This file is indexed.

/usr/share/php/Composer/Util/Git.php is in composer 1.0.0~beta2-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
<?php

/*
 * 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\Config;
use Composer\IO\IOInterface;
use Composer\Downloader\TransportException;

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

    public function __construct(IOInterface $io, Config $config, ProcessExecutor $process, Filesystem $fs)
    {
        $this->io = $io;
        $this->config = $config;
        $this->process = $process;
        $this->filesystem = $fs;
    }

    public function runCommand($commandCallable, $url, $cwd, $initialClone = false)
    {
        if (preg_match('{^(http|git):}i', $url) && $this->config->get('secure-http')) {
            throw new TransportException("Your configuration does not allow connection to $url. See https://getcomposer.org/doc/06-config.md#secure-http for details.");
        }

        if ($initialClone) {
            $origCwd = $cwd;
            $cwd = null;
        }

        if (preg_match('{^ssh://[^@]+@[^:]+:[^0-9]+}', $url)) {
            throw new \InvalidArgumentException('The source URL '.$url.' is invalid, ssh URLs should have a port number after ":".'."\n".'Use ssh://git@example.com:22/path or just git@example.com:path if you do not want to provide a password or custom port.');
        }

        if (!$initialClone) {
            // capture username/password from URL if there is one
            $this->process->execute('git remote -v', $output, $cwd);
            if (preg_match('{^(?:composer|origin)\s+https?://(.+):(.+)@([^/]+)}im', $output, $match)) {
                $this->io->setAuthentication($match[3], urldecode($match[1]), urldecode($match[2]));
            }
        }

        $protocols = $this->config->get('github-protocols');
        if (!is_array($protocols)) {
            throw new \RuntimeException('Config value "github-protocols" must be an array, got '.gettype($protocols));
        }
        // public github, autoswitch protocols
        if (preg_match('{^(?:https?|git)://'.self::getGitHubDomainsRegex($this->config).'/(.*)}', $url, $match)) {
            $messages = array();
            foreach ($protocols as $protocol) {
                if ('ssh' === $protocol) {
                    $protoUrl = "git@" . $match[1] . ":" . $match[2];
                } else {
                    $protoUrl = $protocol ."://" . $match[1] . "/" . $match[2];
                }

                if (0 === $this->process->execute(call_user_func($commandCallable, $protoUrl), $ignoredOutput, $cwd)) {
                    return;
                }
                $messages[] = '- ' . $protoUrl . "\n" . preg_replace('#^#m', '  ', $this->process->getErrorOutput());
                if ($initialClone) {
                    $this->filesystem->removeDirectory($origCwd);
                }
            }

            // failed to checkout, first check git accessibility
            $this->throwException('Failed to clone ' . self::sanitizeUrl($url) .' via '.implode(', ', $protocols).' protocols, aborting.' . "\n\n" . implode("\n", $messages), $url);
        }

        // if we have a private github url and the ssh protocol is disabled then we skip it and directly fallback to https
        $bypassSshForGitHub = preg_match('{^git@'.self::getGitHubDomainsRegex($this->config).':(.+?)\.git$}i', $url) && !in_array('ssh', $protocols, true);

        $command = call_user_func($commandCallable, $url);

        $auth = null;
        if ($bypassSshForGitHub || 0 !== $this->process->execute($command, $ignoredOutput, $cwd)) {
            // private github repository without git access, try https with auth
            if (preg_match('{^git@'.self::getGitHubDomainsRegex($this->config).':(.+?)\.git$}i', $url, $match)) {
                if (!$this->io->hasAuthentication($match[1])) {
                    $gitHubUtil = new GitHub($this->io, $this->config, $this->process);
                    $message = 'Cloning failed using an ssh key for authentication, enter your GitHub credentials to access private repos';

                    if (!$gitHubUtil->authorizeOAuth($match[1]) && $this->io->isInteractive()) {
                        $gitHubUtil->authorizeOAuthInteractively($match[1], $message);
                    }
                }

                if ($this->io->hasAuthentication($match[1])) {
                    $auth = $this->io->getAuthentication($match[1]);
                    $authUrl = 'https://'.rawurlencode($auth['username']) . ':' . rawurlencode($auth['password']) . '@'.$match[1].'/'.$match[2].'.git';
                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        return;
                    }
                }
            } elseif ($this->isAuthenticationFailure($url, $match)) { // private non-github repo that failed to authenticate
                if (strpos($match[2], '@')) {
                    list($authParts, $match[2]) = explode('@', $match[2], 2);
                }

