Encrypt / decrypt URL with Blowfish + Base64

D2SDataProtection.java

package com.company;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.security.GeneralSecurityException;
import org.apache.commons.codec.binary.Base64;

/**
 *
 * D2SDataProtection.encrypt("http://example.com/image.png", "SD88-4Si-oVJ") =>
 * "ciK954e/FLZJKuEMFsfynyTSGt/xOP4ubn7rU/uUTTg="
 *
 */
public class D2SDataProtection {

    private static Cipher blowfish(int mode, String secret) throws GeneralSecurityException {
        SecretKeySpec keySpec = new SecretKeySpec(secret.getBytes(), "Blowfish");
        Cipher cipher = Cipher.getInstance("Blowfish");
        cipher.init(mode, keySpec);
        return cipher;
    }

    public static String encrypt(String url, String secret) throws GeneralSecurityException {
        Cipher cipher = blowfish(Cipher.ENCRYPT_MODE, secret);
        return new String(Base64.encodeBase64(cipher.doFinal(url.getBytes())));
    }

    public static String decrypt(String encryptedURL, String secret) throws GeneralSecurityException {
        Cipher cipher = blowfish(Cipher.DECRYPT_MODE, secret);
        return new String(cipher.doFinal(Base64.decodeBase64(encryptedURL)));
    }

}