Mini Shell

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

# cpanel - scripts/securerailsapps                 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 File::Find;
use Cpanel::PwCache                     ();
use Cpanel::PwCache::Build              ();
use Cpanel::AccessIds::SetUids          ();
use Cpanel::Usage                       ();
use Cpanel::ConfigFiles                 ();
use Cpanel::Config::userdata::Constants ();

my $user = '';
my $all  = 0;

my %opts = (
    'user' => \$user,
    'all'  => \$all,
);

Cpanel::Usage::wrap_options( \@ARGV, \&usage, \%opts );

if ($user) {
    if ( !-e "$Cpanel::ConfigFiles::cpanel_users/$user" ) {
        print STDERR "User $user not found...\n";
        exit 1;
    }
    my $homedir = ( Cpanel::PwCache::getpwnam($user) )[7];
    if ( !$homedir ) {
        print STDERR "Invalid user $user\n";
        exit 1;
    }

    if ( my $pid = fork() ) {
        waitpid( $pid, 0 );
    }
    else {
        Cpanel::AccessIds::SetUids::setuids( $user, $user );
        secure_rails_dirs( $user, $homedir );
        exit;
    }
}
elsif ($all) {
    Cpanel::PwCache::Build::init_passwdless_pwcache();
    opendir( my $dir_h, $Cpanel::ConfigFiles::cpanel_users ) or die "Failed to read cPanel users directory: $!";
    my @files = grep { !/^\.\.?$/ } readdir($dir_h);
    close($dir_h);
    chomp(@files);
    foreach my $user (@files) {
        my $homedir = ( Cpanel::PwCache::getpwnam($user) )[7];
        next if !$homedir;
        print "Securing rails apps for: $user\n";
        if ( my $pid = fork() ) {
            waitpid( $pid, 0 );
        }
        else {
            Cpanel::AccessIds::SetUids::setuids( $user, $user );
            secure_rails_dirs( $user, $homedir );
            exit;
        }
    }
}
else {
    usage();
}

sub secure_rails_dirs {
    my ( $user, $homedir ) = @_;
    my @rails_dirs;
    File::Find::find(
        {
            'wanted' => sub {
                if ( $File::Find::name =~ /boot\.rb$/ ) {
                    $File::Find::name =~ s{config/boot\.rb}{};
                    push @rails_dirs, $File::Find::name;
                }
            },
            'no_chdir' => 1,
            'untaint'  => 1,
        },
        $homedir
    );

    foreach my $rails_dir (@rails_dirs) {
        foreach my $dir (qw<app config db doc lib script test tmp vendor>) {
            my $htaccess_file = "$rails_dir/$dir/.htaccess";
            ($htaccess_file) = $htaccess_file =~ /^(.*)$/;
            if ( !-e $htaccess_file ) {
                if ( open( my $fh, '>', $htaccess_file ) ) {
                    print {$fh} htaccess();
                    close($fh);
                }
            }
        }
    }
}

sub htaccess {
    return <<'EOF';
<Limit GET POST OPTIONS PROPFIND>
    Order allow,deny
    Deny from all
</Limit>
EOF
}

sub move_yaml_files {
    my ( $user, $home ) = @_;
    if ( -e "$home/.cpanel/ruby-on-rails.db" ) {
        system( 'mv', "$home/.cpanel/ruby-on-rails.db", "$Cpanel::Config::userdata::Constants::USERDATA_DIR/$user/ruby-on-rails" );
    }

    if ( -e "$home/.cpanel/ruby-on-rails-rewrites.db" ) {
        system( 'mv', "$home/.cpanel/ruby-on-rails-rewrites.db", "$Cpanel::Config::userdata::Constants::USERDATA_DIR/$user/ruby-on-rails-rewrites" );
    }
    return;
}

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

EOF
    exit(0);
}