ERK3PfsB

1import javax.crypto.*;
2import javax.crypto.spec.SecretKeySpec;
3import java.nio.charset.StandardCharsets;
4import java.security.InvalidKeyException;
5import java.security.NoSuchAlgorithmException;
6
7public class Crypto
8{
9    public static final String ALGORITHM_DES = "DES";
10    public static final String ALGORITHM_3DES = "DESede";
11    public static final String ALGORITHM_AES = "AES";
12
13    public static Encrypted encrypt(String text, String encryption)
14    {
15        try
16        {
17            //Generate key
18            KeyGenerator keyGenerator = KeyGenerator.getInstance(encryption);
19            SecretKey desKey = keyGenerator.generateKey();
20
21            //Initialize cipher
22            Cipher desCipher = Cipher.getInstance(encryption);
23            desCipher.init(Cipher.ENCRYPT_MODE, desKey);
24
25            //Convert text to byte array
26            byte[] bytes = text.getBytes(StandardCharsets.UTF_8);
27
28            //Encrypt
29            byte[] encryptedBytes = desCipher.doFinal(bytes);
30
31            return new Encrypted(encryptedBytes, desKey.getEncoded(), encryption);
32        }
33        catch(NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e)
34        {
35            e.printStackTrace();
36        }
37
38        return null;
39    }
40
41    public static String decrypt(byte[] encryptedText, byte[] key, String encryption)
42    {
43        try
44        {
45            //Convert key
46            SecretKey desKey = new SecretKeySpec(key, 0, key.length, encryption);
47
48            //Initialize cipher
49            Cipher desCipher = Cipher.getInstance(encryption);
50            desCipher.init(Cipher.DECRYPT_MODE, desKey);
51
52            //Decrypt
53            byte[] decryptedBytes = desCipher.doFinal(encryptedText);
54
55            return new String(decryptedBytes);
56        }
57        catch(NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e)
58        {
59            e.printStackTrace();
60        }
61
62        return null;
63    }
64}