/**
* Initialize from a PublicKey object.
*
* @param PublicKey $pub_key Public key
* @throws \UnexpectedValueException
* @return self
*/
public static function fromPublicKey(PublicKey $pub_key)
{
if ($pub_key instanceof RSAPublicKey) {
return RSAPublicKeyJWK::fromRSAPublicKey($pub_key);
}
if ($pub_key instanceof ECPublicKey) {
return ECPublicKeyJWK::fromECPublicKey($pub_key);
}
throw new \UnexpectedValueException("Unsupported public key.");
}
/**
*
* @param JWK $jwk
* @param Header $header
* @throws \UnexpectedValueException
* @return RSASSAPKCS1Algorithm
*/
public static function fromJWK(JWK $jwk, Header $header)
{
$alg = JWA::deriveAlgorithmName($header, $jwk);
if (!array_key_exists($alg, self::MAP_ALGO_TO_CLASS)) {
throw new \UnexpectedValueException("Unsupported algorithm '{$alg}'.");
}
$cls = self::MAP_ALGO_TO_CLASS[$alg];
if ($jwk->has(...RSAPrivateKeyJWK::MANAGED_PARAMS)) {
return $cls::fromPrivateKey(RSAPrivateKeyJWK::fromJWK($jwk));
}
return $cls::fromPublicKey(RSAPublicKeyJWK::fromJWK($jwk));
}
