mirror of
https://github.com/JustArchiNET/ArchiSteamFarm.git
synced 2026-01-01 14:10:53 +00:00
344 lines
10 KiB
C#
344 lines
10 KiB
C#
/*
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_ _ _ ____ _ _____
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/ \ _ __ ___ | |__ (_)/ ___| | |_ ___ __ _ _ __ ___ | ___|__ _ _ __ _ __ ___
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/ _ \ | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_ / _` || '__|| '_ ` _ \
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/ ___ \ | | | (__ | | | || | ___) || |_| __/| (_| || | | | | || _|| (_| || | | | | | | |
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/_/ \_\|_| \___||_| |_||_||____/ \__|\___| \__,_||_| |_| |_||_| \__,_||_| |_| |_| |_|
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Copyright 2015-2016 Łukasz "JustArchi" Domeradzki
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Contact: JustArchi@JustArchi.net
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using ArchiSteamFarm.JSON;
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using HtmlAgilityPack;
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using Newtonsoft.Json;
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namespace ArchiSteamFarm {
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[SuppressMessage("ReSharper", "ClassCannotBeInstantiated")]
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[SuppressMessage("ReSharper", "ClassNeverInstantiated.Global")]
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internal sealed class MobileAuthenticator {
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internal sealed class Confirmation {
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internal readonly uint ID;
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internal readonly ulong Key;
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internal readonly Steam.ConfirmationDetails.EType Type;
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internal Confirmation(uint id, ulong key, Steam.ConfirmationDetails.EType type) {
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if ((id == 0) || (key == 0) || (type == Steam.ConfirmationDetails.EType.Unknown)) {
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throw new ArgumentNullException(nameof(id) + " || " + nameof(key) + " || " + nameof(type));
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}
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ID = id;
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Key = key;
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Type = type;
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}
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}
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private const byte CodeDigits = 5;
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private const byte CodeInterval = 30;
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private const byte MaxConfirmationsPerRequest = 30; // This is limit enforced by Valve
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private static readonly char[] CodeCharacters = {
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'2', '3', '4', '5', '6', '7', '8', '9', 'B', 'C',
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'D', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'Q',
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'R', 'T', 'V', 'W', 'X', 'Y'
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};
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private static readonly SemaphoreSlim TimeSemaphore = new SemaphoreSlim(1);
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private static short SteamTimeDifference;
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internal bool HasDeviceID => !string.IsNullOrEmpty(DeviceID);
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#pragma warning disable 649
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[JsonProperty(PropertyName = "shared_secret", Required = Required.Always)]
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private readonly string SharedSecret;
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[JsonProperty(PropertyName = "identity_secret", Required = Required.Always)]
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private readonly string IdentitySecret;
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#pragma warning restore 649
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[JsonProperty(PropertyName = "device_id")]
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private string DeviceID;
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private Bot Bot;
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private MobileAuthenticator() {
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}
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internal void Init(Bot bot) {
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if (bot == null) {
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throw new ArgumentNullException(nameof(bot));
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}
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Bot = bot;
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}
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internal void CorrectDeviceID(string deviceID) {
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if (string.IsNullOrEmpty(deviceID)) {
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Logging.LogNullError(nameof(deviceID), Bot.BotName);
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return;
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}
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DeviceID = deviceID;
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}
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internal async Task<bool> HandleConfirmations(HashSet<Confirmation> confirmations, bool accept) {
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if ((confirmations == null) || (confirmations.Count == 0)) {
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Logging.LogNullError(nameof(confirmations), Bot.BotName);
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return false;
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}
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uint time = await GetSteamTime().ConfigureAwait(false);
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if (time == 0) {
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Logging.LogNullError(nameof(time), Bot.BotName);
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return false;
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}
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string confirmationHash = GenerateConfirmationKey(time, "conf");
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if (string.IsNullOrEmpty(confirmationHash)) {
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Logging.LogNullError(nameof(confirmationHash), Bot.BotName);
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return false;
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}
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if (confirmations.Count <= MaxConfirmationsPerRequest) {
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return await Bot.ArchiWebHandler.HandleConfirmations(DeviceID, confirmationHash, time, confirmations, accept).ConfigureAwait(false);
