WebRequest.GetResponse() throwing SSL secure channel error

Problem Statement:

WebRequest.GetResponse() is one of the most common ways we adopt to perform a HTTPWebRequest from our server side. This case was a specific one, although the error appeared to be more generic in nature. In fact it happened only in SharePoint and not in my .Net application.

The error observed in the GetResponse() method was:

“The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel”

One of the root cause of this problem is due to the certificate issue. And to be more precise the certificate validation has failed.

Solution:

The solution to this problem, more or less i would call it a decent workaround is to use the ServerCertificateCallbackValidation method from the HttpWebRequest class and forcefully return true.

Create a static method for validating the certificate

private static bool ValidateFbCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors policyErrors)
{
return true;
}

Just before u make your HttpWebRequest try using this.

ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(ValidateFbCertificate);

HttpWebRequest …..;

This should skip any certificate errors.

Happy Coding!!!

Published by aackose

A Sitecore & SharePoint Consultant with over 11 years of extensive technical experience in UI/UX Designing, Requirements Analysis, Designing, Developing, Testing, Deployment, Infrastructure Setup for web/enterprise-based applications using Microsoft Technologies (SharePoint, Sitecore & .NET) across all phases of SDLC View all posts by aackose

NTvelu@123 October 23, 2015 at 5:13 PM

Great. Thank you for sharing

Reply
prakash October 14, 2015 at 12:44 PM
Not working . see my code

ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(ValidateFbCertificate);
WebRequest webRequest = WebRequest.Create(@”https://secure.profitorius.com/cgi-bin/api.pl?username=xxxx&password=xxxxx &type=sale&totamt=100.00&currency=USD&ccn=4111111111111111&ccexp=1218&cvv=123&orderid=100001&orderdesc=description&pon=1&shipping=10.00&tax=15.00&bfn=Fred&bln=Smith&bcountry=CA&bstate=ON&baddress1=address1&baddress2=address2&bcity=Toronto&bzip=M5S2T2&bphone=4161234567&bfax=4161234568&bemail=fred@hotmail.com&sasaba=1″);
webRequest.ContentType = “text/html”;
webRequest.Method = “POST”;
string body = “…”;
byte[] bytes = Encoding.ASCII.GetBytes(body);
webRequest.ContentLength = bytes.Length;
```
              ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(ValidateFbCertificate);

              var os = webRequest.GetRequestStream();
              os.Write(bytes, 0, bytes.Length);
              os.Close();
              webRequest.Timeout = 0; //setting the timeout to 0 causes the request to fail
              WebResponse webResponse = webRequest.GetResponse(); //Exception thrown here ..
```
Reply
rob April 30, 2014 at 1:58 AM

not work

Reply
1. aackose April 30, 2014 at 2:27 AM
  
  Hi Rob,
  
  Can you tell me the scenario that you are in & the issue that you are facing?
  
  Reply
TriSys (@TriSys) January 28, 2013 at 3:25 PM

Thanks for posting this code. Works a treat in my WinForms .Net app connecting to HTTPS web sites.

Reply