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      1 /*
      2  * Copyright (C) 2010 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;
     18 
     19 import com.android.settings.R;
     20 
     21 import android.app.AlertDialog;
     22 import android.content.Context;
     23 import android.content.DialogInterface;
     24 import android.content.res.Resources;
     25 import android.net.NetworkInfo.DetailedState;
     26 import android.net.wifi.WifiConfiguration;
     27 import android.net.wifi.WifiConfiguration.AuthAlgorithm;
     28 import android.net.wifi.WifiConfiguration.KeyMgmt;
     29 import android.net.wifi.WifiInfo;
     30 import android.os.Bundle;
     31 import android.security.Credentials;
     32 import android.security.KeyStore;
     33 import android.text.Editable;
     34 import android.text.InputType;
     35 import android.text.TextWatcher;
     36 import android.text.format.Formatter;
     37 import android.view.View;
     38 import android.view.ViewGroup;
     39 import android.widget.AdapterView;
     40 import android.widget.ArrayAdapter;
     41 import android.widget.CheckBox;
     42 import android.widget.Spinner;
     43 import android.widget.TextView;
     44 
     45 class WifiDialog extends AlertDialog implements View.OnClickListener,
     46         TextWatcher, AdapterView.OnItemSelectedListener {
     47     private static final String KEYSTORE_SPACE = "keystore://";
     48 
     49     static final int BUTTON_SUBMIT = DialogInterface.BUTTON_POSITIVE;
     50     static final int BUTTON_FORGET = DialogInterface.BUTTON_NEUTRAL;
     51 
     52     final boolean edit;
     53     private final DialogInterface.OnClickListener mListener;
     54     private final AccessPoint mAccessPoint;
     55 
     56     private View mView;
     57     private TextView mSsid;
     58     private int mSecurity;
     59     private TextView mPassword;
     60 
     61     private Spinner mEapMethod;
     62     private Spinner mEapCaCert;
     63     private Spinner mPhase2;
     64     private Spinner mEapUserCert;
     65     private TextView mEapIdentity;
     66     private TextView mEapAnonymous;
     67 
     68     static boolean requireKeyStore(WifiConfiguration config) {
     69         String values[] = {config.ca_cert.value(), config.client_cert.value(),
     70                 config.private_key.value()};
     71         for (String value : values) {
     72             if (value != null && value.startsWith(KEYSTORE_SPACE)) {
     73                 return true;
     74             }
     75         }
     76         return false;
     77     }
     78 
     79     WifiDialog(Context context, DialogInterface.OnClickListener listener,
     80             AccessPoint accessPoint, boolean edit) {
     81         super(context);
     82         this.edit = edit;
     83         mListener = listener;
     84         mAccessPoint = accessPoint;
     85         mSecurity = (accessPoint == null) ? AccessPoint.SECURITY_NONE : accessPoint.security;
     86     }
     87 
     88     WifiConfiguration getConfig() {
     89         if (mAccessPoint != null && mAccessPoint.networkId != -1 && !edit) {
     90             return null;
     91         }
     92 
     93         WifiConfiguration config = new WifiConfiguration();
     94 
     95         if (mAccessPoint == null) {
     96             config.SSID = AccessPoint.convertToQuotedString(
     97                     mSsid.getText().toString());
     98             // If the user adds a network manually, assume that it is hidden.
     99             config.hiddenSSID = true;
    100         } else if (mAccessPoint.networkId == -1) {
    101             config.SSID = AccessPoint.convertToQuotedString(
    102                     mAccessPoint.ssid);
    103         } else {
    104             config.networkId = mAccessPoint.networkId;
    105         }
    106 
    107         switch (mSecurity) {
    108             case AccessPoint.SECURITY_NONE:
    109                 config.allowedKeyManagement.set(KeyMgmt.NONE);
    110                 return config;
    111 
    112             case AccessPoint.SECURITY_WEP:
    113                 config.allowedKeyManagement.set(KeyMgmt.NONE);
    114                 config.allowedAuthAlgorithms.set(AuthAlgorithm.OPEN);
    115                 config.allowedAuthAlgorithms.set(AuthAlgorithm.SHARED);
    116                 if (mPassword.length() != 0) {
    117                     int length = mPassword.length();
    118                     String password = mPassword.getText().toString();
    119                     // WEP-40, WEP-104, and 256-bit WEP (WEP-232?)
