[ekohl] 55417: [ADVAPI32] Add or fix parameter checks.

Author: ekohl
Date: Sat Feb  4 19:56:21 2012
New Revision: 55417

URL: http://svn.reactos.org/svn/reactos?rev=55417&view=rev
Log:
[ADVAPI32]
Add or fix parameter checks.

Modified:
    trunk/reactos/dll/win32/advapi32/service/eventlog.c

Modified: trunk/reactos/dll/win32/advapi32/service/eventlog.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/advapi32/service…
==============================================================================
--- trunk/reactos/dll/win32/advapi32/service/eventlog.c [iso-8859-1] (original)
+++ trunk/reactos/dll/win32/advapi32/service/eventlog.c [iso-8859-1] Sat Feb  4 19:56:21
2012
@@ -452,7 +452,7 @@
 
     TRACE("%p, %p\n", hEventLog, NumberOfRecords);
 
-    if(!NumberOfRecords)
+    if (NumberOfRecords == NULL)
     {
         SetLastError(ERROR_INVALID_PARAMETER);
         return FALSE;
@@ -497,7 +497,7 @@
 
     TRACE("%p, %p\n", hEventLog, OldestRecord);
 
-    if(!OldestRecord)
+    if (OldestRecord == NULL)
     {
         SetLastError(ERROR_INVALID_PARAMETER);
         return FALSE;
@@ -630,16 +630,15 @@
 
     if (lpFileName == NULL)
     {
-        RtlInitUnicodeString(&FileNameW, NULL);
-    }
-    else
-    {
-        if (!RtlDosPathNameToNtPathName_U(lpFileName, &FileNameW,
-                                          NULL, NULL))
-        {
-            SetLastError(ERROR_INVALID_PARAMETER);
-            return NULL;
-        }
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return NULL;
+    }
+
+    if (!RtlDosPathNameToNtPathName_U(lpFileName, &FileNameW,
+                                      NULL, NULL))
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return NULL;
     }
 
     RpcTryExcept
@@ -802,22 +801,32 @@
 {
     NTSTATUS Status;
     DWORD bytesRead, minNumberOfBytesNeeded;
+    DWORD dwFlags;
 
     TRACE("%p, %lu, %lu, %p, %lu, %p, %p\n",
         hEventLog, dwReadFlags, dwRecordOffset, lpBuffer,
         nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded);
 
-    if(!pnBytesRead || !pnMinNumberOfBytesNeeded)
-    {
-        SetLastError(ERROR_INVALID_PARAMETER);
-        return FALSE;
-    }
-
-    /* If buffer is NULL set nNumberOfBytesToRead to 0 to prevent rpcrt4 from
-       trying to access a null pointer */
-    if (!lpBuffer)
-    {
-        nNumberOfBytesToRead = 0;
+    if (lpBuffer == NULL ||
+        pnBytesRead == NULL ||
+        pnMinNumberOfBytesNeeded == NULL)
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
+    dwFlags = dwReadFlags & (EVENTLOG_SEQUENTIAL_READ | EVENTLOG_SEEK_READ);
+    if (dwFlags == (EVENTLOG_SEQUENTIAL_READ | EVENTLOG_SEEK_READ))
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
+    dwFlags = dwReadFlags & (EVENTLOG_FORWARDS_READ | EVENTLOG_BACKWARDS_READ);
+    if (dwFlags == (EVENTLOG_FORWARDS_READ | EVENTLOG_BACKWARDS_READ))
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
     }
 
     RpcTryExcept
@@ -872,22 +881,32 @@
 {
     NTSTATUS Status;
     DWORD bytesRead, minNumberOfBytesNeeded;
+    DWORD dwFlags;
 
     TRACE("%p, %lu, %lu, %p, %lu, %p, %p\n",
         hEventLog, dwReadFlags, dwRecordOffset, lpBuffer,
         nNumberOfBytesToRead, pnBytesRead, pnMinNumberOfBytesNeeded);
 
-    if(!pnBytesRead || !pnMinNumberOfBytesNeeded)
-    {
-        SetLastError(ERROR_INVALID_PARAMETER);
-        return FALSE;
-    }
-
-    /* If buffer is NULL set nNumberOfBytesToRead to 0 to prevent rpcrt4 from
-       trying to access a null pointer */
-    if (!lpBuffer)
-    {
-        nNumberOfBytesToRead = 0;
+    if (lpBuffer == NULL ||
+        pnBytesRead == NULL ||
+        pnMinNumberOfBytesNeeded == NULL)
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
+    dwFlags = dwReadFlags & (EVENTLOG_SEQUENTIAL_READ | EVENTLOG_SEEK_READ);
+    if (dwFlags == (EVENTLOG_SEQUENTIAL_READ | EVENTLOG_SEEK_READ))
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
+
+    dwFlags = dwReadFlags & (EVENTLOG_FORWARDS_READ | EVENTLOG_BACKWARDS_READ);
+    if (dwFlags == (EVENTLOG_FORWARDS_READ | EVENTLOG_BACKWARDS_READ))
+    {
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
     }
 
     RpcTryExcept