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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - bin/spf_installer                       Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

use strict;
use warnings;

use Cpanel::SPF                 ();
use Cpanel::AcctUtils::Account  ();
use Cpanel::Config::CpUserGuard ();

# Since SPF mechanisms can be prefixed with + or -, they can be interpreted as
# options and extracted from the arguments by Getopt::Long::GetOptions*().
# Configure Getopt::Long so these values pass through and remain in the args.
# Additionally, require the full option to avoid accidentally interpreting a
# mechanism as the short version of an option.
use Getopt::Long qw(:config pass_through no_auto_abbrev);

use strict;

exit _main(@ARGV) unless caller;

sub _main {
    my (@args) = @_;

    Getopt::Long::GetOptionsFromArray(
        \@args,
        'help|usage' => \my $printHelp,
    );

    if ($printHelp) {
        printHelp();
        return 0;
    }

    my $user = $args[0];

    if ( !length $user ) {
        print qq{Error: You must provide a user name.\n\n};
        printHelp();
        return 1;
    }
    elsif ( $user eq 'system' ) {
        print qq{Error: You cannot setup SPF for the “system” user.\n\n};
        printHelp();
        return 1;
    }
    elsif ( !Cpanel::AcctUtils::Account::accountexists($user) ) {
        print qq{Error: User “$user” does not exist.\n\n};
        printHelp();
        return 1;
    }

    my $cpuser_guard = Cpanel::Config::CpUserGuard->new($user);
    my $cpuser_data  = $cpuser_guard->{'data'};
    $cpuser_data->{'HASSPF'} = 1;
    $cpuser_guard->save();

    my ( $status, $msg ) = Cpanel::SPF::setup_spf( 'user' => $user, 'spf_keys' => $args[1], 'is_complete' => $args[2], 'overwrite' => $args[3], 'preserve' => $args[4] );
    unless ($status) {
        $msg ||= 'Failed to set up SPF for this user.';
        print STDERR "$msg\n";
        return 1;
    }

    return 0;
}

sub printHelp {
    print <<HELP;
Usage: $0 <user> [policy [is-complete [overwrite [preserve]]]]

Installs an SPF policy in TXT records for the given user's domains.

Note: The following will be prepended to the policy: +a +mx +ip4:<main-IP>.

Options:
    <user>      User whose domains will receive the SPF record.

    <policy>
                Comma delimited list of SPF mechanisms to include in the
                policy, e.g:
                '+ip4:192.0.2.0/24,-ip4:203.0.113.5,+ip6:2001:db8:1a34::/64'.
                Default: ""

    <is-complete>
                Indicates whether the policy represents a complete record,
                that is, whether it should terminate with "-all".  Use "1"
                to indicate that it is; otherwise, use "0".  Default: "0"

    <overwrite>
                Indicates whether all SPF records should be overwritten for
                the user.  If not, only select records will be replaced; see
                Overwrite.  Use "1" to indicate that it should; otherwise,
                use "0".  Default: "0"

    <preserve>
                Indicates that existing mechanisms should be retained from the
                current SPF record for the domain.  Use "1" to indicate that
                they should be kept; otherwise, use "0".  Default: "0"

Overwrite

When this script is run, the zone file for the domain is inspected and the
first SPF record that is found (generally, the main domain) is recorded.  Any
other subdomains that have an identical SPF record to this one are replaced.
If <overwrite> is "1", then all SPF records, regardless of whether their
content matches the first record, are replaced.

HELP
    return;
}
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