1 files changed, 431 insertions, 353 deletions
diff --git a/vendor/composer/ca-bundle/src/CaBundle.php b/vendor/composer/ca-bundle/src/CaBundle.php
index 0109ba0..a805b9b 100644
--- a/vendor/composer/ca-bundle/src/CaBundle.php
+++ b/vendor/composer/ca-bundle/src/CaBundle.php
@@ -1,353 +1,431 @@
-<?php
-
-/*
- * This file is part of composer/ca-bundle.
- *
- * (c) Composer <https://github.com/composer>
- *
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- */
-
-namespace Composer\CaBundle;
-
-use Psr\Log\LoggerInterface;
-use Symfony\Component\Process\PhpProcess;
-
-/**
- * @author Chris Smith <chris@cs278.org>
- * @author Jordi Boggiano <j.boggiano@seld.be>
- */
-class CaBundle
-{
-    /** @var string|null */
-    private static $caPath;
-    /** @var array<string, bool> */
-    private static $caFileValidity = array();
-    /** @var bool|null */
-    private static $useOpensslParse;
-
-    /**
-     * Returns the system CA bundle path, or a path to the bundled one
-     *
-     * This method was adapted from Sslurp.
-     * https://github.com/EvanDotPro/Sslurp
-     *
-     * (c) Evan Coury <me@evancoury.com>
-     *
-     * For the full copyright and license information, please see below:
-     *
-     * Copyright (c) 2013, Evan Coury
-     * All rights reserved.
-     *
-     * Redistribution and use in source and binary forms, with or without modification,
-     * are permitted provided that the following conditions are met:
-     *
-     *     * Redistributions of source code must retain the above copyright notice,
-     *       this list of conditions and the following disclaimer.
-     *
-     *     * Redistributions in binary form must reproduce the above copyright notice,
-     *       this list of conditions and the following disclaimer in the documentation
-     *       and/or other materials provided with the distribution.
-     *
-     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-     * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-     * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-     * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-     *
-     * @param  LoggerInterface $logger optional logger for information about which CA files were loaded
-     * @return string          path to a CA bundle file or directory
-     */
-    public static function getSystemCaRootBundlePath(LoggerInterface $logger = null)
-    {
-        if (self::$caPath !== null) {
-            return self::$caPath;
-        }
-        $caBundlePaths = array();
-
-        // If SSL_CERT_FILE env variable points to a valid certificate/bundle, use that.
-        // This mimics how OpenSSL uses the SSL_CERT_FILE env variable.
-        $caBundlePaths[] = self::getEnvVariable('SSL_CERT_FILE');
-
-        // If SSL_CERT_DIR env variable points to a valid certificate/bundle, use that.
-        // This mimics how OpenSSL uses the SSL_CERT_FILE env variable.
-        $caBundlePaths[] = self::getEnvVariable('SSL_CERT_DIR');
-
-        $caBundlePaths[] = ini_get('openssl.cafile');
-        $caBundlePaths[] = ini_get('openssl.capath');
-
-        $otherLocations = array(
-            '/etc/pki/tls/certs/ca-bundle.crt', // Fedora, RHEL, CentOS (ca-certificates package)
-            '/etc/ssl/certs/ca-certificates.crt', // Debian, Ubuntu, Gentoo, Arch Linux (ca-certificates package)
-            '/etc/ssl/ca-bundle.pem', // SUSE, openSUSE (ca-certificates package)
-            '/usr/local/share/certs/ca-root-nss.crt', // FreeBSD (ca_root_nss_package)
-            '/usr/ssl/certs/ca-bundle.crt', // Cygwin
-            '/opt/local/share/curl/curl-ca-bundle.crt', // OS X macports, curl-ca-bundle package
-            '/usr/local/share/curl/curl-ca-bundle.crt', // Default cURL CA bunde path (without --with-ca-bundle option)
-            '/usr/share/ssl/certs/ca-bundle.crt', // Really old RedHat?
