src/Composer/Util/TlsHelper.php
public static function checkCertificateHost($certificate, $hostname, &$cn = null)
    {
        $names = self::getCertificateNames($certificate);

        if (empty($names)) {
            return false;
        }

        $combinedNames = array_merge($names['san'], array($names['cn']));
        $hostname = strtolower($hostname);

        foreach ($combinedNames as $certName) {
            $matcher = self::certNameMatcher($certName);

            if ($matcher && $matcher($hostname)) {
                $cn = $names['cn'];

                return true;
            }
        }

        return false;
    }
public static function checkCertificateHost($certificate, $hostname, &$cn = null)
    {
        $names = self::getCertificateNames($certificate);

        if (empty($names)) {
            return false;
        }

        $combinedNames = array_merge($names['san'], array($names['cn']));
        $hostname = strtolower($hostname);

        foreach ($combinedNames as $certName) {
            $matcher = self::certNameMatcher($certName);

            if ($matcher && $matcher($hostname)) {
                $cn = $names['cn'];

                return true;
            }
        }

        return false;
    }
Match hostname against a certificate.

@param mixed  $certificate X.509 certificate
@param string $hostname    Hostname in the URL
@param string $cn          Set to the common name of the certificate iff match found

@return bool