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Nextcloud-Desktop/admin/win/nsi/nsis_uac/RunAs.cpp

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//Copyright (C) 2007 Anders Kjersem. Licensed under the zlib/libpng license, see License.txt for details.
/*
If UAC is disabled, the runas verb is broken (Vista RTM) so when running as LUA there is no way to elevate so
we provide our own dialog.
*/
#include "UAC.h"
#ifdef FEAT_CUSTOMRUNASDLG
#include <Lmcons.h>//UNLEN && GNLEN && PWLEN
#include <WindowsX.h>
#include "resource.h"
#include "NSISUtil.h"
using namespace NSIS;
#define ERRAPP_TRYAGAIN (0x20000000|1)
#define MYMAX_DOMAIN (2+max(GNLEN,MAX_COMPUTERNAME_LENGTH)+1)
static LPCTSTR g_RunAsDlgTitle=_T("Run as");
static LPCTSTR g_RunAsHelpText=_T("You may not have the necessary permissions to use all the features of the program you are about to run. You may run this program as a different user or continue to run the program as the current user.");
static LPCTSTR g_RunAsCurrUsrFmt=_T("&Current user (%s)");//Max 50 chars!
static LPCTSTR g_RunAsSpecHelp=_T("Run the program as the &following user:");
FORCEINLINE bool MySetDlgItemText(HWND hDlg,int id,LPCTSTR s) {return MySndDlgItemMsg(hDlg,id,WM_SETTEXT,0,(LPARAM)s)!=0;}
typedef struct {
SHELLEXECUTEINFO*pSEI;
bool AsSelf;
} RUNASDLGDATA;
void MyRunAsFmtCurrUserRadio(HWND hDlg,LPCTSTR Fmt) {
TCHAR bufFullName[MYMAX_DOMAIN+UNLEN+1];
TCHAR buf[50+MYMAX_DOMAIN+UNLEN+1];
*bufFullName=0;
ULONG cch;
if ((!_GetUserNameEx || !_GetUserNameEx(NameSamCompatible,bufFullName,&(cch=COUNTOF(bufFullName)))) &&
!_GetUserName(bufFullName,&(cch=COUNTOF(bufFullName))) ) {
*bufFullName=0;
}
wsprintf(buf,Fmt,*bufFullName?bufFullName:_T("?"));
MySetDlgItemText(hDlg,IDC_RUNASCURR,buf);
// default the "User name:" to Administrator from shell32
if (LoadString(GetModuleHandle(_T("SHELL32.dll")),21763, bufFullName, COUNTOF(bufFullName)) > 0) {
MySetDlgItemText(hDlg,IDC_USERNAME,bufFullName);
}
}
#ifdef FEAT_CUSTOMRUNASDLG_TRANSLATE
void MyRunAsTranslateDlgString(LPCTSTR StrID,LPTSTR Ini,HWND hDlg,INT_PTR DlgItemId,int special=0) {
TCHAR buf[MAX_PATH*2];
DWORD len=GetPrivateProfileString(_T("MyRunAsStrings"),StrID,0,buf,ARRAYSIZE(buf),Ini);
if (len) {
if (IDC_RUNASCURR==special)
MyRunAsFmtCurrUserRadio(hDlg,buf);
else
(DlgItemId==-1) ? SetWindowText(hDlg,buf) : MySetDlgItemText(hDlg,DlgItemId,buf);
}
}
void MyRunAsTranslateDlg(HWND hDlg) {
DWORD len;
TCHAR buf[MAX_PATH*2];
HMODULE hDll=GetWindowInstance(hDlg);ASSERT(hDll);
