| /* |
| * 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 android.app.admin.DevicePolicyManager; |
| import android.app.backup.BackupManager; |
| import android.app.trust.IStrongAuthTracker; |
| 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 static android.Manifest.permission.ACCESS_KEYGUARD_SECURE_STORAGE; |
| import static android.content.Context.USER_SERVICE; |
| import static android.Manifest.permission.READ_CONTACTS; |
| import static com.android.internal.widget.LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_LOCKOUT; |
| |
| import android.database.sqlite.SQLiteDatabase; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.storage.IMountService; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| import android.provider.Settings.Secure; |
| import android.provider.Settings.SettingNotFoundException; |
| import android.security.KeyStore; |
| import android.service.gatekeeper.GateKeeperResponse; |
| import android.service.gatekeeper.IGateKeeperService; |
| import android.text.TextUtils; |
| import android.util.Slog; |
| |
| import com.android.internal.util.ArrayUtils; |
| 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 java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * 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 PERMISSION = ACCESS_KEYGUARD_SECURE_STORAGE; |
| |
| private static final String TAG = "LockSettingsService"; |
| |
| private final Context mContext; |
| |
| private final LockSettingsStorage mStorage; |
| private final LockSettingsStrongAuth mStrongAuth = new LockSettingsStrongAuth(); |
| |
| private LockPatternUtils mLockPatternUtils; |
| private boolean mFirstCallToVold; |
| private IGateKeeperService mGateKeeperService; |
| |
| private interface CredentialUtil { |
| void setCredential(String credential, String savedCredential, int userId) |
| throws RemoteException; |
| byte[] toHash(String credential, int userId); |
| String adjustForKeystore(String credential); |
| } |
| |
| public LockSettingsService(Context context) { |
| mContext = context; |
| // Open the database |
| |
| mLockPatternUtils = new LockPatternUtils(context); |
| mFirstCallToVold = true; |
| |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_USER_ADDED); |
| filter.addAction(Intent.ACTION_USER_STARTING); |
| filter.addAction(Intent.ACTION_USER_REMOVED); |
| filter.addAction(Intent.ACTION_USER_PRESENT); |
| mContext.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, null, null); |
| |
| mStorage = new LockSettingsStorage(context, 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) { |
| mStorage.writeKeyValue(db, LockPatternUtils.DISABLE_LOCKSCREEN_KEY, "1", 0); |
| } |
| } |
| }); |
| } |
| |
| 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); |
| final KeyStore ks = KeyStore.getInstance(); |
| final UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| final UserInfo parentInfo = um.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_PRESENT.equals(intent.getAction())) { |
| mStrongAuth.reportUnlock(getSendingUserId()); |
| } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { |
| final int userHandle = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (userHandle > 0) { |
| removeUser(userHandle); |
| } |
| } |
| } |
| }; |
| |
| public void systemReady() { |
| migrateOldData(); |
| try { |
| getGateKeeperService(); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Failure retrieving IGateKeeperService", e); |
| } |
| mStorage.prefetchUser(UserHandle.USER_OWNER); |
| } |
| |
| 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 UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| final ContentResolver cr = mContext.getContentResolver(); |
| List<UserInfo> users = um.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 (ownerInfo != null) { |
| setString(OWNER_INFO, ownerInfo, userId); |
| Settings.Secure.putStringForUser(cr, ownerInfo, "", 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) { |
| final UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| List<UserInfo> users = um.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 UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| |
| final List<UserInfo> users = um.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"); |
| } |
| } 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 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 { |
| // Do we need a permissions check here? |
| |
| return mStorage.hasPassword(userId); |
| } |
| |
| @Override |
| public boolean havePattern(int userId) throws RemoteException { |
| // Do we need a permissions check here? |
| |
| return mStorage.hasPattern(userId); |
| } |
| |
| private void setKeystorePassword(String password, int userHandle) { |
| final UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| final KeyStore ks = KeyStore.getInstance(); |
| |
| final List<UserInfo> profiles = um.getProfiles(userHandle); |
| for (UserInfo pi : profiles) { |
| ks.onUserPasswordChanged(pi.id, password); |
| } |
| } |
| |
| private void unlockKeystore(String password, int userHandle) { |
| final UserManager um = (UserManager) mContext.getSystemService(USER_SERVICE); |
| final KeyStore ks = KeyStore.getInstance(); |
| |
