513 lines
14 KiB
C
513 lines
14 KiB
C
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/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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Regqkey.c
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Abstract:
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This module contains the client side wrappers for the Win32 Registry
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query key APIs. That is:
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- RegQueryInfoKeyA
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- RegQueryInfoKeyW
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Author:
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David J. Gilman (davegi) 18-Mar-1992
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Notes:
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See the notes in server\regqkey.c.
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--*/
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#include <rpc.h>
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#include "regrpc.h"
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#include "client.h"
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LONG
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RegQueryInfoKeyA (
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HKEY hKey,
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LPSTR lpClass,
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LPDWORD lpcbClass,
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LPDWORD lpReserved,
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LPDWORD lpcSubKeys,
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LPDWORD lpcbMaxSubKeyLen,
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LPDWORD lpcbMaxClassLen,
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LPDWORD lpcValues,
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LPDWORD lpcbMaxValueNameLen,
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LPDWORD lpcbMaxValueLen,
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LPDWORD lpcbSecurityDescriptor,
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PFILETIME lpftLastWriteTime
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)
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/*++
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Routine Description:
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Win32 ANSI RPC wrapper for querying information about a previously
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opened key.
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--*/
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{
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PUNICODE_STRING Class;
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UNICODE_STRING UnicodeString;
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ANSI_STRING AnsiString;
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NTSTATUS Status;
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LONG Error;
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DWORD cSubKeys;
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DWORD cbMaxSubKeyLen;
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DWORD cValues;
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DWORD cbMaxValueNameLen;
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DWORD cbMaxValueLen;
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FILETIME ftLastWriteTime;
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HKEY TempHandle = NULL;
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DWORD cbMaxClassLen;
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DWORD cbSecurityDescriptor;
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PDWORD pCbMaxClassLen = NULL;
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PDWORD pCbSecurityDescriptor = NULL;
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#if DBG
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if ( BreakPointOnEntry ) {
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DbgBreakPoint();
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}
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#endif
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if( ARGUMENT_PRESENT( lpReserved ) ||
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(ARGUMENT_PRESENT( lpClass ) && ( ! ARGUMENT_PRESENT( lpcbClass )))) {
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return ERROR_INVALID_PARAMETER;
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}
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hKey = MapPredefinedHandle( hKey, &TempHandle );
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if( hKey == NULL ) {
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Error = ERROR_INVALID_HANDLE;
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goto ExitCleanup;
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}
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//
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// Make sure that the buffer size for lpClass is zero if lpClass is NULL
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//
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if( !ARGUMENT_PRESENT( lpClass ) && ARGUMENT_PRESENT( lpcbClass ) ) {
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*lpcbClass = 0;
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}
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if( ARGUMENT_PRESENT( lpcbMaxClassLen ) ) {
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pCbMaxClassLen = &cbMaxClassLen;
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}
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if( ARGUMENT_PRESENT( lpcbSecurityDescriptor ) ) {
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pCbSecurityDescriptor = &cbSecurityDescriptor;
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}
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//
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// If the count of bytes in the class is 0, pass a NULL pointer
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// instead of what was supplied. This ensures that RPC won't
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// attempt to copy data to a bogus pointer. Note that in this
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// case we use the unicode string allocated on the stack, because
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// we must not change the Buffer or MaximumLength fields of the
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// static unicode string in the TEB.
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//
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if ( !ARGUMENT_PRESENT( lpClass ) || *lpcbClass == 0 ) {
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Class = &UnicodeString;
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Class->Length = 0;
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Class->MaximumLength = 0;
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Class->Buffer = NULL;
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} else {
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//
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// Use the static Unicode string in the TEB as a temporary for the
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// key's class.
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//
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Class = &NtCurrentTeb( )->StaticUnicodeString;
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ASSERT( Class != NULL );
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Class->Length = 0;
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}
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//
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// Call the Base API passing it a pointer to a counted Unicode string
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// for the class string.
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//
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if( IsLocalHandle( hKey )) {
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Error = (LONG)LocalBaseRegQueryInfoKey(
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hKey,
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Class,
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&cSubKeys,
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&cbMaxSubKeyLen,
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pCbMaxClassLen,
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&cValues,
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&cbMaxValueNameLen,
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&cbMaxValueLen,
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pCbSecurityDescriptor,
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&ftLastWriteTime
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);
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} else {
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//
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// on RPC always send valid pointers!!!
