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<?php declare(strict_types=1); |
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/** |
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* @license http://opensource.org/licenses/mit-license.php MIT |
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* @link https://github.com/nicoSWD |
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* @author Nicolas Oelgart <[email protected]> |
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*/ |
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namespace nicoSWD\SecHeaderCheck\Domain\Validator\Header; |
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use nicoSWD\SecHeaderCheck\Domain\Result\Result\StrictTransportSecurityHeaderResult; |
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use nicoSWD\SecHeaderCheck\Domain\Validator\AbstractHeaderParser; |
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final class StrictTransportSecurityHeader extends AbstractHeaderParser |
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{ |
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private const ONE_YEAR_IN_SECONDS = 31536000; |
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private const FLAG_INCLUDE_SUB_DOMAINS = 'includesubdomains'; |
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public function parse(): StrictTransportSecurityHeaderResult |
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{ |
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return (new StrictTransportSecurityHeaderResult($this->getName(), $this->getValue())) |
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->setHasSecureMaxAge($this->isMinRecommendedMaxAge()) |
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->setHasFlagIncludeSubDomains($this->hasIncludeSubDomainsFlag()); |
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} |
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private function hasIncludeSubDomainsFlag(): bool |
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{ |
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$callback = function (string $option): string { |
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return strtolower(trim($option)); |
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}; |
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$options = array_map($callback, explode(';', $this->getValue())); |
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return in_array(self::FLAG_INCLUDE_SUB_DOMAINS, $options, true); |
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} |
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private function isMinRecommendedMaxAge(): bool |
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{ |
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$maxAge = $this->getMaxAge($this->getValue()); |
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return $maxAge !== false && $maxAge >= self::ONE_YEAR_IN_SECONDS; |
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} |
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private function getMaxAge(string $value) |
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{ |
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if (preg_match('~max-age\s*=\s*([1-9]\d*)~i', $value, $maxAge)) { |
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return (int) $maxAge[1]; |
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} |
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return false; |
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} |
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} |
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nicoSWD /
headsec