| final List<UserInfo> profiles = um.getProfiles(userHandle); |
| for (UserInfo pi : profiles) { |
| ks.unlock(pi.id, password); |
| } |
| } |
| |
| |
| private byte[] getCurrentHandle(int userId) { |
| CredentialHash credential; |
| byte[] currentHandle; |
| |
| int currentHandleType = mStorage.getStoredCredentialType(userId); |
| switch (currentHandleType) { |
| case CredentialHash.TYPE_PATTERN: |
| credential = mStorage.readPatternHash(userId); |
| currentHandle = credential != null |
| ? credential.hash |
| : null; |
| break; |
| case CredentialHash.TYPE_PASSWORD: |
| credential = mStorage.readPasswordHash(userId); |
| currentHandle = credential != null |
| ? credential.hash |
| : null; |
| break; |
| case CredentialHash.TYPE_NONE: |
| default: |
| currentHandle = null; |
| break; |
| } |
| |
| // sanity check |
| if (currentHandleType != CredentialHash.TYPE_NONE && currentHandle == null) { |
| Slog.e(TAG, "Stored handle type [" + currentHandleType + "] but no handle available"); |
| } |
| |
| return currentHandle; |
| } |
| |
| |
| @Override |
| public void setLockPattern(String pattern, String savedCredential, int userId) |
| throws RemoteException { |
| byte[] currentHandle = getCurrentHandle(userId); |
| |
| if (pattern == null) { |
| getGateKeeperService().clearSecureUserId(userId); |
| mStorage.writePatternHash(null, userId); |
| setKeystorePassword(null, userId); |
| return; |
| } |
| |
| if (currentHandle == null) { |
| if (savedCredential != null) { |
| Slog.w(TAG, "Saved credential provided, but none stored"); |
| } |
| savedCredential = null; |
| } |
| |
| byte[] enrolledHandle = enrollCredential(currentHandle, savedCredential, pattern, userId); |
| if (enrolledHandle != null) { |
| mStorage.writePatternHash(enrolledHandle, userId); |
| } else { |
| Slog.e(TAG, "Failed to enroll pattern"); |
| } |
| } |
| |
| |
| @Override |
| public void setLockPassword(String password, String savedCredential, int userId) |
| throws RemoteException { |
| byte[] currentHandle = getCurrentHandle(userId); |
| |
| if (password == null) { |
| getGateKeeperService().clearSecureUserId(userId); |
| mStorage.writePasswordHash(null, userId); |
| setKeystorePassword(null, userId); |
| return; |
| } |
| |
| if (currentHandle == null) { |
| if (savedCredential != null) { |
| Slog.w(TAG, "Saved credential provided, but none stored"); |
| } |
| savedCredential = null; |
| } |
| |
| byte[] enrolledHandle = enrollCredential(currentHandle, savedCredential, password, userId); |
| if (enrolledHandle != null) { |
| mStorage.writePasswordHash(enrolledHandle, userId); |
| } else { |
| Slog.e(TAG, "Failed to enroll password"); |
| } |
| } |
| |
| 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; |
| } |
| |
| @Override |
| public VerifyCredentialResponse checkPattern(String pattern, int userId) throws RemoteException { |
| return doVerifyPattern(pattern, false, 0, userId); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyPattern(String pattern, long challenge, int userId) |
| throws RemoteException { |
| return doVerifyPattern(pattern, true, challenge, userId); |
| } |
| |
| private VerifyCredentialResponse doVerifyPattern(String pattern, boolean hasChallenge, |
| long challenge, int userId) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| CredentialHash storedHash = mStorage.readPatternHash(userId); |
| boolean shouldReEnrollBaseZero = storedHash != null && storedHash.isBaseZeroPattern; |
| |
| String patternToVerify; |
| if (shouldReEnrollBaseZero) { |
| patternToVerify = LockPatternUtils.patternStringToBaseZero(pattern); |
| } else { |
| patternToVerify = pattern; |
| } |
| |
| VerifyCredentialResponse response = verifyCredential(userId, storedHash, patternToVerify, |
| hasChallenge, challenge, |
| new CredentialUtil() { |
| @Override |
| public void setCredential(String pattern, String oldPattern, int userId) |
| throws RemoteException { |
| setLockPattern(pattern, oldPattern, userId); |
| } |
| |
| @Override |
| public byte[] toHash(String pattern, int userId) { |
| return LockPatternUtils.patternToHash( |
| LockPatternUtils.stringToPattern(pattern)); |
| } |
| |
| @Override |
| public String adjustForKeystore(String pattern) { |
| return LockPatternUtils.patternStringToBaseZero(pattern); |
| } |
| } |
| ); |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK |
| && shouldReEnrollBaseZero) { |
| setLockPattern(pattern, patternToVerify, userId); |
| } |
| |
| return response; |
| |
| } |
| |
| @Override |
| public VerifyCredentialResponse checkPassword(String password, int userId) |
| throws RemoteException { |
| return doVerifyPassword(password, false, 0, userId); |
| } |
| |
| @Override |
| public VerifyCredentialResponse verifyPassword(String password, long challenge, int userId) |
| throws RemoteException { |
| return doVerifyPassword(password, true, challenge, userId); |
| } |
| |
| private VerifyCredentialResponse doVerifyPassword(String password, boolean hasChallenge, |
| long challenge, int userId) throws RemoteException { |
| checkPasswordReadPermission(userId); |
| CredentialHash storedHash = mStorage.readPasswordHash(userId); |
| return verifyCredential(userId, storedHash, password, hasChallenge, challenge, |
