The caller has to explicitly request that untrusted certifications are required and places the callback back into it's default state upon completion.Free Download Manager makes downloading files and videos easier and faster and helps avoid dreaded broken downloads. Only after I googled the ***n thing I found out that the default behavior after encountering an invalid SSL cert is to throw this very exception.Ī variation I've been using for a while it if helps anyone. So I kept searching, and tweaking and doing all kinds of weird things. I don’t know about you, but to me that exception looked like something that would be caused by a silly mistake in my code that was causing the POST to fail. Could not establish trust relationship with remote server. When I sent the request I got a lovely exception thrown at me: Why would I be posting to a web page with and invalid SSL certificate? Because I’m cheap and I didn’t feel like paying Verisign or one of the other **-*s for a cert to my test box so I self signed it. The problem with the code above is that it doesn’t work if your certificate is not valid. Reason (quote from his article (minus cursing)) Luke wrote a pretty good article about this. Private static bool ValidateRemoteCertificate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors policyErrors)īool result = ('YourServerName') callback used to validate the certificate in an SSL conversation ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(ValidateRemoteCertificate) = ((sender, cert, chain, errors) => ('YourServerName')) ((sender, certificate, chain, sslPolicyErrors) => true) hope you find it helpful //Trust all certificates The last two at least check that the host name in the certificate is the one you expect. The first two use lambda expressions, the third uses regular code. However, if you are dealing with internal servers and getting a 'correct' certificate is not practical, use the following to tell the web service to ignore the certificate problems and bravely soldier on. This is dangerous if you are calling a server outside of your direct control, since you can no longer be as sure that you are talking to the server you think you're connected to. For example, it may be self-signed or the host name between the certificate and the server may not match. The following snippets will fix the case where there is something wrong with the SSL certificate on the server you are calling.

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