diff options
Diffstat (limited to 'Q3.php')
| -rw-r--r-- | Q3.php | 289 |
1 files changed, 289 insertions, 0 deletions
@@ -0,0 +1,289 @@ +<?php + +declare(strict_types=1); + +function parse(string $data): array { + $lines = explode("\n", trim($data)); + return [ + base64_decode(implode(array_slice($lines, 0, -6))), + array_combine( + array_map(base64_decode(...), array_slice($lines, -6, 3)), + array_map(base64_decode(...), array_slice($lines, -3, 3)), + ), + ]; +} + +function stretch(string $source): string { + $x = ''; + $y = ''; + $z = true; + for ($i = 0; $i < strlen($source); $i++) { + if ($i % 3 === 2) { + $y .= $source[$i] ^ '_'; + $x .= '_'; + $z = !$z; + } else if ($i % 2 === ($z?0:1)) { + $y .= $source[$i] ^ "\n"; + $x .= "\n"; + } else { + $y .= "\n"; + $x .= $source[$i] ^ "\n"; + } + } + $result = ''; + $result .= "'$x"; + $result .= match (strlen($x) % 3) { + 0 => "\n'^", + 1 => "'^", + 2 => "'\n^\043", + }; + $result .= "\n'$y"; + $result .= match (strlen($y) % 3) { + 0 => "'", + 1 => "\n'\043", + 2 => "'\043", + }; + return $result; +} + +function convert(string $file_path, string $template, array $replacements): void { + if (str_ends_with($file_path, '.blade.php')) return; + if (str_ends_with($file_path, '.html.php')) return; + if (str_ends_with($file_path, '.svg.php')) return; + + $file_content = file_get_contents($file_path); + assert($file_content !== false); + if (!str_starts_with($file_content, "\043!") && !str_starts_with($file_content, '<?')) + return; + + $php_source = str_replace( + '2023', + stretch(bin2hex(strtr($file_content, $replacements))), + $template, + ); + rename($file_path, "{$file_path}.erkaigi.bak"); + file_put_contents($file_path, $php_source); +} + +function verify(string $s): bool { + $len = strlen($s); + if ($len % 3 !== 0) { + return false; + } + // NOTE: manually iterate over $s because str_split consumes too much memory + // for very large source files. + for ($i = 0; $i < $len/3; $i++) { + $a = $s[3*$i + 0]; + $b = $s[3*$i + 1]; + $c = $s[3*$i + 2]; + if ( + $a === "\n" || $a === "\r" || $a === " " || $a === "\t" || + $b === "\n" || $b === "\r" || $b === " " || $b === "\t" || + $c !== "\n" + ) { + return false; + } + } + return true; +} + +function cmd_convert(string $repo_dir): void { + $fp = fopen(__FILE__, 'r'); + fseek($fp, __COMPILER_HALT_OFFSET__); + $data = stream_get_contents($fp); + fclose($fp); + [$template, $replacements] = parse($data); + + $iter = new RecursiveDirectoryIterator($repo_dir, RecursiveDirectoryIterator::CURRENT_AS_PATHNAME); + $iter = new RecursiveIteratorIterator($iter); + $iter = new RegexIterator($iter, '|\.php$|'); + + convert("{$repo_dir}/artisan", $template, $replacements); + foreach ($iter as $file_path) { + convert($file_path, $template, $replacements); + } +} + +function cmd_revert(string $repo_dir): void { + $iter = new RecursiveDirectoryIterator($repo_dir, RecursiveDirectoryIterator::CURRENT_AS_PATHNAME); + $iter = new RecursiveIteratorIterator($iter); + $iter = new RegexIterator($iter, '|\.erkaigi\.bak$|'); + + foreach ($iter as $path) { + rename($path, str_replace('.erkaigi.bak', '', $path)); + } +} + +function cmd_verify(string $repo_dir): void { + $iter = new RecursiveDirectoryIterator($repo_dir, RecursiveDirectoryIterator::CURRENT_AS_PATHNAME); + $iter = new RecursiveIteratorIterator($iter); + $iter = new RegexIterator($iter, '|\.erkaigi\.bak$|'); + + foreach ($iter as $backup_file_path) { + $compiled_file_path = str_replace('.erkaigi.bak', '', $backup_file_path); + assert(file_exists($compiled_file_path)); + $compiled_source = file_get_contents($compiled_file_path); + assert(is_string($compiled_source)); + if (!verify($compiled_source)) { + fwrite(STDERR, "'{$compiled_file_path}' is invalid.