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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
Regsrkey.c
Abstract:
This module contains the save\restore key APIs, that is:
- RegRestoreKeyW - RegSaveKeyW
Author:
David J. Gilman (davegi) 23-Jan-1992
Notes:
Revision History:
25-Mar-1992 Ramon J. San Andres (ramonsa) Changed to use RPC.
--*/
#include <rpc.h>
#include "regrpc.h"
#include "localreg.h"
#ifdef LOCAL
#include "tsappcmp.h"
#include "regclass.h"
#endif
error_status_tBaseRegRestoreKey( IN HKEY hKey, IN PUNICODE_STRING lpFile, IN DWORD dwFlags )
/*++
Routine Description:
Restore the tree in the supplied file onto the key referenced by the supplied key handle. The restored tree will overwrite all of the contents of the supplied hKey except for its name. Pictorially, if the file contains:
A / \ / \ B C
and the supplied key refers to a key name X, the resultant tree would look like:
X / \ / \ B C
Arguments:
hKey - Supplies a handle to the key where the file is to be restored.
lpFile - Supplies a pointer to an existing file name whose contents was created with RegSaveKey.
dwFlags - Supplies an optional flag argument which can be:
- REG_WHOLE_HIVE_VOLATILE
If specified this flag causes a new, volatile (i.e. memory only) hive to be created. In this case the hKey can only refer to a child of HKEY_USERS or HKEY_LOCAL_MACHINE.
If not specified, hKey can refer to any key in the Registry.
Return Value:
Returns ERROR_SUCCESS (0) for success; error-code for failure.
--*/
{ UNICODE_STRING FileName; RTL_RELATIVE_NAME_U RelativeName; OBJECT_ATTRIBUTES Obja; IO_STATUS_BLOCK IoStatusBlock; PVOID FreeBuffer; BOOLEAN ErrorFlag; NTSTATUS NtStatus; NTSTATUS NtStatus1; HANDLE Handle;
ASSERT( (hKey != NULL) && (lpFile != NULL) && (lpFile->Buffer != NULL)); if ( (hKey == NULL) || (lpFile == NULL) || (lpFile->Buffer == NULL) || (lpFile->Length & 1)) { return ERROR_INVALID_PARAMETER; }
RPC_IMPERSONATE_CLIENT( NULL );
//
// Remove the NULL from the Length. This was added by the client
// so that RPC would transmit the entire thing.
//
if ( lpFile->Length > 0 ) { lpFile->Length -= sizeof( UNICODE_NULL ); }
//
// Convert the DOS path name to a canonical Nt path name.
//
ErrorFlag = RtlDosPathNameToRelativeNtPathName_U( lpFile->Buffer, &FileName, NULL, &RelativeName );
//
// If the name was not succesfully converted assume it was invalid.
//
if ( !ErrorFlag ) { RPC_REVERT_TO_SELF(); return ERROR_INVALID_PARAMETER; }
//
// Remember the buffer allocated by RtlDosPathNameToRelativeNtPathName_U.
//
FreeBuffer = FileName.Buffer;
//
// If a relative name and directory handle will work, use those.
//
if ( RelativeName.RelativeName.Length ) {
//
// Replace the full path with the relative path.
//
FileName = RelativeName.RelativeName;
} else {
//
// Using the full path - no containing directory.
//
RelativeName.ContainingDirectory = NULL; }
//
// Initialize the Obja structure for the save file.
//
InitializeObjectAttributes( &Obja, &FileName, OBJ_CASE_INSENSITIVE, RelativeName.ContainingDirectory, NULL );
//
// Open the existing file.
//
NtStatus = NtOpenFile( &Handle, GENERIC_READ | SYNCHRONIZE, &Obja, &IoStatusBlock, FILE_SHARE_READ, FILE_SYNCHRONOUS_IO_NONALERT );
//
// Free the buffer allocated by RtlDosPathNameToRelativeNtPathName_U.
