public function format(PublicKeyInterface $key)
{
if (!$key->getCurve() instanceof NamedCurveFp) {
throw new \RuntimeException('Not implemented for unnamed curves');
}
$sequence = new Sequence(new Sequence(new ObjectIdentifier(DerPublicKeySerializer::X509_ECDSA_OID), CurveOidMapper::getCurveOid($key->getCurve())), new BitString($this->encodePoint($key->getPoint())));
return $sequence->getBinary();
}
/**
* @param string $curveName
* @param PublicKeyInterface $publicKey
* @return string
*/
public function serialize($curveName, PublicKeyInterface $publicKey)
{
$ecdsa = 'ecdsa-sha2-' . $curveName;
$key = hex2bin($this->pointSerializer->serialize($publicKey->getPoint()));
$serialized = pack("N", strlen($ecdsa)) . $ecdsa;
$serialized .= pack("N", strlen($curveName)) . $curveName;
$serialized .= pack("N", strlen($key)) . $key;
return base64_encode($serialized);
}
/**
*
*/
private function calculateKey()
{
$this->checkExchangeState();
if ($this->secretKey === null) {
$this->secretKey = $this->recipientKey->getPoint()->mul($this->senderKey->getSecret());
}
}
/**
* @param PublicKeyInterface $key
* @param SignatureInterface $signature
* @param $hash
* @return bool
*/
public function verify(PublicKeyInterface $key, SignatureInterface $signature, $hash)
{
$generator = $key->getGenerator();
$n = $generator->getOrder();
$point = $key->getPoint();
$r = $signature->getR();
$s = $signature->getS();
$math = $this->adapter;
if ($math->cmp($r, 1) < 1 || $math->cmp($r, $math->sub($n, 1)) > 0) {
return false;
}
if ($math->cmp($s, 1) < 1 || $math->cmp($s, $math->sub($n, 1)) > 0) {
return false;
}
$modMath = $math->getModularArithmetic($n);
$c = $math->inverseMod($s, $n);
$u1 = $modMath->mul($hash, $c);
$u2 = $modMath->mul($r, $c);
$xy = $generator->mul($u1)->add($point->mul($u2));
$v = $math->mod($xy->getX(), $n);
return $math->cmp($v, $r) == 0;
}
/**
* @param OutputInterface $output
* @param PublicKeyInterface $key
*/
public static function dumpPublicKey(OutputInterface $output, PublicKeyInterface $key)
{
$order = $key->getPoint()->getOrder();
$output->writeln('<comment>Public key information</comment>');
$output->writeln('');
$output->writeln('<info>Curve type</info> : ' . $key->getCurve()->getName());
$output->writeln('<info>X</info> : ' . $key->getPoint()->getX());
$output->writeln('<info>Y</info> : ' . $key->getPoint()->getY());
$output->writeln('<info>Order</info> : ' . (empty($order) ? '<null>' : $key->getPoint()->getOrder()));
}
public function getUncompressedKey(PublicKeyInterface $key)
{
return $this->formatter->encodePoint($key->getPoint());
}
