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token.go
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token.go
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package service
import (
"fmt"
"time"
"github.com/dgrijalva/jwt-go"
"github.com/murilo-bracero/raspstore/auth-service/internal"
"github.com/murilo-bracero/raspstore/auth-service/internal/model"
)
type TokenService interface {
Verify(rawToken string) (userClaims *model.UserClaims, err error)
Generate(user *model.User) (string, error)
}
type tokenService struct{}
func NewTokenService() TokenService {
return &tokenService{}
}
func (t *tokenService) Verify(rawToken string) (userClaims *model.UserClaims, err error) {
parsedToken, err := jwt.ParseWithClaims(rawToken, &model.UserClaims{}, func(token *jwt.Token) (interface{}, error) {
if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, fmt.Errorf("error reading jwt: wrong signing method: %v", token.Header["alg"])
} else {
return []byte(internal.TokenSecret()), nil
}
})
if err != nil {
return nil, err
}
return parsedToken.Claims.(*model.UserClaims), nil
}
func (t *tokenService) Generate(user *model.User) (string, error) {
claims := model.UserClaims{
StandardClaims: jwt.StandardClaims{
ExpiresAt: time.Now().Add(time.Duration(internal.TokenDuration()) * time.Second).Unix(),
},
Uid: user.UserId,
Roles: user.Permissions,
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
return token.SignedString([]byte(internal.TokenSecret()))
}