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#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - unsuspendmysqlusers                       Copyright 2011 cPanel, Inc.
#                                                           All rights Reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::unsuspendmysqlusers;

use strict;
use warnings;

use Cpanel::DB::Map::Reader                ();
use Cpanel::DB::Utils                      ();
use Cpanel::Mysql::Passwd                  ();
use Cpanel::MysqlUtils::Connect            ();
use Cpanel::MysqlUtils::Quote              ();
use Cpanel::MysqlUtils::Compat             ();
use Cpanel::MysqlUtils::Compat::Suspension ();
use Cpanel::MysqlUtils::Command            ();
use Cpanel::Logger                         ();
use Cpanel::MysqlUtils::Version            ();

if ( !caller() ) {

    my $user = shift @ARGV;

    if ( !$user ) {
        print "USAGE: $0 <user>\n";
        exit 1;
    }
    unsuspend($user);
}

sub unsuspend {
    my ($cpuser) = @_;
    my $logger = Cpanel::Logger->new();

    my $map = Cpanel::DB::Map::Reader->new( 'cpuser' => $cpuser, engine => 'mysql' );

    my @user_list = $map->get_dbusers_plus_cpses();

    # Case48428 - Need to include the parent user associated with the database and not just virtual users
    # when suspending accounts in MySQL.
    # Also, the DB map datastore might have a different owner name associated with the user
    # account which the databases are tied to.
    my @db_owner = (
        $cpuser,
        Cpanel::DB::Utils::username_to_dbowner($cpuser),
    );
    push @user_list, @db_owner;

    Cpanel::MysqlUtils::Connect::connect();

    # In order for the unsuspend code to work with account that have
    # been migrated from older versions of mysql/maria we need to
    # fixup the mysql users table to be in the expected state.
    #
    # Cpanel::MysqlUtils::Compat::Suspension::normalize_suspension will
    # convert the accounts that have the old style suspension system
    # to be locked if the server supports it.
    Cpanel::MysqlUtils::Compat::Suspension::normalize_suspension(
        Cpanel::MysqlUtils::Connect::get_singleton(),
    );

    my $row_name = Cpanel::MysqlUtils::Compat::get_mysql_user_auth_field();

    my $user_list = join ',', map { Cpanel::MysqlUtils::Quote::quote($_) } @user_list;
    my $result    = Cpanel::MysqlUtils::Command::sqlcmd("SELECT User, Host, $row_name from mysql.user WHERE user IN ($user_list);") || '';
    my @lines     = split /\n/, $result;
    my %result;
    foreach my $line (@lines) {
        my ( $key, $host, $value ) = split /\s+/, $line, 3;
        $result{$key}{$host} = $value || '*' x 41;
    }

    my $mysql = Cpanel::Mysql::Passwd->new( { cpuser => $cpuser } );

    foreach my $user ( keys %result ) {
        foreach my $host ( keys %{ $result{$user} } ) {
            if ( length( $result{$user}{$host} ) == 41 ) {

                # New style suspension
                if ( $result{$user}{$host} =~ m/^\-/ ) {
                    $result{$user}{$host} =~ s/\-//;

                    # Handling for NULL passwords
                    if ( $result{$user}{$host} =~ m/^\*+$/ ) {
                        $logger->info("MySQL user $user has a blank password!");
                        $result{$user}{$host} = '';
                    }
                    else {
                        $result{$user}{$host} = reverse $result{$user}{$host};
                        $result{$user}{$host} = '*' . $result{$user}{$host};
                    }
                }

                # Legacy suspension
                elsif ( $result{$user}{$host} =~ m/^\+/ ) {
                    $result{$user}{$host} =~ s/\+/\*/;
                }

                # Old passwords passed with new length
                elsif ( $result{$user}{$host} =~ m/^!+([0-9a-f]{16})$/ ) {
                    $result{$user}{$host} = reverse($1);
                }
            }
            elsif ( length( $result{$user}{$host} ) == 40 ) {
                $result{$user}{$host} = '*' . $result{$user}{$host};
                if ( $result{$user}{$host} =~ m/^\*+$/ ) {
                    $result{$user}{$host} = '';
                }
            }
            else {    # Case 76857
                $result{$user}{$host} =~ s/^!([0-9a-f]{16})/reverse($1)/e;
            }
        }
    }

    my @sql_cmds;

    foreach my $user ( keys %result ) {
        foreach my $host ( keys %{ $result{$user} } ) {
            my $pass = $result{$user}{$host};

            my $mysql_version = _long_mysql_version_or_default();

            # Per docs on MySQL 5.7.6 - https://dev.mysql.com/doc/refman/5.7/en/grant.html
            # We can no longer use GRANT statements to change the password.
            # However, since 5.7 ships with Account Locking capabilities, we will utilize that instead to lock the accounts.
            if ( Cpanel::MysqlUtils::Version::is_at_least( $mysql_version, '5.7.6' )
                && !Cpanel::MysqlUtils::Version::is_at_least( $mysql_version, '10.0.0' ) ) {

                push @sql_cmds, 'ALTER USER ' . Cpanel::MysqlUtils::Quote::quote($user) . '@' . Cpanel::MysqlUtils::Quote::quote($host) . ' ACCOUNT UNLOCK;';

            }
            else {
                # Passing in 1 to specify a password change
                $mysql->passwduser_hash( $user => $pass, 1 );
            }
        }
    }

    push @sql_cmds, 'FLUSH PRIVILEGES';

    # This must be done in the foreground or pkgacct will break.
    Cpanel::MysqlUtils::Command::sqlcmd( \@sql_cmds );

    return 1;

}

sub _long_mysql_version_or_default {
    local $@;
    my $long_version = eval { Cpanel::MysqlUtils::Version::current_mysql_version()->{'long'} };

    if ($@) {

        # current_mysql_version has extensive logic to determine the current
        # version.  If it fails, MySQL is likely beyond repair and we need to reinstall.
        return $Cpanel::MysqlUtils::Version::DEFAULT_MYSQL_RELEASE_TO_ASSUME_IS_INSTALLED;
    }

    return $long_version;
}

1;

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