53a56ad89c
* commit '447415f4f17dc91d3844394625f4e6fa10efedad': Make sure that external callers cannot pass in the confirm bypass extra
426 lines
20 KiB
Java
426 lines
20 KiB
Java
/*
|
|
* Copyright (C) 2010 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.settings;
|
|
|
|
import android.app.Activity;
|
|
import android.app.PendingIntent;
|
|
import android.app.admin.DevicePolicyManager;
|
|
import android.content.Context;
|
|
import android.content.Intent;
|
|
import android.content.pm.UserInfo;
|
|
import android.os.Bundle;
|
|
import android.os.UserManager;
|
|
import android.preference.Preference;
|
|
import android.preference.PreferenceActivity;
|
|
import android.preference.PreferenceScreen;
|
|
import android.security.KeyStore;
|
|
import android.view.LayoutInflater;
|
|
import android.view.View;
|
|
import android.view.ViewGroup;
|
|
import android.widget.ListView;
|
|
|
|
import com.android.internal.widget.LockPatternUtils;
|
|
|
|
import java.util.List;
|
|
|
|
import libcore.util.MutableBoolean;
|
|
|
|
public class ChooseLockGeneric extends PreferenceActivity {
|
|
|
|
@Override
|
|
public Intent getIntent() {
|
|
Intent modIntent = new Intent(super.getIntent());
|
|
modIntent.putExtra(EXTRA_SHOW_FRAGMENT, ChooseLockGenericFragment.class.getName());
|
|
modIntent.putExtra(EXTRA_NO_HEADERS, true);
|
|
return modIntent;
|
|
}
|
|
|
|
public static class InternalActivity extends ChooseLockGeneric {
|
|
}
|
|
|
|
public static class ChooseLockGenericFragment extends SettingsPreferenceFragment {
|
|
private static final int MIN_PASSWORD_LENGTH = 4;
|
|
private static final String KEY_UNLOCK_BACKUP_INFO = "unlock_backup_info";
|
|
private static final String KEY_UNLOCK_SET_OFF = "unlock_set_off";
|
|
private static final String KEY_UNLOCK_SET_NONE = "unlock_set_none";
|
|
private static final String KEY_UNLOCK_SET_BIOMETRIC_WEAK = "unlock_set_biometric_weak";
|
|
private static final String KEY_UNLOCK_SET_PIN = "unlock_set_pin";
|
|
private static final String KEY_UNLOCK_SET_PASSWORD = "unlock_set_password";
|
|
private static final String KEY_UNLOCK_SET_PATTERN = "unlock_set_pattern";
|
|
private static final int CONFIRM_EXISTING_REQUEST = 100;
|
|
private static final int FALLBACK_REQUEST = 101;
|
|
private static final String PASSWORD_CONFIRMED = "password_confirmed";
|
|
private static final String CONFIRM_CREDENTIALS = "confirm_credentials";
|
|
private static final String WAITING_FOR_CONFIRMATION = "waiting_for_confirmation";
|
|
private static final String FINISH_PENDING = "finish_pending";
|
|
public static final String MINIMUM_QUALITY_KEY = "minimum_quality";
|
|
|
|
private static final boolean ALWAY_SHOW_TUTORIAL = true;
|
|
|
|
private ChooseLockSettingsHelper mChooseLockSettingsHelper;
|
|
private DevicePolicyManager mDPM;
|
|
private KeyStore mKeyStore;
|
|
private boolean mPasswordConfirmed = false;
|
|
private boolean mWaitingForConfirmation = false;
|
|
private boolean mFinishPending = false;
|
|
|
|
@Override
|
|
public void onCreate(Bundle savedInstanceState) {
|
|
super.onCreate(savedInstanceState);
|
|
|
|
mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
|
|
mKeyStore = KeyStore.getInstance();
|
|
mChooseLockSettingsHelper = new ChooseLockSettingsHelper(this.getActivity());
|
|
|
|
// Defaults to needing to confirm credentials
|
|
final boolean confirmCredentials = getActivity().getIntent()
|
|
.getBooleanExtra(CONFIRM_CREDENTIALS, true);
|
|
if (getActivity() instanceof ChooseLockGeneric.InternalActivity) {
|
|
mPasswordConfirmed = !confirmCredentials;
|
|
}
|
|
|
|
if (savedInstanceState != null) {
|
|
mPasswordConfirmed = savedInstanceState.getBoolean(PASSWORD_CONFIRMED);
|
|
mWaitingForConfirmation = savedInstanceState.getBoolean(WAITING_FOR_CONFIRMATION);
|
|
mFinishPending = savedInstanceState.getBoolean(FINISH_PENDING);
|
|
}
|
|
|
|
if (mPasswordConfirmed) {
|
|
updatePreferencesOrFinish();
|
|
} else if (!mWaitingForConfirmation) {
|
|
ChooseLockSettingsHelper helper =
|
|
new ChooseLockSettingsHelper(this.getActivity(), this);
|
|
if (!helper.launchConfirmationActivity(CONFIRM_EXISTING_REQUEST, null, null)) {
|
|
mPasswordConfirmed = true; // no password set, so no need to confirm
|
|
updatePreferencesOrFinish();
|
|
} else {
|
|
mWaitingForConfirmation = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onResume() {
|
|
super.onResume();
|
|
if (mFinishPending) {
|
|
mFinishPending = false;
|
|
finish();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
|
|