    120                     if ((length == 10 || length == 26 || length == 58) &&
    121                             password.matches("[0-9A-Fa-f]*")) {
    122                         config.wepKeys[0] = password;
    123                     } else {
    124                         config.wepKeys[0] = '"' + password + '"';
    125                     }
    126                 }
    127                 return config;
    128 
    129             case AccessPoint.SECURITY_PSK:
    130                 config.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
    131                 if (mPassword.length() != 0) {
    132                     String password = mPassword.getText().toString();
    133                     if (password.matches("[0-9A-Fa-f]{64}")) {
    134                         config.preSharedKey = password;
    135                     } else {
    136                         config.preSharedKey = '"' + password + '"';
    137                     }
    138                 }
    139                 return config;
    140 
    141             case AccessPoint.SECURITY_EAP:
    142                 config.allowedKeyManagement.set(KeyMgmt.WPA_EAP);
    143                 config.allowedKeyManagement.set(KeyMgmt.IEEE8021X);
    144                 config.eap.setValue((String) mEapMethod.getSelectedItem());
    145 
    146                 config.phase2.setValue((mPhase2.getSelectedItemPosition() == 0) ? "" :
    147                         "auth=" + mPhase2.getSelectedItem());
    148                 config.ca_cert.setValue((mEapCaCert.getSelectedItemPosition() == 0) ? "" :
    149                         KEYSTORE_SPACE + Credentials.CA_CERTIFICATE +
    150                         (String) mEapCaCert.getSelectedItem());
    151                 config.client_cert.setValue((mEapUserCert.getSelectedItemPosition() == 0) ? "" :
    152                         KEYSTORE_SPACE + Credentials.USER_CERTIFICATE +
    153                         (String) mEapUserCert.getSelectedItem());
    154                 config.private_key.setValue((mEapUserCert.getSelectedItemPosition() == 0) ? "" :
    155                         KEYSTORE_SPACE + Credentials.USER_PRIVATE_KEY +
    156                         (String) mEapUserCert.getSelectedItem());
    157                 config.identity.setValue((mEapIdentity.length() == 0) ? "" :
    158                         mEapIdentity.getText().toString());
    159                 config.anonymous_identity.setValue((mEapAnonymous.length() == 0) ? "" :
    160                         mEapAnonymous.getText().toString());
    161                 if (mPassword.length() != 0) {
    162                     config.password.setValue(mPassword.getText().toString());
    163                 }
    164                 return config;
    165         }
    166         return null;
    167     }
    168 
    169     @Override
    170     protected void onCreate(Bundle savedInstanceState) {
    171         mView = getLayoutInflater().inflate(R.layout.wifi_dialog, null);
    172         setView(mView);
    173         setInverseBackgroundForced(true);
    174 
    175         Context context = getContext();
    176         Resources resources = context.getResources();
    177 
    178         if (mAccessPoint == null) {
    179             setTitle(R.string.wifi_add_network);
    180             mView.findViewById(R.id.type).setVisibility(View.VISIBLE);
    181             mSsid = (TextView) mView.findViewById(R.id.ssid);
    182             mSsid.addTextChangedListener(this);
    183             ((Spinner) mView.findViewById(R.id.security)).setOnItemSelectedListener(this);
    184             setButton(BUTTON_SUBMIT, context.getString(R.string.wifi_save), mListener);
    185         } else {
    186             setTitle(mAccessPoint.ssid);
    187             ViewGroup group = (ViewGroup) mView.findViewById(R.id.info);
    188 
    189             DetailedState state = mAccessPoint.getState();
    190             if (state != null) {
    191                 addRow(group, R.string.wifi_status, Summary.get(getContext(), state));
    192             }
    193 
    194             String[] type = resources.getStringArray(R.array.wifi_security);
    195             addRow(group, R.string.wifi_security, type[mAccessPoint.security]);
    196 
    197             int level = mAccessPoint.getLevel();
    198             if (level != -1) {
    199                 String[] signal = resources.getStringArray(R.array.wifi_signal);
    200                 addRow(group, R.string.wifi_signal, signal[level]);
    201             }
    202 
    203             WifiInfo info = mAccessPoint.getInfo();
    204             if (info != null) {
    205                 addRow(group, R.string.wifi_speed, info.getLinkSpeed() + WifiInfo.LINK_SPEED_UNITS);
    206                 // TODO: fix the ip address for IPv6.
