ZipSlipVulnerabilityTest.php

<?php

declare(strict_types=1);

/*
 * This file is part of the nelexa/zip package.
 * (c) Ne-Lexa <https://github.com/Ne-Lexa/php-zip>
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace PhpZip\Tests;

use PhpZip\Exception\ZipException;
use PhpZip\ZipFile;

/**
 * Class ZipSlipVulnerabilityTest.
 *
 * @see https://github.com/Ne-Lexa/php-zip/issues/39 Issue#31
 * @see https://snyk.io/research/zip-slip-vulnerability Zip Slip Vulnerability
 *
 * @internal
 *
 * @small
 */
class ZipSlipVulnerabilityTest extends ZipTestCase
{
    /**
     * @throws ZipException
     */
    public function testCreateSlipVulnerabilityFile(): void
    {
        $localFile = '../dir/./../../file.txt';
        $zipFile = new ZipFile();
        $zipFile->addFromString($localFile, 'contents');
        static::assertContains($localFile, $zipFile->getListFiles());
        $zipFile->close();
    }

    /**
     * @throws ZipException
     */
    public function testUnpack(): void
    {
        static::assertTrue(mkdir($this->outputDirname, 0755, true));

        $zipFile = new ZipFile();
        $zipFile->addFromString('../dir/./../../file.txt', 'contents');
        $zipFile->extractTo($this->outputDirname);
        $zipFile->close();

        $expectedExtractedFile = $this->outputDirname . '/dir/file.txt';
        static::assertTrue(is_file($expectedExtractedFile));
    }
}