jellyfin/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
2019-01-13 21:46:33 +01:00

240 lines
8.1 KiB
C#

using System;
using System.Linq;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Net;
using MediaBrowser.Controller.Security;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Services;
namespace Emby.Server.Implementations.HttpServer.Security
{
public class AuthService : IAuthService
{
private readonly IServerConfigurationManager _config;
public AuthService(IUserManager userManager, IAuthorizationContext authorizationContext, IServerConfigurationManager config, ISessionManager sessionManager, INetworkManager networkManager)
{
AuthorizationContext = authorizationContext;
_config = config;
SessionManager = sessionManager;
UserManager = userManager;
NetworkManager = networkManager;
}
public IUserManager UserManager { get; private set; }
public IAuthorizationContext AuthorizationContext { get; private set; }
public ISessionManager SessionManager { get; private set; }
public INetworkManager NetworkManager { get; private set; }
/// <summary>
/// Redirect the client to a specific URL if authentication failed.
/// If this property is null, simply `401 Unauthorized` is returned.
/// </summary>
public string HtmlRedirect { get; set; }
public void Authenticate(IRequest request, IAuthenticationAttributes authAttribtues)
{
ValidateUser(request, authAttribtues);
}
private void ValidateUser(IRequest request, IAuthenticationAttributes authAttribtues)
{
// This code is executed before the service
var auth = AuthorizationContext.GetAuthorizationInfo(request);
if (!IsExemptFromAuthenticationToken(auth, authAttribtues, request))
{
ValidateSecurityToken(request, auth.Token);
}
if (authAttribtues.AllowLocalOnly && !request.IsLocal)
{
throw new SecurityException("Operation not found.");
}
var user = auth.User;
if (user == null & !auth.UserId.Equals(Guid.Empty))
{
throw new SecurityException("User with Id " + auth.UserId + " not found");
}
if (user != null)
{
ValidateUserAccess(user, request, authAttribtues, auth);
}
var info = GetTokenInfo(request);
if (!IsExemptFromRoles(auth, authAttribtues, request, info))
{
var roles = authAttribtues.GetRoles();
ValidateRoles(roles, user);
}
if (!string.IsNullOrEmpty(auth.DeviceId) &&
!string.IsNullOrEmpty(auth.Client) &&
!string.IsNullOrEmpty(auth.Device))
{
SessionManager.LogSessionActivity(auth.Client,
auth.Version,
auth.DeviceId,
auth.Device,
request.RemoteIp,
user);
}
}
private void ValidateUserAccess(User user, IRequest request,
IAuthenticationAttributes authAttribtues,
AuthorizationInfo auth)
{
if (user.Policy.IsDisabled)
{
throw new SecurityException("User account has been disabled.")
{
SecurityExceptionType = SecurityExceptionType.Unauthenticated
};
}
if (!user.Policy.EnableRemoteAccess && !NetworkManager.IsInLocalNetwork(request.RemoteIp))
{
throw new SecurityException("User account has been disabled.")
{
SecurityExceptionType = SecurityExceptionType.Unauthenticated
};
}
if (!user.Policy.IsAdministrator &&
!authAttribtues.EscapeParentalControl &&
!user.IsParentalScheduleAllowed())
{
request.Response.AddHeader("X-Application-Error-Code", "ParentalControl");
throw new SecurityException("This user account is not allowed access at this time.")
{
SecurityExceptionType = SecurityExceptionType.ParentalControl
};
}
}
private bool IsExemptFromAuthenticationToken(AuthorizationInfo auth, IAuthenticationAttributes authAttribtues, IRequest request)
{
if (!_config.Configuration.IsStartupWizardCompleted && authAttribtues.AllowBeforeStartupWizard)
{
return true;
}
if (authAttribtues.AllowLocal && request.IsLocal)
{
return true;
}
if (authAttribtues.AllowLocalOnly && request.IsLocal)
{
return true;
}
return false;
}
private bool IsExemptFromRoles(AuthorizationInfo auth, IAuthenticationAttributes authAttribtues, IRequest request, AuthenticationInfo tokenInfo)
{
if (!_config.Configuration.IsStartupWizardCompleted && authAttribtues.AllowBeforeStartupWizard)
{
return true;
}
if (authAttribtues.AllowLocal && request.IsLocal)
{
return true;
}
if (authAttribtues.AllowLocalOnly && request.IsLocal)
{
return true;
}
if (string.IsNullOrEmpty(auth.Token))
{
return true;
}
if (tokenInfo != null && tokenInfo.UserId.Equals(Guid.Empty))
{
return true;
}
return false;
}
private static void ValidateRoles(string[] roles, User user)
{
if (roles.Contains("admin", StringComparer.OrdinalIgnoreCase))
{
if (user == null || !user.Policy.IsAdministrator)
{
throw new SecurityException("User does not have admin access.")
{
SecurityExceptionType = SecurityExceptionType.Unauthenticated
};
}
}
if (roles.Contains("delete", StringComparer.OrdinalIgnoreCase))
{
if (user == null || !user.Policy.EnableContentDeletion)
{
throw new SecurityException("User does not have delete access.")
{
SecurityExceptionType = SecurityExceptionType.Unauthenticated
};
}
}
if (roles.Contains("download", StringComparer.OrdinalIgnoreCase))
{
if (user == null || !user.Policy.EnableContentDownloading)
{
throw new SecurityException("User does not have download access.")
{
SecurityExceptionType = SecurityExceptionType.Unauthenticated
};
}
}
}
private static AuthenticationInfo GetTokenInfo(IRequest request)
{
request.Items.TryGetValue("OriginalAuthenticationInfo", out var info);
return info as AuthenticationInfo;
}
private void ValidateSecurityToken(IRequest request, string token)
{
if (string.IsNullOrEmpty(token))
{
throw new SecurityException("Access token is required.");
}
var info = GetTokenInfo(request);
if (info == null)
{
throw new SecurityException("Access token is invalid or expired.");
}
//if (!string.IsNullOrEmpty(info.UserId))
//{
// var user = _userManager.GetUserById(info.UserId);
// if (user == null || user.Configuration.IsDisabled)
// {
// throw new SecurityException("User account has been disabled.");
// }
//}
}
}
}