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1007 lines
33 KiB
1007 lines
33 KiB
//*************************************************************
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//
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// HKCR management routines
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//
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// hkcr.c
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//
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// Microsoft Confidential
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// Copyright (c) Microsoft Corporation 1997
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// All rights reserved
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//
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//*************************************************************
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/*++
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Abstract:
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This module contains the code executed at logon for
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creating a user classes hive and mapping it into the standard
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user hive. The user classes hive and its machine classes
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counterpart make up the registry subtree known as
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HKEY_CLASSES_ROOT.
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Author:
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Zeke Odins-Lucas (zekel) 18-Oct-2000
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changed from hkcr.c to hive.cpp
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Adam P. Edwards (adamed) 10-Oct-1997
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Gregory Jensenworth (gregjen) 1-Jul-1997
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Key Functions:
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LoadUserHives
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UnloadUserHives
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Notes:
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Starting with NT5, the HKEY_CLASSES_ROOT key is per-user
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instead of per-machine -- previously, HKCR was an alias for
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HKLM\Software\Classes.
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The per-user HKCR combines machine classes stored it the
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traditional HKLM\Software\Classes location with classes
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stored in HKCU\Software\Classes.
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Certain keys, such as CLSID, will have subkeys that come
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from both the machine and user locations. When there is a conflict
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in key names, the user oriented key overrides the other one --
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only the user key is seen in that case.
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Originally, the code in this module was responsible for
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creating this combined view. That responsibility has moved
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to the win32 registry api's, so the main responsibility of
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this module is the mapping of the user-specific classes into
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the registry.
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It should be noted that HKCU\Software\Classes is not the true
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location of the user-only class data. If it were, all the class
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data would be in ntuser.dat, which roams with the user. Since
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class data can get very large, installation of a few apps
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would cause HKCU (ntuser.dat) to grow from a few hundred thousand K
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to several megabytes. Since user-only class data comes from
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the directory, it does not need to roam and therefore it was
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separated from HKCU (ntuser.dat) and stored in another hive
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mounted under HKEY_USERS.
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It is still desirable to allow access to this hive through
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HKCU\Software\Classes, so we use some trickery (symlinks) to
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make it seem as if the user class data exists there.
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--*/
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#include "uenv.h"
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#include <malloc.h>
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#define USER_CLASSES_HIVE_NAME TEXT("\\UsrClass.dat")
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#define CLASSES_SUBTREE TEXT("Software\\Classes\\")
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#define TEMPHIVE_FILENAME TEXT("TempClassesHive.dat")
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#define CLASSES_CLSID_SUBTREE TEXT("Software\\Classes\\Clsid\\")
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#define EXPLORER_CLASSES_SUBTREE TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Clsid\\")
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#define LENGTH(x) (sizeof(x) - sizeof(WCHAR))
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#define INIT_SPECIALKEY(x) x
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typedef WCHAR* SpecialKey;
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SpecialKey SpecialSubtrees[]= {
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INIT_SPECIALKEY(L"*"),
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INIT_SPECIALKEY(L"*\\shellex"),
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INIT_SPECIALKEY(L"*\\shellex\\ContextMenuHandlers"),
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INIT_SPECIALKEY(L"*\\shellex\\PropertyShellHandlers"),
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INIT_SPECIALKEY(L"AppID"),
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INIT_SPECIALKEY(L"ClsID"),
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INIT_SPECIALKEY(L"Component Categories"),
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INIT_SPECIALKEY(L"Drive"),
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INIT_SPECIALKEY(L"Drive\\shellex"),
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INIT_SPECIALKEY(L"Drive\\shellex\\ContextMenuHandlers"),
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INIT_SPECIALKEY(L"Drive\\shellex\\PropertyShellHandlers"),
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INIT_SPECIALKEY(L"FileType"),
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INIT_SPECIALKEY(L"Folder"),
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INIT_SPECIALKEY(L"Folder\\shellex"),
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INIT_SPECIALKEY(L"Folder\\shellex\\ColumnHandler"),
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INIT_SPECIALKEY(L"Folder\\shellex\\ContextMenuHandlers"),
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INIT_SPECIALKEY(L"Folder\\shellex\\ExtShellFolderViews"),
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INIT_SPECIALKEY(L"Folder\\shellex\\PropertySheetHandlers"),
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INIT_SPECIALKEY(L"Installer\\Components"),
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INIT_SPECIALKEY(L"Installer\\Features"),
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INIT_SPECIALKEY(L"Installer\\Products"),
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INIT_SPECIALKEY(L"Interface"),
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INIT_SPECIALKEY(L"Mime"),
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INIT_SPECIALKEY(L"Mime\\Database"),
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INIT_SPECIALKEY(L"Mime\\Database\\Charset"),
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INIT_SPECIALKEY(L"Mime\\Database\\Codepage"),
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INIT_SPECIALKEY(L"Mime\\Database\\Content Type"),
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INIT_SPECIALKEY(L"Typelib")
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};
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#define NUM_SPECIAL_SUBTREES (sizeof(SpecialSubtrees)/sizeof(*SpecialSubtrees))
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//*************************************************************
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//
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// MoveUserClassesBeforeMerge
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//
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// Purpose: move HKCU\Software\Classes before
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// MapUserClassesIntoUserHive() deletes it.
