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windows-server-2003/base/screg/winreg/client/regkey.c

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/*++
Copyright (c) 1992-2000 Microsoft Corporation
Module Name:
Regkey.c
Abstract:
This module contains the client side wrappers for the Win32 Registry
APIs to open, create, flush and close keys. That is:
- RegCloseKey
- RegCreateKeyA
- RegCreateKeyW
- RegCreateKeyExA
- RegCreateKeyExW
- RegFlushKey
- RegOpenKeyA
- RegOpenKeyW
- RegOpenKeyExA
- RegOpenKeyExW
- RegOverridePredefKey
- RegOpenCurrentUser
Author:
David J. Gilman (davegi) 15-Nov-1991
Notes:
See the notes in server\regkey.c.
--*/
#include <rpc.h>
#include "regrpc.h"
#include "client.h"
#include <wow64reg.h>
#if defined(LEAK_TRACK)
NTSTATUS TrackObject(HKEY hKey);
#endif // defined(LEAK_TRACK)
NTSTATUS DisablePredefinedHandleTable(HKEY Handle);
LONG
APIENTRY
RegCloseKey (
IN HKEY hKey
)
/*++
Routine Description:
Win32 RPC wrapper for closeing a key handle.
--*/
{
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
if( hKey == NULL ) {
return ERROR_INVALID_HANDLE;
}
if( IsPredefinedRegistryHandle( hKey )) {
return( ClosePredefinedHandle( hKey ) );
}
if( IsLocalHandle( hKey )) {
#if defined(_WIN64)
Wow64RegCloseKey (hKey);
#endif
return ( LONG ) LocalBaseRegCloseKey( &hKey );
} else {
hKey = DereferenceRemoteHandle( hKey );
return ( LONG ) BaseRegCloseKey( &hKey );
}
}
LONG
APIENTRY
RegOverridePredefKey (
IN HKEY hKey,
IN HKEY hNewKey
)
/*++
Routine Description:
Win32 wrapper to override the normal value for a predefined key.
--*/
{
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
if( hKey == NULL ) {
return ERROR_INVALID_HANDLE;
}
if( !IsPredefinedRegistryHandle( hKey )) {
return ERROR_INVALID_HANDLE;
}
{
NTSTATUS Status;
Status = RemapPredefinedHandle( hKey, hNewKey );
return RtlNtStatusToDosError( Status );
}
}
LONG
APIENTRY
RegCreateKeyA (
HKEY hKey,
LPCSTR lpSubKey,
PHKEY phkResult
)
/*++
Routine Description:
Win 3.1 ANSI RPC wrapper for opening an existing key or creating a new one.
--*/
{
LONG Error;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
//
// Win3.1ism - Win 3.1 allows the predefined handle to be opened by
// specifying a pointer to an empty or NULL string for the sub-key.
//
//
// If the subkey is NULL or points to a NUL string and the handle is
// predefined, just return the predefined handle (a virtual open)
// otherwise it's an error.
//
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
if(( lpSubKey == NULL ) || ( *lpSubKey == '\0' )) {
if( IsPredefinedRegistryHandle( hKey )) {
*phkResult = hKey;
return ERROR_SUCCESS;
} else {
return ERROR_BADKEY;
}
}
Error = (LONG)RegCreateKeyExA(
hKey,
lpSubKey,
0,
WIN31_CLASS,
REG_OPTION_NON_VOLATILE,
WIN31_REGSAM,
NULL,
phkResult,
NULL
);
return Error;
}
LONG
APIENTRY
RegCreateKeyW (
HKEY hKey,
LPCWSTR lpSubKey,
PHKEY phkResult
)
/*++
Routine Description:
Win 3.1 Unicode RPC wrapper for opening an existing key or creating a
new one.
