-
Notifications
You must be signed in to change notification settings - Fork 18
/
csrf.go
66 lines (60 loc) · 1.86 KB
/
csrf.go
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
/***************************************************************
*
* Copyright (C) 2024, Pelican Project, Morgridge Institute for Research
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
***************************************************************/
package config
import (
"net/http"
"sync"
"github.com/gin-gonic/gin"
"github.com/gorilla/csrf"
adapter "github.com/gwatts/gin-adapter"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
)
var (
// Global CSRF handler that shares the same auth key
csrfHanlder gin.HandlerFunc
onceCSRFHanlder sync.Once
)
func setupCSRFHandler() {
csrfKey, err := LoadSessionSecret()
if err != nil {
log.Error("Error loading session secret, abort setting up CSRF handler:", err)
return
}
CSRF := csrf.Protect(csrfKey,
csrf.SameSite(csrf.SameSiteStrictMode),
csrf.Path("/"),
csrf.ErrorHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusForbidden)
_, err := w.Write([]byte(`{"message": "CSRF token invalid"}`))
if err != nil {
log.Error("Error writing error message back as response")
}
})),
)
csrfHanlder = adapter.Wrap(CSRF)
}
func GetCSRFHandler() (gin.HandlerFunc, error) {
onceCSRFHanlder.Do(func() {
setupCSRFHandler()
})
if csrfHanlder == nil {
return nil, errors.New("Error setting up the CSRF handler")
}
return csrfHanlder, nil
}