112 lines
4.1 KiB
Java
112 lines
4.1 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.wifi;
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import android.app.admin.DevicePolicyManager;
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import android.content.ComponentName;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.pm.PackageManager;
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import android.net.NetworkCapabilities;
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import android.net.wifi.WifiConfiguration;
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import android.provider.Settings;
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import android.text.TextUtils;
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import com.android.settingslib.wrapper.PackageManagerWrapper;
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public class WifiUtils {
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private static final int SSID_ASCII_MIN_LENGTH = 1;
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private static final int SSID_ASCII_MAX_LENGTH = 32;
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private static final int PASSWORD_MIN_LENGTH = 8;
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private static final int PASSWORD_MAX_LENGTH = 63;
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public static boolean isSSIDTooLong(String ssid) {
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if (TextUtils.isEmpty(ssid)) {
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return false;
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}
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return ssid.length() > SSID_ASCII_MAX_LENGTH;
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}
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public static boolean isSSIDTooShort(String ssid) {
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if (TextUtils.isEmpty(ssid)) {
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return true;
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}
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return ssid.length() < SSID_ASCII_MIN_LENGTH;
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}
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public static boolean isPasswordValid(String password) {
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if (TextUtils.isEmpty(password)) {
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return false;
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}
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final int length = password.length();
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return length >= PASSWORD_MIN_LENGTH && length <= PASSWORD_MAX_LENGTH;
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}
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/**
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* This method is a stripped and negated version of WifiConfigStore.canModifyNetwork.
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* @param context Context of caller
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* @param config The WiFi config.
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* @return true if Settings cannot modify the config due to lockDown.
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*/
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public static boolean isNetworkLockedDown(Context context, WifiConfiguration config) {
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if (config == null) {
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return false;
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}
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final DevicePolicyManager dpm =
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(DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);
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final PackageManagerWrapper pm = new PackageManagerWrapper(context.getPackageManager());
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// Check if device has DPM capability. If it has and dpm is still null, then we
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// treat this case with suspicion and bail out.
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if (pm.hasSystemFeature(PackageManager.FEATURE_DEVICE_ADMIN) && dpm == null) {
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return true;
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}
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boolean isConfigEligibleForLockdown = false;
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if (dpm != null) {
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final ComponentName deviceOwner = dpm.getDeviceOwnerComponentOnAnyUser();
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if (deviceOwner != null) {
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final int deviceOwnerUserId = dpm.getDeviceOwnerUserId();
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try {
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final int deviceOwnerUid = pm.getPackageUidAsUser(deviceOwner.getPackageName(),
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deviceOwnerUserId);
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isConfigEligibleForLockdown = deviceOwnerUid == config.creatorUid;
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} catch (PackageManager.NameNotFoundException e) {
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// don't care
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}
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}
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}
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if (!isConfigEligibleForLockdown) {
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return false;
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}
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final ContentResolver resolver = context.getContentResolver();
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final boolean isLockdownFeatureEnabled = Settings.Global.getInt(resolver,
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Settings.Global.WIFI_DEVICE_OWNER_CONFIGS_LOCKDOWN, 0) != 0;
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return isLockdownFeatureEnabled;
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}
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/** Returns true if the provided NetworkCapabilities indicate a captive portal network. */
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public static boolean canSignIntoNetwork(NetworkCapabilities capabilities) {
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return (capabilities != null
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&& capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL));
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}
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}
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