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Fix parameter validation in WM_GETTEXT and GetWindowText.

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svn path=/trunk/; revision=17944
This commit is contained in:
Filip Navara 2005-09-20 09:31:13 +00:00
parent 7936d2bbcf
commit 1dc1b56c2f
2 changed files with 35 additions and 55 deletions
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8
reactos/lib/user32/windows/defwnd.c
View file

@ -1426,10 +1426,6 @@ DefWindowProcA(HWND hWnd,
LPSTR AnsiBuffer = (LPSTR)lParam;
INT Length;
if (wParam > 1)
{
*((PWSTR)lParam) = '\0';
}
Buffer = HeapAlloc(GetProcessHeap(), 0, wParam * sizeof(WCHAR));
if (!Buffer)
return FALSE;
@ -1505,10 +1501,6 @@ DefWindowProcW(HWND hWnd,
case WM_GETTEXT:
{
if (wParam > 1)
{
*((PWSTR)lParam) = L'\0';
}
return (LRESULT)NtUserInternalGetWindowText(hWnd, (PWSTR)lParam, wParam);
}

44
reactos/lib/user32/windows/window.c
View file

@ -820,21 +820,19 @@ int STDCALL
GetWindowTextA(HWND hWnd, LPSTR lpString, int nMaxCount)
{
DWORD ProcessId;
if(!NtUserGetWindowThreadProcessId(hWnd, &ProcessId))
{
return 0;
}
if(ProcessId != GetCurrentProcessId())
if (lpString == NULL)
return 0;
if (!NtUserGetWindowThreadProcessId(hWnd, &ProcessId))
return 0;
if (ProcessId != GetCurrentProcessId())
{
/* do not send WM_GETTEXT messages to other processes */
LPWSTR Buffer;
INT Length;
if (nMaxCount > 1)
{
*((PWSTR)lpString) = '\0';
}
Buffer = HeapAlloc(GetProcessHeap(), 0, nMaxCount * sizeof(WCHAR));
if (!Buffer)
return FALSE;
@ -845,13 +843,12 @@ GetWindowTextA(HWND hWnd, LPSTR lpString, int nMaxCount)
{
lpString[0] = '\0';
}
HeapFree(GetProcessHeap(), 0, Buffer);
return (LRESULT)Length;
}
return(SendMessageA(hWnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString));
return SendMessageA(hWnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString);
}
@ -903,29 +900,20 @@ GetWindowTextLengthW(HWND hWnd)
* @implemented
*/
int STDCALL
GetWindowTextW(
HWND hWnd,
LPWSTR lpString,
int nMaxCount)
GetWindowTextW(HWND hWnd, LPWSTR lpString, int nMaxCount)
{
DWORD ProcessId;
if(!NtUserGetWindowThreadProcessId(hWnd, &ProcessId))
{
if (lpString == NULL)
return 0;
}
if(ProcessId == GetCurrentProcessId())
{
return(SendMessageW(hWnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString));
}
if (!NtUserGetWindowThreadProcessId(hWnd, &ProcessId))
return 0;
/* do not send WM_GETTEXT messages to other processes */
if (nMaxCount > 1)
{
*((PWSTR)lpString) = L'\0';
}
if (ProcessId == GetCurrentProcessId())
return SendMessageW(hWnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString);
return (LRESULT)NtUserInternalGetWindowText(hWnd, (PWSTR)lpString, nMaxCount);
return NtUserInternalGetWindowText(hWnd, lpString, nMaxCount);
}
DWORD STDCALL