advapi32: Implement GetSecurityInfo(SE_WINDOW_OBJECT).

dlls/advapi32/Makefile.in

@@ -2,7 +2,7 @@ EXTRADEFS = -D_ADVAPI32_
 MODULE    = advapi32.dll
 IMPORTLIB = advapi32
 IMPORTS   = kernelbase sechost msvcrt
-DELAYIMPORTS = rpcrt4
+DELAYIMPORTS = rpcrt4 user32
 
 C_SRCS = \
 	advapi.c \

dlls/advapi32/security.c

@@ -1529,6 +1529,21 @@ DWORD WINAPI GetSecurityInfo( HANDLE handle, SE_OBJECT_TYPE type, SECURITY_INFOR
         }
         break;
 
+    case SE_WINDOW_OBJECT:
+        if (!GetUserObjectSecurity( handle, &SecurityInfo, NULL, 0, &size )
+                && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+            return GetLastError();
+
+        if (!(sd = LocalAlloc( 0, size )))
+            return ERROR_NOT_ENOUGH_MEMORY;
+
+        if (!GetUserObjectSecurity( handle, &SecurityInfo, sd, size, &size ))
+        {
+            LocalFree( sd );
+            return GetLastError();
+        }
+        break;
+
     case SE_KERNEL_OBJECT:
     case SE_FILE_OBJECT:
     case SE_WMIGUID_OBJECT:

dlls/advapi32/tests/Makefile.in

 TESTDLL   = advapi32.dll
-IMPORTS   = advapi32
+IMPORTS   = advapi32 user32
 
 C_SRCS = \
 	cred.c \

dlls/advapi32/tests/security.c

@@ -8780,6 +8780,28 @@ static void test_IsValidSecurityDescriptor(void)
     free(sd);
 }
 
+static void test_window_security(void)
+{
+    PSECURITY_DESCRIPTOR sd;
+    BOOL present, defaulted;
+    HDESK desktop;
+    DWORD ret;
+    ACL *dacl;
+
+    desktop = GetThreadDesktop(GetCurrentThreadId());
+
+    ret = GetSecurityInfo(desktop, SE_WINDOW_OBJECT,
+            DACL_SECURITY_INFORMATION, NULL, NULL, NULL, NULL, &sd);
+    ok(!ret, "got error %lu\n", ret);
+
+    ret = GetSecurityDescriptorDacl(sd, &present, &dacl, &defaulted);
+    ok(ret == TRUE, "got error %lu\n", GetLastError());
+    todo_wine ok(present == TRUE, "got present %d\n", present);
+    ok(defaulted == FALSE, "got defaulted %d\n", defaulted);
+
+    LocalFree(sd);
+}
+
 START_TEST(security)
 {
     init();
@@ -8850,6 +8872,7 @@ START_TEST(security)
     test_elevation();
     test_group_as_file_owner();
     test_IsValidSecurityDescriptor();
+    test_window_security();
 
     /* Must be the last test, modifies process token */
     test_token_security_descriptor();