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grant_offline_service.go
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grant_offline_service.go
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package oauth
import (
"errors"
"time"
"github.com/authgear/authgear-server/pkg/lib/config"
"github.com/authgear/authgear-server/pkg/lib/session/idpsession"
"github.com/authgear/authgear-server/pkg/util/clock"
)
type ServiceIDPSessionProvider interface {
Get(id string) (*idpsession.IDPSession, error)
CheckSessionExpired(session *idpsession.IDPSession) (expired bool)
}
type OfflineGrantService struct {
OAuthConfig *config.OAuthConfig
Clock clock.Clock
IDPSessions ServiceIDPSessionProvider
ClientResolver OAuthClientResolver
}
func (s *OfflineGrantService) IsValid(session *OfflineGrant) (bool, time.Time, error) {
offlineSessionExpired, expiry, err := s.CheckSessionExpired(session)
if err != nil {
return false, time.Time{}, err
}
if offlineSessionExpired {
return false, expiry, nil
}
now := s.Clock.NowUTC()
if session.SSOEnabled {
if session.IDPSessionID == "" {
return false, now, nil
}
idp, err := s.IDPSessions.Get(session.IDPSessionID)
if err != nil {
if errors.Is(err, idpsession.ErrSessionNotFound) {
return false, now, nil
}
return false, time.Time{}, err
}
idpSessionExpired := s.IDPSessions.CheckSessionExpired(idp)
if idpSessionExpired {
return false, now, nil
}
}
return true, expiry, nil
}
func (s *OfflineGrantService) ComputeOfflineGrantExpiry(session *OfflineGrant) (expiry time.Time, err error) {
clientConfig := s.ClientResolver.ResolveClient(session.ClientID)
if clientConfig == nil {
err = ErrGrantNotFound
return
}
expiry = s.computeOfflineGrantExpiryWithClient(session, clientConfig)
return
}
func (s *OfflineGrantService) CheckSessionExpired(session *OfflineGrant) (bool, time.Time, error) {
now := s.Clock.NowUTC()
expiry, err := s.ComputeOfflineGrantExpiry(session)
if errors.Is(err, ErrGrantNotFound) {
return true, now, nil
} else if err != nil {
return false, time.Time{}, err
}
offlineGrantExpired := now.After(expiry)
return offlineGrantExpired, expiry, nil
}
func (s *OfflineGrantService) computeOfflineGrantExpiryWithClient(session *OfflineGrant, cfg *config.OAuthClientConfig) (expiry time.Time) {
expiry = session.CreatedAt.Add(cfg.RefreshTokenLifetime.Duration())
if *cfg.RefreshTokenIdleTimeoutEnabled {
idleExpiry := session.AccessInfo.LastAccess.Timestamp.Add(cfg.RefreshTokenIdleTimeout.Duration())
if idleExpiry.Before(expiry) {
expiry = idleExpiry
}
}
return
}