/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSimulator Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections.Generic; using System.Net; using System.Reflection; using System.Text.RegularExpressions; using OpenSim.Framework; using OpenSim.Services.Interfaces; using GridRegion = OpenSim.Services.Interfaces.GridRegion; using OpenSim.Server.Base; using OpenSim.Services.Connectors.Hypergrid; using OpenMetaverse; using Nini.Config; using log4net; namespace OpenSim.Services.HypergridService { public class GatekeeperService : IGatekeeperService { private static readonly ILog m_log = LogManager.GetLogger( MethodBase.GetCurrentMethod().DeclaringType); private static bool m_Initialized = false; private static IGridService m_GridService; private static IPresenceService m_PresenceService; private static IUserAccountService m_UserAccountService; private static IUserAgentService m_UserAgentService; private static ISimulationService m_SimulationService; protected string m_AllowedClients = string.Empty; protected string m_DeniedClients = string.Empty; private static bool m_ForeignAgentsAllowed = true; private static UUID m_ScopeID; private static bool m_AllowTeleportsToAnyRegion; private static string m_ExternalName; private static GridRegion m_DefaultGatewayRegion; public GatekeeperService(IConfigSource config, ISimulationService simService) { if (!m_Initialized) { m_Initialized = true; IConfig serverConfig = config.Configs["GatekeeperService"]; if (serverConfig == null) throw new Exception(String.Format("No section GatekeeperService in config file")); string accountService = serverConfig.GetString("UserAccountService", String.Empty); string homeUsersService = serverConfig.GetString("UserAgentService", string.Empty); string gridService = serverConfig.GetString("GridService", String.Empty); string presenceService = serverConfig.GetString("PresenceService", String.Empty); string simulationService = serverConfig.GetString("SimulationService", String.Empty); // These 3 are mandatory, the others aren't if (gridService == string.Empty || presenceService == string.Empty) throw new Exception("Incomplete specifications, Gatekeeper Service cannot function."); string scope = serverConfig.GetString("ScopeID", UUID.Zero.ToString()); UUID.TryParse(scope, out m_ScopeID); //m_WelcomeMessage = serverConfig.GetString("WelcomeMessage", "Welcome to OpenSim!"); m_AllowTeleportsToAnyRegion = serverConfig.GetBoolean("AllowTeleportsToAnyRegion", true); m_ExternalName = serverConfig.GetString("ExternalName", string.Empty); if (m_ExternalName != string.Empty && !m_ExternalName.EndsWith("/")) m_ExternalName = m_ExternalName + "/"; Object[] args = new Object[] { config }; m_GridService = ServerUtils.LoadPlugin<IGridService>(gridService, args); m_PresenceService = ServerUtils.LoadPlugin<IPresenceService>(presenceService, args); if (accountService != string.Empty) m_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(accountService, args); if (homeUsersService != string.Empty) m_UserAgentService = ServerUtils.LoadPlugin<IUserAgentService>(homeUsersService, args); if (simService != null) m_SimulationService = simService; else if (simulationService != string.Empty) m_SimulationService = ServerUtils.LoadPlugin<ISimulationService>(simulationService, args); m_AllowedClients = serverConfig.GetString("AllowedClients", string.Empty); m_DeniedClients = serverConfig.GetString("DeniedClients", string.Empty); m_ForeignAgentsAllowed = serverConfig.GetBoolean("ForeignAgentsAllowed", true); if (m_GridService == null || m_PresenceService == null || m_SimulationService == null) throw new Exception("Unable to load a required plugin, Gatekeeper Service cannot function."); m_log.Debug("[GATEKEEPER SERVICE]: Starting..."); } } public GatekeeperService(IConfigSource config) : this(config, null) { } public bool