473 lines
20 KiB
C#
473 lines
20 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.IO;
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using System.Net;
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using System.Threading;
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using System.Net.Http;
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using System.Net.Http.Headers;
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using System.Data;
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using System.Web.Helpers;
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using System.Web.Razor.Text;
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using System.ComponentModel;
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namespace Cloudfare_DNS_Updater
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{
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public class Program
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{
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static bool silent = false;
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public static readonly string[] IPHelperURLS = new string[]
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{
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"http://ifconfig.me/ip",
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"http://ifconfig.co/ip",
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"http://ident.me/"
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};
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public enum StatusCode
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{
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Normal,
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IpUpdated,
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IpGetFailiure,
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FileWriteFailiure,
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GetRecordFailiure,
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SetRecordFailiure
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}
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static Task[] currentTasks;
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static void Main(string[] args)
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{
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StatusCode status = StatusCode.Normal;
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if (args.Contains("\\s"))
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{
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silent = true;
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}
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// Load the data to be used
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object[] loadState = LoadData(Environment.CurrentDirectory + "\\Credentials.dat");
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status = (StatusCode)loadState[0];
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if(status == StatusCode.Normal)
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{
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List<Authority> authorities = (List<Authority>)loadState[1];
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foreach (Authority authority in authorities)
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{
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status = Task.Run(() => GetRequest(authority)).Result;
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Console.WriteLine(status.ToString());
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}
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}
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if(currentTasks != null && currentTasks.Length > 0)
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{
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Task.WaitAll(currentTasks);
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}
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Environment.Exit((int)status);
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}
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static async Task<StatusCode> GetRequest(Authority authority)
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{
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StatusCode status = StatusCode.Normal;
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string currentIp = "";
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string localIp = "";
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string type = "";
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int ttl = 0;
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bool proxiedstate = false;
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using (HttpClient ipGrabber = new HttpClient())
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{
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bool validIp = false;
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int domainInc = 0;
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while (!validIp && domainInc < IPHelperURLS.Length)
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{
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HttpResponseMessage httpResponse = await ipGrabber.GetAsync(IPHelperURLS[domainInc]);
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if (httpResponse.IsSuccessStatusCode)
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{
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string provided_ip = await httpResponse.Content.ReadAsStringAsync();
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provided_ip = provided_ip.Trim();
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IPAddress address = null;
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if (IPAddress.TryParse(provided_ip, out address))
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{
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localIp = provided_ip;
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validIp = true;
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Console.WriteLine("Our IP: " + provided_ip);
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}
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}
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domainInc++;
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}
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}
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if (localIp != "")
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{
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HttpClient httpClient = new HttpClient();
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httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", " Bearer " + authority.KeyTag.EvaluateAll());
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httpClient.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json");
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HttpCompletionOption httpCompletionOption = HttpCompletionOption.ResponseContentRead;
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// Get the current settings
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HttpResponseMessage response = await httpClient.GetAsync(Authority.cloudfare_api_url + "zones/" + authority.ZoneTag.EvaluateAll() + "/dns_records/" + authority.DnsTag.EvaluateAll(), httpCompletionOption, CancellationToken.None);
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if (response.IsSuccessStatusCode)
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{
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using (HttpContent content = response.Content)
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{
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Console.WriteLine("Retrieving IP data from the server");
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string s = await content.ReadAsStringAsync();
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dynamic recieved_content = Json.Decode(s);
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currentIp = recieved_content.result.content;
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type = recieved_content.result.type;
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ttl = recieved_content.result.ttl;
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proxiedstate = recieved_content.result.proxied;
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}
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// Now check if the IP matches...
