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 android.content.Context; 20 import android.net.wifi.WifiConfiguration; 21 import android.support.v7.preference.EditTextPreference; 22 import android.support.v7.preference.Preference; 23 import android.text.TextUtils; 24 25 import com.android.settings.R; 26 import com.android.settings.widget.ValidatedEditTextPreference; 27 import com.android.settings.wifi.WifiUtils; 28 29 import java.util.UUID; 30 31 public class WifiTetherPasswordPreferenceController extends WifiTetherBasePreferenceController 32 implements ValidatedEditTextPreference.Validator { 33 34 private static final String PREF_KEY = "wifi_tether_network_password"; 35 36 private String mPassword; 37 WifiTetherPasswordPreferenceController(Context context, OnTetherConfigUpdateListener listener)38 public WifiTetherPasswordPreferenceController(Context context, 39 OnTetherConfigUpdateListener listener) { 40 super(context, listener); 41 } 42 43 @Override getPreferenceKey()44 public String getPreferenceKey() { 45 return PREF_KEY; 46 } 47 48 @Override updateDisplay()49 public void updateDisplay() { 50 final WifiConfiguration config = mWifiManager.getWifiApConfiguration(); 51 if (config == null || (config.getAuthType() == WifiConfiguration.KeyMgmt.WPA2_PSK 52 && TextUtils.isEmpty(config.preSharedKey))) { 53 mPassword = generateRandomPassword(); 54 } else { 55 mPassword = config.preSharedKey; 56 } 57 ((ValidatedEditTextPreference) mPreference).setValidator(this); 58 ((ValidatedEditTextPreference) mPreference).setIsPassword(true); 59 ((ValidatedEditTextPreference) mPreference).setIsSummaryPassword(true); 60 updatePasswordDisplay((EditTextPreference) mPreference); 61 } 62 63 @Override onPreferenceChange(Preference preference, Object newValue)64 public boolean onPreferenceChange(Preference preference, Object newValue) { 65 mPassword = (String) newValue; 66 updatePasswordDisplay((EditTextPreference) mPreference); 67 mListener.onTetherConfigUpdated(); 68 return true; 69 } 70 71 /** 72 * This method returns the current password if it is valid for the indicated security type. If 73 * the password currently set is invalid it will forcefully set a random password that is valid. 74 * 75 * @param securityType The security type for the password. 76 * @return The current password if it is valid for the indicated security type. A new randomly 77 * generated password if it is not. 78 */ getPasswordValidated(int securityType)79 public String getPasswordValidated(int securityType) { 80 // don't actually overwrite unless we get a new config in case it was accidentally toggled. 81 if (securityType == WifiConfiguration.KeyMgmt.NONE) { 82 return ""; 83 } else if (!isTextValid(mPassword)) { 84 mPassword = generateRandomPassword(); 85 updatePasswordDisplay((EditTextPreference) mPreference); 86 } 87 return mPassword; 88 } 89 updateVisibility(int securityType)90 public void updateVisibility(int securityType) { 91 mPreference.setVisible(securityType != WifiConfiguration.KeyMgmt.NONE); 92 } 93 94 @Override isTextValid(String value)95 public boolean isTextValid(String value) { 96 return WifiUtils.isHotspotPasswordValid(value); 97 } 98 generateRandomPassword()99 private static String generateRandomPassword() { 100 String randomUUID = UUID.randomUUID().toString(); 101 //first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx 102 return randomUUID.substring(0, 8) + randomUUID.substring(9, 13); 103 } 104 updatePasswordDisplay(EditTextPreference preference)105 private void updatePasswordDisplay(EditTextPreference preference) { 106 ValidatedEditTextPreference pref = (ValidatedEditTextPreference) preference; 107 pref.setText(mPassword); 108 if (!TextUtils.isEmpty(mPassword)) { 109 pref.setIsSummaryPassword(true); 110 pref.setSummary(mPassword); 111 pref.setVisible(true); 112 } else { 113 pref.setIsSummaryPassword(false); 114 pref.setSummary(R.string.wifi_hotspot_no_password_subtext); 115 pref.setVisible(false); 116 } 117 } 118 } 119