Jose\KeyConverter\ECKey::loadJWK PHP Method

    private function loadJWK(array $jwk)
    {
        Assertion::true(array_key_exists('kty', $jwk), 'JWK is not an Elliptic Curve key');
        Assertion::eq($jwk['kty'], 'EC', 'JWK is not an Elliptic Curve key');
        Assertion::true(array_key_exists('crv', $jwk), 'Curve parameter is missing');
        Assertion::true(array_key_exists('x', $jwk), 'Point parameters are missing');
        Assertion::true(array_key_exists('y', $jwk), 'Point parameters are missing');
        $this->values = $jwk;
        if (array_key_exists('d', $jwk)) {
            $this->initPrivateKey();
        } else {
            $this->initPublicKey();
        }
    }