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/*
* Copyright (C) 2018 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.security;
import android.app.admin.DevicePolicyManager;
import android.content.Context;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.storage.StorageManager;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import android.text.TextUtils;
import com.android.internal.widget.LockPatternUtils;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.core.SubSettingLauncher;
import com.android.settings.overlay.FeatureFactory;
import com.android.settings.password.ChooseLockGeneric;
import com.android.settings.security.screenlock.ScreenLockSettings;
import com.android.settings.widget.GearPreference;
import com.android.settingslib.RestrictedLockUtils;
import com.android.settingslib.RestrictedPreference;
import com.android.settingslib.core.AbstractPreferenceController;
public class ChangeScreenLockPreferenceController extends AbstractPreferenceController implements
PreferenceControllerMixin, GearPreference.OnGearClickListener {
private static final String KEY_UNLOCK_SET_OR_CHANGE = "unlock_set_or_change";
protected final DevicePolicyManager mDPM;
protected final SecuritySettings mHost;
protected final UserManager mUm;
protected final LockPatternUtils mLockPatternUtils;
protected final int mUserId = UserHandle.myUserId();
protected final int mProfileChallengeUserId;
protected RestrictedPreference mPreference;
public ChangeScreenLockPreferenceController(Context context, SecuritySettings host) {
super(context);
mUm = (UserManager) context.getSystemService(Context.USER_SERVICE);
mDPM = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
mLockPatternUtils = FeatureFactory.getFactory(context)
.getSecurityFeatureProvider()
.getLockPatternUtils(context);
mHost = host;
mProfileChallengeUserId = Utils.getManagedProfileId(mUm, mUserId);
}
@Override
public boolean isAvailable() {
return mContext.getResources().getBoolean(R.bool.config_show_unlock_set_or_change);
}
@Override
public String getPreferenceKey() {
return KEY_UNLOCK_SET_OR_CHANGE;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mPreference = (RestrictedPreference) screen.findPreference(getPreferenceKey());
}
@Override
public void updateState(Preference preference) {
if (mPreference != null && mPreference instanceof GearPreference) {
if (mLockPatternUtils.isSecure(mUserId)
|| !mLockPatternUtils.isLockScreenDisabled(mUserId)) {
((GearPreference) mPreference).setOnGearClickListener(this);
} else {
((GearPreference) mPreference).setOnGearClickListener(null);
}
}
updateSummary(preference, mUserId);
disableIfPasswordQualityManaged(mUserId);
if (!mLockPatternUtils.isSeparateProfileChallengeEnabled(mProfileChallengeUserId)) {
// PO may disallow to change password for the profile, but screen lock and managed
// profile's lock is the same. Disable main "Screen lock" menu.
disableIfPasswordQualityManaged(mProfileChallengeUserId);
}
}
@Override
public void onGearClick(GearPreference p) {
if (TextUtils.equals(p.getKey(), getPreferenceKey())) {
new SubSettingLauncher(mContext)
.setDestination(ScreenLockSettings.class.getName())
.setSourceMetricsCategory(mHost.getMetricsCategory())
.launch();
}
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (!TextUtils.equals(preference.getKey(), getPreferenceKey())) {
return super.handlePreferenceTreeClick(preference);
}
// TODO(b/35930129): Remove once existing password can be passed into vold directly.
// Currently we need this logic to ensure that the QUIET_MODE is off for any work
// profile with unified challenge on FBE-enabled devices. Otherwise, vold would not be
// able to complete the operation due to the lack of (old) encryption key.
if (mProfileChallengeUserId != UserHandle.USER_NULL
&& !mLockPatternUtils.isSeparateProfileChallengeEnabled(mProfileChallengeUserId)
&& StorageManager.isFileEncryptedNativeOnly()) {
if (Utils.startQuietModeDialogIfNecessary(mContext, mUm, mProfileChallengeUserId)) {
return false;
}
}
new SubSettingLauncher(mContext)
.setDestination(ChooseLockGeneric.ChooseLockGenericFragment.class.getName())
.setTitle(R.string.lock_settings_picker_title)
.setSourceMetricsCategory(mHost.getMetricsCategory())
.launch();
return true;
}
protected void updateSummary(Preference preference, int userId) {
if (!mLockPatternUtils.isSecure(userId)) {
if (userId == mProfileChallengeUserId
|| mLockPatternUtils.isLockScreenDisabled(userId)) {
preference.setSummary(R.string.unlock_set_unlock_mode_off);
} else {
preference.setSummary(R.string.unlock_set_unlock_mode_none);
}
} else {
switch (mLockPatternUtils.getKeyguardStoredPasswordQuality(userId)) {
case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
preference.setSummary(R.string.unlock_set_unlock_mode_pattern);
break;
case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
preference.setSummary(R.string.unlock_set_unlock_mode_pin);
break;
case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
case DevicePolicyManager.PASSWORD_QUALITY_MANAGED:
preference.setSummary(R.string.unlock_set_unlock_mode_password);
break;
}
}
mPreference.setEnabled(true);
}
/**
* Sets the preference as disabled by admin if PASSWORD_QUALITY_MANAGED is set.
* The preference must be a RestrictedPreference.
* <p/>
* DO or PO installed in the user may disallow to change password.
*/
void disableIfPasswordQualityManaged(int userId) {
final RestrictedLockUtils.EnforcedAdmin admin = RestrictedLockUtils
.checkIfPasswordQualityIsSet(mContext, userId);
final DevicePolicyManager dpm = (DevicePolicyManager) mContext
.getSystemService(Context.DEVICE_POLICY_SERVICE);
if (admin != null && dpm.getPasswordQuality(admin.component, userId)
== DevicePolicyManager.PASSWORD_QUALITY_MANAGED) {
mPreference.setDisabledByAdmin(admin);
}
}
}
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