$NetBSD: patch-aa,v 1.3 2009/02/27 12:46:54 drochner Exp $

--- src/ARC2.c.orig	2002-05-17 15:34:45.000000000 +0200
+++ src/ARC2.c
@@ -11,6 +11,7 @@
  */
 
 #include <string.h>  
+#include "Python.h"
 
 #define MODULE_NAME ARC2
 #define BLOCK_SIZE 8
@@ -146,6 +147,12 @@ block_init(block_state *self, U8 *key, i
 	   We'll hardwire it to 1024. */
 #define bits 1024
 
+	if ((U32)keylength > sizeof(self->xkey)) {
+		PyErr_SetString(PyExc_ValueError,
+				"ARC2 key length must be less than 128 bytes");
+		return;
+	}
+
 	memcpy(self->xkey, key, keylength);
   
 	/* Phase 1: Expand input key to 128 bytes */