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//
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pCbMaxClassLen = &cbMaxClassLen;
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pCbSecurityDescriptor = &cbSecurityDescriptor;
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Error = (LONG)BaseRegQueryInfoKey(
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DereferenceRemoteHandle( hKey ),
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Class,
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&cSubKeys,
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&cbMaxSubKeyLen,
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pCbMaxClassLen,
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&cValues,
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&cbMaxValueNameLen,
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&cbMaxValueLen,
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pCbSecurityDescriptor,
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&ftLastWriteTime
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);
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if (Error == ERROR_SUCCESS) {
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DWORD dwVersion;
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//
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// Check for a downlevel Win95 server, which requires
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// us to work around their BaseRegQueryInfoKey bugs.
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// They do not account for Unicode correctly.
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//
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if (IsWin95Server(DereferenceRemoteHandle(hKey),dwVersion)) {
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//
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// This is a Win95 server.
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// Double the maximum value name length and
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// maximum value data length to account for
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// the Unicode translation that Win95 forgot
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// to account for.
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//
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cbMaxValueNameLen *= sizeof(WCHAR);
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cbMaxValueLen *= sizeof(WCHAR);
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}
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}
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}
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//
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// MaxSubKeyLen, MaxClassLen, and MaxValueNameLen should be in
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// number of characters, without counting the NULL.
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// Note that the server side will return the number of bytes,
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// without counting the NUL
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//
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cbMaxSubKeyLen /= sizeof( WCHAR );
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if( pCbMaxClassLen != NULL ) {
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cbMaxClassLen /= sizeof( WCHAR );
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ASSERT( *pCbMaxClassLen == cbMaxClassLen );
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}
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cbMaxValueNameLen /= sizeof( WCHAR );
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//
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// Subtract the NULL from the Length. This was added on
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// the server side so that RPC would transmit it.
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//
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if ( Class->Length > 0 ) {
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Class->Length -= sizeof( UNICODE_NULL );
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}
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//
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// If all the information was succesfully queried from the key
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// convert the class name to ANSI and update the class length value.
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//
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if( ( Error == ERROR_SUCCESS ) &&
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ARGUMENT_PRESENT( lpClass ) && ( *lpcbClass != 0 ) ) {
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if (*lpcbClass > (DWORD)0xFFFF) {
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AnsiString.MaximumLength = ( USHORT ) 0xFFFF;
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} else {
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AnsiString.MaximumLength = ( USHORT ) *lpcbClass;
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}
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AnsiString.Buffer = lpClass;
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Status = RtlUnicodeStringToAnsiString(
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&AnsiString,
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Class,
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FALSE
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);
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ASSERTMSG( "Unicode->ANSI conversion of Class ",
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NT_SUCCESS( Status ));
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//
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// Update the class length return parameter.
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//
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*lpcbClass = AnsiString.Length;
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Error = RtlNtStatusToDosError( Status );
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} else {
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//
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// Not all of the information was succesfully queried, or Class
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// doesn't have to be converted from UNICODE to ANSI
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//
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if( ARGUMENT_PRESENT( lpcbClass ) ) {
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if( Class->Length == 0 ) {
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*lpcbClass = 0;
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} else {
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*lpcbClass = ( Class->Length >> 1 );
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}
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}
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}
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if( ARGUMENT_PRESENT( lpcSubKeys ) ) {
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*lpcSubKeys = cSubKeys;
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}
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if( ARGUMENT_PRESENT( lpcbMaxSubKeyLen ) ) {
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*lpcbMaxSubKeyLen = cbMaxSubKeyLen;
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}
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if( ARGUMENT_PRESENT( lpcbMaxClassLen ) ) {
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*lpcbMaxClassLen = cbMaxClassLen;
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ASSERT( *pCbMaxClassLen == cbMaxClassLen );
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}
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if( ARGUMENT_PRESENT( lpcValues ) ) {
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*lpcValues = cValues;
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}
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if( ARGUMENT_PRESENT( lpcbMaxValueNameLen ) ) {
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*lpcbMaxValueNameLen = cbMaxValueNameLen;
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}
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if( ARGUMENT_PRESENT( lpcbMaxValueLen ) ) {
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*lpcbMaxValueLen = cbMaxValueLen;
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}
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if( ARGUMENT_PRESENT( lpcbSecurityDescriptor ) ) {
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*lpcbSecurityDescriptor = cbSecurityDescriptor;
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ASSERT( *pCbSecurityDescriptor == cbSecurityDescriptor );
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}
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if( ARGUMENT_PRESENT( lpftLastWriteTime ) ) {
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*lpftLastWriteTime = ftLastWriteTime;
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}
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ExitCleanup:
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CLOSE_LOCAL_HANDLE(TempHandle);
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return Error;
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}
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LONG
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RegQueryInfoKeyW (
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HKEY hKey,
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LPWSTR lpClass,
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LPDWORD lpcbClass,
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LPDWORD lpReserved,
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LPDWORD lpcSubKeys,
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LPDWORD lpcbMaxSubKeyLen,
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LPDWORD lpcbMaxClassLen,
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LPDWORD lpcValues,
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LPDWORD lpcbMaxValueNameLen,
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LPDWORD lpcbMaxValueLen,
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LPDWORD lpcbSecurityDescriptor,
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PFILETIME lpftLastWriteTime
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)
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/*++
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|||
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|
|||
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Routine Description:
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|||
|
|
|
|||
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Win32 Unicode RPC wrapper for querying information about a previously
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opened key.
