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session_helpers.go
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session_helpers.go
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package authn
import (
"fmt"
"github.com/gorilla/sessions"
"github.com/labstack/echo/v4"
"github.com/hatchet-dev/hatchet/pkg/config/server"
"github.com/hatchet-dev/hatchet/pkg/encryption"
"github.com/hatchet-dev/hatchet/pkg/repository/prisma/db"
)
type SessionHelpers struct {
config *server.ServerConfig
}
func NewSessionHelpers(config *server.ServerConfig) *SessionHelpers {
return &SessionHelpers{
config: config,
}
}
func (s *SessionHelpers) SaveAuthenticated(c echo.Context, user *db.UserModel) error {
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return err
}
session.Values["authenticated"] = true
session.Values["user_id"] = user.ID
return session.Save(c.Request(), c.Response())
}
func (s *SessionHelpers) SaveUnauthenticated(c echo.Context) error {
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return err
}
// unset all values
session.Values = make(map[interface{}]interface{})
session.Values["authenticated"] = false
// we set the maxage of the session so that the session gets deleted. This avoids cases
// where the same cookie can get re-authed to a different user, which would be problematic
// if the session values weren't properly cleared on logout.
session.Options.MaxAge = -1
return session.Save(c.Request(), c.Response())
}
func (s *SessionHelpers) SaveKV(
c echo.Context,
k, v string,
) error {
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return err
}
session.Values[k] = v
return session.Save(c.Request(), c.Response())
}
func (s *SessionHelpers) GetKey(
c echo.Context,
k string,
) (string, error) {
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return "", err
}
v, ok := session.Values[k]
if !ok {
return "", fmt.Errorf("key not found")
}
vStr, ok := v.(string)
if !ok {
return "", fmt.Errorf("could not cast value to string")
}
return vStr, nil
}
func (s *SessionHelpers) RemoveKey(
c echo.Context,
k string,
) error {
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return err
}
delete(session.Values, k)
return session.Save(c.Request(), c.Response())
}
func (s *SessionHelpers) SaveOAuthState(
c echo.Context,
integration string,
) (string, error) {
state, err := encryption.GenerateRandomBytes(16)
if err != nil {
return "", err
}
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return "", err
}
stateKey := fmt.Sprintf("oauth_state_%s", integration)
// need state parameter to validate when redirected
session.Values[stateKey] = state
// need a parameter to indicate that this was triggered through the oauth flow
session.Values["oauth_triggered"] = true
if err := session.Save(c.Request(), c.Response()); err != nil {
return "", err
}
return state, nil
}
func (s *SessionHelpers) ValidateOAuthState(
c echo.Context,
integration string,
) (isValidated bool, isOAuthTriggered bool, err error) {
stateKey := fmt.Sprintf("oauth_state_%s", integration)
session, err := s.config.SessionStore.Get(c.Request(), s.config.SessionStore.GetName())
if err != nil {
return false, false, err
}
if _, ok := session.Values[stateKey]; !ok {
return false, false, fmt.Errorf("state parameter not found in session")
}
if c.Request().URL.Query().Get("state") != session.Values[stateKey] {
return false, false, fmt.Errorf("state parameters do not match")
}
if isOAuthTriggeredVal, exists := session.Values["oauth_triggered"]; exists {
var ok bool
isOAuthTriggered, ok = isOAuthTriggeredVal.(bool)
isOAuthTriggered = ok && isOAuthTriggered
}
// need state parameter to validate when redirected
session.Values[stateKey] = ""
session.Values["oauth_triggered"] = false
if err := session.Save(c.Request(), c.Response()); err != nil {
return false, false, fmt.Errorf("could not clear session")
}
return true, isOAuthTriggered, nil
}
func saveNewSession(c echo.Context, session *sessions.Session) error {
session.Values["authenticated"] = false
return session.Save(c.Request(), c.Response())
}