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

# cpanel - scripts/setpostgresconfig                  Copyright 2013 cPanel, Inc.
#                                                            All rights Reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

#----------------------------------------------------------------------
# XXX XXX IMPORTANT!! XXX XXX
#
# This modulino is loaded and run as a module in at least one place.
# Do NOT add exit() to this code!
#----------------------------------------------------------------------

package scripts::setpostgresconfig;

use strict;
use warnings;

use Whostmgr::Postgres                 ();
use Cpanel::PwCache                    ();
use Cpanel::FileUtils::TouchFile       ();
use Cpanel::PostgresAdmin              ();
use Cpanel::PostgresUtils              ();
use Cpanel::PostgresUtils::PgPass      ();
use Cpanel::Postgres::Connect          ();    # PPI USE OK -- This binary always needs to so ok perlcc ahead of time
use Cpanel::DB::Map::Collection::Index ();
use Cpanel::Usage                      ();
use Cpanel::SafeFile                   ();

exit( run(@ARGV) ) unless caller();

my $dryrun  = 0;
my $force   = 0;
my $verbose = 0;

sub run {
    my (@argv) = @_;

    my $dryrun  = 0;
    my $force   = 0;
    my $verbose = 0;

    my %opts = (
        'dryrun'  => \$dryrun,
        'dry-run' => \$dryrun,
        'force'   => \$force,
        'verbose' => \$verbose,
    );

    # ==== init process options
    Cpanel::Usage::wrap_options( \@argv, \&usage, \%opts );
    $verbose = 1 if $dryrun;

    my $setup = scripts::setpostgresconfig->new( dryrun => $dryrun, force => $force, verbose => $verbose );

    return $setup->check() ? 0 : 1;
}

sub new {
    my ( $class, %opts ) = @_;

    return bless {%opts}, $class;
}

sub check {
    my $self = shift;

    my @actions = qw{check_prerequires};
    push @actions, 'check_first_upgrade' unless $self->{force};
    push @actions, qw{update_config fix_users add_lock};

    foreach my $action (@actions) {
        $self->msg("running action $action") if $self->{dryrun};
        my $status = $self->$action();
        return $status unless $status && $status == 1;
    }

    return 1;
}

sub check_prerequires {
    my $self = shift;

    return $self->by("Cannot find postgres version.") unless Whostmgr::Postgres::get_version();
    return $self->by("Cannot find pgsql_data dir.")   unless Cpanel::PostgresUtils::find_pgsql_data();

    if ( $self->{force} && !-e _pg_hba_file() ) {
        my $pg_hba = _pg_hba_file();
        Cpanel::FileUtils::TouchFile::touchfile($pg_hba);
        my $user = Cpanel::PostgresUtils::PgPass::getpostgresuser();
        my ( $uid, $gid ) = ( Cpanel::PwCache::getpwnam($user) )[ 2, 3 ];

        # If we change the uid/gid on the file we need to update Whostmgr::Postgres::update_config
        chown( $uid, $gid, $pg_hba ) or warn "Failed to chown($uid,$gid,$pg_hba): $!";

        # If we change the mode on the file we need to update Whostmgr::Postgres::update_config
        chmod( 0600, $pg_hba ) or warn "Failed to chmod(0600,$pg_hba): $!";

    }

    return $self->by("Cannot find pg_hba.conf.") unless -e _pg_hba_file();

    return 1;
}

sub check_first_upgrade {
    my $self = shift;

    my $cfg;
    my $lock = Cpanel::SafeFile::safeopen( $cfg, '<', _pg_hba_file() );
    return $self->by("cannot read config file") unless $lock;
    my $ok = grep { /^\s*local\s+samerole\s+all/ } (<$cfg>);
    Cpanel::SafeFile::safeclose( $cfg, $lock );
    if ($ok) {
        $self->msg("Nothing todo, configuration looks fine.");

        # solve problem with users having already upgraded to 11.36.1 without the lock file
        $self->add_lock();
        return -1;
    }
    return $self->by("Warning: pg_hba.conf was secured but entries have been removed ( you can run it with --force ).") if !$self->{force} && -e _version_file();

    return 1;
}

sub add_lock {
    return Cpanel::FileUtils::TouchFile::touchfile( _version_file() );
}

sub _version_file {
    return '/var/cpanel/version/pg_hba_conf_secured';
}

sub _pg_hba_file {
    return join( '/', Cpanel::PostgresUtils::find_pgsql_data(), 'pg_hba.conf' );
}

sub usage {
    my $prog = $0;
    $prog =~ s{^.+/(.+)$}{$1};
    print <<EOF;
$prog [options] [ -f FILE ]

This script will improve postgres security :
    - update pg_hba.conf
    - create role foreach database
    - grant users to roles

Modifiers Flags:

    --force     - force to update config.
    --verbose   - display some friendly verbose messages.
    --dry-run   - do nothing and display some verbose messages.
    --help      - dislay this help message and exit.
EOF
    exit;

}

sub update_config {
    my $self = shift;

    my $dryrun = $self->{dryrun};

    $self->msg( "-", $dryrun ? 'will' : '', "update postgres configuration" );
    $self->msg("\tnothing done [dryrun]") and return if $dryrun;
    my ( $status, $message ) = Whostmgr::Postgres::update_config();
    $self->by("Cannot update postgres config") unless $status;
    $self->msg($message) if $message;
    return Whostmgr::Postgres::reload();
}

sub fix_users {
    my $self = shift;

    my $postgresadmin = Cpanel::PostgresAdmin->new( { 'cpuser' => 'root' } );

    return 0 if !$postgresadmin;

    my @id_dbs = $postgresadmin->getalldbids();
    return -1 unless $id_dbs[0] && ref $id_dbs[0] eq ref {};
    my @dbs = grep { $_ ne 'template0' } values %{ $id_dbs[0] };

    $postgresadmin->setupdbrole( \@dbs );

    my $pg_dbindex = Cpanel::DB::Map::Collection::Index->new( { 'db' => 'PGSQL' } );

    my %owners;
    foreach my $db (@dbs) {
        my $owner = $pg_dbindex->get_dbuser_by_db($db);
        next unless $owner;
        $owners{$owner} = 1;
    }

    foreach my $owner ( keys %owners ) {
        local $postgresadmin->{'cpuser'} = $owner;
        $postgresadmin->clear_map();

        my %dbusers = $postgresadmin->listusersindb();

        foreach my $db ( keys %dbusers ) {
            foreach my $user ( @{ $dbusers{$db} } ) {
                $self->msg( '-', $dryrun ? 'will' : '', 'repair access to', $db, 'for user', $user );
                next if $dryrun;
                $postgresadmin->addusertodb( $db, $user, 1 );
            }
        }
    }
    return 1;
}

sub msg {
    my ( $self, @msg ) = @_;
    print join( ' ', @msg, "\n" ) if $self->{verbose};
    return;
}

sub by {
    my ( $self, @msg ) = @_;
    $self->msg(@msg);
    return;
}

1;
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