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SSL Authentication issues

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#1 dbelcham


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Posted 13 August 2015 - 03:58 PM

When I'm running my Netduino 3 WiFi I get the following error trying to connect to an Azure Mobile Services endpoint to do a POST


The code being executed is as follows:

        public HttpWebResponse Insert(string table, string json)
            var request = (HttpWebRequest) WebRequest.Create("" + table);
            request.Method = "POST";
            request.Accept = "application / json";
            request.ContentType = "application / json; charset = UTF-8 ";
            request.ContentLength = json.ToCharArray().Length;
            request.Headers.Add("X-ZUMO-APPLICATION", "myApplicationKey");

            using (var streamWriter = new StreamWriter(request.GetRequestStream()))

            using (var response = (HttpWebResponse) request.GetResponse())
                return response;

The exception is being thrown on the line with "using (var streamWriter" at the start of it. The only thing available is the stack trace at the start of this post. There is no inner exception and the message is "Exception was thrown: System.Exception"


I did some research and found a few posts on this forum but none of them seem to have any confirmed fixes. The closest I got was to use MFDeploy and do "Target | Manage Device Keys | Update SSL Seed" which outputs the following

Updating SSL seed...
request configured
Update Complete!

Any guidance, ideas or general thoughts would be appreciated.

#2 Chris Walker

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Posted 14 August 2015 - 07:01 PM

Hi dbelcham,

What version of firmware are you running? Can you upgrade to the latest firmware really quickly (if you're no already on it), which should give you a more specific Exception? And also, importantly, a socket exception error code.

If you're already on the latest firmware (posted sticky at the top of the Netduino 3 forum and posted on the download page)...can you provide an exact code sample (<=10 lines of code is best, but a few more are fine) that we can test out locally?

Thank you, and welcome to the Netduino community.


#3 dbelcham


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Posted 14 August 2015 - 07:08 PM

The exception thrown is "SystemException" and there is no error code that I'm able to find. I'll take care of updating the firmware later today and post back those results.



#4 pdii



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Posted 14 August 2015 - 08:29 PM

I'll start a separate thread because I don't want to hijack this one, but I wanted to leave a quick note that I too am facing some interesting issues with SSL on my N3W that are very similar to this.

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