513 lines
12 KiB
C++
513 lines
12 KiB
C++
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// util.cpp: Utility functions
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//
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//////////////////////////////////////////////////////////////////////
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#include <windows.h>
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#include <winbase.h> // for GetCommandLine
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#include "util.h"
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#include <debug.h>
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#include "resource.h"
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// I'm doing my own version of these functions because they weren't in win95.
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// These come from shell\shlwapi\strings.c.
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#ifdef UNIX
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#ifdef BIG_ENDIAN
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#define READNATIVEWORD(x) MAKEWORD(*(char*)(x), *(char*)((char*)(x) + 1))
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#else
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#define READNATIVEWORD(x) MAKEWORD(*(char*)((char*)(x) + 1), *(char*)(x))
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#endif
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#else
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#define READNATIVEWORD(x) (*(UNALIGNED WORD *)x)
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#endif
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/*
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* ChrCmp - Case sensitive character comparison for DBCS
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* Assumes w1, wMatch are characters to be compared
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* Return FALSE if they match, TRUE if no match
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*/
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__inline BOOL ChrCmpA_inline(WORD w1, WORD wMatch)
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{
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/* Most of the time this won't match, so test it first for speed.
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*/
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if (LOBYTE(w1) == LOBYTE(wMatch))
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{
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if (IsDBCSLeadByte(LOBYTE(w1)))
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{
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return(w1 != wMatch);
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}
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return FALSE;
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}
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return TRUE;
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}
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/*
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* StrRChr - Find last occurrence of character in string
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* Assumes lpStart points to start of string
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* lpEnd points to end of string (NOT included in search)
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* wMatch is the character to match
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* returns ptr to the last occurrence of ch in str, NULL if not found.
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*/
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LPSTR StrRChr(LPCSTR lpStart, LPCSTR lpEnd, WORD wMatch)
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{
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LPCSTR lpFound = NULL;
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ASSERT(lpStart);
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ASSERT(!lpEnd || lpEnd <= lpStart + lstrlenA(lpStart));
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if (!lpEnd)
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lpEnd = lpStart + lstrlenA(lpStart);
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for ( ; lpStart < lpEnd; lpStart = AnsiNext(lpStart))
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{
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// (ChrCmp returns FALSE when characters match)
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if (!ChrCmpA_inline(READNATIVEWORD(lpStart), wMatch))
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lpFound = lpStart;
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}
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return ((LPSTR)lpFound);
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}
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/*
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* StrChr - Find first occurrence of character in string
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* Assumes lpStart points to start of null terminated string
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* wMatch is the character to match
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* returns ptr to the first occurrence of ch in str, NULL if not found.
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*/
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LPSTR _StrChrA(LPCSTR lpStart, WORD wMatch, BOOL fMBCS)
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{
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if (fMBCS) {
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for ( ; *lpStart; lpStart = AnsiNext(lpStart))
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{
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if (!ChrCmpA_inline(READNATIVEWORD(lpStart), wMatch))
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return((LPSTR)lpStart);
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}
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} else {
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for ( ; *lpStart; lpStart++)
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{
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if ((BYTE)*lpStart == LOBYTE(wMatch)) {
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return((LPSTR)lpStart);
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}
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}
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}
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return (NULL);
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}
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LPSTR StrChr(LPCSTR lpStart, WORD wMatch)
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{
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CPINFO cpinfo;
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return _StrChrA(lpStart, wMatch, GetCPInfo(CP_ACP, &cpinfo) && cpinfo.LeadByte[0]);
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}
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// LoadStringExW and LoadStringAuto are stolen from shell\ext\mlang\util.cpp
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//
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// Extend LoadString() to to _LoadStringExW() to take LangId parameter
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int LoadStringExW(
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HMODULE hModule,
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UINT wID,
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LPWSTR lpBuffer, // Unicode buffer
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int cchBufferMax, // cch in Unicode buffer
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WORD wLangId)
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{
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HRSRC hResInfo;
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HANDLE hStringSeg;
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LPWSTR lpsz;
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int cch;
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// Make sure the parms are valid.
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if (lpBuffer == NULL || cchBufferMax == 0)
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{
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return 0;
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}
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cch = 0;
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// String Tables are broken up into 16 string segments. Find the segment
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// containing the string we are interested in.
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if (hResInfo = FindResourceExW(hModule, (LPCWSTR)RT_STRING,
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(LPWSTR)IntToPtr(((USHORT)wID >> 4) + 1), wLangId))
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{
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// Load that segment.
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hStringSeg = LoadResource(hModule, hResInfo);
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// Lock the resource.
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if (lpsz = (LPWSTR)LockResource(hStringSeg))
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{
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// Move past the other strings in this segment.
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// (16 strings in a segment -> & 0x0F)
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wID &= 0x0F;
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while (TRUE)
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{
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cch = *((WORD *)lpsz++); // PASCAL like string count
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// first UTCHAR is count if TCHARs
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if (wID-- == 0) break;
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lpsz += cch; // Step to start if next string
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}
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// Account for the NULL
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cchBufferMax--;
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// Don't copy more than the max allowed.
