Viktor Dukhovni:
> On Mon, Apr 01, 2019 at 10:38:49AM -0400, Viktor Dukhovni wrote:
> 
> > On Mon, Apr 01, 2019 at 02:09:25PM +0300, Andrei Kovacs wrote:
> > 
> > > So, if I understand correctly, the configuration for the SNI file if it is
> > > in hash format should be:
> > > 
> > > domain1.com static:/path/to/pem1.pem
> > > domain2.com static:/path/to/pem2.pem
> > 
> > That makes no sense.  You're putting tables inside tables.  It is
> > not turtles all the way down.  The correct syntax is:
> > 
> >     main.cf:
> >     indexed = ${default_database_type}:${config_directory}/
> >     tls_server_sni_maps = ${indexed}sni-chains
> > 
> >     sni-chains:
> >     domain1.example /etc/postfix/sni/domain1.example.pem
> >     domain2.example /etc/postfix/sni/domain2.example.pem
> > 
> > The "sni-chains" table MUST be created with "postmap -F". It holds
> > a snapshot of the *content* of the listed files, not their names!
> > 
> > If you later change the file content, but don't rebuild the table,
> > the data in the table will remain stale.  You'll need to rebuild
> > the table (again with "postmap -F") whenever you want to start using
> > new certificates, even if the file names are unchanged.
> > 
> > The files must always list the private key before the associated
> > certificate chain.  You can list a file with just the key first,
> > and then the certificate file.  An advanced use case is to list
> > multiple files for the same domain, each with a key and certificate
> > chain for a different algorithm.  Or you can concatenate multiple
> > chains into a single file (again one per algorithm, with the key
> > first).
> 
> It seems a documentation update is needed, but I'd like to hear
> whether the above is sufficiently clear, or whether more remains
> unclear.  This may need a new section in TLS_README.  Or should we
> spin off a smaller SNI_README?

If you can fix this for the stable release without refactoring
documentation that would be best. Refactoring can happen in the
development release.

        Wietse

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