Dovecot mail-crypt webmail can't read encrypted messages

Serveria Support support at serveria.com
Wed Sep 14 15:04:03 UTC 2022 

Oh, I thought that section is for the global keys. I'm trying to use 
per-user/per-folder keys. I used this command:

doveadm -o plugin/mail_crypt_private_password=xxxxxxxxxx mailbox 
cryptokey generate -u user at mydomain.xyz -URf



On 2022-09-14 17:47, hi at zakaria.website wrote:
> On 2022-09-14 15:11, Serveria Support wrote:
>> How can I set the global private key in conf? I was following the 
>> official mail-crypt tutorial. This is what I have in dovecot.conf 
>> mail-crypt section:
>> 
>> mail_crypt_curve = secp521r1
>>     mail_crypt_save_version = 2
>>     mail_crypt_require_encrypted_user_key = yes
>> 
>> 
>> 
>> On 2022-09-14 17:23, hi at zakaria.website wrote:
>>> On 2022-09-14 14:41, Serveria Support wrote:
>>>> Hi,
>>>> 
>>>> This log shows no errors. Running doveadm fetch command gives me 
>>>> this:
>>>> 
>>>> doveadm(user at mydomain.xyz): Error: fetch(text) failed for box=INBOX 
>>>> uid=15: read() failed: 
>>>> read(/var/vmail/vmail1/mydomain.xyz/a/b/d/xxxxxxxx-2022.09.09.05.52.29//Maildir/cur/1663034263.M491074P1457418.mx,S=2217,W=2266:2,S) 
>>>> failed: Private key not available: Cannot decrypt key 
>>>> fd98762c573b8c54805884838695bd5b7eaeb9e0b0d326434c2f63a95a905a89: 
>>>> Cannot decrypt key 
>>>> 10fed5d3e938ce19a20046b84f29e50a271f6404f0760037996b4cf2d1ecfeb7: 
>>>> Password not available
>>>> 
>>>> On 2022-09-13 14:43, hi at zakaria.website wrote:
>>>>> On 2022-09-02 20:40, Serveria Support wrote:
>>>>>> I tried it but it doesn't seem to make any difference at all.
>>>>>> 
>>>>>> Can someone please assist me with reading logs? Does this log 
>>>>>> below mean Dovecot is trying to use master_user again or simply 
>>>>>> reading master_user password file?
>>>>>> 
>>>>>> Sep  2 15:35:33 mx dovecot: auth: Debug: Read auth token secret 
>>>>>> from /run/dovecot/auth-token-secret.dat
>>>>>> Sep  2 15:35:33 mx dovecot: auth: Debug: passwd-file 
>>>>>> /etc/dovecot/dovecot-master-users: Read 1 users in 0 secs
>>>>>> Sep  2 15:35:33 mx dovecot: auth: Debug: auth client connected 
>>>>>> (pid=900284)
>>>>>> Sep  2 15:35:33 mx dovecot: auth: Debug: client in: 
>>>>>> AUTH#0111#011PLAIN#011service=imap#011secured=tls#011session=Vfxm1bbnRo9/AAAB#011lip=127.0.0.1#011rip=127.0.0.1#011lport=143#011rport=36678#011local_name=127.0.0.1#011resp=AHRlc3RvQG1haWxjaXRhZGVsLnh5egA0SFBYMWt0OSE= 
>>>>>> (previous base64 data may contain sensitive data)
>>>>>> 
>>>>>> Everything ok here?
>>>>>> 
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: auth client connected 
>>>>>> (pid=899859)
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: client in: 
>>>>>> AUTH#0111#011PLAIN#011service=imap#011secured=tls#011session=97OusbbnXI1/AAAB#011lip=127.0.0.1#011rip=127.0.0.1#011lport=143#011rport=36188#011local_name=127.0.0.1#011resp=AHRlc3RvQG1haWxjaXRhZGVsLnh5egA0SFBYMWt0OSE= 
>>>>>> (previous base64 data may contain sensitive data)
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Performing 
>>>>>> passdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<3>: Handling 
>>>>>> PASSV request
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<3>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Performing 
>>>>>> passdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<3>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): query: 
>>>>>> SELECT mailbox.password, mailbox.allow_nets FROM mailbox,domain 
>>>>>> WHERE mailbox.username='user1 at mydomain.xyz' AND 
>>>>>> mailbox.`enableimaptls`=1 AND mailbox.active=1 AND 
>>>>>> mailbox.domain=domain.domain AND domain.backupmx=0 AND 
>>>>>> domain.active=1
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<3>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Finished 
