blob: 4713d7db99dc8c15ab5e2efe8d318eb6f5127f2d (
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
|
;; webid-oidc, implementation of the Solid specification
;; Copyright (C) 2020, 2021 Vivien Kraus
;; This program 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.
;; This program 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/>.
(define-module (webid-oidc jti)
#:use-module (ice-9 atomic)
#:use-module (ice-9 threads)
#:use-module (srfi srfi-19))
(define-public (make-jti-list)
(make-atomic-box '()))
(define-public (lookup list jti)
(if (null? list)
#f
(or (string=? (assq-ref (car list) 'jti) jti)
(lookup (cdr list) jti))))
(define-public (jti-check current-time jti list valid-time)
(when (date? current-time)
(set! current-time (date->time-utc current-time)))
(when (time? current-time)
(set! current-time (time-second current-time)))
(let* ((old (atomic-box-ref list))
(new-entry `((exp . ,(+ current-time valid-time))
(jti . ,jti)))
(new (filter
(lambda (entry)
(let ((exp (assq-ref entry 'exp)))
(>= exp current-time)))
(cons new-entry old))))
(let ((present? (lookup old jti)))
(if present?
#f
(let ((discarded (atomic-box-compare-and-swap! list old new)))
(if (eq? discarded old)
#t
(jti-check current-time jti list valid-time)))))))
|
