AES加密

 private static string AES_KEY = "80f4kwSR45gY4rPU6YWxnIbqKT87lF93"; //傳入加密方法中
 private static string AES_IV = ""; //傳入加密方法中
 /// <summary>
 /// AES加密
 /// </summary>
 /// <param name="msg">明文</param>
 /// <param name="key">金鑰</param>
 /// <param name="iv">向量，暫時無用</param>
 

 /// <returns>返回BASE64的密文</returns>
 private static string AesEncrypt(string msg,string key,string iv) {
            string encryptMsg = "";
            byte[] byteKey = Encoding.UTF8.GetBytes(key);
            //byte[] byteIv = Encoding.UTF8.GetBytes(iv);
            byte[] encrypted;
            using (
 
Aes aes = Aes.Create()) {
                aes.Key = byteKey;
                //aes.IV = byteIv;
                aes.Mode = CipherMode.ECB;
                aes.Padding = PaddingMode.PKCS7;
                ICryptoTransform encryptor = aes.CreateEncryptor();
                using (MemoryStream msEncrypt =
 
 new MemoryStream()) {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, 
                    encryptor, CryptoStreamMode.Write)) {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)){
                            swEncrypt.Write(msg);
                        }
                        encrypted = msEncrypt.ToArray();
                        encryptMsg = Convert.ToBase64String(encrypted);
                    }
                }
            }
            return encryptMsg;
        }

AES解密

 private static string AES_KEY = "80f4kwSR45gY4rPU6YWxnIbqKT87lF93"; //傳入解密方法中
 private static string AES_IV = ""; //傳入解密方法中
 /// <summary>
 /// AES解密
 /// </summary>
 /// <param name="msg">密文，格式需要BASE64的格式</param>
 /// <param name="key">金鑰</param>
 /// <param name="iv">向量，暫時無用</param>
 /// <returns>解密後的明文</returns>
 private static string AesDecrypt(string msg, string key, string iv)
        {
            string dncryptMsg = "";
            byte[] byteKey = Encoding.UTF8.GetBytes(key);
            //byte[] byteIv = Encoding.UTF8.GetBytes(iv);
            byte[] byteMsg = Convert.FromBase64String(msg) ;
            using (Aes aes = Aes.Create())
            {
                aes.Key = byteKey;
                //aes.IV = byteIv;
                aes.Mode = CipherMode.ECB;
                aes.Padding = PaddingMode.PKCS7;
                ICryptoTransform decryptor = aes.CreateDecryptor();
                
                using (MemoryStream msDecrypt = new MemoryStream(byteMsg))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, 
                    decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                        {
                            dncryptMsg = srDecrypt.ReadToEnd();
                        }
                    }
                }
            }
            return dncryptMsg;
        }

MD5加密

/// <summary>
/// MD5加密
/// </summary>
/// <param name="msg">明文</param>
/// <returns>密文</returns>
 private static string Md5Encrypt(string msg) {
            string encryptMsg = "";
            MD5 md5 = MD5.Create();
            byte[] bytes = md5.ComputeHash(Encoding.UTF8.GetBytes(msg));
            //BitConverter.ToString(bytes,4,8);生成的是16位密文，不使用ToLower（）則是大寫
            encryptMsg = BitConverter.ToString(bytes).Replace("-","").ToLower();
            return encryptMsg;
        }