//// /**
////  * File: SSH.cs
////  * Author: haraldwolff
////  *
////  * This file and it's content is copyrighted by the Author and / or copyright holder.
////  * Any use wihtout proper permission is illegal and may lead to legal actions.
////  *
////  *
////  **/
//using System;
//using Renci.SshNet;
//using ln.types;
//using Renci.SshNet.Common;
//using System.Net.Sockets;
//using ln.types.net;
//using ln.logging;

//namespace ln.skyscanner.crawl.service
//{
//    public class SSH : CrawlService
//    {
//        public SSH()
//            : base("ssh")
//        {
//        }

//        public static bool CanConnect(CrawledHost crawledHost)
//        {
//            int sshPort = crawledHost.GetHint<int>("ssh.port", -1);
//            IPv4 sshIP = crawledHost.GetHint<IPv4>("ssh.ip", null);
//            string sshUser = crawledHost.GetHint<string>("ssh.login", null);
//            string sshPassword = crawledHost.GetHint<string>("ssh.password", null);

//            if ((sshPort == -1) || !CanConnect(crawledHost,sshIP,sshPort,sshUser,sshPassword))
//            {
//                if (!Scan(crawledHost))
//                {
//                    crawledHost.SetHint("ssh.port", -1);
//                    crawledHost.SetHint("ssh.ip", null);
//                    crawledHost.SetHint("ssh.login", null);
//                    crawledHost.SetHint("ssh.password", null);
//                    crawledHost.SetHint("ssh.version", null);
//                    return false;
//                }
//            }
//            return true;
//        }

//        private static bool Scan(CrawledHost crawledHost)
//        {
//            foreach (IPv4 ip in crawledHost.IPAddresses)
//            {
//                foreach (int port in new int[] { 13022, 22 })
//                {
//                    if (crawledHost.HasHint(String.Format("tcp.{0}",port)) && crawledHost.GetHint<bool>(String.Format("tcp.{0}", port)))
//                    try
//                    {
//                        foreach (Credential credential in SkyScanner.Instance.Crawler.Credentials)
//                        {
//                            Logging.Log(LogLevel.DEBUG, "SSH trying {0}:{1}...", credential.Username, credential.Password.Substring(0, 4));

//                            if (CanConnect(crawledHost, ip, port, credential.Username, credential.Password, true))
//                                return true;
//                        }
//                    } catch (SocketException)
//                    {
//                        continue;
//                    }
//                }
//            }
//            return false;
//        }

//        private static bool CanConnect(CrawledHost crawledHost, IPv4 host, int port, string username, string password,bool throwe = false)
//        {
//            using (SshClient client = new SshClient(host.ToString(), port, username, password))
//            {
//                client.ConnectionInfo.Timeout = TimeSpan.FromSeconds(5);
//                try
//                {
//                    String authBanner = null;
//                    client.ConnectionInfo.AuthenticationBanner += (object sender, AuthenticationBannerEventArgs e) => authBanner = e.BannerMessage;

//                    client.Connect();

//                    crawledHost.SetHint("ssh.port", client.ConnectionInfo.Port);
//                    crawledHost.SetHint("ssh.ip", host);
//                    crawledHost.SetHint("ssh.login", client.ConnectionInfo.Username);
//                    crawledHost.SetHint("ssh.password", password);
//                    crawledHost.SetHint("ssh.version", client.ConnectionInfo.ServerVersion);
//                    crawledHost.SetHint("ssh.authbanner", authBanner);

//                    client.Disconnect();
//                    return true;
//                }
//                catch (SshException sshe)
//                {
//                    Logging.Log(sshe);
//                }
//                catch (SocketException)
//                {
//                    return false;
//                }
//            }
//            return false;
//        }

//        public override bool Check(Crawl crawl)
//        {
//            return CanConnect(crawl.Host);

//        }

//        public override bool HostProvidesOption(Crawl crawl, params object[] parameters)
//        {
//            return crawl.Host.GetHint<IPv4>("ssh.ip", null) != null;
//        }
//    }
//}