Rust Requires Chilkat v11.0.0+

Accept TLS Connection with Client Authentication

See more Socket/SSL/TLS Examples

Demonstrates how to accept a TLS connection requiring client authentication. This is the case where the TLS client sends a certificate. It is also known as "Two-Way SSL". Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let listen_ssl_socket = chilkat::Socket::new();

// An SSL/TLS server needs a digital certificate.  This example loads it from a PFX file.
// Note: This is the server's certificate.

let cert = chilkat::Cert::new();
// The 1st argument is the file path, the 2nd arg is the 
// PFX file's password:
if cert.load_pfx_file("chilkat.pfx", "test").is_err() {
    println!("{}", cert.last_error_text());
    return;
}

// To accept client client certificates in the TLS handshake,
// we must indicate a list of acceptable client certificate root CA DN's
// that are allowed.  (DN is an acronym for Distinguished Name.)
// Call AddSslAcceptableClientCaDn once for each acceptable CA DN.
// Here are a few examples so you can see the general format of a DN.
let _ = listen_ssl_socket.add_ssl_acceptable_client_ca_dn("C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root");
let _ = listen_ssl_socket.add_ssl_acceptable_client_ca_dn("O=Digital Signature Trust Co., CN=DST Root CA X3");

// Use the certificate:
if listen_ssl_socket.init_ssl_server(&cert).is_err() {
    println!("{}", listen_ssl_socket.last_error_text());
    return;
}

// Bind and listen on a port:
let my_port = 8123;
// Allow for a max of 5 queued connect requests.
let back_log = 5;
if listen_ssl_socket.bind_and_listen(my_port, back_log).is_err() {
    println!("{}", listen_ssl_socket.last_error_text());
    return;
}

// If accepting an SSL/TLS connection, the SSL handshake is part of the connection
// establishment process. This involves a few back-and-forth messages between the 
// client and server to establish algorithms and a shared key to create the secure 
// channel. The sending and receiving of these messages are governed by the 
// MaxReadIdleMs and MaxSendIdleMs properties. If these properties are set to 0 
// (and this is the default unless changed by your application), then the 
// AcceptNext can hang indefinitely during the SSL handshake process. 
// Make sure these properties are set to appropriate values before calling AcceptNext.

// Set a 10 second max for waiting to read/write.  This is for the SSL/TLS handshake establishment.
listen_ssl_socket.set_max_read_idle_ms(10000);
listen_ssl_socket.set_max_send_idle_ms(10000);

// Accept a single client connection and establish the secure SSL/TLS channel:
let max_wait_millisec = 20000;
let client_sock = chilkat::Socket::new();
if listen_ssl_socket.accept_next(max_wait_millisec, &client_sock).is_err() {
    println!("{}", listen_ssl_socket.last_error_text());
    return;
}

// The client (in this example) is going to send a "Hello Server! -EOM-" 
// message.  Read it:
let Ok(received_msg) = client_sock.receive_until_match("-EOM-") else {
    println!("{}", client_sock.last_error_text());
    return;
};

println!("{}", received_msg);

// Send a "Hello Client! -EOM-" message:
if client_sock.send_string("Hello Client! -EOM-").is_err() {
    println!("{}", client_sock.last_error_text());
    return;
}

// Close the connection with the client
// Wait a max of 20 seconds (20000 millsec)
let _ = client_sock.close(20000).is_ok();