secretsharing.h

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/*
     This file is part of GNUnet.
     Copyright (C) 2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */

#ifndef SECRETSHARING_H
#define SECRETSHARING_H

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_time_lib.h"
#include "gnunet_common.h"
#include "gnunet_secretsharing_service.h"


GNUNET_NETWORK_STRUCT_BEGIN

struct GNUNET_SECRETSHARING_FieldElement
{
  unsigned char bits[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8];
};


struct GNUNET_SECRETSHARING_CreateMessage
{
  struct GNUNET_MessageHeader header;

  struct GNUNET_HashCode session_id GNUNET_PACKED;

  struct GNUNET_TIME_AbsoluteNBO start;

  struct GNUNET_TIME_AbsoluteNBO deadline;

  uint16_t threshold GNUNET_PACKED;

  uint16_t num_peers GNUNET_PACKED;

  /* struct GNUNET_PeerIdentity[num_peers]; */
};


struct GNUNET_SECRETSHARING_ShareHeaderNBO
{
  uint16_t threshold;

  uint16_t num_peers;

  uint16_t my_peer;

  struct GNUNET_SECRETSHARING_PublicKey public_key;

  struct GNUNET_SECRETSHARING_FieldElement my_share;
};


struct GNUNET_SECRETSHARING_SecretReadyMessage
{
  struct GNUNET_MessageHeader header;

  /* rest: the serialized share */
};


struct GNUNET_SECRETSHARING_DecryptRequestMessage
{
  struct GNUNET_MessageHeader header;

  struct GNUNET_TIME_AbsoluteNBO start;

  struct GNUNET_TIME_AbsoluteNBO deadline;

  struct GNUNET_SECRETSHARING_Ciphertext ciphertext;

  /* the share with payload */
};


struct GNUNET_SECRETSHARING_DecryptResponseMessage
{
  struct GNUNET_MessageHeader header;

  uint32_t success GNUNET_PACKED;

  struct GNUNET_SECRETSHARING_FieldElement plaintext;
};


GNUNET_NETWORK_STRUCT_END


struct GNUNET_SECRETSHARING_Share
{
  uint16_t threshold;

  uint16_t num_peers;

  uint16_t my_peer;

  struct GNUNET_SECRETSHARING_PublicKey public_key;

  struct GNUNET_SECRETSHARING_FieldElement my_share;

  struct GNUNET_PeerIdentity *peers;

  /*
   * For each peer, store elgamal_g to the peer's
   * share.
   */
  struct GNUNET_SECRETSHARING_FieldElement *sigmas;

  /*
   * Original indices of peers from the DKG round.
   */
  uint16_t *original_indices;
};


#endif