96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* This file is part of libbrandt.
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* Copyright (C) 2016 GNUnet e.V.
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*
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* libbrandt is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libbrandt is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* libbrandt. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file internals.h
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* @brief This header contains library internal structs.
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* @author Markus Teich
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*/
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#ifndef _BRANDT_INTERNALS_H
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#define _BRANDT_INTERNALS_H
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#include <gcrypt.h>
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#include "brandt.h"
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enum rounds {
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msg_init,
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msg_bid,
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msg_outcome,
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msg_decrypt,
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msg_last
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};
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/**
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* This struct describes an auction and has to be followed by #description_len
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* bytes of arbitrary data where the description of the item to be sold is
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* stored. */
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struct AuctionDescr {
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/** The length of the description in bytes directly following this struct */
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uint32_t description_len;
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/** Auction type. 0 means first price Auction, >= 0 means M+1st price
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* auction with an amount of m items being sold. */
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uint16_t m;
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/** Outcome type. 0 means private outcome, everything else means public
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* outcome. */
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uint16_t outcome_public;
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/** The amount of possible prices */
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uint16_t price_range;
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};
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struct BRANDT_Auction {
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struct AuctionDescr *desc; /** pointer to the auction information */
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BRANDT_CbBroadcast bcast; /** broadcast callback */
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BRANDT_CbUnicast ucast; /** unicast callback */
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BRANDT_CbResult result; /** result reporting callback */
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int seller_mode; /** If 0 we are bidding, selling otherwise */
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enum rounds cur_round; /** The round we expect messages from */
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gcry_mpi_t round_progress; /** Stores which round messages were received */
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uint16_t n; /** The amount of bidders/agents */
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uint16_t k; /** The amount of possible prices */
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uint16_t i; /** Own agents index, only used when bidding */
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uint16_t b; /** Own bid */
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gcry_mpi_t x; /** Own private additive key share */
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gcry_mpi_point_t *y; /** public multiplicative key shares, size: n */
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gcry_mpi_point_t Y; /** Shared public key */
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gcry_mpi_point_t **alpha; /** alphas, size: n*k */
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gcry_mpi_point_t **beta; /** betas, size: n*k */
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gcry_mpi_point_t **gamma2; /** gamma2, for public outcome, size: n*k */
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gcry_mpi_point_t ***gamma3; /** gamma3, for private outcome, size: n*n*k */
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gcry_mpi_point_t **delta2; /** delta2, for public outcome, size: n*k */
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gcry_mpi_point_t ***delta3; /** delta3, for private outcome, size: n*n*k */
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gcry_mpi_point_t **phi2; /** phi2, for public outcome, size: n*k */
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gcry_mpi_point_t ***phi3; /** phi3, for private outcome, size: n*n*k */
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gcry_mpi_point_t *tmpa1; /** used for temporary storage, size: k */
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gcry_mpi_point_t *tmpb1; /** used for temporary storage, size: k */
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};
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#endif /* ifndef _BRANDT_INTERNALS_H */
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