-            '/etc/ssl/cert.pem', // OpenBSD
-            '/usr/local/etc/ssl/cert.pem', // FreeBSD 10.x
-            '/usr/local/etc/openssl/cert.pem', // OS X homebrew, openssl package
-            '/usr/local/etc/openssl@1.1/cert.pem', // OS X homebrew, openssl@1.1 package
-        );
-
-        foreach($otherLocations as $location) {
-            $otherLocations[] = dirname($location);
-        }
-
-        $caBundlePaths = array_merge($caBundlePaths, $otherLocations);
-
-        foreach ($caBundlePaths as $caBundle) {
-            if ($caBundle && self::caFileUsable($caBundle, $logger)) {
-                return self::$caPath = $caBundle;
-            }
-
-            if ($caBundle && self::caDirUsable($caBundle)) {
-                return self::$caPath = $caBundle;
-            }
-        }
-
-        return self::$caPath = static::getBundledCaBundlePath(); // Bundled CA file, last resort
-    }
-
-    /**
-     * Returns the path to the bundled CA file
-     *
-     * In case you don't want to trust the user or the system, you can use this directly
-     *
-     * @return string path to a CA bundle file
-     */
-    public static function getBundledCaBundlePath()
-    {
-        $caBundleFile = __DIR__.'/../res/cacert.pem';
-
-        // cURL does not understand 'phar://' paths
-        // see https://github.com/composer/ca-bundle/issues/10
-        if (0 === strpos($caBundleFile, 'phar://')) {
-            $tempCaBundleFile = tempnam(sys_get_temp_dir(), 'openssl-ca-bundle-');
-            if (false === $tempCaBundleFile) {
-                throw new \RuntimeException('Could not create a temporary file to store the bundled CA file');
-            }
-
-            file_put_contents(
-                $tempCaBundleFile,
-                file_get_contents($caBundleFile)
-            );
-
-            register_shutdown_function(function() use ($tempCaBundleFile) {
-                @unlink($tempCaBundleFile);
-            });
-
-            $caBundleFile = $tempCaBundleFile;
-        }
-
-        return $caBundleFile;
-    }
-
-    /**
-     * Validates a CA file using opensl_x509_parse only if it is safe to use
-     *
-     * @param string          $filename
-     * @param LoggerInterface $logger   optional logger for information about which CA files were loaded
-     *
-     * @return bool
-     */
-    public static function validateCaFile($filename, LoggerInterface $logger = null)
-    {
-        static $warned = false;
-
-        if (isset(self::$caFileValidity[$filename])) {
-            return self::$caFileValidity[$filename];
-        }
-
-        $contents = file_get_contents($filename);
-
-        // assume the CA is valid if php is vulnerable to
-        // https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html
-        if (!static::isOpensslParseSafe()) {
-            if (!$warned && $logger) {
-                $logger->warning(sprintf(
-                    'Your version of PHP, %s, is affected by CVE-2013-6420 and cannot safely perform certificate validation, we strongly suggest you upgrade.',
-                    PHP_VERSION
-                ));
-                $warned = true;
-            }
-
-            $isValid = !empty($contents);
-        } elseif (is_string($contents) && strlen($contents) > 0) {
-            $contents = preg_replace("/^(\\-+(?:BEGIN|END))\\s+TRUSTED\\s+(CERTIFICATE\\-+)\$/m", '$1 $2', $contents);
-            if (null === $contents) {
-                // regex extraction failed
-                $isValid = false;
-            } else {
-                $isValid = (bool) openssl_x509_parse($contents);
-            }
-        } else {
-            $isValid = false;
-        }
-
-        if ($logger) {
-            $logger->debug('Checked CA file '.realpath($filename).': '.($isValid ? 'valid' : 'invalid'));
-        }
-
-        return self::$caFileValidity[$filename] = $isValid;
-    }
-
-    /**
-     * Test if it is safe to use the PHP function openssl_x509_parse().
-     *
-     * This checks if OpenSSL extensions is vulnerable to remote code execution
-     * via the exploit documented as CVE-2013-6420.
