/
jwt.go
69 lines (53 loc) · 1.3 KB
/
jwt.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
67
68
69
package utils
import (
"errors"
"time"
"github.com/dgrijalva/jwt-go"
"github.com/vtv-us/kahoot-backend/internal/entities"
)
type JwtWrapper struct {
SecretKey string
Issuer string
}
type jwtClaims struct {
jwt.StandardClaims
UserID string
Email string
}
func (w *JwtWrapper) GenerateToken(user entities.User, expirationHours int32) (signedToken string, err error) {
expiredAt := time.Now().Local().Add(time.Hour * time.Duration(expirationHours)).Unix()
claims := &jwtClaims{
UserID: user.UserID,
Email: user.Email,
StandardClaims: jwt.StandardClaims{
ExpiresAt: expiredAt,
Issuer: w.Issuer,
},
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
signedToken, err = token.SignedString([]byte(w.SecretKey))
if err != nil {
return "", err
}
return signedToken, nil
}
func (w *JwtWrapper) ValidateToken(signedToken string) (claims *jwtClaims, err error) {
token, err := jwt.ParseWithClaims(
signedToken,
&jwtClaims{},
func(token *jwt.Token) (interface{}, error) {
return []byte(w.SecretKey), nil
},
)
if err != nil {
return
}
claims, ok := token.Claims.(*jwtClaims)
if !ok {
return nil, errors.New("couldn't parse claims")
}
if claims.ExpiresAt < time.Now().Local().Unix() {
return nil, errors.New("JWT is expired")
}
return claims, nil
}