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
-- 
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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