-     *
-     * @return bool
-     */
-    public static function isOpensslParseSafe()
-    {
-        if (null !== self::$useOpensslParse) {
-            return self::$useOpensslParse;
-        }
-
-        if (PHP_VERSION_ID >= 50600) {
-            return self::$useOpensslParse = true;
-        }
-
-        // Vulnerable:
-        // PHP 5.3.0 - PHP 5.3.27
-        // PHP 5.4.0 - PHP 5.4.22
-        // PHP 5.5.0 - PHP 5.5.6
-        if (
-               (PHP_VERSION_ID < 50400 && PHP_VERSION_ID >= 50328)
-            || (PHP_VERSION_ID < 50500 && PHP_VERSION_ID >= 50423)
-            || PHP_VERSION_ID >= 50507
-        ) {
-            // This version of PHP has the fix for CVE-2013-6420 applied.
-            return self::$useOpensslParse = true;
-        }
-
-        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
-            // Windows is probably insecure in this case.
-            return self::$useOpensslParse = false;
-        }
-
-        $compareDistroVersionPrefix = function ($prefix, $fixedVersion) {
-            $regex = '{^'.preg_quote($prefix).'([0-9]+)$}';
-
-            if (preg_match($regex, PHP_VERSION, $m)) {
-                return ((int) $m[1]) >= $fixedVersion;
-            }
-
-            return false;
-        };
-
-        // Hard coded list of PHP distributions with the fix backported.
-        if (
-            $compareDistroVersionPrefix('5.3.3-7+squeeze', 18) // Debian 6 (Squeeze)
-            || $compareDistroVersionPrefix('5.4.4-14+deb7u', 7) // Debian 7 (Wheezy)
-            || $compareDistroVersionPrefix('5.3.10-1ubuntu3.', 9) // Ubuntu 12.04 (Precise)
-        ) {
-            return self::$useOpensslParse = true;
-        }
-
-        // Symfony Process component is missing so we assume it is unsafe at this point
-        if (!class_exists('Symfony\Component\Process\PhpProcess')) {
-            return self::$useOpensslParse = false;
-        }
-
-        // This is where things get crazy, because distros backport security
-        // fixes the chances are on NIX systems the fix has been applied but
-        // it's not possible to verify that from the PHP version.
-        //
-        // To verify exec a new PHP process and run the issue testcase with
-        // known safe input that replicates the bug.
-
-        // Based on testcase in https://github.com/php/php-src/commit/c1224573c773b6845e83505f717fbf820fc18415
-        // changes in https://github.com/php/php-src/commit/76a7fd893b7d6101300cc656058704a73254d593
-        $cert = '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';
-        $script = <<<'EOT'
-
-error_reporting(-1);
-$info = openssl_x509_parse(base64_decode('%s'));
-var_dump(PHP_VERSION, $info['issuer']['emailAddress'], $info['validFrom_time_t']);
-
-EOT;
-        $script = '<'."?php\n".sprintf($script, $cert);
-
-        try {
-            $process = new PhpProcess($script);
-            $process->mustRun();
-        } catch (\Exception $e) {
-            // In the case of any exceptions just accept it is not possible to
-            // determine the safety of openssl_x509_parse and bail out.
-            return self::$useOpensslParse = false;
-        }
-
-        $output = preg_split('{\r?\n}', trim($process->getOutput()));
-        $errorOutput = trim($process->getErrorOutput());
-
-        if (
-            is_array($output)
-            && count($output) === 3
-            && $output[0] === sprintf('string(%d) "%s"', strlen(PHP_VERSION), PHP_VERSION)
-            && $output[1] === 'string(27) "stefan.esser@sektioneins.de"'
-            && $output[2] === 'int(-1)'
-            && preg_match('{openssl_x509_parse\(\): illegal (?:ASN1 data type for|length in) timestamp in - on line \d+}', $errorOutput)
-        ) {
-            // This PHP has the fix backported probably by a distro security team.
