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/*
This file is part of GNUnet
Copyright (C) 2012 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU 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.
*/
/**
* @file secretsharing/secretsharing_protocol.h
* @brief p2p message definitions for secretsharing
* @author Florian Dold
*/
#ifndef GNUNET_SECRETSHARING_PROTOCOL_H
#define GNUNET_SECRETSHARING_PROTOCOL_H
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_protocols.h"
#include "secretsharing.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Consensus element data used in the first round of key generation.
*/
struct GNUNET_SECRETSHARING_KeygenCommitData
{
/**
* Signature over the rest of the message.
*/
struct GNUNET_CRYPTO_EddsaSignature signature;
/**
* Signature purpose for signing the keygen commit data.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Peer that inserts this element.
*/
struct GNUNET_PeerIdentity peer;
/**
* Ephemeral paillier public key used by 'peer' for
* this session.
*/
struct GNUNET_CRYPTO_PaillierPublicKey pubkey;
/**
* Commitment of 'peer' to his presecret.
*/
struct GNUNET_HashCode commitment GNUNET_PACKED;
};
struct GNUNET_SECRETSHARING_KeygenRevealData
{
/**
* Signature over rest of the message.
*/
struct GNUNET_CRYPTO_EddsaSignature signature;
/*
* Signature purpose for signing the keygen commit data.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Peer that inserts this element.
*/
struct GNUNET_PeerIdentity peer;
/* values follow */
};
/**
* Data of then element put in consensus
* for decrypting a value.
*/
struct GNUNET_SECRETSHARING_DecryptData
{
/*
* Signature over rest of the message.
*/
struct GNUNET_CRYPTO_EddsaSignature signature;
/*
* Signature purpose for signing the keygen commit data.
*/
struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
/**
* Ciphertext we want to decrypt.
*/
struct GNUNET_SECRETSHARING_Ciphertext ciphertext;
/**
* Peer that inserts this element.
*/
struct GNUNET_PeerIdentity peer;
/**
* Partial decryption, computed as c_1^{s_i}
*/
struct GNUNET_SECRETSHARING_FieldElement partial_decryption;
/**
* Commitment for the non-interactive zero knowledge proof.
* g^\beta, with \beta < q
*/
struct GNUNET_SECRETSHARING_FieldElement nizk_commit1;
/**
* Commitment for the non-interactive zero knowledge proof.
* c_1^\beta, with \beta < q
*/
struct GNUNET_SECRETSHARING_FieldElement nizk_commit2;
/**
* Reponse to the challenge computed from the protocol transcript.
* r = \beta + challenge \cdot share_i
*/
struct GNUNET_SECRETSHARING_FieldElement nizk_response;
};
struct GNUNET_SECRETSHARING_FairEncryption
{
struct GNUNET_CRYPTO_PaillierCiphertext c;
/**
* h = g^x, where x is the fairly encrypte secret.
*/
char h[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8];
char t1[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8];
char t2[GNUNET_CRYPTO_PAILLIER_BITS * 2 / 8];
char z[GNUNET_SECRETSHARING_ELGAMAL_BITS / 8];
char w[GNUNET_CRYPTO_PAILLIER_BITS / 8];
};
GNUNET_NETWORK_STRUCT_END
#endif
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