Rust

Check if a MIME Entity is Encrypted (S/MIME)

Demonstrates the Chilkat Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: This tells you a message is encrypted and must be decrypted before its real content is available — the trigger for supplying a recipient certificate and private key to Decrypt. Reading the body without decrypting first would just yield the opaque PKCS #7 blob.

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Rust


// Demonstrates the Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper.  It takes no arguments.

let mime = chilkat::Mime::new();
if mime.load_mime_file("qa_data/encrypted.eml").is_err() {
    println!("{}", mime.last_error_text());
    return;
}

if mime.is_encrypted() {
    println!("This is an encrypted S/MIME message.");
} else {
    println!("This is not an encrypted S/MIME message.");
}