-            return self::$useOpensslParse = true;
-        }
-
-        return self::$useOpensslParse = false;
-    }
-
-    /**
-     * Resets the static caches
-     * @return void
-     */
-    public static function reset()
-    {
-        self::$caFileValidity = array();
-        self::$caPath = null;
-        self::$useOpensslParse = null;
-    }
-
-    /**
-     * @param  string $name
-     * @return string|false
-     */
-    private static function getEnvVariable($name)
-    {
-        if (isset($_SERVER[$name])) {
-            return (string) $_SERVER[$name];
-        }
-
-        if (PHP_SAPI === 'cli' && ($value = getenv($name)) !== false && $value !== null) {
-            return (string) $value;
-        }
-
-        return false;
-    }
-
-    /**
-     * @param  string|false $certFile
-     * @return bool
-     */
-    private static function caFileUsable($certFile, LoggerInterface $logger = null)
-    {
-        return $certFile && @is_file($certFile) && @is_readable($certFile) && static::validateCaFile($certFile, $logger);
-    }
-
-    /**
-     * @param  string|false $certDir
-     * @return bool
-     */
-    private static function caDirUsable($certDir)
-    {
-        return $certDir && @is_dir($certDir) && @is_readable($certDir) && glob($certDir . '/*');
-    }
-}
+<?php
+
+/*
+ * This file is part of composer/ca-bundle.
+ *
+ * (c) Composer <https://github.com/composer>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Composer\CaBundle;
+
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Process\PhpProcess;
+
+/**
+ * @author Chris Smith <chris@cs278.org>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+class CaBundle
+{
+    /** @var string|null */
+    private static $caPath;
+    /** @var array<string, bool> */
+    private static $caFileValidity = array();
+    /** @var bool|null */
+    private static $useOpensslParse;
+
+    /**
+     * Returns the system CA bundle path, or a path to the bundled one
+     *
+     * This method was adapted from Sslurp.
+     * https://github.com/EvanDotPro/Sslurp
+     *
+     * (c) Evan Coury <me@evancoury.com>
+     *
+     * For the full copyright and license information, please see below:
+     *
+     * Copyright (c) 2013, Evan Coury
+     * All rights reserved.
+     *
+     * Redistribution and use in source and binary forms, with or without modification,
+     * are permitted provided that the following conditions are met:
+     *
+     *     * Redistributions of source code must retain the above copyright notice,
+     *       this list of conditions and the following disclaimer.
+     *
+     *     * Redistributions in binary form must reproduce the above copyright notice,
+     *       this list of conditions and the following disclaimer in the documentation
+     *       and/or other materials provided with the distribution.
+     *
+     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+     * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+     * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+     * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+     *
+     * @param  LoggerInterface $logger optional logger for information about which CA files were loaded
+     * @return string          path to a CA bundle file or directory
+     */
+    public static function getSystemCaRootBundlePath(LoggerInterface $logger = null)
+    {
+        if (self::$caPath !== null) {
+            return self::$caPath;
+        }
+        $caBundlePaths = array();
+
+        // If SSL_CERT_FILE env variable points to a valid certificate/bundle, use that.
+        // This mimics how OpenSSL uses the SSL_CERT_FILE env variable.
+        $caBundlePaths[] = self::getEnvVariable('SSL_CERT_FILE');
+
+        // If SSL_CERT_DIR env variable points to a valid certificate/bundle, use that.
+        // This mimics how OpenSSL uses the SSL_CERT_FILE env variable.
