Java

Get ECC Private Key in JWK Format (JSON Web Key)

See more ECC Examples

Demonstrates how to get an ECC private key in JWK (JSON Web Key) format.

Note: This example requires Chilkat v9.5.0.66 or later.

Chilkat2 Java

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

public class ChilkatExample {

    public static void main(String[] args) {
        // Note: This example requires Chilkat v9.5.0.66 or later.

        // Load a PEM file into memory.
        StringBuilder sbPem = new StringBuilder();
        try {
            sbPem.loadFile("qa_data/pem/ecc_privKey.pem", "utf-8");
        } catch (ChilkatException e) {
            System.out.println("Failed to load PEM file.");
            return;
        }

        // Load the PEM into a private key object.
        PrivateKey privKey = new PrivateKey();
        try {
            privKey.loadPem(sbPem.getAsString());
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Get the private key in JWK format:
        String jwk = privKey.getJwk();

        // The GetJwk method will return the JWK in the most compact JSON format possible,
        // as a single line with no extra whitespace.  To get a more human-readable JWK (for this example),
        // load into a Chilkat JSON object and emit non-compact:

        JsonObject json = new JsonObject();
        json.load(jwk);
        json.setEmitCompact(false);
        System.out.println("ECC Private Key in JWK format:");
        System.out.println(json.emit());

        // Sample output:
        // {
        //   "kty": "EC",
        //   "crv": "P-256",
        //   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
        //   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
        //   "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM"
        // }
        //

        // Additional information can be added like this:
        json.appendString("use", "enc");
        json.appendString("kid", "123ABC");

        // Now examine the JSON:
        System.out.println(json.emit());

        // {
        //   "kty": "EC",
        //   "crv": "P-256",
        //   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
        //   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
        //   "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM",
        //   "use": "enc",
        //   "kid": "123ABC"
        // }
    }
}