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//
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// Parameters: lpProfile - Profile information
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// lpcszLocalHiveDir - Temp Hive location
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//
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// Return: ERROR_SUCCESS if successful,
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// other error if not
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//
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// Comments:
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//
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// History: Date Author Comment
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// 5/6/99 vtan Created
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//
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//*************************************************************
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LONG MoveUserClassesBeforeMerge(
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LPPROFILE lpProfile,
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LPCTSTR lpcszLocalHiveDir)
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{
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LONG res;
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HKEY hKeySource;
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// Open HKCU\Software\Classes and see if there is a subkey.
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// No subkeys would indicate that the move has already been
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// done or there is no data to move.
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res = RegOpenKeyEx(lpProfile->hKeyCurrentUser, CLASSES_CLSID_SUBTREE, 0, KEY_ALL_ACCESS, &hKeySource);
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if (ERROR_SUCCESS == res)
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{
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DWORD dwSubKeyCount;
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if ((ERROR_SUCCESS == RegQueryInfoKey(hKeySource, NULL, NULL, NULL, &dwSubKeyCount, NULL, NULL, NULL, NULL, NULL, NULL, NULL)) &&
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(dwSubKeyCount > 0))
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{
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LPTSTR pszLocalTempHive;
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// Allocate enough space for the local hive directory and the temp hive filename.
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pszLocalTempHive = (LPTSTR) alloca((lstrlen(lpcszLocalHiveDir) * sizeof(TCHAR)) +
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sizeof(TEMPHIVE_FILENAME) +
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(sizeof('\0') * sizeof(TCHAR)));
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// Get a path to a file to save HKCU\Software\Classes into.
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if (pszLocalTempHive != NULL)
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{
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HANDLE hToken = NULL;
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BOOL bAdjustPriv = FALSE;
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lstrcpy(pszLocalTempHive, lpcszLocalHiveDir);
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lstrcat(pszLocalTempHive, TEMPHIVE_FILENAME);
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// RegSaveKey() fails if the file exists so delete it first.
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DeleteFile(pszLocalTempHive);
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//
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// Check to see if we are impersonating.
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//
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if(!OpenThreadToken(GetCurrentThread(), TOKEN_READ, TRUE, &hToken) || hToken == NULL) {
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bAdjustPriv = TRUE;
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}
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else {
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CloseHandle(hToken);
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}
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if(!bAdjustPriv) {
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DWORD dwDisposition;
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HKEY hKeyTarget;
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BOOL fSavedHive;
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// Save HKCU\Software\Classes into the temp hive
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// and restore the state of SE_BACKUP_NAME privilege
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res = RegSaveKey(hKeySource, pszLocalTempHive, NULL);
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if (ERROR_SUCCESS == res)
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{
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res = RegCreateKeyEx(lpProfile->hKeyCurrentUser, EXPLORER_CLASSES_SUBTREE, 0, TEXT(""), REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKeyTarget, &dwDisposition);
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if (ERROR_SUCCESS == res)
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{
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// Restore temp hive to a new location at
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// HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
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// This performs the upgrade from NT4 to NT5.
