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/*
This file is part of GNUnet.
Copyright (C) 2013, 2014 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, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file scalarproduct/gnunet-service-scalarproduct.h
* @brief scalarproduct service P2P messages
* @author Christian M. Fuchs
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_SCALARPRODUCT_H
#define GNUNET_SERVICE_SCALARPRODUCT_H
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Message type passed from requesting service Alice to responding
* service Bob to initiate a request and make Bob participate in our
* protocol. Afterwards, Bob is expected to perform the set
* intersection with Alice. Once that has succeeded, Alice will
* send a `struct AliceCryptodataMessage *`. Bob is not expected
* to respond via CADET in the meantime.
*/
struct ServiceRequestMessage
{
/**
* Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_SESSION_INITIALIZATION
*/
struct GNUNET_MessageHeader header;
/**
* For alignment. Always zero.
*/
uint32_t reserved;
/**
* The transaction/session key used to identify a session
*/
struct GNUNET_HashCode session_id;
/**
* Alice's public key
*/
struct GNUNET_CRYPTO_PaillierPublicKey public_key;
};
/**
* Vector of Pallier-encrypted values sent by Alice to Bob
* (after set intersection). Alice may send messages of this
* type repeatedly to transmit all values.
*/
struct AliceCryptodataMessage
{
/**
* Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ALICE_CRYPTODATA
*/
struct GNUNET_MessageHeader header;
/**
* How many elements we appended to this message? In NBO.
*/
uint32_t contained_element_count GNUNET_PACKED;
/**
* struct GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]
*/
};
/**
* Message type passed from responding service Bob to responding
* service Alice to complete a request and allow Alice to compute the
* result. If Bob's reply does not fit into this one message, the
* conversation may be continued with `struct BobCryptodataMultipartMessage`
* messages afterwards.
*/
struct BobCryptodataMessage
{
/**
* GNUNET message header with type
* #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_BOB_CRYPTODATA.
*/
struct GNUNET_MessageHeader header;
/**
* How many elements this individual message delivers (in NBO).
*/
uint32_t contained_element_count GNUNET_PACKED;
/**
* followed by s | s' | k[i][perm]
*/
};
/**
* Multipart Message type passed between to supply additional elements
* for the peer. Send from Bob to Alice with additional elements
* of k[i][perm] after his `struct BobCryptodataMessage *`.
* Once all k-values have been transmitted, Bob is finished and
* Alice can transmit the final result to the client.
*/
struct BobCryptodataMultipartMessage
{
/**
* GNUNET message header
*/
struct GNUNET_MessageHeader header;
/**
* How many elements we supply within this message? In NBO.
*/
uint32_t contained_element_count GNUNET_PACKED;
/**
* Followed by `struct
* GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]`
*/
};
GNUNET_NETWORK_STRUCT_END
#endif
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