2 This file is part of GNUnet.
3 (C) 2013, 2014 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
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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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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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;
66 * Vector of Pallier-encrypted values sent by Alice to Bob
67 * (after set intersection). Alice may send messages of this
68 * type repeatedly to transmit all values.
70 struct AliceCryptodataMessage
73 * Type is #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ALICE_CRYPTODATA
75 struct GNUNET_MessageHeader header;
78 * How many elements we appended to this message? In NBO.
80 uint32_t contained_element_count GNUNET_PACKED;
83 * struct GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]
89 * Message type passed from responding service Bob to responding
90 * service Alice to complete a request and allow Alice to compute the
91 * result. If Bob's reply does not fit into this one message, the
92 * conversation may be continued with `struct BobCryptodataMultipartMessage`
93 * messages afterwards.
95 struct BobCryptodataMessage
98 * GNUNET message header with type
99 * #GNUNET_MESSAGE_TYPE_SCALARPRODUCT_BOB_CRYPTODATA.
101 struct GNUNET_MessageHeader header;
104 * How many elements this individual message delivers (in NBO).
106 uint32_t contained_element_count GNUNET_PACKED;
109 * followed by s | s' | k[i][perm]
115 * Multipart Message type passed between to supply additional elements
116 * for the peer. Send from Bob to Alice with additional elements
117 * of k[i][perm] after his `struct BobCryptodataMessage *`.
118 * Once all k-values have been transmitted, Bob is finished and
119 * Alice can transmit the final result to the client.
121 struct BobCryptodataMultipartMessage
124 * GNUNET message header
126 struct GNUNET_MessageHeader header;
129 * How many elements we supply within this message? In NBO.
131 uint32_t contained_element_count GNUNET_PACKED;
134 * Followed by `struct
135 * GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]`
141 GNUNET_NETWORK_STRUCT_END