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

# cpanel - scripts/convert_accesshash_to_token      Copyright 2019 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::Basename ();
use Getopt::Long   ();

use Cpanel::Rand::Get                                   ();
use Cpanel::ResellerFunctions                           ();
use Cpanel::SafeFile                                    ();
use Cpanel::ConfigFiles                                 ();
use Cpanel::Security::Authn::APITokens::Write::whostmgr ();
use Whostmgr::AccessHash                                ();

use Digest::SHA ();

exit _main(@ARGV) unless caller;

sub _main {
    my @args = @_;

    unless ( $> == 0 && $< == 0 ) {
        return bail_out('error: This program can only be run by root!');
    }

    Getopt::Long::GetOptionsFromArray(
        \@args,
        'help|?'  => \my $print_help,
        'verbose' => \my $verbose,

        'all-resellers' => \my $all_resellers,
    ) || return bail_out('Invalid usage. See --help');

    return print_help() if $print_help;

    $ENV{'REMOTE_USER'} = 'root';

    my @users = @args;
    @users = Cpanel::ResellerFunctions::getresellerslist() if $all_resellers;
    @users = ( $ENV{'REMOTE_USER'} ) if !@users;

    foreach my $user (@users) {
        my $details = eval { import_accesshash($user) };
        if ($@) {
            next if $@ =~ m/^No accesshash exists for/;
            print STDERR "error: $user: $@";
        }
        elsif ($verbose) {
            print "Imported accesshash for “$user” as “$details->{name}”\n";
        }
    }

    return 0;
}

sub _update_accounting_log {
    my ( $action, $token_name ) = @_;

    my $acctlog = Cpanel::SafeFile::safeopen( my $accounting_log_fh, '>>', $Cpanel::ConfigFiles::ACCOUNTING_LOG_FILE );
    if ( !$acctlog ) {
        logger->warn("Could not write to /var/cpanel/accounting.log");
    }
    else {
        chmod 0600, $Cpanel::ConfigFiles::ACCOUNTING_LOG_FILE;

        # The accounting log format is:
        # <time>:<action keyword>:<remote user>:<user>:<domain>:<other items particular to the action>
        # We are using "not-applicable" for the domain since it isn't really necessary here.
        print $accounting_log_fh localtime() . ":$action:$ENV{'REMOTE_USER'}:$ENV{'REMOTE_USER'}:not-applicable:$token_name\n";
        Cpanel::SafeFile::safeclose( $accounting_log_fh, $acctlog );
    }
    return 1;
}

sub import_accesshash {
    my ($user) = @_;

    my ( $status, $msg, $accesshash ) = Whostmgr::AccessHash::get_access_hash($user);
    die "$msg\n" if !$status;
    $accesshash =~ s/\s//g;
    my $token_hash = Digest::SHA::sha512_hex($accesshash);

    my $data_obj = Cpanel::Security::Authn::APITokens::Write::whostmgr->new( { user => $user } );

    my $count    = 0;
    my $suffix   = '';
    my $basename = "accesshash-" . time;
    my $token_details;
    while ( !$token_details ) {
        die "Cannot import accesshash: $@" if ++$count > 25;

        $token_details = eval {
            $data_obj->import_token_hash(
                {
                    name       => "$basename$suffix",
                    token_hash => $token_hash,
                }
            );
        };

        # TODO: Why no error report here?

        $suffix = "-" . Cpanel::Rand::Get::getranddata( 8, [ 0 .. 9, 'A' .. 'Z' ] );
    }
    $data_obj->save_changes_to_disk();

    _update_accounting_log( "CREATEAPITOKEN", "$basename$suffix" );

    return $token_details;
}

sub print_help {
    my $basename = File::Basename::basename($0);
    print <<HELP;
Usage: $basename [OPTIONS] [reseller ...]

Options:
   -?, --help           Display this message
   --verbose            Print all of the tokens generated

   --all-resellers      Process all reseller users
HELP
    return 0;
}

sub bail_out {
    my $error_msg = shift;
    print STDERR $error_msg . "\n\n" if $error_msg;

    print_help();
    return 1;
}