Source code of Windows XP (NT5)
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//+---------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1993 - 1994.
//
// File: virtreg.cpp
//
// Contents: Implements the class CVirtualRegistry which manages a
// virtual registry
//
// Classes:
//
// Methods: CVirtualRegistry::CVirtualRegistry
// CVirtualRegistry::~CVirtualRegistry
// CVirtualRegistry::ReadRegSzNamedValue
// CVirtualRegistry::NewRegSzNamedValue
// CVirtualRegistry::ChgRegSzNamedValue
// CVirtualRegistry::ReadRegDwordNamedValue
// CVirtualRegistry::NewRegDwordNamedValue
// CVirtualRegistry::ChgRegDwordNamedValue
// CVirtualRegistry::NewRegSingleACL
// CVirtualRegistry::ChgRegACL
// CVirtualRegistry::NewRegKeyACL
// CVirtualRegistry::ReadLsaPassword
// CVirtualRegistry::NewLsaPassword
// CVirtualRegistry::ChgLsaPassword
// CVirtualRegistry::ReadSrvIdentity
// CVirtualRegistry::NewSrvIdentity
// CVirtualRegistry::ChgSrvIdentity
// CVirtualRegistry::MarkForDeletion
// CVirtualRegistry::GetAt
// CVirtualRegistry::Remove
// CVirtualRegistry::Cancel
// CVirtualRegistry::Apply
// CVirtualRegistry::ApplyAll
// CVirtualRegistry::Ok
// CVirtualRegistry::SearchForRegEntry
// CVirtualRegistry::SearchForLsaEntry
// CVirtualRegistry::SearchForSrvEntry
//
// History: 23-Apr-96 BruceMa Created.
// 15-Dec-96 RonanS Tidied up to remove memory leaks
// Use array of pointers to avoid bitwise copy
//
//----------------------------------------------------------------------
#include "stdafx.h"
#include "afxtempl.h"
#include "assert.h"
extern "C"
{
#include "ntlsa.h"
}
#include "winsvc.h"
#include "types.h"
#include "datapkt.h"
extern "C"
{
#include <getuser.h>
}
#include "util.h"
#include "virtreg.h"
#include "tchar.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
CVirtualRegistry::CVirtualRegistry(void)
{
m_pkts.SetSize(0, 8);
}
CVirtualRegistry::~CVirtualRegistry(void)
{
// ronans - remove any remaining items
RemoveAll();
}
// Read a named string value from the registry and cache it
int CVirtualRegistry::ReadRegSzNamedValue(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName,
int *pIndex)
{
int err;
HKEY hKey;
ULONG lSize;
DWORD dwType;
TCHAR *szVal = new TCHAR[MAX_PATH];
// Check if we already have an entry for this
*pIndex = SearchForRegEntry(hRoot, szKeyPath, szValueName);
if (*pIndex >= 0)
{
CDataPacket *pCdp = GetAt(*pIndex);
ASSERT(pCdp); // should always be non null
if (pCdp -> fDelete)
{
*pIndex = -1;
delete szVal;
return ERROR_FILE_NOT_FOUND;
}
else
{
delete szVal;
return ERROR_SUCCESS;
}
}
// Open the referenced key
if ((err = RegOpenKeyEx(hRoot, szKeyPath, 0, KEY_ALL_ACCESS, &hKey)) != ERROR_SUCCESS)
{
g_util.CkForAccessDenied(err);
delete szVal;
return err;
}
// Attempt to read the named value
lSize = MAX_PATH * sizeof(TCHAR);
if ((err = RegQueryValueEx(hKey, szValueName, NULL, &dwType, (BYTE *) szVal,
&lSize))
!= ERROR_SUCCESS)
{
g_util.CkForAccessDenied(err);
