Connecting with paramiko using the user's OpenSSH config

paramiko-using-ssh-config.py

        client = paramiko.SSHClient()
        client._policy = paramiko.WarningPolicy()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        ssh_config = paramiko.SSHConfig()
        user_config_file = os.path.expanduser("~/.ssh/config")
        if os.path.exists(user_config_file):
            with open(user_config_file) as f:
                ssh_config.parse(f)

        cfg = {'hostname': options['hostname'], 'username': options["username"]}

        user_config = ssh_config.lookup(cfg['hostname'])
        for k in ('hostname', 'username', 'port'):
            if k in user_config:
                cfg[k] = user_config[k]

        if 'proxycommand' in user_config:
            cfg['sock'] = paramiko.ProxyCommand(user_config['proxycommand'])

        client.connect(**cfg)

Why is this not in paramiko?

Also, I have found that in some situations, one will need to explicitly supply the private key. Paramiko is always a first date for me. :-D

explicitly supply private key

user_config = ssh_config.lookup(persona)
with open(user_config["identityfile"][0], "rb") as keyobj:
    pkey = paramiko.RSAKey.from_private_key(keyobj)

    cfg = { 
            "hostname": user_config["hostname"],
            "username": user_config["user"],
            "port": int(user_config["port"]),
            "pkey": pkey,
            }

For supplying private key the key_filename parameter can also be used:

if 'identityfile' in user_config:
    cfg['key_filename'] = user_config['identityfile']

Thanks, this is great!

I'm new to python, could you explain me how to use paramiko / Pexpect in python ?

If someone happens here because they are using Fabric: env.use_ssh_config = True