if ( (len=GetModuleFileName(hDll,buf,ARRAYSIZE(buf))) <1)return;
buf[len-3]=0;
lstrcat(buf,_T("lng"));
MyRunAsTranslateDlgString(_T("DlgTitle"),buf,hDlg,-1);
MyRunAsTranslateDlgString(_T("HelpText"),buf,hDlg,IDC_HELPTEXT);
MyRunAsTranslateDlgString(_T("OptCurrUser"),buf,hDlg,IDC_RUNASCURR,IDC_RUNASCURR);
MyRunAsTranslateDlgString(_T("OptOtherUser"),buf,hDlg,IDC_RUNASSPEC);
MyRunAsTranslateDlgString(_T("Username"),buf,hDlg,IDC_LBLUSER);
MyRunAsTranslateDlgString(_T("Pwd"),buf,hDlg,IDC_LBLPWD);
MyRunAsTranslateDlgString(_T("OK"),buf,hDlg,IDOK);
MyRunAsTranslateDlgString(_T("Cancel"),buf,hDlg,IDCANCEL);
HWND h=GetDlgItem(hDlg,IDC_RUNASCURR);
if (GetPrivateProfileInt(_T("MyRunAsCfg"),_T("DisableCurrUserOpt"),false,buf))EnableWindow(h,false);
if (GetPrivateProfileInt(_T("MyRunAsCfg"),_T("HideCurrUserOpt"),false,buf))ShowWindow(h,false);
}
#endif
bool ErrorIsLogonError(DWORD err) {
switch (err) {
case ERROR_LOGON_FAILURE:
case ERROR_ACCOUNT_RESTRICTION:
case ERROR_INVALID_LOGON_HOURS:
case ERROR_INVALID_WORKSTATION:
case ERROR_PASSWORD_EXPIRED:
case ERROR_ACCOUNT_DISABLED:
case ERROR_NONE_MAPPED:
case ERROR_NO_SUCH_USER:
case ERROR_INVALID_ACCOUNT_NAME:
return true;
}
return false;
}
void VerifyOKBtn(HWND hDlg,RUNASDLGDATA*pRADD) {
const bool HasText=pRADD?(pRADD->AsSelf?true:MySndDlgItemMsg(hDlg,IDC_USERNAME,WM_GETTEXTLENGTH)>0):false;
EnableWindow(GetDlgItem(hDlg,IDOK),HasText);
}
void SetDlgState(HWND hDlg,bool AsSelf,RUNASDLGDATA*pRADD) {
if (pRADD)pRADD->AsSelf=AsSelf;
MySndDlgItemMsg(hDlg,IDC_RUNASCURR,BM_SETCHECK,AsSelf?BST_CHECKED:BST_UNCHECKED);
MySndDlgItemMsg(hDlg,IDC_RUNASSPEC,BM_SETCHECK,!AsSelf?BST_CHECKED:BST_UNCHECKED);
int ids[]={IDC_USERNAME,IDC_PASSWORD,IDC_LBLUSER,IDC_LBLPWD};
for (int i=0; i<COUNTOF(ids);++i)EnableWindow(GetDlgItem(hDlg,ids[i]),!AsSelf);
VerifyOKBtn(hDlg,pRADD);
}
INT_PTR CALLBACK MyRunAsDlgProc(HWND hwnd,UINT uMsg,WPARAM wp,LPARAM lp) {
RUNASDLGDATA*pRADD=(RUNASDLGDATA*)GetWindowLongPtr(hwnd,GWLP_USERDATA);
switch(uMsg) {
//case WM_DESTROY:
// break;
case WM_CLOSE:
return DestroyWindow(hwnd);
case WM_INITDIALOG:
{
pRADD=(RUNASDLGDATA*)lp;ASSERT(pRADD);
SetWindowLongPtr(hwnd,GWLP_USERDATA,lp);
Edit_LimitText(GetDlgItem(hwnd,IDC_USERNAME),UNLEN+1+MYMAX_DOMAIN); //room for "foo@BAR" or "BAR\foo"
Edit_LimitText(GetDlgItem(hwnd,IDC_PASSWORD),PWLEN);
const HINSTANCE hSh32=GetModuleHandle(_T("SHELL32.dll"));
const HICON hIco=(HICON)LoadImage(hSh32,MAKEINTRESOURCE(194),IMAGE_ICON,32,32,LR_SHARED);
MySndDlgItemMsg(hwnd,IDC_SHICON,STM_SETICON,(WPARAM)hIco);
