121 lines
2.7 KiB
PHP
121 lines
2.7 KiB
PHP
<?php
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/**
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* Html2Pdf Library - Security
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*
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* HTML => PDF converter
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* distributed under the OSL-3.0 License
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*
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* @package Html2pdf
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* @author Laurent MINGUET <webmaster@html2pdf.fr>
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* @copyright 2025 Laurent MINGUET
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*/
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namespace Spipu\Html2Pdf\Security;
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use Spipu\Html2Pdf\Exception\HtmlParsingException;
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class Security implements SecurityInterface
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{
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/**
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* @var string[]
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*/
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protected $allowedSchemes = ['file', 'http', 'https'];
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/**
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* @var string[]
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*/
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protected $allowedHosts = [];
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/**
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* @var bool
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*/
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private $checkAllowedHosts = true;
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/**
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* @param string $path
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* @return void
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* @throws HtmlParsingException
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*/
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public function checkValidPath(string $path): void
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{
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$path = trim(strtolower($path));
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if (!$this->checkValidPathScheme($path)) {
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throw new HtmlParsingException('Unauthorized path scheme');
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}
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if ($this->checkAllowedHosts && !$this->checkValidPathHost($path)) {
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throw new HtmlParsingException('Unauthorized path host on ' . $path . ' => ' . implode('|', $this->allowedHosts));
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}
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}
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/**
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* @param string $path
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* @return bool
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*/
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private function checkValidPathScheme(string $path): bool
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{
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$scheme = parse_url($path, PHP_URL_SCHEME);
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if ($scheme === null) {
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return true;
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}
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if (in_array($scheme, $this->allowedSchemes)) {
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return true;
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}
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// for local file on windows
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if (strlen($scheme) === 1 && preg_match('/^[a-z]$/i', $scheme)) {
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return true;
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}
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return false;
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}
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/**
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* @param string $path
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* @return bool
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*/
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private function checkValidPathHost(string $path): bool
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{
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$scheme = parse_url($path, PHP_URL_SCHEME);
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$host = parse_url($path, PHP_URL_HOST);
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// If it is a local file => no host
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if (
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$scheme === null
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|| $scheme === 'file'
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|| (strlen($scheme) === 1 && preg_match('/^[a-z]$/i', $scheme))
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) {
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return true;
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}
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return in_array($host, $this->allowedHosts);
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}
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/**
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* @param string $host
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* @return void
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*/
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public function addAllowedHost(string $host): void
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{
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$host = trim(strtolower($host));
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if (!in_array($host, $this->allowedHosts)) {
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$this->allowedHosts[] = $host;
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}
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}
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/**
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* @return void
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*/
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public function resetAllowedHosts(): void
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{
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$this->allowedHosts = [];
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}
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/**
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* @return void
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*/
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public function disableCheckAllowedHosts(): void
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{
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$this->checkAllowedHosts = false;
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}
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}
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