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res = RegRestoreKey(hKeyTarget, pszLocalTempHive, 0);
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if (ERROR_SUCCESS != res)
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{
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DebugMsg((DM_WARNING, TEXT("RegRestoreKey failed with error %d"), res));
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}
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RegCloseKey(hKeyTarget);
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("RegCreateKeyEx failed to create key %s with error %d"), EXPLORER_CLASSES_SUBTREE, res));
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}
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("RegSaveKey failed with error %d"), res));
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}
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}
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else {
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if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
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{
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DWORD dwReturnTokenPrivilegesSize;
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TOKEN_PRIVILEGES oldTokenPrivileges, newTokenPrivileges;
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// Enable SE_BACKUP_NAME privilege
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if (LookupPrivilegeValue(NULL, SE_BACKUP_NAME, &newTokenPrivileges.Privileges[0].Luid))
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{
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newTokenPrivileges.PrivilegeCount = 1;
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newTokenPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
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if (AdjustTokenPrivileges(hToken, FALSE, &newTokenPrivileges, sizeof(newTokenPrivileges), &oldTokenPrivileges, &dwReturnTokenPrivilegesSize))
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{
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BOOL fSavedHive;
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// Save HKCU\Software\Classes into the temp hive
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// and restore the state of SE_BACKUP_NAME privilege
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res = RegSaveKey(hKeySource, pszLocalTempHive, NULL);
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if (!AdjustTokenPrivileges(hToken, FALSE, &oldTokenPrivileges, 0, NULL, NULL))
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{
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DebugMsg((DM_WARNING, TEXT("AdjustTokenPrivileges failed to restore old privileges with error %d"), GetLastError()));
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}
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if (ERROR_SUCCESS == res)
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{
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// Enable SE_RESTORE_NAME privilege.
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if (LookupPrivilegeValue(NULL, SE_RESTORE_NAME, &newTokenPrivileges.Privileges[0].Luid))
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{
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newTokenPrivileges.PrivilegeCount = 1;
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newTokenPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
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if (AdjustTokenPrivileges(hToken, FALSE, &newTokenPrivileges, sizeof(newTokenPrivileges), &oldTokenPrivileges, &dwReturnTokenPrivilegesSize))
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{
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DWORD dwDisposition;
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HKEY hKeyTarget;
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res = RegCreateKeyEx(lpProfile->hKeyCurrentUser, EXPLORER_CLASSES_SUBTREE, 0, TEXT(""), REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKeyTarget, &dwDisposition);
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if (ERROR_SUCCESS == res)
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{
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// Restore temp hive to a new location at
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// HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer
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// This performs the upgrade from NT4 to NT5.
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res = RegRestoreKey(hKeyTarget, pszLocalTempHive, 0);
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if (ERROR_SUCCESS != res)
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{
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DebugMsg((DM_WARNING, TEXT("RegRestoreKey failed with error %d"), res));
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}
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RegCloseKey(hKeyTarget);
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("RegCreateKeyEx failed to create key %s with error %d"), EXPLORER_CLASSES_SUBTREE, res));
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}
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if (!AdjustTokenPrivileges(hToken, FALSE, &oldTokenPrivileges, 0, NULL, NULL))
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{
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DebugMsg((DM_WARNING, TEXT("AdjustTokenPrivileges failed to restore old privileges with error %d"), GetLastError()));
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}
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}
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else
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{
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res = GetLastError();
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DebugMsg((DM_WARNING, TEXT("AdjustTokenPrivileges failed with error %d"), res));
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}
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}
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else
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{
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res = GetLastError();
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DebugMsg((DM_WARNING, TEXT("LookupPrivilegeValue failed with error %d"), res));
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}
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("RegSaveKey failed with error %d"), res));
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}
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}
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else
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{
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res = GetLastError();
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DebugMsg((DM_WARNING, TEXT("AdjustTokenPrivileges failed with error %d"), res));
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}
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}
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else
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{
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res = GetLastError();
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DebugMsg((DM_WARNING, TEXT("LookupPrivilegeValue failed with error %d"), res));
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}
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CloseHandle(hToken);
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}
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else
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{
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res = GetLastError();
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DebugMsg((DM_WARNING, TEXT("OpenProcessToken failed to get token with error %d"), res));
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}
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} // if(!bAdjustPriv) else
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// Delete local temporary hive file.
