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<?php
namespace MadWizard\WebAuthn\Attestation\Tpm;
use MadWizard\WebAuthn\Format\ByteBuffer;
final class TpmEccParameters implements KeyParametersInterface
{
/**
* @var int
*/
private $symmetric;
private $scheme;
private $curveId;
private $kdf;
public function __construct(int $symmetric, int $scheme, int $curveId, int $kdf)
$this->symmetric = $symmetric;
$this->scheme = $scheme;
$this->curveId = $curveId;
$this->kdf = $kdf;
}
public function getAlgorithm(): int
return TpmPublic::TPM_ALG_ECC;
public static function parse(ByteBuffer $buffer, int $offset, int &$endOffset): KeyParametersInterface
$symmetric = $buffer->getUint16Val($offset);
$scheme = $buffer->getUint16Val($offset + 2);
$curveId = $buffer->getUint16Val($offset + 4);
$kdf = $buffer->getUint16Val($offset + 6);
$endOffset = $offset + 8;
return new self($symmetric, $scheme, $curveId, $kdf);
public function getSymmetric(): int
return $this->symmetric;
public function getScheme(): int
return $this->scheme;
public function getCurveId(): int
return $this->curveId;
public function getKdf(): int
return $this->kdf;
madwizard-org /
webauthn-server
