2 This file is part of GNUnet.
3 Copyright (C) 2013, 2014 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * @file scalarproduct/gnunet-service-scalarproduct.h
22 * @brief scalarproduct service P2P messages
23 * @author Christian M. Fuchs
24 * @author Christian Grothoff
26 #ifndef GNUNET_SERVICE_SCALARPRODUCT_H
27 #define GNUNET_SERVICE_SCALARPRODUCT_H
30 GNUNET_NETWORK_STRUCT_BEGIN
33 * Message type passed from requesting service Alice to responding
34 * service Bob to initiate a request and make Bob participate in our
35 * protocol. Afterwards, Bob is expected to perform the set
36 * intersection with Alice. Once that has succeeded, Alice will
37 * send a `struct AliceCryptodataMessage *`. Bob is not expected
38 * to respond via CADET in the meantime.
40 struct ServiceRequestMessage
43 * Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_SESSION_INITIALIZATION
45 struct GNUNET_MessageHeader header;
48 * For alignment. Always zero.
53 * The transaction/session key used to identify a session
55 struct GNUNET_HashCode session_id;
60 struct GNUNET_CRYPTO_PaillierPublicKey public_key;
65 * Vector of Pallier-encrypted values sent by Alice to Bob
66 * (after set intersection). Alice may send messages of this
67 * type repeatedly to transmit all values.
69 struct AliceCryptodataMessage
72 * Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ALICE_CRYPTODATA
74 struct GNUNET_MessageHeader header;
77 * How many elements we appended to this message? In NBO.
79 uint32_t contained_element_count GNUNET_PACKED;
82 * struct GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]
88 * Message type passed from responding service Bob to responding
89 * service Alice to complete a request and allow Alice to compute the
90 * result. If Bob's reply does not fit into this one message, the
91 * conversation may be continued with `struct BobCryptodataMultipartMessage`
92 * messages afterwards.
94 struct BobCryptodataMessage
97 * GNUNET message header with type
98 * #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_BOB_CRYPTODATA.
100 struct GNUNET_MessageHeader header;
103 * How many elements this individual message delivers (in NBO).
105 uint32_t contained_element_count GNUNET_PACKED;
108 * followed by s | s' | k[i][perm]
114 * Multipart Message type passed between to supply additional elements
115 * for the peer. Send from Bob to Alice with additional elements
116 * of k[i][perm] after his `struct BobCryptodataMessage *`.
117 * Once all k-values have been transmitted, Bob is finished and
118 * Alice can transmit the final result to the client.
120 struct BobCryptodataMultipartMessage
123 * GNUNET message header
125 struct GNUNET_MessageHeader header;
128 * How many elements we supply within this message? In NBO.
130 uint32_t contained_element_count GNUNET_PACKED;
133 * Followed by `struct
134 * GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]`
139 GNUNET_NETWORK_STRUCT_END