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 asyncio framework. It requires Python 3.4 or later and either the PyCA library or the PyCrypto library for some cryptographic functions.
This package is released under the following terms:
Copyright (c) 2013-2014 by Ron Frederick <email@example.com>. 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:
Ron Frederick - initial implementation, API, and documentation
Notable features include:
Written from the ground up to be based on Python 3
- Support for a number of key exchange methods
Diffie Hellman group1 and group14 with SHA1
Diffie Hellman group exchange with SHA1 and SHA256
Elliptic Curve Diffie Hellman (nistp256, nistp384, and nistp521)
Curve25519 (if curve25519-donna Python wrapper is installed)
- Support for multiple authentication methods
Password, public key, and keyboard-interactive
- Support for a variety of public key formats
DSA, RSA, and ECDSA keys
PKCS#1/PKCS#8 DER and PEM, OpenSSH, and RFC4716 formats
Password-based encryption of private keys
- Support for a variety of ciphers (provided via PyCA or PyCrypto)
AES, ARC4, Blowfish, CAST, and Triple DES
- Support for a variety of MAC algorithms
HMAC with MD5, SHA1, SHA256, and SHA512
- Support for gzip compression
Including OpenSSH variant to delay compression until after auth
Support for passing environment variables, terminal type, and window size
Support for multiple simultaneous sessions on a single SSH connection
Support for handling multiple SSH connections in a single event loop
Support for direct and forwarded TCP/IP channels
Support for both byte and string based I/O with settable encoding
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 methods, ciphers, and compression algorithms
To use asyncssh, you need the following:
Python 3.4 or later
PyCrypto 2.6 or later and/or PyCA 0.6.1 or later
Install Python 3.4 or later from http://www.python.org or your favorite packaging system.
Optionally install PyCrypto 2.6 or later from http://www.pycrypto.org or your favorite packaging system.
Optionally install PyCA 0.6.1 or later from https://cryptography.io or your favorite packaging system.
Optionally install curve25519-donna from http://github.com/agl/curve25519-donna if you want support for Curve25519 Diffie Hellman key exchange.
Install AsyncSSH by running:
% pip install asyncssh
- Check out the examples to get started!
Three mailing lists are available for AsyncSSH:
firstname.lastname@example.org: Project announcements
email@example.com: Development discussions
- firstname.lastname@example.org: End-user discussions
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