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257 lines
9.3 KiB
PHP
257 lines
9.3 KiB
PHP
<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Util;
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use Composer\Composer;
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use Composer\CaBundle\CaBundle;
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use Composer\Downloader\TransportException;
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use Composer\Repository\PlatformRepository;
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use Composer\Util\Http\ProxyManager;
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use Psr\Log\LoggerInterface;
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/**
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* Allows the creation of a basic context supporting http proxy
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*
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* @author Jordan Alliot <jordan.alliot@gmail.com>
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* @author Markus Tacker <m@coderbyheart.de>
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*/
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final class StreamContextFactory
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{
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/**
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* Creates a context supporting HTTP proxies
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*
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* @param string $url URL the context is to be used for
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* @phpstan-param array{http?: array{follow_location?: int, max_redirects?: int, header?: string|array<string>}} $defaultOptions
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* @param mixed[] $defaultOptions Options to merge with the default
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* @param mixed[] $defaultParams Parameters to specify on the context
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* @throws \RuntimeException if https proxy required and OpenSSL uninstalled
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* @return resource Default context
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*/
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public static function getContext($url, array $defaultOptions = array(), array $defaultParams = array())
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{
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$options = array('http' => array(
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// specify defaults again to try and work better with curlwrappers enabled
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'follow_location' => 1,
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'max_redirects' => 20,
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));
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$options = array_replace_recursive($options, self::initOptions($url, $defaultOptions));
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unset($defaultOptions['http']['header']);
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$options = array_replace_recursive($options, $defaultOptions);
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if (isset($options['http']['header'])) {
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$options['http']['header'] = self::fixHttpHeaderField($options['http']['header']);
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}
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return stream_context_create($options, $defaultParams);
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}
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/**
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* @param string $url
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* @param mixed[] $options
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* @param bool $forCurl When true, will not add proxy values as these are handled separately
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* @phpstan-return array{http: array{header: string[], proxy?: string, request_fulluri: bool}, ssl?: mixed[]}
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* @return array formatted as a stream context array
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*/
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public static function initOptions($url, array $options, $forCurl = false)
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{
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// Make sure the headers are in an array form
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if (!isset($options['http']['header'])) {
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$options['http']['header'] = array();
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}
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if (is_string($options['http']['header'])) {
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$options['http']['header'] = explode("\r\n", $options['http']['header']);
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}
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// Add stream proxy options if there is a proxy
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if (!$forCurl) {
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$proxy = ProxyManager::getInstance()->getProxyForRequest($url);
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if ($proxyOptions = $proxy->getContextOptions()) {
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$isHttpsRequest = 0 === strpos($url, 'https://');
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if ($proxy->isSecure()) {
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if (!extension_loaded('openssl')) {
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throw new TransportException('You must enable the openssl extension to use a secure proxy.');
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}
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if ($isHttpsRequest) {
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throw new TransportException('You must enable the curl extension to make https requests through a secure proxy.');
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}
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} elseif ($isHttpsRequest && !extension_loaded('openssl')) {
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throw new TransportException('You must enable the openssl extension to make https requests through a proxy.');
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}
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// Header will be a Proxy-Authorization string or not set
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if (isset($proxyOptions['http']['header'])) {
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$options['http']['header'][] = $proxyOptions['http']['header'];
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unset($proxyOptions['http']['header']);
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}
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$options = array_replace_recursive($options, $proxyOptions);
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}
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}
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if (defined('HHVM_VERSION')) {
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$phpVersion = 'HHVM ' . HHVM_VERSION;
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} else {
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$phpVersion = 'PHP ' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '.' . PHP_RELEASE_VERSION;
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}
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if ($forCurl) {
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$curl = curl_version();
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$httpVersion = 'cURL '.$curl['version'];
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} else {
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$httpVersion = 'streams';
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}
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if (!isset($options['http']['header']) || false === stripos(implode('', $options['http']['header']), 'user-agent')) {
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$platformPhpVersion = PlatformRepository::getPlatformPhpVersion();
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$options['http']['header'][] = sprintf(
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'User-Agent: Composer/%s (%s; %s; %s; %s%s%s)',
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Composer::getVersion(),
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function_exists('php_uname') ? php_uname('s') : 'Unknown',
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function_exists('php_uname') ? php_uname('r') : 'Unknown',
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$phpVersion,
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$httpVersion,
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$platformPhpVersion ? '; Platform-PHP '.$platformPhpVersion : '',
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Platform::getEnv('CI') ? '; CI' : ''
