From b26f14e5feab0f7181f44a7a94772a7b80bc8e0f Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Sat, 17 Dec 2016 16:09:48 -0600
Subject: [PATCH 1/2] SSH2: make it so disabling PTY closes exec() channel if
 it's open

---
 phpseclib/Net/SSH2.php | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 8bf9a805..68de7fbc 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -2601,6 +2601,11 @@ class Net_SSH2
             return false;
         }
 
+        if ($this->in_request_pty_exec) {
+            user_error('If you want to run multiple exec()\'s you will need to disable (and re-enable if appropriate) a PTY for each one.');
+            return false;
+        }
+
         // RFC4254 defines the (client) window size as "bytes the other party can send before it must wait for the window to
         // be adjusted".  0x7FFFFFFF is, at 2GB, the max size.  technically, it should probably be decremented, but,
         // honestly, if you're transferring more than 2GB, you probably shouldn't be using phpseclib, anyway.
@@ -3408,6 +3413,10 @@ class Net_SSH2
      */
     function disablePTY()
     {
+        if ($this->in_request_pty_exec) {
+            $this->_close_channel(NET_SSH2_CHANNEL_EXEC);
+            $this->in_request_pty_exec = false;
+        }
         $this->request_pty = false;
     }
 

From 95335f95608a152c1490e3c3e3086eaa86eb93e5 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Sat, 24 Dec 2016 21:20:13 -0600
Subject: [PATCH 2/2] SSH2: update PTY changes for 2.0 branch

---
 phpseclib/Net/SSH2.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index ed506c29..b6aed420 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3312,7 +3312,7 @@ class SSH2
     function disablePTY()
     {
         if ($this->in_request_pty_exec) {
-            $this->_close_channel(NET_SSH2_CHANNEL_EXEC);
+            $this->_close_channel(self::CHANNEL_EXEC);
             $this->in_request_pty_exec = false;
         }
         $this->request_pty = false;