From efe693e607e325cd00220f2d271d067a70e88b91 Mon Sep 17 00:00:00 2001
From: Piotr Caban <piotr@codeweavers.com>
Date: Tue, 25 Oct 2022 15:49:18 +0200
Subject: [PATCH] winspool: Implement print processor validation in AddPrinter.

---
 dlls/winspool.drv/info.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/dlls/winspool.drv/info.c b/dlls/winspool.drv/info.c
index e58ae925c2b..258d67c5788 100644
--- a/dlls/winspool.drv/info.c
+++ b/dlls/winspool.drv/info.c
@@ -2568,6 +2568,37 @@ static void set_devices_and_printerports(PRINTER_INFO_2W *pi)
     }
 }
 
+static BOOL validate_print_proc(WCHAR *server, const WCHAR *name)
+{
+    PRINTPROCESSOR_INFO_1W *ppi;
+    DWORD size, i, no;
+
+    if (!EnumPrintProcessorsW(server, NULL, 1, NULL, 0, &size, &no)
+            && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+    {
+        return FALSE;
+    }
+    ppi = malloc(size);
+    if (!ppi)
+    {
+        SetLastError(ERROR_OUTOFMEMORY);
+        return FALSE;
+    }
+    if (!EnumPrintProcessorsW(server, NULL, 1, (BYTE*)ppi, size, &size, &no))
+    {
+        free(ppi);
+        return FALSE;
+    }
+
+    for (i = 0; i < no; i++)
+    {
+        if (!wcsicmp(ppi[i].pName, name))
+            break;
+    }
+    free(ppi);
+    return i != no;
+}
+
 /*****************************************************************************
  *          AddPrinterW  [WINSPOOL.@]
  */
@@ -2628,7 +2659,7 @@ HANDLE WINAPI AddPrinterW(LPWSTR pName, DWORD Level, LPBYTE pPrinter)
     RegCloseKey(hkeyDriver);
     RegCloseKey(hkeyDrivers);
 
-    if (wcsicmp( pi->pPrintProcessor, L"WinPrint" ))
+    if (!validate_print_proc(pName, pi->pPrintProcessor))
     {
         FIXME("Can't find processor %s\n", debugstr_w(pi->pPrintProcessor));
 	SetLastError(ERROR_UNKNOWN_PRINTPROCESSOR);