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Use Wireguard's DoAsSystem, fix build tags and go.mod/go.sum

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This commit is contained in:
Neil Alexander 2019-11-23 13:46:05 +00:00
parent 0529910b01
commit d0a307db97
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GPG key ID: A02A2019A2BB0944
3 changed files with 18 additions and 100 deletions
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89
src/tuntap/tun_windows.go
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@ -1,3 +1,5 @@
// +build windows
package tuntap
import (
@ -5,14 +7,12 @@ import (
"errors"
"log"
"net"
"runtime"
"strings"
"unsafe"
"github.com/yggdrasil-network/yggdrasil-go/src/defaults"
"golang.org/x/sys/windows"
wgtun "golang.zx2c4.com/wireguard/tun"
"golang.zx2c4.com/wireguard/windows/elevate"
"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
)
@ -25,7 +25,7 @@ func (tun *TunAdapter) setup(ifname string, addr string, mtu int) error {
}
var err error
var iface wgtun.Device
err = doAsSystem(func() {
err = elevate.DoAsSystem(func() {
if guid, gerr := windows.GUIDFromString("{8f59971a-7872-4aa6-b2eb-061fc4e9d0a7}"); gerr == nil {
iface, err = wgtun.CreateTUNWithRequestedGUID(ifname, &guid, mtu)
} else {
@ -107,87 +107,6 @@ func (tun *TunAdapter) setupAddress(addr string) error {
return nil
}
/*
* doAsSystem
* SPDX-License-Identifier: LGPL-3.0
* Copyright (C) 2017-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
func doAsSystem(f func()) error {
runtime.LockOSThread()
defer func() {
windows.RevertToSelf()
runtime.UnlockOSThread()
}()
privileges := windows.Tokenprivileges{
PrivilegeCount: 1,
Privileges: [1]windows.LUIDAndAttributes{
{
Attributes: windows.SE_PRIVILEGE_ENABLED,
},
},
}
err := windows.LookupPrivilegeValue(nil, windows.StringToUTF16Ptr("SeDebugPrivilege"), &privileges.Privileges[0].Luid)
if err != nil {
return err
}
err = windows.ImpersonateSelf(windows.SecurityImpersonation)
if err != nil {
return err
}
var threadToken windows.Token
err = windows.OpenThreadToken(windows.CurrentThread(), windows.TOKEN_ADJUST_PRIVILEGES, false, &threadToken)
if err != nil {
return err
}
defer threadToken.Close()
err = windows.AdjustTokenPrivileges(threadToken, false, &privileges, uint32(unsafe.Sizeof(privileges)), nil, nil)
if err != nil {
return err
}
processes, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0)
if err != nil {
return err
}
defer windows.CloseHandle(processes)
processEntry := windows.ProcessEntry32{Size: uint32(unsafe.Sizeof(windows.ProcessEntry32{}))}
pid := uint32(0)
for err = windows.Process32First(processes, &processEntry); err == nil; err = windows.Process32Next(processes, &processEntry) {
if strings.ToLower(windows.UTF16ToString(processEntry.ExeFile[:])) == "winlogon.exe" {
pid = processEntry.ProcessID
break
}
}
if pid == 0 {
return errors.New("unable to find winlogon.exe process")
}
winlogonProcess, err := windows.OpenProcess(windows.PROCESS_QUERY_INFORMATION, false, pid)
if err != nil {
return err
}
defer windows.CloseHandle(winlogonProcess)
var winlogonToken windows.Token
err = windows.OpenProcessToken(winlogonProcess, windows.TOKEN_IMPERSONATE|windows.TOKEN_DUPLICATE, &winlogonToken)
if err != nil {
return err
}
defer winlogonToken.Close()
var duplicatedToken windows.Token
err = windows.DuplicateTokenEx(winlogonToken, 0, nil, windows.SecurityImpersonation, windows.TokenImpersonation, &duplicatedToken)
if err != nil {
return err
}
defer duplicatedToken.Close()
err = windows.SetThreadToken(nil, duplicatedToken)
if err != nil {
return err
}
f()
return nil
}
/*
* cleanupAddressesOnDisconnectedInterfaces
* SPDX-License-Identifier: MIT