Rust

Use a PFX TLS Client Certificate

Demonstrates the Chilkat MailMan.SetSslClientCertPfx method, which sets the client-side certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file. The first argument is the path to the PFX file and the second is its password. This example loads a client certificate directly from a PFX.

Background: This is the convenience form of SetSslClientCert: rather than loading a Cert object first, you point straight at the PFX file and password. A PFX (PKCS#12) bundles the certificate with its private key — exactly what mutual TLS requires, since the client must prove possession of the key during the handshake. It is the usual client-credential format on Windows.

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Rust

let mut success = false;

// Demonstrates the MailMan.SetSslClientCertPfx method, which sets the client-side
// certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file.  The 1st argument
// is the PFX path and the 2nd is the PFX password.

let mailman = chilkat::MailMan::new();

// Configure the SMTP server connection.
mailman.set_smtp_host("smtp.example.com");
mailman.set_smtp_port(465);
mailman.set_smtp_ssl(true);
mailman.set_smtp_username("user@example.com");
mailman.set_smtp_password("myPassword");

// Load the client certificate directly from a PFX file.
if mailman.set_ssl_client_cert_pfx("qa_data/certs/client.pfx", "pfx_password").is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

success = mailman.verify_smtp_login();
if !success {
    println!("{}", mailman.last_error_text());
    return;
}

println!("Connected using a PFX TLS client certificate.");

// Note: The path "qa_data/certs/client.pfx" is a relative local filesystem path,
// relative to the current working directory of the running application.