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if (currentIp != localIp)
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{
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Console.WriteLine("IP {0} doesn't match our current IP {1}. Updating...", currentIp, localIp);
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Dictionary<string, object> UpdateContent = new Dictionary<string, object>();
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UpdateContent.Add("type", type);
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UpdateContent.Add("name", authority.DomainTag.EvaluateAll());
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UpdateContent.Add("content", localIp); // IP Field. Update this as necessary
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UpdateContent.Add("ttl", ttl);
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UpdateContent.Add("proxied", proxiedstate);
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string updateContent = Json.Encode(UpdateContent);
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byte[] putBytes = Encoding.UTF8.GetBytes(updateContent);
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HttpContent putContent = new ByteArrayContent(putBytes);
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HttpResponseMessage putResponse = await httpClient.PutAsync(Authority.cloudfare_api_url + "zones/" + authority.ZoneTag.EvaluateAll() + "/dns_records/" + authority.DnsTag.EvaluateAll(), putContent);
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if (!putResponse.IsSuccessStatusCode)
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{
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status = StatusCode.SetRecordFailiure;
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}
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else
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{
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status = StatusCode.IpUpdated;
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}
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Console.WriteLine("Got {0} updating IP to {1}", putResponse.StatusCode, localIp);
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}
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else
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{
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Console.WriteLine("DNS IP {0} matches our IP", currentIp);
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}
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}
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else
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{
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status = StatusCode.GetRecordFailiure;
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}
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}
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else
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{
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status = StatusCode.IpGetFailiure;
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}
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return status;
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}
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public static object[] LoadData(string filePath)
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{
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StatusCode status = StatusCode.Normal;
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// Decode or encode
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try
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{
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Console.WriteLine("Reading data...");
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List<Authority> authorities = new List<Authority>(5);
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using (FileStream fileStream = File.OpenRead(filePath))
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{
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const string EndTag = "-###";
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List<long[]> authoritySections = new List<long[]>(5);
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long[] section = new long[] { 0, fileStream.Length };
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string tag = "";
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while(fileStream.Position < fileStream.Length)
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{
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char c = (char)fileStream.ReadByte();
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if (tag == EndTag)
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{
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section[1] = fileStream.Position - EndTag.Length;
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authoritySections.Add(section);
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section = new long[] { fileStream.Position, fileStream.Length };
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tag = "";
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}
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else if (c == EndTag[tag.Length])
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{
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tag += c;
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}
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else
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{
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tag = "";
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}
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}
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authoritySections.Add(section);
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foreach (long[] foundSection in authoritySections)
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{
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Authority authority = new Authority();
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authority.ReadValues(fileStream, foundSection[0], foundSection[1]);
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authorities.Add(authority);
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}
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}
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return new object[] { status, authorities };
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}
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catch (FileNotFoundException e)
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{
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if (silent)
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{
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// If the app is running in silent, we have no vector to supply new data, so throw the exception
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throw e;
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}
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else
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{
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Console.WriteLine("File not found.");
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Console.WriteLine("Please enter the Domain: ");
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string domain = Console.ReadLine();
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Console.WriteLine("Please enter the Authorisation Email Address: ");
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string email = Console.ReadLine();
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Console.WriteLine("Please enter the Authorisation Key: ");
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string key = Console.ReadLine();
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Console.WriteLine("Please enter the Zone ID: ");
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string zone = Console.ReadLine();
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Console.WriteLine("Please enter the Dns ID: ");
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string dns = Console.ReadLine();
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// Schedule an update to the credentials file (runs asynchronously as it may encounter io errors)
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if (currentTasks == null)
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{
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currentTasks = new Task[] { Task.Run(() => WriteFile(Environment.CurrentDirectory + "\\Credentials.dat", new string[] { Authority.auth_domain_tag + " = " + domain, Authority.auth_email_tag + " = " + email, Authority.auth_key_tag + " = " + key, Authority.auth_zone_tag + " = " + zone, Authority.auth_dns_tag + " = " + dns })) };
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}
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else
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{
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currentTasks.Append(Task.Run(() => WriteFile(Environment.CurrentDirectory + "\\Credentials.dat", new string[] { Authority.auth_domain_tag + " = " + domain, Authority.auth_email_tag + " = " + email, Authority.auth_key_tag + " = " + key, Authority.auth_zone_tag + " = " + zone, Authority.auth_dns_tag + " = " + dns })));
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}
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Authority authority = new Authority();
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authority.DnsTag = authority.ReadBytes(new MemoryStream(Encoding.UTF8.GetBytes(dns)), 0, Encoding.UTF8.GetBytes(dns).Length);
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authority.DomainTag = authority.ReadBytes(new MemoryStream(Encoding.UTF8.GetBytes(domain)), 0, Encoding.UTF8.GetBytes(domain).Length);
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authority.EmailTag = authority.ReadBytes(new MemoryStream(Encoding.UTF8.GetBytes(email)), 0, Encoding.UTF8.GetBytes(email).Length);
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authority.KeyTag = authority.ReadBytes(new MemoryStream(Encoding.UTF8.GetBytes(key)), 0, Encoding.UTF8.GetBytes(key).Length);
