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[EVENTVWR] Fix settings loading. Remove usage of Rtl functions. Use Win32 CRT assert. (#4752)

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- Don't create the settings registry key when trying to load them.
  Defer its creation when saving the settings.

- Use more restricted access rights when opening/creating the key.

- Ensure read and written string settings are NULL-terminated.

- Use the Win32 CRT assert so that if an assertion fails we get a
  message on the screen, not via the kernel debugger.
This commit is contained in:
Hermès Bélusca-Maïto 2022-10-04 02:15:22 +02:00
parent cdf907074d
commit 069b08da0b
No known key found for this signature in database
GPG key ID: 3B2539C65E7B93D0
2 changed files with 98 additions and 90 deletions
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172
base/applications/mscutils/eventvwr/eventvwr.c
View file

@ -346,116 +346,135 @@ Quit:
BOOL
LoadSettings(int nDefCmdShow)
{
HKEY hKeyEventVwr;
LONG Result;
DWORD dwSize;
DWORD dwType;
DWORD Value;
UNICODE_STRING ValueU;
HKEY hKeyEventVwr;
DWORD dwType, cbData;
WCHAR buffer[100];
/* Load the default values */
Settings.bSaveSettings = TRUE;
Settings.bShowDetailsPane = TRUE;
Settings.bShowGrid = FALSE;
Settings.bSaveSettings = TRUE;
Settings.bNewestEventsFirst = TRUE;
Settings.nVSplitPos = 250; /* Splitter default positions */
Settings.nHSplitPos = 250;
ZeroMemory(&Settings.wpPos, sizeof(Settings.wpPos));
Settings.wpPos.length = sizeof(Settings.wpPos);
Settings.wpPos.rcNormalPosition.left = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.top = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.right = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.bottom = CW_USEDEFAULT;
SetRect(&Settings.wpPos.rcNormalPosition,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT);
Settings.wpPos.showCmd = nDefCmdShow; // SW_SHOWNORMAL;
/* Try to create/open the Event Viewer user key */
if (RegCreateKeyExW(HKEY_CURRENT_USER,
/* Try to open the Event Viewer user key */
if (RegOpenKeyExW(HKEY_CURRENT_USER,
EVNTVWR_PARAM_KEY,
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_READ | KEY_WRITE,
NULL,
&hKeyEventVwr,
NULL) != ERROR_SUCCESS)
KEY_QUERY_VALUE,
&hKeyEventVwr) != ERROR_SUCCESS)
{
return FALSE;
}
// Result = RegQueryValueExW(hKeyEventVwr, L"Filter", NULL, &dwType, (LPBYTE)&szFilter, &dwSize); // REG_SZ
// Result = RegQueryValueExW(hKeyEventVwr, L"Find", NULL, &dwType, (LPBYTE)&szFind, &dwSize); // REG_SZ
// Result = RegQueryValueExW(hKeyEventVwr, L"Module", NULL, &dwType, (LPBYTE)&szModule, &dwSize); // REG_SZ
// Result = RegQueryValueExW(hKeyEventVwr, L"Filter", NULL, &dwType, (LPBYTE)&szFilter, &cbData); // REG_SZ
// Result = RegQueryValueExW(hKeyEventVwr, L"Find", NULL, &dwType, (LPBYTE)&szFind, &cbData); // REG_SZ
// Result = RegQueryValueExW(hKeyEventVwr, L"Module", NULL, &dwType, (LPBYTE)&szModule, &cbData); // REG_SZ
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"DetailsPane", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"SaveSettings", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.bSaveSettings = !!(DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.bSaveSettings = !!*(PDWORD)buffer;
}
