pyxis/pyxis.helloworld/Program.cs

using System;
using System.Net;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.IO;

namespace pyxis.helloworld
{
	class Program
	{
		static void Main(string[] args)
		{
			Program p = new Program();
			p.run();
		}

		public void run()
		{
			X509Certificate2 cert_default = this.readKeyAndCert("gemini.key", "gemini.crt");
			X509Certificate2 cert_alt = this.readKeyAndCert("alt.key", "alt.crt");

			gemini.Server.Server server = new gemini.Server.Server(
				new IPEndPoint(IPAddress.Loopback, 1965),
				cert_default
			);
			server.AddCertificate("test.l.nucleardog.org", cert_alt);

			server.OnProcessRequest += this.processRequest;

			server.Start();

			Console.WriteLine("[Press Any Key to Continue]");
			Console.ReadKey();

			server.Stop();
		}

		public gemini.Protocol.Response processRequest(gemini.Server.Server server, gemini.Protocol.Request request)
		{
			gemini.Protocol.Response resp = new gemini.Protocol.Response();
			resp.setStatus(20);
			resp.setMeta("text/gemini; charset=utf-8");
			resp.setBody(System.Text.Encoding.UTF8.GetBytes("Hello, world!"));
			return resp;
		}

		private X509Certificate2 readKeyAndCert(string keypath, string certpath)
		{
			// Read cert
			X509Certificate2 cert = new X509Certificate2(certpath);

			// Read key
			string[] lines = File.ReadAllLines(keypath);
			string privateKeyString = "";
			foreach (string line in lines)
			{
				privateKeyString += line;
			}
			byte[] privateKeyData = Convert.FromBase64String(privateKeyString);

			RSA rsa = RSA.Create();
			rsa.ImportPkcs8PrivateKey(privateKeyData, out _);

			cert = cert.CopyWithPrivateKey(rsa);
			cert = new X509Certificate2(cert.Export(X509ContentType.Pfx));

			return cert;
		}
	}
}