Preference preference) {
|
|
final String key = preference.getKey();
|
|
boolean handled = true;
|
|
if (KEY_UNLOCK_SET_OFF.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, true);
|
|
} else if (KEY_UNLOCK_SET_NONE.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, false);
|
|
} else if (KEY_UNLOCK_SET_BIOMETRIC_WEAK.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, false);
|
|
}else if (KEY_UNLOCK_SET_PATTERN.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_SOMETHING, false);
|
|
} else if (KEY_UNLOCK_SET_PIN.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_NUMERIC, false);
|
|
} else if (KEY_UNLOCK_SET_PASSWORD.equals(key)) {
|
|
updateUnlockMethodAndFinish(
|
|
DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC, false);
|
|
} else {
|
|
handled = false;
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
@Override
|
|
public View onCreateView(LayoutInflater inflater, ViewGroup container,
|
|
Bundle savedInstanceState) {
|
|
View v = super.onCreateView(inflater, container, savedInstanceState);
|
|
final boolean onlyShowFallback = getActivity().getIntent()
|
|
.getBooleanExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, false);
|
|
if (onlyShowFallback) {
|
|
View header = v.inflate(getActivity(),
|
|
R.layout.weak_biometric_fallback_header, null);
|
|
((ListView) v.findViewById(android.R.id.list)).addHeaderView(header, null, false);
|
|
}
|
|
|
|
return v;
|
|
}
|
|
|
|
@Override
|
|
public void onActivityResult(int requestCode, int resultCode, Intent data) {
|
|
super.onActivityResult(requestCode, resultCode, data);
|
|
mWaitingForConfirmation = false;
|
|
if (requestCode == CONFIRM_EXISTING_REQUEST && resultCode == Activity.RESULT_OK) {
|
|
mPasswordConfirmed = true;
|
|
updatePreferencesOrFinish();
|
|
} else if(requestCode == FALLBACK_REQUEST) {
|
|
mChooseLockSettingsHelper.utils().deleteTempGallery();
|
|
getActivity().setResult(resultCode);
|
|
finish();
|
|
} else {
|
|
getActivity().setResult(Activity.RESULT_CANCELED);
|
|
finish();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onSaveInstanceState(Bundle outState) {
|
|
super.onSaveInstanceState(outState);
|
|
// Saved so we don't force user to re-enter their password if configuration changes
|
|
outState.putBoolean(PASSWORD_CONFIRMED, mPasswordConfirmed);
|
|
outState.putBoolean(WAITING_FOR_CONFIRMATION, mWaitingForConfirmation);
|
|
outState.putBoolean(FINISH_PENDING, mFinishPending);
|
|
}
|
|
|
|
private void updatePreferencesOrFinish() {
|
|
Intent intent = getActivity().getIntent();
|
|
int quality = intent.getIntExtra(LockPatternUtils.PASSWORD_TYPE_KEY, -1);
|
|
if (quality == -1) {
|
|
// If caller didn't specify password quality, show UI and allow the user to choose.
|
|
quality = intent.getIntExtra(MINIMUM_QUALITY_KEY, -1);
|
|
MutableBoolean allowBiometric = new MutableBoolean(false);
|
|
quality = upgradeQuality(quality, allowBiometric);
|
|
final PreferenceScreen prefScreen = getPreferenceScreen();
|
|
if (prefScreen != null) {
|
|
prefScreen.removeAll();
|
|
}
|
|
addPreferencesFromResource(R.xml.security_settings_picker);
|
|
disableUnusablePreferences(quality, allowBiometric);
|
|
} else {
|
|
updateUnlockMethodAndFinish(quality, false);
|
|
}
|
|
}
|
|
|
|
/** increases the quality if necessary, and returns whether biometric is allowed */
|
|
private int upgradeQuality(int quality, MutableBoolean allowBiometric) {
|
|
quality = upgradeQualityForDPM(quality);
|
|
quality = upgradeQualityForKeyStore(quality);
|
|
int encryptionQuality = upgradeQualityForEncryption(quality);
|
|
if (encryptionQuality > quality) {
|
|
//The first case checks whether biometric is allowed, prior to the user making
|
|
//their selection from the list
|
|
if (allowBiometric != null) {
|
|
allowBiometric.value = quality <=
|
|
DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK;
|
|
} else if (quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) {
|
|
//When the user has selected biometric we shouldn't change that due to
|
|
//encryption
|
|
return quality;
|
|
}
|
|
}
|
|
return encryptionQuality;
|
|
}
|
|
|
|
private int upgradeQualityForDPM(int quality) {
|
|
// Compare min allowed password quality
|
|
int minQuality = mDPM.getPasswordQuality(null);
|
|
if (quality < minQuality) {
|
|
quality = minQuality;
|
|
}
|
|
return quality;
|
|
}
|
|
|
|
/**
|
|
* Mix in "encryption minimums" to any given quality value. This prevents users
|
|
* from downgrading the pattern/pin/password to a level below the minimums.
