Making HTTPS call in C# with the BouncyCastle library - c#-4.0

Question

Using C# 4.0, I need to make HTTPS call with the BouncyCastle library (Short story : Windows XP + TLS 1.2).
When using the following code, I get a "HTTP Error 400. The request verb is invalid."
Here is my code :
using (var client = new TcpClient("serverName", 443))
{
var sr = new SecureRandom();
var cl = new MyTlsClient();
var protocol = new TlsClientProtocol(client.GetStream(), sr);
protocol.Connect(new MyTlsClient());
using (var stream = protocol.Stream)
{
var hdr = new StringBuilder();
hdr.AppendLine("GET /Url/WebService.asmx?wsdl HTTP/1.1");
hdr.AppendLine("Host: serverName");
hdr.AppendLine("Content-Type: text/xml; charset=utf-8");
hdr.AppendLine("Connection: close");
hdr.AppendLine();
var dataToSend = Encoding.ASCII.GetBytes(hdr.ToString());
sr.NextBytes(dataToSend);
stream.Write(dataToSend, 0, dataToSend.Length);
int totalRead = 0;
string response = "";
byte[] buff = new byte[1000];
do
{
totalRead = stream.Read(buff, 0, buff.Length);
response += Encoding.ASCII.GetString(buff, 0, totalRead);
} while (totalRead == buff.Length);
}
}
class MyTlsClient : DefaultTlsClient
{
public override TlsAuthentication GetAuthentication()
{
return new MyTlsAuthentication();
}
}
class MyTlsAuthentication : TlsAuthentication
{
public TlsCredentials GetClientCredentials(CertificateRequest certificateRequest) { return null; }
public void NotifyServerCertificate(Certificate serverCertificate) { }
}
What I've already done :
Using WireShark to decrypt the ssl stream and inspect the request send => I've never succeeded to decrypt ssl stream
Using fiddler to decrypt the https stream => No detection by fiddler so I suspect something might be badly encrypted
Any ideas ?

Answer 1

Thanks to PeterDettman who gave me the solution :
I must not use the sr.NextBytes(instructions), so the code becomes :
using (var client = new TcpClient("serverName", 443))
{
var sr = new SecureRandom();
var cl = new MyTlsClient();
var protocol = new TlsClientProtocol(client.GetStream(), sr);
protocol.Connect(new MyTlsClient());
using (var stream = protocol.Stream)
{
var hdr = new StringBuilder();
hdr.AppendLine("GET /Url/WebService.asmx?wsdl HTTP/1.1");
hdr.AppendLine("Host: serverName");
hdr.AppendLine("Content-Type: text/xml; charset=utf-8");
hdr.AppendLine("Connection: close");
hdr.AppendLine();
var dataToSend = Encoding.ASCII.GetBytes(hdr.ToString());
stream.Write(dataToSend, 0, dataToSend.Length);
int totalRead = 0;
string response = "";
byte[] buff = new byte[1000];
do
{
totalRead = stream.Read(buff, 0, buff.Length);
response += Encoding.ASCII.GetString(buff, 0, totalRead);
} while (totalRead == buff.Length);
}
}