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authority.ZoneTag = authority.ReadBytes(new MemoryStream(Encoding.UTF8.GetBytes(zone)), 0, Encoding.UTF8.GetBytes(zone).Length);
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List<Authority> authorities = new List<Authority>(1);
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return new object[] { status , authorities };
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}
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}
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catch (Exception e)
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{
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Console.WriteLine(e);
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status = StatusCode.FileWriteFailiure;
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return new object[] { status };
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}
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}
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public static void WriteFile(string path, string[] data)
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{
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bool success = false;
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int attemptLimit = 5;
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int attemptsCount = 0;
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while (!success && attemptsCount < attemptLimit)
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{
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try
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{
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FileStream fileStream = File.OpenWrite(path);
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foreach (var line in data)
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{
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fileStream.Write(Encoding.UTF8.GetBytes(line + Environment.NewLine), 0, Encoding.UTF8.GetBytes(line + Environment.NewLine).Length);
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}
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success = true;
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fileStream.Dispose();
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}
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catch
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{
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attemptsCount++;
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Thread.Sleep(500);
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}
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}
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}
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}
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public class Authority : IDisposable
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{
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public const string auth_domain_tag = "X-AUTH-DOMAIN";
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public const string auth_email_tag = "X-AUTH-EMAIL";
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public const string auth_key_tag = "X-AUTH-KEY";
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public const string auth_zone_tag = "X-AUTH-ZONE";
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public const string auth_dns_tag = "X-AUTH-DNS";
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public const string cloudfare_api_url = "https://api.cloudflare.com/client/v4/";
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public ObfusctedBytes DomainTag { get; set; }
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public ObfusctedBytes EmailTag { get; set; }
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public ObfusctedBytes KeyTag { get; set; }
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public ObfusctedBytes ZoneTag { get; set; }
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public ObfusctedBytes DnsTag { get; set; }
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public void Dispose()
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{
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if (DomainTag != null) DomainTag.Dispose();
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if (EmailTag != null) EmailTag.Dispose();
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if (KeyTag != null) KeyTag.Dispose();
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if (ZoneTag != null) ZoneTag.Dispose();
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if (DnsTag != null) DnsTag.Dispose();
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}
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public void ReadValues(Stream source, long start=-1, long end=-1)
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{
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if (start == -1) start = source.Position;
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else source.Position = start;
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if (end == -1) end = source.Length;
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// Start by finding the constraints of our pairs
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Dictionary<string, long[]> keyValuePairs = new Dictionary<string, long[]>(5);
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long[] constraints = new long[] {start, end};
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long returnPos = -1;
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bool findData = false;
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string key = "";
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while (source.Position < end)
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{
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int r = source.ReadByte();
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if(findData)
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{
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while (r == ' ')
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{
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r = source.ReadByte();
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}
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findData = false;
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long currentPos = source.Position;
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source.Position = start;
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for (int i = 0; i < currentPos; i++)
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{
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Console.Write((char)source.ReadByte());
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}
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constraints[0] = source.Position;
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}
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else if(r == '=')
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{
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findData = true;
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}
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else if(r == '\r')
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{
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returnPos = source.Position;
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}
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else if(r == '\n')
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{
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constraints[1] = (returnPos > -1) ? returnPos : source.Position;
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returnPos = -1;
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keyValuePairs.Add(key, constraints);
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constraints = new long[] {source.Position, end };
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key = "";
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}
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// If this value would match
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else if(auth_domain_tag.Contains(key + (char)r) ||
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auth_dns_tag.Contains(key + (char)r) ||
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auth_email_tag.Contains(key + (char)r) ||
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auth_key_tag.Contains(key + (char)r) ||
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auth_zone_tag.Contains(key + (char)r))
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{
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key += (char)r;
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}
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}
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keyValuePairs.Add(key, constraints);
|
|||
|
|
// Use the keys to create our objects
|
|||
|
|
foreach (var item in keyValuePairs)
|
|||
|
|
{
|
|||
|
|
switch (item.Key)
|
|||
|
|
{
|
|||
|
|
case auth_domain_tag:
|
|||
|
|
DomainTag = ReadBytes(source, item.Value[0], item.Value[1]);
|
|||
|
|
break;
|
|||
|
|
case auth_dns_tag:
|
|||
|
|
DnsTag = ReadBytes(source, item.Value[0], item.Value[1]);
|
|||
|
|
break;
|
|||
|
|
case auth_email_tag:
|
|||
|
|
EmailTag = ReadBytes(source, item.Value[0], item.Value[1]);
|
|||
|
|
break;
|
|||
|
|
case auth_key_tag:
|
|||
|
|
KeyTag = ReadBytes(source, item.Value[0], item.Value[1]);
|
|||
|
|
break;
|
|||
|
|
case auth_zone_tag:
|
|||
|
|
ZoneTag = ReadBytes(source, item.Value[0], item.Value[1]);
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
public ObfusctedBytes ReadBytes(Stream source, long start, long end)
|
|||
|
|
{
|
|||
|
|
source.Position = start-1;
|
|||
|
|
ObfusctedBytes bytes = new ObfusctedBytes(source.ReadByte());
|
|||
|
|
while (source.Position < end-1)
|
|||
|
|
{
|
|||
|
|
bytes.LinkNext(source.ReadByte());
|
|||
|
|
}
|
|||
|
|
return bytes;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// An obfuscated byte helps mask the data in memory.<br />
|
|||
|
|
/// Based on a linked-list, data should not be expected to be contiguous.<br />
|
|||
|
|
/// Also includes simple bitwise motion to prevent passerby reading.