--*/
{
LONG Error;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
Error = (LONG)RegCreateKeyExW(
hKey,
lpSubKey,
0,
WIN31_CLASS,
REG_OPTION_NON_VOLATILE,
WIN31_REGSAM,
NULL,
phkResult,
NULL
);
return Error;
}
LONG
APIENTRY
RegCreateKeyExA (
HKEY hKey,
LPCSTR lpSubKey,
DWORD Reserved,
LPSTR lpClass,
DWORD dwOptions,
REGSAM samDesired,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
PHKEY phkResult,
LPDWORD lpdwDisposition
)
/*++
Routine Description:
Win32 ANSI RPC wrapper for opening an existing key or creating a new one.
RegCreateKeyExA converts the LPSECURITY_ATTRIBUTES argument to a
RPC_SECURITY_ATTRIBUTES argument and calls BaseRegCreateKeyExA.
--*/
{
UNICODE_STRING SubKey;
UNICODE_STRING ClassUnicode;
PUNICODE_STRING Class;
ANSI_STRING AnsiString;
PRPC_SECURITY_ATTRIBUTES pRpcSA;
RPC_SECURITY_ATTRIBUTES RpcSA;
NTSTATUS Status;
LONG Error;
HKEY TempHandle = NULL;
#if DBG
if ( BreakPointOnEntry ) {
OutputDebugString( "In RegCreateKeyExA\n" );
DbgBreakPoint();
}
#endif
//
// Limit the capabilities associated with HKEY_PERFORMANCE_DATA.
//
if(( hKey == HKEY_PERFORMANCE_DATA ) ||
( hKey == HKEY_PERFORMANCE_TEXT ) ||
( hKey == HKEY_PERFORMANCE_NLSTEXT )) {
return ERROR_INVALID_HANDLE;
}
//
// Ensure Reserved is zero to avoid future compatability problems.
//
if( Reserved != 0 ) {
return ERROR_INVALID_PARAMETER;
}
//
// Validate that the sub key is not NULL.
//
if( !lpSubKey || !phkResult ) {
return ERROR_BADKEY;
}
hKey = MapPredefinedHandle( hKey, &TempHandle );
if( hKey == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
//
// Convert the subkey to a counted Unicode string
//
if( !RtlCreateUnicodeStringFromAsciiz(&SubKey,lpSubKey) ) {
Status = STATUS_NO_MEMORY;
Error = RtlNtStatusToDosError( Status );
goto ExitCleanup;
}
//
// Add size of NULL so that RPC transmits the right
// stuff.
//
SubKey.Length += sizeof( UNICODE_NULL );
if (ARGUMENT_PRESENT( lpClass )) {
//
// Convert the class name to a counted Unicode string using a counted
// Unicode string dynamically allocated by RtlAnsiStringToUnicodeString.
//
RtlInitAnsiString( &AnsiString, lpClass );
Status = RtlAnsiStringToUnicodeString(
&ClassUnicode,
&AnsiString,
TRUE
);
if( ! NT_SUCCESS( Status )) {
Error = RtlNtStatusToDosError( Status );
RtlFreeUnicodeString( &SubKey );
goto ExitCleanup;
}
Class = &ClassUnicode;
Class->Length += sizeof( UNICODE_NULL );
} else {
Class = &ClassUnicode;
Class->Length = 0;
Class->MaximumLength = 0;
Class->Buffer = NULL;
}
//
// If the caller supplied a LPSECURITY_ATTRIBUTES argument, map
// it to the RPCable version.
//
if( ARGUMENT_PRESENT( lpSecurityAttributes )) {
pRpcSA = &RpcSA;
Error = MapSAToRpcSA( lpSecurityAttributes, pRpcSA );
if( Error != ERROR_SUCCESS ) {
RtlFreeUnicodeString( Class );
RtlFreeUnicodeString( &SubKey );
goto ExitCleanup;
}
} else {
//
// No PSECURITY_ATTRIBUTES argument, therefore no mapping was done.
//
pRpcSA = NULL;
}
//
// Call the Base API, passing it the supplied parameters and the
// counted Unicode strings.
//
if( IsLocalHandle( hKey )) {
#if defined(_WIN64)
DWORD dwTempDisposition = 0;
if ( lpdwDisposition == NULL )
lpdwDisposition = &dwTempDisposition;
//
// if wow64 reserve field is set in the access mask, call
// wow64 function to handle the scenario.
