You seem to be using userinfo and not introspect endpoint in your 
configuration. Does userinfo return active too?

Aki

> On 04/10/2023 20:05 EEST Christian Rößner via dovecot <dovecot@dovecot.org> 
> wrote:
> 
>  
> Hi,
> 
> well I fear there is still something wrong.
> 
> > Am 04.10.2023 um 15:05 schrieb Aki Tuomi via dovecot <dovecot@dovecot.org>:
> > 
> >> 
> >> On 04/10/2023 16:02 EEST Christian Rößner <li...@mlserv.org> wrote:
> >> 
> >> 
> >> Hi,
> >> 
> >>> Am 04.10.2023 um 14:31 schrieb Aki Tuomi <aki.tu...@open-xchange.com>:
> >>> 
> >>>> 
> >>>> On 04/10/2023 15:13 EEST Christian Rößner via dovecot 
> >>>> <dovecot@dovecot.org> wrote:
> >>>> 
> >>>> 
> >>>> Hi,
> >>>> 
> >>>>> Am 04.10.2023 um 12:56 schrieb Arjen de Korte 
> >>>>> <build+dove...@de-korte.org>:
> >>>>> 
> >>>>> Citeren Christian Rößner via dovecot <dovecot@dovecot.org>:
> >>>>> 
> >>>>>> Hi,
> >>>>>> 
> >>>>>> I use Roundcube with OIDC. Everything works fine in Dovecot 2.3.20, 
> >>>>>> but broke in 2.3.21. Downgrading to 2.3.20 makes it work again, so it 
> >>>>>> is introduced in the newer release.
> >>>>>> 
> >>>>>> Error (2.3.21):
> >>>>>> ```
> >>>>>> Oct  4 11:03:57 mx dovecot[558531]: imap-login: Disconnected: 
> >>>>>> Connection closed (client didn't finish SASL auth, waited 1 secs): 
> >>>>>> user=<christian@roessner.email>, orig_user=<christian@roessner.email>, 
> >>>>>> method=XOAUTH2, rip=192.168.0.4, lip=192.168.0.2, TLS, TLSv1.3 with 
> >>>>>> cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
> >>>>>> ```
> >>>>>> 
> >>>>>> Here is an example with 2.3.20:
> >>>>>> 
> >>>>>> Success (2.3.20):
> >>>>>> ```
> >>>>>> Oct  4 11:17:21 mx dovecot[889914]: imap-login: Login: 
> >>>>>> user=<christian@roessner.email>, orig_user=<christian@roessner.email>, 
> >>>>>> method=XOAUTH2, rip=192.168.0.4, lip=192.168.0.2, mpid=891874, TLS, 
> >>>>>> TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
> >>>>>> ```
> >>>>> 
> >>>>> Searching the archives might give a lead to what's going on (and a 
> >>>>> possible workaround):
> >>>>> 
> >>>>> https://dovecot.org/mailman3/archives/list/dovecot@dovecot.org/thread/RR2GXLOAS6U3MZCQCA4T4S6QXCRV5GST
> >>>> 
> >>>> I get a different error from RC:
> >>>> 
> >>>> ```
> >>>> Oct 04 12:08:48 node1 8868c38d7990[158494]: errors: <48ea0f68> IMAP 
> >>>> Error: Login failed for christian@roessner.email against 
> >>>> mail.roessner-net.de from 192.168.32.1 (X-Real-IP: 
> >>>> 2003:a:a05:a600:858:7851:547f:8aed,X-Forwarded-For: 
> >>>> 2003:a:a05:a600:858:7851:547f:8aed). AUTHENTICATE XOAUTH2: A0001 NO 
> >>>> [AUTHENTICATIONFAILED] Authentication failed. in 
> >>>> /var/www/html/program/lib/Roundcube/rcube_imap.php on line 211 (GET 
> >>>> /index.php/login/oauth?code=ory_ac_L5_NrO7EjgIccmV-_Tq1Y1_vls6i9NS8lbO7mHYwVeQ.maAkpsqdG95hkLutiDi4aB2KDPvj_pQ65qD-tuY9zBI&scope=openid+offline_access+profile+email+dovecot&state=J3WpRsBcOrnw)
> >>>> ```
> >>>> 
> >>>> And changing the introspection_url parameter did not change anything.
> >>>> 
> >>>> Thanks in advance
> >>>> 
> >>>> Christian Rößner
> >>>> -- 
> >>> 
> >>> Can you provide auth_debug=yes logs?
> >> 
> >> Turning n debug showed the problem:
> >> 
> >> ```
> >> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> >> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): oauth2 
> >> active_attribute "active" is not present in the oauth2 server's response
> >> ```
> >> 
> >> In earlier configuration tests I had an 'active' claim. Dovecot prior 
> >> 2.3.21 seems to had ignored a missing field, while newer version expect it 
> >> to be present if configured.
> >> 
> >> Thanks.
> >> 
> >> Christian Rößner
> >> -- 
> > 
> > Yes, this was a bug that was fixed, that the active attribute is now 
> > actually checked.
> 
> I thought I had mistakenly removed the active field, but I did not:
> 
> ```
> curl -X POST -d 'scope=email&token=****HIDDEN***' 
> https://oauth.authserv.me:4445/admin/oauth2/introspect
> 
> {"active":true,"scope":"openid profile email groups dovecot offline 
> offline_access","client_id":"718f4a52-e1a8-431d-9146-15809cfe3240","sub":"977c6572-d017-103b-836b-b5fc6e126160","exp":1696442299,"iat":1696438699,"nbf":1696438699,"aud":[],"iss":"https://oauth.authserv.me:4444","token_type":"Bearer","token_use":"access_token"}
> ```
> 
> As you can see, the 'active' field exists, but Dovecot expects it to be a 
> claim, which it is not.
> 
> From auth_debug:
> 
> ```
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Making token 
> validation lookup to https://oauth.authserv.me:4444/userinfo?access_token=
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Token 
> validation succeeded
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field auth_time
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field dovecot_mailbox_path
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field dovecot_user
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field email
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field family_name
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field given_name
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field iat
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field iss
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field name
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field nickname
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field preferred_username
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field rat
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): Processing 
> field sub
> Oct  4 14:50:31 mx dovecot[1302421]: auth: Debug: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): oauth2 
> active_attribute "active" is not present in the oauth2 server's response
> Oct  4 14:50:31 mx dovecot[1302421]: auth: 
> oauth2(christian@roessner.email,192.168.0.4,<3kfgc+MGeuXAqAAE>): oauth2 
> failed: Token is not valid: Missing active_attribute from token
> ```
> 
> Is this a bug or does the active field shown above nothing have to do with 
> the active field in the dovecot configuration?
> 
> I would expect the field shown above.
> 
> Thanks in advance
> 
> Christian Rößner
> -- 
> Rößner-Network-Solutions
> Zertifizierter ITSiBe / CISO
> Karl-Bröger-Str. 10, 36304 Alsfeld
> Fax: +49 6631 78823409, Mobil: +49 171 9905345
> USt-IdNr.: DE225643613, https://roessner.website
> PGP fingerprint: 658D 1342 B762 F484 2DDF 1E88 38A5 4346 D727 94E5 
> 
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