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if (cch > cchBufferMax)
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cch = cchBufferMax-1;
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// Copy the string into the buffer.
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CopyMemory(lpBuffer, lpsz, cch*sizeof(WCHAR));
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// Attach Null terminator.
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lpBuffer[cch] = 0;
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}
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}
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return cch;
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}
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#define LCID_ENGLISH 0x409
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// LoadString from the correct resource
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// try to load in the system default language
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// fall back to english if fail
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int LoadStringAuto(
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HMODULE hModule,
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UINT wID,
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LPSTR lpBuffer,
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int cchBufferMax)
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{
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int iRet = 0;
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LPWSTR lpwStr = (LPWSTR) LocalAlloc(LPTR, cchBufferMax*sizeof(WCHAR));
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if (lpwStr)
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{
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iRet = LoadStringExW(hModule, wID, lpwStr, cchBufferMax, GetSystemDefaultLangID());
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if (!iRet)
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{
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iRet = LoadStringExW(hModule, wID, lpwStr, cchBufferMax, LCID_ENGLISH);
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}
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if (iRet)
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iRet = WideCharToMultiByte(CP_ACP, 0, lpwStr, iRet, lpBuffer, cchBufferMax, NULL, NULL);
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if(iRet >= cchBufferMax)
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iRet = cchBufferMax-1;
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lpBuffer[iRet] = 0;
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LocalFree(lpwStr);
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}
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return iRet;
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}
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#define WS_EX_LAYOUTRTL 0x00400000L // Right to left mirroring
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BOOL Mirror_IsWindowMirroredRTL(HWND hWnd)
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{
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return (GetWindowLongA( hWnd , GWL_EXSTYLE ) & WS_EX_LAYOUTRTL );
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}
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BOOL _PathRemoveFileSpec(LPTSTR psz)
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{
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TCHAR * pszT = StrRChr( psz, psz+lstrlen(psz)-1, TEXT('\\') );
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if (pszT)
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{
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*(pszT+1) = NULL;
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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void PathAppend(LPTSTR pszPath, LPTSTR pMore)
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{
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lstrcpy(pszPath+lstrlen(pszPath), pMore);
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}
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BOOL PathFileExists(LPTSTR pszPath)
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{
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BOOL fResult = FALSE;
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DWORD dwErrMode;
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dwErrMode = SetErrorMode(SEM_FAILCRITICALERRORS);
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fResult = ((UINT)GetFileAttributes(pszPath) != (UINT)-1);
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SetErrorMode(dwErrMode);
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return fResult;
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}
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BOOL _IsNT()
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{
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BOOL fRet = FALSE;
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OSVERSIONINFO osv;
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osv.dwOSVersionInfoSize = sizeof(osv);
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if (GetVersionEx(&osv) &&
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VER_PLATFORM_WIN32_NT == osv.dwPlatformId)
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{
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fRet = TRUE;
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}
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return fRet;
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}
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BOOL _IsNTServer()
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{
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BOOL fRet = FALSE;
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HKEY hKey;
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if (ERROR_SUCCESS == RegOpenKeyEx( HKEY_LOCAL_MACHINE, TEXT("SYSTEM\\CurrentControlSet\\Control\\ProductOptions"), 0, KEY_QUERY_VALUE, &hKey ))
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{
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TCHAR szProductType[80];
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DWORD dwBufLen = sizeof(szProductType);
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if (ERROR_SUCCESS == RegQueryValueEx( hKey, "ProductType", NULL, NULL, (LPBYTE) szProductType, &dwBufLen))
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{
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if (!lstrcmpi("SERVERNT", szProductType) ||
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!lstrcmpi("LANMANNT", szProductType))
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{
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fRet = TRUE;
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}
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}
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RegCloseKey(hKey);
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}
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return fRet;
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}
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BOOL IsCheckableOS()
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{
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BOOL fCheckable = FALSE;
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OSVERSIONINFO osv;
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osv.dwOSVersionInfoSize = sizeof(osv);
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if (GetVersionEx(&osv))
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{
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if (VER_PLATFORM_WIN32_WINDOWS == osv.dwPlatformId) // Win9X
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{
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if (osv.dwMinorVersion > 0) // not Win95
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{
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fCheckable = TRUE;
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}
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}
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else if (VER_PLATFORM_WIN32_NT == osv.dwPlatformId) // WinNT
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{
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if ((osv.dwMajorVersion >= 4) &&
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!_IsNTServer()) // only support NT4 and higher, no server SKUs
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{
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fCheckable = TRUE;
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}
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}
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}
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return fCheckable;
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}
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BOOL
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_IsUserAdmin(
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VOID
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)
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/*++
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Routine Description:
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This routine returns TRUE if the caller's process is a
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member of the Administrators local group.
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Caller is NOT expected to be impersonating anyone and IS
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expected to be able to open their own process and process
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token.
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Arguments:
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None.
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Return Value:
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TRUE - Caller has Administrators local group.
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FALSE - Caller does not have Administrators local group.
