50 lines
1.0 KiB
Go
50 lines
1.0 KiB
Go
package auth
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import (
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"errors"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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type Claims struct {
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UserID string `json:"uid"`
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jwt.RegisteredClaims
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}
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type Service struct {
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secret []byte
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}
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func New(secret string) *Service {
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return &Service{secret: []byte(secret)}
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}
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func (s *Service) Sign(userID string) (string, error) {
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claims := Claims{
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UserID: userID,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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},
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}
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return jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString(s.secret)
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}
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func (s *Service) Verify(tokenStr string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(t *jwt.Token) (any, error) {
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if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, errors.New("unexpected signing method")
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}
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return s.secret, nil
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})
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if err != nil {
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return nil, err
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}
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claims, ok := token.Claims.(*Claims)
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if !ok || !token.Valid {
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return nil, errors.New("invalid token")
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}
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return claims, nil
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}
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