GNUnet  0.11.x
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gnunet-service-scalarproduct-ecc_bob.c File Reference

scalarproduct service implementation More...

#include "platform.h"
#include <limits.h>
#include <gcrypt.h>
#include "gnunet_util_lib.h"
#include "gnunet_core_service.h"
#include "gnunet_cadet_service.h"
#include "gnunet_applications.h"
#include "gnunet_protocols.h"
#include "gnunet_scalarproduct_service.h"
#include "gnunet_seti_service.h"
#include "scalarproduct.h"
#include "gnunet-service-scalarproduct-ecc.h"
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Data Structures

struct  MpiElement
 An encrypted element key-value pair. More...
 
struct  BobServiceSession
 A scalarproduct session which tracks an offer for a multiplication service by a local client. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "scalarproduct-bob", __VA_ARGS__)
 

Functions

static int free_element_cb (void *cls, const struct GNUNET_HashCode *key, void *value)
 Callback used to free the elements in the map. More...
 
static void destroy_service_session (struct BobServiceSession *s)
 Destroy session state, we are done with it. More...
 
static void prepare_client_end_notification (struct BobServiceSession *session)
 Notify the client that the session has succeeded or failed. More...
 
static void cb_channel_destruction (void *cls, const struct GNUNET_CADET_Channel *channel)
 Function called whenever a channel is destroyed. More...
 
static void bob_cadet_done_cb (void *cls)
 MQ finished giving our last message to CADET, now notify the client that we are finished. More...
 
static void transmit_bobs_cryptodata_message (struct BobServiceSession *s)
 Bob generates the response message to be sent to Alice. More...
 
static int copy_element_cb (void *cls, const struct GNUNET_HashCode *key, void *value)
 Iterator to copy over messages from the hash map into an array for sorting. More...
 
static int element_cmp (const void *a, const void *b)
 Compare two struct MpiValues by key for sorting. More...
 
static int check_alices_cryptodata_message (void *cls, const struct EccAliceCryptodataMessage *msg)
 Check a multipart-chunk of a request from another service to calculate a scalarproduct with us. More...
 
static void handle_alices_cryptodata_message (void *cls, const struct EccAliceCryptodataMessage *msg)
 Handle a multipart-chunk of a request from another service to calculate a scalarproduct with us. More...
 
static void cb_intersection_element_removed (void *cls, const struct GNUNET_SETI_Element *element, uint64_t current_size, enum GNUNET_SETI_Status status)
 Callback for set operation results. More...
 
static void start_intersection (struct BobServiceSession *s)
 We've paired up a client session with an incoming CADET request. More...
 
static void handle_alices_computation_request (void *cls, const struct EccServiceRequestMessage *msg)
 Handle a request from Alice to calculate a scalarproduct with us (Bob). More...
 
static void * cb_channel_incoming (void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *initiator)
 Function called for inbound channels on Bob's end. More...
 
static int check_bob_client_message_multipart (void *cls, const struct ComputationBobCryptodataMultipartMessage *msg)
 We're receiving additional set data. More...
 
static void handle_bob_client_message_multipart (void *cls, const struct ComputationBobCryptodataMultipartMessage *msg)
 We're receiving additional set data. More...
 
static int check_bob_client_message (void *cls, const struct BobComputationMessage *msg)
 Handler for Bob's a client request message. More...
 
static void handle_bob_client_message (void *cls, const struct BobComputationMessage *msg)
 Handler for Bob's a client request message. More...
 
static void shutdown_task (void *cls)
 Task run during shutdown. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 A client connected. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_cls)
 A client disconnected. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Initialization of the program and message handlers. More...
 
 GNUNET_SERVICE_MAIN ("scalarproduct-bob", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(bob_client_message, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_BOB, struct BobComputationMessage, NULL), GNUNET_MQ_hd_var_size(bob_client_message_multipart, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_BOB, struct ComputationBobCryptodataMultipartMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static const struct GNUNET_CONFIGURATION_Handlecfg
 GNUnet configuration handle. More...
 
static struct GNUNET_CADET_Handlemy_cadet
 Handle to the CADET service. More...
 
static struct GNUNET_CRYPTO_EccDlogContextedc
 Context for DLOG operations on a curve. More...
 

