119 lines
4.9 KiB
C#
119 lines
4.9 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Linq;
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using System.Net;
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using System.Web;
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using ASC.Common.Logging;
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using ASC.Common.Utils;
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using ASC.Core;
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using ASC.Core.Tenants;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Extensions;
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namespace ASC.IPSecurity
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{
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public static class IPSecurity
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{
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private static readonly ILog Log = LogManager.GetLogger("ASC.IPSecurity");
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private static bool? _ipSecurityEnabled;
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public static bool IpSecurityEnabled
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{
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get
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{
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if (_ipSecurityEnabled.HasValue) return _ipSecurityEnabled.Value;
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var hideSettings = (ConfigurationManager.AppSettings["web.hide-settings"] ?? "").Split(new[] { ',', ';', ' ' });
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return (_ipSecurityEnabled = !hideSettings.Contains("IpSecurity", StringComparer.CurrentCultureIgnoreCase)).Value;
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}
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}
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private static readonly string CurrentIpForTest = ConfigurationManager.AppSettings["ipsecurity.test"];
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public static bool Verify(HttpContext httpContext, Tenant tenant)
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{
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if (!IpSecurityEnabled) return true;
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if (httpContext == null) return true;
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if (tenant == null || SecurityContext.CurrentAccount.ID == tenant.OwnerId) return true;
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string requestIps = null;
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try
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{
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var restrictions = IPRestrictionsService.Get(tenant.TenantId).ToList();
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if (!restrictions.Any()) return true;
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if (string.IsNullOrWhiteSpace(requestIps = CurrentIpForTest))
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{
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var request = httpContext.Request;
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requestIps = request.Headers["X-Forwarded-For"].FirstOrDefault() ?? request.GetUserHostAddress();
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}
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var ips = string.IsNullOrWhiteSpace(requestIps)
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? new string[] { }
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: requestIps.Split(new[] { ",", " " }, StringSplitOptions.RemoveEmptyEntries);
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if (ips.Any(requestIp => restrictions.Any(restriction => MatchIPs(GetIpWithoutPort(requestIp), restriction.Ip))))
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{
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return true;
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}
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}
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catch (Exception ex)
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{
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Log.ErrorFormat("Can't verify request with IP-address: {0}. Tenant: {1}. Error: {2} ", requestIps ?? "", tenant, ex);
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return false;
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}
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Log.InfoFormat("Restricted from IP-address: {0}. Tenant: {1}. Request to: {2}", requestIps ?? "", tenant, httpContext.Request.GetDisplayUrl());
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return false;
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}
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private static bool MatchIPs(string requestIp, string restrictionIp)
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{
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var dividerIdx = restrictionIp.IndexOf('-');
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if (restrictionIp.IndexOf('-') > 0)
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{
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var lower = IPAddress.Parse(restrictionIp.Substring(0, dividerIdx).Trim());
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var upper = IPAddress.Parse(restrictionIp.Substring(dividerIdx + 1).Trim());
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var range = new IPAddressRange(lower, upper);
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return range.IsInRange(IPAddress.Parse(requestIp));
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}
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return requestIp == restrictionIp;
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}
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private static string GetIpWithoutPort(string ip)
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{
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var portIdx = ip.IndexOf(':');
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return portIdx > 0 ? ip.Substring(0, portIdx) : ip;
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}
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}
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} |