264-c# AES解密

        /// <summary>
        /// AES解密 
        /// </summary> 
        /// <param name=input>密文字节数组</param> 
        /// <param name=key>密钥（16位）</param> 
        /// <returns>返回解密后的字符串</returns> 
        public static string DecryptByAES(string input, string key)
        {
            byte[] inputBytes = Convert.FromBase64String(input);
            byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 16));
            using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
            {
                aesAlg.Padding = PaddingMode.PKCS7;
                aesAlg.Mode = CipherMode.ECB;
                aesAlg.Key = keyBytes;
                aesAlg.IV = keyBytes;
                ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
                using (MemoryStream msEncrypt = new MemoryStream(inputBytes))
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srEncrypt = new StreamReader(csEncrypt))
                        {
                            return srEncrypt.ReadToEnd();
                        }
                    }
                }
            }
        }