+        $caBundlePaths[] = self::getEnvVariable('SSL_CERT_DIR');
+
+        $caBundlePaths[] = ini_get('openssl.cafile');
+        $caBundlePaths[] = ini_get('openssl.capath');
+
+        $otherLocations = array(
+            '/etc/pki/tls/certs/ca-bundle.crt', // Fedora, RHEL, CentOS (ca-certificates package)
+            '/etc/ssl/certs/ca-certificates.crt', // Debian, Ubuntu, Gentoo, Arch Linux (ca-certificates package)
+            '/etc/ssl/ca-bundle.pem', // SUSE, openSUSE (ca-certificates package)
+            '/usr/local/share/certs/ca-root-nss.crt', // FreeBSD (ca_root_nss_package)
+            '/usr/ssl/certs/ca-bundle.crt', // Cygwin
+            '/opt/local/share/curl/curl-ca-bundle.crt', // OS X macports, curl-ca-bundle package
+            '/usr/local/share/curl/curl-ca-bundle.crt', // Default cURL CA bunde path (without --with-ca-bundle option)
+            '/usr/share/ssl/certs/ca-bundle.crt', // Really old RedHat?
+            '/etc/ssl/cert.pem', // OpenBSD
+            '/usr/local/etc/ssl/cert.pem', // FreeBSD 10.x
+            '/usr/local/etc/openssl/cert.pem', // OS X homebrew, openssl package
+            '/usr/local/etc/openssl@1.1/cert.pem', // OS X homebrew, openssl@1.1 package
+        );
+
+        foreach($otherLocations as $location) {
+            $otherLocations[] = dirname($location);
+        }
+
+        $caBundlePaths = array_merge($caBundlePaths, $otherLocations);
+
+        foreach ($caBundlePaths as $caBundle) {
+            if ($caBundle && self::caFileUsable($caBundle, $logger)) {
+                return self::$caPath = $caBundle;
+            }
+
+            if ($caBundle && self::caDirUsable($caBundle, $logger)) {
+                return self::$caPath = $caBundle;
+            }
+        }
+
+        return self::$caPath = static::getBundledCaBundlePath(); // Bundled CA file, last resort
+    }
+
+    /**
+     * Returns the path to the bundled CA file
+     *
+     * In case you don't want to trust the user or the system, you can use this directly
+     *
+     * @return string path to a CA bundle file
+     */
+    public static function getBundledCaBundlePath()
+    {
+        $caBundleFile = __DIR__.'/../res/cacert.pem';
+
+        // cURL does not understand 'phar://' paths
+        // see https://github.com/composer/ca-bundle/issues/10
+        if (0 === strpos($caBundleFile, 'phar://')) {
+            $tempCaBundleFile = tempnam(sys_get_temp_dir(), 'openssl-ca-bundle-');
+            if (false === $tempCaBundleFile) {
+                throw new \RuntimeException('Could not create a temporary file to store the bundled CA file');
+            }
+
+            file_put_contents(
+                $tempCaBundleFile,
+                file_get_contents($caBundleFile)
+            );
+
+            register_shutdown_function(function() use ($tempCaBundleFile) {
+                @unlink($tempCaBundleFile);
+            });
+
+            $caBundleFile = $tempCaBundleFile;
+        }
+
+        return $caBundleFile;
+    }
+
+    /**
+     * Validates a CA file using opensl_x509_parse only if it is safe to use
+     *
+     * @param string          $filename
+     * @param LoggerInterface $logger   optional logger for information about which CA files were loaded
+     *
+     * @return bool
+     */
+    public static function validateCaFile($filename, LoggerInterface $logger = null)
+    {
+        static $warned = false;
+
+        if (isset(self::$caFileValidity[$filename])) {
+            return self::$caFileValidity[$filename];
+        }
+
+        $contents = file_get_contents($filename);
+
+        // assume the CA is valid if php is vulnerable to
+        // https://www.sektioneins.de/advisories/advisory-012013-php-openssl_x509_parse-memory-corruption-vulnerability.html
+        if (!static::isOpensslParseSafe()) {
+            if (!$warned && $logger) {
+                $logger->warning(sprintf(
+                    'Your version of PHP, %s, is affected by CVE-2013-6420 and cannot safely perform certificate validation, we strongly suggest you upgrade.',
+                    PHP_VERSION
+                ));
+                $warned = true;
+            }
+
+            $isValid = !empty($contents);
+        } elseif (is_string($contents) && strlen($contents) > 0) {
+            $contents = preg_replace("/^(\\-+(?:BEGIN|END))\\s+TRUSTED\\s+(CERTIFICATE\\-+)\$/m", '$1 $2', $contents);
+            if (null === $contents) {
+                // regex extraction failed
+                $isValid = false;
+            } else {
+                $isValid = (bool) openssl_x509_parse($contents);
+            }
+        } else {
+            $isValid = false;
+        }
+
+        if ($logger) {
+            $logger->debug('Checked CA file '.realpath($filename).': '.($isValid ? 'valid' : 'invalid'));
+        }
+
+        return self::$caFileValidity[$filename] = $isValid;
+    }
+
+    /**
+     * Test if it is safe to use the PHP function openssl_x509_parse().
