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40 lines
956 B

package auth
import (
"time"
"github.com/golang-jwt/jwt/v5"
)
func GenerateToken(username string, secret []byte, duration time.Duration) (string, time.Time, error) {
now := time.Now().UTC()
expiresAt := now.Add(duration)
claims := jwt.MapClaims{
"sub": username,
"iat": now.Unix(),
"exp": expiresAt.Unix(),
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
tokenStr, err := token.SignedString(secret)
if err != nil {
return "", time.Time{}, err
}
return tokenStr, expiresAt, nil
}
func ValidateToken(tokenStr string, secret []byte) (*jwt.MapClaims, error) {
token, err := jwt.Parse(tokenStr, func(t *jwt.Token) (any, error) {
if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, jwt.ErrSignatureInvalid
}
return secret, nil
})
if err != nil {
return nil, err
}
claims, ok := token.Claims.(jwt.MapClaims)
if !ok || !token.Valid {
return nil, jwt.ErrSignatureInvalid
}
return &claims, nil
}