//
RtlReleaseRelativeName(&RelativeName); RtlFreeHeap( RtlProcessHeap( ), 0, FreeBuffer );
//
// Check the results of the NtOpenFile.
//
if( NT_SUCCESS( NtStatus )) {
#ifdef LOCAL
if (REG_CLASS_IS_SPECIAL_KEY(hKey)) {
HKEY hkRestoreKey; UNICODE_STRING EmptyString = {0, 0, NULL};
//
// We need to restore to to user if it exists,
// machine if not
//
NtStatus = BaseRegOpenClassKey( hKey, &EmptyString, 0, MAXIMUM_ALLOWED, &hkRestoreKey); if (NT_SUCCESS(NtStatus)) {
//
// Now restore to the highest precedence key
//
NtStatus = NtRestoreKey( hkRestoreKey, Handle, dwFlags );
NtClose(hkRestoreKey); } } else { //
// If this isn't in hkcr, then just restore to the supplied object
//
NtStatus = NtRestoreKey( hKey, Handle, dwFlags ); }
#else // LOCAL
//
// Now call the NT API
//
NtStatus = NtRestoreKey( hKey, Handle, dwFlags );#endif // LOCAL
//
// Close the file.
//
NtStatus1 = NtClose(Handle); ASSERT( NT_SUCCESS( NtStatus1 ));
}
RPC_REVERT_TO_SELF();
#ifdef LOCAL
if (NT_SUCCESS(NtStatus) && !(dwFlags & REG_WHOLE_HIVE_VOLATILE) && gpfnTermsrvRestoreKey) { gpfnTermsrvRestoreKey(hKey, Handle, dwFlags); }#endif
//
// Map the result of NtRestoreKey and return.
//
return (error_status_t)RtlNtStatusToDosError( NtStatus );}
error_status_tBaseRegSaveKey( IN HKEY hKey, IN PUNICODE_STRING lpFile, IN PRPC_SECURITY_ATTRIBUTES pRpcSecurityAttributes OPTIONAL )/*++
Routine Description:
Saves the given key to the specified file.
Arguments:
hKey - Supplies a handle to the open key.
lpFile - Supplies the name of the file to save the key to.
pRpcSecurityAttributes - Supplies the security attributes of the file.
Return Value:
Returns ERROR_SUCCESS (0) for success; error-code for failure.
--*/{
BOOLEAN ErrorFlag; UNICODE_STRING FileName; RTL_RELATIVE_NAME_U RelativeName; OBJECT_ATTRIBUTES Obja; IO_STATUS_BLOCK IoStatusBlock; PVOID FreeBuffer; NTSTATUS NtStatus; NTSTATUS NtStatus1; HANDLE Handle;
ASSERT( (hKey != NULL) && (lpFile != NULL) && (lpFile->Buffer != NULL)); if ( (hKey == NULL) || (lpFile == NULL) || (lpFile->Buffer == NULL) || (lpFile->Length & 1) ) { return ERROR_INVALID_PARAMETER; }
RPC_IMPERSONATE_CLIENT( NULL );
//
// Remove the NULL from the Length. This was added by the client
// so that RPC would transmit the entire thing.
//
if ( lpFile->Length > 0 ) { lpFile->Length -= sizeof( UNICODE_NULL ); }
if ( ARGUMENT_PRESENT( pRpcSecurityAttributes ) ) { if( (pRpcSecurityAttributes->RpcSecurityDescriptor.lpSecurityDescriptor == NULL) || (!RtlValidRelativeSecurityDescriptor( pRpcSecurityAttributes->RpcSecurityDescriptor.lpSecurityDescriptor, pRpcSecurityAttributes->RpcSecurityDescriptor.cbInSecurityDescriptor, 0)) ) { RPC_REVERT_TO_SELF(); return ERROR_INVALID_PARAMETER; } } //
// Convert the DOS path name to a canonical Nt path name.
