Java

Load ECC Private Key from JWK Format (JSON Web Key)

See more ECC Examples

Demonstrates how to load an ECC private key from 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;

public class ChilkatExample {

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

        // First build a JWK sample to load..
        JsonObject json = new JsonObject();
        json.updateString("kty", "EC");
        json.updateString("crv", "P-256");
        json.updateString("x", "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE");
        json.updateString("y", "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU");
        json.updateString("d", "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM");

        // The JSON contains the following:
        // {
        //   "kty": "EC",
        //   "crv": "P-256",
        //   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
        //   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
        //   "d": "EbVzfPnZPxfAyxqEZV05laAoJAl-_6Xt2O4mOB611sM"
        // }

        // Note: The JSON can contain other members, such as "use", "kid", or anything else.  These will be ignored.
        json.setEmitCompact(false);

        // Show the JWK string to be loaded:
        String jwkStr = json.emit();

        PrivateKey privKey = new PrivateKey();
        try {
            privKey.loadJwk(jwkStr);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // OK.. the JWK is loaded.  It can be used in whatever way desired...

        // The key can be retrieved in any other format, such as XML or PEM..
        System.out.println(privKey.getXml());

        // XML output:
        // <ECCKeyValue curve="secp256r1">MHcCAQEEIBG1c3z52T8XwMsahGVdOZWgKCQJfv+l7djuJjgetdbDoAoGCCqGSM49AwEHoEQDQgAEoBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxG+9DLFmRSMlBQ9T/RsLLc+PmpB1+7yPAR+oR5gZn3kJQ==</ECCKeyValue>

        System.out.println(privKey.getPkcs8EncryptedPem("secret"));

        // PEM output
        //
        // -----BEGIN ENCRYPTED PRIVATE KEY-----
        // MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAiku9rUjavLQQICCAAw
        // FAYIKoZIhvcNAwcECGsl/5nLai+JBIGAVIqKAdfcRQNLl1t3x+n8OZ92d1H+qgjS
        // Hs83wn2joJK4nlqy+rzosZxQ3e8NTJQyUEWZWcjqMj/N0phS3QWtcD/qbda5oEcv
        // QgtU60cZ4ql3truefAmlZz2PdpOfqtYhxlvjJQxnyojn4ntj69OwLOt9SZbaBQQi
        // KUL8KXT4Pq8=
        // -----END ENCRYPTED PRIVATE KEY-----
    }
}