Ejemplos de calc_ecdh_key en C++ (Cpp)

Ejemplo n.º 1

Archivo: ecdhe.c Proyecto: randombit/hacrypto

int _gnutls_proc_ecdh_common_client_kx(gnutls_session_t session,
				       uint8_t * data, size_t _data_size,
				       gnutls_ecc_curve_t curve,
				       gnutls_datum_t * psk_key)
{
	ssize_t data_size = _data_size;
	int ret, i = 0;
	int point_size;

	if (curve == GNUTLS_ECC_CURVE_INVALID)
		return gnutls_assert_val(GNUTLS_E_ECC_NO_SUPPORTED_CURVES);

	DECR_LEN(data_size, 1);
	point_size = data[i];
	i += 1;

	DECR_LEN(data_size, point_size);
	ret =
	    _gnutls_ecc_ansi_x963_import(&data[i], point_size,
					 &session->key.ecdh_x,
					 &session->key.ecdh_y);
	if (ret < 0)
		return gnutls_assert_val(ret);

	/* generate pre-shared key */
	ret = calc_ecdh_key(session, psk_key, curve);
	if (ret < 0)
		return gnutls_assert_val(ret);

	return 0;
}

Ejemplo n.º 2

Archivo: ecdh_common.c Proyecto: nobled/gnutls

int
_gnutls_gen_ecdh_common_client_kx_int (gnutls_session_t session, 
                                   gnutls_buffer_st* data, 
                                   gnutls_datum_t * psk_key)
{
  int ret;
  gnutls_datum_t out;
  int curve = _gnutls_session_ecc_curve_get(session);

  /* generate temporal key */
  ret = _gnutls_pk_generate(GNUTLS_PK_EC, curve, &session->key.ecdh_params);
  if (ret < 0)
    return gnutls_assert_val(ret);

  ret = _gnutls_ecc_ansi_x963_export(curve, session->key.ecdh_params.params[6] /* x */,
    session->key.ecdh_params.params[7] /* y */, &out);
  if (ret < 0)
    return gnutls_assert_val(ret);

  ret = _gnutls_buffer_append_data_prefix(data, 8, out.data, out.size);
  
  _gnutls_free_datum(&out);
  
  if (ret < 0)
    return gnutls_assert_val(ret);

  /* generate pre-shared key */
  ret = calc_ecdh_key(session, psk_key);
  if (ret < 0)
    return gnutls_assert_val(ret);

  return data->length;
}