jellyfin/Emby.Server.Implementations/HttpServer/Security/AuthService.cs

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