SendMessage(hwnd,WM_SETTEXT,0,(LPARAM)g_RunAsDlgTitle);
MySetDlgItemText(hwnd,IDC_HELPTEXT,g_RunAsHelpText);
MyRunAsFmtCurrUserRadio(hwnd,g_RunAsCurrUsrFmt);
MySetDlgItemText(hwnd,IDC_RUNASSPEC,g_RunAsSpecHelp);
#ifdef FEAT_CUSTOMRUNASDLG_TRANSLATE
MyRunAsTranslateDlg(hwnd);
#endif
SetDlgState(hwnd,false,pRADD);
#if defined(BUILD_DBG) && 0 //auto login used during testing ;)
SetDlgItemText(hwnd,IDC_USERNAME,_T("root"));
SetDlgItemText(hwnd,IDC_PASSWORD,_T("???"));
Sleep(1);PostMessage(hwnd,WM_COMMAND,IDOK,0);
#endif
}
return true;
case WM_COMMAND:
{
switch(HIWORD(wp)) {
case EN_CHANGE:
VerifyOKBtn(hwnd,pRADD);
break;
case EN_SETFOCUS:
case BN_CLICKED:
if (LOWORD(wp)<=IDCANCEL)break;
SetDlgState(hwnd,LOWORD(wp)==IDC_RUNASCURR,pRADD);
return FALSE;
}
INT_PTR exitcode=!pRADD?-1:IDCANCEL;
switch(LOWORD(wp)) {
case IDOK:
if (pRADD) {
SHELLEXECUTEINFO&sei=*pRADD->pSEI;
PROCESS_INFORMATION pi={0};
DWORD ec=NO_ERROR;
WCHAR*wszExec;//Also used as TCHAR buffer in AsSelf mode
bool PerformTCharFmt=pRADD->AsSelf;
//const DWORD CommonStartupInfoFlags=STARTF_FORCEONFEEDBACK;
#ifdef UNICODE
PerformTCharFmt=true;
#endif
wszExec=(WCHAR*)NSIS::MemAlloc( (pRADD->AsSelf?sizeof(TCHAR):sizeof(WCHAR)) *(lstrlen(sei.lpFile)+1+lstrlen(sei.lpParameters)+1));
if (!wszExec)ec=ERROR_OUTOFMEMORY;
if (PerformTCharFmt)wsprintf((TCHAR*)wszExec,_T("%s%s%s"),sei.lpFile,((sei.lpParameters&&*sei.lpParameters)?_T(" "):_T("")),sei.lpParameters);
if (!ec) {
if (pRADD->AsSelf) {
STARTUPINFO si={sizeof(si)};
TRACEF("MyRunAs:CreateProcess:%s|\n",wszExec);
ec=(CreateProcess(0,(TCHAR*)wszExec,0,0,false,0,0,0,&si,&pi)?NO_ERROR:GetLastError());
}
else {
//All Wide strings!
WCHAR wszPwd[PWLEN+1];
WCHAR wszUName[UNLEN+1+MYMAX_DOMAIN+1];
STARTUPINFOW siw={sizeof(siw)};
WCHAR*p;
#ifndef UNICODE
//Build unicode string, we already know the buffer is big enough so no error handling
p=wszExec;
MultiByteToWideChar(CP_THREAD_ACP,0,sei.lpFile,-1,p,0xFFFFFF);
if (sei.lpParameters && *sei.lpParameters) {
p+=lstrlen(sei.lpFile);*p++=L' ';*p=0;
MultiByteToWideChar(CP_THREAD_ACP,0,sei.lpParameters,-1,p,0xFFFFFF);
}
#endif
SendMessageW(GetDlgItem(hwnd,IDC_USERNAME),WM_GETTEXT,COUNTOF(wszUName),(LPARAM)wszUName);
SendMessageW(GetDlgItem(hwnd,IDC_PASSWORD),WM_GETTEXT,COUNTOF(wszPwd),(LPARAM)wszPwd);
//Try to find [\\]domain\user and split into username and domain strings
WCHAR*pUName=wszUName,*pDomain=0;
p=wszUName;
//if (*p==p[1]=='\\')pUName=(p+=2);else \ //Should we still split things up if the string starts with \\ ? Is it possible to use \\machine\user at all?
