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windows-nt/Source/XPSP1/NT/ds/security/gina/snapins/fde/utils.cxx

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/*++
Microsoft Windows
Copyright (C) Microsoft Corporation, 1981 - 1998
Module Name:
utils.cxx
Abstract:
Author:
Rahul Thombre (RahulTh) 4/8/1998
Revision History:
4/8/1998 RahulTh
Created this module.
--*/
#include "precomp.hxx"
BOOL IsSpecialDescendant (const long nID, UINT* parentID /*= NULL*/)
{
BOOL fRetVal;
int prntID = -1;
switch (nID)
{
case IDS_MYPICS:
prntID = IDS_MYDOCS;
break;
case IDS_PROGRAMS:
prntID = IDS_STARTMENU;
break;
case IDS_STARTUP:
prntID = IDS_PROGRAMS;
break;
default:
prntID = -1;
break;
}
if (fRetVal = (-1 != prntID))
{
if (parentID)
*parentID = prntID;
}
return fRetVal;
}
//this is a helper function for ConvertOldStyleSection(...) which is used
//to convert Beta3 style ini files to Win2K style ini files.
void SplitRHS (CString& szValue, unsigned long & flags, CString& szPath)
{
int index;
//take some precautions
szValue.TrimRight();
szValue.TrimLeft();
szPath.Empty();
flags = 0;
if (szValue.IsEmpty())
return;
//if we are here, szValue at least contains the flags
swscanf ((LPCTSTR)szValue, TEXT("%x"), &flags);
//check if there is a path too.
index = szValue.Find(' '); //we will find a space only if there is a path too.
if (-1 != index) //there is a path too.
{
szPath = szValue.Mid (index + 1);
szPath.TrimLeft();
szPath.TrimRight();
ASSERT (!szPath.IsEmpty());
}
}
//////////////////////////////////////////////////////////////////////////
// Given a full path name, this routine extracts its display name, viz.
// the part of which follows the final \. If there are no \'s in the
// full name, then it sets the display name to the full name
//////////////////////////////////////////////////////////////////////////
void ExtractDisplayName (const CString& szFullname, CString& szDisplayname)
{
CString szName;
szName = szFullname;
//first get rid of any trailing spaces; this might happen in cases
//where one is trying to create a shortcut to a network drive and
//when resolved to a UNC path, it yields a path ending in a slash
//reverse the string so that any trailing slashes will now be at the
//head of the string
szName.MakeReverse();
//get rid of the leading slashes and spaces of the reversed string
szName = szName.Mid ((szName.SpanIncluding(TEXT("\\ "))).GetLength());
//reverse the string again and we will have a string without
//any trailing '\' or ' '
szName.MakeReverse();
//with the trailing '\' and spaces removed, we can go about the
//business of getting the display name
//if \ cannot be found, ReverseFind returns -1 which gives 0 on adding
//1, therefore szDisplayname gets the entire name if no \ is found.
szDisplayname = szName.Mid (szName.ReverseFind('\\') + 1);
}
//+--------------------------------------------------------------------------
//
// Function: SplitProfileString
//
// Synopsis: This function takes in a string of the type key=value and
// extracts the key and the value from it.
//
// Arguments: [in] szPair : the key value pair
// [out] szKey : the key
// [out] szValue : the value
//
// Returns: S_OK : if everything goes well.
// E_FAIL: if the '=' sign cannot be found
//
// History: 9/28/1998 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
HRESULT SplitProfileString (CString szPair, CString& szKey, CString& szValue)
{
int nEqPos;
nEqPos = szPair.Find ('=');
if (-1 == nEqPos)
return E_FAIL;
szKey = szPair.Left(nEqPos);
szKey.TrimLeft();
szKey.TrimRight();
szValue = szPair.Mid (nEqPos + 1);
szValue.TrimLeft();
szValue.TrimRight();
return S_OK;
}
//+--------------------------------------------------------------------------
//
// Function: ConvertOldStyleSection
//
// Synopsis: this function looks at an ini file and if does not have the
// new ini file format, it reads the old redirect section and
// transforms it into the new ini file format which supports
// scaleability
//
// Arguments: [in] szGPTPath : the directory where the ini file resides
// [in] pScope : pointer to the scope pane
//
// Returns: S_OK if it was successful
// an error code if it fails
//
// History: 9/28/1998 RahulTh created
//
// Notes: This function exists primarily for backward compatibility
// with Win2K betas. Might be okay to remove it.
