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/*
* 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.keyguard;
import android.app.admin.DevicePolicyManager;
import android.content.Context;
import android.telephony.SubscriptionInfo;
import android.telephony.SubscriptionManager;
import android.telephony.TelephonyManager;
import com.android.internal.telephony.IccCardConstants;
import com.android.internal.widget.LockPatternUtils;
import java.util.List;
public class KeyguardSecurityModel {
/**
* The different types of security available for {@link Mode#UnlockScreen}.
* @see com.android.internal.policy.impl.LockPatternKeyguardView#getUnlockMode()
*/
public enum SecurityMode {
Invalid, // NULL state
None, // No security enabled
Pattern, // Unlock by drawing a pattern.
Password, // Unlock by entering an alphanumeric password
PIN, // Strictly numeric password
SimPin, // Unlock by entering a sim pin.
SimPuk // Unlock by entering a sim puk
}
private Context mContext;
private LockPatternUtils mLockPatternUtils;
KeyguardSecurityModel(Context context) {
mContext = context;
mLockPatternUtils = new LockPatternUtils(context);
}
void setLockPatternUtils(LockPatternUtils utils) {
mLockPatternUtils = utils;
}
SecurityMode getSecurityMode() {
KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
SecurityMode mode = SecurityMode.None;
if (SubscriptionManager.isValidSubscriptionId(
monitor.getNextSubIdForState(IccCardConstants.State.PIN_REQUIRED))) {
mode = SecurityMode.SimPin;
} else if (SubscriptionManager.isValidSubscriptionId(
monitor.getNextSubIdForState(IccCardConstants.State.PUK_REQUIRED))
&& mLockPatternUtils.isPukUnlockScreenEnable()) {
mode = SecurityMode.SimPuk;
} else {
final int security = mLockPatternUtils.getKeyguardStoredPasswordQuality();
switch (security) {
case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
mode = mLockPatternUtils.isLockPasswordEnabled() ?
SecurityMode.PIN : SecurityMode.None;
break;
case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
mode = mLockPatternUtils.isLockPasswordEnabled() ?
SecurityMode.Password : SecurityMode.None;
break;
case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
case DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED:
mode = mLockPatternUtils.isLockPatternEnabled() ?
SecurityMode.Pattern : SecurityMode.None;
break;
default:
throw new IllegalStateException("Unknown security quality:" + security);
}
}
return mode;
}
/**
* Some unlock methods can have an alternate, such as biometric unlocks (e.g. face unlock).
* This function decides if an alternate unlock is available and returns it. Otherwise,
* returns @param mode.
*
* @param mode the mode we want the alternate for
* @return alternate or the given mode
*/
SecurityMode getAlternateFor(SecurityMode mode) {
return mode; // no alternate, return what was given
}
/**
* Some unlock methods can have a backup which gives the user another way to get into
* the device. This is currently only supported for Biometric and Pattern unlock.
*
* @return backup method or current security mode
*/
SecurityMode getBackupSecurityMode(SecurityMode mode) {
return mode; // no backup, return current security mode
}
}
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