if (hKey != hRoot)
{
RegCloseKey(hKey);
}
delete szVal;
return err;
}
// Build a data packet
if (dwType == REG_SZ)
{
CDataPacket * pNewPacket = new CDataPacket(hRoot, szKeyPath, szValueName, szVal);
ASSERT(pNewPacket);
if (!pNewPacket)
{
return ERROR_NOT_ENOUGH_MEMORY;
}
*pIndex = m_pkts.Add(pNewPacket);
pNewPacket->fDirty = FALSE;
delete szVal;
return ERROR_SUCCESS;
}
else
{
delete szVal;
return ERROR_BAD_TOKEN_TYPE;
}
}
int CVirtualRegistry::NewRegSzNamedValue(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName,
TCHAR *szVal,
int *pIndex)
{
// It may be in the virtual registry but marked for deletion
*pIndex = SearchForRegEntry(hRoot, szKeyPath, szValueName);
if (*pIndex >= 0)
{
CDataPacket *pCdp = GetAt(*pIndex);
pCdp->MarkForDeletion(FALSE);
pCdp->ChgSzValue(szVal);
return ERROR_SUCCESS;
}
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(hRoot, szKeyPath, szValueName, szVal);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
return ERROR_SUCCESS;
}
void CVirtualRegistry::ChgRegSzNamedValue(int nIndex, TCHAR *szVal)
{
CDataPacket * pCdp = m_pkts.ElementAt(nIndex);
pCdp->ChgSzValue(szVal);
pCdp->fDirty = TRUE;
}
// Read a named DWORD value from the registry
int CVirtualRegistry::ReadRegDwordNamedValue(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName,
int *pIndex)
{
int err;
HKEY hKey;
ULONG lSize;
DWORD dwType;
DWORD dwVal;
// Check if we already have an entry for this
*pIndex = SearchForRegEntry(hRoot, szKeyPath, szValueName);
if (*pIndex >= 0)
{
return ERROR_SUCCESS;
}
// Open the referenced key
if ((err = RegOpenKeyEx(hRoot, szKeyPath, 0, KEY_ALL_ACCESS, &hKey)) != ERROR_SUCCESS)
{
g_util.CkForAccessDenied(err);
return err;
}
// Attempt to read the named value
lSize = sizeof(DWORD);
if ((err = RegQueryValueEx(hKey, szValueName, NULL, &dwType, (BYTE *) &dwVal,
&lSize))
!= ERROR_SUCCESS)
{
g_util.CkForAccessDenied(err);
if (hKey != hRoot)
{
RegCloseKey(hKey);
}
return err;
}
// Close the registry key
if (hKey != hRoot)
{
RegCloseKey(hKey);
}
// Build a data packet
if (dwType == REG_DWORD)
{
CDataPacket * pNewPacket = new CDataPacket(hRoot, szKeyPath, szValueName, dwVal);
ASSERT(pNewPacket);
if (!pNewPacket)
{
return ERROR_NOT_ENOUGH_MEMORY;
}
*pIndex = m_pkts.Add(pNewPacket);
pNewPacket->fDirty = FALSE;
return ERROR_SUCCESS;
}
else
{
return ERROR_BAD_TOKEN_TYPE;
}
}
int CVirtualRegistry::NewRegDwordNamedValue(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName,
DWORD dwVal,
int *pIndex)
{
// It may be in the virtual registry but marked for deletion
*pIndex = SearchForRegEntry(hRoot, szKeyPath, szValueName);
if (*pIndex >= 0)
{
CDataPacket *pCdp = GetAt(*pIndex);
pCdp->MarkForDeletion(FALSE);
pCdp -> pkt.nvdw.dwValue = dwVal;
return ERROR_SUCCESS;
}
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(hRoot, szKeyPath, szValueName, dwVal);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
pNewPacket->fDirty = FALSE;