| new CredentialUtil() { |
| @Override |
| public void setCredential(String password, String oldPassword, int userId) |
| throws RemoteException { |
| setLockPassword(password, oldPassword, userId); |
| } |
| |
| @Override |
| public byte[] toHash(String password, int userId) { |
| return mLockPatternUtils.passwordToHash(password, userId); |
| } |
| |
| @Override |
| public String adjustForKeystore(String password) { |
| return password; |
| } |
| } |
| ); |
| } |
| |
| private VerifyCredentialResponse verifyCredential(int userId, CredentialHash storedHash, |
| String credential, boolean hasChallenge, long challenge, CredentialUtil credentialUtil) |
| 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 (TextUtils.isEmpty(credential)) { |
| return VerifyCredentialResponse.ERROR; |
| } |
| |
| if (storedHash.version == CredentialHash.VERSION_LEGACY) { |
| byte[] hash = credentialUtil.toHash(credential, userId); |
| if (Arrays.equals(hash, storedHash.hash)) { |
| unlockKeystore(credentialUtil.adjustForKeystore(credential), userId); |
| // migrate credential to GateKeeper |
| credentialUtil.setCredential(credential, null, userId); |
| if (!hasChallenge) { |
| 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; |
| } |
| } |
| |
| VerifyCredentialResponse response; |
| boolean shouldReEnroll = false;; |
| if (hasChallenge) { |
| byte[] token = null; |
| GateKeeperResponse gateKeeperResponse = getGateKeeperService() |
| .verifyChallenge(userId, challenge, storedHash.hash, credential.getBytes()); |
| int responseCode = gateKeeperResponse.getResponseCode(); |
| if (responseCode == GateKeeperResponse.RESPONSE_RETRY) { |
| response = new VerifyCredentialResponse(gateKeeperResponse.getTimeout()); |
| } else if (responseCode == GateKeeperResponse.RESPONSE_OK) { |
| 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 { |
| shouldReEnroll = gateKeeperResponse.getShouldReEnroll(); |
| response = new VerifyCredentialResponse(token); |
| } |
| } else { |
| response = VerifyCredentialResponse.ERROR; |
| } |
| } else { |
| GateKeeperResponse gateKeeperResponse = getGateKeeperService().verify( |
| userId, storedHash.hash, credential.getBytes()); |
| int responseCode = gateKeeperResponse.getResponseCode(); |
| if (responseCode == GateKeeperResponse.RESPONSE_RETRY) { |
| response = new VerifyCredentialResponse(gateKeeperResponse.getTimeout()); |
| } else if (responseCode == GateKeeperResponse.RESPONSE_OK) { |
| shouldReEnroll = gateKeeperResponse.getShouldReEnroll(); |
| response = VerifyCredentialResponse.OK; |
| } else { |
| response = VerifyCredentialResponse.ERROR; |
| } |
| } |
| |
| if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_OK) { |
| // credential has matched |
| unlockKeystore(credential, userId); |
| if (shouldReEnroll) { |
| credentialUtil.setCredential(credential, credential, userId); |
| } |
| } else if (response.getResponseCode() == VerifyCredentialResponse.RESPONSE_RETRY) { |
| if (response.getTimeout() > 0) { |
| requireStrongAuth(STRONG_AUTH_REQUIRED_AFTER_LOCKOUT, userId); |
| } |
| } |
| |
| return response; |
| } |
| |
| @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 IMountService service = getMountService(); |
| String password = service.getPassword(); |
| service.clearPassword(); |
| if (password == null) { |
| return false; |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPatternEnabled(userId)) { |
| if (checkPattern(password, userId).getResponseCode() |
| == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| try { |
| if (mLockPatternUtils.isLockPasswordEnabled(userId)) { |
| if (checkPassword(password, userId).getResponseCode() |
| == GateKeeperResponse.RESPONSE_OK) { |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| } |
| |
| return false; |
| } |
| |
| private void removeUser(int userId) { |
| 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"); |
| } |
| } |
| |
| @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); |
| } |
| |
| 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, |
| }; |
| |
| private static final String[] SETTINGS_TO_BACKUP = new String[] { |
| Secure.LOCK_SCREEN_OWNER_INFO_ENABLED, |
| Secure.LOCK_SCREEN_OWNER_INFO |
| }; |
| |
| private IMountService getMountService() { |
| final IBinder service = ServiceManager.getService("mount"); |
| if (service != null) { |
| return IMountService.Stub.asInterface(service); |
| } |
| return null; |
| } |
| |
| private class GateKeeperDiedRecipient implements IBinder.DeathRecipient { |
| @Override |
| public void binderDied() { |
| mGateKeeperService.asBinder().unlinkToDeath(this, 0); |
| mGateKeeperService = null; |
| } |
| } |
| |
| private synchronized IGateKeeperService getGateKeeperService() |
| throws RemoteException { |
| if (mGateKeeperService != null) { |
| return mGateKeeperService; |
| } |
| |
| final IBinder service = |
| ServiceManager.getService("android.service.gatekeeper.IGateKeeperService"); |
| if (service != null) { |
| service.linkToDeath(new GateKeeperDiedRecipient(), 0); |
| mGateKeeperService = IGateKeeperService.Stub.asInterface(service); |
| return mGateKeeperService; |
| } |
| |
| Slog.e(TAG, "Unable to acquire GateKeeperService"); |
| return null; |
| } |
| } |