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--*/
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{
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HANDLE Token;
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DWORD BytesRequired;
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PTOKEN_GROUPS Groups;
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BOOL b;
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DWORD i;
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SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
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PSID AdministratorsGroup;
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//
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// On non-NT platforms the user is administrator.
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//
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if(!_IsNT()) {
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return(TRUE);
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}
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//
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// Open the process token.
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//
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if(!OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,&Token)) {
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return(FALSE);
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}
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b = FALSE;
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Groups = NULL;
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//
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// Get group information.
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//
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if(!GetTokenInformation(Token,TokenGroups,NULL,0,&BytesRequired)
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&& (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
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&& (Groups = (PTOKEN_GROUPS)LocalAlloc(LPTR,BytesRequired))
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&& GetTokenInformation(Token,TokenGroups,Groups,BytesRequired,&BytesRequired)) {
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b = AllocateAndInitializeSid(
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&NtAuthority,
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2,
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SECURITY_BUILTIN_DOMAIN_RID,
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DOMAIN_ALIAS_RID_ADMINS,
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0, 0, 0, 0, 0, 0,
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&AdministratorsGroup
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);
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if(b) {
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//
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// See if the user has the administrator group.
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//
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b = FALSE;
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for(i=0; i<Groups->GroupCount; i++) {
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if(EqualSid(Groups->Groups[i].Sid,AdministratorsGroup)) {
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b = TRUE;
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break;
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}
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}
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FreeSid(AdministratorsGroup);
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}
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}
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//
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// Clean up and return.
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//
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if(Groups) {
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LocalFree((HLOCAL)Groups);
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}
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CloseHandle(Token);
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return(b);
|
||
|
|
}
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
_DoesUserHavePrivilege(
|
||
|
|
PTSTR PrivilegeName
|
||
|
|
)
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
This routine returns TRUE if the caller's process has
|
||
|
|
the specified privilege. The privilege does not have
|
||
|
|
to be currently enabled. This routine is used to indicate
|
||
|
|
whether the caller has the potential to enable the privilege.
|
||
|
|
|
||
|
|
Caller is NOT expected to be impersonating anyone and IS
|
||
|
|
expected to be able to open their own process and process
|
||
|
|
token.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
Privilege - the name form of privilege ID (such as
|
||
|
|
SE_SECURITY_NAME).
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
TRUE - Caller has the specified privilege.
|
||
|
|
|
||
|
|
FALSE - Caller does not have the specified privilege.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
{
|
||
|
|
HANDLE Token;
|
||
|
|
ULONG BytesRequired;
|
||
|
|
PTOKEN_PRIVILEGES Privileges;
|
||
|
|
BOOL b;
|
||
|
|
DWORD i;
|
||
|
|
LUID Luid;
|
||
|
|
|
||
|
|
//
|
||
|
|
// On non-NT platforms the user has all privileges
|
||
|
|
//
|
||
|
|
if(!_IsNT()) {
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Open the process token.
|
||
|
|
//
|
||
|
|
if(!OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,&Token)) {
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
b = FALSE;
|
||
|
|
Privileges = NULL;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get privilege information.
|
||
|
|
//
|
||
|
|
if(!GetTokenInformation(Token,TokenPrivileges,NULL,0,&BytesRequired)
|
||
|
|
&& (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
|
||
|
|
&& (Privileges = (PTOKEN_PRIVILEGES)LocalAlloc(LPTR,BytesRequired))
|
||
|
|
&& GetTokenInformation(Token,TokenPrivileges,Privileges,BytesRequired,&BytesRequired)
|
||
|
|
&& LookupPrivilegeValue(NULL,PrivilegeName,&Luid)) {
|
||
|
|
|
||
|
|
//
|
||
|
|
// See if we have the requested privilege
|
||
|
|
//
|
||
|
|
for(i=0; i<Privileges->PrivilegeCount; i++) {
|
||
|
|
|
||
|
|
if(!memcmp(&Luid,&Privileges->Privileges[i].Luid,sizeof(LUID))) {
|
||
|
|
|
||
|
|
b = TRUE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Clean up and return.
|
||
|
|
//
|
||
|
|
|
||
|
|
if(Privileges) {
|
||
|
|
LocalFree((HLOCAL)Privileges);
|
||
|
|
}
|
||
|
|
|
||
|
|
CloseHandle(Token);
|
||
|
|
|
||
|
|
return(b);
|
||
|
|
}
|
||
|
|
|
||
|
|
BOOL IsUserRestricted()
|
||
|
|
{
|
||
|
|
return (!_IsUserAdmin() ||
|
||
|
|
!_DoesUserHavePrivilege(SE_SHUTDOWN_NAME) ||
|
||
|
|
!_DoesUserHavePrivilege(SE_BACKUP_NAME) ||
|
||
|
|
!_DoesUserHavePrivilege(SE_RESTORE_NAME) ||
|
||
|
|
!_DoesUserHavePrivilege(SE_SYSTEM_ENVIRONMENT_NAME));
|
||
|
|
}
|