65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package auth
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/golang-jwt/jwt/v5"
|
|
)
|
|
|
|
type Claims struct {
|
|
Username string `json:"username"`
|
|
jwt.RegisteredClaims
|
|
}
|
|
|
|
func secret() ([]byte, error) {
|
|
s := os.Getenv("JWT_SECRET")
|
|
if s == "" {
|
|
return nil, errors.New("JWT_SECRET is not set")
|
|
}
|
|
return []byte(s), nil
|
|
}
|
|
|
|
func NewAccessToken(username string, ttl time.Duration) (string, error) {
|
|
key, err := secret()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
now := time.Now()
|
|
claims := Claims{
|
|
Username: username,
|
|
RegisteredClaims: jwt.RegisteredClaims{
|
|
Subject: username,
|
|
IssuedAt: jwt.NewNumericDate(now),
|
|
ExpiresAt: jwt.NewNumericDate(now.Add(ttl)),
|
|
},
|
|
}
|
|
|
|
t := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
|
|
return t.SignedString(key)
|
|
}
|
|
|
|
func ParseAccessToken(tokenString string) (*Claims, error) {
|
|
key, err := secret()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (any, error) {
|
|
return key, nil
|
|
},
|
|
jwt.WithValidMethods([]string{jwt.SigningMethodHS256.Alg()}),
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
claims, ok := token.Claims.(*Claims)
|
|
if !ok || !token.Valid {
|
|
return nil, errors.New("invalid token")
|
|
}
|
|
|
|
return claims, nil
|
|
}
|