+     *
+     * This checks if OpenSSL extensions is vulnerable to remote code execution
+     * via the exploit documented as CVE-2013-6420.
+     *
+     * @return bool
+     */
+    public static function isOpensslParseSafe()
+    {
+        if (null !== self::$useOpensslParse) {
+            return self::$useOpensslParse;
+        }
+
+        if (PHP_VERSION_ID >= 50600) {
+            return self::$useOpensslParse = true;
+        }
+
+        // Vulnerable:
+        // PHP 5.3.0 - PHP 5.3.27
+        // PHP 5.4.0 - PHP 5.4.22
+        // PHP 5.5.0 - PHP 5.5.6
+        if (
+               (PHP_VERSION_ID < 50400 && PHP_VERSION_ID >= 50328)
+            || (PHP_VERSION_ID < 50500 && PHP_VERSION_ID >= 50423)
+            || PHP_VERSION_ID >= 50507
+        ) {
+            // This version of PHP has the fix for CVE-2013-6420 applied.
+            return self::$useOpensslParse = true;
+        }
+
+        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
+            // Windows is probably insecure in this case.
+            return self::$useOpensslParse = false;
+        }
+
+        $compareDistroVersionPrefix = function ($prefix, $fixedVersion) {
+            $regex = '{^'.preg_quote($prefix).'([0-9]+)$}';
+
+            if (preg_match($regex, PHP_VERSION, $m)) {
+                return ((int) $m[1]) >= $fixedVersion;
+            }
+
+            return false;
+        };
+
+        // Hard coded list of PHP distributions with the fix backported.
+        if (
+            $compareDistroVersionPrefix('5.3.3-7+squeeze', 18) // Debian 6 (Squeeze)
+            || $compareDistroVersionPrefix('5.4.4-14+deb7u', 7) // Debian 7 (Wheezy)
+            || $compareDistroVersionPrefix('5.3.10-1ubuntu3.', 9) // Ubuntu 12.04 (Precise)
+        ) {
+            return self::$useOpensslParse = true;
+        }
+
+        // Symfony Process component is missing so we assume it is unsafe at this point
+        if (!class_exists('Symfony\Component\Process\PhpProcess')) {
+            return self::$useOpensslParse = false;
+        }
+
+        // This is where things get crazy, because distros backport security
+        // fixes the chances are on NIX systems the fix has been applied but
+        // it's not possible to verify that from the PHP version.
+        //
+        // To verify exec a new PHP process and run the issue testcase with
+        // known safe input that replicates the bug.
+
+        // Based on testcase in https://github.com/php/php-src/commit/c1224573c773b6845e83505f717fbf820fc18415
+        // changes in https://github.com/php/php-src/commit/76a7fd893b7d6101300cc656058704a73254d593
+        $cert = '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';
+        $script = <<<'EOT'
+
+error_reporting(-1);
+$info = openssl_x509_parse(base64_decode('%s'));
+var_dump(PHP_VERSION, $info['issuer']['emailAddress'], $info['validFrom_time_t']);
+
+EOT;
+        $script = '<'."?php\n".sprintf($script, $cert);
+
+        try {
+            $process = new PhpProcess($script);
+            $process->mustRun();
+        } catch (\Exception $e) {
+            // In the case of any exceptions just accept it is not possible to
+            // determine the safety of openssl_x509_parse and bail out.
