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# Which Problems Are Solved Currently ZITADEL supports RP-initiated logout for clients. Back-channel logout ensures that user sessions are terminated across all connected applications, even if the user closes their browser or loses connectivity providing a more secure alternative for certain use cases. # How the Problems Are Solved If the feature is activated and the client used for the authentication has a back_channel_logout_uri configured, a `session_logout.back_channel` will be registered. Once a user terminates their session, a (notification) handler will send a SET (form POST) to the registered uri containing a logout_token (with the user's ID and session ID). - A new feature "back_channel_logout" is added on system and instance level - A `back_channel_logout_uri` can be managed on OIDC applications - Added a `session_logout` aggregate to register and inform about sent `back_channel` notifications - Added a `SecurityEventToken` channel and `Form`message type in the notification handlers - Added `TriggeredAtOrigin` fields to `HumanSignedOut` and `TerminateSession` events for notification handling - Exported various functions and types in the `oidc` package to be able to reuse for token signing in the back_channel notifier. - To prevent that current existing session termination events will be handled, a setup step is added to set the `current_states` for the `projections.notifications_back_channel_logout` to the current position - [x] requires https://github.com/zitadel/oidc/pull/671 # Additional Changes - Updated all OTEL dependencies to v1.29.0, since OIDC already updated some of them to that version. - Single Session Termination feature is correctly checked (fixed feature mapping) # Additional Context - closes https://github.com/zitadel/zitadel/issues/8467 - TODO: - Documentation - UI to be done: https://github.com/zitadel/zitadel/issues/8469 --------- Co-authored-by: Hidde Wieringa <hidde@hiddewieringa.nl>
75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
package command
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import (
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"github.com/zitadel/zitadel/internal/eventstore"
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"github.com/zitadel/zitadel/internal/repository/sessionlogout"
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)
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type SessionLogoutWriteModel struct {
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eventstore.WriteModel
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UserID string
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OIDCSessionID string
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ClientID string
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BackChannelLogoutURI string
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BackChannelLogoutSent bool
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aggregate *eventstore.Aggregate
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}
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func NewSessionLogoutWriteModel(id string, instanceID string, sessionID string) *SessionLogoutWriteModel {
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return &SessionLogoutWriteModel{
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WriteModel: eventstore.WriteModel{
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AggregateID: id,
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ResourceOwner: instanceID,
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InstanceID: instanceID,
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},
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aggregate: &sessionlogout.NewAggregate(id, instanceID).Aggregate,
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OIDCSessionID: sessionID,
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}
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}
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func (wm *SessionLogoutWriteModel) Reduce() error {
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for _, event := range wm.Events {
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switch e := event.(type) {
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case *sessionlogout.BackChannelLogoutRegisteredEvent:
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wm.reduceRegistered(e)
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case *sessionlogout.BackChannelLogoutSentEvent:
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wm.reduceSent(e)
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}
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}
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return wm.WriteModel.Reduce()
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}
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func (wm *SessionLogoutWriteModel) Query() *eventstore.SearchQueryBuilder {
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query := eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent).
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AddQuery().
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AggregateTypes(sessionlogout.AggregateType).
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AggregateIDs(wm.AggregateID).
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EventTypes(
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sessionlogout.BackChannelLogoutRegisteredType,
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sessionlogout.BackChannelLogoutSentType,
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).
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EventData(map[string]interface{}{
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"oidc_session_id": wm.OIDCSessionID,
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}).
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Builder()
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return query
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}
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func (wm *SessionLogoutWriteModel) reduceRegistered(e *sessionlogout.BackChannelLogoutRegisteredEvent) {
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if wm.OIDCSessionID != e.OIDCSessionID {
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return
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}
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wm.UserID = e.UserID
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wm.ClientID = e.ClientID
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wm.BackChannelLogoutURI = e.BackChannelLogoutURI
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}
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func (wm *SessionLogoutWriteModel) reduceSent(e *sessionlogout.BackChannelLogoutSentEvent) {
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if wm.OIDCSessionID != e.OIDCSessionID {
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return
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}
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wm.BackChannelLogoutSent = true
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}
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