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Edit File: GitHub.php

<?php declare(strict_types=1);

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Util;

use Composer\Factory;
use Composer\IO\IOInterface;
use Composer\Config;
use Composer\Downloader\TransportException;
use Composer\Pcre\Preg;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class GitHub
{
    /** @var IOInterface */
    protected $io;
    /** @var Config */
    protected $config;
    /** @var ProcessExecutor */
    protected $process;
    /** @var HttpDownloader */
    protected $httpDownloader;

/**
     * Constructor.
     *
     * @param IOInterface     $io             The IO instance
     * @param Config          $config         The composer configuration
     * @param ProcessExecutor $process        Process instance, injectable for mocking
     * @param HttpDownloader  $httpDownloader Remote Filesystem, injectable for mocking
     */
    public function __construct(IOInterface $io, Config $config, ?ProcessExecutor $process = null, ?HttpDownloader $httpDownloader = null)
    {
        $this->io = $io;
        $this->config = $config;
        $this->process = $process ?: new ProcessExecutor($io);
        $this->httpDownloader = $httpDownloader ?: Factory::createHttpDownloader($this->io, $config);
    }

/**
     * Attempts to authorize a GitHub domain via OAuth
     *
     * @param  string $originUrl The host this GitHub instance is located at
     * @return bool   true on success
     */
    public function authorizeOAuth(string $originUrl): bool
    {
        if (!in_array($originUrl, $this->config->get('github-domains'))) {
            return false;
        }

// if available use token from git config
        if (0 === $this->process->execute('git config github.accesstoken', $output)) {
            $this->io->setAuthentication($originUrl, trim($output), 'x-oauth-basic');

return true;
        }

return false;
    }

/**
     * Authorizes a GitHub domain interactively via OAuth
     *
     * @param  string                        $originUrl The host this GitHub instance is located at
     * @param  string                        $message   The reason this authorization is required
     * @throws \RuntimeException
     * @throws TransportException|\Exception
     * @return bool                          true on success
     */
    public function authorizeOAuthInteractively(string $originUrl, ?string $message = null): bool
    {
        if ($message) {
            $this->io->writeError($message);
        }

$note = 'Composer';
        if ($this->config->get('github-expose-hostname') === true && 0 === $this->process->execute('hostname', $output)) {
            $note .= ' on ' . trim($output);
        }
        $note .= ' ' . date('Y-m-d Hi');

$url = 'https://'.$originUrl.'/settings/tokens/new?scopes=&description=' . str_replace('%20', '+', rawurlencode($note));
        $this->io->writeError('When working with _public_ GitHub repositories only, head here to retrieve a token:');
        $this->io->writeError($url);
        $this->io->writeError('This token will have read-only permission for public information only.');

$localAuthConfig = $this->config->getLocalAuthConfigSource();
        $url = 'https://'.$originUrl.'/settings/tokens/new?scopes=repo&description=' . str_replace('%20', '+', rawurlencode($note));
        $this->io->writeError('When you need to access _private_ GitHub repositories as well, go to:');
        $this->io->writeError($url);
        $this->io->writeError('Note that such tokens have broad read/write permissions on your behalf, even if not needed by Composer.');
        $this->io->writeError(sprintf('Tokens will be stored in plain text in "%s" for future use by Composer.', ($localAuthConfig !== null ? $localAuthConfig->getName() . ' OR ' : '') . $this->config->getAuthConfigSource()->getName()));
        $this->io->writeError('For additional information, check https://getcomposer.org/doc/articles/authentication-for-private-packages.md#github-oauth');

$storeInLocalAuthConfig = false;
        if ($localAuthConfig !== null) {
            $storeInLocalAuthConfig = $this->io->askConfirmation('A local auth config source was found, do you want to store the token there?', true);
        }

$token = trim((string) $this->io->askAndHideAnswer('Token (hidden): '));

if ($token === '') {
            $this->io->writeError('<warning>No token given, aborting.</warning>');
            $this->io->writeError('You can also add it manually later by using "composer config --global --auth github-oauth.github.com <token>"');

return false;
        }

$this->io->setAuthentication($originUrl, $token, 'x-oauth-basic');

try {
            $apiUrl = ('github.com' === $originUrl) ? 'api.github.com/' : $originUrl . '/api/v3/';

$this->httpDownloader->get('https://'. $apiUrl, [
                'retry-auth-failure' => false,
            ]);
        } catch (TransportException $e) {
            if (in_array($e->getCode(), [403, 401])) {
                $this->io->writeError('<error>Invalid token provided.</error>');
                $this->io->writeError('You can also add it manually later by using "composer config --global --auth github-oauth.github.com <token>"');

return false;
            }

throw $e;
        }

// store value in local/user config
        $authConfigSource = $storeInLocalAuthConfig && $localAuthConfig !== null ? $localAuthConfig : $this->config->getAuthConfigSource();
        $this->config->getConfigSource()->removeConfigSetting('github-oauth.'.$originUrl);
        $authConfigSource->addConfigSetting('github-oauth.'.$originUrl, $token);

$this->io->writeError('<info>Token stored successfully.</info>');

return true;
    }

/**
     * Extract rate limit from response.
     *
     * @param string[] $headers Headers from Composer\Downloader\TransportException.
     *
     * @return array{limit: int|'?', reset: string}
     */
    public function getRateLimit(array $headers): array
    {
        $rateLimit = [
            'limit' => '?',
            'reset' => '?',
        ];

foreach ($headers as $header) {
            $header = trim($header);
            if (false === stripos($header, 'x-ratelimit-')) {
                continue;
            }
            [$type, $value] = explode(':', $header, 2);
            switch (strtolower($type)) {
                case 'x-ratelimit-limit':
                    $rateLimit['limit'] = (int) trim($value);
                    break;
                case 'x-ratelimit-reset':
                    $rateLimit['reset'] = date('Y-m-d H:i:s', (int) trim($value));
                    break;
            }
        }

return $rateLimit;
    }

/**
     * Extract SSO URL from response.
     *
     * @param string[] $headers Headers from Composer\Downloader\TransportException.
     */
    public function getSsoUrl(array $headers): ?string
    {
        foreach ($headers as $header) {
            $header = trim($header);
            if (false === stripos($header, 'x-github-sso: required')) {
                continue;
            }
            if (Preg::isMatch('{\burl=(?P<url>[^\s;]+)}', $header, $match)) {
                return $match['url'];
            }
        }

return null;
    }

/**
     * Finds whether a request failed due to rate limiting
     *
     * @param string[] $headers Headers from Composer\Downloader\TransportException.
     */
    public function isRateLimited(array $headers): bool
    {
        foreach ($headers as $header) {
            if (Preg::isMatch('{^x-ratelimit-remaining: *0$}i', trim($header))) {
                return true;
            }
        }

return false;
    }

/**
     * Finds whether a request failed due to lacking SSO authorization
     *
     * @see https://docs.github.com/en/rest/overview/other-authentication-methods#authenticating-for-saml-sso
     *
     * @param string[] $headers Headers from Composer\Downloader\TransportException.
     */
    public function requiresSso(array $headers): bool
    {
        foreach ($headers as $header) {
            if (Preg::isMatch('{^x-github-sso: required}i', trim($header))) {
                return true;
            }
        }

return false;
    }
}