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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 Affero 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.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @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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