HTTPS Proxy server in C#
I´m working on HTTPS proxy server.It should be a console application. I would like to find a manual or example for it.I found lot of pieces or non working samples. I try example from MSND for SSLStream but unsuccessfully. Does anyone have some experiences or working example ?
Assuming you're after a normal HTTPS proxy server (not a MITM proxy server), you don't need any SSL/TLS code at all.
All it needs is to be able to interpret the HTTP CONNECT
method and relay the traffic as-is to and from the host and port used in the CONNECT
request (eg CONNECT host.example.org:443
).
Take a look at the mentalis proxy source code
http://www.mentalis.org/soft/projects/proxy/
code:
using System;
using System.Text;
using System.Net.Sockets;
using System.Net.Security;
namespace SslTcpClient
{
public class SslTcpClient
{
public static void Main(string[] args)
{
string host = "encrypted.google.com";
string proxy = "127.0.0.1";//host;
int proxyPort = 8888;//443;
byte[] buffer = new byte[2048];
int bytes;
// Connect socket
TcpClient client = new TcpClient(proxy, proxyPort);
NetworkStream stream = client.GetStream();
// Establish Tcp tunnel
byte[] tunnelRequest = Encoding.UTF8.GetBytes(String.Format("CONNECT {0}:443 HTTP/1.1rnHost: {0}rnrn", host));
stream.Write(tunnelRequest , 0, tunnelRequest.Length);
stream.Flush();
// Read response to CONNECT request
// There should be loop that reads multiple packets
bytes = stream.Read(buffer, 0, buffer.Length);
Console.Write(Encoding.UTF8.GetString(buffer, 0, bytes));
// Wrap in SSL stream
SslStream sslStream = new SslStream(stream);
sslStream.AuthenticateAsClient(host);
// Send request
byte[] request = Encoding.UTF8.GetBytes(String.Format("GET https://{0}/ HTTP/1.1rnHost: {0}rnrn", host));
sslStream.Write(request, 0, request.Length);
sslStream.Flush();
// Read response
do
{
bytes = sslStream.Read(buffer, 0, buffer.Length);
Console.Write(Encoding.UTF8.GetString(buffer, 0, bytes));
} while (bytes != 0);
client.Close();
Console.ReadKey();
}
}
}
;)
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