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<?php |
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namespace MadWizard\WebAuthn\Credential; |
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use Exception; |
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use MadWizard\WebAuthn\Exception\NotAvailableException; |
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use MadWizard\WebAuthn\Exception\WebAuthnException; |
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use MadWizard\WebAuthn\Format\Base64UrlEncoding; |
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use MadWizard\WebAuthn\Format\BinaryHandle; |
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use MadWizard\WebAuthn\Format\ByteBuffer; |
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use function hash_equals; |
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use function sprintf; |
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class UserHandle extends BinaryHandle |
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{ |
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/** |
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* SPEC: 4 Terminology - User Handle. |
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*/ |
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public const MAX_USER_HANDLE_BYTES = 64; |
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protected function __construct(string $rawBytes) |
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{ |
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if (\strlen($rawBytes) > self::MAX_USER_HANDLE_BYTES) { |
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throw new WebAuthnException(sprintf('User handle cannot be larger than %d bytes.', self::MAX_USER_HANDLE_BYTES)); |
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} |
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parent::__construct($rawBytes); |
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} |
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public static function fromString(string $base64urlString): self |
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{ |
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return new self(Base64UrlEncoding::decode($base64urlString)); |
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} |
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public static function fromBinary(string $binary): self |
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{ |
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return new self($binary); |
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} |
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public static function fromHex(string $hex): self |
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{ |
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return new self(parent::convertHex($hex)); |
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} |
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public static function fromBuffer(ByteBuffer $buffer): self |
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{ |
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return new self($buffer->getBinaryString()); |
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} |
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public static function random(int $length = self::MAX_USER_HANDLE_BYTES): self |
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{ |
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try { |
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return new UserHandle(random_bytes($length)); |
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} catch (Exception $e) { |
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throw new NotAvailableException('Cannot generate random bytes for user handle.', 0, $e); |
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} |
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} |
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public function equals(self $other): bool |
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{ |
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return hash_equals($this->raw, $other->raw); |
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} |
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} |
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madwizard-org /
webauthn-server
