Simple Elixir implementation for the Erlang :ssh_client_key_api behavior, to make it easier to specify SSH keys and known_hosts files independently of any particular user's home directory.

By itself, :ssh_client_key_api does not provide SSH functionality, it only adds a way to send private key information to an SSH connection. It is meant to be used alongside an SSH library such as :ssh, SSHex, SSHKit, or the like.

Note: Upgrade to ssh_client_key_api 0.3.0 or higher for use with Erlang/OTP 25

• rsa - with or without passphrase
• ed25519 - only supported without a passphrase
• ecdsa - only supported without a passphrase
• dsa - with or without passphrase (but DSA keys are not recommended)
  • OpenSSH 7.0 and higher no longer accept DSA keys by default
  • Note tested on OTP 25+, but still expected to work

The package can be installed by adding :ssh_client_key_api to your list of dependencies in mix.exs:

def deps do
  [
    {:ssh_client_key_api, "~> 0.2.0"}
  ]
end

SSHClientKeyAPI is meant to primarily be used via the convenience function with_options/1. See with_options/1 for full list of available options.

key = File.open!("path/to/id_rsa") # Other key types supported as well
known_hosts = File.open!("path/to/known_hosts", [:read, :write])

cb = SSHClientKeyAPI.with_options(
  identity: key,
  known_hosts: known_hosts,
  silently_accept_hosts: true
)

The result can then be passed as an option when creating an SSH connection.

Using SSHKit.SSH.connect/2:

connection = SSHKit.SSH.connect("example.com", key_cb: cb)

Or through SSHKit.context/2:

context = SSHKit.context("example.com", key_cb: cb)

Copyright (c) 2017 Lab Zero Innovations Inc.

This library is MIT licensed. See the LICENSE for details.