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);
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}
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return $options;
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}
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/**
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* @param mixed[] $options
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*
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* @return mixed[]
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*/
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public static function getTlsDefaults(array $options, LoggerInterface $logger = null)
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{
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$ciphers = implode(':', array(
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'ECDHE-RSA-AES128-GCM-SHA256',
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'ECDHE-ECDSA-AES128-GCM-SHA256',
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'ECDHE-RSA-AES256-GCM-SHA384',
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'ECDHE-ECDSA-AES256-GCM-SHA384',
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'DHE-RSA-AES128-GCM-SHA256',
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'DHE-DSS-AES128-GCM-SHA256',
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'kEDH+AESGCM',
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'ECDHE-RSA-AES128-SHA256',
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'ECDHE-ECDSA-AES128-SHA256',
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'ECDHE-RSA-AES128-SHA',
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'ECDHE-ECDSA-AES128-SHA',
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'ECDHE-RSA-AES256-SHA384',
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'ECDHE-ECDSA-AES256-SHA384',
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'ECDHE-RSA-AES256-SHA',
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'ECDHE-ECDSA-AES256-SHA',
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'DHE-RSA-AES128-SHA256',
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'DHE-RSA-AES128-SHA',
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'DHE-DSS-AES128-SHA256',
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'DHE-RSA-AES256-SHA256',
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'DHE-DSS-AES256-SHA',
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'DHE-RSA-AES256-SHA',
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'AES128-GCM-SHA256',
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'AES256-GCM-SHA384',
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'AES128-SHA256',
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'AES256-SHA256',
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'AES128-SHA',
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'AES256-SHA',
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'AES',
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'CAMELLIA',
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'DES-CBC3-SHA',
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'!aNULL',
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'!eNULL',
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'!EXPORT',
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'!DES',
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'!RC4',
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'!MD5',
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'!PSK',
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'!aECDH',
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'!EDH-DSS-DES-CBC3-SHA',
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'!EDH-RSA-DES-CBC3-SHA',
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'!KRB5-DES-CBC3-SHA',
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));
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/**
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* CN_match and SNI_server_name are only known once a URL is passed.
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* They will be set in the getOptionsForUrl() method which receives a URL.
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*
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* cafile or capath can be overridden by passing in those options to constructor.
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*/
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$defaults = array(
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'ssl' => array(
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'ciphers' => $ciphers,
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'verify_peer' => true,
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'verify_depth' => 7,
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'SNI_enabled' => true,
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'capture_peer_cert' => true,
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),
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);
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if (isset($options['ssl'])) {
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$defaults['ssl'] = array_replace_recursive($defaults['ssl'], $options['ssl']);
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}
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/**
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* Attempt to find a local cafile or throw an exception if none pre-set
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* The user may go download one if this occurs.
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*/
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if (!isset($defaults['ssl']['cafile']) && !isset($defaults['ssl']['capath'])) {
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$result = CaBundle::getSystemCaRootBundlePath($logger);
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if (is_dir($result)) {
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$defaults['ssl']['capath'] = $result;
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} else {
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$defaults['ssl']['cafile'] = $result;
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}
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}
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if (isset($defaults['ssl']['cafile']) && (!Filesystem::isReadable($defaults['ssl']['cafile']) || !CaBundle::validateCaFile($defaults['ssl']['cafile'], $logger))) {
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throw new TransportException('The configured cafile was not valid or could not be read.');
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}
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if (isset($defaults['ssl']['capath']) && (!is_dir($defaults['ssl']['capath']) || !Filesystem::isReadable($defaults['ssl']['capath']))) {
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throw new TransportException('The configured capath was not valid or could not be read.');
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}
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/**
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* Disable TLS compression to prevent CRIME attacks where supported.
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*/
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if (PHP_VERSION_ID >= 50413) {
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$defaults['ssl']['disable_compression'] = true;
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}
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return $defaults;
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}
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/**
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* A bug in PHP prevents the headers from correctly being sent when a content-type header is present and
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* NOT at the end of the array
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*
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* This method fixes the array by moving the content-type header to the end
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*
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* @link https://bugs.php.net/bug.php?id=61548
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* @param string|string[] $header
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* @return string[]
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*/
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private static function fixHttpHeaderField($header)
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{
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if (!is_array($header)) {
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$header = explode("\r\n", $header);
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}
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uasort($header, function ($el) {
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return stripos($el, 'content-type') === 0 ? 1 : -1;
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});
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return $header;
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}
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}
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