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paseto_maker.go
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/
paseto_maker.go
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package token
import (
"fmt"
"time"
"github.com/hhow09/simple_bank/util"
"github.com/o1egl/paseto"
"golang.org/x/crypto/chacha20poly1305"
)
// implements Maker interface
type PasetoMaker struct {
paseto *paseto.V2
symmetricKey []byte
}
func NewPasetoMaker(config util.Config) (Maker, error) {
symmetricKey := config.TokenSymmetricKey
if len(symmetricKey) != chacha20poly1305.KeySize {
return nil, fmt.Errorf("invalid key size: must be exactly %d characters, you have %d", chacha20poly1305.KeySize, len(symmetricKey))
}
maker := &PasetoMaker{
paseto: paseto.NewV2(),
symmetricKey: []byte(symmetricKey),
}
return maker, nil
}
func (maker *PasetoMaker) CreateToken(username string, duration time.Duration) (string, error) {
payload, err := NewPayload(username, duration)
if err != nil {
return "", err
}
return maker.paseto.Encrypt(maker.symmetricKey, payload, nil)
}
func (maker *PasetoMaker) VerifyToken(token string) (*Payload, error) {
payload := &Payload{}
err := maker.paseto.Decrypt(token, maker.symmetricKey, payload, nil)
if err != nil {
return nil, ErrInvalidToken
}
err = payload.Valid()
if err != nil {
return nil, err
}
return payload, nil
}