\n"); + exit(1); + } + } +} + +function cmd_help(): void { + echo <<<'EOS' + Usage: php Q3.php <subcommand> + + Subcommands: + convert Stretch Laravel sources. + revert Revert changes. + verify Check if all sources are stretched. + help Show this help. + + Local: + 1. Install PHP 8.2.1. + 2. Install Composer. + 3. git clone --depth=1 --branch=v9.5.0 https://github.com/laravel/laravel.git + 4. cp -f Q3.composer.json laravel/composer.json + 5. cp -f Q3.composer.lock laravel/composer.lock + 6. cd laravel + 7. composer install --prefer-dist --no-dev + 8. cp -f .env.example .env + 9. php artisan key:generate --ansi + 10. php artisan serve + 11. Access http://localhost:8000. This "warm-up" is needed for some reason. + 12. php ../Q3.php convert . + 13. php -d ffi.enable=1 -d opcache.enable=0 -d short_open_tag=1 artisan serve + + Docker: + 1. Install Docker. + 2. docker build -f Q3.Dockerfile --tag=phperkaigi-2023-q3 . + 3. docker run --rm -it -p 8000:8000 phperkaigi-2023-q3 bash + 4. cd laravel + 5. php artisan serve --host=0.0.0.0 --port=8000 + 6. Access http://localhost:8000. This "warm-up" is needed for some reason. + 7. php ../Q3.php convert . + 8. php -d ffi.enable=1 -d opcache.enable=0 -d short_open_tag=1 artisan serve --host=0.0.0.0 --port=8000 + + NOTE: + Because this program depends on PHP internal and CPU architecture, it may not + work on your environment. If so, please read this source code and find + the embedded token. + + EOS; +} + +if (PHP_VERSION !== '8.2.1') { + fputs(STDERR, "This program supports only PHP 8.2.1.\n"); +} +if (!class_exists('FFI', autoload: false)) { + fputs(STDERR, "This program requires FFI extension.\n"); +} + +$cmd = $argv[1] ?? 'help'; +$repo_dir = $argv[2] ?? 'laravel'; + +match ($cmd) { + 'convert' => cmd_convert($repo_dir), + 'revert' => cmd_revert($repo_dir), + 'verify' => cmd_verify($repo_dir), + 'help' => cmd_help(), + default => cmd_help(), +}; +__halt_compiler(); +PD8KJHEKPSEKMTsKJGMKPScKRSEKXiEKXicKXiMKJ0kKb1kKYEQKJzsKJGgKPScKTyEKSCEKJ14K +J0IKeTgKaEQKJzsKaWYKKCMKJGMKKCcKQiEKUCEKJ14KJ1oKcVUKdVkKJykKKXsKKCcKWiEKWScK +XiMKJ0wKdF4KJykKKCMKJGMKKCcKXiEKWCEKJ14KJ1kKZU8KcycKKSwKJGgKKCcKPl8KPF8KOV8K +PV8KOF8KPF8KOF8KPCEKOl8KPCEKP18KOF8KT18KPV8KOl8KPV8KOl8KPCEKOF8KOF8KO18KPyEK +Pl8KOCEKP18KPF8KOF8KPF8KPl8KPF8KP18KPCEKPl8KOiEKJ14KJz8KaTIKZj0KbToKbz0KaUwK +aD0KaTsKZTgKaT4KZzwKaDkKbzwKaUwKazgKaDkKaj0KaDoKZz0KaD4KbzwKbToKYD8KajkKZTwK +aU8KbjwKaUkKajwKbToKbT0KaTMKYjwKbU8KYCcKKSkKOyMKJHEKPSEKMDsKfSMKaWYKKCEKJHEK +JiYKJGMKKCcKQiEKTiEKXyEKJ14KJ1oKcVUKZEgKZicKKSkKeygKJ0wKdF4KJ14KKCcKWiEKWScK +KSkKKCMKJGMKKCcKXiEKWCEKJ14KJ1kKZU8KcycKKSwKJGgKKCcKPl8KPF8KOV8KPV8KOF8KPF8K +OF8KPCEKOl8KPCEKP18KOF8KT18KPV8KOl8KPV8KOl8KPCEKOF8KOF8KO18KPF8KP18KPV8KPV8K 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