                $storeAuth = false;
                if ($this->io->hasAuthentication($match[2])) {
                    $auth = $this->io->getAuthentication($match[2]);
                } elseif ($this->io->isInteractive()) {
                    $defaultUsername = null;
                    if (isset($authParts) && $authParts) {
                        if (false !== strpos($authParts, ':')) {
                            list($defaultUsername, ) = explode(':', $authParts, 2);
                        } else {
                            $defaultUsername = $authParts;
                        }
                    }

                    $this->io->writeError('    Authentication required (<info>'.parse_url($url, PHP_URL_HOST).'</info>):');
                    $auth = array(
                        'username'  => $this->io->ask('      Username: ', $defaultUsername),
                        'password'  => $this->io->askAndHideAnswer('      Password: '),
                    );
                    $storeAuth = $this->config->get('store-auths');
                }

                if ($auth) {
                    $authUrl = $match[1].rawurlencode($auth['username']).':'.rawurlencode($auth['password']).'@'.$match[2].$match[3];

                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        $this->io->setAuthentication($match[2], $auth['username'], $auth['password']);
                        $authHelper = new AuthHelper($this->io, $this->config);
                        $authHelper->storeAuth($match[2], $storeAuth);

                        return;
                    }
                }
            }

            if ($initialClone) {
                $this->filesystem->removeDirectory($origCwd);
            }
            $this->throwException('Failed to execute ' . self::sanitizeUrl($command) . "\n\n" . $this->process->getErrorOutput(), $url);
        }
    }

    private function isAuthenticationFailure($url, &$match)
    {
        if (!preg_match('{(https?://)([^/]+)(.*)$}i', $url, $match)) {
            return false;
        }

        $authFailures = array('fatal: Authentication failed', 'remote error: Invalid username or password.');
        foreach ($authFailures as $authFailure) {
            if (strpos($this->process->getErrorOutput(), $authFailure) !== false) {
                return true;
            }
        }

        return false;
    }

    public static function cleanEnv()
    {
        if (ini_get('safe_mode') && false === strpos(ini_get('safe_mode_allowed_env_vars'), 'GIT_ASKPASS')) {
            throw new \RuntimeException('safe_mode is enabled and safe_mode_allowed_env_vars does not contain GIT_ASKPASS, can not set env var. You can disable safe_mode with "-dsafe_mode=0" when running composer');
        }

        // added in git 1.7.1, prevents prompting the user for username/password
        if (getenv('GIT_ASKPASS') !== 'echo') {
            putenv('GIT_ASKPASS=echo');
            unset($_SERVER['GIT_ASKPASS']);
        }

        // clean up rogue git env vars in case this is running in a git hook
        if (getenv('GIT_DIR')) {
            putenv('GIT_DIR');
            unset($_SERVER['GIT_DIR']);
        }
        if (getenv('GIT_WORK_TREE')) {
            putenv('GIT_WORK_TREE');
            unset($_SERVER['GIT_WORK_TREE']);
        }

        // Run processes with predictable LANGUAGE
        if (getenv('LANGUAGE') !== 'C') {
            putenv('LANGUAGE=C');
        }

        // clean up env for OSX, see https://github.com/composer/composer/issues/2146#issuecomment-35478940
        putenv("DYLD_LIBRARY_PATH");
        unset($_SERVER['DYLD_LIBRARY_PATH']);
    }

    public static function getGitHubDomainsRegex(Config $config)
    {
        return '('.implode('|', array_map('preg_quote', $config->get('github-domains'))).')';
    }

    public static function sanitizeUrl($message)
    {
        return preg_replace('{://([^@]+?):.+?@}', '://$1:***@', $message);
    }

    private function throwException($message, $url)
    {
        // git might delete a directory when it fails and php will not know
        clearstatcache();

        if (0 !== $this->process->execute('git --version', $ignoredOutput)) {
            throw new \RuntimeException('Failed to clone '.self::sanitizeUrl($url).', git was not found, check that it is installed and in your PATH env.' . "\n\n" . $this->process->getErrorOutput());
        }

        throw new \RuntimeException($message);
    }
}