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|||
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|||
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--*/
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{
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UNICODE_STRING Class;
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LONG Error;
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DWORD cbClass;
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DWORD cSubKeys;
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DWORD cbMaxSubKeyLen;
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DWORD cValues;
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DWORD cbMaxValueNameLen;
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DWORD cbMaxValueLen;
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FILETIME ftLastWriteTime;
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HKEY TempHandle = NULL;
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DWORD cbMaxClassLen;
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DWORD cbSecurityDescriptor;
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PDWORD pCbMaxClassLen = NULL;
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PDWORD pCbSecurityDescriptor = NULL;
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#if DBG
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if ( BreakPointOnEntry ) {
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DbgBreakPoint();
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}
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#endif
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if( ARGUMENT_PRESENT( lpReserved ) ||
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(ARGUMENT_PRESENT( lpClass ) && ( ! ARGUMENT_PRESENT( lpcbClass )))) {
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return ERROR_INVALID_PARAMETER;
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}
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hKey = MapPredefinedHandle( hKey, &TempHandle );
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if( hKey == NULL ) {
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Error = ERROR_INVALID_HANDLE;
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goto ExitCleanup;
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}
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//
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// Make sure that the buffer size for lpClass is zero if lpClass is NULL
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//
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if( !ARGUMENT_PRESENT( lpClass ) && ARGUMENT_PRESENT( lpcbClass ) ) {
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*lpcbClass = 0;
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}
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if( ARGUMENT_PRESENT( lpcbMaxClassLen ) ) {
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pCbMaxClassLen = &cbMaxClassLen;
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}
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if( ARGUMENT_PRESENT( lpcbSecurityDescriptor ) ) {
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pCbSecurityDescriptor = &cbSecurityDescriptor;
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}
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//
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// Use the supplied class Class buffer as the buffer in a counted
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|||
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// Unicode Class.
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//
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Class.Length = 0;
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if( ARGUMENT_PRESENT( lpcbClass ) && ( *lpcbClass != 0 ) ) {
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Class.MaximumLength = ( USHORT )( *lpcbClass << 1 );
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Class.Buffer = lpClass;
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|||
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} else {
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|||
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//
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|||
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// If the count of bytes in the class is 0, pass a NULL pointer
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|||
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|
// instead of what was supplied. This ensures that RPC won't
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|||
|
|
// attempt to copy data to a bogus pointer.
|
|||
|
|
//
|
|||
|
|
Class.MaximumLength = 0;
|
|||
|
|
Class.Buffer = NULL;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//
|
|||
|
|
// Call the Base API.
|
|||
|
|
//
|
|||
|
|
|
|||
|
|
if( IsLocalHandle( hKey )) {
|
|||
|
|
|
|||
|
|
Error = (LONG)LocalBaseRegQueryInfoKey(
|
|||
|
|
hKey,
|
|||
|
|
&Class,
|
|||
|
|
&cSubKeys,
|
|||
|
|
&cbMaxSubKeyLen,
|
|||
|
|
pCbMaxClassLen,
|
|||
|
|
&cValues,
|
|||
|
|
&cbMaxValueNameLen,
|
|||
|
|
&cbMaxValueLen,
|
|||
|
|
pCbSecurityDescriptor,
|
|||
|
|
&ftLastWriteTime
|
|||
|
|
);
|
|||
|
|
} else {
|
|||
|
|
//
|
|||
|
|
// on RPC always send valid pointers!!!
