[keycloak-dev] Override Refresh token lifespan per client

Tue Sep 24 01:46:22 EDT 2019

> For authorization code flow it makes no sense at all to have different session timeouts as it is by definition a shared SSO session. Different security levels should be controlled things like step-up and authentication timeout, not by having different session timeouts. Further, I'm not sure if refresh token timeout should be configurable per-client here as end of the day a new refresh token can easily be obtained as long as the session is still active.

Clients guarantee to end-users that clients access to end-users' resources only within the expiration using the tokens. So end-users need to re-login after the expiration and clients must not refresh tokens after the expiration.
The expiration depends on each client by security reason, or usability reason, or so on.
Therefore regardless of which authorization flows we use, we need to make a difference between session timeouts.

> I'm not particularly found of introducing so many settings on a client. It's difficult to setup and error prone. So this use-case needs to be described properly and we need to find a decent solution to it. Simply adding all these settings on a client may work for you, but I doubt others would understand how and when to use them, and I think it can easily end up resulting in a lot of error cases.

How about providing a checkbox which enables a one-to-one relationship between UserSessionModel and ClientSessionModel?
Currently, UserSessionModel and ClientSessionModel are a one-to-many relationship, and this makes it difficult to set session timeout per client.
If the checkbox enabled, not link a new ClientSessionModel to the existing UserSessionModel when a new client which uses the existing authentication result appeared but make a new UserSessionModel.
If this possible, we don't need to change the way to manage sessions.

Regards,
Yoshiyuki Tabata
Hitachi, Ltd.

From: Stian Thorgersen <sthorger at redhat.com>
Sent: Friday, September 20, 2019 6:00 PM
To: TABATA，YOSHIYUKI <yoshiyuki.tabata.jy at hitachi.com>
Cc: keycloak-dev <keycloak-dev at lists.jboss.org>
Subject: [!]Re: [keycloak-dev] Override Refresh token lifespan per client

I'm still not quite following what you are trying to achieve.

For authorization code flow it makes no sense at all to have different session timeouts as it is by definition a shared SSO session. Different security levels should be controlled things like step-up and authentication timeout, not by having different session timeouts. Further, I'm not sure if refresh token timeout should be configurable per-client here as end of the day a new refresh token can easily be obtained as long as the session is still active.

For client credentials grant where the server obtains tokens this may make sense.

I'm not particularly found of introducing so many settings on a client. It's difficult to setup and error prone. So this use-case needs to be described properly and we need to find a decent solution to it. Simply adding all these settings on a client may work for you, but I doubt others would understand how and when to use them, and I think it can easily end up resulting in a lot of error cases.

On Fri, 20 Sep 2019 at 08:40, TABATA，YOSHIYUKI <yoshiyuki.tabata.jy at hitachi.com<mailto:yoshiyuki.tabata.jy at hitachi.com>> wrote:
Hello,

In cloud-native application systems, there are various client applications and those applications are not the same level (i.e. security level, alliance level, development level). And generally, a realm manager or a resource server manager wants to set a different timeout to tokens (access token/refresh token) per client. For example, for a client which wants to minimize authentication considering usability, we set the timeout of a refresh token longer enough. For a client which wants to refresh tokens periodically to mitigate the token interception attack, we set the timeout of a refresh token according to the client requirement.

Currently, the timeout of an access token can be overridden per client. However, the timeout of a refresh token (including offline token) cannot be overridden per client.

We'd like to be able to override the timeout of a refresh token (including offline token) per client.

We'd already tried to implement this just like access token lifespan overriding, and create JIRA ticket and PR, but Stian recommended that we should discuss this use case and how to implement in ML, so I opened this thread.

For single sign-on purpose, it is useful to share sessions among clients in a realm.
However, when we implement this, sessions are no longer shared among clients depending on the settings. And this is useful for API management purpose because, for API management purpose, tokens (= sessions) are associated with each client, and should be managed per client.

What do you think about this feature? I would be very happy if you community gives any kind of comment on that.

JIRA ticket is the following.
https://issues.jboss.org/browse/KEYCLOAK-10907<https://clicktime.symantec.com/3XksWm4odSS8VwXNrH1nE8Q7Vc?u=https%3A%2F%2Fissues.jboss.org%2Fbrowse%2FKEYCLOAK-10907>

PR is the following.
https://github.com/keycloak/keycloak/pull/6309<https://clicktime.symantec.com/3KpbzQn7GfmuzEjrULq3CKg7Vc?u=https%3A%2F%2Fgithub.com%2Fkeycloak%2Fkeycloak%2Fpull%2F6309>

Regards,
Yoshiyuki Tabata
Hitachi, Ltd.

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