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DeleteFile(pszLocalTempHive);
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("alloca failed to allocate temp hive path buffer")));
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}
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}
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RegCloseKey(hKeySource);
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}
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else if (ERROR_FILE_NOT_FOUND == res)
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{
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res = ERROR_SUCCESS;
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}
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return res;
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}
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//*************************************************************
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//
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// CreateRegLink()
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//
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// Purpose: Create a link from the hkDest + SubKeyName
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// pointing to lpSourceRootName
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//
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// if the key (link) already exists, do nothing
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//
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// Parameters: hkDest - root of destination
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// SubKeyName - subkey of destination
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// lpSourceName - target of link
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//
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// Return: ERROR_SUCCESS if successful
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// other NTSTATUS if an error occurs
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//
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//*************************************************************/
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LONG CreateRegLink(HKEY hkDest,
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LPCTSTR SubKeyName,
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LPCTSTR lpSourceName)
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{
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NTSTATUS Status;
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UNICODE_STRING LinkTarget;
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UNICODE_STRING SubKey;
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OBJECT_ATTRIBUTES Attributes;
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HANDLE hkInternal;
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UNICODE_STRING SymbolicLinkValueName;
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//
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// Initialize special key value used to make symbolic links
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//
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RtlInitUnicodeString(&SymbolicLinkValueName, L"SymbolicLinkValue");
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//
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// Initialize unicode string for our in params
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//
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RtlInitUnicodeString(&LinkTarget, lpSourceName);
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RtlInitUnicodeString(&SubKey, SubKeyName);
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//
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// See if this link already exists -- this is necessary because
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// NtCreateKey fails with STATUS_OBJECT_NAME_COLLISION if a link
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// already exists and will not return a handle to the existing
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// link.
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//
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InitializeObjectAttributes(&Attributes,
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&SubKey,
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OBJ_CASE_INSENSITIVE | OBJ_OPENLINK,
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hkDest,
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NULL);
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//
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// If this call succeeds, we get a handle to the existing link
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//
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Status = NtOpenKey( &hkInternal,
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MAXIMUM_ALLOWED,
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&Attributes );
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if (STATUS_OBJECT_NAME_NOT_FOUND == Status) {
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//
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// There is no existing link, so use NtCreateKey to make a new one
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//
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Status = NtCreateKey( &hkInternal,
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KEY_CREATE_LINK | KEY_SET_VALUE,
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&Attributes,
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0,
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NULL,
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REG_OPTION_VOLATILE | REG_OPTION_CREATE_LINK,
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NULL);
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}
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//
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// Whether the link existed already or not, we should still set
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// the value which determines the link target
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//
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if (NT_SUCCESS(Status)) {
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Status = NtSetValueKey( hkInternal,
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&SymbolicLinkValueName,
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0,
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REG_LINK,
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LinkTarget.Buffer,
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LinkTarget.Length);
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NtClose(hkInternal);
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}
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return RtlNtStatusToDosError(Status);
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}
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//*************************************************************
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//
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// DeleteRegLink()
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//
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// Purpose: Deletes a registry key (or link) without
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// using the advapi32 registry apis
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//
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//
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// Parameters: hkRoot - parent key
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// lpSubKey - subkey to delete
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//
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// Return: ERROR_SUCCESS if successful
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// other error if not
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//
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// Comments:
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//
|
|
// History: Date Author Comment
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|
// 3/6/98 adamed Created
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//
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//*************************************************************
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|
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LONG DeleteRegLink(HKEY hkRoot, LPCTSTR lpSubKey)
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{
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OBJECT_ATTRIBUTES Attributes;
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HANDLE hKey;
|
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NTSTATUS Status;
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UNICODE_STRING Subtree;
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|
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//
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// Initialize string for lpSubKey param
