From fe4dc433cc66b2fe854cd8fd50c04079995d2c22 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@gmail.com>
Date: Thu, 11 Nov 2021 19:06:18 -0600
Subject: [PATCH 1/2] SSH2: error out when no data is received from the server

---
 phpseclib/Net/SSH2.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index a95a3fd8..89e57487 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3537,7 +3537,8 @@ class Net_SSH2
         $raw = fread($this->fsock, $this->decrypt_block_size);
 
         if (!strlen($raw)) {
-            return '';
+            user_error('No data received from server');
+            return false;
         }
 
         if ($this->decrypt !== false) {

From 779e11e4963c52bc9fa690c370ce7f528053b99a Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@gmail.com>
Date: Thu, 11 Nov 2021 19:39:49 -0600
Subject: [PATCH 2/2] SSH2: use exceptions rather than user_error

---
 phpseclib/Net/SSH2.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 89c6b3df..2162b9c7 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -3335,8 +3335,8 @@ class SSH2
         $raw = stream_get_contents($this->fsock, $this->decrypt_block_size);
 
         if (!strlen($raw)) {
-            user_error('No data received from server');
-            return false;
+            $this->bitmap = 0;
+            throw new ConnectionClosedException('No data received from server');
         }
 
         if ($this->decrypt) {