1/*
2 * Copyright 2016, 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
17package com.android.managedprovisioning.task.wifi;
18
19import android.net.IpConfiguration.ProxySettings;
20import android.net.ProxyInfo;
21import android.net.wifi.WifiConfiguration;
22import android.text.TextUtils;
23
24import com.android.internal.annotations.VisibleForTesting;
25import com.android.managedprovisioning.model.WifiInfo;
26
27/**
28 * Utility class for configuring a new {@link WifiConfiguration} object from the provisioning
29 * parameters represented via {@link WifiInfo}.
30 */
31public class WifiConfigurationProvider {
32
33    @VisibleForTesting
34    static final String WPA = "WPA";
35    @VisibleForTesting
36    static final String WEP = "WEP";
37    @VisibleForTesting
38    static final String NONE = "NONE";
39
40    /**
41     * Create a {@link WifiConfiguration} object from the internal representation given via
42     * {@link WifiInfo}.
43     */
44    public WifiConfiguration generateWifiConfiguration(WifiInfo wifiInfo) {
45        WifiConfiguration wifiConf = new WifiConfiguration();
46        wifiConf.SSID = wifiInfo.ssid;
47        wifiConf.status = WifiConfiguration.Status.ENABLED;
48        wifiConf.hiddenSSID = wifiInfo.hidden;
49        wifiConf.userApproved = WifiConfiguration.USER_APPROVED;
50        String securityType = wifiInfo.securityType != null ? wifiInfo.securityType : NONE;
51        switch (securityType) {
52            case WPA:
53                updateForWPAConfiguration(wifiConf, wifiInfo.password);
54                break;
55            case WEP:
56                updateForWEPConfiguration(wifiConf, wifiInfo.password);
57                break;
58            default: // NONE
59                wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
60                wifiConf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
61                break;
62        }
63
64        updateForProxy(
65                wifiConf,
66                wifiInfo.proxyHost,
67                wifiInfo.proxyPort,
68                wifiInfo.proxyBypassHosts,
69                wifiInfo.pacUrl);
70        return wifiConf;
71    }
72
73    private void updateForWPAConfiguration(WifiConfiguration wifiConf, String wifiPassword) {
74        wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
75        wifiConf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
76        wifiConf.allowedProtocols.set(WifiConfiguration.Protocol.WPA); // For WPA
77        wifiConf.allowedProtocols.set(WifiConfiguration.Protocol.RSN); // For WPA2
78        wifiConf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
79        wifiConf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
80        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
81        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
82        if (!TextUtils.isEmpty(wifiPassword)) {
83            wifiConf.preSharedKey = "\"" + wifiPassword + "\"";
84        }
85    }
86
87    private void updateForWEPConfiguration(WifiConfiguration wifiConf, String password) {
88        wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
89        wifiConf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
90        wifiConf.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
91        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
92        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
93        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
94        wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
95        int length = password.length();
96        if ((length == 10 || length == 26 || length == 58) && password.matches("[0-9A-Fa-f]*")) {
97            wifiConf.wepKeys[0] = password;
98        } else {
99            wifiConf.wepKeys[0] = '"' + password + '"';
100        }
101        wifiConf.wepTxKeyIndex = 0;
102    }
103
104    private void updateForProxy(WifiConfiguration wifiConf, String proxyHost, int proxyPort,
105            String proxyBypassHosts, String pacUrl) {
106        if (TextUtils.isEmpty(proxyHost) && TextUtils.isEmpty(pacUrl)) {
107            return;
108        }
109        if (!TextUtils.isEmpty(proxyHost)) {
110            ProxyInfo proxy = new ProxyInfo(proxyHost, proxyPort, proxyBypassHosts);
111            wifiConf.setProxy(ProxySettings.STATIC, proxy);
112        } else {
113            ProxyInfo proxy = new ProxyInfo(pacUrl);
114            wifiConf.setProxy(ProxySettings.PAC, proxy);
115        }
116    }
117}
118