Encryption/Decryption with Twofish

Question

I am trying encrypt and decrypt using TWOFISH. I received the error: Exception in thread "main" java.security.NoSuchAlgorithmException: twofish KeyGenerator not available

My code:

public class TWOFISH {

    public static byte[] encrypt(String toEncrypt, String key) throws Exception {
      // create a binary key from the argument key (seed)
      SecureRandom sr = new SecureRandom(key.getBytes());
      KeyGenerator kg = KeyGenerator.getInstance("twofish");
      kg.init(sr);
      SecretKey sk = kg.generateKey();

      // create an instance of cipher
      Cipher cipher = Cipher.getInstance("twofish");

      // initialize the cipher with the key
      cipher.init(Cipher.ENCRYPT_MODE, sk);

      // enctypt!
      byte[] encrypted = cipher.doFinal(toEncrypt.getBytes());

      return encrypted;
   }

   public static String decrypt(byte[] toDecrypt, String key) throws Exception {
      // create a binary key from the argument key (seed)
      SecureRandom sr = new SecureRandom(key.getBytes());
      KeyGenerator kg = KeyGenerator.getInstance("twofish");
      kg.init(sr);
      SecretKey sk = kg.generateKey();

      // do the decryption with that key
      Cipher cipher = Cipher.getInstance("twofish");
      cipher.init(Cipher.DECRYPT_MODE, sk);
      byte[] decrypted = cipher.doFinal(toDecrypt);

      return new String(decrypted);
   }
}

Answer 1

KeyGenerator kg = KeyGenerator.getInstance(String algorithm);

According to

https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#KeyGenerator

the accepted String value of the parameter algorithm does not include "twofish", hence the exception.