mirror of
https://github.com/jellyfin/jellyfin.git
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292 lines
9.8 KiB
C#
292 lines
9.8 KiB
C#
#pragma warning disable CS1591
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using MediaBrowser.Controller.Library;
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using MediaBrowser.Controller.Net;
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using MediaBrowser.Controller.Security;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Net.Http.Headers;
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namespace Emby.Server.Implementations.HttpServer.Security
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{
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public class AuthorizationContext : IAuthorizationContext
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{
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private readonly IAuthenticationRepository _authRepo;
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private readonly IUserManager _userManager;
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public AuthorizationContext(IAuthenticationRepository authRepo, IUserManager userManager)
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{
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_authRepo = authRepo;
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_userManager = userManager;
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}
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public AuthorizationInfo GetAuthorizationInfo(HttpContext requestContext)
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{
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if (requestContext.Request.HttpContext.Items.TryGetValue("AuthorizationInfo", out var cached))
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{
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return (AuthorizationInfo)cached;
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}
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return GetAuthorization(requestContext);
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}
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public AuthorizationInfo GetAuthorizationInfo(HttpRequest requestContext)
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{
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var auth = GetAuthorizationDictionary(requestContext);
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var authInfo = GetAuthorizationInfoFromDictionary(auth, requestContext.Headers, requestContext.Query);
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return authInfo;
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}
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/// <summary>
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/// Gets the authorization.
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/// </summary>
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/// <param name="httpReq">The HTTP req.</param>
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/// <returns>Dictionary{System.StringSystem.String}.</returns>
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private AuthorizationInfo GetAuthorization(HttpContext httpReq)
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{
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var auth = GetAuthorizationDictionary(httpReq);
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var authInfo = GetAuthorizationInfoFromDictionary(auth, httpReq.Request.Headers, httpReq.Request.Query);
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httpReq.Request.HttpContext.Items["AuthorizationInfo"] = authInfo;
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return authInfo;
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}
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private AuthorizationInfo GetAuthorizationInfoFromDictionary(
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in Dictionary<string, string> auth,
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in IHeaderDictionary headers,
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in IQueryCollection queryString)
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{
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string deviceId = null;
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string device = null;
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string client = null;
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string version = null;
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string token = null;
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if (auth != null)
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{
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auth.TryGetValue("DeviceId", out deviceId);
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auth.TryGetValue("Device", out device);
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auth.TryGetValue("Client", out client);
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auth.TryGetValue("Version", out version);
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auth.TryGetValue("Token", out token);
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}
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if (string.IsNullOrEmpty(token))
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{
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token = headers["X-Emby-Token"];
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}
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if (string.IsNullOrEmpty(token))
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{
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token = headers["X-MediaBrowser-Token"];
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}
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if (string.IsNullOrEmpty(token))
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{
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token = queryString["ApiKey"];
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}
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// TODO deprecate this query parameter.
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if (string.IsNullOrEmpty(token))
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{
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token = queryString["api_key"];
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}
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var authInfo = new AuthorizationInfo
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{
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Client = client,
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Device = device,
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DeviceId = deviceId,
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Version = version,
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Token = token,
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IsAuthenticated = false,
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HasToken = false
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};
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if (string.IsNullOrWhiteSpace(token))
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{
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// Request doesn't contain a token.