//
//---------------------------------------------------------------------------
HRESULT ConvertOldStyleSection (
const CString& szGPTPath
)
{
AFX_MANAGE_STATE (AfxGetStaticModuleState());
CString szIniFile;
TCHAR* lpszSection;
TCHAR* szEntry;
DWORD cbSize = 1024;
DWORD cbCopied;
CString SectionEntry;
CString Key;
CString Dir;
CString Value;
CString Path;
CString szStartMenu;
CString szPrograms;
CString szStartup;
ULONG flags;
DWORD Status;
BOOL bStatus;
HRESULT hr;
const TCHAR szEveryOne[] = TEXT("s-1-1-0");
//derive the full path of the ini file.
szIniFile.LoadString (IDS_INIFILE);
szIniFile = szGPTPath + '\\' + szIniFile;
//create an empty section
lpszSection = new TCHAR [cbSize];
lpszSection[0] = lpszSection[1] = '\0';
switch (CheckIniFormat (szIniFile))
{
case S_OK:
//this section has already been converted
goto ConOldStlSec_CleanupAndQuit;
case S_FALSE:
break; //has the Redirect section but not the FolderStatus
//section, so there is processing to do.
case REGDB_E_KEYMISSING:
//this means that the function has neither the FolderStatus section
//nor the Redirect section, so we just create an empty FolderStatus
//section to make processing simpler in future.
//ignore any errors here because they don't really cause any harm
//however, make sure that the file is pre-created in unicode so that
//the WritePrivateProfile* functions don't puke in ANSI
PrecreateUnicodeIniFile ((LPCTSTR)szIniFile);
WritePrivateProfileSection (TEXT("FolderStatus"),
lpszSection,
(LPCTSTR) szIniFile);
hr = S_OK;
goto ConOldStlSec_CleanupAndQuit;
}
//this means that we need to convert the section ourselves
//first load the redirect section
do
{
cbCopied = GetPrivateProfileSection (TEXT("Redirect"),
lpszSection,
cbSize,
(LPCTSTR) szIniFile
);
if (cbSize - 2 == cbCopied)
{
delete [] lpszSection;
cbSize *= 2;
lpszSection = new TCHAR [cbSize];
continue;
}
//the section has been successfully loaded if we are here.
break;
} while (TRUE);
//start the conversion process:
for (szEntry = lpszSection; *szEntry; szEntry += (lstrlen(szEntry) + 1))
{
SectionEntry = szEntry;
if (FAILED(hr = SplitProfileString (SectionEntry, Key, Value)))
goto ConOldStlSec_CleanupAndQuit;
SplitRHS (Value, flags, Path);
Path.TrimLeft();
Path.TrimRight();
if (Path.IsEmpty())
Path = TEXT("%USERPROFILE%") + ('\\' + Key); //we used the relative paths for keys in the old style section
ExtractDisplayName (Key, Dir);
//set the new flags or modify the existing flags to reflect new behavior
szStartMenu.LoadString (IDS_STARTMENU);
szPrograms.LoadString (IDS_PROGRAMS);
szStartup.LoadString (IDS_STARTUP);
if (Dir.CompareNoCase (szStartMenu) && //it is not the start menu and
Dir.CompareNoCase (szPrograms) && //it is not programs and
Dir.CompareNoCase (szStartup)) //it is not the startup folder
{
flags |= REDIR_SETACLS; //apply acls. this was the default behavior earlier, but not any more
}
else //it is one of start menu/programs/startup
{
//move contents is not allowed for start menu and its descendants
flags &= ~REDIR_MOVE_CONTENTS;
}
if ((flags & REDIR_DONT_CARE) && (flags & REDIR_FOLLOW_PARENT))
{
//if both flags were present, this implies they are linked together
//in the new format, in order to express this, only follow_parent
//is required
flags &= ~REDIR_DONT_CARE;
}
Value.Format (TEXT("%x"), flags);
bStatus = WritePrivateProfileString (TEXT("FolderStatus"),
Dir,
Value,
(LPCTSTR)szIniFile
);
if (bStatus && (!(flags & REDIR_DONT_CARE)) && (!(flags & REDIR_FOLLOW_PARENT)))
bStatus = WritePrivateProfileString ((LPCTSTR) Dir,
szEveryOne,
(LPCTSTR) Path,
(LPCTSTR) szIniFile
);
if (!bStatus)
{
Status = GetLastError();
hr = HRESULT_FROM_WIN32 (Status);
goto ConOldStlSec_CleanupAndQuit;
}
}
ConOldStlSec_CleanupAndQuit:
delete [] lpszSection;
return hr;
}
//+--------------------------------------------------------------------------
//
// Function: GetFolderIndex
//
// Synopsis: given the name of a folder, this function returns its index
// in the array of CFileInfo objects in the scope pane
//
// Arguments: [in] szName : name of the folder
//
// Returns: the index of the folder or -1 if the name is invalid
//
// History: 9/28/1998 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
LONG GetFolderIndex (const CString& szName)
{
LONG i;
CString szBuiltinFolder;
for (i = IDS_DIRS_START; i < IDS_DIRS_END; i++)
{
szBuiltinFolder.LoadString (i);
if (szName.CompareNoCase((LPCTSTR)szBuiltinFolder))
break;
}
return GETINDEX (i);
}
//+--------------------------------------------------------------------------
//
// Function: CheckIniFormat
//
// Synopsis: this function examines the sections of an ini file to see
// if it supports the new ini file format (that allows for
// scaleability)
//
// Arguments: [in] szIniFile : the full path of the ini file
//
// Returns: S_OK : if it finds the FolderStatus section
// S_FALSE : if it does not find the FolderStatus section but
// finds the Redirect section
// REGDB_E_KEYMISSING : if it finds neither the FolderStatus
// section nor the Redirect section
//
// History: 9/28/1998 RahulTh created
//
// Notes: this function exists for backward compatibility with Win2K
// Betas. Might be okay to get rid of this eventually.