++p;//Don't parse "\something", require at least one char before backslash "?[*\]something"
while(*p && *p!='\\')++p;
if (*p=='\\') {
pDomain=pUName;
pUName=p+1;*p=0;
}
TRACEF("MyRunAs:CreateProcessWithLogonW:%ws|%ws|%ws|%ws|\n",pUName,pDomain?pDomain:L"NO?DOMAIN",wszPwd,wszExec);
ec=(_CreateProcessWithLogonW(pUName,pDomain?pDomain:0,wszPwd,LOGON_WITH_PROFILE,0,wszExec,0,0,0,&siw,&pi)?NO_ERROR:GetLastError());
TRACEF("MyRunAs:CreateProcessWithLogonW: ret=%u\n",ec);
SecureZeroMemory(wszPwd,sizeof(wszPwd));//if (wszPwd) {volatile WCHAR*_p=wszPwd;for(;_p&&*_p;++_p)*_p=1;if (_p)*wszPwd=0;}//Burn password (And attempt to prevent compiler from removing it)
if (ec && ErrorIsLogonError(ec)) {
LPTSTR szMsg;
DWORD ret=FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,0,ec,MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),(LPTSTR)&szMsg,0,0);
if (ret) {
ec=ERRAPP_TRYAGAIN;
MessageBox(hwnd,szMsg,0,MB_ICONWARNING);
LocalFree(szMsg);
}
else ec=GetLastError();
}
}
}
NSIS::MemFree(wszExec);
if (pi.hThread)CloseHandle(pi.hThread);
if (ERRAPP_TRYAGAIN==ec)break;
if (ec) {
SetLastError(ec);
exitcode=-1;
}
else {
pRADD->pSEI->hProcess=pi.hProcess;
exitcode=IDOK;
}
}
case IDCANCEL:
EndDialog(hwnd,exitcode);
}
}
break;
}
return FALSE;
}
DWORD MyRunAs(HINSTANCE hInstDll,SHELLEXECUTEINFO&sei) {
INT_PTR ec;
ASSERT(sei.cbSize>=sizeof(SHELLEXECUTEINFO) && hInstDll);
if (ec=DelayLoadDlls())return ec;
ASSERT(_CreateProcessWithLogonW && _GetUserName);
RUNASDLGDATA radd={0};
radd.pSEI=&sei;
ec=DialogBoxParam(hInstDll,MAKEINTRESOURCE(IDD_MYRUNAS),sei.hwnd,MyRunAsDlgProc,(LPARAM)&radd);
TRACEF("MyRunAs returned %d (%s|%s)\n",ec,sei.lpFile,sei.lpParameters);
switch(ec) {
case 0:
return ERROR_INVALID_HANDLE;//DialogBoxParam returns 0 on bad hwnd
case IDOK:
return NO_ERROR;
case IDCANCEL:
return ERROR_CANCELLED;
}
//TODO:BUGBUG: on vista, the last error seems to get lost, should probably put it in RUNASDLGDATA and always return IDOK
return GetLastError();
}
#ifdef BUILD_DBG
// RunDll exports are __stdcall, we dont care about that for this debug export, rundll32.exe is able to handle this mistake
extern "C" void __declspec(dllexport) __cdecl DBGRDMyRunAs(HWND hwnd,HINSTANCE hinst,LPTSTR lpCmdLine,int nCmdShow) {
SHELLEXECUTEINFO sei={sizeof(sei)};
sei.lpFile=_T("Notepad.exe");//sei.lpParameters=_T("param1");
TRACEF("ec=%d\n",MyRunAs(GetModuleHandle(_T("UAC.dll")),sei));
}
#endif
#endif /* FEAT_CUSTOMRUNASDLG */
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