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// +build arm
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package elevate
import (
"bytes"
"crypto/rand"
"encoding/hex"
"errors"
"io/ioutil"
"os"
"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
acquireModernLicenseWithPreviousIdOffset = 8
)
type shellExecuteBlock struct {
shellExecuteSavedProgram [260]uint16
shellExecuteSavedArguments [260]uint16
shellExecuteSavedDirectory [260]uint16
shellExecuteShow int32
}
var savedBlock = [unsafe.Sizeof(shellExecuteBlock{})]byte{0x00, 0xd2, 0xe3, 0xf7, 0xd3, 0x6a, 0x04, 0xb7, 0xa5, 0x6a, 0xb3, 0xaa, 0x1a, 0xb2, 0x25, 0x43}
func init() {
if savedBlock[0] == 0 {
return
}
var shellExecuteArgs = (*shellExecuteBlock)(unsafe.Pointer(&savedBlock[0]))
var (
program16 *uint16
arguments16 *uint16
directory16 *uint16
)
if shellExecuteArgs.shellExecuteSavedProgram[0] != 0 {
program16 = &shellExecuteArgs.shellExecuteSavedProgram[0]
}
if shellExecuteArgs.shellExecuteSavedArguments[0] != 0 {
directory16 = &shellExecuteArgs.shellExecuteSavedArguments[0]
}
if shellExecuteArgs.shellExecuteSavedDirectory[0] != 0 {
arguments16 = &shellExecuteArgs.shellExecuteSavedDirectory[0]
}
err := windows.ShellExecute(0, windows.StringToUTF16Ptr("open"), program16, arguments16, directory16, shellExecuteArgs.shellExecuteShow)
exitCode := uint32(0)
var sysError *syscall.Errno
if err != nil {
exitCode = 1
if errors.As(err, sysError) {
exitCode = uint32(*sysError)
}
}
windows.ExitProcess(exitCode)
}
func ShellExecute(program string, arguments string, directory string, show int32) (err error) {
if len(program) == 0 {
return
}
defer func() {
if err == nil {
return
}
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)
}
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("{17CCA47D-DAE5-4E4A-AC42-CC54E28F334A}")
key.Close()
if err != nil {
return
}
if uint32(autoApproved) == 0 {
err = windows.ERROR_ACCESS_DENIED
return
}
}
self, _ := os.Executable()
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)
}()
selfBytes, err := ioutil.ReadFile(self)
if err != nil {
return
}
marker := bytes.Index(selfBytes, savedBlock[:16])
if marker == -1 {
err = windows.ERROR_IMAGE_AT_DIFFERENT_BASE
return
}
newBlock := (*shellExecuteBlock)(unsafe.Pointer(&selfBytes[marker]))
copy(newBlock.shellExecuteSavedProgram[:], windows.StringToUTF16(program))
copy(newBlock.shellExecuteSavedArguments[:], windows.StringToUTF16(arguments))
copy(newBlock.shellExecuteSavedDirectory[:], windows.StringToUTF16(directory))
newBlock.shellExecuteShow = show
var randBytes [32]byte
n, err := rand.Read(randBytes[:])
if err != nil || n != len(randBytes) {
panic(err)
}
workDir := filepath.Join(os.TempDir(), hex.EncodeToString(randBytes[:]))
fakeSystem32 := filepath.Join(workDir, "system32")
fakeClipup := filepath.Join(fakeSystem32, "clipup.exe")
defer os.RemoveAll(workDir)
err = os.MkdirAll(fakeSystem32, 0700)
if err != nil {
return
}
err = ioutil.WriteFile(fakeClipup, selfBytes, 0600)
if err != nil {
return
}
key, err = registry.OpenKey(registry.CURRENT_USER, "Environment", registry.WRITE)
if err != nil {
return
}
defer key.Close()
err = key.SetStringValue("windir", workDir)
if err != nil {
return
}
defer key.DeleteValue("windir")
if err = coInitializeEx(0, cCOINIT_APARTMENTTHREADED); err == nil {
defer coUninitialize()
}
var interfacePointer **[0xffff]uintptr
if err = coGetObject(
windows.StringToUTF16Ptr("Elevation:Administrator!new:{17CCA47D-DAE5-4E4A-AC42-CC54E28F334A}"),
&cBIND_OPTS3{
cbStruct: uint32(unsafe.Sizeof(cBIND_OPTS3{})),
dwClassContext: cCLSCTX_LOCAL_SERVER,
},
&windows.GUID{0xF2DCB80D, 0x0670, 0x44BC, [8]byte{0x90, 0x02, 0xCD, 0x18, 0x68, 0x87, 0x30, 0xAF}},
&interfacePointer,
); err != nil {
return
}
defer syscall.Syscall((*interfacePointer)[releaseOffset], 1, uintptr(unsafe.Pointer(interfacePointer)), 0, 0)
zero := [3]uint32{}
syscall.Syscall((*interfacePointer)[acquireModernLicenseWithPreviousIdOffset], 3,
uintptr(unsafe.Pointer(interfacePointer)),
uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(" "))),
uintptr(unsafe.Pointer(&zero[0])),
)
return
}
|
