Rust

Authenticate an IMAP SSH Tunnel with a Password

Demonstrates the Chilkat Imap.SshAuthenticatePw method, which authenticates the SSH tunnel using a username and password. The first argument is the SSH login name and the second is the SSH password. Call SshOpenTunnel first; after SSH authentication succeeds, connect and log in to IMAP.

Background: This is SSH authentication, which is entirely separate from the IMAP login that follows — the SSH credentials belong to the tunnel/jump host, while the IMAP credentials belong to the mail account. Password authentication is the simplest option; use SshAuthenticatePk for key-based authentication, which is generally preferred for automated jobs.

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Rust


// Demonstrates the Imap.SshAuthenticatePw method, which authenticates the SSH tunnel with a
// username and password.  The 1st argument is the SSH login name and the 2nd is the SSH
// password.  Call SshOpenTunnel first.

let imap = chilkat::Imap::new();

// Open the SSH tunnel first.
let ssh_port = 22;
if imap.ssh_open_tunnel("ssh.example.com", ssh_port).is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// The SSH password is not hard-coded in source.  Insert code here to obtain it from an
// interactive prompt, environment variable, or a secrets vault.
let ssh_password = String::new();

// Authenticate the SSH tunnel (this is SSH authentication, separate from IMAP login).
if imap.ssh_authenticate_pw("sshUser", &ssh_password).is_err() {
    println!("{}", imap.last_error_text());
    return;
}

// With the SSH tunnel in place, connect and log in to the IMAP server as usual.  The IMAP
// traffic flows through the tunnel automatically.
imap.set_ssl(true);
imap.set_port(993);
if imap.connect("imap.example.com").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

if imap.login("user@example.com", "myPassword").is_err() {
    println!("{}", imap.last_error_text());
    return;
}

if imap.disconnect().is_err() {
    println!("{}", imap.last_error_text());
    return;
}

if imap.ssh_close_tunnel().is_err() {
    println!("{}", imap.last_error_text());
    return;
}