From 133eea6233212745aa31846ef660cdcd01b47765 Mon Sep 17 00:00:00 2001
From: mg <mg@1nnovat.io>
Date: Tue, 11 Jan 2022 18:33:09 +0100
Subject: [PATCH] Support ssh v2 when version string does not contain CR

---
 lib/src/ssh_transport.dart | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/lib/src/ssh_transport.dart b/lib/src/ssh_transport.dart
index 0071186..8dbf305 100644
--- a/lib/src/ssh_transport.dart
+++ b/lib/src/ssh_transport.dart
@@ -268,9 +268,13 @@ class SSHTransport {
     final bufferString = latin1.decode(_buffer.data);
 
     // SSH version exchange is terminated by \r\n.
-    final index = bufferString.indexOf('\r\n');
+    var index = bufferString.indexOf('\r\n');
     if (index == -1) {
-      return;
+      // In the (rare) case SSH-2 version string is terminated by \n only (observed on Synology DS120j 2021)
+      index = bufferString.indexOf('\n');
+      _buffer.consume(index + 1);
+    } else {
+      _buffer.consume(index + 2);
     }
 
     final versionString = bufferString.substring(0, index);
@@ -282,7 +286,6 @@ class SSHTransport {
     printTrace?.call('<- $socket: $versionString');
     printDebug?.call('SSHTransport._remoteVersion = "$versionString"');
     _remoteVersion = versionString;
-    _buffer.consume(index + 2);
 
     if (isServer) {
       _sendKexInit();