Rust

Set a TLS Client Certificate for IMAP

Demonstrates the Chilkat Imap.SetSslClientCert method, which supplies a client certificate for TLS client-certificate authentication. The only argument is a Cert object that must provide access to its private key. Call it before connecting. This example loads the certificate from a PFX file.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: Most IMAP servers authenticate with a username and password only. A few high-security deployments additionally require mutual TLS, where the client presents its own certificate during the handshake. Because that happens as part of connecting, the certificate must be set before Connect — setting it afterward has no effect on the already-established connection.

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Rust


// Demonstrates the Imap.SetSslClientCert method, which supplies a client certificate for TLS
// client-certificate authentication.  The only argument is a Cert object.  It must be called
// before connecting.

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

imap.set_ssl(true);
imap.set_port(993);

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

// Load the client certificate (and its private key) from a PFX file.
let cert = chilkat::Cert::new();
if cert.load_pfx_file("qa_data/client.pfx", &pfx_password).is_err() {
    println!("{}", cert.last_error_text());
    return;
}

// Provide the client certificate BEFORE connecting.
if imap.set_ssl_client_cert(&cert).is_err() {
    println!("{}", imap.last_error_text());
    return;
}

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;
}