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HttpWebRequest and X509Certificates...anyone?
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This message was discovered on ASPFriends.com 'aspngsec' list.


Paul Tillotson
Has anyone had luck accessing a secured SSL site using HttpWebRequest and
the X509Certificate class. I keep getting the error "Could not establish
trust relationship with remote server.I have successfully exported a .pfx
file to a DES 509 certificate .cer file.
I then read in the certificate file with the code below and TRY to post data
to HTTPS server.
Here is my code.
Thanks much Paul

////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////

X509Certificate x509
=509Certificate.CreateFromCertFile(@"c:\\MyDES509File.cer");
StreamWriter myWriter = null;
System.Net.HttpWebRequest objRequest;
objRequest =
(HttpWebRequest)System.Net.HttpWebRequest.Create(https://somesecuredServer/t
est.aspx);
objRequest.ClientCertificates.Add(x509);
objRequest.Method = "POST";
objRequest.ContentLength = strPost.Length;
objRequest.ContentType = "application/x-www-form-urlencoded";
try
{
myWriter = new StreamWriter(objRequest.GetRequestStream());
myWriter.Write("Test data to SSL port...");
}
catch (Exception err)
{
string someerror=err.Message.ToString();
ResultsBox.Text = "Error="+ someerror;
return ;
}
myWriter.Flush();
myWriter.Close();
Reply to this message...
 
    
Remas Wojciechowski
Paul,

I recall having that issue every now and then, but I forgot exactly when and
why. Try this wide shot, maybe it will turn out a hit:

1. Have you installed the certificate an the machine that sends the request?
My experience with SSL comes from windows services and there I even had to
create a user for the service to run under and install the certificate for
that user.

Could proxy be an issue (I doubt). One thing to remember about HTTPS proxy -
due to a bug, the Proxy class must be instantiated like this:
WebProxy("proxy.domain.com", 443)
(no https:// in the server part

hth
Remas
http://www.aspalliance.com/remas

----- Original Message -----
From: "Paul Tillotson" <Click here to reveal e-mail address>
To: "aspngsec" <Click here to reveal e-mail address>
Sent: Tuesday, July 16, 2002 9:42 AM
Subject: [aspngsec] HttpWebRequest and X509Certificates...anyone?

[Original message clipped]
Reply to this message...
 
 
System.IO.StreamWriter
System.Net.HttpWebRequest
System.Net.WebProxy
System.Security.Cryptography.X509Certificates.X509Certificate




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