Detailed Description

scalarproduct service implementation

Author
Christian M. Fuchs
Christian Grothoff

Definition in file gnunet-service-scalarproduct-ecc_bob.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "scalarproduct-bob", __VA_ARGS__)

Function Documentation

◆ free_element_cb()

static int free_element_cb ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Callback used to free the elements in the map.

Parameters
clsNULL
keykey of the element
valuethe value to free

Definition at line 197 of file gnunet-service-scalarproduct-ecc_bob.c.

References GNUNET_free, GNUNET_OK, and MpiElement::value.

Referenced by destroy_service_session().

200 {
201  struct GNUNET_SCALARPRODUCT_Element *element = value;
202 
203  GNUNET_free (element);
204  return GNUNET_OK;
205 }
static char * value
Value of the record to add/remove.
An element key-value pair for scalarproduct.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ destroy_service_session()

static void destroy_service_session ( struct BobServiceSession s)
static

Destroy session state, we are done with it.

Parameters
sessionthe session to free elements from

Definition at line 214 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::channel, BobServiceSession::client, free_element_cb(), GNUNET_CADET_channel_destroy(), GNUNET_CADET_close_port(), GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_free, GNUNET_SERVICE_client_drop(), GNUNET_SETI_destroy(), GNUNET_SETI_operation_cancel(), GNUNET_YES, BobServiceSession::in_destroy, BobServiceSession::intersected_elements, BobServiceSession::intersection_op, BobServiceSession::intersection_set, BobServiceSession::port, and BobServiceSession::sorted_elements.

Referenced by cb_channel_destruction(), and client_disconnect_cb().

215 {
216  if (GNUNET_YES == s->in_destroy)
217  return;
218  s->in_destroy = GNUNET_YES;
219  if (NULL != s->client)
220  {
221  struct GNUNET_SERVICE_Client *c = s->client;
222 
223  s->client = NULL;
225  }
226  if (NULL != s->intersected_elements)
227  {
230  NULL);
232  s->intersected_elements = NULL;
233  }
234  if (NULL != s->intersection_op)
235  {
237  s->intersection_op = NULL;
238  }
239  if (NULL != s->intersection_set)
240  {
242  s->intersection_set = NULL;
243  }
244  if (NULL != s->sorted_elements)
245  {
247  s->sorted_elements = NULL;
248  }
249  if (NULL != s->port)
250  {
252  s->port = NULL;
253  }
254  if (NULL != s->channel)
255  {
257  s->channel = NULL;
258  }
259  GNUNET_free (s);
260 }
int in_destroy
Are we already in destroy_service_session()?
static int free_element_cb(void *cls, const struct GNUNET_HashCode *key, void *value)
Callback used to free the elements in the map.
struct GNUNET_CADET_Port * port
Our open port.
struct GNUNET_SETI_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
struct MpiElement * sorted_elements
b(Bob)
Handle to a client that is connected to a service.
Definition: service.c:250
void GNUNET_SETI_operation_cancel(struct GNUNET_SETI_OperationHandle *oh)
Cancel the given set operation.
Definition: seti_api.c:335
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
struct GNUNET_CADET_Channel * channel
The CADET channel.
struct GNUNET_SERVICE_Client * client
The client this request is related to.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2325
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
struct GNUNET_SETI_Handle * intersection_set
Set of elements for which we will be conducting an intersection.
void GNUNET_CADET_close_port(struct GNUNET_CADET_Port *p)
Close a port opened with GNUNET_CADET_open_port().
Definition: cadet_api.c:808
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:837
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_SETI_destroy(struct GNUNET_SETI_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: seti_api.c:488
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◆ prepare_client_end_notification()

static void prepare_client_end_notification ( struct BobServiceSession session)
static

Notify the client that the session has succeeded or failed.

