Ok - that is a client certificate for sure.
I've got code that issues an HTTPS post to a remote server using client
certificates, but nothing that retrieves a file from the remote server
using client certificates - only using server certificates.
With your original code posted earlier today, add this just after
creating your HttpWebRequest:
ServicePointManager.ServerCertificateValidationCallback =
this.ValidateServerCertificate;
And then add this code:
public bool ValidateServerCertificate(
object sender,
X509Certificate certificate,
X509Chain chain,
SslPolicyErrors sslPolicyErrors)
{
if (sslPolicyErrors == SslPolicyErrors.None)
return true;
// Do not allow this client to communicate with unauthenticated
servers.
return false;
}
See if that helps.
Dino
-----Original Message-----
From: Discussion of advanced .NET topics.
[mailto:[EMAIL PROTECTED] On Behalf Of Eddie Lascu
Sent: Wednesday, 11 July 2007 06:03
To: [email protected]
Subject: Re: [ADVANCED-DOTNET] Accessing files over HTTPS -> for Peter
Ritchie
Yes, it does and I have to select the certificate they gave me and I
installed on my client machine. If I select something else or do not
select anything at all will not connect to the remote server.
-----Original Message-----
From: Discussion of advanced .NET topics.
[mailto:[EMAIL PROTECTED] Behalf Of Dean Cleaver
Sent: Tuesday, July 10, 2007 1:39 PM
To: [email protected]
Subject: Re: [ADVANCED-DOTNET] Accessing files over HTTPS -> for Peter
Ritchie
Eddie,
If you try to retrieve the file in your browser, does it ask you to pick
a client certificate from a list? I know in the other situation I have
where I access a remote server with a client certificate, that's exactly
what happens via IE7.
Dino
-----Original Message-----
From: Discussion of advanced .NET topics.
[mailto:[EMAIL PROTECTED] On Behalf Of Eddie Lascu
Sent: Wednesday, 11 July 2007 04:55
To: [email protected]
Subject: Re: [ADVANCED-DOTNET] Accessing files over HTTPS -> for Peter
Ritchie
Hello Dean,
I just entered this fascinating world and I am completely inexperienced.
I really don't know what is the difference between a server certificate
and a client certificate. Given that I had to install the digital
certificate on my client machine (although the certificate was provided
by the company that hosts the server I am trying to access) my guess is
that it is a client certificate.
In my case I am trying to implement an automated process, w/o human
intervention. There should be no login step and I believe that is why I
was presented with the digital certificate I had to install.
Thanks,
Eddie
-----Original Message-----
From: Discussion of advanced .NET topics.
[mailto:[EMAIL PROTECTED] Behalf Of Dean Cleaver
Sent: Tuesday, July 10, 2007 12:36 PM
To: [email protected]
Subject: Re: [ADVANCED-DOTNET] Accessing files over HTTPS -> for Peter
Ritchie
Eddie,
Can you clarify - are you using a server certificate (standard https) or
are you using a client certificate? The code below appears as if you're
using a client certificate.
I retrieve files over HTTPS with just a server certificate like this:
public static bool Retrieve(string url, string userName, string
password, string fileName) {
WebClient client = new WebClient();
client.Credentials = new NetworkCredential(userName, password);
ServicePointManager.ServerCertificateValidationCallback =
ValidateServerCertificate;
try
{
client.DownloadFile(url, fileName);
return true;
}
catch
{
return false;
}
}
public static bool ValidateServerCertificate(
object sender,
X509Certificate certificate,
X509Chain chain,
System.Net.Security.SslPolicyErrors sslPolicyErrors) {
if (sslPolicyErrors == System.Net.Security.SslPolicyErrors.None)
return true;
Console.WriteLine("Certificate error: {0}", sslPolicyErrors);
// Do not allow this client to communicate with unauthenticated
servers.
return false;
}
In my case, I have to log into the remote server as well, hence the
username, password and the NetworkCredential - you can remove those if
the remote server is not protected.
Cheers,
Dino
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