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//
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RtlInitUnicodeString(&Subtree, lpSubKey);
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|
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InitializeObjectAttributes(&Attributes,
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&Subtree,
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OBJ_CASE_INSENSITIVE | OBJ_OPENLINK,
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hkRoot,
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NULL);
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|
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//
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// Open the link
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//
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Status = NtOpenKey( &hKey,
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MAXIMUM_ALLOWED,
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&Attributes );
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//
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// If we succeeded in opening it, delete it
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//
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if (NT_SUCCESS(Status)) {
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Status = NtDeleteKey(hKey);
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NtClose(hKey);
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}
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return RtlNtStatusToDosError(Status);
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}
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|
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#define HIVEENTRY(h, i, f, l, t) {h, i, f, l, t}
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|
// table of hives to load
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|
typedef struct
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{
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LPCTSTR pszHive;
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int csidl;
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LPCTSTR pszFile;
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LPCTSTR pszLink;
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LPCTSTR pszTargetSubkey;
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} USERHIVE;
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|
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static USERHIVE s_hives[] =
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{
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HIVEENTRY(
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USER_CLASSES_HIVE_SUFFIX,
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CSIDL_LOCAL_APPDATA,
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USER_CLASSES_HIVE_NAME,
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CLASSES_SUBTREE,
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NULL),
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|
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HIVEENTRY(
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TEXT("_Windows_Local"),
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CSIDL_LOCAL_APPDATA,
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TEXT("UserWin.dat"),
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TEXT("Software\\Microsoft\\Windows\\ShellNoRoam\\"),
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TEXT("\\ShellNoRoam")),
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|
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HIVEENTRY(
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TEXT("_Windows"),
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CSIDL_APPDATA,
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TEXT("UserWin.dat"),
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TEXT("Software\\Microsoft\\Windows\\Shell\\"),
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TEXT("\\Shell")),
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};
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|
|
|
#define CCH_TARGETHIVE MAX_PATH - (sizeof(USER_KEY_PREFIX) / sizeof(TCHAR)) + 1
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|
|
|
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class CUserHives
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{
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public:
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CUserHives() : _pszFile(0) {}
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~CUserHives();
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LONG LoadHives(LPPROFILE pProfile, LPTSTR pszSid);
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BOOL UnloadHives(LPCTSTR pszSid);
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protected: // methods
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BOOL _Init(USERPROFILE *pProfile, LPCTSTR pszSid);
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LONG _LoadHive(USERHIVE *phive);
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BOOL _UnloadHive(LPCTSTR pszHive);
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BOOL _CreateHiveFolder(USERHIVE *phive);
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BOOL _MakeTargetHive(LPCTSTR pszHive);
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LONG _CreateUserHive(USERHIVE *phive);
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LONG _PreLoadKey(BOOL fNewHive, LPCTSTR pszSub);
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LONG _CreateHiveFile(HKEY hk);
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LONG _PostLoadKey(BOOL fNewHive);
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LONG _CreateLink(USERHIVE *phive);
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LONG _DeleteLink(HKEY hk, LPCTSTR pszLink);
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protected: // members
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USERPROFILE *_pup;
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LPCTSTR _sid;
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LPTSTR _pszFile; // MAX_PATH;
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LPTSTR _pszTargetObject;
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LPTSTR _pszTargetHive; // points inside of _pszTargetObject;
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};
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BOOL _StrCatSafe(LPTSTR pszDest, LPCTSTR pszSrc, int cchDestBuffSize)
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{
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LPWSTR psz = pszDest;
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// we walk forward till we find the end of pszDest, subtracting
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// from cchDestBuffSize as we go.
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while (*psz)
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{
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psz++;
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cchDestBuffSize--;
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}
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if (cchDestBuffSize > 0)
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{
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lstrcpyn(psz, pszSrc, cchDestBuffSize);
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return TRUE;
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}
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return FALSE;
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}
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LONG CUserHives::_DeleteLink(HKEY hk, LPCTSTR pszLink)
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{
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// delete the existing link
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LONG Error = DeleteRegLink(hk, pszLink);
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//
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// It's ok if the deletion fails because the classes key, link or nonlink,
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// doesn't exist. It's also ok if it fails because the key exists but is not
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// a link and has children -- in this case, the key and its children will
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// be eliminated by a subsequent call to RegDelNode.
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//
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if (ERROR_SUCCESS != Error) {
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if ((ERROR_FILE_NOT_FOUND != Error) && (ERROR_ACCESS_DENIED != Error)) {
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return Error;
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}
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}
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//
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// Just to be safe, destroy any existing HKCU\Software\Classes and children.
