6sYPVXaA

1import javax.crypto.Cipher;
2import java.security.spec.KeySpec;
3import javax.crypto.spec.PBEKeySpec;
4import javax.crypto.SecretKey;
5import javax.crypto.spec.SecretKeySpec;
6import javax.crypto.SecretKeyFactory;
7import javax.crypto.spec.IvParameterSpec;
8import java.util.Base64;
9
10
11public class Decrypter {
12    Cipher dcipher;
13
14    byte[] salt = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
15    int iterationCount = 1024;
16    int keyStrength = 16 * 8;
17    SecretKey key;
18    byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
19
20    Decrypter(String passPhrase) throws Exception {
21        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
22        KeySpec spec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount, keyStrength);
23        SecretKey tmp = factory.generateSecret(spec);
24        key = new SecretKeySpec(tmp.getEncoded(), "AES");
25        dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
26    }
27
28    public String decrypt(String base64EncryptedData) throws Exception {
29        dcipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
30        byte[] decryptedData = Base64.getDecoder().decode(base64EncryptedData);
31        byte[] utf8 = dcipher.doFinal(decryptedData);
32        return new String(utf8, "UTF8");
33    }
34
35    public static void main(String args[]) throws Exception {
36        String encrypted = Base64.getEncoder().encodeToString(Base64.getUrlDecoder().decode(("cWKz2Ajf8LPntPBqGdwIZT-3TxXKw40wCahYJRPGKzWzz2mHacBCTnoy43LOc1bZ0OoaVK734Azc_LsQd--Hl_VI_tCjF4-67-7-frheoK5m5ViaShI9n--nfAex2Jin").getBytes()));
37        String decrypted;
38        for (int i = 0; i <= 9999; i++) {
39            String code = String.valueOf(i);
40            try {
41                decrypted = new Decrypter(code).decrypt(encrypted);
42                System.out.println(decrypted);
43            } catch(javax.crypto.BadPaddingException j) {
44            }
45        }
46    }
47}