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22 * @file scalarproduct.h
23 * @brief Scalar Product Message Types
24 * @author Christian M. Fuchs
26 * Created on September 2, 2013, 3:43 PM
29 #ifndef SCALARPRODUCT_H
30 #define SCALARPRODUCT_H
36 ///////////////////////////////////////////////////////////////////////////////
38 ///////////////////////////////////////////////////////////////////////////////
41 * Maximum count of elements we can put into a multipart message
43 #define MULTIPART_ELEMENT_CAPACITY ((GNUNET_SERVER_MAX_MESSAGE_SIZE - 1 - sizeof (struct GNUNET_SCALARPRODUCT_multipart_message)) / sizeof (struct GNUNET_CRYPTO_PaillierCiphertext))
46 * Log an error message at log-level 'level' that indicates
47 * a failure of the command 'cmd' with the message given
48 * by gcry_strerror(rc).
50 #define LOG_GCRY(level, cmd, rc) do { LOG(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, gcry_strerror(rc)); } while(0)
52 ///////////////////////////////////////////////////////////////////////////////
53 // Scalar Product Message Types
54 ///////////////////////////////////////////////////////////////////////////////
57 * Message type passed from client to service
58 * to initiate a request or responder role
60 struct GNUNET_SCALARPRODUCT_computation_message
63 * GNUNET message header
65 struct GNUNET_MessageHeader header;
68 * how many elements the vector in payload contains
70 uint32_t element_count_total GNUNET_PACKED;
73 * contained elements the vector in payload contains
75 uint32_t element_count_contained GNUNET_PACKED;
78 * the transaction/session key used to identify a session
80 struct GNUNET_HashCode session_key;
83 * the identity of a remote peer we want to communicate with
85 struct GNUNET_PeerIdentity peer;
88 * followed by struct GNUNET_SCALARPRODUCT_Element[]
93 * multipart messages following GNUNET_SCALARPRODUCT_client_request
95 struct GNUNET_SCALARPRODUCT_computation_message_multipart
98 * GNUNET message header
100 struct GNUNET_MessageHeader header;
103 * contained elements the vector in payload contains
105 uint32_t element_count_contained GNUNET_PACKED;
108 * followed by struct GNUNET_SCALARPRODUCT_Element[]
114 * Message type passed from requesting service Alice to responding service Bob
115 * to initiate a request and make bob participate in our protocol
117 struct GNUNET_SCALARPRODUCT_service_request {
119 * GNUNET message header
121 struct GNUNET_MessageHeader header;
124 * how many elements the total message including all multipart msgs contains
126 uint32_t total_element_count GNUNET_PACKED;
129 * the transaction/session key used to identify a session
131 struct GNUNET_HashCode session_id;
136 struct GNUNET_CRYPTO_PaillierPublicKey public_key;
142 * Message type passed from requesting service Alice to responding service Bob
143 * to initiate a request and make bob participate in our protocol
145 struct GNUNET_SCALARPRODUCT_alices_cryptodata_message {
147 * GNUNET message header
149 struct GNUNET_MessageHeader header;
152 * how many elements we appended to this message
154 uint32_t contained_element_count GNUNET_PACKED;
157 * struct GNUNET_CRYPTO_PaillierCiphertext[contained_element_count]
162 * Multipart Message type passed between to supply additional elements for the peer
164 struct GNUNET_SCALARPRODUCT_multipart_message {
166 * GNUNET message header
168 struct GNUNET_MessageHeader header;
171 * how many elements we supply within this message
173 uint32_t contained_element_count GNUNET_PACKED;
175 // struct GNUNET_CRYPTO_PaillierCiphertext[multipart_element_count]
179 * Message type passed from responding service Bob to responding service Alice
180 * to complete a request and allow Alice to compute the result
182 struct GNUNET_SCALARPRODUCT_service_response {
184 * GNUNET message header
186 struct GNUNET_MessageHeader header;
189 * how many elements the session input had
191 uint32_t total_element_count GNUNET_PACKED;
194 * how many elements were included after the mask was applied including all multipart msgs.
196 uint32_t used_element_count GNUNET_PACKED;
199 * how many elements this individual message delivers
201 uint32_t contained_element_count GNUNET_PACKED;
204 * the transaction/session key used to identify a session
206 struct GNUNET_HashCode key;
209 * followed by s | s' | k[i][perm]
214 * Message type passed from service client
215 * to finalize a session as requester or responder
217 struct GNUNET_SCALARPRODUCT_client_response
220 * GNUNET message header
222 struct GNUNET_MessageHeader header;
225 * 0 if no product attached
227 uint32_t product_length GNUNET_PACKED;
230 * the transaction/session key used to identify a session
232 struct GNUNET_HashCode key;
235 * the identity of a remote peer we want to communicate with
237 struct GNUNET_PeerIdentity peer;
240 * status information about the outcome of this session
245 * Workaround for libgcrypt: -1 if negative, 0 if zero, else 1
250 * followed by product of length product_length (or nothing)
258 #endif /* SCALARPRODUCT_H */