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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
* Copyright (c) 2024 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Essentials.Sessions.OAuth
* File: AccessTokenEndpoint.cs
*
* AccessTokenEndpoint.cs is part of VNLib.Plugins.Essentials.Sessions.OAuth which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Essentials.Sessions.OAuth 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.
*
* VNLib.Plugins.Essentials.Sessions.OAuth 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.Threading.Tasks;
using VNLib.Utils.Memory;
using VNLib.Plugins.Essentials;
using VNLib.Plugins.Essentials.Oauth;
using VNLib.Plugins.Essentials.Endpoints;
using VNLib.Plugins.Essentials.Oauth.Tokens;
using VNLib.Plugins.Essentials.Oauth.Applications;
using VNLib.Plugins.Essentials.Extensions;
using VNLib.Plugins.Extensions.Loading;
using VNLib.Plugins.Extensions.Loading.Sql;
using VNLib.Plugins.Extensions.Validation;
namespace VNLib.Plugins.Sessions.OAuth.Endpoints
{
/// <summary>
/// Grants authorization to OAuth2 clients to protected resources
/// with access tokens
/// </summary>
internal sealed class AccessTokenEndpoint : ResourceEndpointBase
{
private readonly IApplicationTokenFactory TokenFactory;
private readonly ApplicationStore Applications;
//override protection settings to allow most connections to authenticate
///<inheritdoc/>
protected override ProtectionSettings EndpointProtectionSettings { get; } = new()
{
DisableSessionsRequired = true
};
public AccessTokenEndpoint(PluginBase pbase, IConfigScope config, IApplicationTokenFactory tokenFactory)
{
string? path = config.GetRequiredProperty("token_path", p => p.GetString()!);
InitPathAndLog(path, pbase.Log);
TokenFactory = tokenFactory;
Applications = new(pbase.GetContextOptions(), pbase.GetOrCreateSingleton<ManagedPasswordHashing>());
}
protected override async ValueTask<VfReturnType> PostAsync(HttpEntity entity)
{
//Check for refresh token
if (entity.RequestArgs.IsArgumentSet("grant_type", "refresh_token"))
{
//process a refresh token
}
//Check for grant_type parameter from the request body
else if (entity.RequestArgs.IsArgumentSet("grant_type", "client_credentials"))
{
//Get client id and secret (and make sure theyre not empty
if (entity.RequestArgs.TryGetNonEmptyValue("client_id", out string? clientId) &&
entity.RequestArgs.TryGetNonEmptyValue("client_secret", out string? secret))
{
if (!ValidatorExtensions.OnlyAlphaNumRegx.IsMatch(clientId))
{
//respond with error message
entity.CloseResponseError(HttpStatusCode.UnprocessableEntity, ErrorType.InvalidRequest, "Invalid client_id");
return VfReturnType.VirtualSkip;
}
if (!ValidatorExtensions.OnlyAlphaNumRegx.IsMatch(secret))
{
//respond with error message
entity.CloseResponseError(HttpStatusCode.UnprocessableEntity, ErrorType.InvalidRequest, "Invalid client_secret");
return VfReturnType.VirtualSkip;
}
//Convert the clientid and secret to lowercase
clientId = clientId.ToLower(null);
secret = secret.ToLower(null);
//Convert secret to private string that is unreferrenced
using PrivateString secretPv = PrivateString.ToPrivateString(secret, false)!;
//Get the application from apps store
UserApplication? app = await Applications.VerifyAppAsync(clientId, secretPv, entity.EventCancellation);
return await GenerateTokenAsync(entity, app);
}
}
//Default to bad request
entity.CloseResponseError(HttpStatusCode.BadRequest, ErrorType.InvalidClient, "Invalid grant type");
return VfReturnType.VirtualSkip;
}
private async Task<VfReturnType> GenerateTokenAsync(HttpEntity entity, UserApplication? app)
{
if (app is null)
{
//App was not found or the credentials do not match
entity.CloseResponseError(HttpStatusCode.UnprocessableEntity, ErrorType.InvalidClient, "The credentials are invalid or do not exist");
return VfReturnType.VirtualSkip;
}
IOAuth2TokenResult? result = await TokenFactory.CreateAccessTokenAsync(entity, app, entity.EventCancellation);
if (result is null)
{
entity.CloseResponseError(HttpStatusCode.TooManyRequests, ErrorType.TemporarilyUnavailable, "You have reached the maximum number of valid tokens for this application");
return VfReturnType.VirtualSkip;
}
//Create the new response message
OauthTokenResponseMessage tokenMessage = new()
{
AccessToken = result.AccessToken,
IdToken = result.IdentityToken,
//set expired as seconds in int form
Expires = result.ExpiresSeconds,
RefreshToken = result.RefreshToken,
TokenType = result.TokenType
};
//Respond with the token message
entity.CloseResponseJson(HttpStatusCode.OK, tokenMessage);
return VfReturnType.VirtualSkip;
}
}
}
|