Java Requires Chilkat v11.0.0+

Generate an ECC Key (Public and Private)

See more ECC Examples

Demonstrates how to generate an ECC key and save both public and private parts. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Ecc;
import com.chilkatsoft.chilkat2.PrivateKey;
import com.chilkatsoft.chilkat2.Prng;
import com.chilkatsoft.chilkat2.PublicKey;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // Create a Fortuna PRNG and seed it with system entropy.
        // This will be our source of random data for generating the ECC private key.
        Prng fortuna = new Prng();
        String entropy = fortuna.getEntropy(32, "base64");
        fortuna.addEntropy(entropy, "base64");

        Ecc ecc = new Ecc();

        // Generate a random ECC private key on the secp256r1 curve.
        // Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

        PrivateKey privKey = new PrivateKey();
        try {
            ecc.genKey("secp256r1", fortuna, privKey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Save the private key to PKCS8 encrypted PEM
        // (The private key can be saved in a variety of different formats. See the online reference documentation.)
        try {
            privKey.savePkcs8EncryptedPemFile("pemPassword", "qa_output/eccPrivKey.pem");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
        }

        // The private key PEM looks like this:

        //     -----BEGIN ENCRYPTED PRIVATE KEY-----
        //     MIHFMEAGCSqGSIb3DQEFDTAzMBsGCSqGSIb3DQEFDDAOBAhUmn+1/lwCIwICCAAw
        //     FAYIKoZIhvcNAwcECPlyNXAXZO+oBIGAIvxvTENXJWbrCwSjh0QNxLecBotUpfI5
        //     auOonLmwVMyt1ahMmNyVo/D+pnKQSE41Fg8fApM0DCDKZUOVCCcK1qirIsMPQkGp
        //     klPJbvrQRVYgzBtU31uNB5y2wqhrIeepal1HXBvbkUK0nfJMbcdz/XAEIQu2HhTD
        //     t6LMScPQld4=
        //     -----END ENCRYPTED PRIVATE KEY-----

        // Now get the public key part from the private key.
        // (A public key is actually a subset of the private key.)
        PublicKey pubKey = new PublicKey();
        privKey.toPublicKey(pubKey);

        // Save the public key to a PEM file.
        // (The public key can be saved in a variety of different formats. See the online reference documentation.)
        // For ECC keys, the 1st argument (bPreferPkcs1) is ignored and unused.
        boolean bPreferPkcs1 = false;
        pubKey.savePemFile(bPreferPkcs1, "qa_output/eccPubKey.pem");

        // The public key PEM looks like this:

        //     -----BEGIN PUBLIC KEY-----
        //     MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
        //     AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
        //     ///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
        //     NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
        //     RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
        //     //////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABGdOH8uM6SfX3mdV+TR0mWp2
        //     gfVRPlxWxwhOiowuNByBxmQz7ZR4CJY1XcN2zkUo5pzW73ZhGwgd2XTOvqPqG40=
        //     -----END PUBLIC KEY-----
        //

        System.out.println("finished.");
    }
}