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// This key may exist from previous unreleased versions of NT5, or from
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// someone playing around with hive files and adding bogus keys
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//
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if (!RegDelnode (hk, (LPTSTR)pszLink)) {
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Error = GetLastError();
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//
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// It's ok if this fails because the key doesn't exist, since
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// nonexistence is our goal.
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//
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if (ERROR_FILE_NOT_FOUND != Error) {
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return Error;
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}
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}
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return ERROR_SUCCESS;
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}
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LONG CUserHives::_CreateLink(USERHIVE *phive)
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{
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LONG error = _DeleteLink(_pup->hKeyCurrentUser, phive->pszLink);
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if (error == ERROR_SUCCESS)
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{
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//
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// At this point, we know that no HKCU\Software\Classes exists, so we should
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// be able to make a link there which points to the hive with the user class
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// data.
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//
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if (!phive->pszTargetSubkey || _StrCatSafe(_pszTargetObject, phive->pszTargetSubkey, MAX_PATH))
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error = CreateRegLink(_pup->hKeyCurrentUser, phive->pszLink, _pszTargetObject);
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else
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error = ERROR_NOT_ENOUGH_MEMORY;
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}
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return error;
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}
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//*************************************************************
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//
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// CreateClassesFolder()
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//
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// Purpose: Create the directory for the classes hives
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//
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//
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// Parameters:
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// pProfile - pointer to profile struct
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// szLocalHiveDir - out param for location of
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// classes hive folder.
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//
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// Return: ERROR_SUCCESS if successful
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// other error if an error occurs
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//
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//
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//*************************************************************
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BOOL CUserHives::_CreateHiveFolder(USERHIVE *phive)
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{
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BOOL fRet = FALSE;
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//
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// Find out the correct shell location for our subdir --
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// this call will create it if it doesn't exist.
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// This is a subdir of the user profile which does not
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// roam.
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//
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//
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// Need to do this to fix up a localisation prob. in NT4
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//
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PatchLocalAppData(_pup->hTokenUser);
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if (GetFolderPath(phive->csidl, _pup->hTokenUser, _pszFile))
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{
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// append our appdata sub-dir
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_StrCatSafe(_pszFile, TEXT("\\Microsoft\\Windows\\"), MAX_PATH);
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//
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// We will now create our own subdir, CLASSES_SUBDIRECTORY,
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// inside the local appdata subdir we just received above.
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//
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fRet = CreateNestedDirectory(_pszFile, NULL);
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}
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else
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{
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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}
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return fRet;
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}
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LONG CUserHives::_PostLoadKey(BOOL fNewHive)
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{
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HKEY hk;
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LONG err = RegOpenKeyEx(HKEY_USERS, _pszTargetHive, 0,
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WRITE_DAC | KEY_ENUMERATE_SUB_KEYS | READ_CONTROL,
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&hk);
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if (ERROR_SUCCESS == err)
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{
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if (fNewHive)
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{
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DebugMsg((DM_VERBOSE, TEXT("CreateClassHive: existing user classes hive not found")));
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//
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// An existing hive was not found before we created this hive, so we need
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// to set security on the new hive
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//
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if (SetDefaultUserHiveSecurity(_pup, NULL, hk))
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{
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if (!SetFileAttributes (_pszFile, FILE_ATTRIBUTE_HIDDEN))
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{
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DebugMsg((DM_WARNING, TEXT("CreateClassHive: unable to set file attributes")
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TEXT(" on classes hive %s with error %x"), _pszFile, GetLastError()));
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}
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}
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else
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err = GetLastError();
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}
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RegCloseKey(hk);
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}
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return err;
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}
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LONG CUserHives::_CreateHiveFile(HKEY hk)
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{
