Mozilla::CA(3) User Contributed Perl Documentation Mozilla::CA(3)

Mozilla::CA - Mozilla's CA cert bundle in PEM format

use IO::Socket::SSL;
use Mozilla::CA;

my $host = "";
my $client = IO::Socket::SSL->new(
    PeerHost => "$host:443",
    SSL_verify_mode => 0x02,
    SSL_ca_file => Mozilla::CA::SSL_ca_file(),
    || die "Can't connect: $@";

$client->verify_hostname($host, "http")
    || die "hostname verification failure";

Mozilla::CA provides a copy of Mozilla's bundle of Certificate Authority certificates in a form that can be consumed by modules and libraries based on OpenSSL.

The module provide a single function:

Returns the absolute path to the Mozilla's CA cert bundle PEM file.

For the bundled Mozilla CA PEM file the following applies:
This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at

The Mozilla::CA distribution itself is available under the same license.

2021-05-24 perl v5.34.0