From b0bbe861cd0f3eb06de73a371ab961428c549c69 Mon Sep 17 00:00:00 2001
From: Diva Canto
Date: Sun, 10 Jan 2010 17:15:02 -0800
Subject: Moved OpenId authentication from user server to
 Server.Handlers.Authentication.

---
 .../Handlers/Authentication/OpenIdServerHandler.cs | 345 +++++++++++++++++++++
 1 file changed, 345 insertions(+)
 create mode 100644 OpenSim/Server/Handlers/Authentication/OpenIdServerHandler.cs

(limited to 'OpenSim/Server/Handlers/Authentication/OpenIdServerHandler.cs')

diff --git a/OpenSim/Server/Handlers/Authentication/OpenIdServerHandler.cs b/OpenSim/Server/Handlers/Authentication/OpenIdServerHandler.cs
new file mode 100644
index 0000000..e73961b
--- /dev/null
+++ b/OpenSim/Server/Handlers/Authentication/OpenIdServerHandler.cs
@@ -0,0 +1,345 @@
+/*
+ * 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.Collections.Specialized;
+using System.IO;
+using System.Net;
+using System.Web;
+using DotNetOpenId;
+using DotNetOpenId.Provider;
+using OpenSim.Framework;
+using OpenSim.Framework.Servers;
+using OpenSim.Framework.Servers.HttpServer;
+using OpenSim.Server.Handlers.Base;
+using OpenSim.Services.Interfaces;
+using Nini.Config;
+using OpenMetaverse;
+
+namespace OpenSim.Server.Handlers.Authentication
+{
+    /// <summary>
+    /// Temporary, in-memory store for OpenID associations
+    /// </summary>
+    public class ProviderMemoryStore : IAssociationStore<AssociationRelyingPartyType>
+    {
+        private class AssociationItem
+        {
+            public AssociationRelyingPartyType DistinguishingFactor;
+            public string Handle;
+            public DateTime Expires;
+            public byte[] PrivateData;
+        }
+
+        Dictionary<string, AssociationItem> m_store = new Dictionary<string, AssociationItem>();
+        SortedList<DateTime, AssociationItem> m_sortedStore = new SortedList<DateTime, AssociationItem>();
+        object m_syncRoot = new object();
+
+        #region IAssociationStore<AssociationRelyingPartyType> Members
+
+        public void StoreAssociation(AssociationRelyingPartyType distinguishingFactor, Association assoc)
+        {
+            AssociationItem item = new AssociationItem();
+            item.DistinguishingFactor = distinguishingFactor;
+            item.Handle = assoc.Handle;
+            item.Expires = assoc.Expires.ToLocalTime();
+            item.PrivateData = assoc.SerializePrivateData();
+
+            lock (m_syncRoot)
+            {
+                m_store[item.Handle] = item;
+                m_sortedStore[item.Expires] = item;
+            }
+        }
+
+        public Association GetAssociation(AssociationRelyingPartyType distinguishingFactor)
+        {
+            lock (m_syncRoot)
+            {
+                if (m_sortedStore.Count > 0)
+                {
+                    AssociationItem item = m_sortedStore.Values[m_sortedStore.Count - 1];
+                    return Association.Deserialize(item.Handle, item.Expires.ToUniversalTime(), item.PrivateData);
+                }
+                else
+                {
+                    return null;
+                }
+            }
+        }
+
+        public Association GetAssociation(AssociationRelyingPartyType distinguishingFactor, string handle)
+        {
+            AssociationItem item;
+            bool success = false;
+            lock (m_syncRoot)
+                success = m_store.TryGetValue(handle, out item);
+
+            if (success)
+                return Association.Deserialize(item.Handle, item.Expires.ToUniversalTime(), item.PrivateData);
+            else
+                return null;
+        }
+
+        public bool RemoveAssociation(AssociationRelyingPartyType distinguishingFactor, string handle)
+        {
+            lock (m_syncRoot)
+            {
+                for (int i = 0; i < m_sortedStore.Values.Count; i++)
+                {
+                    AssociationItem item = m_sortedStore.Values[i];
+                    if (item.Handle == handle)
+                    {
+                        m_sortedStore.RemoveAt(i);
+                        break;
+                    }
+                }
+
+                return m_store.Remove(handle);
+            }
+        }
+
+        public void ClearExpiredAssociations()
+        {
+            lock (m_syncRoot)
+            {
+                List<AssociationItem> itemsCopy = new List<AssociationItem>(m_sortedStore.Values);
+                DateTime now = DateTime.Now;
+
+                for (int i = 0; i < itemsCopy.Count; i++)
+                {
+                    AssociationItem item = itemsCopy[i];
+
+                    if (item.Expires <= now)
