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Error Getting Access Token on SharePoint 2010 development RRS feed

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    Hi to all,

    I implemented the sample proposed in the link :

    http://msdn.microsoft.com/en-us/library/hh454950.aspx

    This works flawless on a console application, when i tryed to implement on SharePoint 2010 (specifically in an IHttpHandler '.ashx'file) i getting the error bellow on webRequest.GetRequestStream()

    Error :

    The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
    at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
       at System.Net.HttpWebRequest.GetRequestStream()

    Can anyone help me ?

    Regards!

    SharePoint Solution Architect

    Friday, August 9, 2013 10:52 PM

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    This looks like a certificate issue. Could you check if you Sharepoint code is overwriting this setting here

    System.Net.ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCallback;

    and possibly refusing the certificate? If the callback returns false it will refuse the certificate:

    private static bool RemoteCertificateValidationCallback(Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors){  /*some validation code*/ return false; } <-- this would fail the call.

    • Marked as answer by Vikram Dendi Tuesday, August 13, 2013 9:32 PM
    Tuesday, August 13, 2013 9:27 PM

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    Nobody ?

    SharePoint Solution Architect

    Monday, August 12, 2013 5:00 PM
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    Sergio - I've passed this on to our API developers. Stay tuned.

    Vikram Dendi, Director of Product Management
    Microsoft Translator

    Tuesday, August 13, 2013 8:30 PM
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    This looks like a certificate issue. Could you check if you Sharepoint code is overwriting this setting here

    System.Net.ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCallback;

    and possibly refusing the certificate? If the callback returns false it will refuse the certificate:

    private static bool RemoteCertificateValidationCallback(Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors){  /*some validation code*/ return false; } <-- this would fail the call.

    • Marked as answer by Vikram Dendi Tuesday, August 13, 2013 9:32 PM
    Tuesday, August 13, 2013 9:27 PM
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    Eric,

    You are the Guy ! this works.

    Now i will explain what i do to solve my issue.

    Like i explained above, i using a HttpHandler (.ashx file) an on the ProcessRequest I defined this :

    public void ProcessRequest(HttpContext context)

            {

                if (context == null || context.Request == null)

                    return;

                System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate(object sender1, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)

                   {

                       bool validationResult = true;

                       return validationResult;

                   };    

    And works.

    Thanks a lot Eric and Vikram

    Regards !

    SharePoint Solution Architect

    • Proposed as answer by ML3OON Monday, September 9, 2013 5:12 AM
    • Unproposed as answer by ML3OON Monday, September 9, 2013 5:12 AM
    Wednesday, August 14, 2013 2:00 AM