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Chamada APi Rest com autenticação via certificado

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Delphi_852

Boa Tarde,

Necessito fazer aplicação que faz pedido através da api Rest permita obter dados do servidor. Esta chamada utiliza autenticação através de um certificado digital...

porém não estou a conseguir... obtenho o seguinte erro: "The request was aborted: Could not create SSL/TLS secure channel.".. Alguém me pode ajudar??

Segue parte do meu código....

Appi.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>


  <system.net>
    
    <settings>
      
      <httpWebRequest useUnsafeHeaderParsing="true" />
    </settings>

    <defaultProxy>

      <proxy   bypassonlocal="True"  usesystemdefault="False" />

    </defaultProxy>


  </system.net>

</configuration>

 

 

public enum HttpVerb
{
    GET,
    POST,
    PUT,
    DELETE
}

namespace HttpUtils
{
    public class RestClient
    {
        public string EndPoint { get; set; }
        public HttpVerb Method { get; set; }
        public string ContentType { get; set; }
        public string PostData { get; set; }

        public RestClient()
        {
            EndPoint = "";
            Method = HttpVerb.GET;
            ContentType = "text/xml";
            PostData = "";
        }
        public RestClient(string endpoint)
        {
            EndPoint = endpoint;
            Method = HttpVerb.GET;
            ContentType = "text/xml";
            PostData = "";
        }
        public RestClient(string endpoint, HttpVerb method)
        {
            EndPoint = endpoint;
            Method = method;
            ContentType = "text/xml";
            PostData = "";
        }

        public RestClient(string endpoint, HttpVerb method, string postData)
        {
            EndPoint = endpoint;
            Method = method;
            ContentType = "text/xml";
            PostData = postData;
        }


        public string MakeRequest()
        {
            return MakeRequest("");
        }

        public string MakeRequest(string parameters)
        {

            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;


            var request = (HttpWebRequest)WebRequest.Create(EndPoint + parameters);

            string certFileName = Path.Combine("C:\\....", "cert.p12");

            request.ProtocolVersion = HttpVersion.Version10;

            X509Certificate2 cert = new X509Certificate2(certFileName, "pass");

            request.KeepAlive = false;
            request.ServicePoint.Expect100Continue = false;


            request.Method = Method.ToString();
            request.ContentLength = 0;
            request.ContentType = ContentType;

            request.ClientCertificates.Add(cert);
            request.PreAuthenticate = true;

            if (!string.IsNullOrEmpty(PostData) && Method == HttpVerb.POST)

            {
                var encoding = new UTF8Encoding();
                var bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(PostData);
                request.ContentLength = bytes.Length;

                using (var writeStream = request.GetRequestStream())
                {
                    writeStream.Write(bytes, 0, bytes.Length);
                }
            }

            using (var response = (HttpWebResponse)request.GetResponse())
            {
                var responseValue = string.Empty;

                if (response.StatusCode != HttpStatusCode.OK)
                {
                    var message = String.Format("Request failed. Received HTTP {0}", response.StatusCode);
                    throw new ApplicationException(message);
                }

                // grab the response
                using (var responseStream = response.GetResponseStream())
                {
                    if (responseStream != null)
                        using (var reader = new StreamReader(responseStream))
                        {
                            responseValue = reader.ReadToEnd();
                        }
                }

                return responseValue;
            }
        }

    } // class

}

E a chamada:

string endPoint = @"https://......./json";
            var client = new RestClient(endPoint);
            var json = client.MakeRequest();

 

 

Obrigado pela atenção...


 

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