This message gets sent to Bob's client if the operation completed or Alice disconnected.

Parameters
sessionthe associated client session to fail or succeed

Definition at line 271 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::client_mq, e, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_RESULT, GNUNET_MQ_msg, GNUNET_MQ_send(), msg, ClientResponseMessage::product_length, ClientResponseMessage::range, BobServiceSession::session_id, BobServiceSession::status, and ClientResponseMessage::status.

Referenced by bob_cadet_done_cb(), cb_channel_destruction(), and cb_intersection_element_removed().

272 {
273  struct ClientResponseMessage *msg;
274  struct GNUNET_MQ_Envelope *e;
275 
276  if (NULL == session->client_mq)
277  return; /* no client left to be notified */
279  "Sending session-end notification with status %d to client for session %s\n",
280  session->status,
281  GNUNET_h2s (&session->session_id));
282  e = GNUNET_MQ_msg (msg,
284  msg->range = 0;
285  msg->product_length = htonl (0);
286  msg->status = htonl (session->status);
287  GNUNET_MQ_send (session->client_mq,
288  e);
289 }
Message type passed from service client to finalize a session as requester or responder.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
struct GNUNET_MQ_Handle * client_mq
Client message queue.
int32_t range
Workaround for libgcrypt: -1 if negative, 0 if zero, else 1.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
static struct Experiment * e
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
uint32_t status
Status information about the outcome of this session, An enum GNUNET_SCALARPRODUCT_ResponseStatus (in...
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
uint32_t product_length
0 if no product attached
#define GNUNET_log(kind,...)
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_RESULT
Alice/Bob -> Client Result.
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◆ cb_channel_destruction()

static void cb_channel_destruction ( void *  cls,
const struct GNUNET_CADET_Channel channel 
)
static

Function called whenever a channel is destroyed.

Should clean up any associated state.

It must NOT call GNUNET_CADET_channel_destroy() on the channel.

Parameters
clsthe struct BobServiceSession
channelconnection to the other end (henceforth invalid)
channel_ctxplace where local state associated with the channel is stored

Definition at line 304 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::channel, destroy_service_session(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_i2s(), GNUNET_log, GNUNET_SCALARPRODUCT_STATUS_ACTIVE, GNUNET_SCALARPRODUCT_STATUS_FAILURE, BobServiceSession::peer, prepare_client_end_notification(), BobServiceSession::s, BobServiceSession::session_id, and BobServiceSession::status.

Referenced by handle_bob_client_message().

306 {
307  struct BobServiceSession *s = cls;
308 
310  "Peer disconnected, terminating session %s with peer %s\n",
311  GNUNET_h2s (&s->session_id),
312  GNUNET_i2s (&s->peer));
313  s->channel = NULL;
315  {
318  }
320 }
Operation is still active (never returned, used internally).
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
A scalarproduct session which tracks an offer for a multiplication service by a local client...
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
struct GNUNET_CADET_Channel * channel
The CADET channel.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
static void prepare_client_end_notification(struct BobServiceSession *session)
Notify the client that the session has succeeded or failed.
static void destroy_service_session(struct BobServiceSession *s)
Destroy session state, we are done with it.
#define GNUNET_log(kind,...)
struct GNUNET_PeerIdentity peer
Originator&#39;s peer identity.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ bob_cadet_done_cb()

static void bob_cadet_done_cb ( void *  cls)
static

MQ finished giving our last message to CADET, now notify the client that we are finished.

Definition at line 328 of file gnunet-service-scalarproduct-ecc_bob.c.

References GNUNET_SCALARPRODUCT_STATUS_SUCCESS, prepare_client_end_notification(), and BobServiceSession::status.

Referenced by transmit_bobs_cryptodata_message().

329 {
330  struct BobServiceSession *session = cls;
331 
334 }
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
static void prepare_client_end_notification(struct BobServiceSession *session)
Notify the client that the session has succeeded or failed.
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◆ transmit_bobs_cryptodata_message()

static void transmit_bobs_cryptodata_message ( struct BobServiceSession s)
static

Bob generates the response message to be sent to Alice.

