file dl auth

src/Yavsc/AuthorizationHandlers/ViewFileHandler.cs

@@ -1,18 +1,30 @@
 using Microsoft.AspNet.Authorization;
+using Yavsc.Services;
 using Yavsc.ViewModels.Auth;
 
-namespace Yavsc.AuthorizationHandlers
-{
-    public class ViewFileHandler : AuthorizationHandler<ViewRequirement, ViewFileContext>
-    {
-        protected override void Handle(AuthorizationContext context, ViewRequirement requirement,  ViewFileContext fileContext)
-        {
+namespace Yavsc.AuthorizationHandlers {
+
+    public class ViewFileHandler : AuthorizationHandler<ViewRequirement, ViewFileContext> {
+
+        IFileSystemAuthManager _authManager;
+
+        public ViewFileHandler (IFileSystemAuthManager authManager) {
+            _authManager = authManager;
+        }
+
+        protected override void Handle (AuthorizationContext context, ViewRequirement requirement, ViewFileContext fileContext) {
             // TODO file access rules
             if (fileContext.Path.StartsWith ("/pub/"))
                 context.Succeed (requirement);
             else {
-                // TODO use "/blog/{num}/" path to link to blog access list
+                if (!fileContext.Path.StartsWith ("/"))
+                    context.Fail ();
+                else {
+                    var rights = _authManager.GetFilePathAccess (context.User, fileContext.Path.Substring (1));
+                    if ((rights & FileAccessRight.Read) > 0)
                         context.Succeed (requirement);
+                    else context.Fail ();
+                }
             }
         }
     }

src/Yavsc/Services/FileSystemAuthManager.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Linq;
+using System.Security.Principal;
+using System.Security.Claims;
+using Yavsc.Models;
+
+namespace Yavsc.Services
+{
+    public class FileSystemAuthManager : IFileSystemAuthManager
+    {
+        ApplicationDbContext _dbContext;
+
+        public FileSystemAuthManager(ApplicationDbContext dbContext)
+        {
+            _dbContext = dbContext;
+        }
+
+        public FileAccessRight GetFilePathAccess(ClaimsPrincipal user, string normalizedFullPath)
+        {
+            // Assert (normalizedFullPath!=null)
+            var parts = normalizedFullPath.Split('/');
+            if (parts.Length<2) return FileAccessRight.None;
+            var funame = parts[0];
+            if (funame == user.GetUserName()) return FileAccessRight.Read | FileAccessRight.Write;
+
+            var ucl = user.Claims.Where(c => c.Type == YavscClaimTypes.CircleMembership).Select(c => long.Parse(c.Value)).ToArray();
+
+            if (_dbContext.CircleAuthorizationToFile.Any(
+                r => r.FullPath == normalizedFullPath && ucl.Contains(r.CircleId)
+            )) return FileAccessRight.Read;
+            return FileAccessRight.None;
+        }
+
+        public string NormalizePath(string path)
+        {
+            throw new NotImplementedException();
+        }
+
+        public void SetAccess(long circleId, string normalizedFullPath, FileAccessRight access)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

src/Yavsc/Services/IFileSystemAuthManager.cs

@@ -1,8 +1,9 @@
 using System;
+using System.Security.Claims;
 using System.Security.Principal;
-using Yavsc.Models;
 
-namespace Yavsc.Services {
+namespace Yavsc.Services
+{
     [Flags]
     public enum FileAccessRight {
         None = 0,
@@ -22,34 +23,9 @@ namespace Yavsc.Services {
         /// <param name="user"></param>
         /// <param name="normalizedFullPath"></param>
         /// <returns></returns>
-        FileAccessRight GetFilePathAccess(IPrincipal user, string normalizedFullPath);
+        FileAccessRight GetFilePathAccess(ClaimsPrincipal user, string normalizedFullPath);
 
         void SetAccess (long circleId, string normalizedFullPath, FileAccessRight access);
 
     }
-
-    public class FileSystemAuthManager : IFileSystemAuthManager
-    {
-        ApplicationDbContext _dbContext;
-
-        public FileSystemAuthManager(ApplicationDbContext dbContext)
-        {
-            _dbContext = dbContext;
-        }
-
-        public FileAccessRight GetFilePathAccess(IPrincipal user, string normalizedFullPath)
-        {
-            throw new NotImplementedException();
-        }
-
-        public string NormalizePath(string path)
-        {
-            throw new NotImplementedException();
-        }
-
-        public void SetAccess(long circleId, string normalizedFullPath, FileAccessRight access)
-        {
-            throw new NotImplementedException();
-        }
-    }
 }

src/Yavsc/Startup/Startup.FileServer.cs

@@ -1,4 +1,5 @@
 using System.IO;
+using System.Security.Claims;
 using Microsoft.AspNet.Authorization;
 using Microsoft.AspNet.Builder;
 using Microsoft.AspNet.FileProviders;
@@ -7,6 +8,8 @@ using Microsoft.AspNet.Http;
 using Microsoft.AspNet.StaticFiles;
 using Microsoft.Extensions.Logging;
 using Yavsc.Abstract.FileSystem;
+using Yavsc.Services;
+using Yavsc.ViewModels.Auth;
 
 namespace Yavsc
 {
@@ -17,7 +20,8 @@ namespace Yavsc
 
         public static FileServerOptions AvatarsOptions { get; set; }
         public void ConfigureFileServerApp(IApplicationBuilder app,
-                SiteSettings siteSettings, IHostingEnvironment env, IAuthorizationService authorizationService)
+                SiteSettings siteSettings, IHostingEnvironment env,
+                 IAuthorizationService authorizationService)
         {
             var userFilesDirInfo = new DirectoryInfo( siteSettings.Blog );
             AbstractFileSystemHelpers.UserFilesDirName =  userFilesDirInfo.FullName;
@@ -33,15 +37,18 @@ namespace Yavsc
             UserFilesOptions.EnableDefaultFiles=true;
             UserFilesOptions.StaticFileOptions.ServeUnknownFileTypes=true;
 
-            /* TODO needs a better design, at implementation time (don't use database, but in memory data) 
+            /* TODO needs a better design, at implementation time (don't use database, but in memory data) */
              UserFilesOptions.StaticFileOptions.OnPrepareResponse += async context =>
              {
                  var uname = context.Context.User.GetUserName();
                  var path = context.Context.Request.Path;
                  var result = await authorizationService.AuthorizeAsync(context.Context.User, new ViewFileContext
                  { UserName = uname, File = context.File, Path = path } , new ViewRequirement());
+                 if (!result) {
+                     context.Context.Response.StatusCode = 403;
+                     context.Context.Abort();
+                 }
              };
-             */
             var avatarsDirInfo = new DirectoryInfo(Startup.SiteSetup.Avatars);
             if (!avatarsDirInfo.Exists) avatarsDirInfo.Create();
             AvatarsDirName = avatarsDirInfo.FullName;

src/Yavsc/Startup/Startup.cs

@@ -232,6 +232,7 @@ namespace Yavsc
             services.AddSingleton<IAuthorizationHandler, SendMessageHandler>();
             services.AddSingleton<IConnexionManager, HubConnectionManager>();
             services.AddSingleton<ILiveProcessor, LiveProcessor>();
+            services.AddSingleton<IFileSystemAuthManager, FileSystemAuthManager>();
 
             services.AddMvc(config =>
             {