weakpassword.php

<?php
 
namespace Bitrix\Main\Authentication\Policy;
 
use Bitrix\Main\IO;
 
class WeakPassword
{
    public const MIN_PASSWORD_LENGTH = 6;
 
    public static function createIndex(string $dataFile, string $path): bool
    {
        $file = new IO\File($dataFile);
 
        $passwords = $file->getContents();
 
        $passwords = str_replace(["\r\n", "\r"], "\n", $passwords);
        $passwords = explode("\n", $passwords);
 
        $hashedPasswords = [];
        foreach ($passwords as $password)
        {
            if (strlen($password) >= self::MIN_PASSWORD_LENGTH)
            {
                $hash = md5($password);
                $name = $hash[0] . $hash[1]; // 256 possible keys
                $hashedPasswords[$name][] = (string)$password;
            }
        }
        unset($passwords);
 
        foreach ($hashedPasswords as $name => $value)
        {
            // we need the first and the last \n as a search pattern separator
            $content = "\n" . implode("\n", $value) . "\n";
 
            $indexFile = new IO\File($path . '/' . $name . '.txt');
 
            if ($indexFile->putContents($content) === false)
            {
                return false;
            }
        }
 
        return true;
    }
 
    public static function exists(string $password, string $path): bool
    {
        $hash = md5($password);
        $name = $hash[0] . $hash[1];
 
        $indexFile = new IO\File($path . '/' . $name . '.txt');
 
        if (!$indexFile->isExists())
        {
            return false;
        }
 
        $passwords = $indexFile->getContents();
 
        return (strpos($passwords, "\n" . $password . "\n") !== false);
    }
}