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}
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HashSet<Confirmation> pendingConfirmations = new HashSet<Confirmation>(confirmations);
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do {
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HashSet<Confirmation> currentConfirmations = new HashSet<Confirmation>(pendingConfirmations.Take(MaxConfirmationsPerRequest));
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if (!await Bot.ArchiWebHandler.HandleConfirmations(DeviceID, confirmationHash, time, currentConfirmations, accept).ConfigureAwait(false)) {
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return false;
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}
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pendingConfirmations.ExceptWith(currentConfirmations);
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} while (pendingConfirmations.Count > 0);
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return true;
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}
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internal async Task<Steam.ConfirmationDetails> GetConfirmationDetails(Confirmation confirmation) {
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if (confirmation == null) {
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Logging.LogNullError(nameof(confirmation), Bot.BotName);
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return null;
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}
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uint time = await GetSteamTime().ConfigureAwait(false);
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if (time == 0) {
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Logging.LogNullError(nameof(time), Bot.BotName);
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return null;
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}
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string confirmationHash = GenerateConfirmationKey(time, "conf");
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if (string.IsNullOrEmpty(confirmationHash)) {
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Logging.LogNullError(nameof(confirmationHash), Bot.BotName);
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return null;
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}
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Steam.ConfirmationDetails response = await Bot.ArchiWebHandler.GetConfirmationDetails(DeviceID, confirmationHash, time, confirmation).ConfigureAwait(false);
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if ((response == null) || !response.Success) {
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return null;
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}
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return response;
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}
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internal async Task<string> GenerateToken() {
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uint time = await GetSteamTime().ConfigureAwait(false);
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if (time != 0) {
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return GenerateTokenForTime(time);
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}
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Logging.LogNullError(nameof(time), Bot.BotName);
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return null;
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}
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internal async Task<HashSet<Confirmation>> GetConfirmations() {
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uint time = await GetSteamTime().ConfigureAwait(false);
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if (time == 0) {
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Logging.LogNullError(nameof(time), Bot.BotName);
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return null;
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}
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string confirmationHash = GenerateConfirmationKey(time, "conf");
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if (string.IsNullOrEmpty(confirmationHash)) {
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Logging.LogNullError(nameof(confirmationHash), Bot.BotName);
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return null;
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}
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HtmlDocument htmlDocument = await Bot.ArchiWebHandler.GetConfirmations(DeviceID, confirmationHash, time).ConfigureAwait(false);
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HtmlNodeCollection confirmationNodes = htmlDocument?.DocumentNode.SelectNodes("//div[@class='mobileconf_list_entry']");
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if (confirmationNodes == null) {
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return null;
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}
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HashSet<Confirmation> result = new HashSet<Confirmation>();
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foreach (HtmlNode confirmationNode in confirmationNodes) {
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string idString = confirmationNode.GetAttributeValue("data-confid", null);
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if (string.IsNullOrEmpty(idString)) {
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Logging.LogNullError(nameof(idString), Bot.BotName);
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return null;
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}
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uint id;
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if (!uint.TryParse(idString, out id) || (id == 0)) {
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Logging.LogNullError(nameof(id), Bot.BotName);
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return null;
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}
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string keyString = confirmationNode.GetAttributeValue("data-key", null);
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if (string.IsNullOrEmpty(keyString)) {
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Logging.LogNullError(nameof(keyString), Bot.BotName);
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return null;
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}
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ulong key;
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if (!ulong.TryParse(keyString, out key) || (key == 0)) {
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Logging.LogNullError(nameof(key), Bot.BotName);
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return null;
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}
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HtmlNode descriptionNode = confirmationNode.SelectSingleNode(".//div[@class='mobileconf_list_entry_description']/div");
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if (descriptionNode == null) {
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Logging.LogNullError(nameof(descriptionNode), Bot.BotName);