|
|
*
|
|
* ASSUMPTION: Setting quality is sufficient (e.g. minimum lengths will be set
|
|
* appropriately.)
|
|
*/
|
|
private int upgradeQualityForEncryption(int quality) {
|
|
int encryptionStatus = mDPM.getStorageEncryptionStatus();
|
|
boolean encrypted = (encryptionStatus == DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE)
|
|
|| (encryptionStatus == DevicePolicyManager.ENCRYPTION_STATUS_ACTIVATING);
|
|
if (encrypted) {
|
|
if (quality < CryptKeeperSettings.MIN_PASSWORD_QUALITY) {
|
|
quality = CryptKeeperSettings.MIN_PASSWORD_QUALITY;
|
|
}
|
|
}
|
|
return quality;
|
|
}
|
|
|
|
private int upgradeQualityForKeyStore(int quality) {
|
|
if (!mKeyStore.isEmpty()) {
|
|
if (quality < CredentialStorage.MIN_PASSWORD_QUALITY) {
|
|
quality = CredentialStorage.MIN_PASSWORD_QUALITY;
|
|
}
|
|
}
|
|
return quality;
|
|
}
|
|
|
|
/***
|
|
* Disables preferences that are less secure than required quality.
|
|
*
|
|
* @param quality the requested quality.
|
|
*/
|
|
private void disableUnusablePreferences(final int quality, MutableBoolean allowBiometric) {
|
|
final PreferenceScreen entries = getPreferenceScreen();
|
|
final boolean onlyShowFallback = getActivity().getIntent()
|
|
.getBooleanExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, false);
|
|
final boolean weakBiometricAvailable =
|
|
mChooseLockSettingsHelper.utils().isBiometricWeakInstalled();
|
|
|
|
// if there are multiple users, disable "None" setting
|
|
UserManager mUm = (UserManager) getSystemService(Context.USER_SERVICE);
|
|
List<UserInfo> users = mUm.getUsers(true);
|
|
final boolean singleUser = users.size() == 1;
|
|
|
|
for (int i = entries.getPreferenceCount() - 1; i >= 0; --i) {
|
|
Preference pref = entries.getPreference(i);
|
|
if (pref instanceof PreferenceScreen) {
|
|
final String key = ((PreferenceScreen) pref).getKey();
|
|
boolean enabled = true;
|
|
boolean visible = true;
|
|
if (KEY_UNLOCK_SET_OFF.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED;
|
|
visible = singleUser; // don't show when there's more than 1 user
|
|
} else if (KEY_UNLOCK_SET_NONE.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED;
|
|
} else if (KEY_UNLOCK_SET_BIOMETRIC_WEAK.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK ||
|
|
allowBiometric.value;
|
|
visible = weakBiometricAvailable; // If not available, then don't show it.
|
|
} else if (KEY_UNLOCK_SET_PATTERN.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_SOMETHING;
|
|
} else if (KEY_UNLOCK_SET_PIN.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_NUMERIC;
|
|
} else if (KEY_UNLOCK_SET_PASSWORD.equals(key)) {
|
|
enabled = quality <= DevicePolicyManager.PASSWORD_QUALITY_COMPLEX;
|
|
}
|
|
if (!visible || (onlyShowFallback && !allowedForFallback(key))) {
|
|
entries.removePreference(pref);
|
|
} else if (!enabled) {
|
|
pref.setSummary(R.string.unlock_set_unlock_disabled_summary);
|
|
pref.setEnabled(false);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check whether the key is allowed for fallback (e.g. bio sensor). Returns true if it's
|
|
* supported as a backup.
