Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-12-28 10:04:49 +00:00
Code Issues Projects Releases Packages Wiki Activity

Fix bugs in RegQueryValueExA() and RegQueryValueExW() that caused crashes or returned bogus

Browse source 
information if the caller wants to retrieve the value data length only.
This fixes some bugs with regedit.

svn path=/trunk/; revision=8940
This commit is contained in:
Eric Kohl 2004-04-01 13:53:08 +00:00
parent a75dfe1a82
commit a7456eb968
1 changed files with 60 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

50
reactos/lib/advapi32/reg/reg.c
View file

@ -1,4 +1,4 @@
/* $Id: reg.c,v 1.44 2004/02/25 14:25:10 ekohl Exp $
/* $Id: reg.c,v 1.45 2004/04/01 13:53:08 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
@ -2191,7 +2191,7 @@ RegQueryValueExW (HKEY hKey,
ErrorCode = RtlNtStatusToDosError (Status);
SetLastError (ErrorCode);
MaxCopy = 0;
if (NULL != lpcbData)
if (lpcbData != NULL)
{
ResultSize = sizeof(*ValueInfo) + *lpcbData;
}
@ -2202,27 +2202,35 @@ RegQueryValueExW (HKEY hKey,
*lpType = ValueInfo->Type;
}
if (NT_SUCCESS(Status))
if (NT_SUCCESS(Status) && lpData != NULL)
{
RtlMoveMemory (lpData,
ValueInfo->Data,
min(ValueInfo->DataLength,MaxCopy));
min(ValueInfo->DataLength, MaxCopy));
}
if ((ValueInfo->Type == REG_SZ) ||
(ValueInfo->Type == REG_MULTI_SZ) ||
(ValueInfo->Type == REG_EXPAND_SZ))
{
if (MaxCopy > ValueInfo->DataLength)
if (lpData != NULL && MaxCopy > ValueInfo->DataLength)
{
((PWSTR)lpData)[ValueInfo->DataLength / sizeof(WCHAR)] = 0;
}
if (lpcbData) {
if (lpcbData != NULL)
{
*lpcbData = (ResultSize - sizeof(*ValueInfo));
DPRINT("(string) Returning Size: %d\n", *lpcbData);
DPRINT("(string) Returning Size: %lu\n", *lpcbData);
}
}
else
if (lpcbData) {
{
if (lpcbData != NULL)
{
*lpcbData = ResultSize - sizeof(*ValueInfo);
DPRINT("(other) Returning Size: %d\n", *lpcbData);
DPRINT("(other) Returning Size: %lu\n", *lpcbData);
}
}
DPRINT("Type %d Size %d\n", ValueInfo->Type, ValueInfo->DataLength);
@ -2255,7 +2263,7 @@ RegQueryValueExA (HKEY hKey,
DWORD Length;
DWORD Type;
if ((lpData) && (!lpcbData))
if (lpData != NULL && lpcbData == NULL)
{
SetLastError(ERROR_INVALID_PARAMETER);
return ERROR_INVALID_PARAMETER;
@ -2284,20 +2292,26 @@ RegQueryValueExA (HKEY hKey,
RtlCreateUnicodeStringFromAsciiz (&ValueName,
(LPSTR)lpValueName);
/* Convert length from USHORT to DWORD */
Length = ValueData.Length;
Length = *lpcbData * sizeof(WCHAR);
ErrorCode = RegQueryValueExW (hKey,
ValueName.Buffer,
lpReserved,
&Type,
(LPBYTE)ValueData.Buffer,
&Length);
if (lpType != NULL)
*lpType = Type;
DPRINT("ErrorCode %lu\n", ErrorCode);
if ((ErrorCode == ERROR_SUCCESS) && (ValueData.Buffer != NULL))
if (ErrorCode == ERROR_SUCCESS ||
ErrorCode == ERROR_MORE_DATA)
{
if (lpType != NULL)
{
*lpType = Type;
}
if ((Type == REG_SZ) || (Type == REG_MULTI_SZ) || (Type == REG_EXPAND_SZ))
{
if (ErrorCode == ERROR_SUCCESS && ValueData.Buffer != NULL)
{
RtlInitAnsiString(&AnsiString, NULL);
AnsiString.Buffer = lpData;
@ -2305,11 +2319,14 @@ RegQueryValueExA (HKEY hKey,
ValueData.Length = Length;
ValueData.MaximumLength = ValueData.Length + sizeof(WCHAR);
RtlUnicodeStringToAnsiString(&AnsiString, &ValueData, FALSE);
}
Length = Length / sizeof(WCHAR);
}
else
{
Length = min(*lpcbData, Length);
if (ErrorCode == ERROR_SUCCESS && ValueData.Buffer != NULL)
{
RtlMoveMemory(lpData, ValueData.Buffer, Length);
}
}
@ -2318,8 +2335,9 @@ RegQueryValueExA (HKEY hKey,
{
*lpcbData = Length;
}
}
if (ValueData.Buffer)
if (ValueData.Buffer != NULL)
{
RtlFreeHeap(ProcessHeap, 0, ValueData.Buffer);
}