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/*
* Copyright (C) 2017 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.development;
import static com.android.settings.development.DevelopmentOptionsActivityRequestCodes
.REQUEST_CODE_ENABLE_OEM_UNLOCK;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.os.UserHandle;
import android.os.UserManager;
import android.service.oemlock.OemLockManager;
import android.telephony.TelephonyManager;
import androidx.annotation.VisibleForTesting;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.password.ChooseLockSettingsHelper;
import com.android.settingslib.RestrictedSwitchPreference;
import com.android.settingslib.development.DeveloperOptionsPreferenceController;
public class OemUnlockPreferenceController extends DeveloperOptionsPreferenceController implements
Preference.OnPreferenceChangeListener, PreferenceControllerMixin, OnActivityResultListener {
private static final String PREFERENCE_KEY = "oem_unlock_enable";
private final OemLockManager mOemLockManager;
private final UserManager mUserManager;
private final TelephonyManager mTelephonyManager;
private final DevelopmentSettingsDashboardFragment mFragment;
private final ChooseLockSettingsHelper mChooseLockSettingsHelper;
private RestrictedSwitchPreference mPreference;
public OemUnlockPreferenceController(Context context, Activity activity,
DevelopmentSettingsDashboardFragment fragment) {
super(context);
mOemLockManager = (OemLockManager) context.getSystemService(Context.OEM_LOCK_SERVICE);
mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
mTelephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
mFragment = fragment;
if (activity != null || mFragment != null) {
mChooseLockSettingsHelper = new ChooseLockSettingsHelper(activity, mFragment);
} else {
mChooseLockSettingsHelper = null;
}
}
@Override
public boolean isAvailable() {
return mOemLockManager != null;
}
@Override
public String getPreferenceKey() {
return PREFERENCE_KEY;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mPreference = (RestrictedSwitchPreference) screen.findPreference(getPreferenceKey());
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
boolean isUnlocked = (Boolean) newValue;
if (isUnlocked) {
if (!showKeyguardConfirmation(mContext.getResources(),
REQUEST_CODE_ENABLE_OEM_UNLOCK)) {
confirmEnableOemUnlock();
}
} else {
mOemLockManager.setOemUnlockAllowedByUser(false);
OemLockInfoDialog.show(mFragment);
}
return true;
}
@Override
public void updateState(Preference preference) {
super.updateState(preference);
mPreference.setChecked(isOemUnlockedAllowed());
updateOemUnlockSettingDescription();
// Showing mEnableOemUnlock preference as device has persistent data block.
mPreference.setDisabledByAdmin(null);
mPreference.setEnabled(enableOemUnlockPreference());
if (mPreference.isEnabled()) {
// Check restriction, disable mEnableOemUnlock and apply policy transparency.
mPreference.checkRestrictionAndSetDisabled(UserManager.DISALLOW_FACTORY_RESET);
}
}
@Override
public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_ENABLE_OEM_UNLOCK) {
if (resultCode == Activity.RESULT_OK) {
if (mPreference.isChecked()) {
confirmEnableOemUnlock();
} else {
mOemLockManager.setOemUnlockAllowedByUser(false);
}
}
return true;
}
return false;
}
@Override
protected void onDeveloperOptionsSwitchEnabled() {
handleDeveloperOptionsToggled();
}
public void onOemUnlockConfirmed() {
mOemLockManager.setOemUnlockAllowedByUser(true);
}
public void onOemUnlockDismissed() {
if (mPreference == null) {
return;
}
updateState(mPreference);
}
private void handleDeveloperOptionsToggled() {
mPreference.setEnabled(enableOemUnlockPreference());
if (mPreference.isEnabled()) {
// Check restriction, disable mEnableOemUnlock and apply policy transparency.
mPreference.checkRestrictionAndSetDisabled(UserManager.DISALLOW_FACTORY_RESET);
}
}
private void updateOemUnlockSettingDescription() {
int oemUnlockSummary = R.string.oem_unlock_enable_summary;
if (isBootloaderUnlocked()) {
oemUnlockSummary = R.string.oem_unlock_enable_disabled_summary_bootloader_unlocked;
} else if (isSimLockedDevice()) {
oemUnlockSummary = R.string.oem_unlock_enable_disabled_summary_sim_locked_device;
} else if (!isOemUnlockAllowedByUserAndCarrier()) {
// If the device isn't SIM-locked but OEM unlock is disallowed by some party, this
// means either some other carrier restriction is in place or the device hasn't been
// able to confirm which restrictions (SIM-lock or otherwise) apply.
oemUnlockSummary =
R.string.oem_unlock_enable_disabled_summary_connectivity_or_locked;
}
mPreference.setSummary(mContext.getResources().getString(oemUnlockSummary));
}
/** Returns {@code true} if the device is SIM-locked. Otherwise, returns {@code false}. */
private boolean isSimLockedDevice() {
int phoneCount = mTelephonyManager.getPhoneCount();
for (int i = 0; i < phoneCount; i++) {
if (mTelephonyManager.getAllowedCarriers(i).size() > 0) {
return true;
}
}
return false;
}
/**
* Returns {@code true} if the bootloader has been unlocked. Otherwise, returns {code false}.
*/
@VisibleForTesting
boolean isBootloaderUnlocked() {
return mOemLockManager.isDeviceOemUnlocked();
}
private boolean enableOemUnlockPreference() {
return !isBootloaderUnlocked() && isOemUnlockAllowedByUserAndCarrier();
}
@VisibleForTesting
boolean showKeyguardConfirmation(Resources resources, int requestCode) {
return mChooseLockSettingsHelper.launchConfirmationActivity(
requestCode, resources.getString(R.string.oem_unlock_enable));
}
@VisibleForTesting
void confirmEnableOemUnlock() {
EnableOemUnlockSettingWarningDialog.show(mFragment);
}
/**
* Returns whether OEM unlock is allowed by the user and carrier.
*
* This does not take into account any restrictions imposed by the device policy.
*/
@VisibleForTesting
boolean isOemUnlockAllowedByUserAndCarrier() {
final UserHandle userHandle = UserHandle.of(UserHandle.myUserId());
return mOemLockManager.isOemUnlockAllowedByCarrier()
&& !mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_FACTORY_RESET,
userHandle);
}
@VisibleForTesting
boolean isOemUnlockedAllowed() {
return mOemLockManager.isOemUnlockAllowed();
}
}