return ERROR_SUCCESS;
}
void CVirtualRegistry::ChgRegDwordNamedValue(int nIndex, DWORD dwVal)
{
CDataPacket *pCdp = m_pkts.ElementAt(nIndex);
pCdp -> pkt.nvdw.dwValue = dwVal;
pCdp -> fDirty = TRUE;
}
int CVirtualRegistry::NewRegSingleACL(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName,
SECURITY_DESCRIPTOR *pacl,
BOOL fSelfRelative,
int *pIndex)
{
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(hRoot, szKeyPath, szValueName, pacl, fSelfRelative);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
return ERROR_SUCCESS;
}
void CVirtualRegistry::ChgRegACL(int nIndex,
SECURITY_DESCRIPTOR *pacl,
BOOL fSelfRelative)
{
CDataPacket *pCdp = m_pkts.ElementAt(nIndex);
pCdp -> ChgACL(pacl, fSelfRelative);
pCdp -> fDirty = TRUE;
}
int CVirtualRegistry::NewRegKeyACL(HKEY hKey,
HKEY *phClsids,
unsigned cClsids,
TCHAR *szTitle,
SECURITY_DESCRIPTOR *paclOrig,
SECURITY_DESCRIPTOR *pacl,
BOOL fSelfRelative,
int *pIndex)
{
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(hKey, phClsids, cClsids, szTitle, paclOrig, pacl, fSelfRelative);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
return ERROR_SUCCESS;
}
int CVirtualRegistry::ReadLsaPassword(CLSID &clsid,
int *pIndex)
{
#ifdef UNICODE
LSA_OBJECT_ATTRIBUTES sObjAttributes;
HANDLE hPolicy = NULL;
LSA_UNICODE_STRING sKey;
TCHAR szKey[GUIDSTR_MAX + 5];
PLSA_UNICODE_STRING psPassword;
// Check if we already have an entry fo this
*pIndex = SearchForLsaEntry(clsid);
if (*pIndex >= 0)
{
return ERROR_SUCCESS;
}
// Formulate the access key
_tcscpy(szKey, TEXT("SCM:"));
g_util.StringFromGUID(clsid, &szKey[4], GUIDSTR_MAX);
szKey[GUIDSTR_MAX + 4] = TEXT('\0');
// UNICODE_STRING length fields are in bytes and include the NULL
// terminator
sKey.Length = (_tcslen(szKey) + 1) * sizeof(TCHAR);
sKey.MaximumLength = (GUIDSTR_MAX + 5) * sizeof(TCHAR);
sKey.Buffer = szKey;
// Open the local security policy
InitializeObjectAttributes(&sObjAttributes, NULL, 0L, NULL, NULL);
if (!NT_SUCCESS(LsaOpenPolicy(NULL, &sObjAttributes,
POLICY_GET_PRIVATE_INFORMATION, &hPolicy)))
{
return GetLastError();
}
// Read the user's password
if (!NT_SUCCESS(LsaRetrievePrivateData(hPolicy, &sKey, &psPassword)))
{
LsaClose(hPolicy);
return GetLastError();
}
// Close the policy handle, we're done with it now.
LsaClose(hPolicy);
// Build a data packet
CDataPacket * pNewPacket = new CDataPacket(psPassword->Buffer, clsid);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
pNewPacket->fDirty = FALSE;
*pIndex = m_pkts.Add(pNewPacket);
#endif
return ERROR_SUCCESS;
}
int CVirtualRegistry::NewLsaPassword(CLSID &clsid,
TCHAR *szPassword,
int *pIndex)
{
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(szPassword, clsid);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
return ERROR_SUCCESS;
}
void CVirtualRegistry::ChgLsaPassword(int nIndex,
TCHAR *szPassword)
{
CDataPacket *pCdp = m_pkts.ElementAt(nIndex);
delete pCdp -> pkt.pw.szPassword;
