HttpWebRequest and client certificates

[steveS]

Hi all,
I'm having trouble connecting to a Java web service using HttpWebRequest. I
get the error message "The request was aborted: Could not create SSL/TLS
secure channel". The Java service requires a client certificate which they
have provided in .cer format. I can connect ok to their test service which
uses SSL but doesnt require a client certificate with the code below.

I dont have great deal of knowledge about client certificates so anyone got
any ideas why this isnt working?

Thanks
Steve

Details are:
Tried using .net 1.1 and .net 2.0.
Running this code from a Winform application.

I'm connecting using the code below

System.Net.ServicePointManager.CertificatePolicy = new
TrustAllCertificatePolicy();
string url="https://www.websiteurlhere.com";
XmlDocument doc = new XmlDocument();
doc.Load(xml file containing request);

string data=doc.InnerXml;
byte[] buffer=Encoding.UTF8.GetBytes(data);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ProtocolVersion = HttpVersion.Version10;
req.KeepAlive = false;
req.Headers.Clear();

X509Certificate cert =
X509Certificate.CreateFromCertFile(@"C:\Develop\ce rt_sign.cer");
req.ClientCertificates.Add(cert);
req.ContentLength = buffer.Length;
req.ContentType ="application/x-www-form-urlencoded";

using (Stream reqst = req.GetRequestStream())
{
reqst.Write(buffer, 0, buffer.Length);
reqst.Flush();
}
using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())
{
using (Stream rs = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(rs))
{
string responseDetails = sr.ReadToEnd();
textBox1.Text = responseDetails;
}
}
}

[=?Utf-8?B?UGV0ZXIgUml0Y2hpZSBbQyMgTVZQXQ==?=]

http://support.microsoft.com/kb/895971 sounds like it describes what you want
to do.

--
Browse http://connect.microsoft.com/VisualStudio/feedback/ and vote.
http://www.peterRitchie.com/blog/
Microsoft MVP, Visual Developer - Visual C#
"steveS" wrote:

Hi all,
I'm having trouble connecting to a Java web service using HttpWebRequest. I
get the error message "The request was aborted: Could not create SSL/TLS
secure channel". The Java service requires a client certificate which they
have provided in .cer format. I can connect ok to their test service which
uses SSL but doesnt require a client certificate with the code below.

I dont have great deal of knowledge about client certificates so anyone got
any ideas why this isnt working?

Thanks
Steve

Details are:
Tried using .net 1.1 and .net 2.0.
Running this code from a Winform application.

I'm connecting using the code below

System.Net.ServicePointManager.CertificatePolicy = new
TrustAllCertificatePolicy();
string url="https://www.websiteurlhere.com";
XmlDocument doc = new XmlDocument();
doc.Load(xml file containing request);

string data=doc.InnerXml;
byte[] buffer=Encoding.UTF8.GetBytes(data);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ProtocolVersion = HttpVersion.Version10;
req.KeepAlive = false;
req.Headers.Clear();

X509Certificate cert =
X509Certificate.CreateFromCertFile(@"C:\Develop\ce rt_sign.cer");
req.ClientCertificates.Add(cert);
req.ContentLength = buffer.Length;
req.ContentType ="application/x-www-form-urlencoded";

using (Stream reqst = req.GetRequestStream())
{
reqst.Write(buffer, 0, buffer.Length);
reqst.Flush();
}
using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())
{
using (Stream rs = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(rs))
{
string responseDetails = sr.ReadToEnd();
textBox1.Text = responseDetails;
}
}
}

[steveS]

Hi Peter,
Thanks for the reply and the link but I've already read that article.
I'm struggling to find information on using client certificates for example
when I double click on the client certificate the general tab displays a
message "Windows does not have enough information to verify this
certificate", but I can continue to install the certificate ok. Does this
message mean that the certificate is invalid in someway?

Steve
"Peter Ritchie [C# MVP]" <PR****@newsgroups.nospamwrote in message
news:33**********************************@microsof t.com...

http://support.microsoft.com/kb/895971 sounds like it describes what you
want
to do.

--
Browse http://connect.microsoft.com/VisualStudio/feedback/ and vote.
http://www.peterRitchie.com/blog/
Microsoft MVP, Visual Developer - Visual C#
"steveS" wrote:

>Hi all,
I'm having trouble connecting to a Java web service using HttpWebRequest.
I
get the error message "The request was aborted: Could not create SSL/TLS
secure channel". The Java service requires a client certificate which
they
have provided in .cer format. I can connect ok to their test service
which
uses SSL but doesnt require a client certificate with the code below.

I dont have great deal of knowledge about client certificates so anyone
got
any ideas why this isnt working?

Thanks
Steve

Details are:
Tried using .net 1.1 and .net 2.0.
Running this code from a Winform application.

I'm connecting using the code below

System.Net.ServicePointManager.CertificatePolicy = new
TrustAllCertificatePolicy();
string url="https://www.websiteurlhere.com";
XmlDocument doc = new XmlDocument();
doc.Load(xml file containing request);

string data=doc.InnerXml;
byte[] buffer=Encoding.UTF8.GetBytes(data);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ProtocolVersion = HttpVersion.Version10;
req.KeepAlive = false;
req.Headers.Clear();

X509Certificate cert =
X509Certificate.CreateFromCertFile(@"C:\Develop\c ert_sign.cer");
req.ClientCertificates.Add(cert);
req.ContentLength = buffer.Length;
req.ContentType ="application/x-www-form-urlencoded";

using (Stream reqst = req.GetRequestStream())
{
reqst.Write(buffer, 0, buffer.Length);
reqst.Flush();
}
using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())
{
using (Stream rs = response.GetResponseStream())
{
using (StreamReader sr = new StreamReader(rs))
{
string responseDetails = sr.ReadToEnd();
textBox1.Text = responseDetails;
}
}
}