//
if ( samDesired & KEY_WOW64_RES ) {
Error = (LONG)Wow64RegCreateKeyEx (
hKey,
SubKey.Buffer,
0, //reserved
Class->Buffer,
dwOptions,
samDesired,
lpSecurityAttributes,
phkResult,
lpdwDisposition
);
} else
#endif
Error = (LONG)LocalBaseRegCreateKey (
hKey,
&SubKey,
Class,
dwOptions,
samDesired,
pRpcSA,
phkResult,
lpdwDisposition
);
#if defined(_WIN64)
if ( ( Error == 0) && ( REG_CREATED_NEW_KEY & *lpdwDisposition) ) //only set dirty if its a newly created key
Wow64RegSetKeyDirty (*phkResult);
#endif
} else {
Error = (LONG)BaseRegCreateKey (
DereferenceRemoteHandle( hKey ),
&SubKey,
Class,
dwOptions,
samDesired,
pRpcSA,
phkResult,
lpdwDisposition
);
if( Error == ERROR_SUCCESS) {
TagRemoteHandle( phkResult );
}
}
//
// Free the counted Unicode string allocated by
// RtlAnsiStringToUnicodeString.
//
if (Class != NULL) {
RtlFreeUnicodeString( Class );
}
//
// Free the RPC_SECURITY_DESCRIPTOR buffer and return the
// Registry return value.
//
if( pRpcSA != NULL ) {
RtlFreeHeap(
RtlProcessHeap( ), 0,
pRpcSA->RpcSecurityDescriptor.lpSecurityDescriptor
);
}
RtlFreeUnicodeString( &SubKey );
ExitCleanup:
CLOSE_LOCAL_HANDLE(TempHandle);
return Error;
}
LONG
APIENTRY
RegCreateKeyExW (
HKEY hKey,
LPCWSTR lpSubKey,
DWORD Reserved,
LPWSTR lpClass,
DWORD dwOptions,
REGSAM samDesired,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
PHKEY phkResult,
LPDWORD lpdwDisposition
)
/*++
Routine Description:
Win32 Unicode RPC wrapper for opening an existing key or creating a new one.
RegCreateKeyExW converts the LPSECURITY_ATTRIBUTES argument to a
RPC_SECURITY_ATTRIBUTES argument and calls BaseRegCreateKeyExW.
--*/
{
UNICODE_STRING SubKey;
UNICODE_STRING ClassUnicode;
PUNICODE_STRING Class;
PRPC_SECURITY_ATTRIBUTES pRpcSA;
RPC_SECURITY_ATTRIBUTES RpcSA;
LONG Error;
PWSTR AuxBuffer;
HKEY TempHandle = NULL;
NTSTATUS Status;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
//
// Limit the capabilities associated with HKEY_PERFORMANCE_DATA.
//
if(( hKey == HKEY_PERFORMANCE_DATA ) ||
( hKey == HKEY_PERFORMANCE_TEXT ) ||
( hKey == HKEY_PERFORMANCE_NLSTEXT )) {
return ERROR_INVALID_HANDLE;
}
//
// Ensure Reserved is zero to avoid future compatability problems.
//
if( Reserved != 0 ) {
return ERROR_INVALID_PARAMETER;
}
//
// Validate that the sub key is not NULL.
//
if( !lpSubKey || !phkResult) {
return ERROR_BADKEY;
}
hKey = MapPredefinedHandle( hKey, &TempHandle );
if( hKey == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
//
// Convert the subkey to a counted Unicode string.
// This also acounts for the NULL we are adding at the end
//
Status = RtlInitUnicodeStringEx(&SubKey, lpSubKey);
if( !NT_SUCCESS(Status) ) {
Error = RtlNtStatusToDosError( Status );
goto ExitCleanup;
}
//
// Add terminating NULL to Length so that RPC transmits it.
//
SubKey.Length += sizeof( UNICODE_NULL );
if (ARGUMENT_PRESENT( lpClass )) {
//
// Convert the class name to a counted Unicode string.
