L6NPKCj2

1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Security.Cryptography;
6
7/**
8 *
9 * @author fguaman
10 */
11public abstract class AES
12{
13    public static String doEncryptAES(String plainText, String key)
14    {
15        var plainBytes = Encoding.UTF8.GetBytes(plainText);
16        return Convert.ToBase64String(Encrypt(plainBytes, getRijndaelManaged(key)));
17    }
18
19    public static String doDecryptAES(String encryptedText, String key)
20    {
21        var encryptedBytes = Convert.FromBase64String(encryptedText);
22        return Encoding.UTF8.GetString(Decrypt(encryptedBytes, getRijndaelManaged(key)));
23    }
24
25    private static RijndaelManaged getRijndaelManaged(String secretKey)
26    {
27        var keyBytes = new byte[16];
28        var secretKeyBytes = Encoding.UTF8.GetBytes(secretKey);
29        Array.Copy(secretKeyBytes, keyBytes, Math.Min(keyBytes.Length, secretKeyBytes.Length));
30        return new RijndaelManaged
31        {
32            Mode = CipherMode.CBC,
33            Padding = PaddingMode.PKCS7,
34            KeySize = 128,
35            BlockSize = 128,
36            Key = keyBytes,
37            IV = keyBytes
38        };
39    }
40
41    private static byte[] Encrypt(byte[] plainBytes, RijndaelManaged rijndaelManaged)
42    {
43        return rijndaelManaged.CreateEncryptor()
44            .TransformFinalBlock(plainBytes, 0, plainBytes.Length);
45    }
46
47    private static byte[] Decrypt(byte[] encryptedData, RijndaelManaged rijndaelManaged)
48    {
49        return rijndaelManaged.CreateDecryptor()
50            .TransformFinalBlock(encryptedData, 0, encryptedData.Length);
51    }
52
53}