2 This file is part of GNUnet
3 (C) 2012 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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13 General Public License for more details.
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23 * @file secretsharing/secretsharing_protocol.h
24 * @brief p2p message definitions for secretsharing
25 * @author Florian Dold
28 #ifndef GNUNET_SECRETSHARING_PROTOCOL_H
29 #define GNUNET_SECRETSHARING_PROTOCOL_H
32 #include "gnunet_common.h"
33 #include "gnunet_protocols.h"
34 #include "secretsharing.h"
37 * Bit length used for the Paillier crypto system.
39 #define PAILLIER_BITS 2048
41 GNUNET_NETWORK_STRUCT_BEGIN
45 * Public key for the Paillier crypto system.
47 struct PaillierPublicKey
50 * Network order representation of the
53 uint32_t g[PAILLIER_BITS / 8 / sizeof (uint32_t)];
56 * Network order representation of the
59 uint32_t n[PAILLIER_BITS / 8 / sizeof (uint32_t)];
64 * Consensus element data used in the first round of key generation.
66 struct GNUNET_SECRETSHARING_KeygenCommitData
69 * Signature over the rest of the message.
71 struct GNUNET_CRYPTO_EddsaSignature signature;
73 * Signature purpose for signing the keygen commit data.
75 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
77 * Peer that inserts this element.
79 struct GNUNET_PeerIdentity peer;
81 * Ephemeral paillier public key used by 'peer' for
84 struct PaillierPublicKey pubkey GNUNET_PACKED;
86 * Commitment of 'peer' to his presecret.
88 struct GNUNET_HashCode commitment GNUNET_PACKED;
92 struct GNUNET_SECRETSHARING_KeygenRevealData
95 * Signature over rest of the message.
97 struct GNUNET_CRYPTO_EddsaSignature signature;
99 * Signature purpose for signing the keygen commit data.
101 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
103 * Peer that inserts this element.
105 struct GNUNET_PeerIdentity peer;
112 * Data of then element put in consensus
113 * for decrypting a value.
115 struct GNUNET_SECRETSHARING_DecryptData
118 * Signature over rest of the message.
120 struct GNUNET_CRYPTO_EddsaSignature signature;
122 * Signature purpose for signing the keygen commit data.
124 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
126 * Ciphertext we want to decrypt.
128 struct GNUNET_SECRETSHARING_Ciphertext ciphertext;
130 * Peer that inserts this element.
132 struct GNUNET_PeerIdentity peer;
134 * Partial decryption, computed as c_1^{s_i}
136 struct GNUNET_SECRETSHARING_FieldElement partial_decryption;
138 * Commitment for the non-interactive zero knowledge proof.
139 * g^\beta, with \beta < q
141 struct GNUNET_SECRETSHARING_FieldElement nizk_commit1;
143 * Commitment for the non-interactive zero knowledge proof.
144 * c_1^\beta, with \beta < q
146 struct GNUNET_SECRETSHARING_FieldElement nizk_commit2;
148 * Reponse to the challenge computed from the protocol transcript.
149 * r = \beta + challenge \cdot share_i
151 struct GNUNET_SECRETSHARING_FieldElement nizk_response;
154 GNUNET_NETWORK_STRUCT_END