import javax.crypto.Cipher;
import java.util.Scanner;
import javax.crypto.spec.SecretKeySpec;
 
public class blowfish
{
public static byte[] encrypt(byte[] plaintext ,byte[]key) throws Exception
{
 Cipher cipher=Cipher.getInstance("blowfish");
 cipher.init(Cipher.ENCRYPT_MODE,new SecretKeySpec(key,"blowfish"));
 return cipher.doFinal(plaintext);
 }
 public static byte[] decrypt(byte[] ciphertext ,byte[]key) throws Exception
{
 Cipher cipher=Cipher.getInstance("blowfish");
 cipher.init(Cipher.DECRYPT_MODE,new SecretKeySpec(key,"blowfish"));
 return cipher.doFinal(ciphertext);
 }
 
     public static void main(String args[])
     {
     byte[]key="my secret key".getBytes();
     Scanner sc=new Scanner(System.in);
     System.out.println("enter the plaintext");
     byte[]plaintext=sc.nextLine().getBytes();
     byte[]ciphertext=encrypt(plaintext,key);
     System.out.println("Ciphertext:"+new String(ciphertext));
     byte[]decrypted=decrypt(ciphertext,key);
     System.out.println("Decrypted:"+new String(decrypted));
     }}
 
 

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