[Dovecot] SSL fields as variables for SQL statements ...

Hi,

I was wondering if there is any possibility to access the status if a user has provided a certificate, that has been accepted or not via variables. And further if there is any way to get the value of SSL certificate fields by use variables. I'd like to use those variables in sql statements.

I then could assign a single certificate to a user, and make up passdb sql statements, that allow him to access multiple (but not all) mailboxes without the need to issue any further certificates.

Michael