Extracting CLIENTID information from checkpassword or postlogin scripting

[Sami Ketola]

> On 17. Jan 2022, at 21.25, Dan Conway <darkc0de at archnix6.net> wrote:
> 
> Hello,
> 
> When extracting client_id information from the client connection (i.e. setting imap_id_log = *) the information is directly logged by Dovecot as such:
> ID sent: name=Thunderbird, version=91.5.0
> 
> My question is, Is it possible to export/set this information in a checkpassword script or a postlogin script?
> 
> client_id
> If imap_id_retain <https://doc.dovecot.org/settings/core/#core_setting-imap_id_retain> is enabled this variable is populated with the client ID request as IMAP arglist.
> 
> I've enabled both checkpassword and postlogin on a test server, as well as 'imap_id_retain' set to 'yes'. I wrote a simple Perl script that dumps everything in %ENV as well as @ARGV for checkpassword and postlogin, but I don't see any occurrences of ID information. I've also tried to see if I could supply that variable in dovecot.conf by setting 'client_id' as a parameter, but that didn't seem to do the trick either.
> 
> passdb {
> ...
>    # Doesn't work
>    args = /usr/local/bin/checkpassword.pl client_id
> 
>    # Doesn't work
>    args = /usr/local/bin/checkpassword.pl %{client_id}
> ...
> }
> 
> What am I missing? Is it possible to get these variables into an external script that checkpassword or postlogin executes?
> 
> 

Is your client sending IMAP ID pre login?

Sami


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