    207                 int address = info.getIpAddress();
    208                 if (address != 0) {
    209                     addRow(group, R.string.wifi_ip_address, Formatter.formatIpAddress(address));
    210                 }
    211             }
    212 
    213             if (mAccessPoint.networkId == -1 || edit) {
    214                 showSecurityFields();
    215             }
    216 
    217             if (edit) {
    218                 setButton(BUTTON_SUBMIT, context.getString(R.string.wifi_save), mListener);
    219             } else {
    220                 if (state == null && level != -1) {
    221                     setButton(BUTTON_SUBMIT, context.getString(R.string.wifi_connect), mListener);
    222                 }
    223                 if (mAccessPoint.networkId != -1) {
    224                     setButton(BUTTON_FORGET, context.getString(R.string.wifi_forget), mListener);
    225                 }
    226             }
    227         }
    228 
    229         setButton(DialogInterface.BUTTON_NEGATIVE,
    230                 context.getString(R.string.wifi_cancel), mListener);
    231 
    232         super.onCreate(savedInstanceState);
    233 
    234         if (getButton(BUTTON_SUBMIT) != null) {
    235             validate();
    236         }
    237     }
    238 
    239     private void addRow(ViewGroup group, int name, String value) {
    240         View row = getLayoutInflater().inflate(R.layout.wifi_dialog_row, group, false);
    241         ((TextView) row.findViewById(R.id.name)).setText(name);
    242         ((TextView) row.findViewById(R.id.value)).setText(value);
    243         group.addView(row);
    244     }
    245 
    246     private void validate() {
    247         // TODO: make sure this is complete.
    248         if ((mSsid != null && mSsid.length() == 0) ||
    249                 ((mAccessPoint == null || mAccessPoint.networkId == -1) &&
    250                 ((mSecurity == AccessPoint.SECURITY_WEP && mPassword.length() == 0) ||
    251                 (mSecurity == AccessPoint.SECURITY_PSK && mPassword.length() < 8)))) {
    252             getButton(BUTTON_SUBMIT).setEnabled(false);
    253         } else {
    254             getButton(BUTTON_SUBMIT).setEnabled(true);