+                    {
+                        m_sortedStore.RemoveAt(i);
+                        m_store.Remove(item.Handle);
+                    }
+                }
+            }
+        }
+
+        #endregion
+    }
+
+    public class OpenIdStreamHandler : IStreamHandler
+    {
+        #region HTML
+
+        /// <summary>Login form used to authenticate OpenID requests</summary>
+        const string LOGIN_PAGE =
+@"<html>
+<head><title>OpenSim OpenID Login</title></head>
+<body>
+<h3>OpenSim Login</h3>
+<form method=""post"">
+<label for=""first"">First Name:</label> <input readonly type=""text"" name=""first"" id=""first"" value=""{0}""/>
+<label for=""last"">Last Name:</label> <input readonly type=""text"" name=""last"" id=""last"" value=""{1}""/>
+<label for=""pass"">Password:</label> <input type=""password"" name=""pass"" id=""pass""/>
+<input type=""submit"" value=""Login"">
+</form>
+</body>
+</html>";
+
+        /// <summary>Page shown for a valid OpenID identity</summary>
+        const string OPENID_PAGE =
+@"<html>
+<head>
+<title>{2} {3}</title>
+<link rel=""openid2.provider openid.server"" href=""{0}://{1}/openid/server/""/>
+</head>
+<body>OpenID identifier for {2} {3}</body>
+</html>
+";
+
+        /// <summary>Page shown for an invalid OpenID identity</summary>
+        const string INVALID_OPENID_PAGE = 
+@"<html><head><title>Identity not found</title></head>
+<body>Invalid OpenID identity</body></html>";
+
+        /// <summary>Page shown if the OpenID endpoint is requested directly</summary>
+        const string ENDPOINT_PAGE =
+@"<html><head><title>OpenID Endpoint</title></head><body>
+This is an OpenID server endpoint, not a human-readable resource. 
+For more information, see <a href='http://openid.net/'>http://openid.net/</a>.
+</body></html>";
+
+        #endregion HTML
+
+        public string ContentType { get { return m_contentType; } }
+        public string HttpMethod { get { return m_httpMethod; } }
+        public string Path { get { return m_path; } }
+
+        string m_contentType;
+        string m_httpMethod;
+        string m_path;
+        IAuthenticationService m_authenticationService;
+        IUserAccountService m_userAccountService;
+        ProviderMemoryStore m_openidStore = new ProviderMemoryStore();
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        public OpenIdStreamHandler(string httpMethod, string path, IUserAccountService userService, IAuthenticationService authService)
+        {
+            m_authenticationService = authService;
+            m_userAccountService = userService;
+            m_httpMethod = httpMethod;
+            m_path = path;
+
+            m_contentType = "text/html";
+        }
+
+        /// <summary>
+        /// Handles all GET and POST requests for OpenID identifier pages and endpoint
+        /// server communication
+        /// </summary>
+        public void Handle(string path, Stream request, Stream response, OSHttpRequest httpRequest, OSHttpResponse httpResponse)
+        {
+            Uri providerEndpoint = new Uri(String.Format("{0}://{1}{2}", httpRequest.Url.Scheme, httpRequest.Url.Authority, httpRequest.Url.AbsolutePath));
+
+            // Defult to returning HTML content
+            m_contentType = "text/html";
+
+            try
+            {
+                NameValueCollection postQuery = HttpUtility.ParseQueryString(new StreamReader(httpRequest.InputStream).ReadToEnd());
+                NameValueCollection getQuery = HttpUtility.ParseQueryString(httpRequest.Url.Query);
+                NameValueCollection openIdQuery = (postQuery.GetValues("openid.mode") != null ? postQuery : getQuery);
+
+                OpenIdProvider provider = new OpenIdProvider(m_openidStore, providerEndpoint, httpRequest.Url, openIdQuery);
+
+                if (provider.Request != null)
+                {
+                    if (!provider.Request.IsResponseReady && provider.Request is IAuthenticationRequest)
+                    {
+                        IAuthenticationRequest authRequest = (IAuthenticationRequest)provider.Request;
+                        string[] passwordValues = postQuery.GetValues("pass");
+
+                        UserAccount account;
+                        if (TryGetAccount(new Uri(authRequest.ClaimedIdentifier.ToString()), out account))
+                        {
+                            // Check for form POST data
+                            if (passwordValues != null && passwordValues.Length == 1)
+                            {
+                                if (account != null && 
