From 147c3ebea427a51b6a47a9e94e0a5bbfa0d97579 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@phpbb.com>
Date: Tue, 26 Mar 2013 19:50:24 -0500
Subject: [PATCH] ASN1: if an int val would be '' make it be "\0"

---
 phpseclib/File/ASN1.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index 6bc1e93d..80f26fff 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -918,6 +918,9 @@ class File_ASN1 {
                     }
                     $value = new Math_BigInteger($value);
                     $value = $value->toBytes(true);
+                    if (!strlen($value)) {
+                        $value = chr(0);
+                    }
                 }
                 break;
             case FILE_ASN1_TYPE_UTC_TIME: