Golang jwt.StandardClaims time format type issue

Question

I am using this package github.com/dgrijalva/jwt-go/v4 to set up claims in a Login function:

now := time.Now()
claims := &jwt.StandardClaims{
    Issuer: "Test",
    ExpiresAt: now.Add(time.Hour * 24).Unix(),
}

The IDE keeps telling me:

Cannot use 'now.Add(time.Hour * 24).Unix()' (type int64) as the type Time.

I read that as I have the wrong typed value, however, on all the examples I've seen online, this is exactly how the majority set up this up.

I am still learning go and so I am not sure the proper way to convert this time format into something that is valid.

I've tried that. It then gives the same error but says Cannot use type Time as the type *Time. — porterhaus, Feb 14 '22 at 22:50
it works if you dont use v4. Looks like v4 introduced breaking changes. It is also a preview version. So no offical docs are there yet. — The Fool, Feb 14 '22 at 23:07
don't use `github.com/dgrijalva/jwt-go`, it has critical security issues — blackgreen, Feb 15 '22 at 06:35

Jay · Answer 1 · 2022-07-17T14:16:00.177

3

In github.com/golang-jwt/jwt/v4 StandardClaims type is deprecated, you should replace StandardClaims with RegisteredClaims.

And about Cannot use 'now.Add(time.Hour * 24).Unix()' (type int64) as the type Time. you need to use NumericDate type, so your code will looks like this:

claims := &jwt.RegisteredClaims{
    Issuer: "Test",
    ExpiresAt: &jwt.NumericDate{now.Add(time.Hour * 24)},
}

edited Jul 17 '22 at 14:16

answered Jul 17 '22 at 14:01

Jay

31
1
3

score 2 · Answer 2 · answered Dec 20 '22 at 09:31

2

Okay, you can change

github.com/dgrijalva/jwt-go/v4 => github.com/golang-jwt/jwt/v4   //v4.4.3

StandardClaims => RegisteredClaims

now.Add(time.Hour * 24).Unix()  => jwt.NewNumericDate(now.Add(time.Hour * 24))

answered Dec 20 '22 at 09:31

CONG NGUYEN

21
2

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Dec 22 '22 at 14:11

score 1 · Answer 3 · edited Jun 30 '22 at 19:21

1

ExpiresAt requires the datatype to be *time.Time and the function Unix() returns the time in a number of seconds in int64.

I recommend you to use the package github.com/golang-jwt/jwt rather than the one you are using now, which is no longer maintained.

edited Jun 30 '22 at 19:21

blackgreen

34,072
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129

answered Feb 18 '22 at 06:37

Shane umayanga

36
4

score 0 · Answer 4 · answered Jul 29 '22 at 09:15

func GenerateToken(username, password string) (string, error) {
    nowTime := time.Now()
    expireTime := nowTime.Add(12 * time.Hour)

    claims := Claims{
        username,
        password,
        jwt.RegisteredClaims{
            ExpiresAt: jwt.NewNumericDate(expireTime),
            Issuer:    "test",
        },
    }
    
    tokenClaims := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
    token, err := tokenClaims.SignedString(jwtSecret)

    return token, err
}

You can try it

score 0 · Answer 5 · answered Sep 08 '22 at 11:26

0

your code is Okay the problem is with the importation of your package you can change the import

from

"github.com/dgrijalva/jwt-go/v4"

to

"github.com/dgrijalva/jwt-go"

answered Sep 08 '22 at 11:26

Lamech Desai

709
6
11

Golang jwt.StandardClaims time format type issue

5 Answers5