1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
using System.Net.Http.Headers;
using System.Text.Json;
using LibMatrix;
using LibMatrix.Homeservers;
using LibMatrix.Services;
using ModAS.Server.Attributes;
using MxApiExtensions.Services;
namespace ModAS.Server.Authentication;
public class AuthMiddleware(RequestDelegate next, ILogger<AuthMiddleware> logger, ModASConfiguration config, HomeserverProviderService hsProvider, AppServiceRegistration asr) {
public async Task InvokeAsync(HttpContext context) {
context.Request.Query.TryGetValue("access_token", out var queryAccessToken);
var accessToken = queryAccessToken.FirstOrDefault();
accessToken ??= context.Request.GetTypedHeaders().Get<AuthenticationHeaderValue>("Authorization")?.Parameter;
//get UserAuth custom attribute
var endpoint = context.GetEndpoint();
if (endpoint is null) {
Console.WriteLine($"Ignoring authentication, endpoint is null!");
await next(context);
return;
}
var authAttribute = endpoint?.Metadata.GetMetadata<UserAuthAttribute>();
if (authAttribute is not null)
logger.LogInformation($"{nameof(Route)} authorization: {authAttribute.ToJson()}");
else if (string.IsNullOrWhiteSpace(accessToken)) {
// auth is optional if auth attribute isnt set
Console.WriteLine($"Allowing unauthenticated request, AuthAttribute is not set!");
await next(context);
return;
}
if (string.IsNullOrWhiteSpace(accessToken))
if (authAttribute is not null) {
context.Response.StatusCode = 401;
await context.Response.WriteAsJsonAsync(new MatrixException() {
ErrorCode = "M_UNAUTHORIZED",
Error = "Missing access token"
}.GetAsObject());
return;
}
try {
switch (authAttribute.AuthType) {
case AuthType.User:
var authUser = await GetAuthUser(accessToken);
context.Items.Add("AuthUser", authUser);
break;
case AuthType.Server:
if (asr.HomeserverToken != accessToken)
throw new MatrixException() {
ErrorCode = "M_UNAUTHORIZED",
Error = "Invalid access token"
};
break;
default:
throw new ArgumentOutOfRangeException();
}
}
catch (MatrixException e) {
context.Response.StatusCode = 401;
await context.Response.WriteAsJsonAsync(e.GetAsObject());
return;
}
await next(context);
}
private async Task<AuthUser> GetAuthUser(string accessToken) {
AuthenticatedHomeserverGeneric? homeserver;
homeserver = await hsProvider.GetAuthenticatedWithToken(config.ServerName, accessToken, config.HomeserverUrl);
return new AuthUser() {
Homeserver = homeserver,
AccessToken = accessToken,
Roles = config.Roles.Where(r => r.Value.Contains(homeserver.WhoAmI.UserId)).Select(r => r.Key).ToList()
};
}
}
|
