Rust

Add a PFX Source to MailMan for Decryption

Demonstrates the Chilkat MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the MailMan object's internal list of sources used for locating certificates and private keys — for example, to decrypt S/MIME email downloaded from the server. The second argument is the PFX password. This example configures a POP3 connection and registers a PFX source.

Background: When MailMan downloads an encrypted (S/MIME) message, it needs the recipient's private key to decrypt it. On Windows and macOS the OS certificate stores are searched automatically, but when the key lives in a standalone PFX file — common on Linux or in server deployments — AddPfxSourceFile tells MailMan where to find it. A PFX bundles the certificate and its private key in one password-protected file.

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// Demonstrates the MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the
// MailMan object's internal list of sources used for locating certificates and private
// keys (for example, to decrypt downloaded S/MIME email).  The 2nd argument is the PFX
// password.

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

// Configure the POP3 server connection.
mailman.set_mail_host("pop.example.com");
mailman.set_mail_port(995);
mailman.set_pop_ssl(true);
mailman.set_pop_username("user@example.com");
mailman.set_pop_password("myPassword");

// Provide a PFX so that encrypted emails downloaded from the server can be decrypted.

if mailman.add_pfx_source_file("qa_data/certs/decryption.pfx", "pfx_password").is_err() {
    println!("{}", mailman.last_error_text());
    return;
}

println!("Added the PFX certificate/private-key source.");

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