// Decompiled with JetBrains decompiler
// Type: FritzBox.API.FritzWebAccess.FritzWebAccess
// Assembly: FritzBox, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
// MVID: DC9FD63C-0A96-43D7-A76E-0506FEB07200
// Assembly location: \\192.168.178.26\Freigabe\FritzBox.dll

using System;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Xml.Linq;

#nullable disable
namespace FritzBox.API.FritzWebAccess
{
    public class FritzWebAccess
    {
        public Uri Address { get; set; } = new Uri("http://fritz.box/");

        public Uri SoapAddress => new Uri(this.Address.Scheme + "://" + this.Address.Host + ":49000/");

        public string SessionId { get; private set; }

        public bool IsAuthenticated
        {
            get => !string.IsNullOrEmpty(this.SessionId) && this.SessionId != "0000000000000000";
        }

        public FritzWebAccess()
        {
        }

        public FritzWebAccess(string username, string password) => this.LogIn(username, password);

        public void LogIn(string password) => this.LogIn(string.Empty, password);

        public void LogIn(string username, string password)
        {
            Uri uri = new Uri(this.Address, "login_sid.lua");
            XDocument doc = XDocument.Load(uri.AbsoluteUri);
            this.SessionId = this.GetValue(doc, "SID");
            if (this.IsAuthenticated)
                return;
            string challenge = this.GetValue(doc, "Challenge");
            this.SessionId = this.GetValue(XDocument.Load(string.Format("{0}?username={1}&response={2}", (object)uri.AbsoluteUri, (object)username, (object)this.GetAuthResponse(challenge, password))), "SID");
        }

        private string GetValue(XDocument doc, string elementName)
        {
            return (doc.FirstNode as XElement).Element((XName)elementName).Value;
        }

        private string GetAuthResponse(string challenge, string password)
        {
            return challenge + "-" + this.GetMD5Hash(challenge + "-" + password);
        }

        private string GetMD5Hash(string input)
        {
            byte[] hash = MD5.Create().ComputeHash(Encoding.Unicode.GetBytes(input));
            StringBuilder stringBuilder = new StringBuilder();
            for (int index = 0; index < hash.Length; ++index)
                stringBuilder.Append(hash[index].ToString("x2"));
            return stringBuilder.ToString();
        }

        public string GetWebContent(string relativeUrl, string parameter = "")
        {
            return this.GetContent(this.Address, relativeUrl, parameter);
        }

        public string GetSoapContent(string relativeUrl, string parameter = "")
        {
            return this.GetContent(this.SoapAddress, relativeUrl, parameter);
        }

        public string GetContent(Uri baseAddress, string relativeUrl, string parameter = "")
        {
            using (HttpWebResponse response = (WebRequest.Create(new Uri(baseAddress, relativeUrl + "?sid=" + this.SessionId + parameter)) as HttpWebRequest).GetResponse() as HttpWebResponse)
            {
                using (StreamReader streamReader = new StreamReader(((WebResponse)response).GetResponseStream()))
                    return ((TextReader)streamReader).ReadToEnd();
            }
        }
    }
}