Settings.bShowDetailsPane = !!Value;
}
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"ShowGrid", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"DetailsPane", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.bShowDetailsPane = !!(DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.bShowDetailsPane = !!*(PDWORD)buffer;
}
Settings.bShowGrid = !!Value;
}
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"SortOrder", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"ShowGrid", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.bShowGrid = !!(DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.bShowGrid = !!*(PDWORD)buffer;
}
}
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"SortOrder", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.bNewestEventsFirst = !!(DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.bNewestEventsFirst = !!*(PDWORD)buffer;
}
Settings.bNewestEventsFirst = !!Value;
}
/* Retrieve the splitter positions */
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"VSplitPos", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"VSplitPos", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.nVSplitPos = (DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.nVSplitPos = *(PDWORD)buffer;
}
Settings.nVSplitPos = Value;
}
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"HSplitPos", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"HSplitPos", NULL, &dwType, (LPBYTE)buffer, &cbData);
if (Result == ERROR_SUCCESS)
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
Settings.nHSplitPos = (DWORD)_wtoi(buffer);
}
else if (dwType == REG_DWORD && cbData == sizeof(DWORD))
{
Settings.nHSplitPos = *(PDWORD)buffer;
}
Settings.nHSplitPos = Value;
}
/* Retrieve the geometry of the main window */
dwSize = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"Window", NULL, &dwType, (LPBYTE)buffer, &dwSize);
if ((Result != ERROR_SUCCESS) || (dwType != REG_SZ))
cbData = sizeof(buffer);
Result = RegQueryValueExW(hKeyEventVwr, L"Window", NULL, &dwType, (LPBYTE)buffer, &cbData);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ))
buffer[cbData / sizeof(WCHAR) - 1] = UNICODE_NULL;
else
buffer[0] = UNICODE_NULL;
if (swscanf(buffer, L"%d %d %d %d %d",
@ -466,26 +485,11 @@ LoadSettings(int nDefCmdShow)
&Settings.wpPos.showCmd) != 5)
{
/* Parsing failed, use defaults */
Settings.wpPos.rcNormalPosition.left = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.top = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.right = CW_USEDEFAULT;
Settings.wpPos.rcNormalPosition.bottom = CW_USEDEFAULT;
SetRect(&Settings.wpPos.rcNormalPosition,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT);
Settings.wpPos.showCmd = nDefCmdShow; // SW_SHOWNORMAL;
}
dwSize = sizeof(Value);
Result = RegQueryValueExW(hKeyEventVwr, L"SaveSettings", NULL, &dwType, (LPBYTE)&Value, &dwSize);
if ((Result == ERROR_SUCCESS) && (dwType == REG_SZ || dwType == REG_DWORD))
{
if (dwType == REG_SZ)
{
ValueU.Buffer = (PWSTR)&Value;
ValueU.Length = ValueU.MaximumLength = dwSize;
RtlUnicodeStringToInteger(&ValueU, 10, &Value);
}
Settings.bSaveSettings = !!Value;
}
RegCloseKey(hKeyEventVwr);
return TRUE;
}
@ -503,7 +507,7 @@ SaveSettings(VOID)
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_READ | KEY_WRITE,
