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asyncssh 1.3.2

AsyncSSH: Asynchronous SSHv2 client and server library

AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python 3.4+ asyncio framework.

import asyncio, asyncssh, sys

def run_client():
    with (yield from asyncssh.connect('localhost')) as conn:
        stdin, stdout, stderr = yield from conn.open_session('echo "Hello!"')
        output = yield from
        print(output, end='')

        status =
        if status:
            print('Program exited with status %d' % status, file=sys.stderr)
            print('Program exited successfully')

Check out the examples to get started!


  • Full support for SSHv2 and SFTP client and server functions
    • Shell, command, and subsystem channels
    • Environment variables, terminal type, and window size
    • Direct and forwarded TCP/IP channels
    • Local and remote TCP/IP port forwarding
    • SFTP protocol version 3 with OpenSSH extensions
  • Multiple simultaneous sessions on a single SSH connection
  • Multiple SSH connections in a single event loop
  • Byte and string based I/O with settable encoding
  • A variety of key exchange, encryption, and MAC algorithms
  • Support for gzip compression
    • Including OpenSSH variant to delay compression until after auth
  • Password, public key, and keyboard-interactive user authentication methods
  • Many types and formats of public keys and certificates
  • OpenSSH-style known_hosts file support
  • OpenSSH-style authorized_keys file support
  • Compatibility with OpenSSH “Encrypt then MAC” option for better security
  • Time and byte-count based session key renegotiation
  • Designed to be easy to extend to support new forms of key exchange, authentication, encryption, and compression algorithms


This package is released under the following terms:

Copyright (c) 2013-2015 by Ron Frederick <>. All rights reserved.

This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution and is available at:

For more information about this license, please see the Eclipse Public License FAQ.


To use asyncssh, you need the following:

  • Python 3.4 or later
  • cryptography (PyCA) 1.1 or later


Install AsyncSSH by running:

pip install asyncssh

Optional Extras

There are some optional modules you can install to enable additional functionality:

AsyncSSH defines the following optional PyPI extra packages to make it easy to install any or all of these dependencies:


For example, to install all of these, you can run:

pip install 'asyncssh[bcrypt,libnacl]'

Note that you will still need to manually install the libsodium library listed above for libnacl to work correctly. Unfortunately, since libsodium is not a Python package, it cannot be directly installed using pip.

Mailing Lists

Three mailing lists are available for AsyncSSH:

File Type Py Version Uploaded on Size
asyncssh-1.3.2-py3.4.egg (md5) Python Egg 3.4 2015-11-27 353KB
asyncssh-1.3.2.tar.gz (md5) Source 2015-11-27 141KB
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