Rust

Get the SSH Server's Authentication Methods

Demonstrates the Chilkat Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH server for the authentication methods it advertises. It takes no arguments and returns a lowercase, comma-separated list such as publickey,password,keyboard-interactive. Call it after Connect and before authenticating.

Background: Knowing what the server accepts lets a client choose the right authentication path — for example, falling back to keyboard-interactive when password auth is not offered. Note the documented connection side effect: querying methods advances the SSH authentication state, so call it at the correct point in the sequence.

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Rust


// Demonstrates the Ssh.GetAuthMethods method, which queries a connected but unauthenticated SSH
// server for the authentication methods it advertises.  It takes no arguments and returns a
// lowercase, comma-separated list such as "publickey,password,keyboard-interactive".

let ssh = chilkat::Ssh::new();

// Connect to the SSH server.  Port 22 is the usual SSH port.
let ssh_port = 22;
if ssh.connect("ssh.example.com", ssh_port).is_err() {
    println!("{}", ssh.last_error_text());
    return;
}

// Query the advertised authentication methods.  Call after Connect, before authenticating.
let Ok(methods) = ssh.get_auth_methods() else {
    println!("{}", ssh.last_error_text());
    return;
};

println!("Server auth methods: {}", methods);

ssh.disconnect();