From 70c0a0ddf4311464eedef0011ed7b1f971a68de4 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Sun, 26 May 2019 03:18:06 -0500
Subject: [PATCH] ASN1: correctly handle long tags

---
 phpseclib/File/ASN1.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/phpseclib/File/ASN1.php b/phpseclib/File/ASN1.php
index d76306f9..abab574a 100644
--- a/phpseclib/File/ASN1.php
+++ b/phpseclib/File/ASN1.php
@@ -326,9 +326,10 @@ class File_ASN1
             $tag = 0;
             // process septets (since the eighth bit is ignored, it's not an octet)
             do {
-                $loop = ord($encoded[0]) >> 7;
+                $temp = ord($encoded[$encoded_pos++]);
+                $loop = $temp >> 7;
                 $tag <<= 7;
-                $tag |= ord($encoded[$encoded_pos++]) & 0x7F;
+                $tag |= $temp & 0x7F;
                 $start++;
             } while ($loop);
         }