c#加密-AES

        /// <summary>
        /// aes加密
        /// </summary>
        /// <param name="text"></param>
        /// <param name="key">秘钥</param>
        /// <param name="iv">偏移量</param>
        /// <returns></returns>
        public static string AESEncrypt(string text, string key, string iv)
        {
            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            rijndaelCipher.Mode = CipherMode.CBC;
            rijndaelCipher.Padding = PaddingMode.PKCS7;
            rijndaelCipher.KeySize = 128;
            rijndaelCipher.BlockSize = 128;
            byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
            byte[] keyBytes = new byte[pwdBytes.Length];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
                len = keyBytes.Length;
            System.Array.Copy(pwdBytes, keyBytes, len);
            rijndaelCipher.Key = keyBytes;
            byte[] ivBytes = Encoding.UTF8.GetBytes(iv);
            rijndaelCipher.IV = ivBytes;
            ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
            byte[] plainText = Encoding.UTF8.GetBytes(text);
            byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);
            //return Convert.ToBase64String(cipherBytes);
            return BitConverter.ToString(cipherBytes).Replace("-", "");
            //return Encoding.GetString(cipherBytes);
        }

        /// <summary>AES解密</summary>  
        /// <param name="text">ry密文</param>  
        /// <param name="key">ry密钥,长度为16的字符串</param>  
        /// <param name="iv">ry偏移量,长度为16的字符串</param>  
        /// <returns>明文</returns>  
        public static string AESDecrypt(string text, string key, string iv)
        {

            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            rijndaelCipher.Mode = CipherMode.CBC;
            rijndaelCipher.Padding = PaddingMode.PKCS7;
            rijndaelCipher.KeySize = 128;
            rijndaelCipher.BlockSize = 128;

            int count = text.Length / 2;
            string realText = string.Empty;
            for (int i = 0; i < count; i++)
            {
                string temp = text.Substring(2 * i, 2);
                realText += temp + "-";
            }
            realText = realText.Remove(realText.Length - 1, 1);
            String[] arr = realText.Split('-');
            byte[] encryptedData = new byte[arr.Length];
            for (int i = 0; i < arr.Length; i++) encryptedData[i] = Convert.ToByte(arr[i], 16);
            //byte[] encryptedData = Convert.FromBase64String(text);
            //byte[] encryptedData = Encoding.UTF8.GetBytes(text);
            //byte[] encryptedData = Encoding.Default.GetBytes(text);
            //Encoding.Default.GetBytes(text);
            //ry---
            byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key);
            byte[] keyBytes = new byte[pwdBytes.Length];
            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);
        }