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return authInfo;
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}
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authInfo.HasToken = true;
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var result = _authRepo.Get(new AuthenticationInfoQuery
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{
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AccessToken = token
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});
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if (result.Items.Count > 0)
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{
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authInfo.IsAuthenticated = true;
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}
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var originalAuthenticationInfo = result.Items.Count > 0 ? result.Items[0] : null;
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if (originalAuthenticationInfo != null)
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{
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var updateToken = false;
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// TODO: Remove these checks for IsNullOrWhiteSpace
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if (string.IsNullOrWhiteSpace(authInfo.Client))
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{
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authInfo.Client = originalAuthenticationInfo.AppName;
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}
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if (string.IsNullOrWhiteSpace(authInfo.DeviceId))
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{
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authInfo.DeviceId = originalAuthenticationInfo.DeviceId;
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}
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// Temporary. TODO - allow clients to specify that the token has been shared with a casting device
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var allowTokenInfoUpdate = authInfo.Client == null || authInfo.Client.IndexOf("chromecast", StringComparison.OrdinalIgnoreCase) == -1;
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if (string.IsNullOrWhiteSpace(authInfo.Device))
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{
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authInfo.Device = originalAuthenticationInfo.DeviceName;
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}
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else if (!string.Equals(authInfo.Device, originalAuthenticationInfo.DeviceName, StringComparison.OrdinalIgnoreCase))
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{
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if (allowTokenInfoUpdate)
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{
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updateToken = true;
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originalAuthenticationInfo.DeviceName = authInfo.Device;
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}
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}
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if (string.IsNullOrWhiteSpace(authInfo.Version))
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{
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authInfo.Version = originalAuthenticationInfo.AppVersion;
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}
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else if (!string.Equals(authInfo.Version, originalAuthenticationInfo.AppVersion, StringComparison.OrdinalIgnoreCase))
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{
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if (allowTokenInfoUpdate)
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{
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updateToken = true;
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originalAuthenticationInfo.AppVersion = authInfo.Version;
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}
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}
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if ((DateTime.UtcNow - originalAuthenticationInfo.DateLastActivity).TotalMinutes > 3)
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{
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originalAuthenticationInfo.DateLastActivity = DateTime.UtcNow;
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updateToken = true;
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}
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if (!originalAuthenticationInfo.UserId.Equals(Guid.Empty))
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{
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authInfo.User = _userManager.GetUserById(originalAuthenticationInfo.UserId);
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if (authInfo.User != null && !string.Equals(authInfo.User.Username, originalAuthenticationInfo.UserName, StringComparison.OrdinalIgnoreCase))
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{
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originalAuthenticationInfo.UserName = authInfo.User.Username;
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updateToken = true;
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}
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authInfo.IsApiKey = false;
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}
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else
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{
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authInfo.IsApiKey = true;
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}
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if (updateToken)
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{
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_authRepo.Update(originalAuthenticationInfo);
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}
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}
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return authInfo;
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}
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/// <summary>
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/// Gets the auth.
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/// </summary>
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/// <param name="httpReq">The HTTP req.</param>
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/// <returns>Dictionary{System.StringSystem.String}.</returns>
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private Dictionary<string, string> GetAuthorizationDictionary(HttpContext httpReq)
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{
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var auth = httpReq.Request.Headers["X-Emby-Authorization"];
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if (string.IsNullOrEmpty(auth))
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{
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auth = httpReq.Request.Headers[HeaderNames.Authorization];
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}
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return GetAuthorization(auth);
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}
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/// <summary>
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/// Gets the auth.
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/// </summary>
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/// <param name="httpReq">The HTTP req.</param>
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/// <returns>Dictionary{System.StringSystem.String}.</returns>
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private Dictionary<string, string> GetAuthorizationDictionary(HttpRequest httpReq)
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{
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var auth = httpReq.Headers["X-Emby-Authorization"];
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if (string.IsNullOrEmpty(auth))
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{
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auth = httpReq.Headers[HeaderNames.Authorization];
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}
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return GetAuthorization(auth);
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}
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/// <summary>
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/// Gets the authorization.
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/// </summary>
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/// <param name="authorizationHeader">The authorization header.</param>
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/// <returns>Dictionary{System.StringSystem.String}.</returns>
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private Dictionary<string, string> GetAuthorization(string authorizationHeader)
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{
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if (authorizationHeader == null)
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{
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return null;
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}
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var parts = authorizationHeader.Split(' ', 2);
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// There should be at least to parts
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if (parts.Length != 2)
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{
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return null;
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}
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var acceptedNames = new[] { "MediaBrowser", "Emby" };
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// It has to be a digest request
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if (!acceptedNames.Contains(parts[0], StringComparer.OrdinalIgnoreCase))
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{
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return null;
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}
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// Remove uptil the first space
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authorizationHeader = parts[1];
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parts = authorizationHeader.Split(',');
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var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
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foreach (var item in parts)
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{
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var param = item.Trim().Split('=', 2);
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if (param.Length == 2)
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{
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var value = NormalizeValue(param[1].Trim('"'));
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result[param[0]] = value;
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}
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}
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return result;
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}
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private static string NormalizeValue(string value)
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{
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return string.IsNullOrEmpty(value) ? value : WebUtility.HtmlEncode(value);
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}
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}
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}
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