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#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Net;
using MediaBrowser.Controller.Security;
using MediaBrowser.Model.Services;
using Microsoft.Net.Http.Headers;
namespace Emby.Server.Implementations.HttpServer.Security
{
public class AuthorizationContext : IAuthorizationContext
{
private readonly IAuthenticationRepository _authRepo;
private readonly IUserManager _userManager;
public AuthorizationContext(IAuthenticationRepository authRepo, IUserManager userManager)
{
_authRepo = authRepo;
_userManager = userManager;
}
public AuthorizationInfo GetAuthorizationInfo(object requestContext)
{
return GetAuthorizationInfo((IRequest)requestContext);
}
public AuthorizationInfo GetAuthorizationInfo(IRequest requestContext)
{
if (requestContext.Items.TryGetValue("AuthorizationInfo", out var cached))
{
return (AuthorizationInfo)cached;
}
return GetAuthorization(requestContext);
}
/// <summary>
/// Gets the authorization.
/// </summary>
/// <param name="httpReq">The HTTP req.</param>
/// <returns>Dictionary{System.StringSystem.String}.</returns>
private AuthorizationInfo GetAuthorization(IRequest httpReq)
{
var auth = GetAuthorizationDictionary(httpReq);
string deviceId = null;
string device = null;
string client = null;
string version = null;
string token = null;
if (auth != null)
{
auth.TryGetValue("DeviceId", out deviceId);
auth.TryGetValue("Device", out device);
auth.TryGetValue("Client", out client);
auth.TryGetValue("Version", out version);
auth.TryGetValue("Token", out token);
}
if (string.IsNullOrEmpty(token))
{
token = httpReq.Headers["X-Emby-Token"];
}
if (string.IsNullOrEmpty(token))
{
token = httpReq.Headers["X-MediaBrowser-Token"];
}
if (string.IsNullOrEmpty(token))
{
token = httpReq.QueryString["api_key"];
}
var info = new AuthorizationInfo
{
Client = client,
Device = device,
DeviceId = deviceId,
Version = version,
Token = token
};
if (!string.IsNullOrWhiteSpace(token))
{
var result = _authRepo.Get(new AuthenticationInfoQuery
{
AccessToken = token
});
var tokenInfo = result.Items.Count > 0 ? result.Items[0] : null;
if (tokenInfo != null)
{
var updateToken = false;
// TODO: Remove these checks for IsNullOrWhiteSpace
if (string.IsNullOrWhiteSpace(info.Client))
{
info.Client = tokenInfo.AppName;
}
if (string.IsNullOrWhiteSpace(info.DeviceId))
{
info.DeviceId = tokenInfo.DeviceId;
}
// Temporary. TODO - allow clients to specify that the token has been shared with a casting device
var allowTokenInfoUpdate = info.Client == null || info.Client.IndexOf("chromecast", StringComparison.OrdinalIgnoreCase) == -1;
if (string.IsNullOrWhiteSpace(info.Device))
{
info.Device = tokenInfo.DeviceName;
}
else if (!string.Equals(info.Device, tokenInfo.DeviceName, StringComparison.OrdinalIgnoreCase))
{
if (allowTokenInfoUpdate)
{
updateToken = true;
tokenInfo.DeviceName = info.Device;
}
}
if (string.IsNullOrWhiteSpace(info.Version))
{
info.Version = tokenInfo.AppVersion;
}
else if (!string.Equals(info.Version, tokenInfo.AppVersion, StringComparison.OrdinalIgnoreCase))
{
if (allowTokenInfoUpdate)
{
updateToken = true;
tokenInfo.AppVersion = info.Version;
}
}
if ((DateTime.UtcNow - tokenInfo.DateLastActivity).TotalMinutes > 3)
{
tokenInfo.DateLastActivity = DateTime.UtcNow;
updateToken = true;
}
if (!tokenInfo.UserId.Equals(Guid.Empty))
{
info.User = _userManager.GetUserById(tokenInfo.UserId);
if (info.User != null && !string.Equals(info.User.Name, tokenInfo.UserName, StringComparison.OrdinalIgnoreCase))
{
tokenInfo.UserName = info.User.Name;
updateToken = true;
}
}
if (updateToken)
{
_authRepo.Update(tokenInfo);
}
}
httpReq.Items["OriginalAuthenticationInfo"] = tokenInfo;
}
httpReq.Items["AuthorizationInfo"] = info;
return info;
}
/// <summary>
/// Gets the auth.
/// </summary>
/// <param name="httpReq">The HTTP req.</param>
/// <returns>Dictionary{System.StringSystem.String}.</returns>
private Dictionary<string, string> GetAuthorizationDictionary(IRequest httpReq)
{
var auth = httpReq.Headers["X-Emby-Authorization"];
if (string.IsNullOrEmpty(auth))
{
auth = httpReq.Headers[HeaderNames.Authorization];
}
return GetAuthorization(auth);
}
/// <summary>
/// Gets the authorization.
/// </summary>
/// <param name="authorizationHeader">The authorization header.</param>
/// <returns>Dictionary{System.StringSystem.String}.</returns>
private Dictionary<string, string> GetAuthorization(string authorizationHeader)
{
if (authorizationHeader == null)
{
return null;
}
var parts = authorizationHeader.Split(new[] { ' ' }, 2);
// There should be at least to parts
if (parts.Length != 2)
{
return null;
}
var acceptedNames = new[] { "MediaBrowser", "Emby" };
// It has to be a digest request
if (!acceptedNames.Contains(parts[0], StringComparer.OrdinalIgnoreCase))
{
return null;
}
// Remove uptil the first space
authorizationHeader = parts[1];
parts = authorizationHeader.Split(',');
var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
foreach (var item in parts)
{
var param = item.Trim().Split(new[] { '=' }, 2);
if (param.Length == 2)
{
var value = NormalizeValue(param[1].Trim(new[] { '"' }));
result.Add(param[0], value);
}
}
return result;
}
private static string NormalizeValue(string value)
{
if (string.IsNullOrEmpty(value))
{
return value;
}
return WebUtility.HtmlEncode(value);
}
}
}
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