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
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package elevate
import (
"path/filepath"
"runtime"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/registry"
)
const (
releaseOffset = 2
shellExecuteOffset = 9
cSEE_MASK_DEFAULT = 0
)
/* We could use the undocumented LdrFindEntryForAddress function instead, but that's undocumented, and we're trying
* to be as rock-solid as possible here. */
func findCurrentDataTableEntry() (entry *cLDR_DATA_TABLE_ENTRY, err error) {
peb := rtlGetCurrentPeb()
if peb == nil || peb.Ldr == nil {
err = windows.ERROR_INVALID_ADDRESS
return
}
for cur := peb.Ldr.InMemoryOrderModuleList.Flink; cur != &peb.Ldr.InMemoryOrderModuleList; cur = cur.Flink {
entry = (*cLDR_DATA_TABLE_ENTRY)(unsafe.Pointer(uintptr(unsafe.Pointer(cur)) - unsafe.Offsetof(cLDR_DATA_TABLE_ENTRY{}.InMemoryOrderLinks)))
if entry.DllBase == peb.ImageBaseAddress {
return
}
}
entry = nil
err = windows.ERROR_OBJECT_NOT_FOUND
return
}
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 {
err = windows.ShellExecute(0, windows.StringToUTF16Ptr("runas"), program16, arguments16, directory16, show)
}
}()
processToken, err := windows.OpenCurrentProcessToken()
if err != nil {
return
}
defer processToken.Close()
if processToken.IsElevated() {
err = windows.ERROR_SUCCESS
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
}
processParameters := rtlGetCurrentPeb().ProcessParameters
fullDllName := dataTableEntry.FullDllName.Buffer
baseDllName := dataTableEntry.BaseDllName.Buffer
imagePathName := processParameters.ImagePathName.Buffer
dllPath := processParameters.DllPath.Buffer
commandLine := processParameters.CommandLine.Buffer
var windowsDirectory [windows.MAX_PATH]uint16
if _, err = getWindowsDirectory(&windowsDirectory[0], windows.MAX_PATH); err != nil {
return
}
explorerPath := windows.StringToUTF16Ptr(filepath.Join(windows.UTF16ToString(windowsDirectory[:]), "explorer.exe"))
explorerName := windows.StringToUTF16Ptr("explorer.exe")
rtlInitUnicodeString(&dataTableEntry.FullDllName, explorerPath)
rtlInitUnicodeString(&processParameters.ImagePathName, explorerPath)
rtlInitUnicodeString(&processParameters.DllPath, explorerPath)
rtlInitUnicodeString(&dataTableEntry.BaseDllName, explorerName)
rtlInitUnicodeString(&processParameters.CommandLine, explorerName)
defer func() {
rtlInitUnicodeString(&processParameters.CommandLine, commandLine)
rtlInitUnicodeString(&dataTableEntry.BaseDllName, baseDllName)
rtlInitUnicodeString(&processParameters.DllPath, dllPath)
rtlInitUnicodeString(&processParameters.ImagePathName, imagePathName)
rtlInitUnicodeString(&dataTableEntry.FullDllName, fullDllName)
runtime.KeepAlive(explorerPath)
runtime.KeepAlive(explorerName)
}()
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 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
}
|