//
ErrorFlag = RtlDosPathNameToRelativeNtPathName_U( lpFile->Buffer, &FileName, NULL, &RelativeName );
//
// If the name was not succesfully converted assume it was invalid.
//
if( ! ErrorFlag ) { RPC_REVERT_TO_SELF(); return ERROR_INVALID_PARAMETER; }
//
// Remember the buffer allocatted by RtlDosPathNameToRelativeNtPathName_U.
//
FreeBuffer = FileName.Buffer;
//
// If a relative name and directory handle will work, use those.
//
if ( RelativeName.RelativeName.Length ) {
//
// Replace the full path with the relative path.
//
FileName = RelativeName.RelativeName;
} else {
//
// Using the full path - no containing directory.
//
RelativeName.ContainingDirectory = NULL; } //
// Initialize the Obja structure for the save file.
//
InitializeObjectAttributes( &Obja, &FileName, OBJ_CASE_INSENSITIVE, RelativeName.ContainingDirectory, ARGUMENT_PRESENT( pRpcSecurityAttributes ) ? pRpcSecurityAttributes ->RpcSecurityDescriptor.lpSecurityDescriptor : NULL );
//
// Create the file - fail if the file exists.
//
NtStatus = NtCreateFile( &Handle, GENERIC_WRITE | SYNCHRONIZE, &Obja, &IoStatusBlock, NULL, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ, FILE_CREATE, FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_FOR_BACKUP_INTENT, NULL, 0 );
//
// Free the buffer allocated by RtlDosPathNameToRelativeNtPathName_U.
//
RtlReleaseRelativeName(&RelativeName); RtlFreeHeap( RtlProcessHeap( ), 0, FreeBuffer );
//
// Check the results of the NtCreateFile.
//
if ( NT_SUCCESS( NtStatus )) {
#ifdef LOCAL
if (REG_CLASS_IS_SPECIAL_KEY(hKey)) {
HKEY hkMachineClass; HKEY hkUserClass;
NtStatus = BaseRegGetUserAndMachineClass( NULL, hKey, MAXIMUM_ALLOWED, &hkMachineClass, &hkUserClass);
if (NT_SUCCESS(NtStatus)) {
//
// We only need to merge keys if we have
// more than one key
//
if (hkMachineClass && hkUserClass) { NtStatus = NtSaveMergedKeys( hkUserClass, hkMachineClass, Handle);
//
// Clean up the extra handle we opened
//
if (hkUserClass != hKey) { NtClose(hkUserClass); } else { NtClose(hkMachineClass); }
} else { //
// If there's only one key, use the regular
// api
//
NtStatus = NtSaveKey( hKey, Handle ); } } } else { //
// If this isn't in hkcr, just save the regular way
//
NtStatus = NtSaveKey( hKey, Handle ); }#else // LOCAL
NtStatus = NtSaveKey( hKey, Handle );#endif // LOCAL
//
// Close the file.
//
NtStatus1 = NtClose( Handle ); ASSERT( NT_SUCCESS( NtStatus1 ));
}
RPC_REVERT_TO_SELF();
//
// Map the result of NtSaveKey and return.
//
return (error_status_t)RtlNtStatusToDosError( NtStatus );}
error_status_tBaseRegSaveKeyEx( IN HKEY hKey, IN PUNICODE_STRING lpFile, IN PRPC_SECURITY_ATTRIBUTES pRpcSecurityAttributes OPTIONAL, IN DWORD Flags )/*++
Routine Description:
Saves the given key to the specified file.
Arguments:
hKey - Supplies a handle to the open key.
lpFile - Supplies the name of the file to save the key to.
pRpcSecurityAttributes - Supplies the security attributes of the file.
Flags - Specifies the format the target registry hive will be saved on.
Return Value:
Returns ERROR_SUCCESS (0) for success; error-code for failure.
