Access WebApi using C# secured by certificate

Accessing the Webapi using the C# code and that WebApi is having SSL security.

Step 1: You have to install the SSL certificate into your local system and that you can check into MMC.

You should have the pfx file to install the certificate; you can follow the below steps to install certificates.

Step 2: You have to read the certificate by the thumbprint or by name, pass it to your code header like below; Code snippet to read the certificate as:

Need to import below namespace; using System.Security.Cryptography.X509Certificates;

/// <summary>

        /// Creating the certifactes

        /// </summary>

        /// <returns></returns>

        private static X509Certificate GetClientCert()

        {

            X509Store store = null;

            try

            {

                store = new X509Store(StoreName.My, StoreLocation.LocalMachine);

                store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadOnly);

                /// Getting certificate by thumbprint

                var certs = store.Certificates.Find(X509FindType.FindByThumbprint, "8e6cb255856e123457c3c395d12345758c0bf9b9", true); /// Generating the

                                                                                                                                      ///

               /// getting thye certificate by name  need to pass full name

                var certName = store.Certificates.Find(X509FindType.FindBySubjectName, "mycert.com", true); /// Generating the

                if (certs.Count == 1)

                {

                    var cert = certs[0];

                    return cert;

                }

            }

            finally

            {

                if (store != null)

                    store.Close();

            }

            return null;

        }

Step 3:  Asyn code to call the web api by passing the certificates and partner header,;

/// <summary>

        /// Calling the get sub to access the webapi

        /// </summary>

        /// <returns></returns>

        public static async Task<GetPIDetail> GetSub()

        {

            /// Please check with the WEB api url and the way of paramter passing it can be like https://getmscode/api/v1/Commerce/CustorDetail/1106671338454426

             HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://getmscode/api/v1/Commerce/CustorDetail?puid=1106671338454426"); // Pass the API URL

            request.ContentType = "application/json";

            request.ClientCertificates.Add(GetClientCert());

            request.Headers.Add("x-partnername", "SOME"); /// If there is any partner type that you need to pass from header

            try

            {

                List<GetPIDetail> objdeviceService = new List<GetPIDetail>();

              

                using (WebResponse webResponse = await request.GetResponseAsync())

                {

                    using (Stream webStream = webResponse.GetResponseStream())

                    {

                        StreamReader responseReader = new StreamReader(webStream);

                        string response =  await responseReader.ReadLineAsync();

                      

                        objdeviceService = Newtonsoft.Json.JsonConvert.DeserializeObject<List<GetPIDetail>>(response);

                    }

                }

                return objdeviceService.FirstOrDefault();

             

            }

            catch (WebException we)

            {

                string webExceptionMessage = we.Message;

            }

            return null;

        }

Step 4: Calling of above method to get the records.

  private static async Task Convert()

        {

            var value = await GetSub();

            string val = string.Empty;

            if(value != null)

            {

                 val = value.AccountId;

            }

            else

            {

                val = "it is null";

            }

            Console.WriteLine(val);

        }