Updated embedded openssh server to clean up generated config. Updated config for internal sftp implementation, removal of deprecated config items.

Added closed flag to sftp handle plus check if file handle has already been closed on close/de-allocation.
Updated tests for py3.

Author: Pan

embedded_server/openssh.py

@@ -66,3 +66,4 @@ def stop(self):
 
     def __del__(self):
         self.stop()
+        os.unlink(SSHD_CONFIG)

embedded_server/sshd_config.tmpl

@@ -1,14 +1,9 @@
 Protocol 2
-UsePrivilegeSeparation no
 UsePAM no
-RhostsRSAAuthentication no
-HostbasedAuthentication no
+HostbasedAuthentication yes
 IgnoreUserKnownHosts yes
-GSSAPIAuthentication no
 ListenAddress 127.0.0.1
-KeyRegenerationInterval 3600
-ServerKeyBits 1024
 
 AcceptEnv LANG LC_*
-Subsystem sftp /usr/lib/openssh/sftp-server
+Subsystem sftp internal-sftp
 AuthorizedKeysFile {{parent_dir}}/authorized_keys