pCdp -> pkt.pw.szPassword = new TCHAR[_tcslen(szPassword) + 1];
_tcscpy(pCdp -> pkt.pw.szPassword, szPassword);
pCdp -> fDirty = TRUE;
}
int CVirtualRegistry::ReadSrvIdentity(TCHAR *szService,
int *pIndex)
{
SC_HANDLE hSCManager;
SC_HANDLE hService;
QUERY_SERVICE_CONFIG sServiceQueryConfig;
DWORD dwSize;
// Check if we already have an entry fo this
*pIndex = SearchForSrvEntry(szService);
if (*pIndex >= 0)
{
return ERROR_SUCCESS;
}
// Open the service control manager
if (hSCManager = OpenSCManager(NULL, NULL, GENERIC_READ))
{
// Open a handle to the requested service
if (hService = OpenService(hSCManager, szService, GENERIC_READ))
{
// Close the service manager's database
CloseServiceHandle(hSCManager);
// Query the service
if (QueryServiceConfig(hService, &sServiceQueryConfig,
sizeof(SERVICE_QUERY_CONFIG), &dwSize))
{
// Build a data packet
CDataPacket * pNewPacket = new CDataPacket(szService, sServiceQueryConfig.lpServiceStartName);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
pNewPacket->fDirty = FALSE;
*pIndex = m_pkts.Add(pNewPacket);
// Return success
CloseServiceHandle(hSCManager);
CloseServiceHandle(hService);
return ERROR_SUCCESS;
}
}
CloseServiceHandle(hSCManager);
}
return GetLastError();
}
int CVirtualRegistry::NewSrvIdentity(TCHAR *szService,
TCHAR *szIdentity,
int *pIndex)
{
// Build a data packet and add it
CDataPacket * pNewPacket = new CDataPacket(szService, szIdentity);
ASSERT(pNewPacket);
if (!pNewPacket)
return ERROR_NOT_ENOUGH_MEMORY;
*pIndex = m_pkts.Add(pNewPacket);
return ERROR_SUCCESS;
}
void CVirtualRegistry::ChgSrvIdentity(int nIndex,
TCHAR *szIdentity)
{
CDataPacket *pCdp = m_pkts.ElementAt(nIndex);
delete pCdp -> pkt.si.szIdentity;
pCdp -> pkt.si.szIdentity = new TCHAR[_tcslen(szIdentity) + 1];
_tcscpy(pCdp -> pkt.si.szIdentity, szIdentity);
pCdp -> fDirty = TRUE;
}
void CVirtualRegistry::MarkForDeletion(int nIndex)
{
CDataPacket *pCdp = GetAt(nIndex);
pCdp -> fDelete = TRUE;
pCdp -> fDirty = TRUE;
}
CDataPacket * CVirtualRegistry::GetAt(int nIndex)
{
return m_pkts.ElementAt(nIndex);
}
void CVirtualRegistry::Remove(int nIndex)
{
CDataPacket * pCdp = GetAt(nIndex);
// ronans - must always destroy even if packet has not been marked dirty
if (pCdp)
delete pCdp;
// overwrite with empty data packet
m_pkts.SetAt(nIndex, new CDataPacket);
}
void CVirtualRegistry::RemoveAll(void)
{
int nSize = m_pkts.GetSize();
for (int k = 0; k < nSize; k++)
Remove(k);
m_pkts.RemoveAll();
}
void CVirtualRegistry::Cancel(int nIndex)
{
int nSize = m_pkts.GetSize();
for (int k = nIndex; k < nSize; k++)
{
m_pkts.SetAt(nIndex, new CDataPacket);
}
}
int CVirtualRegistry::Apply(int nIndex)
{
int err = ERROR_SUCCESS;
int nSize = m_pkts.GetSize();
CDataPacket *pCdp = m_pkts.ElementAt(nIndex);
if (pCdp -> fDirty)
{
switch (pCdp -> tagType)
{
case Empty:
break;
case NamedValueSz:
if (pCdp -> fDelete)
{
g_util.DeleteRegValue(pCdp -> pkt.nvsz.hRoot,
pCdp -> pkt.nvsz.szKeyPath,
