256位AES加密和解密

  /// <summary>
         /// 256位AES加密
         /// </summary>
         /// <param name="toEncrypt"></param>
         /// <returns></returns>
         public static string Encrypt(string toEncrypt, string skey, string IV)
         {
             //256-AES key
             //byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678123456781234567812345678");
             byte[] keyArray = UTF8Encoding.UTF8.GetBytes(skey);
             byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
             byte[] ivArray = UTF8Encoding.UTF8.GetBytes(IV);//

             RijndaelManaged rDel = new RijndaelManaged();
             rDel.Key = keyArray;
             rDel.Mode = CipherMode.CBC;
             rDel.Padding = PaddingMode.PKCS7;
             rDel.IV = ivArray;

             ICryptoTransform cTransform = rDel.CreateEncryptor();
             byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

             return Convert.ToBase64String(resultArray, , resultArray.Length);
         }

 /// <summary>
        /// 256位AES解密
        /// </summary>
        /// <param name="toDecrypt"></param>
        /// <returns></returns>
        public static string Decrypt(string toDecrypt, string skey, string IV)
        {
            //256-AES key
            //byte[] keyArray = UTF8Encoding.UTF8.GetBytes("12345678123456781234567812345678");
            byte[] keyArray = UTF8Encoding.UTF8.GetBytes(skey);
            byte[] toDecryptArray = Convert.FromBase64String(toDecrypt);
            byte[] ivArray = UTF8Encoding.UTF8.GetBytes(IV); //

            RijndaelManaged rDel = new RijndaelManaged();
            rDel.Key = keyArray;
            rDel.Mode = CipherMode.CBC;
            rDel.Padding = PaddingMode.PKCS7;
            rDel.IV = ivArray;

            ICryptoTransform cTransform = rDel.CreateDecryptor();
            byte[] resultArray = cTransform.TransformFinalBlock(toDecryptArray, , toDecryptArray.Length);

            return UTF8Encoding.UTF8.GetString(resultArray);
        }