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      1 /*
      2  * Copyright (C) 2011 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.vpn2;
     18 
     19 import java.nio.charset.Charsets;
     20 
     21 /**
     22  * Parcel-like entity class for VPN profiles. To keep things simple, all
     23  * fields are package private. Methods are provided for serialization, so
     24  * storage can be implemented easily. Two rules are set for this class.
     25  * First, all fields must be kept non-null. Second, always make a copy
     26  * using clone() before modifying.
     27  */
     28 class VpnProfile implements Cloneable {
     29     // Match these constants with R.array.vpn_types.
     30     static final int TYPE_PPTP = 0;
     31     static final int TYPE_L2TP_IPSEC_PSK = 1;
     32     static final int TYPE_L2TP_IPSEC_RSA = 2;
     33     static final int TYPE_IPSEC_XAUTH_PSK = 3;
     34     static final int TYPE_IPSEC_XAUTH_RSA = 4;
     35     static final int TYPE_IPSEC_HYBRID_RSA = 5;
     36     static final int TYPE_MAX = 5;
     37 
     38     // Entity fields.
     39     final String key;           // -1
     40     String name = "";           // 0
     41     int type = TYPE_PPTP;       // 1
     42     String server = "";         // 2
     43     String username = "";       // 3
     44     String password = "";       // 4
     45     String dnsServers = "";     // 5
     46     String searchDomains = "";  // 6
     47     String routes = "";         // 7
     48     boolean mppe = true;        // 8
     49     String l2tpSecret = "";     // 9
     50     String ipsecIdentifier = "";// 10
     51     String ipsecSecret = "";    // 11
     52     String ipsecUserCert = "";  // 12
     53     String ipsecCaCert = "";    // 13
     54     String ipsecServerCert = "";// 14
     55 
     56     // Helper fields.
     57     boolean saveLogin = false;
     58 
     59     VpnProfile(String key) {
     60         this.key = key;
     61     }
     62 
     63     static VpnProfile decode(String key, byte[] value) {
     64         try {
     65             if (key == null) {
     66                 return null;
     67             }
     68 
     69             String[] values = new String(value, Charsets.UTF_8).split("\0", -1);
     70             // There can be 14 or 15 values in ICS MR1.
     71             if (values.length < 14 || values.length > 15) {
     72                 return null;
     73             }
     74 
     75             VpnProfile profile = new VpnProfile(key);
     76             profile.name = values[0];
     77             profile.type = Integer.valueOf(values[1]);
     78             if (profile.type < 0 || profile.type > TYPE_MAX) {
     79                 return null;
     80             }
     81             profile.server = values[2];
     82             profile.username = values[3];
     83             profile.password = values[4];
     84             profile.dnsServers = values[5];
     85             profile.searchDomains = values[6];
     86             profile.routes = values[7];
     87             profile.mppe = Boolean.valueOf(values[8]);
     88             profile.l2tpSecret = values[9];
     89             profile.ipsecIdentifier = values[10];
     90             profile.ipsecSecret = values[11];
     91             profile.ipsecUserCert = values[12];
     92             profile.ipsecCaCert = values[13];
     93             profile.ipsecServerCert = (values.length > 14) ? values[14] : "";
     94 
     95             profile.saveLogin = !profile.username.isEmpty() || !profile.password.isEmpty();
     96             return profile;
     97         } catch (Exception e) {
     98             // ignore
     99         }
    100         return null;
    101     }
    102 
    103     byte[] encode() {
    104         StringBuilder builder = new StringBuilder(name);
    105         builder.append('\0').append(type);
    106         builder.append('\0').append(server);
    107         builder.append('\0').append(saveLogin ? username : "");
    108         builder.append('\0').append(saveLogin ? password : "");
    109         builder.append('\0').append(dnsServers);
    110         builder.append('\0').append(searchDomains);
    111         builder.append('\0').append(routes);
    112         builder.append('\0').append(mppe);
    113         builder.append('\0').append(l2tpSecret);
    114         builder.append('\0').append(ipsecIdentifier);
    115         builder.append('\0').append(ipsecSecret);
    116         builder.append('\0').append(ipsecUserCert);
    117         builder.append('\0').append(ipsecCaCert);
    118         builder.append('\0').append(ipsecServerCert);
    119         return builder.toString().getBytes(Charsets.UTF_8);
    120     }
    121 }
    122