Custom Claimer

gistfile1.txt

type Claims struct {
	AccountID string `json:"account_id"`
	GroupID   string `json:"group_id"`
	jwtgo.StandardClaims
}

// Encode
func (c *Claims) Encode(secretKey []byte) (string, error) {
	const op = errors.Op("jwt.Claims.Encode")

	token := jwtgo.NewWithClaims(jwtgo.SigningMethodHS256, c)

	tok, err := token.SignedString(secretKey)
	if err != nil {
		return "", errors.E(op, err)
	}

	return tok, nil
}

// Decode tries to decode given token by using secret key
func (c *Claims) Decode(secretKey []byte, jwtToken string) error {
	const op = errors.Op("jwt.Claims.Decode")

	token, err := jwtgo.ParseWithClaims(jwtToken, c, func(token *jwtgo.Token) (interface{}, error) {
		if _, ok := token.Method.(*jwtgo.SigningMethodHMAC); !ok {
			return nil, errors.E(op, "unexpected signing method")
		}
		return secretKey, nil
	})

	if err != nil {
		return err
	}

	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
		c.AccountID = claims.AccountID
		c.GroupID = claims.GroupID
		return nil
	}

	return errors.E(op, "not valid")
}