswordHandleLocked(userId); |
| setLockCredentialWithAuthTokenLocked(credential, type, result.authToken, userId); |
| mSpManager.destroyPasswordBasedSyntheticPassword(oldHandle, userId); |
| return true; |
| } |
| } |
| |
| @Override |
| public void unlockUserWithToken(long tokenHandle, byte[] token, int userId) |
| throws RemoteException { |
| ensureCallerSystemUid(); |
| AuthenticationResult authResult; |
| synchronized (mSpManager) { |
| if (!mSpManager.hasEscrowData(userId)) { |
| throw new SecurityException("Escrow token is disabled on the current user"); |
| } |
| authResult = mSpManager.unwrapTokenBasedSyntheticPassword(getGateKeeperService(), |
| tokenHandle, token, userId); |
| if (authResult.authToken == null) { |
| Slog.w(TAG, "Invalid escrow token supplied"); |
| return; |
| } |
| } |
| unlockUser(userId, null, authResult.authToken.deriveDiskEncryptionKey()); |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args){ |
| if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) return; |
| |
| synchronized (this) { |
| pw.println("Current lock settings service state:"); |
| pw.println(String.format("SP Enabled = %b", |
| mLockPatternUtils.isSyntheticPasswordEnabled())); |
| |
| List<UserInfo> users = mUserManager.getUsers(); |
| for (int user = 0; user < users.size(); user++) { |
| final int userId = users.get(user).id; |
| pw.println(" User " + userId); |
| pw.println(String.format(" SP Handle = %x", |
| getSyntheticPasswordHandleLocked(userId))); |
| try { |
| pw.println(String.format(" SID = %x", |
| getGateKeeperService().getSecureUserId(userId))); |
| } catch (RemoteException e) { |
| // ignore. |
| } |
| } |
| } |
| } |
| |
| private void disableEscrowTokenOnNonManagedDevicesIfNeeded(int userId) { |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| // Managed profile should have escrow enabled |
| if (mUserManager.getUserInfo(userId).isManagedProfile()) { |
| Slog.i(TAG, "Managed profile can have escrow token"); |
| return; |
| } |
| DevicePolicyManager dpm = mInjector.getDevicePolicyManager(); |
| // Devices with Device Owner should have escrow enabled on all users. |
| if (dpm.getDeviceOwnerComponentOnAnyUser() != null) { |
| Slog.i(TAG, "Corp-owned device can have escrow token"); |
| return; |
| } |
| // We could also have a profile owner on the given (non-managed) user for unicorn cases |
| if (dpm.getProfileOwnerAsUser(userId) != null) { |
| Slog.i(TAG, "User with profile owner can have escrow token"); |
| return; |
| } |
| // If the device is yet to be provisioned (still in SUW), there is still |
| // a chance that Device Owner will be set on the device later, so postpone |
| // disabling escrow token for now. |
| if (!dpm.isDeviceProvisioned()) { |
| Slog.i(TAG, "Postpone disabling escrow tokens until device is provisioned"); |
| return; |
| } |
| |
| // Escrow tokens are enabled on automotive builds. |
| if (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) { |
| return; |
| } |
| |
| // Disable escrow token permanently on all other device/user types. |
| Slog.i(TAG, "Disabling escrow token on user " + userId); |
| if (isSyntheticPasswordBasedCredentialLocked(userId)) { |
| mSpManager.destroyEscrowData(userId); |
| } |
| } catch (RemoteException e) { |
| Slog.e(TAG, "disableEscrowTokenOnNonManagedDevices", e); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private void ensureCallerSystemUid() throws SecurityException { |
| final int callingUid = mInjector.binderGetCallingUid(); |
| if (callingUid != Process.SYSTEM_UID) { |
| throw new SecurityException("Only system can call this API."); |
| } |
| } |
| } |