//
//---------------------------------------------------------------------------
HRESULT CheckIniFormat (LPCTSTR szIniFile)
{
DWORD cbSize = 1024;
DWORD cbCopied;
TCHAR* lpszNames;
TCHAR* szSectionName;
BOOL fHasFolderStatus = FALSE;
BOOL fHasRedirect = FALSE;
do
{
lpszNames = new TCHAR [cbSize];
if (! lpszNames)
return E_OUTOFMEMORY;
*lpszNames = L'\0';
cbCopied = GetPrivateProfileSectionNames (lpszNames, cbSize, szIniFile);
if (cbSize - 2 == cbCopied) //the buffer was not enough.
{
delete [] lpszNames;
cbSize *= 2; //increase the buffer size
continue;
}
break; //if we are here, we are done.
} while (TRUE);
for (szSectionName = lpszNames;
*szSectionName;
szSectionName += (lstrlen(szSectionName) + 1))
{
if (0 == lstrcmpi(TEXT("FolderStatus"), szSectionName))
{
fHasFolderStatus = TRUE;
continue;
}
if (0 == lstrcmpi (TEXT("Redirect"), szSectionName))
{
fHasRedirect = TRUE;
continue;
}
}
//cleanup dynamically allocated memory before quitting
delete [] lpszNames;
if (fHasFolderStatus)
return S_OK;
//if we are here, the file does not have the FolderStatus section
if (fHasRedirect)
return S_FALSE;
//if we are here, then the file has neither the folder status section
//nor the Redirect section
return REGDB_E_KEYMISSING;
}
//+--------------------------------------------------------------------------
//
// Function: GetIntfromUnicodeString
//
// Synopsis: converts a unicode string into an integer
//
// Arguments: [in] szNum : the number represented as a unicode string
// [in] Base : the base in which the resultant int is desired
// [out] pValue : pointer to the integer representation of the
// number
//
// Returns: STATUS_SUCCESS if successful.
// or some other error code
//
// History: 9/29/1998 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
NTSTATUS GetIntFromUnicodeString (const WCHAR* szNum, ULONG Base, PULONG pValue)
{
CString StrNum;
UNICODE_STRING StringW;
size_t len;
NTSTATUS Status;
StrNum = szNum;
len = StrNum.GetLength();
StringW.Length = len * sizeof(WCHAR);
StringW.MaximumLength = sizeof(WCHAR) * (len + 1);
StringW.Buffer = StrNum.GetBuffer(len);
Status = RtlUnicodeStringToInteger (&StringW, Base, pValue);
return Status;
}
//+--------------------------------------------------------------------------
//
// Function: GetUNCPath
//
// Synopsis: this function tries to retrieve the UNC path of an item
// given its PIDL
//
// Arguments: [in] lpszPath : the full path to the selected file.
// [out] szUNC : the UNC path of the item
//
// Returns: NO_ERROR if the conversion was successful.
// other error codes if not...
//
// History: 10/1/1998 RahulTh created
// 4/12/1999 RahulTh added error code. changed params.
