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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\ReferrerPolicyHeaderResult; |
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use nicoSWD\SecHeaderCheck\Domain\Validator\AbstractHeaderParser; |
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final class ReferrerPolicyHeader extends AbstractHeaderParser |
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{ |
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public function parse(): ReferrerPolicyHeaderResult |
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{ |
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return (new ReferrerPolicyHeaderResult($this->getName(), $this->getValue())) |
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->setMayLeakOrigin($this->mayLeakOrigin()) |
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->setDoesNotLeakReferrer($this->doesNotLeakReferrer()); |
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} |
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private function doesNotLeakReferrer(): bool |
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{ |
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$secureReferrerOptions = [ |
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'no-referrer', |
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'no-referrer-when-downgrade', |
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'same-origin', |
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'strict-origin', |
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]; |
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return $this->valueIsIn($secureReferrerOptions); |
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} |
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private function mayLeakOrigin(): bool |
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{ |
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$leakyReferrerOptions = [ |
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'origin', |
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'origin-when-cross-origin', |
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'strict-origin-when-cross-origin', |
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'unsafe-url', |
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]; |
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return $this->valueIsIn($leakyReferrerOptions); |
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} |
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private function valueIsIn(array $options): bool |
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{ |
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$value = strtolower($this->getValue()); |
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$values = preg_split('~\s*,\s*~', $value, -1, PREG_SPLIT_NO_EMPTY); |
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return ($options !== array_intersect($options, $values)); |
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} |
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} |
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nicoSWD /
headsec
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