pCdp -> pkt.nvsz.szValueName);
}
else
{
err = g_util.WriteRegSzNamedValue(pCdp -> pkt.nvsz.hRoot,
pCdp -> pkt.nvsz.szKeyPath,
pCdp -> pkt.nvsz.szValueName,
pCdp -> pkt.nvsz.szValue,
_tcslen(pCdp -> pkt.nvsz.szValue) + 1);
}
break;
case NamedValueDword:
if (pCdp -> fDelete)
{
g_util.DeleteRegValue(pCdp -> pkt.nvdw.hRoot,
pCdp -> pkt.nvdw.szKeyPath,
pCdp -> pkt.nvdw.szValueName);
}
else
{
err = g_util.WriteRegDwordNamedValue(pCdp -> pkt.nvdw.hRoot,
pCdp -> pkt.nvdw.szKeyPath,
pCdp -> pkt.nvdw.szValueName,
pCdp -> pkt.nvdw.dwValue);
}
break;
case SingleACL:
if (pCdp -> fDelete)
{
HKEY hKey;
if (RegOpenKeyEx(pCdp -> pkt.acl.hRoot,
pCdp -> pkt.acl.szKeyPath,
0,
KEY_ALL_ACCESS,
&hKey) == ERROR_SUCCESS)
{
RegDeleteValue(hKey, pCdp -> pkt.acl.szValueName);
RegCloseKey(hKey);
}
}
else
{
err = g_util.WriteRegSingleACL(pCdp -> pkt.acl.hRoot,
pCdp -> pkt.acl.szKeyPath,
pCdp -> pkt.acl.szValueName,
pCdp -> pkt.acl.pSec);
}
break;
case RegKeyACL:
err = g_util.WriteRegKeyACL(pCdp -> pkt.racl.hKey,
pCdp -> pkt.racl.phClsids,
pCdp -> pkt.racl.cClsids,
pCdp -> pkt.racl.pSec,
pCdp -> pkt.racl.pSecOrig);
break;
case Password:
err = g_util.WriteLsaPassword(pCdp -> pkt.pw.appid,
pCdp -> pkt.pw.szPassword);
break;
case ServiceIdentity:
err = g_util.WriteSrvIdentity(pCdp -> pkt.si.szServiceName,
pCdp -> pkt.si.szIdentity);
break;
}
}
// Cleanup work
if (err == ERROR_SUCCESS)
{
pCdp -> fDirty = FALSE;
}
else
{
if (err == ERROR_ACCESS_DENIED)
{
g_util.CkForAccessDenied(ERROR_ACCESS_DENIED);
}
else
{
g_util.PostErrorMessage();
}
}
return err;;
}
int CVirtualRegistry::ApplyAll(void)
{
int nSize = m_pkts.GetSize();
// Persist all non-empty data packets
for (int k = 0; k < nSize; k++)
{
Apply(k);
}
return ERROR_SUCCESS;
}
int CVirtualRegistry::Ok(int nIndex)
{
return 0;
}
int CVirtualRegistry::SearchForRegEntry(HKEY hRoot,
TCHAR *szKeyPath,
TCHAR *szValueName)
{
int nSize = m_pkts.GetSize();
for (int k = 0; k < nSize; k++)
{
CDataPacket *pCdp = GetAt(k);
if ((pCdp -> tagType == NamedValueSz &&
pCdp -> pkt.nvsz.hRoot == hRoot &&
(_tcscmp(pCdp -> pkt.nvsz.szKeyPath, szKeyPath) == 0) &&
(_tcscmp(pCdp -> pkt.nvsz.szValueName, szValueName) == 0)) ||
(pCdp -> tagType == NamedValueDword &&
pCdp -> pkt.nvdw.hRoot == hRoot &&
(_tcscmp(pCdp -> pkt.nvdw.szKeyPath, szKeyPath) == 0) &&
(_tcscmp(pCdp -> pkt.nvdw.szValueName, szValueName) == 0)))
{
return k;
}
}
return -1;
}
int CVirtualRegistry::SearchForLsaEntry(CLSID appid)
{
int nSize = m_pkts.GetSize();
for (int k = 0; k < nSize; k++)
{
CDataPacket *pCdp = GetAt(k);
if (pCdp -> tagType == Password &&
g_util.IsEqualGuid(pCdp -> pkt.pw.appid, appid))
{
return k;
}
}
return -1;
}
int CVirtualRegistry::SearchForSrvEntry(TCHAR *szServiceName)
{
int nSize = m_pkts.GetSize();
for (int k = 0; k < nSize; k++)
{
CDataPacket *pCdp = GetAt(k);
if (pCdp -> tagType == ServiceIdentity &&
(_tcscmp(pCdp -> pkt.si.szServiceName, szServiceName)))
{
return k;
}
}
return -1;
}