1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settings.wifi.tether; 18 19 import static com.android.settings.AllInOneTetherSettings.DEDUP_POSTFIX; 20 21 import android.app.settings.SettingsEnums; 22 import android.content.Context; 23 import android.net.wifi.SoftApConfiguration; 24 import android.text.TextUtils; 25 import android.util.FeatureFlagUtils; 26 27 import androidx.annotation.VisibleForTesting; 28 import androidx.preference.EditTextPreference; 29 import androidx.preference.Preference; 30 31 import com.android.settings.R; 32 import com.android.settings.core.FeatureFlags; 33 import com.android.settings.overlay.FeatureFactory; 34 import com.android.settings.widget.ValidatedEditTextPreference; 35 import com.android.settings.wifi.WifiUtils; 36 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider; 37 38 import java.util.UUID; 39 40 public class WifiTetherPasswordPreferenceController extends WifiTetherBasePreferenceController 41 implements ValidatedEditTextPreference.Validator { 42 43 private static final String PREF_KEY = "wifi_tether_network_password"; 44 45 private String mPassword; 46 47 private final MetricsFeatureProvider mMetricsFeatureProvider; 48 49 @VisibleForTesting WifiTetherPasswordPreferenceController(Context context, OnTetherConfigUpdateListener listener, MetricsFeatureProvider provider)50 WifiTetherPasswordPreferenceController(Context context, OnTetherConfigUpdateListener listener, 51 MetricsFeatureProvider provider) { 52 super(context, listener); 53 mMetricsFeatureProvider = provider; 54 } 55 WifiTetherPasswordPreferenceController(Context context, OnTetherConfigUpdateListener listener)56 public WifiTetherPasswordPreferenceController(Context context, 57 OnTetherConfigUpdateListener listener) { 58 super(context, listener); 59 mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider(); 60 } 61 62 @Override getPreferenceKey()63 public String getPreferenceKey() { 64 return FeatureFlagUtils.isEnabled(mContext, FeatureFlags.TETHER_ALL_IN_ONE) 65 ? PREF_KEY + DEDUP_POSTFIX : PREF_KEY; 66 } 67 68 @Override updateDisplay()69 public void updateDisplay() { 70 final SoftApConfiguration config = mWifiManager.getSoftApConfiguration(); 71 if (config == null 72 || (config.getSecurityType() == SoftApConfiguration.SECURITY_TYPE_WPA2_PSK 73 && TextUtils.isEmpty(config.getPassphrase()))) { 74 mPassword = generateRandomPassword(); 75 } else { 76 mPassword = config.getPassphrase(); 77 } 78 ((ValidatedEditTextPreference) mPreference).setValidator(this); 79 ((ValidatedEditTextPreference) mPreference).setIsPassword(true); 80 ((ValidatedEditTextPreference) mPreference).setIsSummaryPassword(true); 81 updatePasswordDisplay((EditTextPreference) mPreference); 82 } 83 84 @Override onPreferenceChange(Preference preference, Object newValue)85 public boolean onPreferenceChange(Preference preference, Object newValue) { 86 if (!TextUtils.equals(mPassword, (String) newValue)) { 87 mMetricsFeatureProvider.action(mContext, 88 SettingsEnums.ACTION_SETTINGS_CHANGE_WIFI_HOTSPOT_PASSWORD); 89 } 90 mPassword = (String) newValue; 91 updatePasswordDisplay((EditTextPreference) mPreference); 92 mListener.onTetherConfigUpdated(this); 93 return true; 94 } 95 96 /** 97 * This method returns the current password if it is valid for the indicated security type. If 98 * the password currently set is invalid it will forcefully set a random password that is valid. 99 * 100 * @param securityType The security type for the password. 101 * @return The current password if it is valid for the indicated security type. A new randomly 102 * generated password if it is not. 103 */ getPasswordValidated(int securityType)104 public String getPasswordValidated(int securityType) { 105 // don't actually overwrite unless we get a new config in case it was accidentally toggled. 106 if (securityType == SoftApConfiguration.SECURITY_TYPE_OPEN) { 107 return ""; 108 } else if (!isTextValid(mPassword)) { 109 mPassword = generateRandomPassword(); 110 updatePasswordDisplay((EditTextPreference) mPreference); 111 } 112 return mPassword; 113 } 114 updateVisibility(int securityType)115 public void updateVisibility(int securityType) { 116 mPreference.setVisible(securityType != SoftApConfiguration.SECURITY_TYPE_OPEN); 117 } 118 119 @Override isTextValid(String value)120 public boolean isTextValid(String value) { 121 return WifiUtils.isHotspotWpa2PasswordValid(value); 122 } 123 generateRandomPassword()124 private static String generateRandomPassword() { 125 String randomUUID = UUID.randomUUID().toString(); 126 //first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx 127 return randomUUID.substring(0, 8) + randomUUID.substring(9, 13); 128 } 129 updatePasswordDisplay(EditTextPreference preference)130 private void updatePasswordDisplay(EditTextPreference preference) { 131 ValidatedEditTextPreference pref = (ValidatedEditTextPreference) preference; 132 pref.setText(mPassword); 133 if (!TextUtils.isEmpty(mPassword)) { 134 pref.setIsSummaryPassword(true); 135 pref.setSummary(mPassword); 136 pref.setVisible(true); 137 } else { 138 pref.setIsSummaryPassword(false); 139 pref.setSummary(R.string.wifi_hotspot_no_password_subtext); 140 pref.setVisible(false); 141 } 142 } 143 } 144