简单的加密解密

加密解密随记

        private void demo(HttpContext context)
        {
            string key = "xxxxx";//key值
            string body="xxxx";
            try
            {
                //body加密
                string body = Decrypt.Encrypt3DESToBase64(body, key);
                //sign加密
                string sign = Decrypt.sign("xxxx");

                string str = "{ "sign": "" + sign + "", "body": "" + body +"" }";
                string paraUrlCoded = System.Web.HttpUtility.UrlEncode("json");
                paraUrlCoded += "=" + System.Web.HttpUtility.UrlEncode(str);
                // 第三方接口获取数据
                //拼接URL
                string serviceUrl = "xxxxxx";//第三方接口
                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(serviceUrl);
                //post请求
                myRequest.Method = "POST";
                //utf-8编码
                byte[] buf = System.Text.Encoding.GetEncoding("UTF-8").GetBytes(paraUrlCoded);
                myRequest.ContentLength = buf.Length;
                myRequest.Timeout = 5000;
                //指定为json否则会出错
                myRequest.ContentType = "application/x-www-form-urlencoded";
                myRequest.MaximumAutomaticRedirections = 1;
                myRequest.AllowAutoRedirect = true;
                Stream newStream = myRequest.GetRequestStream();
                newStream.Write(buf, 0, buf.Length);
                newStream.Close();
                //获得接口返回值
                HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
                StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
                string strResult = reader.ReadToEnd();
                reader.Close();
                myResponse.Close();
                
                JObject jo = (JObject)JsonConvert.DeserializeObject(strResult);
                string zone = jo["body"].ToString();

                //body解密
                string bodyDecrypt = Encrypt.Decrypt3DESFromBase64(zone, key);
                context.Response.Write(bodyDecrypt);
                return;
            }
            catch (Exception ex)
            {
                string str = "{ " + ex + ",失败 }";
                context.Response.Write(str);
                return;
            }
        }

 public class Decrypt
    {
        public static string Encrypt3DESToBase64(string strEncrypt, string strKey)
        {
            return ToBase64(Encrypt3DES(Encoding.UTF8.GetBytes(strEncrypt), strKey));
        }

        public static byte[] Encrypt3DES(byte[] arrEncrypt, string strKey)
        {
            ICryptoTransform DESEncrypt = null;
            try
            {
                TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();

                DES.Key = ASCIIEncoding.ASCII.GetBytes(strKey);
                DES.Mode = CipherMode.ECB;

                DESEncrypt = DES.CreateEncryptor();
            }
            catch (System.Exception e)
            {
                return null;
            }

            return DESEncrypt.TransformFinalBlock(arrEncrypt, 0, arrEncrypt.Length);
        }

        public static string ToBase64(byte[] str)
        {
            return Convert.ToBase64String(str);
        }


    }

　　

public class Encrypt
    {

        public static string Decrypt3DESFromBase64(string strDecrypt, string strKey)
        {
            return Encoding.UTF8.GetString(Decrypt3DES(FromBase64(strDecrypt), strKey));
        }
        public static byte[] FromBase64(string str)
        {
            return Convert.FromBase64String(str);
        }

        public static byte[] Decrypt3DES(byte[] arrDecrypt, string strKey)
        {
            ICryptoTransform DESDecrypt = null;
            try
            {
                TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();

                DES.Key = ASCIIEncoding.ASCII.GetBytes(strKey);
                DES.Mode = CipherMode.ECB;
                DES.Padding = System.Security.Cryptography.PaddingMode.PKCS7;

                DESDecrypt = DES.CreateDecryptor();
            }
            catch (System.Exception e)
            {
                return null;
            }

            return DESDecrypt.TransformFinalBlock(arrDecrypt, 0, arrDecrypt.Length);
        }



    }