apt config options to specify the CA of the https repository?

To: Debian-user Mailing List <debian-user@lists.debian.org>
Subject: apt config options to specify the CA of the https repository?
From: Harald Dunkel <harald.dunkel@aixigo.com>
Date: Fri, 19 Sep 2025 13:32:28 +0000
Message-id: <[🔎] AS8PR01MB7462042C1B6C2FF7E4DDA39F8511A@AS8PR01MB7462.eurprd01.prod.exchangelabs.com>

Hi folks,

is there some way to tell apt the path to the root CA certificate, so it could
verify the certificate chain provided by a private debian repository via https?
I had added tho root CA to /usr/local/share/ca-certificates seem and ran
update-ca-certificates, but this did not help.

Hopefully I am not too blind to see, but apt.conf(5) and the others don't
mention certificates.

Regards
Harri
District Court Aachen - HRB 8057
Management Board: Arnaud Picut (CEO), Hicham El Bonne (CTO)
Chairman of the Supervisory Board: Benjamin Carl Lucas

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