LinkRegion(string regionName, out UUID regionID, out ulong regionHandle, out string externalName, out string imageURL, out string reason) { regionID = UUID.Zero; regionHandle = 0; externalName = m_ExternalName + ((regionName != string.Empty) ? " " + regionName : ""); imageURL = string.Empty; reason = string.Empty; GridRegion region = null; m_log.DebugFormat("[GATEKEEPER SERVICE]: Request to link to {0}", (regionName == string.Empty)? "default region" : regionName); if (!m_AllowTeleportsToAnyRegion || regionName == string.Empty) { List<GridRegion> defs = m_GridService.GetDefaultRegions(m_ScopeID); if (defs != null && defs.Count > 0) { region = defs[0]; m_DefaultGatewayRegion = region; } else { reason = "Grid setup problem. Try specifying a particular region here."; m_log.DebugFormat("[GATEKEEPER SERVICE]: Unable to send information. Please specify a default region for this grid!"); return false; } } else { region = m_GridService.GetRegionByName(m_ScopeID, regionName); if (region == null) { reason = "Region not found"; return false; } } regionID = region.RegionID; regionHandle = region.RegionHandle; string regionimage = "regionImage" + regionID.ToString(); regionimage = regionimage.Replace("-", ""); imageURL = region.ServerURI + "index.php?method=" + regionimage; return true; } public GridRegion GetHyperlinkRegion(UUID regionID) { m_log.DebugFormat("[GATEKEEPER SERVICE]: Request to get hyperlink region {0}", regionID); if (!m_AllowTeleportsToAnyRegion) // Don't even check the given regionID return m_DefaultGatewayRegion; GridRegion region = m_GridService.GetRegionByUUID(m_ScopeID, regionID); return region; } #region Login Agent public bool LoginAgent(AgentCircuitData aCircuit, GridRegion destination, out string reason) { reason = string.Empty; string authURL = string.Empty; if (aCircuit.ServiceURLs.ContainsKey("HomeURI")) authURL = aCircuit.ServiceURLs["HomeURI"].ToString(); m_log.InfoFormat("[GATEKEEPER SERVICE]: Login request for {0} {1} @ {2} ({3}) at {4} using viewer {5}, channel {6}, IP {7}, Mac {8}, Id0 {9} Teleport Flags {10}", aCircuit.firstname, aCircuit.lastname, authURL, aCircuit.AgentID, destination.RegionName, aCircuit.Viewer, aCircuit.Channel, aCircuit.IPAddress, aCircuit.Mac, aCircuit.Id0, aCircuit.teleportFlags.ToString()); // // Check client // if (m_AllowedClients != string.Empty) { Regex arx = new Regex(m_AllowedClients); Match am = arx.Match(aCircuit.Viewer); if (!am.Success) { m_log.InfoFormat("[GATEKEEPER SERVICE]: Login failed, reason: client {0} is not allowed", aCircuit.Viewer); return false; } } if (m_DeniedClients != string.Empty) { Regex drx = new Regex(m_DeniedClients); Match dm = drx.Match(aCircuit.Viewer); if (dm.Success) { m_log.InfoFormat("[GATEKEEPER SERVICE]: Login failed, reason: client {0} is denied", aCircuit.Viewer); return false; } } // // Authenticate the user // if (!Authenticate(aCircuit)) { reason = "Unable to verify identity"; m_log.InfoFormat("[GATEKEEPER SERVICE]: Unable to verify identity of agent {0} {1}. Refusing service.", aCircuit.firstname, aCircuit.lastname); return false; } m_log.DebugFormat("[GATEKEEPER SERVICE]: Identity verified for {0} {1} @ {2}", aCircuit.firstname, aCircuit.lastname, authURL); // // Check for impersonations // UserAccount account = null; if (m_UserAccountService != null) { // Check to see if we have a local user with that UUID account = m_UserAccountService.GetUserAccount(m_ScopeID, aCircuit.AgentID); if (account != null) { // Make sure this is the user coming home, and not a foreign user with same UUID as a local user if (m_UserAgentService != null) { if (!m_UserAgentService.IsAgentComingHome(aCircuit.SessionID, m_ExternalName)) { // Can't do, sorry reason = "Unauthorized"; m_log.InfoFormat("[GATEKEEPER SERVICE]: Foreign agent {0} {1} has same ID as local user. Refusing