--*/{
BOOLEAN ErrorFlag; UNICODE_STRING FileName; RTL_RELATIVE_NAME_U RelativeName; OBJECT_ATTRIBUTES Obja; IO_STATUS_BLOCK IoStatusBlock; PVOID FreeBuffer; NTSTATUS NtStatus; NTSTATUS NtStatus1; HANDLE Handle;
ASSERT( (hKey != NULL) && (lpFile != NULL) && (lpFile->Buffer != NULL)); if ( (hKey == NULL) || (lpFile == NULL) || (lpFile->Buffer == NULL) || (lpFile->Length & 1) ) { return ERROR_INVALID_PARAMETER; }
RPC_IMPERSONATE_CLIENT( NULL );
//
// Remove the NULL from the Length. This was added by the client
// so that RPC would transmit the entire thing.
//
if ( lpFile->Length > 0 ) { lpFile->Length -= sizeof( UNICODE_NULL ); }
if ( ARGUMENT_PRESENT( pRpcSecurityAttributes ) ) { if( (pRpcSecurityAttributes->RpcSecurityDescriptor.lpSecurityDescriptor == NULL) || (!RtlValidRelativeSecurityDescriptor( pRpcSecurityAttributes->RpcSecurityDescriptor.lpSecurityDescriptor, pRpcSecurityAttributes->RpcSecurityDescriptor.cbInSecurityDescriptor, 0)) ) { RPC_REVERT_TO_SELF(); return ERROR_INVALID_PARAMETER; } } //
// Convert the DOS path name to a canonical Nt path name.
//
ErrorFlag = RtlDosPathNameToRelativeNtPathName_U( lpFile->Buffer, &FileName, NULL, &RelativeName );
//
// If the name was not succesfully converted assume it was invalid.
//
if( ! ErrorFlag ) { RPC_REVERT_TO_SELF(); return ERROR_INVALID_PARAMETER; }
//
// Remember the buffer allocatted by RtlDosPathNameToRelativeNtPathName_U.
//
FreeBuffer = FileName.Buffer;
//
// If a relative name and directory handle will work, use those.
//
if ( RelativeName.RelativeName.Length ) {
//
// Replace the full path with the relative path.
//
FileName = RelativeName.RelativeName;
} else {
//
// Using the full path - no containing directory.
//
RelativeName.ContainingDirectory = NULL; }
//
// Initialize the Obja structure for the save file.
//
InitializeObjectAttributes( &Obja, &FileName, OBJ_CASE_INSENSITIVE, RelativeName.ContainingDirectory, ARGUMENT_PRESENT( pRpcSecurityAttributes ) ? pRpcSecurityAttributes ->RpcSecurityDescriptor.lpSecurityDescriptor : NULL );
//
// Create the file - fail if the file exists.
//
NtStatus = NtCreateFile( &Handle, GENERIC_WRITE | SYNCHRONIZE, &Obja, &IoStatusBlock, NULL, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ, FILE_CREATE, FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_FOR_BACKUP_INTENT, NULL, 0 );
//
// Free the buffer allocated by RtlDosPathNameToRelativeNtPathName_U.
//
RtlReleaseRelativeName(&RelativeName); RtlFreeHeap( RtlProcessHeap( ), 0, FreeBuffer );
//
// Check the results of the NtCreateFile.
//
if ( NT_SUCCESS( NtStatus )) {
#ifdef LOCAL
if (REG_CLASS_IS_SPECIAL_KEY(hKey)) { //
// not supported on merged hives just yet
//
NtStatus = STATUS_INVALID_PARAMETER; } else { //
// If this isn't in hkcr, just save the regular way
//
NtStatus = NtSaveKeyEx( hKey, Handle, Flags ); }#else // LOCAL
NtStatus = NtSaveKeyEx( hKey, Handle, Flags );#endif // LOCAL
//
// Close the file.
//
NtStatus1 = NtClose( Handle ); ASSERT( NT_SUCCESS( NtStatus1 ));
}
RPC_REVERT_TO_SELF();
//
// Map the result of NtSaveKey and return.
//
return (error_status_t)RtlNtStatusToDosError( NtStatus );}
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