From a643e5bfb5430994e9995e79daf13ade6d7d0ac9 Mon Sep 17 00:00:00 2001
From: Andreas Fischer <bantu@phpbb.com>
Date: Mon, 2 Jun 2014 20:24:25 +0200
Subject: [PATCH] Correct the remaining case by using instanceof.

---
 phpseclib/File/ASN1.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index 0601f48c..8fe51018 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -1030,7 +1030,7 @@ class File_ASN1
                     case !isset($source):
                         return $this->_encode_der(null, array('type' => FILE_ASN1_TYPE_NULL) + $mapping, null, $special);
                     case is_int($source):
-                    case is_object($source) && strtolower(get_class($source)) == 'math_biginteger': // TODO
+                    case $source instanceof \phpseclib\Math\BigInteger:
                         return $this->_encode_der($source, array('type' => FILE_ASN1_TYPE_INTEGER) + $mapping, null, $special);
                     case is_float($source):
                         return $this->_encode_der($source, array('type' => FILE_ASN1_TYPE_REAL) + $mapping, null, $special);