/// <summary>AES加密</summary>

/// <param name="text">明文</param>

/// <param name="key">密钥,长度为16的字符串</param>

/// <param name="iv">偏移量,长度为16的字符串</param>

/// <returns>密文</returns>

public static string EncodeAES(string text, string key,string iv)

{

    RijndaelManaged rijndaelCipher = new RijndaelManaged();

    rijndaelCipher.Mode = CipherMode.CBC;

    rijndaelCipher.Padding = PaddingMode.Zeros;

    rijndaelCipher.KeySize = 128;

    rijndaelCipher.BlockSize = 128;

    byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);

    byte[] keyBytes = new byte[16];

    int len = pwdBytes.Length;

    if (len > keyBytes.Length)

        len = keyBytes.Length;

    System.Array.Copy(pwdBytes, keyBytes, len);

    rijndaelCipher.Key = keyBytes;

    rijndaelCipher.IV = Encoding.UTF8.GetBytes(iv);

    ICryptoTransform transform = rijndaelCipher.CreateEncryptor();

    byte[] plainText = Encoding.UTF8.GetBytes(text);

    byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);

    return Convert.ToBase64String(cipherBytes);

}  

/// <summary>AES解密</summary>

/// <param name="text">密文</param>

/// <param name="key">密钥,长度为16的字符串</param>

/// <param name="iv">偏移量,长度为16的字符串</param>

/// <returns>明文</returns>

public static string DecodeAES(string text, string key,string iv)

{

    RijndaelManaged rijndaelCipher = new RijndaelManaged();

    rijndaelCipher.Mode = CipherMode.CBC;

    rijndaelCipher.Padding = PaddingMode.Zeros;

    rijndaelCipher.KeySize = 128;

    rijndaelCipher.BlockSize = 128;

    byte[] encryptedData = Convert.FromBase64String(text);

    byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);

    byte[] keyBytes = new byte[16];

    int len = pwdBytes.Length;

    if (len > keyBytes.Length)

        len = keyBytes.Length;

    System.Array.Copy(pwdBytes, keyBytes, len);

    rijndaelCipher.Key = keyBytes;

    rijndaelCipher.IV = Encoding.UTF8.GetBytes(iv);

    ICryptoTransform transform = rijndaelCipher.CreateDecryptor();

    byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);

    return Encoding.UTF8.GetString(plainText);

}  

/**

 * @author miracle.qu

 * @see AES算法加密明文

 * @param data 明文

 * @param key 密钥，长度16

 * @param iv 偏移量，长度16

 * @return 密文

 */

  public static String encryptAES(String data,String key,String iv) throws Exception {

        try {

            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

            int blockSize = cipher.getBlockSize();

            byte[] dataBytes = data.getBytes();

            int plaintextLength = dataBytes.length;  

            if (plaintextLength % blockSize != 0) {

                plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));

            }  

            byte[] plaintext = new byte[plaintextLength];

            System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);  

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");

            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());  

            cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);

            byte[] encrypted = cipher.doFinal(plaintext);  

            return Base64Helper.encode(encrypted).trim();  

        } catch (Exception e) {

            e.printStackTrace();

            return null;

        }

    }  

    /**

     * @author miracle.qu

     * @see AES算法解密密文

     * @param data 密文

     * @param key 密钥，长度16

     * @param iv 偏移量，长度16

     * @return 明文

     */

    public static String decryptAES(String data,String key,String iv) throws Exception {

        try

        {

            byte[] encrypted1 = Base64Helper.decode(data);  

            Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");

            SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");

            IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());  

            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);  

            byte[] original = cipher.doFinal(encrypted1);

            String originalString = new String(original);

            return originalString.trim();

        }

        catch (Exception e) {

            e.printStackTrace();

            return null;

        }

    }  

/**

 * 编码

 * @param byteArray

 * @return

 */

   public static String encode(byte[] byteArray) {

       return new String(new Base64().encode(byteArray));

   }  

   /**

    * 解码

    * @param base64EncodedString

    * @return

    */

   public static byte[] decode(String base64EncodedString) {

    return new Base64().decode(base64EncodedString);

   }