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LONG err = ERROR_PRIVILEGE_NOT_HELD;
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NTSTATUS status = STATUS_SUCCESS;
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BOOLEAN fEnabled;
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BOOL fAdjusted = FALSE;
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HANDLE hToken;
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if(!OpenThreadToken(GetCurrentThread(), TOKEN_READ, TRUE, &hToken)
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|| hToken == NULL)
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{
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fAdjusted = TRUE;
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status = RtlAdjustPrivilege(SE_BACKUP_PRIVILEGE, TRUE, FALSE, &fEnabled);
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}
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else
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{
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CloseHandle(hToken);
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}
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if (NT_SUCCESS(status))
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{
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err = RegSaveKeyEx(hk, _pszFile, NULL, REG_LATEST_FORMAT);
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if(fAdjusted)
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{
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RtlAdjustPrivilege(SE_BACKUP_PRIVILEGE, fEnabled, FALSE, &fEnabled);
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}
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}
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return err;
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}
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LONG CUserHives::_PreLoadKey(BOOL fNewHive, LPCTSTR pszSub)
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{
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LONG err = ERROR_SUCCESS;
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if (fNewHive)
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{
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// we need to create it using REG_LATEST_FORMAT
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HKEY hk;
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err = RegCreateKeyEx(_pup->hKeyCurrentUser, TEXT("UserTempHive"), 0, NULL,
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REG_OPTION_NON_VOLATILE,
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MAXIMUM_ALLOWED, NULL,
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&hk, NULL);
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if (ERROR_SUCCESS == err)
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{
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if (pszSub)
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{
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HKEY hkSub;
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err = RegCreateKeyEx(hk, pszSub + 1, 0, NULL,
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REG_OPTION_NON_VOLATILE,
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MAXIMUM_ALLOWED, NULL,
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&hkSub, NULL);
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if (ERROR_SUCCESS == err)
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{
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RegCloseKey(hkSub);
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}
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else
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{
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DebugMsg((DM_WARNING, TEXT("CUserHives::_PreLoadKey() failed to create %s"), pszSub + 1));
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}
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}
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RegFlushKey(hk);
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if (ERROR_SUCCESS == err)
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{
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err = _CreateHiveFile(hk);
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}
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RegCloseKey(hk);
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RegDelnode(_pup->hKeyCurrentUser, TEXT("UserTempHive"));
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}
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}
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return err;
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}
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BOOL CUserHives::_MakeTargetHive(LPCTSTR pszHive)
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{
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// construct the hive name by appending the suffix to the sid
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lstrcpyn(_pszTargetHive, _sid, CCH_TARGETHIVE);
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return _StrCatSafe(_pszTargetHive, pszHive, CCH_TARGETHIVE);
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}
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LONG CUserHives::_CreateUserHive(USERHIVE *phive)
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{
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// need to do something special if it doesnt already exist
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BOOL fNewHive = (-1 == GetFileAttributes(_pszFile));
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LONG err = _PreLoadKey(fNewHive, phive->pszTargetSubkey);
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// mount the hive
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if (ERROR_SUCCESS == err)
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{
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err = MyRegLoadKey(HKEY_USERS, _pszTargetHive, _pszFile);
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if (ERROR_SUCCESS == err)
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{
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err = _PostLoadKey(fNewHive);
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if (ERROR_SUCCESS == err)
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{
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err = _CreateLink(phive);
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}
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}
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else
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{
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DebugMsg((DM_VERBOSE, TEXT("CreateClassHive: existing user classes hive found")));
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}
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}
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return err;
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}
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LONG CUserHives::_LoadHive(USERHIVE *phive)
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{
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// create the directory for the user-specific classes hive
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LONG error = ERROR_NOT_ENOUGH_MEMORY;
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if (_CreateHiveFolder(phive) && _MakeTargetHive(phive->pszHive))
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{
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if (0 == lstrcmp(phive->pszHive, USER_CLASSES_HIVE_SUFFIX))
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{
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// Move HKCU\Software\Classes before merging the two
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// branches. Ignore any errors here as this branch is
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// about to be deleted by the merge anyway.
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// The reason for this move is because NT4 stores customized
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// shell icons in HKCU\Software\Classes\CLSID\{CLSID_x} and
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// NT5 stores this at HKCU\Software\Microsoft\Windows\
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// CurrentVersion\Explorer\CLSID\{CLSID_x} and must be moved
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// now before being deleted.