// (item id list is no longer passed in)
//
// Notes: if this function is unsuccessful, then szUNC will contain an
// empty string
//
//---------------------------------------------------------------------------
DWORD GetUNCPath (LPCTSTR lpszPath, CString& szUNC)
{
TCHAR* lpszUNCName;
UNIVERSAL_NAME_INFO* pUNCInfo;
DWORD lBufferSize;
DWORD retVal = NO_ERROR;
szUNC.Empty(); //precautionary measures
//we have a path, now we shall try to get a UNC path
lpszUNCName = new TCHAR[MAX_PATH];
pUNCInfo = (UNIVERSAL_NAME_INFO*)lpszUNCName;
lBufferSize = MAX_PATH * sizeof(TCHAR);
retVal = WNetGetUniversalName (lpszPath,
UNIVERSAL_NAME_INFO_LEVEL,
(LPVOID)pUNCInfo,
&lBufferSize);
if (ERROR_MORE_DATA == retVal) //MAX_PATH was insufficient to hold the UNC path
{
delete [] lpszUNCName;
lpszUNCName = new TCHAR[lBufferSize/(sizeof(TCHAR)) + 1];
pUNCInfo = (UNIVERSAL_NAME_INFO*)lpszUNCName;
retVal = WNetGetUniversalName (lpszPath,
UNIVERSAL_NAME_INFO_LEVEL,
(LPVOID)pUNCInfo,
&lBufferSize);
}
//at this point we may or may not have a UNC path.
//if we do, we return that, or we return whatever we already have
if (NO_ERROR == retVal)
szUNC = pUNCInfo->lpUniversalName;
delete [] lpszUNCName;
return retVal;
}
//+--------------------------------------------------------------------------
//
// Function: BrowseCallbackProc
//
// Synopsis: the callback function for SHBrowseForFolder
//
// Arguments: see Platform SDK
//
// Returns: see Platform SDK
//
// History: 4/9/1999 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg,
LPARAM lParam, LPARAM lpData
)
{
CString * pszData;
CString szStart;
int index;
LPITEMIDLIST lpidl = NULL;
TCHAR lpszPath [MAX_PATH];
pszData = (CString *) lpData;
switch (uMsg)
{
case BFFM_INITIALIZED:
if (pszData)
{
szStart = *pszData;
szStart.TrimRight();
szStart.TrimLeft();
if (! szStart.IsEmpty())
{
index = szStart.ReverseFind (L'\\');
if (-1 != index && index > 1)
szStart = szStart.Left (index);
SendMessage (hwnd, BFFM_SETSELECTION, TRUE,
(LPARAM)(LPCTSTR)szStart);
}
}
break;
case BFFM_SELCHANGED:
//we need to check if we can get the full path to the selected folder.
//e.g. if the full path exceeds MAX_PATH, we cannot obtain the path
//from the item id list. if we cannot get the path, we should not
//enable the OK button. So, over here, as a precaution, we first
//disable the OK button. We will enable it only after we get the path.
SendMessage (hwnd, BFFM_ENABLEOK, FALSE, FALSE);
if (SHGetPathFromIDList((LPCITEMIDLIST)lParam, lpszPath))
{
//set the path into the data member and enable the OK button
if (lpData)
{
SendMessage (hwnd, BFFM_ENABLEOK, TRUE, TRUE);
*((CString *) lpData) = lpszPath;
}
}
break;
default:
break;
}
return 0;
}
//+--------------------------------------------------------------------------
//
// Function: PrecreateUnicodeIniFile
//
// Synopsis: The WritePrivateProfile* functions do not write in unicode
// unless the file already exists in unicode format. Therefore,
// this function is used to precreate a unicode file so that
// the WritePrivateProfile* functions can preserve the unicodeness.
//
// Arguments: [in] lpszFilePath : the full path of the ini file.
//
// Returns: ERROR_SUCCESS if successful.
// an error code otherwise.
//
// History: 7/9/1999 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
DWORD PrecreateUnicodeIniFile (LPCTSTR lpszFilePath)
{
HANDLE hFile;
WIN32_FILE_ATTRIBUTE_DATA fad;
DWORD Status = ERROR_ALREADY_EXISTS;
DWORD dwWritten;
if (!GetFileAttributesEx (lpszFilePath, GetFileExInfoStandard, &fad))
{
if (ERROR_FILE_NOT_FOUND == (Status = GetLastError()))
{
hFile = CreateFile(lpszFilePath, GENERIC_WRITE, 0, NULL,
CREATE_NEW, FILE_ATTRIBUTE_HIDDEN, NULL);
if (hFile != INVALID_HANDLE_VALUE)
{
//add the unicode marker to the beginning of the file
//so that APIs know for sure that it is a unicode file.
