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- using System;
- using System.IO;
- using System.Security.Cryptography;
- using System.Threading;
- using SteamKit2;
- //
- // Sample 5: SteamGuard
- //
- // this sample goes into detail for how to handle steamguard protected accounts and how to login to them
- //
- // SteamGuard works by enforcing a two factor authentication scheme
- // upon first logon to an account with SG enabled, the steam server will email an authcode to the validated address of the account
- // this authcode token can be used as the second factor during logon, but the token has a limited time span in which it is valid
- //
- // after a client logs on using the authcode, the steam server will generate a blob of random data that the client stores called a "sentry file"
- // this sentry file is then used in all subsequent logons as the second factor
- // ownership of this file provides proof that the machine being used to logon is owned by the client in question
- //
- // the usual login flow is thus:
- // 1. connect to the server
- // 2. logon to account with only username and password
- // at this point, if the account is steamguard protected, the LoggedOnCallback will have a result of AccountLogonDenied
- // the server will disconnect the client and email the authcode
- //
- // the login flow must then be restarted:
- // 1. connect to server
- // 2. logon to account using username, password, and authcode
- // at this point, login wil succeed and a UpdateMachineAuthCallback callback will be posted with the sentry file data from the steam server
- // the client will save the file, and reply to the server informing that it has accepted the sentry file
- //
- // all subsequent logons will use this flow:
- // 1. connect to server
- // 2. logon to account using username, password, and sha-1 hash of the sentry file
- namespace Mariobot
- {
- class Program
- {
- static SteamClient steamClient;
- static CallbackManager manager;
- static SteamUser steamUser;
- static bool isRunning;
- static string user, pass;
- static string authCode, twoFactorAuth;
- static void Main(string[] args)
- {
- if (args.Length < 2)
- {
- Console.WriteLine("Sample5: No username and password specified!");
- return;
- }
- // save our logon details
- user = args[0];
- pass = args[1];
- // create our steamclient instance
- steamClient = new SteamClient();
- // create the callback manager which will route callbacks to function calls
- manager = new CallbackManager(steamClient);
- // get the steamuser handler, which is used for logging on after successfully connecting
- steamUser = steamClient.GetHandler<SteamUser>();
- // register a few callbacks we're interested in
- // these are registered upon creation to a callback manager, which will then route the callbacks
- // to the functions specified
- manager.Subscribe<SteamClient.ConnectedCallback>(OnConnected);
- manager.Subscribe<SteamClient.DisconnectedCallback>(OnDisconnected);
- manager.Subscribe<SteamUser.LoggedOnCallback>(OnLoggedOn);
- manager.Subscribe<SteamUser.LoggedOffCallback>(OnLoggedOff);
- // this callback is triggered when the steam servers wish for the client to store the sentry file
- manager.Subscribe<SteamUser.UpdateMachineAuthCallback>(OnMachineAuth);
- isRunning = true;
- Console.WriteLine("Connecting to Steam...");
- // initiate the connection
- steamClient.Connect();
- // create our callback handling loop
- while (isRunning)
- {
- // in order for the callbacks to get routed, they need to be handled by the manager
- manager.RunWaitCallbacks(TimeSpan.FromSeconds(1));
- }
- }
- static void OnConnected(SteamClient.ConnectedCallback callback)
- {
- if (callback.Result != EResult.OK)
- {
- Console.WriteLine("Unable to connect to Steam: {0}", callback.Result);
- isRunning = false;
- return;
- }
- Console.WriteLine("Connected to Steam! Logging in '{0}'...", user);
- byte[] sentryHash = null;
- if (File.Exists("sentry.bin"))
- {
- // if we have a saved sentry file, read and sha-1 hash it
- byte[] sentryFile = File.ReadAllBytes("sentry.bin");
- sentryHash = CryptoHelper.SHAHash(sentryFile);
- }
- steamUser.LogOn(new SteamUser.LogOnDetails
- {
- Username = user,
- Password = pass,
- // in this sample, we pass in an additional authcode
- // this value will be null (which is the default) for our first logon attempt
- AuthCode = authCode,
- // if the account is using 2-factor auth, we'll provide the two factor code instead
- // this will also be null on our first logon attempt
- TwoFactorCode = twoFactorAuth,
- // our subsequent logons use the hash of the sentry file as proof of ownership of the file
- // this will also be null for our first (no authcode) and second (authcode only) logon attempts
- SentryFileHash = sentryHash,
- });
- }
- static void OnDisconnected(SteamClient.DisconnectedCallback callback)
- {
- // after recieving an AccountLogonDenied, we'll be disconnected from steam
- // so after we read an authcode from the user, we need to reconnect to begin the logon flow again
- Console.WriteLine("Disconnected from Steam, reconnecting in 5...");
- Thread.Sleep(TimeSpan.FromSeconds(5));
- steamClient.Connect();
- }
- static void OnLoggedOn(SteamUser.LoggedOnCallback callback)
- {
- bool isSteamGuard = callback.Result == EResult.AccountLogonDenied;
- bool is2FA = callback.Result == EResult.AccountLoginDeniedNeedTwoFactor;
- if (isSteamGuard || is2FA)
- {
- Console.WriteLine("This account is SteamGuard protected!");
- if (is2FA)
- {
- Console.Write("Please enter your 2 factor auth code from your authenticator app: ");
- twoFactorAuth = Console.ReadLine();
- }
- else
- {
- Console.Write("Please enter the auth code sent to the email at {0}: ", callback.EmailDomain);
- authCode = Console.ReadLine();
- }
- return;
- }
- if (callback.Result != EResult.OK)
- {
- Console.WriteLine("Unable to logon to Steam: {0} / {1}", callback.Result, callback.ExtendedResult);
- isRunning = false;
- return;
- }
- Console.WriteLine("Successfully logged on!");
- // at this point, we'd be able to perform actions on Steam
- }
- static void OnLoggedOff(SteamUser.LoggedOffCallback callback)
- {
- Console.WriteLine("Logged off of Steam: {0}", callback.Result);
- }
- static void OnMachineAuth(SteamUser.UpdateMachineAuthCallback callback)
- {
- Console.WriteLine("Updating sentryfile...");
- // write out our sentry file
- // ideally we'd want to write to the filename specified in the callback
- // but then this sample would require more code to find the correct sentry file to read during logon
- // for the sake of simplicity, we'll just use "sentry.bin"
- int fileSize;
- byte[] sentryHash;
- using (var fs = File.Open("sentry.bin", FileMode.OpenOrCreate, FileAccess.ReadWrite))
- {
- fs.Seek(callback.Offset, SeekOrigin.Begin);
- fs.Write(callback.Data, 0, callback.BytesToWrite);
- fileSize = (int)fs.Length;
- fs.Seek(0, SeekOrigin.Begin);
- using (var sha = new SHA1CryptoServiceProvider())
- {
- sentryHash = sha.ComputeHash(fs);
- }
- }
- // inform the steam servers that we're accepting this sentry file
- steamUser.SendMachineAuthResponse(new SteamUser.MachineAuthDetails
- {
- JobID = callback.JobID,
- FileName = callback.FileName,
- BytesWritten = callback.BytesToWrite,
- FileSize = fileSize,
- Offset = callback.Offset,
- Result = EResult.OK,
- LastError = 0,
- OneTimePassword = callback.OneTimePassword,
- SentryFileHash = sentryHash,
- });
- Console.WriteLine("Done!");
- }
- }
- }
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