// This also acounts for the NULL we are adding at the end
//
Status = RtlInitUnicodeStringEx(&ClassUnicode, lpClass);
if( !NT_SUCCESS(Status) ) {
Error = RtlNtStatusToDosError( Status );
goto ExitCleanup;
}
Class = &ClassUnicode;
Class->Length += sizeof( UNICODE_NULL );
} else {
Class = &ClassUnicode;
Class->Length = 0;
Class->MaximumLength = 0;
Class->Buffer = NULL;
}
//
// If the caller supplied a LPSECURITY_ATTRIBUTES argument, map
// it and call the private version of the create key API.
//
if( ARGUMENT_PRESENT( lpSecurityAttributes )) {
pRpcSA = &RpcSA;
Error = MapSAToRpcSA( lpSecurityAttributes, pRpcSA );
if( Error != ERROR_SUCCESS ) {
goto ExitCleanup;
}
} else {
//
// No PSECURITY_ATTRIBUTES argument, therefore no mapping was done.
//
pRpcSA = NULL;
}
//
// Call the Base API, passing it the supplied parameters and the
// counted Unicode strings.
//
if( IsLocalHandle( hKey )) {
#if defined(_WIN64)
DWORD dwTempDisposition = 0;
if ( lpdwDisposition == NULL )
lpdwDisposition = &dwTempDisposition;
//
// if wow64 reserve field is set in the access mask, call
// wow64 function to handle the scenario.
//
if ( samDesired & KEY_WOW64_RES ) {
Error = (LONG)Wow64RegCreateKeyEx (
hKey,
SubKey.Buffer,
0, //reserved
Class->Buffer,
dwOptions,
samDesired,
lpSecurityAttributes,
phkResult,
lpdwDisposition
);
} else
#endif
Error = (LONG)LocalBaseRegCreateKey (
hKey,
&SubKey,
Class,
dwOptions,
samDesired,
pRpcSA,
phkResult,
lpdwDisposition
);
#if defined(_WIN64)
if ( ( Error == 0) && ( REG_CREATED_NEW_KEY & *lpdwDisposition) ) //only set dirty if its a newly created key
Wow64RegSetKeyDirty (*phkResult);
#endif
} else {
Error = (LONG)BaseRegCreateKey (
DereferenceRemoteHandle( hKey ),
&SubKey,
Class,
dwOptions,
samDesired,
pRpcSA,
phkResult,
lpdwDisposition
);
if( Error == ERROR_SUCCESS) {
TagRemoteHandle( phkResult );
}
}
//
// Free the RPC_SECURITY_DESCRIPTOR buffer and return the
// Registry return value.
//
if( pRpcSA != NULL ) {
RtlFreeHeap(
RtlProcessHeap( ), 0,
pRpcSA->RpcSecurityDescriptor.lpSecurityDescriptor
);
}
ExitCleanup:
CLOSE_LOCAL_HANDLE(TempHandle);
return Error;
}
LONG
APIENTRY
RegFlushKey (
IN HKEY hKey
)
/*++
Routine Description:
Win32 RPC wrapper for flushing changes to backing store.
--*/
{
LONG Error;
HKEY TempHandle = NULL;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
//
// Flush is a NO-OP for HKEY_PERFORMANCE_DATA.
//
if(( hKey == HKEY_PERFORMANCE_DATA ) ||
( hKey == HKEY_PERFORMANCE_TEXT ) ||
( hKey == HKEY_PERFORMANCE_NLSTEXT )) {
return ERROR_SUCCESS;
}
hKey = MapPredefinedHandle( hKey, &TempHandle );
if( hKey == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
if( IsLocalHandle( hKey )) {
Error = (LONG)LocalBaseRegFlushKey( hKey );
} else {
Error = (LONG)BaseRegFlushKey( DereferenceRemoteHandle( hKey ));
}
ExitCleanup:
CLOSE_LOCAL_HANDLE(TempHandle);
return Error;
}
LONG
APIENTRY
RegOpenKeyA (
HKEY hKey,
LPCSTR lpSubKey,
PHKEY phkResult
)
/*++
Routine Description:
Win 3.1 ANSI RPC wrapper for opening an existing key.