    255         }
    256     }
    257 
    258     public void onClick(View view) {
    259         mPassword.setInputType(
    260                 InputType.TYPE_CLASS_TEXT | (((CheckBox) view).isChecked() ?
    261                 InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD :
    262                 InputType.TYPE_TEXT_VARIATION_PASSWORD));
    263     }
    264 
    265     public void onTextChanged(CharSequence s, int start, int before, int count) {
    266     }
    267 
    268     public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    269     }
    270 
    271     public void afterTextChanged(Editable editable) {
    272         validate();
    273     }
    274 
    275     public void onItemSelected(AdapterView parent, View view, int position, long id) {
    276         mSecurity = position;
    277         showSecurityFields();
    278         validate();
    279     }
    280 
    281     public void onNothingSelected(AdapterView parent) {
    282     }
    283 
    284     private void showSecurityFields() {
    285         if (mSecurity == AccessPoint.SECURITY_NONE) {
    286             mView.findViewById(R.id.fields).setVisibility(View.GONE);
    287             return;
    288         }
    289         mView.findViewById(R.id.fields).setVisibility(View.VISIBLE);
    290 
    291         if (mPassword == null) {
    292             mPassword = (TextView) mView.findViewById(R.id.password);
    293             mPassword.addTextChangedListener(this);
    294             ((CheckBox) mView.findViewById(R.id.show_password)).setOnClickListener(this);
    295 
    296             if (mAccessPoint != null && mAccessPoint.networkId != -1) {
    297                 mPassword.setHint(R.string.wifi_unchanged);
    298             }
    299         }
    300 
    301         if (mSecurity != AccessPoint.SECURITY_EAP) {
    302             mView.findViewById(R.id.eap).setVisibility(View.GONE);
    303             return;
    304         }
    305         mView.findViewById(R.id.eap).setVisibility(View.VISIBLE);
    306 
    307         if (mEapMethod == null) {
    308             mEapMethod = (Spinner) mView.findViewById(R.id.method);
    309             mPhase2 = (Spinner) mView.findViewById(R.id.phase2);
    310             mEapCaCert = (Spinner) mView.findViewById(R.id.ca_cert);
    311             mEapUserCert = (Spinner) mView.findViewById(R.id.user_cert);
    312             mEapIdentity = (TextView) mView.findViewById(R.id.identity);
    313             mEapAnonymous = (TextView) mView.findViewById(R.id.anonymous);
    314 
    315             loadCertificates(mEapCaCert, Credentials.CA_CERTIFICATE);
    316             loadCertificates(mEapUserCert, Credentials.USER_PRIVATE_KEY);
    317 
    318             if (mAccessPoint != null && mAccessPoint.networkId != -1) {
    319                 WifiConfiguration config = mAccessPoint.getConfig();
    320                 setSelection(mEapMethod, config.eap.value());
    321                 setSelection(mPhase2, config.phase2.value());
    322                 setCertificate(mEapCaCert, Credentials.CA_CERTIFICATE,
    323                         config.ca_cert.value());
    324                 setCertificate(mEapUserCert, Credentials.USER_PRIVATE_KEY,
    325                         config.private_key.value());
    326                 mEapIdentity.setText(config.identity.value());
    327                 mEapAnonymous.setText(config.anonymous_identity.value());
    328             }
    329         }
    330     }
    331 
    332     private void loadCertificates(Spinner spinner, String prefix) {
    333         String[] certs = KeyStore.getInstance().saw(prefix);
    334         Context context = getContext();
    335         String unspecified = context.getString(R.string.wifi_unspecified);
    336 
    337         if (certs == null || certs.length == 0) {
    338             certs = new String[] {unspecified};
    339         } else {
    340             String[] array = new String[certs.length + 1];
    341             array[0] = unspecified;
    342             System.arraycopy(certs, 0, array, 1, certs.length);
    343             certs = array;
    344         }
    345 
    346         ArrayAdapter<String> adapter = new ArrayAdapter<String>(
    347                 context, android.R.layout.simple_spinner_item, certs);
    348         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    349         spinner.setAdapter(adapter);
    350     }
    351 
    352     private void setCertificate(Spinner spinner, String prefix, String cert) {
    353         prefix = KEYSTORE_SPACE + prefix;
    354         if (cert != null && cert.startsWith(prefix)) {
    355             setSelection(spinner, cert.substring(prefix.length()));
    356         }
    357     }
    358 
    359     private void setSelection(Spinner spinner, String value) {
    360         if (value != null) {
    361             ArrayAdapter<String> adapter = (ArrayAdapter<String>) spinner.getAdapter();
    362             for (int i = adapter.getCount() - 1; i >= 0; --i) {
    363                 if (value.equals(adapter.getItem(i))) {
    364                     spinner.setSelection(i);
    365                     break;
    366                 }
    367             }
    368         }
    369     }
    370 }
    371