|
|||
|
|
//
|
|||
|
|
pCbMaxClassLen = &cbMaxClassLen;
|
|||
|
|
pCbSecurityDescriptor = &cbSecurityDescriptor;
|
|||
|
|
|
|||
|
|
Error = (LONG)BaseRegQueryInfoKey(
|
|||
|
|
DereferenceRemoteHandle( hKey ),
|
|||
|
|
&Class,
|
|||
|
|
&cSubKeys,
|
|||
|
|
&cbMaxSubKeyLen,
|
|||
|
|
pCbMaxClassLen,
|
|||
|
|
&cValues,
|
|||
|
|
&cbMaxValueNameLen,
|
|||
|
|
&cbMaxValueLen,
|
|||
|
|
pCbSecurityDescriptor,
|
|||
|
|
&ftLastWriteTime
|
|||
|
|
);
|
|||
|
|
if (Error == ERROR_SUCCESS) {
|
|||
|
|
DWORD dwVersion;
|
|||
|
|
//
|
|||
|
|
// Check for a downlevel Win95 server, which requires
|
|||
|
|
// us to work around their BaseRegQueryInfoKey bugs.
|
|||
|
|
// They do not account for Unicode correctly.
|
|||
|
|
//
|
|||
|
|
if (IsWin95Server(DereferenceRemoteHandle(hKey),dwVersion)) {
|
|||
|
|
//
|
|||
|
|
// This is a Win95 server.
|
|||
|
|
// Double the maximum value name length and
|
|||
|
|
// maximum value data length to account for
|
|||
|
|
// the Unicode translation that Win95 forgot
|
|||
|
|
// to account for.
|
|||
|
|
//
|
|||
|
|
cbMaxValueNameLen *= sizeof(WCHAR);
|
|||
|
|
cbMaxValueLen *= sizeof(WCHAR);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
//
|
|||
|
|
// MaxSubKeyLen, MaxClassLen, and MaxValueNameLen should be in
|
|||
|
|
// number of characters, without counting the NULL.
|
|||
|
|
// Note that the server side will return the number of bytes,
|
|||
|
|
// without counting the NUL
|
|||
|
|
//
|
|||
|
|
|
|||
|
|
cbMaxSubKeyLen /= sizeof( WCHAR );
|
|||
|
|
if( pCbMaxClassLen != NULL ) {
|
|||
|
|
cbMaxClassLen /= sizeof( WCHAR );
|
|||
|
|
ASSERT( *pCbMaxClassLen == cbMaxClassLen );
|
|||
|
|
}
|
|||
|
|
cbMaxValueNameLen /= sizeof( WCHAR );
|
|||
|
|
|
|||
|
|
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbClass ) ) {
|
|||
|
|
if( Class.Length == 0 ) {
|
|||
|
|
*lpcbClass = 0;
|
|||
|
|
} else {
|
|||
|
|
*lpcbClass = ( Class.Length >> 1 ) - 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if( ARGUMENT_PRESENT( lpcSubKeys ) ) {
|
|||
|
|
*lpcSubKeys = cSubKeys;
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbMaxSubKeyLen ) ) {
|
|||
|
|
*lpcbMaxSubKeyLen = cbMaxSubKeyLen;
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbMaxClassLen ) ) {
|
|||
|
|
*lpcbMaxClassLen = cbMaxClassLen;
|
|||
|
|
ASSERT( *pCbMaxClassLen == cbMaxClassLen );
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcValues ) ) {
|
|||
|
|
*lpcValues = cValues;
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbMaxValueNameLen ) ) {
|
|||
|
|
*lpcbMaxValueNameLen = cbMaxValueNameLen;
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbMaxValueLen ) ) {
|
|||
|
|
*lpcbMaxValueLen = cbMaxValueLen;
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpcbSecurityDescriptor ) ) {
|
|||
|
|
*lpcbSecurityDescriptor = cbSecurityDescriptor;
|
|||
|
|
ASSERT( *pCbSecurityDescriptor == cbSecurityDescriptor );
|
|||
|
|
}
|
|||
|
|
if( ARGUMENT_PRESENT( lpftLastWriteTime ) ) {
|
|||
|
|
*lpftLastWriteTime = ftLastWriteTime;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
ExitCleanup:
|
|||
|
|
|
|||
|
|
CLOSE_LOCAL_HANDLE(TempHandle);
|
|||
|
|
return Error;
|
|||
|
|
}
|