--*/
{
LONG Error;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
//
// Win3.1ism - Win 3.1 allows the predefined handle to be opened by
// specifying a pointer to an empty or NULL string for the sub-key.
//
//
// If the subkey is NULL or points to a NUL string and the handle is
// predefined, just return the predefined handle (a virtual open)
// otherwise return the same handle that was passed in.
//
if(( lpSubKey == NULL ) || ( *lpSubKey == '\0' )) {
if( !IsPredefinedRegistryHandle( hKey )) {
*phkResult = hKey;
return ERROR_SUCCESS;
}
/*
if( IsPredefinedRegistryHandle( hKey )) {
*phkResult = hKey;
return ERROR_SUCCESS;
} else {
return ERROR_BADKEY;
}
*/
}
Error = (LONG)RegOpenKeyExA(
hKey,
lpSubKey,
REG_OPTION_RESERVED,
WIN31_REGSAM,
phkResult
);
return Error;
}
LONG
APIENTRY
RegOpenKeyW (
HKEY hKey,
LPCWSTR lpSubKey,
PHKEY phkResult
)
/*++
Routine Description:
Win 3.1 Unicode RPC wrapper for opening an existing key.
--*/
{
LONG Error;
#if DBG
if ( BreakPointOnEntry ) {
OutputDebugString( "In RegOpenKeyW\n" );
DbgBreakPoint();
}
#endif
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
//
// Win3.1ism - Win 3.1 allows the predefined handle to be opened by
// specifying a pointer to an empty or NULL string for the sub-key.
//
//
// If the subkey is NULL or points to a NUL string and the handle is
// predefined, just return the predefined handle (a virtual open)
// otherwise return the handle passed in.
//
if(( lpSubKey == NULL ) || ( *lpSubKey == '\0' )) {
if( !IsPredefinedRegistryHandle( hKey )) {
*phkResult = hKey;
return ERROR_SUCCESS;
}
/*
if( IsPredefinedRegistryHandle( hKey )) {
*phkResult = hKey;
return ERROR_SUCCESS;
} else {
return ERROR_BADKEY;
}
*/
}
Error = (LONG)RegOpenKeyExW(
hKey,
lpSubKey,
REG_OPTION_RESERVED,
WIN31_REGSAM,
phkResult
);
return Error;
}
LONG
APIENTRY
RegOpenKeyExA (
HKEY hKey,
LPCSTR lpSubKey,
DWORD dwOptions,
REGSAM samDesired,
PHKEY phkResult
)
/*++
Routine Description:
Win32 ANSI RPC wrapper for opening an existing key.
RegOpenKeyExA converts the lpSubKey argument to a counted Unicode string
and then calls BaseRegOpenKey.
--*/
{
UNICODE_STRING SubKey;
NTSTATUS Status;
LONG Error;
CHAR NullString;
HKEY TempHandle = NULL;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
//
// Limit the capabilities associated with HKEY_PERFORMANCE_DATA.
//
if(( hKey == HKEY_PERFORMANCE_DATA ) ||
( hKey == HKEY_PERFORMANCE_TEXT ) ||
( hKey == HKEY_PERFORMANCE_NLSTEXT )) {
return ERROR_INVALID_HANDLE;
}
//
// Caller must pass pointer to the variable where the opened handle
// will be returned
//
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
//
// If lpSubKey is NULL, then assume NUL-string as subkey name
//
if( lpSubKey == NULL ) {
NullString = ( CHAR )'\0';
lpSubKey = &NullString;
}
//
// If hKey is a predefined key, and lpSubKey is either a NULL pointer or
// a NUL string, close the predefined key and clear the associated entry
// in the PredefinedHandleTable (RegCloseKey will do the job).
//
if( IsPredefinedRegistryHandle( hKey ) && (!( samDesired & KEY_WOW64_RES )) &&
( ( lpSubKey == NULL ) || ( *lpSubKey == '\0' ) ) ) {
if ( HKEY_CLASSES_ROOT != hKey ) {
Error = RegCloseKey( hKey );
if( Error != ERROR_SUCCESS ) {
return( Error );
}
//
// Create a handle and save it in the appropriate entry in
// PredefinedHandleTable.
