aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/main.go
blob: da3a6c427c5d7086bfc7b2f20e66d4db782d4294 (plain) (blame)
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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/* SPDX-License-Identifier: MIT
 *
 * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
 */

package main

import (
	"fmt"
	"os"
	"strconv"
	"strings"
	"time"

	"golang.org/x/sys/windows"
	"golang.zx2c4.com/wireguard/tun/wintun"

	"golang.zx2c4.com/wireguard/windows/elevate"
	"golang.zx2c4.com/wireguard/windows/manager"
	"golang.zx2c4.com/wireguard/windows/ringlogger"
	"golang.zx2c4.com/wireguard/windows/ui"
)

var flags = [...]string{
	"(no argument): elevate and install manager service for current user",
	"/installmanagerservice",
	"/installtunnelservice CONFIG_PATH",
	"/uninstallmanagerservice",
	"/uninstalltunnelservice TUNNEL_NAME",
	"/managerservice",
	"/tunnelservice CONFIG_PATH",
	"/ui CMD_READ_HANDLE CMD_WRITE_HANDLE CMD_EVENT_HANDLE LOG_MAPPING_HANDLE",
	"/dumplog OUTPUT_PATH",
	"/wintun /deleteall",
}

func fatal(v ...interface{}) {
	windows.MessageBox(0, windows.StringToUTF16Ptr(fmt.Sprint(v...)), windows.StringToUTF16Ptr("Error"), windows.MB_ICONERROR)
	os.Exit(1)
}

func info(title string, format string, v ...interface{}) {
	windows.MessageBox(0, windows.StringToUTF16Ptr(fmt.Sprintf(format, v...)), windows.StringToUTF16Ptr(title), windows.MB_ICONINFORMATION)
}

func usage() {
	builder := strings.Builder{}
	for _, flag := range flags {
		builder.WriteString(fmt.Sprintf("    %s\n", flag))
	}
	info("Command Line Options", "Usage: %s [\n%s]", os.Args[0], builder.String())
	os.Exit(1)
}

func checkForWow64() {
	var b bool
	p, err := windows.GetCurrentProcess()
	if err != nil {
		fatal(err)
	}
	err = windows.IsWow64Process(p, &b)
	if err != nil {
		fatal("Unable to determine whether the process is running under WOW64: ", err)
	}
	if b {
		fatal("You must use the 64-bit version of WireGuard on this computer.")
	}
}

func checkForAdminGroup() {
	// This is not a security check, but rather a user-confusion one.
	processToken, err := windows.OpenCurrentProcessToken()
	if err != nil {
		fatal("Unable to open current process token: ", err)
	}
	defer processToken.Close()
	if !elevate.TokenIsMemberOfBuiltInAdministrator(processToken) {
		fatal("WireGuard may only be used by users who are a member of the Builtin Administrators group.")
	}
}

func execElevatedManagerServiceInstaller() error {
	path, err := os.Executable()
	if err != nil {
		return err
	}
	err = elevate.ShellExecute(path, "/installmanagerservice", "", windows.SW_SHOW)
	if err != nil {
		return err
	}
	os.Exit(0)
	return windows.ERROR_ACCESS_DENIED // Not reached
}

func pipeFromHandleArgument(handleStr string) (*os.File, error) {
	handleInt, err := strconv.ParseUint(handleStr, 10, 64)
	if err != nil {
		return nil, err
	}
	return os.NewFile(uintptr(handleInt), "pipe"), nil
}

func main() {
	checkForWow64()

	if len(os.Args) <= 1 {
		checkForAdminGroup()
		if ui.RaiseUI() {
			return
		}
		err := execElevatedManagerServiceInstaller()
		if err != nil {
			fatal(err)
		}
		return
	}
	switch os.Args[1] {
	case "/installmanagerservice":
		if len(os.Args) != 2 {
			usage()
		}
		go ui.WaitForRaiseUIThenQuit()
		err := manager.InstallManager()
		if err != nil {
			fatal(err)
		}
		time.Sleep(30 * time.Second)
		fatal("WireGuard system tray icon did not appear after 30 seconds.")
		return
	case "/uninstallmanagerservice":
		if len(os.Args) != 2 {
			usage()
		}
		err := manager.UninstallManager()
		if err != nil {
			fatal(err)
		}
		return
	case "/managerservice":
		if len(os.Args) != 2 {
			usage()
		}
		err := manager.RunManager()
		if err != nil {
			fatal(err)
		}
		return
	case "/installtunnelservice":
		if len(os.Args) != 3 {
			usage()
		}
		err := manager.InstallTunnel(os.Args[2])
		if err != nil {
			fatal(err)
		}
		return
	case "/uninstalltunnelservice":
		if len(os.Args) != 3 {
			usage()
		}
		err := manager.UninstallTunnel(os.Args[2])
		if err != nil {
			fatal(err)
		}
		return
	case "/tunnelservice":
		if len(os.Args) != 3 {
			usage()
		}
		err := manager.RunTunnel(os.Args[2])
		if err != nil {
			fatal(err)
		}
		return
	case "/ui":
		if len(os.Args) != 6 {
			usage()
		}
		err := elevate.DropAllPrivileges(false)
		if err != nil {
			fatal(err)
		}
		readPipe, err := pipeFromHandleArgument(os.Args[2])
		if err != nil {
			fatal(err)
		}
		writePipe, err := pipeFromHandleArgument(os.Args[3])
		if err != nil {
			fatal(err)
		}
		eventPipe, err := pipeFromHandleArgument(os.Args[4])
		if err != nil {
			fatal(err)
		}
		ringlogger.Global, err = ringlogger.NewRingloggerFromInheritedMappingHandle(os.Args[5], "GUI")
		if err != nil {
			fatal(err)
		}
		manager.InitializeIPCClient(readPipe, writePipe, eventPipe)
		ui.RunUI()
		return
	case "/dumplog":
		if len(os.Args) != 3 {
			usage()
		}
		file, err := os.Create(os.Args[2])
		if err != nil {
			fatal(err)
		}
		defer file.Close()
		err = ringlogger.DumpTo(file, true)
		if err != nil {
			fatal(err)
		}
		return
	case "/wintun":
		if len(os.Args) < 3 {
			usage()
		}
		switch os.Args[2] {
		case "/deleteall":
			if len(os.Args) != 3 {
				usage()
			}
			deleted, rebootRequired, errors := wintun.DeleteAllInterfaces()
			interfaceString := "no interfaces"
			if len(deleted) > 0 {
				interfaceString = fmt.Sprintf("interfaces %v", deleted)
			}
			errorString := ""
			if len(errors) > 0 {
				errorString = fmt.Sprintf(", encountering errors %v", errors)
			}
			rebootString := ""
			if rebootRequired {
				rebootString = " A reboot is required."
			}
			info("Wintun Cleanup", "Deleted %s%s.%s", interfaceString, errorString, rebootString)
			return
		default:
			usage()
		}
	}
	usage()
}