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<?php |
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namespace MadWizard\WebAuthn\Attestation\Identifier; |
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use MadWizard\WebAuthn\Exception\ParseException; |
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use MadWizard\WebAuthn\Format\ByteBuffer; |
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final class Aaguid implements IdentifierInterface |
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{ |
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public const TYPE = 'aaguid'; |
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public const AAGUID_LENGTH = 16; |
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/** |
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* @var ByteBuffer |
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*/ |
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private $raw; |
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public function __construct(ByteBuffer $raw) |
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{ |
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if ($raw->getLength() !== self::AAGUID_LENGTH) { |
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throw new ParseException(sprintf('AAGUID should be %d bytes, not %d', self::AAGUID_LENGTH, $raw->getLength())); |
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} |
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$this->raw = $raw; |
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} |
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public function getType(): string |
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{ |
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return self::TYPE; |
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} |
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public static function parseString(string $aaguid): self |
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{ |
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if (!preg_match('~^[0-9A-Fa-f]{8}(-[0-9A-Fa-f]{4}){3}-[0-9A-Fa-f]{12}$~', $aaguid)) { |
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throw new ParseException('Invalid AAGUID'); |
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} |
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$hex = substr($aaguid, 0, 8) . |
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substr($aaguid, 9, 4) . |
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substr($aaguid, 14, 4) . |
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substr($aaguid, 19, 4) . |
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substr($aaguid, 24, 12); |
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return new Aaguid(ByteBuffer::fromHex($hex)); |
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} |
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public function toString(): string |
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{ |
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$hex = $this->raw->getHex(); |
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return sprintf( |
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'%s-%s-%s-%s-%s', |
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substr($hex, 0, 8), |
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substr($hex, 8, 4), |
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substr($hex, 12, 4), |
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substr($hex, 16, 4), |
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substr($hex, 20, 12) |
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); |
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} |
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public function getHex(): string |
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{ |
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return $this->raw->getHex(); |
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} |
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public function isZeroAaguid(): bool |
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{ |
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// Check if all zero bytes - U2F authenticators use this to indicate they have no AAGUID |
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return strspn($this->raw->getBinaryString(), "\0") === self::AAGUID_LENGTH; |
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} |
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public function equals(IdentifierInterface $identifier): bool |
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{ |
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return $identifier instanceof self && $this->raw->equals($identifier->raw); |
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} |
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} |
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madwizard-org /
webauthn-server
