Java

Save a Private Key as an Encrypted PKCS #8 PEM File

Demonstrates the Chilkat PrivateKey.SavePkcs8EncryptedPemFile method, which saves the key as password-protected PKCS #8 PEM (the ENCRYPTED PRIVATE KEY label). The first argument is the password and the second is the destination path.

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: The text (PEM) form of an encrypted saved key — portable across systems and safe to store because the private material is protected by a passphrase. It is the encrypted counterpart to SavePkcs8PemFile and a good default for keys kept in configuration or version-controlled deployment repositories. Source the password securely.

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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.PrivateKey;

public class ChilkatExample {

    public static void main(String[] args) {
        // Load a private key to export.
        PrivateKey privKey = new PrivateKey();
        try {
            privKey.loadPemFile("qa_data/private.pem");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        // Save as password-protected PKCS #8 PEM (the "ENCRYPTED PRIVATE KEY" label).  The 1st argument
        // is the password and the 2nd is the destination path.
        try {
            privKey.savePkcs8EncryptedPemFile(password, "qa_output/private_pkcs8_enc.pem");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Saved (encrypted).");
    }
}