/
stream_direct_server.py
executable file
·67 lines (57 loc) · 2.27 KB
/
stream_direct_server.py
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#!/usr/bin/env python3.6
#
# Copyright (c) 2013-2021 by Ron Frederick <ronf@timeheart.net> and others.
#
# This program and the accompanying materials are made available under
# the terms of the Eclipse Public License v2.0 which accompanies this
# distribution and is available at:
#
# http://www.eclipse.org/legal/epl-2.0/
#
# This program may also be made available under the following secondary
# licenses when the conditions for such availability set forth in the
# Eclipse Public License v2.0 are satisfied:
#
# GNU General Public License, Version 2.0, or any later versions of
# that license
#
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
#
# Contributors:
# Ron Frederick - initial implementation, API, and documentation
# To run this program, the file ``ssh_host_key`` must exist with an SSH
# private key in it to use as a server host key. An SSH host certificate
# can optionally be provided in the file ``ssh_host_key-cert.pub``.
#
# The file ``ssh_user_ca`` must exist with a cert-authority entry of
# the certificate authority which can sign valid client certificates.
import asyncio, asyncssh, sys
async def handle_connection(reader: asyncssh.SSHReader,
writer: asyncssh.SSHWriter) -> None:
while not reader.at_eof():
data = await reader.read(8192)
try:
writer.write(data)
except BrokenPipeError:
break
writer.close()
class MySSHServer(asyncssh.SSHServer):
def connection_requested(self, dest_host: str, dest_port: int,
orig_host: str, orig_port: int) -> \
asyncssh.SSHSocketSessionFactory:
if dest_port == 7:
return handle_connection
else:
raise asyncssh.ChannelOpenError(
asyncssh.OPEN_ADMINISTRATIVELY_PROHIBITED,
'Only echo connections allowed')
async def start_server() -> None:
await asyncssh.create_server(MySSHServer, '', 8022,
server_host_keys=['ssh_host_key'],
authorized_client_keys='ssh_user_ca')
loop = asyncio.get_event_loop()
try:
loop.run_until_complete(start_server())
except (OSError, asyncssh.Error) as exc:
sys.exit('SSH server failed: ' + str(exc))
loop.run_forever()