blob: bd1233ec466a355f26bd8c9d797437a2e0fab399 (
plain)
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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright (c) 2022 Vaughn Nugent
*
* Library: VNLib
* Package: ObjectCacheServer
* File: BrokerHeartBeat.cs
*
* BrokerHeartBeat.cs is part of ObjectCacheServer which is part of the larger
* VNLib collection of libraries and utilities.
*
* ObjectCacheServer is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* ObjectCacheServer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System;
using System.Net;
using System.Linq;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using System.Collections.Generic;
using VNLib.Hashing.IdentityUtility;
using VNLib.Plugins.Essentials.Endpoints;
using VNLib.Plugins.Essentials.Extensions;
using VNLib.Plugins.Extensions.Loading;
namespace VNLib.Plugins.Essentials.Sessions.Server.Endpoints
{
internal sealed class BrokerHeartBeat : ResourceEndpointBase
{
public override string Path => "/heartbeat";
private readonly Func<string> Token;
private readonly ManualResetEvent KeepaliveSet;
private readonly Task<IPAddress[]> BrokerIpList;
private readonly PluginBase Pbase;
protected override ProtectionSettings EndpointProtectionSettings { get; } = new()
{
DisableBrowsersOnly = true,
DisableSessionsRequired = true,
DisableVerifySessionCors = true
};
public BrokerHeartBeat(Func<string> token, ManualResetEvent keepaliveSet, Uri brokerUri, PluginBase pbase)
{
Token = token;
KeepaliveSet = keepaliveSet;
BrokerIpList = Dns.GetHostAddressesAsync(brokerUri.DnsSafeHost);
this.Pbase = pbase;
}
private async Task<ReadOnlyJsonWebKey> GetBrokerPubAsync()
{
return await Pbase.TryGetSecretAsync("broker_public_key").ToJsonWebKey() ?? throw new KeyNotFoundException("Missing required secret : broker_public_key");
}
protected override async ValueTask<VfReturnType> GetAsync(HttpEntity entity)
{
//If-not loopback then verify server address
if (!entity.Server.IsLoopBack())
{
//Load and verify the broker's ip address matches with an address we have stored
IPAddress[] addresses = await BrokerIpList;
if (!addresses.Contains(entity.TrustedRemoteIp))
{
//Token invalid
entity.CloseResponse(HttpStatusCode.Forbidden);
return VfReturnType.VirtualSkip;
}
}
//Get the authorization jwt
string? jwtAuth = entity.Server.Headers[HttpRequestHeader.Authorization];
if (string.IsNullOrWhiteSpace(jwtAuth))
{
//Token invalid
entity.CloseResponse(HttpStatusCode.Forbidden);
return VfReturnType.VirtualSkip;
}
//Parse the jwt
using JsonWebToken jwt = JsonWebToken.Parse(jwtAuth);
//Verify the jwt using the broker's public key certificate
using (ReadOnlyJsonWebKey cert = await GetBrokerPubAsync())
{
//Verify the jwt
if (!jwt.VerifyFromJwk(cert))
{
//Token invalid
entity.CloseResponse(HttpStatusCode.Forbidden);
return VfReturnType.VirtualSkip;
}
}
string? auth;
//Recover the auth token from the jwt
using (JsonDocument doc = jwt.GetPayload())
{
auth = doc.RootElement.GetProperty("token").GetString();
}
//Verify token
if(Token().Equals(auth, StringComparison.Ordinal))
{
//Signal keepalive
KeepaliveSet.Set();
entity.CloseResponse(HttpStatusCode.OK);
return VfReturnType.VirtualSkip;
}
//Token invalid
entity.CloseResponse(HttpStatusCode.Forbidden);
return VfReturnType.VirtualSkip;
}
}
}
|