|
|||
|
|
/// </summary>
|
|||
|
|
public class ObfusctedBytes : IDisposable
|
|||
|
|
{
|
|||
|
|
ObfusctedBytes nextByte = null;
|
|||
|
|
int position;
|
|||
|
|
private readonly int mask = 0b_1110_0011;
|
|||
|
|
byte[] values;
|
|||
|
|
|
|||
|
|
public ObfusctedBytes(int value, int position=0)
|
|||
|
|
{
|
|||
|
|
Random prngle = new Random();
|
|||
|
|
this.position = position;
|
|||
|
|
int byte1 = prngle.Next(0, 255); // start with a base number
|
|||
|
|
byte1 &= mask; // Zero our target bits
|
|||
|
|
byte1 |= ((value >> 5) << 2); // bitshift the value and mask it into the byte
|
|||
|
|
|
|||
|
|
int byte2 = prngle.Next(0, 255);
|
|||
|
|
byte2 &= mask;
|
|||
|
|
byte2 |= value & ~mask;
|
|||
|
|
|
|||
|
|
int byte3 = prngle.Next(0, 255);
|
|||
|
|
byte3 &= mask;
|
|||
|
|
byte3 |= (value & 0b_0000_0011) << 2;
|
|||
|
|
|
|||
|
|
values = new byte[] { (byte)byte1,(byte)byte2,(byte)byte3};
|
|||
|
|
}
|
|||
|
|
/// <summary>
|
|||
|
|
/// Evaluates the current byte, from the provided data
|
|||
|
|
/// </summary>
|
|||
|
|
/// <returns>an int representing the original data</returns>
|
|||
|
|
private int Evaluate()
|
|||
|
|
{
|
|||
|
|
int mask = 0b_1110_0011;
|
|||
|
|
return (((values[0] & ~mask) << 3) | (values[1] & ~mask) | ((values[2] >> 2) & 0b_0000_0011));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public string EvaluateAll()
|
|||
|
|
{
|
|||
|
|
string result = string.Empty + (char)Evaluate();
|
|||
|
|
ObfusctedBytes obfusctedBytes = this;
|
|||
|
|
while(obfusctedBytes.nextByte != null)
|
|||
|
|
{
|
|||
|
|
int t = obfusctedBytes.nextByte.Evaluate();
|
|||
|
|
result += (char)t;
|
|||
|
|
obfusctedBytes = obfusctedBytes.nextByte;
|
|||
|
|
}
|
|||
|
|
return result;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public void LinkNext(int value)
|
|||
|
|
{
|
|||
|
|
int nextPosition = position;
|
|||
|
|
ObfusctedBytes nextElement = this;
|
|||
|
|
while (nextElement.nextByte != null)
|
|||
|
|
{
|
|||
|
|
nextElement = nextElement.nextByte;
|
|||
|
|
nextPosition++;
|
|||
|
|
}
|
|||
|
|
ObfusctedBytes nextByte = new ObfusctedBytes(value, ++nextPosition);
|
|||
|
|
nextElement.nextByte = nextByte;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public void Dispose()
|
|||
|
|
{
|
|||
|
|
if (nextByte != null)
|
|||
|
|
{
|
|||
|
|
nextByte.Dispose();
|
|||
|
|
}
|
|||
|
|
for (int i = 0; i < values.Length; i++)
|
|||
|
|
{
|
|||
|
|
values[i] = 0;
|
|||
|
|
}
|
|||
|
|
values = null;
|
|||
|
|
nextByte = null;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|