Jose\KeyConverter\ECKey::loadPEM PHP Method

    private function loadPEM($data)
    {
        $data = base64_decode(preg_replace('#-.*-|\\r|\\n#', '', $data));
        $asnObject = Object::fromBinary($data);
        Assertion::isInstanceOf($asnObject, Sequence::class);
        $children = $asnObject->getChildren();
        if (self::isPKCS8($children)) {
            $children = self::loadPKCS8($children);
        }
        if (4 === count($children)) {
            return $this->loadPrivatePEM($children);
        } elseif (2 === count($children)) {
            return $this->loadPublicPEM($children);
        }
        throw new \Exception('Unable to load the key');
    }