Java

Load a Private Key from a File (Any Format)

Demonstrates the Chilkat PrivateKey.LoadAnyFormatFile method, which loads a private key from a file by inspecting its contents. The first argument is the file path and the second is the password (used if the detected key is encrypted).

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 key file.

Background: This is the most convenient loader of all — point it at a key file whose format you do not know and it detects and loads it, whether PKCS #1/#8, encrypted PKCS #8, PEM, JWK, XML, or a Microsoft format. It is the pragmatic default for applications that accept keys from users or varied sources; use a format-specific loader only when you want to enforce a particular expected format.

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

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates the PrivateKey.LoadAnyFormatFile method, which loads a private key from a file by
        // inspecting its contents.  The 1st argument is the file path and the 2nd is the password (used
        // if the detected key is encrypted).

        PrivateKey privKey = new PrivateKey();

        // 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";

        // This is the most convenient loader when the file's exact format is unknown: Chilkat inspects
        // the content and handles PKCS #1/#8, encrypted PKCS #8, PEM, JWK, XML, Microsoft formats, etc.
        try {
            privKey.loadAnyFormatFile("qa_data/some_private_key", password);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Loaded a " + privKey.getKeyType() + " private key.");
    }
}