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
|
/* OpenBills-server - Server for libre billing software OpenBills-web
* Copyright (C) 2022 Vidhu Kant Sharma <vidhukant@vidhukant.xyz>
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package auth
import (
"context"
"github.com/MikunoNaka/OpenBills-server/database"
"github.com/MikunoNaka/OpenBills-server/user"
"github.com/MikunoNaka/OpenBills-server/util"
"github.com/gin-gonic/gin"
"github.com/golang-jwt/jwt/v4"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
"net/http"
"time"
)
var db *mongo.Collection = database.DB.Collection("Users")
var (
refreshSecret []byte
)
func init() {
conf := util.GetConfig().Crypto
refreshSecret = []byte(conf.RefreshTokenSecret)
}
// middleware to check refresh token
func verifyRefreshToken() gin.HandlerFunc {
return func(ctx *gin.Context) {
refreshToken, err := ctx.Cookie("refreshToken")
if err == nil {
token, err := jwt.ParseWithClaims(refreshToken, &jwt.StandardClaims{}, func(token *jwt.Token) (interface{}, error) {
return []byte(refreshSecret), nil
})
if err != nil { // invalid token
ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "invalid token"})
} else { // valid token
// convert id from string to ObjectID
id, _ := primitive.ObjectIDFromHex(token.Claims.(*jwt.StandardClaims).Issuer)
// check if user exists
var u user.User
if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil {
ctx.AbortWithStatusJSON(http.StatusNotFound, gin.H{"message": "user not found"})
} else {
// check if this refreshToken is in DB
for _, i := range u.Sessions {
if i.Token == refreshToken {
ctx.Set("user", u)
ctx.Next()
return
}
}
ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "refresh token expired"})
}
}
} else {
// invalid Authorization header
ctx.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"message": "not logged in"})
}
}
}
/*
* the refresh token has a long lifespan and is stored in
* the database in case it needs to be revoked.
*
* this can be stored as an HTTP only cookie and will be used
* when creating a new access token
*
* I'm using a different secret key for refresh tokens
* for enhanced security
*/
func newRefreshToken(userId string) (string, int64, error) {
// convert id from string to ObjectID
id, _ := primitive.ObjectIDFromHex(userId)
// check if user exists
var u user.User
if err := db.FindOne(context.TODO(), bson.M{"_id": id}).Decode(&u); err != nil {
return "", 0, user.ErrUserNotFound
}
// generate refresh token
expiresAt := time.Now().Add(time.Hour * 12).Unix()
claims := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.StandardClaims{
Issuer: userId,
ExpiresAt: expiresAt,
})
token, err := claims.SignedString(refreshSecret)
if err != nil {
return "", expiresAt, err
}
// store refresh token in db with unique session name for ease in identification
sessionName := time.Now().Format("01-02-2006.15:04:05") + "-" + u.UserName
u.Sessions = append(u.Sessions, user.Session{Name: sessionName, Token: token})
db.UpdateOne(context.TODO(), bson.M{"_id": id}, bson.D{{"$set", u}})
return token, expiresAt, nil
}
|
