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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2020 WireGuard LLC. All Rights Reserved.
*/
package elevate
import (
"path/filepath"
"runtime"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/registry"
"golang.zx2c4.com/wireguard/windows/version"
)
const (
releaseOffset = 2
shellExecuteOffset = 9
cSEE_MASK_DEFAULT = 0
)
func ShellExecute(program string, arguments string, directory string, show int32) (err error) {
var (
program16 *uint16
arguments16 *uint16
directory16 *uint16
)
if len(program) > 0 {
program16, _ = windows.UTF16PtrFromString(program)
}
if len(arguments) > 0 {
arguments16, _ = windows.UTF16PtrFromString(arguments)
}
if len(directory) > 0 {
directory16, _ = windows.UTF16PtrFromString(directory)
}
defer func() {
if err != nil && program16 != nil {
err = windows.ShellExecute(0, windows.StringToUTF16Ptr("runas"), program16, arguments16, directory16, show)
}
}()
if !version.IsRunningEVSigned() {
err = windows.ERROR_INSUFFICIENT_LOGON_INFO
return
}
var processToken windows.Token
err = windows.OpenProcessToken(windows.CurrentProcess(), windows.TOKEN_QUERY|windows.TOKEN_DUPLICATE, &processToken)
if err != nil {
return
}
defer processToken.Close()
if processToken.IsElevated() {
err = windows.ERROR_SUCCESS
return
}
if !TokenIsElevatedOrElevatable(processToken) {
err = windows.ERROR_ACCESS_DENIED
return
}
key, err := registry.OpenKey(registry.LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System", registry.QUERY_VALUE)
if err != nil {
return
}
promptBehavior, _, err := key.GetIntegerValue("ConsentPromptBehaviorAdmin")
key.Close()
if err != nil {
return
}
if uint32(promptBehavior) == 0 {
err = windows.ERROR_SUCCESS
return
}
if uint32(promptBehavior) != 5 {
err = windows.ERROR_ACCESS_DENIED
return
}
key, err = registry.OpenKey(registry.LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\UAC\\COMAutoApprovalList", registry.QUERY_VALUE)
if err == nil {
var autoApproved uint64
autoApproved, _, err = key.GetIntegerValue("{3E5FC7F9-9A51-4367-9063-A120244FBEC7}")
key.Close()
if err != nil {
return
}
if uint32(autoApproved) == 0 {
err = windows.ERROR_ACCESS_DENIED
return
}
}
dataTableEntry, err := findCurrentDataTableEntry()
if err != nil {
return
}
windowsDirectory, err := windows.GetSystemWindowsDirectory()
if err != nil {
return
}
originalPath := dataTableEntry.FullDllName.Buffer
explorerPath := windows.StringToUTF16Ptr(filepath.Join(windowsDirectory, "explorer.exe"))
rtlInitUnicodeString(&dataTableEntry.FullDllName, explorerPath)
defer func() {
rtlInitUnicodeString(&dataTableEntry.FullDllName, originalPath)
runtime.KeepAlive(explorerPath)
}()
if err = coInitializeEx(0, cCOINIT_APARTMENTTHREADED); err == nil {
defer coUninitialize()
}
var interfacePointer **[0xffff]uintptr
if err = coGetObject(
windows.StringToUTF16Ptr("Elevation:Administrator!new:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}"),
&cBIND_OPTS3{
cbStruct: uint32(unsafe.Sizeof(cBIND_OPTS3{})),
dwClassContext: cCLSCTX_LOCAL_SERVER,
},
&windows.GUID{0x6EDD6D74, 0xC007, 0x4E75, [8]byte{0xB7, 0x6A, 0xE5, 0x74, 0x09, 0x95, 0xE2, 0x4C}},
&interfacePointer,
); err != nil {
return
}
defer syscall.Syscall((*interfacePointer)[releaseOffset], 1, uintptr(unsafe.Pointer(interfacePointer)), 0, 0)
if program16 == nil {
return
}
if ret, _, _ := syscall.Syscall6((*interfacePointer)[shellExecuteOffset], 6,
uintptr(unsafe.Pointer(interfacePointer)),
uintptr(unsafe.Pointer(program16)),
uintptr(unsafe.Pointer(arguments16)),
uintptr(unsafe.Pointer(directory16)),
cSEE_MASK_DEFAULT,
uintptr(show),
); ret != uintptr(windows.ERROR_SUCCESS) {
err = syscall.Errno(ret)
return
}
err = nil
return
}
|