|
|
*
|
|
* @param key
|
|
* @return true if allowed
|
|
*/
|
|
private boolean allowedForFallback(String key) {
|
|
return KEY_UNLOCK_BACKUP_INFO.equals(key) ||
|
|
KEY_UNLOCK_SET_PATTERN.equals(key) || KEY_UNLOCK_SET_PIN.equals(key);
|
|
}
|
|
|
|
private Intent getBiometricSensorIntent() {
|
|
Intent fallBackIntent = new Intent().setClass(getActivity(),
|
|
ChooseLockGeneric.InternalActivity.class);
|
|
fallBackIntent.putExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, true);
|
|
fallBackIntent.putExtra(CONFIRM_CREDENTIALS, false);
|
|
fallBackIntent.putExtra(EXTRA_SHOW_FRAGMENT_TITLE,
|
|
R.string.backup_lock_settings_picker_title);
|
|
|
|
boolean showTutorial = ALWAY_SHOW_TUTORIAL ||
|
|
!mChooseLockSettingsHelper.utils().isBiometricWeakEverChosen();
|
|
Intent intent = new Intent();
|
|
intent.setClassName("com.android.facelock", "com.android.facelock.SetupIntro");
|
|
intent.putExtra("showTutorial", showTutorial);
|
|
PendingIntent pending = PendingIntent.getActivity(getActivity(), 0, fallBackIntent, 0);
|
|
intent.putExtra("PendingIntent", pending);
|
|
return intent;
|
|
}
|
|
|
|
/**
|
|
* Invokes an activity to change the user's pattern, password or PIN based on given quality
|
|
* and minimum quality specified by DevicePolicyManager. If quality is
|
|
* {@link DevicePolicyManager#PASSWORD_QUALITY_UNSPECIFIED}, password is cleared.
|
|
*
|
|
* @param quality the desired quality. Ignored if DevicePolicyManager requires more security
|
|
* @param disabled whether or not to show LockScreen at all. Only meaningful when quality is
|
|
* {@link DevicePolicyManager#PASSWORD_QUALITY_UNSPECIFIED}
|
|
*/
|
|
void updateUnlockMethodAndFinish(int quality, boolean disabled) {
|
|
// Sanity check. We should never get here without confirming user's existing password.
|
|
if (!mPasswordConfirmed) {
|
|
throw new IllegalStateException("Tried to update password without confirming it");
|
|
}
|
|
|
|
final boolean isFallback = getActivity().getIntent()
|
|
.getBooleanExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, false);
|
|
|
|
quality = upgradeQuality(quality, null);
|
|
|
|
if (quality >= DevicePolicyManager.PASSWORD_QUALITY_NUMERIC) {
|
|
int minLength = mDPM.getPasswordMinimumLength(null);
|
|
if (minLength < MIN_PASSWORD_LENGTH) {
|
|
minLength = MIN_PASSWORD_LENGTH;
|
|
}
|
|
final int maxLength = mDPM.getPasswordMaximumLength(quality);
|
|
Intent intent = new Intent().setClass(getActivity(), ChooseLockPassword.class);
|
|
intent.putExtra(LockPatternUtils.PASSWORD_TYPE_KEY, quality);
|
|
intent.putExtra(ChooseLockPassword.PASSWORD_MIN_KEY, minLength);
|
|
intent.putExtra(ChooseLockPassword.PASSWORD_MAX_KEY, maxLength);
|
|
intent.putExtra(CONFIRM_CREDENTIALS, false);
|
|
intent.putExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK,
|
|
isFallback);
|
|
if (isFallback) {
|
|
startActivityForResult(intent, FALLBACK_REQUEST);
|
|
return;
|
|
} else {
|
|
mFinishPending = true;
|
|
intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
|
|
startActivity(intent);
|
|
}
|
|
} else if (quality == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING) {
|
|
Intent intent = new Intent(getActivity(), ChooseLockPattern.class);
|
|
intent.putExtra("key_lock_method", "pattern");
|
|
intent.putExtra(CONFIRM_CREDENTIALS, false);
|
|
intent.putExtra(LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK,
|
|
isFallback);
|
|
if (isFallback) {
|
|
startActivityForResult(intent, FALLBACK_REQUEST);
|
|
return;
|
|
} else {
|
|
mFinishPending = true;
|
|
intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
|
|
startActivity(intent);
|
|
}
|
|
} else if (quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) {
|
|
Intent intent = getBiometricSensorIntent();
|
|
mFinishPending = true;
|
|
startActivity(intent);
|
|
} else if (quality == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) {
|
|
mChooseLockSettingsHelper.utils().clearLock(false);
|
|
mChooseLockSettingsHelper.utils().setLockScreenDisabled(disabled);
|
|
getActivity().setResult(Activity.RESULT_OK);
|
|
finish();
|
|
} else {
|
|
finish();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected int getHelpResource() {
|
|
return R.string.help_url_choose_lockscreen;
|
|
}
|
|
|
|
}
|
|
}
|