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Trevor Hall 2026-03-03 23:53:04 -05:00
commit 5584446828
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Proxies/HTTPProxyProtocol.cs Normal file
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/*
* Secucore
*
* Copyright (C) 2023 Trevor Hall
* All rights reserved.
*
* This software may be modified and distributed under the terms
* of the MIT license.
*
*/
using System;
using System.Text;
using System.Threading.Tasks;
namespace SecuCore.Proxies
{
public class HTTPProxyProtocol : IProxyProtocol
{
private const string httpConnectHostPort = "CONNECT {0}:{1} HTTP/1.1\r\n\r\n";
private const string httpConnectHostPortAuth = "CONNECT {0}:{1} HTTP/1.1\r\nProxy-Authorization: Basic {2}\r\n\r\n";
private static string CreateHTTPConnectHeaders(string destHost, int destport, string proxyUsername, string proxyPassword)
{
if (!string.IsNullOrEmpty(proxyUsername) && !string.IsNullOrEmpty(proxyPassword))
{
//auth
string b64 = Convert.ToBase64String(Encoding.ASCII.GetBytes(proxyUsername + ":" + proxyPassword));
return string.Format(httpConnectHostPortAuth, destHost, destport, b64);
}
else
{
return string.Format(httpConnectHostPort, destHost, destport);
}
}
public static async Task<bool> ConnectAsync(Sockets.TCPNetworkStream tcpns, string remoteHost, int remotePort, string proxyUsername, string proxyPassword, string extra)
{
string http_connect_headers = CreateHTTPConnectHeaders(remoteHost, remotePort, proxyUsername, proxyPassword);
byte[] header_data = Encoding.ASCII.GetBytes(http_connect_headers);
await tcpns.WriteAsync(header_data, 0, header_data.Length).ConfigureAwait(false);
byte[] received = await tcpns.ReadUntilCRLFCRLF().ConfigureAwait(false);
if (received == null) return false;
int rlen = received.Length;
if (rlen <= 9) return false;
string result = Encoding.ASCII.GetString(received, 0, rlen);
string code = result.Substring(9, 3);
if (code != "200") return false;
return true;
}
}
}