181 lines
6.2 KiB
C#
181 lines
6.2 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Web.Core.Sms;
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[Singletone]
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public class SmsKeyStorageCache
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{
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private readonly ICacheNotify<SmsKeyCacheKey> _keyCacheNotify;
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private readonly ICache _keyCache;
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public SmsKeyStorageCache(ICacheNotify<SmsKeyCacheKey> keyCacheNotify, ICache cache)
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{
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_keyCache = cache;
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_keyCacheNotify = keyCacheNotify;
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_keyCacheNotify.Subscribe(r => _keyCache.Remove(r.Key), CacheNotifyAction.Remove);
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}
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public void RemoveFromCache(string cacheKey)
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{
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_keyCacheNotify.Publish(new SmsKeyCacheKey { Key = cacheKey }, CacheNotifyAction.Remove);
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}
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}
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[Scope]
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public class SmsKeyStorage
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{
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private readonly int _keyLength;
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public readonly TimeSpan StoreInterval;
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private readonly int _attemptCount;
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private static readonly object _keyLocker = new object();
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private readonly ICache _keyCache;
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private readonly ICache _checkCache;
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private readonly TenantManager _tenantManager;
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private readonly SmsKeyStorageCache _smsKeyStorageCache;
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public SmsKeyStorage(TenantManager tenantManager, IConfiguration configuration, SmsKeyStorageCache smsKeyStorageCache, ICache cache)
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{
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_keyCache = cache;
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_checkCache = cache;
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_tenantManager = tenantManager;
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_smsKeyStorageCache = smsKeyStorageCache;
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if (!int.TryParse(configuration["sms:keylength"], out _keyLength))
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{
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_keyLength = 6;
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}
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if (!int.TryParse(configuration["sms:keystore"], out var store))
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{
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store = 10;
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}
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StoreInterval = TimeSpan.FromMinutes(store);
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if (!int.TryParse(configuration["sms:keycount"], out _attemptCount))
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{
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_attemptCount = 5;
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}
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}
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private string BuildCacheKey(string phone)
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{
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var tenant = _tenantManager.GetCurrentTenant(false);
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var tenantCache = tenant == null ? Tenant.DefaultTenant : tenant.Id;
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return "smskey" + phone + tenantCache;
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}
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public bool GenerateKey(string phone, out string key)
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{
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ArgumentNullOrEmptyException.ThrowIfNullOrEmpty(phone);
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lock (_keyLocker)
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{
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var cacheKey = BuildCacheKey(phone);
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var phoneKeys = _keyCache.Get<Dictionary<string, DateTime>>(cacheKey) ?? new Dictionary<string, DateTime>();
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if (phoneKeys.Count > _attemptCount)
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{
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key = null;
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return false;
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}
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key = RandomNumberGenerator.GetInt32((int)Math.Pow(10, _keyLength - 1), (int)Math.Pow(10, _keyLength)).ToString(CultureInfo.InvariantCulture);
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phoneKeys[key] = DateTime.UtcNow;
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_keyCache.Insert(cacheKey, phoneKeys, DateTime.UtcNow.Add(StoreInterval));
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return true;
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}
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}
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public bool ExistsKey(string phone)
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{
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if (string.IsNullOrEmpty(phone))
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{
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return false;
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}
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lock (_keyLocker)
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{
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var cacheKey = BuildCacheKey(phone);
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var phoneKeys = _keyCache.Get<Dictionary<string, DateTime>>(cacheKey);
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return phoneKeys != null;
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}
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}
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public Result ValidateKey(string phone, string key)
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{
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key = (key ?? string.Empty).Trim();
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if (string.IsNullOrEmpty(phone) || string.IsNullOrEmpty(key))
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{
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return Result.Empty;
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}
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var cacheCheck = BuildCacheKey("check" + phone);
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int.TryParse(_checkCache.Get<string>(cacheCheck), out var counter);
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if (++counter > _attemptCount)
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{
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return Result.TooMuch;
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}
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_checkCache.Insert(cacheCheck, counter.ToString(CultureInfo.InvariantCulture), DateTime.UtcNow.Add(StoreInterval));
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lock (_keyLocker)
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{
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var cacheKey = BuildCacheKey(phone);
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var phoneKeys = _keyCache.Get<Dictionary<string, DateTime>>(cacheKey);
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if (phoneKeys == null)
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{
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return Result.Timeout;
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}
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if (!phoneKeys.ContainsKey(key))
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{
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return Result.Invalide;
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}
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var createDate = phoneKeys[key];
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_smsKeyStorageCache.RemoveFromCache(cacheKey);
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if (createDate.Add(StoreInterval) < DateTime.UtcNow)
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{
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return Result.Timeout;
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}
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_checkCache.Insert(cacheCheck, (counter - 1).ToString(CultureInfo.InvariantCulture), DateTime.UtcNow.Add(StoreInterval));
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return Result.Ok;
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}
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}
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public enum Result
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{
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Ok,
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Invalide,
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Empty,
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TooMuch,
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Timeout,
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}
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}
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