Dovecot & OAuth

[Stephan Bosch]

On 06/12/2019 20:54, Aki Tuomi via dovecot wrote:
> Hi!
>
> It seems there is a bug in the oauth2 driver, it loads the cert files wrong way. I'll make an internal bug report of this.

Tracking as DOP-1590.

Regards,

Stephan.


>> On 06/12/2019 16:42 mizuki <mizuki0621 at gmail.com> wrote:
>>
>>
>> Hi,
>>
>> For troubleshooting purposes, I change the read/write permissions on the certs and confirmed 'dovecot' can read them w/o problem, but still seeing the same errors. :(
>> Mizuki
>>
>>
>> On Fri, Dec 6, 2019 at 1:35 AM Aki Tuomi <aki.tuomi at open-xchange.com> wrote:
>>>   
>>> Is the key/cert pair readable by dovecot user? auth process does not run as root.
>>>   
>>>
>>>
>>>   
>>> You can add
>>>   
>>>
>>>
>>>   
>>> service auth {
>>>   
>>> extra_groups = ssl_cert
>>>   
>>> }
>>>   
>>>
>>>
>>>   
>>> and chgrp the cert to ssl_cert to allow access to the cert.
>>>   
>>>
>>>
>>>   
>>> Aki
>>>   
>>>> On 06/12/2019 04:16 mizuki via dovecot <dovecot at dovecot.org> wrote:
>>>>   
>>>>
>>>>
>>>>   
>>>>
>>>>
>>>>   
>>>> I changed some of the tls options following the document, now config is following:
>>>>   
>>>>
>>>>
>>>>   
>>>>
>>>>
>>>>   
>>>> tokeninfo_url = https://keycloak.com/auth/realms/mail/protocol/openid-connect/token
>>>> introspection_url = https://dovecot:7598e21b-ec34-481f-80d0-059bddae0923@keycloak.com/auth/realms/demo/protocol/openid-connect/token/introspect
>>>> introspection_mode = post
>>>> debug = yes
>>>> rawlog_dir = /tmp/oauth2
>>>> #force_introspection = yes
>>>> username_attribute = username
>>>> #active_attribute = active
>>>> #active_value = true
>>>> tls_ca_cert_file = /etc/pki/CA/certs/incommon-rsa-server-ca.crt
>>>> tls_cert_file = /etc/pki/dovecot/certs/dovecot.pem
>>>> tls_key_file = /etc/pki/dovecot/private/dovecot.pem
>>>>
>>>>   
>>>> ---------------
>>>>   
>>>>
>>>>
>>>>   
>>>> The debug log is showing now slightly different msg ex:
>>>>   
>>>> Dec 5 21:09:59 mktst4 dovecot: auth: Error: oauth2(mizuki,10.0.2.1,<29b4iv+YKuuCx5Tr>): oauth2 failed: Couldn't initialize SSL context: Can't load SSL certificate: There is no valid PEM certificate.
>>>>   
>>>>
>>>>
>>>>   
>>>> Still not able to connect to the keyclaok server. :(
>>>>
>>>>   
>>>>
>>>>
>>>>   
>>>> PS: Dovecot & Keycloak severs are both using the same legit cert/key pair with CA file configured.
>>>>   
>>>>
>>>>
>>>>   
>>>> Thanks!
>>>>   
>>>> Mizuki
>>>>
>>>>   
>>>>
>>>>
>>>>   
>>>>   
>>>> On Thu, Dec 5, 2019 at 3:06 PM Aki Tuomi < aki.tuomi at open-xchange.com> wrote:
>>>>
>>>>   
>>>>> Before declaring it not ready for prime time, did you try setting
>>>>>   
>>>>> tls_ca_cert_file = /etc/ssl/certs/ca-certificates.crt
>>>>>   
>>>>> In the oauth2 configuration file as documented in https://doc.dovecot.org/configuration_manual/authentication/oauth2 ?
>>>>>   
>>>>> Aki
>>>>>   
>>>>>> On 05/12/2019 21:58 mizuki via dovecot < dovecot at dovecot.org> wrote:
>>>>>>
>>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> We'd like to enable OAuth with Keycloak in Dovecot, after enabling 'OAUTHBEARER XOAUTH2' in Dovecot based on online document, I can confirm Dovecot is ready for OAuth using openssl command, however when the auth request comes in, it failed in establishing a SSL connection with Keycloak server on port 443, shown as following in debug logs. I can confirming using commands 'openssl s_client -connect <keycloak_server>:443' or 'curl -v https://<keycloak_server/' all returns normal and no errors. Altering some of the SSL options in dovecot such as 'ssl_ca = </etc/pki/CA/certs/root_ca.pem' or 'ssl_client_ca_file = </etc/pki/CA/certs/root_ca.pem' does not help either. The certificate are NOT self-signed but signed the legit authorities. So I'm not sure why dovecot could not establish the connections.
>>>>>>