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/*
This file is part of GNUnet.
Copyright (C) 2015 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 scalarproduct/gnunet-service-scalarproduct-ecc.h
* @brief scalarproduct service P2P messages
* @author Christian M. Fuchs
* @author Christian Grothoff
*/
#ifndef GNUNET_SERVICE_SCALARPRODUCT_ECC_H
#define GNUNET_SERVICE_SCALARPRODUCT_ECC_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 EccServiceRequestMessage
{
/**
* Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_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;
};
/**
* Vector of ECC-encrypted values sent by Alice to Bob
* (after set intersection). Alice may send messages of this
* type repeatedly to transmit all values.
*/
struct EccAliceCryptodataMessage
{
/**
* Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_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_EccPoint[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 EccBobCryptodataMessage
{
/**
* GNUNET message header with type
* #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_BOB_CRYPTODATA.
*/
struct GNUNET_MessageHeader header;
/**
* How many elements this individual message delivers (in NBO),
* always TWO.
*/
uint32_t contained_element_count GNUNET_PACKED;
/**
* The product of the g_i^{b_i} values.
*/
struct GNUNET_CRYPTO_EccPoint prod_g_i_b_i;
/**
* The product of the h_i^{b_i} values.
*/
struct GNUNET_CRYPTO_EccPoint prod_h_i_b_i;
};
GNUNET_NETWORK_STRUCT_END
#endif
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