>>>>>> passdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<3>: Finished
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Finished 
>>>>>> passdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: 
>>>>>> auth(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Auth 
>>>>>> request finished
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: client passdb out: 
>>>>>> OK#0111#011user=user1 at mydomain.xyz
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: master in: 
>>>>>> REQUEST#0111998585857#011899859#0111#01131314e9e09e38b194a05b78bfe279780#011session_pid=899860#011request_auth_token
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Performing 
>>>>>> userdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<4>: Handling 
>>>>>> USER request
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<4>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Performing 
>>>>>> userdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<4>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): SELECT 
>>>>>> LOWER(CONCAT(mailbox.storagebasedirectory, '/', 
>>>>>> mailbox.storagenode, '/', mailbox.maildir)) AS home, 
>>>>>> CONCAT(mailbox.mailboxformat, ':~/', mailbox.mailboxfolder) AS 
>>>>>> mail, CONCAT('*:bytes=', mailbox.quota*1048576) AS quota_rule FROM 
>>>>>> mailbox,domain WHERE mailbox.username='user1 at mydomain.xyz' AND 
>>>>>> mailbox.`enableimaptls`=1 AND mailbox.active=1 AND 
>>>>>> mailbox.domain=domain.domain AND domain.backupmx=0 AND 
>>>>>> domain.active=1
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<4>: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Finished 
>>>>>> userdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth-worker(899854): Debug: conn 
>>>>>> unix:auth-worker (pid=899853,uid=110): auth-worker<4>: Finished
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: 
>>>>>> sql(user1 at mydomain.xyz,127.0.0.1,<97OusbbnXI1/AAAB>): Finished 
>>>>>> userdb lookup
>>>>>> Sep  2 15:25:34 mx dovecot: auth: Debug: master userdb out: 
>>>>>> USER#0111998585857#011user1 at mydomain.xyz#011home=/var/vmail/vmail1/mydomain.xyz/t/e/s/xxxxx-2022.08.30.06.07.08/#011mail=maildir:~/Maildir#011quota_rule=*:bytes=1073741824#011auth_mech=PLAIN#011auth_token=fac9c351492fd6073176272c79ff65b1b3e87f37
>>>>>> 
>>>>>> Sep  2 15:25:34 mx dovecot: 
>>>>>> imap(user1 at mydomain.xyz)<899860><97OusbbnXI1/AAAB>: Debug: Added 
>>>>>> userdb setting: mail=maildir:~/Maildir
>>>>>> Sep  2 15:25:34 mx dovecot: 
>>>>>> imap(user1 at mydomain.xyz)<899860><97OusbbnXI1/AAAB>: Debug: Added 
>>>>>> userdb setting: plugin/quota_rule=*:bytes=1073741824
>>>>>> Sep  2 15:25:34 mx dovecot: 
>>>>>> imap(user1 at mydomain.xyz)<899860><97OusbbnXI1/AAAB>: Debug: 
>>>>>> Effective uid=2000, gid=2000, 
>>>>>> home=/var/vmail/vmail1/mydomain.xyz/t/e/s/xxxxx-2022.08.30.06.07.08/
>>>>>> 
>>>>>> Any ideas?
>>>>>> 
>>>>>> On 2022-09-02 20:08, dovecot at ptld.com wrote:
>>>>>>>> password_query = SELECT \
>>>>>>>>   username as user, password, \
>>>>>>>>   '%w' AS userdb_mail_crypt_private_password \
>>>>>>>>   FROM mailbox WHERE username="%u";
>>>>>>> 
>>>>>>> Try if using ' instead of " makes a difference.
>>>>>>> FROM mailbox WHERE username='%u';
>>>>> 
>>>>> The logs doesn't show any errors?
>>> 
>>> Private key not available? Isn't clear enough?
>>> 
>>> Did you set the global private key in dovecot config?
>>> 
>>> The error is saying the private key that meant to be used to decrypt
>>> emails is not found, thus it must be the path you set in mail crypt
>>> plugin definition is incorrect or private key file have either wrong
>>> ownership or permissions.
>>> 
>>> Notice it has to be in .pem format as well.
> 
> Check RSA key section, in
> https://doc.dovecot.org/configuration_manual/mail_crypt_plugin/#rsa-key

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