service.", aCircuit.firstname, aCircuit.lastname); return false; } } } } m_log.DebugFormat("[GATEKEEPER SERVICE]: User is ok"); // // Foreign agents allowed // if (account == null && !m_ForeignAgentsAllowed) { reason = "Unauthorized"; m_log.InfoFormat("[GATEKEEPER SERVICE]: Foreign agents are not permitted {0} {1}. Refusing service.", aCircuit.firstname, aCircuit.lastname); return false; } // May want to authorize bool isFirstLogin = false; // // Login the presence, if it's not there yet (by the login service) // PresenceInfo presence = m_PresenceService.GetAgent(aCircuit.SessionID); if (presence != null) // it has been placed there by the login service isFirstLogin = true; else if (!m_PresenceService.LoginAgent(aCircuit.AgentID.ToString(), aCircuit.SessionID, aCircuit.SecureSessionID)) { reason = "Unable to login presence"; m_log.InfoFormat("[GATEKEEPER SERVICE]: Presence login failed for foreign agent {0} {1}. Refusing service.", aCircuit.firstname, aCircuit.lastname); return false; } m_log.DebugFormat("[GATEKEEPER SERVICE]: Login presence ok"); // // Get the region // destination = m_GridService.GetRegionByUUID(m_ScopeID, destination.RegionID); if (destination == null) { reason = "Destination region not found"; return false; } m_log.DebugFormat("[GATEKEEPER SERVICE]: destination ok: {0}", destination.RegionName); // // Adjust the visible name // if (account != null) { aCircuit.firstname = account.FirstName; aCircuit.lastname = account.LastName; } if (account == null) { if (!aCircuit.lastname.StartsWith("@")) aCircuit.firstname = aCircuit.firstname + "." + aCircuit.lastname; try { Uri uri = new Uri(aCircuit.ServiceURLs["HomeURI"].ToString()); aCircuit.lastname = "@" + uri.Host; // + ":" + uri.Port; } catch { m_log.WarnFormat("[GATEKEEPER SERVICE]: Malformed HomeURI (this should never happen): {0}", aCircuit.ServiceURLs["HomeURI"]); aCircuit.lastname = "@" + aCircuit.ServiceURLs["HomeURI"].ToString(); } } // // Finally launch the agent at the destination // Constants.TeleportFlags loginFlag = isFirstLogin ? Constants.TeleportFlags.ViaLogin : Constants.TeleportFlags.ViaHGLogin; // Preserve our TeleportFlags we have gathered so-far loginFlag |= (Constants.TeleportFlags) aCircuit.teleportFlags; m_log.DebugFormat("[GATEKEEPER SERVICE]: launching agent {0}", loginFlag); return m_SimulationService.CreateAgent(destination, aCircuit, (uint)loginFlag, out reason); } protected bool Authenticate(AgentCircuitData aCircuit) { if (!CheckAddress(aCircuit.ServiceSessionID)) return false; string userURL = string.Empty; if (aCircuit.ServiceURLs.ContainsKey("HomeURI")) userURL = aCircuit.ServiceURLs["HomeURI"].ToString(); if (userURL == string.Empty) { m_log.DebugFormat("[GATEKEEPER SERVICE]: Agent did not provide an authentication server URL"); return false; } if (userURL == m_ExternalName) { return m_UserAgentService.VerifyAgent(aCircuit.SessionID, aCircuit.ServiceSessionID); } else { IUserAgentService userAgentService = new UserAgentServiceConnector(userURL); try { return userAgentService.VerifyAgent(aCircuit.SessionID, aCircuit.ServiceSessionID); } catch { m_log.DebugFormat("[GATEKEEPER SERVICE]: Unable to contact authentication service at {0}", userURL); return false; } } } // Check that the service token was generated for *this* grid. // If it wasn't then that's a fake agent. protected bool CheckAddress(string serviceToken) { string[] parts = serviceToken.Split(new char[] { ';' }); if (parts.Length < 2) return false; char[] trailing_slash = new char[] { '/' }; string addressee = parts[0].TrimEnd(trailing_slash); string externalname = m_ExternalName.TrimEnd(trailing_slash); m_log.DebugFormat("[GATEKEEPER SERVICE]: Verifying {0} against {1}", addressee, externalname); return string.Equals(addressee, externalname, StringComparison.OrdinalIgnoreCase); } #endregion #region Misc #endregion } }