Use same PHP encrypt method as in Java

Question

I've made this PHP encrypt script. Now I was wondering how this could be done in Java. I was considering giving this up, and coding it in Javascript so it could be used in both languages. This is unfortunately not what I want. How can I do so in Java?

<?php
 $encrypted = encrypt("Hello goodbye", "Pizza");
 $decrypted = decrypt($encrypted, "Pizza");
 echo $encrypted;
 echo "<br/>";
 echo $decrypted;
 function encrypt($string, $key) {
 $result = '';
 for($i=0; $i<strlen($string); $i++) {
 $char = substr($string, $i, 1);
 $keychar = substr($key, ($i % strlen($key))-1, 1);
 $char = chr(ord($char)+ord($keychar));
 $result.=$char;
 }
 return base64_encode($result);
 }
 function decrypt($string, $key) {
 $result = '';
 $string = base64_decode($string);
 for($i=0; $i<strlen($string); $i++) {
 $char = substr($string, $i, 1);
 $keychar = substr($key, ($i % strlen($key))-1, 1);
 $char = chr(ord($char)-ord($keychar));
 $result.=$char;
 }
 return $result;
 }
?>

I am not asking to write some code for me (but it would be great), but I would like to be helped or get a push in the right direction

EDIT: I do not want to post and get to the PHP file via Java

• Goro: you can check this out if it helps : docs.oracle.com/javase/8/docs/api/java/util/Base64.html
• Margaret Bloom: This is not even encryption, just implementing some scrambling in Java. As this is not a code service, please post the java code.
• Jason: @MargaretBloom I don't even have the Java code, as I have no idea how to do so.
• Margaret Bloom: In such case, the best course of actions is deleting this question and looking for help on some Java forum. Once you have the code you are welcome to ask a new question here, granted it satisfy the on topic guidelines (help center)

Answer 1

import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class AdvanceEncryptionSecurity {
 private static final String ALGORITHM = "AES";
 private static final int ITERATIONS = 2;
 private static final byte[] keyValue = new byte[] { 'P', 'R', 'S', 'a', 'n', 'd', 'A', 'P', 'F', 'A', 'A', 'l', 'l', 'i', 'e', 'd' };
 private static String salt = "prs and pfa";
 public static String encrypt(String value) throws Exception {
 Key key = generateKey();
 Cipher c = Cipher.getInstance(ALGORITHM); 
 c.init(Cipher.ENCRYPT_MODE, key);
 String valueToEnc = null;
 String eValue = value;
 for (int i = 0; i < ITERATIONS; i++) {
 valueToEnc = salt + eValue;
 byte[] encValue = c.doFinal(valueToEnc.getBytes());
 eValue = new BASE64Encoder().encode(encValue);
 }
 return eValue;
 }
 public static String decrypt(String value) throws Exception {
 Key key = generateKey();
 Cipher c = Cipher.getInstance(ALGORITHM);
 c.init(Cipher.DECRYPT_MODE, key);
 String dValue = null;
 String valueToDecrypt = value;
 for (int i = 0; i < ITERATIONS; i++) {
 byte[] decordedValue = new BASE64Decoder().decodeBuffer(valueToDecrypt);
 byte[] decValue = c.doFinal(decordedValue);
 dValue = new String(decValue).substring(salt.length());
 valueToDecrypt = dValue;
 }
 return dValue;
 }
 private static Key generateKey() throws Exception {
 Key key = new SecretKeySpec(keyValue, ALGORITHM);
 return key;
 }
}

Try this code. It can encrypt and decrypt. I'm assuming you know how to code in java.

• Jason: I am using it on android java so it can't import sun.misc.BASE64Decoder and encoder
• Jason: I solved the import error. How can I provide a key myself or something like that? Because I'm not receiving the same encrypted phrase as when I'm encrypting it with PHP
• msagala25: We have different algo that's why we don't have the same encrypted phrase.

Answer 2

This GitHub repository solved it: Android PHP Encrypt Decrypt