// Notice that the client will be impersonated.
// (MapPredefinedHandle will do all this stuff).
//
if( MapPredefinedHandle( hKey, &TempHandle ) == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
}
//
// Return to the user the handle passed in
//
*phkResult = hKey;
Error = ERROR_SUCCESS;
goto ExitCleanup;
}
//
// Validate that the sub key is not NULL.
//
ASSERT( lpSubKey != NULL );
if( ! lpSubKey ) {
Error = ERROR_BADKEY;
goto ExitCleanup;
}
hKey = MapPredefinedHandle( hKey, &TempHandle );
if( hKey == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
//
// Convert the subkey to a counted Unicode string
//
if( !RtlCreateUnicodeStringFromAsciiz(&SubKey,lpSubKey) ) {
Status = STATUS_NO_MEMORY;
Error = RtlNtStatusToDosError( Status );
goto ExitCleanup;
}
//
// Add terminating NULL to Length so that RPC transmits it.
//
SubKey.Length += sizeof( UNICODE_NULL );
//
// Call the Base API, passing it the supplied parameters and the
// counted Unicode strings.
//
if( IsLocalHandle( hKey )) {
#if defined(_WIN64)
//
// if wow64 reserve field is set in the access mask, call
// wow64 function to handle the scenario.
//
if ( samDesired & KEY_WOW64_RES ) {
Error = (LONG)Wow64RegOpenKeyEx (
hKey,
SubKey.Buffer,
dwOptions,
samDesired,
phkResult
);
} else
#endif
Error = (LONG)LocalBaseRegOpenKey (
hKey,
&SubKey,
dwOptions,
samDesired,
phkResult
);
} else {
Error = (LONG)BaseRegOpenKey (
DereferenceRemoteHandle( hKey ),
&SubKey,
dwOptions,
samDesired,
phkResult
);
if( Error == ERROR_SUCCESS) {
TagRemoteHandle( phkResult );
}
}
// free the allocated unicode string
RtlFreeUnicodeString( &SubKey );
ExitCleanup:
CLOSE_LOCAL_HANDLE(TempHandle);
return Error;
}
LONG
APIENTRY
RegOpenKeyExW (
HKEY hKey,
LPCWSTR lpSubKey,
DWORD dwOptions,
REGSAM samDesired,
PHKEY phkResult
)
/*++
Routine Description:
Win32 Unicode RPC wrapper for opening an existing key.
RegOpenKeyExW converts the lpSubKey argument to a counted Unicode string
and then calls BaseRegOpenKey.
--*/
{
UNICODE_STRING SubKey;
LONG Error;
WCHAR NullString;
HKEY TempHandle = NULL;
NTSTATUS Status;
#if DBG
if ( BreakPointOnEntry ) {
DbgBreakPoint();
}
#endif
//
// Limit the capabilities associated with HKEY_PERFORMANCE_DATA.
//
if(( hKey == HKEY_PERFORMANCE_DATA ) ||
( hKey == HKEY_PERFORMANCE_TEXT ) ||
( hKey == HKEY_PERFORMANCE_NLSTEXT )) {
return ERROR_INVALID_HANDLE;
}
//
// Caller must pass pointer to the variable where the opened handle
// will be returned
//
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
//
// If lpSubKey is NULL, then assume NUL-string as subkey name
//
if( lpSubKey == NULL ) {
NullString = UNICODE_NULL;
lpSubKey = &NullString;
}
//
// If hKey is a predefined key, and lpSubKey is either a NULL pointer or
// a NUL string, close the predefined key and clear the associated entry
// in the PredefinedHandleTable (RegCloseKey will do the job).
//
if( IsPredefinedRegistryHandle( hKey ) && (!( samDesired & KEY_WOW64_RES )) &&
( ( lpSubKey == NULL ) || ( *lpSubKey == ( WCHAR )'\0' ) ) ) {
if ( HKEY_CLASSES_ROOT != hKey ) {
Error = RegCloseKey( hKey );
if( Error != ERROR_SUCCESS ) {
return( Error );
}
//
// Create a handle and save it in the appropriate entry in
// PredefinedHandleTable.