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return null;
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}
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Steam.ConfirmationDetails.EType type;
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string description = descriptionNode.InnerText;
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if (description.Equals("Sell - Market Listing")) {
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type = Steam.ConfirmationDetails.EType.Market;
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} else if (description.StartsWith("Trade with ", StringComparison.Ordinal)) {
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type = Steam.ConfirmationDetails.EType.Trade;
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} else {
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type = Steam.ConfirmationDetails.EType.Other;
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}
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result.Add(new Confirmation(id, key, type));
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}
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return result;
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}
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internal async Task<uint> GetSteamTime() {
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if (SteamTimeDifference != 0) {
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return (uint) (Utilities.GetUnixTime() + SteamTimeDifference);
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}
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await TimeSemaphore.WaitAsync().ConfigureAwait(false);
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if (SteamTimeDifference == 0) {
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uint serverTime = Bot.ArchiWebHandler.GetServerTime();
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if (serverTime != 0) {
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SteamTimeDifference = (short) (serverTime - Utilities.GetUnixTime());
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}
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}
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TimeSemaphore.Release();
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return (uint) (Utilities.GetUnixTime() + SteamTimeDifference);
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}
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private string GenerateTokenForTime(uint time) {
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if (time == 0) {
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Logging.LogNullError(nameof(time), Bot.BotName);
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return null;
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}
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byte[] sharedSecret = Convert.FromBase64String(SharedSecret);
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byte[] timeArray = BitConverter.GetBytes((long) time / CodeInterval);
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if (BitConverter.IsLittleEndian) {
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Array.Reverse(timeArray);
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}
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byte[] hash;
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using (HMACSHA1 hmac = new HMACSHA1(sharedSecret)) {
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hash = hmac.ComputeHash(timeArray);
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}
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// The last 4 bits of the mac say where the code starts
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int start = hash[hash.Length - 1] & 0x0f;
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// Extract those 4 bytes
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byte[] bytes = new byte[4];
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Array.Copy(hash, start, bytes, 0, 4);
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if (BitConverter.IsLittleEndian) {
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Array.Reverse(bytes);
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}
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uint fullCode = BitConverter.ToUInt32(bytes, 0) & 0x7fffffff;
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// Build the alphanumeric code
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StringBuilder code = new StringBuilder();
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for (byte i = 0; i < CodeDigits; i++) {
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code.Append(CodeCharacters[fullCode % CodeCharacters.Length]);
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fullCode /= (uint) CodeCharacters.Length;
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}
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return code.ToString();
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}
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private string GenerateConfirmationKey(uint time, string tag = null) {
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if (time == 0) {
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Logging.LogNullError(nameof(time), Bot.BotName);
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return null;
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}
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byte[] identitySecret = Convert.FromBase64String(IdentitySecret);
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byte bufferSize = 8;
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if (!string.IsNullOrEmpty(tag)) {
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bufferSize += (byte) Math.Min(32, tag.Length);
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}
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byte[] timeArray = BitConverter.GetBytes((long) time);
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if (BitConverter.IsLittleEndian) {
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Array.Reverse(timeArray);
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}
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byte[] buffer = new byte[bufferSize];
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Array.Copy(timeArray, buffer, 8);
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if (!string.IsNullOrEmpty(tag)) {
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Array.Copy(Encoding.UTF8.GetBytes(tag), 0, buffer, 8, bufferSize - 8);
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}
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byte[] hash;
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using (HMACSHA1 hmac = new HMACSHA1(identitySecret)) {
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hash = hmac.ComputeHash(buffer);
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}
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return Convert.ToBase64String(hash, Base64FormattingOptions.None);
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}
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}
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}
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