Initial commit

Proxies/Proxy.cs

@@ -0,0 +1,76 @@
+/*
+ * 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.Net;
+using System.Threading.Tasks;
+using SecuCore.Sockets;
+
+namespace SecuCore.Proxies
+{
+    public enum ProxyProtocol
+    {
+        HTTP,
+        SOCKS4,
+        SOCKS5
+    }
+    public class Proxy
+    {
+        private string proxyHost;
+        private int proxyPort;
+        private string proxyUsername;
+        private string proxyPassword;
+        public ProxyProtocol proxyProtocol;
+
+        private IPAddress proxyAddress;
+
+        public Proxy(string proxyString, ProxyProtocol protocol)
+        {
+            if (proxyString.Contains(':'))
+            {
+                string[] pspl = proxyString.Split(':');
+                if (string.IsNullOrEmpty(pspl[0])) throw new Exception("Proxy host parse error");
+                this.proxyHost = pspl[0];
+                if(!int.TryParse(pspl[1], out this.proxyPort)) throw new Exception("Proxy port parse error");
+                if (pspl.Length > 2) this.proxyUsername = pspl[2];
+                if(pspl.Length > 3) this.proxyPassword = pspl[3];
+                this.proxyProtocol = protocol;
+            }
+            else
+            {
+                throw new Exception("Proxy input parse error");
+            }
+        }
+
+        public Task<bool> ConnectAsync(TCPNetworkStream tcpns, string remoteHost, int remotePort)
+        {
+            if (this.proxyProtocol == ProxyProtocol.HTTP)
+            {
+                return HTTPProxyProtocol.ConnectAsync(tcpns, remoteHost, remotePort, proxyUsername, proxyPassword, proxyHost + ":" + proxyPort);
+            }else if(this.proxyProtocol == ProxyProtocol.SOCKS5)
+            {
+                return SOCKS5ProxyProtocol.ConnectAsync(tcpns, remoteHost, remotePort, proxyUsername, proxyPassword);
+            }else if(this.proxyProtocol == ProxyProtocol.SOCKS4)
+            {
+                return SOCKS4ProxyProtocol.ConnectAsync(tcpns, remoteHost, remotePort, proxyUsername, proxyPassword);
+            }
+            return Task<bool>.FromResult(false);
+        }
+        public IPEndPoint GetRemoteEndpoint()
+        {
+            if(proxyAddress == null)
+            {
+                proxyAddress = IPAddress.Parse(proxyHost);
+            }
+            return new IPEndPoint(proxyAddress, proxyPort);
+        }
+    }
+}