// Notice that the client will be impersonated.
// (MapPredefinedHandle will do all this stuff).
//
if( MapPredefinedHandle( hKey, &TempHandle ) == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
}
//
// Return to the user the handle passed in
//
*phkResult = hKey;
Error = ERROR_SUCCESS;
goto ExitCleanup;
}
//
// Validate that the sub key is not NULL.
//
ASSERT( lpSubKey != NULL );
if( ! lpSubKey ) {
Error = ERROR_BADKEY;
goto ExitCleanup;
}
hKey = MapPredefinedHandle( hKey, &TempHandle );
if( hKey == NULL ) {
Error = ERROR_INVALID_HANDLE;
goto ExitCleanup;
}
//
// Convert the subkey to a counted Unicode string.
// This also acounts for the NULL we are adding at the end
//
Status = RtlInitUnicodeStringEx(&SubKey, lpSubKey);
if( !NT_SUCCESS(Status) ) {
Error = RtlNtStatusToDosError( Status );
goto ExitCleanup;
}
//
// Add terminating NULL to Length so that RPC transmits it
//
SubKey.Length += sizeof (UNICODE_NULL );
//
// Call the Base API, passing it the supplied parameters and the
// counted Unicode strings.
//
if( IsLocalHandle( hKey )) {
#if defined(_WIN64)
//
// if wow64 reserve field is set in the access mask, call
// wow64 function to handle the scenario.
//
if ( samDesired & KEY_WOW64_RES ) {
Error = (LONG)Wow64RegOpenKeyEx (
hKey,
SubKey.Buffer,
dwOptions,
samDesired,
phkResult
);
} else
#endif
Error = (LONG)LocalBaseRegOpenKey (
hKey,
&SubKey,
dwOptions,
samDesired,
phkResult
);
} else {
Error = (LONG)BaseRegOpenKey (
DereferenceRemoteHandle( hKey ),
&SubKey,
dwOptions,
samDesired,
phkResult
);
if( Error == ERROR_SUCCESS) {
TagRemoteHandle( phkResult );
}
}
ExitCleanup:
CLOSE_LOCAL_HANDLE(TempHandle);
return Error;
}
LONG
APIENTRY
RegOpenCurrentUser(
REGSAM samDesired,
PHKEY phkResult
)
/*++
Routine Description:
Win32 Client-Only function to open the key for HKEY_CURRENT_USER
for the user that the thread is currently impersonating. Since
HKEY_CURRENT_USER is cached for all threads in a process, if the
process is impersonating multiple users, this allows access to
the appropriate key.
Arguments:
samDesired - Supplies the requested security access mask.
phkResult - Returns an open handle to the key.
Return Value:
Returns 0 (ERROR_SUCCESS) for success, otherwise a windows error code.
--*/
{
NTSTATUS Status ;
if( phkResult == NULL ) {
return ERROR_INVALID_PARAMETER;
}
Status = RtlOpenCurrentUser( samDesired, phkResult );
#if defined(LEAK_TRACK)
if (NT_SUCCESS(Status)) {
if (g_RegLeakTraceInfo.bEnableLeakTrack) {
(void) TrackObject(*phkResult);
}
}
#endif // (LEAK_TRACK)
return RtlNtStatusToDosError( Status );
}
LONG
APIENTRY
RegDisablePredefinedCache(
)
/*++
Routine Description:
Win32 Client-Only function to disable the predefined handle table
for HKEY_CURRENT_USER for the calling process
All references to HKEY_CURRENT_USER after this function is called
will result in a open/close on HKU\<sid>
Arguments:
Return Value:
Returns 0 (ERROR_SUCCESS) for success, otherwise a windows error code.
--*/
{
NTSTATUS Status ;
Status = DisablePredefinedHandleTable( HKEY_CURRENT_USER );
return RtlNtStatusToDosError( Status );
}