import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
public class MainClass {
public static void main(String[] args) throws Exception {
KeyGenerator keyGenerator = KeyGenerator.getInstance("Blowfish");
keyGenerator.init(128);
Key blowfishKey = keyGenerator.generateKey();
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(1024);
KeyPair keyPair = keyPairGenerator.genKeyPair();
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
cipher.init(Cipher.ENCRYPT_MODE, keyPair.getPublic());
byte[] blowfishKeyBytes = blowfishKey.getEncoded();
System.out.println(new String(blowfishKeyBytes));
byte[] cipherText = cipher.doFinal(blowfishKeyBytes);
System.out.println(new String(cipherText));
cipher.init(Cipher.DECRYPT_MODE, keyPair.getPrivate());
byte[] decryptedKeyBytes = cipher.doFinal(cipherText);
System.out.println(new String(decryptedKeyBytes));
SecretKey newBlowfishKey = new SecretKeySpec(decryptedKeyBytes, "Blowfish");
}
}