@Asn1Property(order=0)
    public Body getBody() {
        return body;
    }
@Test
    public void shouldVerifyNikCvca() throws IOException {
        byte[] data = Resources.toByteArray(Resources.getResource("nik/tv/cvca.cvcert"));
        final CvCertificate cert = mapper.read(data, CvCertificate.class);
        assertDoesNotThrow(() -> new SignatureService().verify(cert, cert.getBody().getPublicKey(), cert.getBody().getPublicKey().getParams()));
    }