+            return self::$useOpensslParse = false;
+        }
+
+        $output = preg_split('{\r?\n}', trim($process->getOutput()));
+        $errorOutput = trim($process->getErrorOutput());
+
+        if (
+            is_array($output)
+            && count($output) === 3
+            && $output[0] === sprintf('string(%d) "%s"', strlen(PHP_VERSION), PHP_VERSION)
+            && $output[1] === 'string(27) "stefan.esser@sektioneins.de"'
+            && $output[2] === 'int(-1)'
+            && preg_match('{openssl_x509_parse\(\): illegal (?:ASN1 data type for|length in) timestamp in - on line \d+}', $errorOutput)
+        ) {
+            // This PHP has the fix backported probably by a distro security team.
+            return self::$useOpensslParse = true;
+        }
+
+        return self::$useOpensslParse = false;
+    }
+
+    /**
+     * Resets the static caches
+     * @return void
+     */
+    public static function reset()
+    {
+        self::$caFileValidity = array();
+        self::$caPath = null;
+        self::$useOpensslParse = null;
+    }
+
+    /**
+     * @param  string $name
+     * @return string|false
+     */
+    private static function getEnvVariable($name)
+    {
+        if (isset($_SERVER[$name])) {
+            return (string) $_SERVER[$name];
+        }
+
+        if (PHP_SAPI === 'cli' && ($value = getenv($name)) !== false && $value !== null) {
+            return (string) $value;
+        }
+
+        return false;
+    }
+
+    /**
+     * @param  string|false $certFile
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function caFileUsable($certFile, LoggerInterface $logger = null)
+    {
+        return $certFile
+            && static::isFile($certFile, $logger)
+            && static::isReadable($certFile, $logger)
+            && static::validateCaFile($certFile, $logger);
+    }
+
+    /**
+     * @param  string|false $certDir
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function caDirUsable($certDir, LoggerInterface $logger = null)
+    {
+        return $certDir
+            && static::isDir($certDir, $logger)
+            && static::isReadable($certDir, $logger)
+            && static::glob($certDir . '/*', $logger);
+    }
+
+    /**
+     * @param  string $certFile
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function isFile($certFile, LoggerInterface $logger = null)
+    {
+        $isFile = @is_file($certFile);
+        if (!$isFile && $logger) {
+            $logger->debug(sprintf('Checked CA file %s does not exist or it is not a file.', $certFile));
+        }
+
+        return $isFile;
+    }
+
+    /**
+     * @param  string $certDir
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function isDir($certDir, LoggerInterface $logger = null)
+    {
+        $isDir = @is_dir($certDir);
+        if (!$isDir && $logger) {
+            $logger->debug(sprintf('Checked directory %s does not exist or it is not a directory.', $certDir));
+        }
+
+        return $isDir;
+    }
+
+    /**
+     * @param  string $certFileOrDir
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function isReadable($certFileOrDir, LoggerInterface $logger = null)
+    {
+        $isReadable = @is_readable($certFileOrDir);
+        if (!$isReadable && $logger) {
+            $logger->debug(sprintf('Checked file or directory %s is not readable.', $certFileOrDir));
+        }
+
+        return $isReadable;
+    }
+
+    /**
+     * @param  string $pattern
+     * @param  LoggerInterface|null $logger
+     * @return bool
+     */
+    private static function glob($pattern, LoggerInterface $logger = null)
+    {
+        $certs = glob($pattern);
+        if ($certs === false) {
+            if ($logger) {
+                $logger->debug(sprintf("An error occurred while trying to find certificates for pattern: %s", $pattern));
+            }
+            return false;
+        }
+
+        if (count($certs) === 0) {
+            if ($logger) {
+                $logger->debug(sprintf("No CA files found for pattern: %s", $pattern));
+            }
+            return false;
+        }
+
+        return true;
+    }
+}