+                                    (m_authenticationService.Authenticate(account.PrincipalID, passwordValues[0], 30) != string.Empty))
+                                    authRequest.IsAuthenticated = true;
+                                else
+                                    authRequest.IsAuthenticated = false;
+                            }
+                            else
+                            {
+                                // Authentication was requested, send the client a login form
+                                using (StreamWriter writer = new StreamWriter(response))
+                                    writer.Write(String.Format(LOGIN_PAGE, account.FirstName, account.LastName));
+                                return;
+                            }
+                        }
+                        else
+                        {
+                            // Cannot find an avatar matching the claimed identifier
+                            authRequest.IsAuthenticated = false;
+                        }
+                    }
+
+                    // Add OpenID headers to the response
+                    foreach (string key in provider.Request.Response.Headers.Keys)
+                        httpResponse.AddHeader(key, provider.Request.Response.Headers[key]);
+
+                    string[] contentTypeValues = provider.Request.Response.Headers.GetValues("Content-Type");
+                    if (contentTypeValues != null && contentTypeValues.Length == 1)
+                        m_contentType = contentTypeValues[0];
+
+                    // Set the response code and document body based on the OpenID result
+                    httpResponse.StatusCode = (int)provider.Request.Response.Code;
+                    response.Write(provider.Request.Response.Body, 0, provider.Request.Response.Body.Length);
+                    response.Close();
+                }
+                else if (httpRequest.Url.AbsolutePath.Contains("/openid/server"))
+                {
+                    // Standard HTTP GET was made on the OpenID endpoint, send the client the default error page
+                    using (StreamWriter writer = new StreamWriter(response))
+                        writer.Write(ENDPOINT_PAGE);
+                }
+                else
+                {
+                    // Try and lookup this avatar
+                    UserAccount account;
+                    if (TryGetAccount(httpRequest.Url, out account))
+                    {
+                        using (StreamWriter writer = new StreamWriter(response))
+                        {
+                            // TODO: Print out a full profile page for this avatar
+                            writer.Write(String.Format(OPENID_PAGE, httpRequest.Url.Scheme,
+                                httpRequest.Url.Authority, account.FirstName, account.LastName));
+                        }
+                    }
+                    else
+                    {
+                        // Couldn't parse an avatar name, or couldn't find the avatar in the user server
+                        using (StreamWriter writer = new StreamWriter(response))
+                            writer.Write(INVALID_OPENID_PAGE);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                httpResponse.StatusCode = (int)HttpStatusCode.InternalServerError;
+                using (StreamWriter writer = new StreamWriter(response))
+                    writer.Write(ex.Message);
+            }
+        }
+
+        /// <summary>
+        /// Parse a URL with a relative path of the form /users/First_Last and try to
+        /// retrieve the profile matching that avatar name
+        /// </summary>
+        /// <param name="requestUrl">URL to parse for an avatar name</param>
+        /// <param name="profile">Profile data for the avatar</param>
+        /// <returns>True if the parse and lookup were successful, otherwise false</returns>
+        bool TryGetAccount(Uri requestUrl, out UserAccount account)
+        {
+            if (requestUrl.Segments.Length == 3 && requestUrl.Segments[1] == "users/")
+            {
+                // Parse the avatar name from the path
+                string username = requestUrl.Segments[requestUrl.Segments.Length - 1];
+                string[] name = username.Split('_');
+
+                if (name.Length == 2)
+                {
+                    account = m_userAccountService.GetUserAccount(UUID.Zero, name[0], name[1]);
+                    return (account != null);
+                }
+            }
+
+            account = null;
+            return false;
+        }
+    }
+}
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