gnunet_secretsharing_service.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 GNUNET_SECRETSHARING_SERVICE_H
#define GNUNET_SECRETSHARING_SERVICE_H
 
#ifdef __cplusplus
extern "C"
{
#if 0                           /* keep Emacsens' auto-indent happy */
}
#endif
#endif
 
 
#include "gnunet_common.h"
#include "gnunet_time_lib.h"
#include "gnunet_configuration_lib.h"
#include <gcrypt.h>
 
 
#define GNUNET_SECRETSHARING_ELGAMAL_BITS 1024
 
 
#define GNUNET_SECRETSHARING_ELGAMAL_P_HEX  \
  "0x08a347d3d69e8b2dd7d1b12a08dfbccbebf4ca" \
  "6f4269a0814e158a34312964d946b3ef22882317" \
  "2bcf30fc08f772774cb404f9bc002a6f66b09a79" \
  "d810d67c4f8cb3bedc6060e3c8ef874b1b64df71" \
  "6c7d2b002da880e269438d5a776e6b5f253c8df5" \
  "6a16b1c7ce58def07c03db48238aadfc52a354a2" \
  "7ed285b0c1675cad3f3"
 
#define GNUNET_SECRETSHARING_ELGAMAL_Q_HEX  \
  "0x0451a3e9eb4f4596ebe8d895046fde65f5fa65" \
  "37a134d040a70ac51a1894b26ca359f79144118b" \
  "95e7987e047bb93ba65a027cde001537b3584d3c" \
  "ec086b3e27c659df6e303071e477c3a58db26fb8" \
  "b63e958016d4407134a1c6ad3bb735af929e46fa" \
  "b50b58e3e72c6f783e01eda411c556fe2951aa51" \
  "3f6942d860b3ae569f9"
 
#define GNUNET_SECRETSHARING_ELGAMAL_G_HEX  \
  "0x05c00c36d2e822950087ef09d8252994adc4e4" \
  "8fe3ec70269f035b46063aff0c99b633fd64df43" \
  "02442e1914c829a41505a275438871f365e91c12" \
  "3d5303ef9e90f4b8cb89bf86cc9b513e74a72634" \
  "9cfd9f953674fab5d511e1c078fc72d72b34086f" \
  "c82b4b951989eb85325cb203ff98df76bc366bba" \
  "1d7024c3650f60d0da"
 
 
struct GNUNET_SECRETSHARING_Session;
 
struct GNUNET_SECRETSHARING_Share;
 
 
struct GNUNET_SECRETSHARING_DecryptionHandle;
 
 
struct GNUNET_SECRETSHARING_PublicKey
{
  uint32_t bits[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8 / sizeof(uint32_t)];
};
 
 
struct GNUNET_SECRETSHARING_Ciphertext
{
  uint32_t c1_bits[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8 / sizeof(uint32_t)];
  uint32_t c2_bits[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8 / sizeof(uint32_t)];
};
 
 
struct GNUNET_SECRETSHARING_Plaintext
{
  uint32_t bits[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8 / sizeof(uint32_t)];
};
 
 
typedef void
(*GNUNET_SECRETSHARING_SecretReadyCallback) (void *cls,
                                             struct GNUNET_SECRETSHARING_Share *
                                             my_share,
                                             struct
                                             GNUNET_SECRETSHARING_PublicKey *
                                             public_key,
                                             unsigned int num_ready_peers,
                                             const struct
                                             GNUNET_PeerIdentity *ready_peers);
 
 
typedef void
(*GNUNET_SECRETSHARING_DecryptCallback) (void *cls,
                                         const struct
                                         GNUNET_SECRETSHARING_Plaintext *
                                         plaintext);
 
 
struct GNUNET_SECRETSHARING_Session *
GNUNET_SECRETSHARING_create_session (const struct
                                     GNUNET_CONFIGURATION_Handle *cfg,
                                     unsigned int num_peers,
                                     const struct GNUNET_PeerIdentity *peers,
                                     const struct GNUNET_HashCode *session_id,
                                     struct GNUNET_TIME_Absolute start,
                                     struct GNUNET_TIME_Absolute deadline,
                                     unsigned int threshold,
                                     GNUNET_SECRETSHARING_SecretReadyCallback cb,
                                     void *cls);
 
 
void
GNUNET_SECRETSHARING_session_destroy (struct GNUNET_SECRETSHARING_Session *s);
 
 
int
GNUNET_SECRETSHARING_encrypt (const struct
                              GNUNET_SECRETSHARING_PublicKey *public_key,
                              const struct
                              GNUNET_SECRETSHARING_Plaintext *plaintext,
                              struct GNUNET_SECRETSHARING_Ciphertext *
                              result_ciphertext);
 
 
struct GNUNET_SECRETSHARING_DecryptionHandle *
GNUNET_SECRETSHARING_decrypt (const struct GNUNET_CONFIGURATION_Handle *cfg,
                              struct GNUNET_SECRETSHARING_Share *share,
                              const struct
                              GNUNET_SECRETSHARING_Ciphertext *ciphertext,
                              struct GNUNET_TIME_Absolute start,
                              struct GNUNET_TIME_Absolute deadline,
                              GNUNET_SECRETSHARING_DecryptCallback decrypt_cb,
                              void *decrypt_cb_cls);
 
 
void
GNUNET_SECRETSHARING_decrypt_cancel (struct
                                     GNUNET_SECRETSHARING_DecryptionHandle *dh);
 
 
struct GNUNET_SECRETSHARING_Share *
GNUNET_SECRETSHARING_share_read (const void *data, size_t len, size_t *readlen);
 
 
int
GNUNET_SECRETSHARING_share_write (const struct
                                  GNUNET_SECRETSHARING_Share *share,
                                  void *buf, size_t buflen, size_t *writelen);
 
 
void
GNUNET_SECRETSHARING_share_destroy (struct GNUNET_SECRETSHARING_Share *share);
 
 
int
GNUNET_SECRETSHARING_plaintext_generate (struct
                                         GNUNET_SECRETSHARING_Plaintext *
                                         plaintext,
                                         gcry_mpi_t exponent);
 
int
GNUNET_SECRETSHARING_plaintext_generate_i (struct
                                           GNUNET_SECRETSHARING_Plaintext *
                                           plaintext,
                                           int64_t exponent);
 
 
#if 0                           /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
 
#endif
  /* end of group */