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package hasherv2;

import java.security.InvalidKeyException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;

/**
 *
 * @author Taury55
 */
public class HasherV2 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws NoSuchAlgorithmException, InvalidKeyException, SignatureException {
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
        keyPairGenerator.initialize(512);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();

        PublicKey publicKey = keyPair.getPublic();
        PrivateKey privateKey = keyPair.getPrivate();

        Signature signGenerator = Signature.getInstance("SHA1withRSA");
        signGenerator.initSign(privateKey);

        String msg = "Hello World";

        signGenerator.update(msg.getBytes());

        byte[] podpis = signGenerator.sign();

        byte[] key = publicKey.getEncoded();

        System.out.println(msg);
        for (byte c : podpis) {
            System.out.format("%02x", c);
        }
        System.out.println();
        for (byte a : key) {
            System.out.format("%02x", a);
        }
        System.out.println();

    }

}