KEY_SET_VALUE,
NULL,
&hKeyEventVwr,
NULL) != ERROR_SUCCESS)
@ -543,7 +547,7 @@ SaveSettings(VOID)
Settings.wpPos.rcNormalPosition.bottom,
Settings.wpPos.showCmd);
dwSize = (DWORD)(wcslen(buffer) * sizeof(WCHAR));
dwSize = (DWORD)((wcslen(buffer) + 1) * sizeof(WCHAR));
RegSetValueExW(hKeyEventVwr, L"Window", 0, REG_SZ, (LPBYTE)buffer, dwSize);
Quit:
@ -855,7 +859,7 @@ GetMessageStringFromDllList(
szMessageDllList = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, cbLength);
if (!szMessageDllList)
return NULL;
RtlCopyMemory(szMessageDllList, lpMessageDllList, cbLength);
CopyMemory(szMessageDllList, lpMessageDllList, cbLength);
/* Loop through the list of message DLLs */
szDll = wcstok(szMessageDllList, EVENT_DLL_SEPARATOR);
@ -1346,7 +1350,7 @@ AllocAndCopyMultiStr(IN PCWSTR MultiStr OPTIONAL)
pStr = HeapAlloc(GetProcessHeap(), 0, Length * sizeof(WCHAR));
// NOTE: If we failed allocating the string, then fall back into no filter!
if (pStr)
RtlCopyMemory(pStr, MultiStr, Length * sizeof(WCHAR));
CopyMemory(pStr, MultiStr, Length * sizeof(WCHAR));
return pStr;
}
@ -1386,7 +1390,7 @@ AllocEventLogFilter(// IN PCWSTR FilterName,
/* Copy the list of event logs */
EventLogFilter->NumOfEventLogs = NumOfEventLogs;
RtlCopyMemory(EventLogFilter->EventLogs, EventLogs, NumOfEventLogs * sizeof(PEVENTLOG));
CopyMemory(EventLogFilter->EventLogs, EventLogs, NumOfEventLogs * sizeof(PEVENTLOG));
/* Initialize the filter reference count */
EventLogFilter->ReferenceCount = 1;
@ -1508,7 +1512,7 @@ GetExpandedFilePathName(
lpFullFileName[1] = L'$';
/* Prepend the computer name */
RtlMoveMemory(lpFullFileName + 2 + wcslen(ComputerName) + 1,
MoveMemory(lpFullFileName + 2 + wcslen(ComputerName) + 1,
lpFullFileName, dwLength * sizeof(WCHAR) - (2 + wcslen(ComputerName) + 1) * sizeof(WCHAR));
lpFullFileName[0] = L'\\';
lpFullFileName[1] = L'\\';
@ -1699,7 +1703,7 @@ GetEventMessage(IN LPCWSTR KeyName,
{
if (iswdigit(lpMsgBuf[2]))
{
RtlMoveMemory(lpMsgBuf, lpMsgBuf+1, ((szStringArray + cch) - lpMsgBuf - 1) * sizeof(WCHAR));
MoveMemory(lpMsgBuf, lpMsgBuf+1, ((szStringArray + cch) - lpMsgBuf - 1) * sizeof(WCHAR));
}
}
@ -2198,7 +2202,7 @@ EnumEventsThread(IN LPVOID lpParameter)
StringCbPrintfW(szCategoryID, sizeof(szCategoryID), L"%u", pEvlrTmp->EventCategory);
g_RecordPtrs[dwCurrentRecord] = HeapAlloc(hProcessHeap, 0, pEvlrTmp->Length);
RtlCopyMemory(g_RecordPtrs[dwCurrentRecord], pEvlrTmp, pEvlrTmp->Length);
CopyMemory(g_RecordPtrs[dwCurrentRecord], pEvlrTmp, pEvlrTmp->Length);
lviEventItem.mask = LVIF_IMAGE | LVIF_TEXT | LVIF_PARAM;
lviEventItem.iItem = 0;

10
base/applications/mscutils/eventvwr/eventvwr.h
View file

@ -10,13 +10,17 @@
#ifndef _EVENTVWR_PCH_
#define _EVENTVWR_PCH_
// #pragma once
#pragma once
/* C Headers */
#include <stdio.h>
#include <stdlib.h>
#define WIN32_NO_STATUS
#include <assert.h>
#define ASSERT(x) assert(x)
/* PSDK Headers */
#define WIN32_NO_STATUS
#include <windef.h>
#include <winbase.h>
#include <wingdi.h>
@ -24,7 +28,7 @@
#include <winnls.h>
#include <winreg.h>
#include <ndk/rtlfuncs.h>
#include <ndk/rtlfuncs.h> // For linked-lists.
#define ROUND_DOWN(n, align) (((ULONG)n) & ~((align) - 1l))
#define ROUND_UP(n, align) ROUND_DOWN(((ULONG)n) + (align) - 1, (align))