[keycloak-user] When should auth_time claim be updated?

[Marek Posolda]

Looks like a bug. Could you please create JIRA for this?

Thanks,
Marek

On 26/07/17 01:19, Matt Evans wrote:
> After looking at the code it seems that this is controlled for each authentication attempt with the SSO_AUTH note, the CookieAuthenticator sets it as a client note if cookie authentication succeeds, and the AuthenticationManager checks it and if it's not true updates the auth_time. I can't see anywhere that clears it. I'm not sure how long client notes live, but I assume longer than the current authentication attempt, because once it's set, I can see that it stays true for all my "prompt=login" authentication attempts after that.
>
> I changed the CookieAuthenticator to clear the flag first and this seems to fix the problem for me, however, I'm not sure if that's the best approach?
>
> Matt
>
> -----Original Message-----
> From: Marek Posolda [mailto:mposolda at redhat.com]
> Sent: Saturday, 22 July 2017 12:45 AM
> To: Matt Evans <mevans at aconex.com>; keycloak-user <keycloak-user at lists.jboss.org>
> Subject: Re: [keycloak-user] When should auth_time claim be updated?
>
> On 21/07/17 07:57, Matt Evans wrote:
>> Hi
>>
>> We are working with keycloak v3.2.0  and are using 'prompt=login' to initiate a re-authentication for sensitive actions, and we use the auth_time claim to determine if this should occur.
>>
>> Ordinarily each time we redirect to the auth endpoint with 'prompt=login' the auth_time is updated to the time that the authentication occurred.
>>
>> However, if we then redirect to the auth endpoint and the cookie is valid and used, any subsequent time after this authentication that we use the auth endpoint with 'prompt=login' the auth_time claim is not updated.
>>
>> Is this intended behaviour?
> Yes. The claim "auth_time" points to the time of the active authentication. And the re-authentication with SSO cookie is not treated as "active" authentication, so this won't update auth_time. With "prompt=login" you need actively authenticate, so that will update auth_time.
>
> Marek
>> Thanks
>>
>> Matt
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>
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