Rust

Export an Encrypted PKCS #8 Private Key as Encoded Text

Demonstrates the Chilkat PrivateKey.GetPkcs8EncryptedENC method, which exports the key as password-protected PKCS #8 DER and encodes the encrypted DER as text. The first argument names the binary encoding and the second is the password. The cipher is selected by Pkcs8EncryptAlg.

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

Background: This combines encryption with text encoding: the key is protected by a passphrase and returned as a string, ideal for storing an encrypted key in a text-only medium such as JSON or an environment variable. It is the encrypted counterpart to GetPkcs8ENC. Source the password securely.

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Rust


// Load a private key to export.
let priv_key = chilkat::PrivateKey::new();
if priv_key.load_pem_file("qa_data/private.pem").is_err() {
    println!("{}", priv_key.last_error_text());
    return;
}

// The key password is not hard-coded in a real application; obtain it from an interactive
// prompt, environment variable, or a secrets vault.
let password = "myKeyPassword".to_string();

// Export as password-protected PKCS #8 DER, then encode the encrypted DER as text.  The 1st
// argument names the binary encoding and the 2nd is the password.  The cipher is selected by the
// Pkcs8EncryptAlg property.
let Ok(encoded) = priv_key.get_pkcs8_encrypted_enc("base64", &password) else {
    println!("{}", priv_key.last_error_text());
    return;
};

println!("{}", encoded);