WriteFile(hFile, L"\xfeff\r\n", 3 * sizeof(WCHAR),
&dwWritten, NULL);
//add some unicode characters to the file.
WriteFile(hFile, L" \r\n", 7 * sizeof(WCHAR),
&dwWritten, NULL);
CloseHandle(hFile);
Status = ERROR_SUCCESS;
}
else
{
Status = GetLastError();
}
}
}
return Status;
}
//+--------------------------------------------------------------------------
//
// Function: IsValidPrefix
//
// Synopsis: Given a path, this function determines if it is a valid prefix
//
// Arguments: [in] pathType : the type of the path
// [in] pwszPath : the supplied path
//
// Returns: TRUE: if the prefix is valid.
// FALSE: otherwise
//
// History: 3/14/2000 RahulTh created
//
// Notes: A valid prefix is either a non-unc path or a UNC path which
// has at least the server and the share component. It must also
// be a non-empty path.
//
//---------------------------------------------------------------------------
BOOL IsValidPrefix (UINT pathType, LPCTSTR pwszPath)
{
CString szPath;
const WCHAR * pwszProcessedPath;
if (! pwszPath || L'\0' == *pwszPath)
return FALSE;
szPath = pwszPath;
szPath.TrimLeft();
szPath.TrimRight();
szPath.TrimRight(L'\\');
pwszProcessedPath = (LPCTSTR) szPath;
if (PathIsUNC ((LPCTSTR) szPath))
{
// Make sure it has both the server and the share component
if (lstrlen (pwszProcessedPath) <= 2 ||
L'\\' != pwszProcessedPath[0] ||
L'\\' != pwszProcessedPath[1] ||
NULL == wcschr (&pwszProcessedPath[2], L'\\'))
{
return FALSE;
}
}
//
// If we are here, we just need to make sure that the path does not contain
// any environment variables -- if it is not IDS_SPECIFIC_PATH
//
if (pathType != IDS_SPECIFIC_PATH &&
NULL != wcschr(pwszProcessedPath, L'%'))
{
return FALSE;
}
// If we make it up to here, then the path is a valid prefix.
return TRUE;
}
//+--------------------------------------------------------------------------
//
// Function: AlwaysShowMyPicsNode
//
// Synopsis: In WindowsXP, we now show the MyPics node in the scope pane
// only if My Pics does not follow My Docs. However, if required
// this MyPics can always be made visible by setting a reg. value
// under HKLM\Software\Policies\Microsoft\Windows\System called
// FRAlwaysShowMyPicsNode. This is a DWORD value and if set to
// non-zero, the MyPics node will always be displayed.
//
// Arguments: none.
//
// Returns: TRUE : if the value was found in the registry and was non-zero.
// FALSE : otherwise.
//
// History: 4/10/2001 RahulTh created
//
// Notes: Note: In case of errors, the default value of FALSE is returned.
//
//---------------------------------------------------------------------------
BOOL AlwaysShowMyPicsNode (void)
{
BOOL bAlwaysShowMyPics = FALSE;
DWORD dwValue = 0;
DWORD dwType = REG_DWORD;
DWORD dwSize = sizeof(DWORD);
HKEY hKey = NULL;
if (ERROR_SUCCESS != RegOpenKey (HKEY_LOCAL_MACHINE,
TEXT("Software\\Policies\\Microsoft\\Windows\\System"),
&hKey)
)
{
return bAlwaysShowMyPics;
}
if (ERROR_SUCCESS == RegQueryValueEx (hKey,
TEXT("FRAlwaysShowMyPicsNode"),
NULL,
&dwType,
(LPBYTE)(&dwValue),
&dwSize)
)
{
if (REG_DWORD == dwType && dwValue)
bAlwaysShowMyPics = TRUE;
}
RegCloseKey(hKey);
return bAlwaysShowMyPics;
}
//+--------------------------------------------------------------------------
//
// Function: CreateThemedPropertyPage
//
// Synopsis: Helper function to make sure that property pages put up
// by the snap-in are themed.
//
// Arguments:
//
// Returns:
//
// History: 4/20/2001 RahulTh created
//
// Notes:
//
//---------------------------------------------------------------------------
HPROPSHEETPAGE CreateThemedPropertySheetPage(AFX_OLDPROPSHEETPAGE* psp)
{
PROPSHEETPAGE_V3 sp_v3 = {0};
CopyMemory (&sp_v3, psp, psp->dwSize);
sp_v3.dwSize = sizeof(sp_v3);
return (::CreatePropertySheetPage (&sp_v3));
}
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