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LONG error = MoveUserClassesBeforeMerge(_pup, _pszFile);
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if (ERROR_SUCCESS != error)
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{
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DebugMsg((DM_WARNING, TEXT("MoveUserClassesBeforeMerge: Failed unexpectedly (%d)."),
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error));
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}
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}
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// append the file name to load/save to
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if (_StrCatSafe(_pszFile, phive->pszFile, MAX_PATH))
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{
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error = _CreateUserHive(phive);
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if (ERROR_SUCCESS != error)
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{
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DebugMsg((DM_WARNING, TEXT("LoadUserClasses: Failed to create user classes hive (%d)."), error));
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}
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}
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}
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else
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error = GetLastError();
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return error;
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}
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CUserHives::~CUserHives()
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{
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if (_pszFile)
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LocalFree(_pszFile);
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}
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BOOL CUserHives::_Init(USERPROFILE *pProfile, LPCTSTR pszSid)
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{
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// unref'd vars!!!
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_pup = pProfile;
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_sid = pszSid;
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_pszFile = (LPTSTR) LocalAlloc(LPTR, (MAX_PATH * sizeof(TCHAR)) * 2);
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if (_pszFile)
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{
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//
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// WARNING - we are being a little clever here
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// we only allocate one buffer (_pszFile) that is MAX_PATH * 2
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// we then split it up into two buffers of MAX_PATH (_pszFile & _pszTargetObject)
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// _pszTargetObject has a constant prefix of USER_KEY_PREFIX ("\Registry\User\")
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// we later append the key name that we will load under HKU.
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// _pszTargetHive points to that value.
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//
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// ie _pszTargetObject = "\Registry\User\{SID}_Windows"
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// _pszTargetHive = "{SID}_Windows"
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//
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_pszTargetObject = _pszFile + MAX_PATH;
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lstrcpy(_pszTargetObject, USER_KEY_PREFIX);
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_pszTargetHive = _pszTargetObject + sizeof(USER_KEY_PREFIX) / sizeof(TCHAR) - 1;
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return TRUE;
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}
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return FALSE;
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}
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LONG CUserHives::LoadHives(USERPROFILE *pProfile, LPTSTR pszSid)
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{
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LONG error;
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if (_Init(pProfile, pszSid))
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{
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// load each of the hives in turn
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for (int i = 0; i < ARRAYSIZE(s_hives); i++)
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{
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error = _LoadHive(&s_hives[i]);
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if (error != ERROR_SUCCESS)
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break;
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}
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}
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else
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error = ERROR_NOT_ENOUGH_MEMORY;
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return error;
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}
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LONG LoadUserHives(LPPROFILE pProfile, LPTSTR pszSid)
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{
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CUserHives hives;
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return hives.LoadHives(pProfile, pszSid);
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}
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BOOL CUserHives::_UnloadHive(LPCTSTR pszHive)
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{
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if (_MakeTargetHive(pszHive))
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{
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HKEY hKey;
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OBJECT_ATTRIBUTES oa;
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UNICODE_STRING usTargetObject;
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//
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// Initialize string for lpSubKey param
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//
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RtlInitUnicodeString(&usTargetObject, _pszTargetObject);
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InitializeObjectAttributes(&oa,
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&usTargetObject,
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OBJ_CASE_INSENSITIVE,
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NULL,
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NULL);
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NTSTATUS Status = NtOpenKey((PHANDLE)&hKey,
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KEY_READ,
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&oa);
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if (NT_SUCCESS(Status))
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{
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//
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// Make sure the hive is persisted properly
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//
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RegFlushKey(hKey);
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RegCloseKey(hKey);
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//
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// Unmount the hive -- this should only fail if
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// someone has a subkey of the hive open -- this
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// should not normally happen and probably means there's a service
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// that is leaking keys.
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//
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return MyRegUnLoadKey(HKEY_USERS, _pszTargetHive);
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}
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}
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DebugMsg((DM_WARNING, TEXT("UnLoadClassHive: failed to unload user hive %s"), pszHive));
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return FALSE;
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}
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BOOL CUserHives::UnloadHives(LPCTSTR pszSid)
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{
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if (_Init(NULL, pszSid))
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{
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// load each of the hives in turn
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for (int i = 0; i < ARRAYSIZE(s_hives); i++)
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{
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if (!_UnloadHive(s_hives[i].pszHive))
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return FALSE;
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}
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}
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return TRUE;
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}
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BOOL UnloadUserHives(LPTSTR pszSid)
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{
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CUserHives hives;
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// remove the implicit reference held by this process
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RegCloseKey(HKEY_CLASSES_ROOT);
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return hives.UnloadHives(pszSid);
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}
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