1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.util;
import android.content.Context;
import androidx.annotation.Nullable;
import android.system.OsConstants;
import android.util.Log;
import com.wireguard.android.Application;
import com.wireguard.android.BuildConfig;
import com.wireguard.android.R;
import com.wireguard.android.util.RootShell.NoRootException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
/**
* Helper to install WireGuard tools to the system partition.
*/
public final class ToolsInstaller {
public static final int ERROR = 0x0;
public static final int MAGISK = 0x4;
public static final int NO = 0x2;
public static final int SYSTEM = 0x8;
public static final int YES = 0x1;
private static final String[][] EXECUTABLES = {
{"libwg.so", "wg"},
{"libwg-quick.so", "wg-quick"},
};
private static final File[] INSTALL_DIRS = {
new File("/system/xbin"),
new File("/system/bin"),
};
@Nullable private static final File INSTALL_DIR = getInstallDir();
private static final String TAG = "WireGuard/" + ToolsInstaller.class.getSimpleName();
private final Context context;
private final File localBinaryDir;
private final Object lock = new Object();
private final File nativeLibraryDir;
@Nullable private Boolean areToolsAvailable;
@Nullable private Boolean installAsMagiskModule;
public ToolsInstaller(final Context context) {
localBinaryDir = new File(context.getCacheDir(), "bin");
nativeLibraryDir = new File(context.getApplicationInfo().nativeLibraryDir);
this.context = context;
}
@Nullable
private static File getInstallDir() {
final String path = System.getenv("PATH");
if (path == null)
return INSTALL_DIRS[0];
final List<String> paths = Arrays.asList(path.split(":"));
for (final File dir : INSTALL_DIRS) {
if (paths.contains(dir.getPath()) && dir.isDirectory())
return dir;
}
return null;
}
public int areInstalled() throws NoRootException {
if (INSTALL_DIR == null)
return ERROR;
final StringBuilder script = new StringBuilder();
for (final String[] names : EXECUTABLES) {
script.append(String.format("cmp -s '%s' '%s' && ",
new File(nativeLibraryDir, names[0]),
new File(INSTALL_DIR, names[1])));
}
script.append("exit ").append(OsConstants.EALREADY).append(';');
try {
final int ret = Application.getRootShell().run(null, script.toString());
if (ret == OsConstants.EALREADY)
return willInstallAsMagiskModule() ? YES | MAGISK : YES | SYSTEM;
else
return willInstallAsMagiskModule() ? NO | MAGISK : NO | SYSTEM;
} catch (final IOException ignored) {
return ERROR;
}
}
public void ensureToolsAvailable() throws FileNotFoundException, NoRootException {
synchronized (lock) {
if (areToolsAvailable == null) {
final int ret = symlink();
if (ret == OsConstants.EALREADY) {
Log.d(TAG, "Tools were already symlinked into our private binary dir");
areToolsAvailable = true;
} else if (ret == OsConstants.EXIT_SUCCESS) {
Log.d(TAG, "Tools are now symlinked into our private binary dir");
areToolsAvailable = true;
} else {
Log.e(TAG, "For some reason, wg and wg-quick are not available at all");
areToolsAvailable = false;
}
}
if (!areToolsAvailable)
throw new FileNotFoundException(
context.getString(R.string.tools_unavailable_error));
}
}
public int install() throws NoRootException {
return willInstallAsMagiskModule() ? installMagisk() : installSystem();
}
private int installMagisk() throws NoRootException {
final StringBuilder script = new StringBuilder("set -ex; ");
script.append("trap 'rm -rf /sbin/.magisk/img/wireguard' INT TERM EXIT; ");
script.append(String.format("rm -rf /sbin/.magisk/img/wireguard/; mkdir -p /sbin/.magisk/img/wireguard%s; ", INSTALL_DIR));
script.append(String.format("printf 'name=WireGuard Command Line Tools\nversion=%s\nversionCode=%s\nauthor=zx2c4\ndescription=Command line tools for WireGuard\nminMagisk=1500\n' > /sbin/.magisk/img/wireguard/module.prop; ", BuildConfig.VERSION_NAME, BuildConfig.VERSION_CODE));
script.append("touch /sbin/.magisk/img/wireguard/auto_mount; ");
for (final String[] names : EXECUTABLES) {
final File destination = new File("/sbin/.magisk/img/wireguard" + INSTALL_DIR, names[1]);
script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; chcon 'u:object_r:system_file:s0' '%s' || true; ",
new File(nativeLibraryDir, names[0]), destination, destination, destination));
}
script.append("trap - INT TERM EXIT;");
try {
return Application.getRootShell().run(null, script.toString()) == 0 ? YES | MAGISK : ERROR;
} catch (final IOException ignored) {
return ERROR;
}
}
private int installSystem() throws NoRootException {
if (INSTALL_DIR == null)
return OsConstants.ENOENT;
final StringBuilder script = new StringBuilder("set -ex; ");
script.append("trap 'mount -o ro,remount /system' EXIT; mount -o rw,remount /system; ");
for (final String[] names : EXECUTABLES) {
final File destination = new File(INSTALL_DIR, names[1]);
script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; restorecon '%s' || true; ",
new File(nativeLibraryDir, names[0]), destination, destination, destination));
}
try {
return Application.getRootShell().run(null, script.toString()) == 0 ? YES | SYSTEM : ERROR;
} catch (final IOException ignored) {
return ERROR;
}
}
public int symlink() throws NoRootException {
final StringBuilder script = new StringBuilder("set -x; ");
for (final String[] names : EXECUTABLES) {
script.append(String.format("test '%s' -ef '%s' && ",
new File(nativeLibraryDir, names[0]),
new File(localBinaryDir, names[1])));
}
script.append("exit ").append(OsConstants.EALREADY).append("; set -e; ");
for (final String[] names : EXECUTABLES) {
script.append(String.format("ln -fns '%s' '%s'; ",
new File(nativeLibraryDir, names[0]),
new File(localBinaryDir, names[1])));
}
script.append("exit ").append(OsConstants.EXIT_SUCCESS).append(';');
try {
return Application.getRootShell().run(null, script.toString());
} catch (final IOException ignored) {
return OsConstants.EXIT_FAILURE;
}
}
private boolean willInstallAsMagiskModule() {
synchronized (lock) {
if (installAsMagiskModule == null) {
try {
installAsMagiskModule = Application.getRootShell().run(null, "[ -d /sbin/.magisk/mirror -a -d /sbin/.magisk/img -a ! -f /cache/.disable_magisk ]") == OsConstants.EXIT_SUCCESS;
} catch (final Exception ignored) {
installAsMagiskModule = false;
}
}
return installAsMagiskModule;
}
}
}
|