Parameters
sthe associated requesting session with Alice

Definition at line 343 of file gnunet-service-scalarproduct-ecc_bob.c.

References bob_cadet_done_cb(), BobServiceSession::cadet_mq, EccBobCryptodataMessage::contained_element_count, e, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_BOB_CRYPTODATA, GNUNET_MQ_msg, GNUNET_MQ_notify_sent(), GNUNET_MQ_send(), msg, EccBobCryptodataMessage::prod_g_i_b_i, BobServiceSession::prod_g_i_b_i, EccBobCryptodataMessage::prod_h_i_b_i, and BobServiceSession::prod_h_i_b_i.

Referenced by cb_intersection_element_removed(), and handle_alices_cryptodata_message().

344 {
346  struct GNUNET_MQ_Envelope *e;
347 
349  "Sending response to Alice\n");
350  e = GNUNET_MQ_msg (msg,
352  msg->contained_element_count = htonl (2);
353  msg->prod_g_i_b_i = s->prod_g_i_b_i;
354  msg->prod_h_i_b_i = s->prod_h_i_b_i;
357  s);
359  e);
360 }
struct GNUNET_CRYPTO_EccPoint prod_g_i_b_i
The product of the g_i^{b_i} values.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
static struct Experiment * e
static void bob_cadet_done_cb(void *cls)
MQ finished giving our last message to CADET, now notify the client that we are finished.
void GNUNET_MQ_notify_sent(struct GNUNET_MQ_Envelope *ev, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Call a callback once the envelope has been sent, that is, sending it can not be canceled anymore...
Definition: mq.c:787
struct GNUNET_CRYPTO_EccPoint prod_h_i_b_i
The product of the h_i^{b_i} values.
uint32_t contained_element_count
How many elements this individual message delivers (in NBO), always TWO.
Message type passed from responding service Bob to responding service Alice to complete a request and...
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_BOB_CRYPTODATA
Bob -> Alice ECC crypto data.
#define GNUNET_log(kind,...)
struct GNUNET_CRYPTO_EccPoint prod_h_i_b_i
Product of the h_i^{b_i}.
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
struct GNUNET_CRYPTO_EccPoint prod_g_i_b_i
Product of the g_i^{b_i}.
struct GNUNET_MQ_Handle * cadet_mq
The message queue for this channel.
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◆ copy_element_cb()

static int copy_element_cb ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Iterator to copy over messages from the hash map into an array for sorting.

Parameters
clsthe struct AliceServiceSession *
keythe key (unused)
valuethe struct GNUNET_SCALARPRODUCT_Element *

Definition at line 372 of file gnunet-service-scalarproduct-ecc_bob.c.

References e, GNUNET_ntohll(), GNUNET_OK, MpiElement::key, GNUNET_SCALARPRODUCT_Element::key, BobServiceSession::s, BobServiceSession::sorted_elements, BobServiceSession::used_element_count, MpiElement::value, and GNUNET_SCALARPRODUCT_Element::value.

Referenced by handle_alices_cryptodata_message().

375 {
376  struct BobServiceSession *s = cls;
378 
380  e->value);
382  s->used_element_count++;
383  return GNUNET_OK;
384 }
uint32_t used_element_count
How many elements actually are used for the scalar product.
const struct GNUNET_HashCode * key
Key used to identify matching pairs of values to multiply.
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
static struct Experiment * e
struct MpiElement * sorted_elements
b(Bob)
int64_t value
a_i value, not disclosed to Bob.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
static char * value
Value of the record to add/remove.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
int64_t value
Value to multiply in scalar product, in NBO.
An element key-value pair for scalarproduct.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:53
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◆ element_cmp()

static int element_cmp ( const void *  a,
const void *  b 
)
static

Compare two struct MpiValues by key for sorting.

Parameters
apointer to first struct MpiValue *
bpointer to first struct MpiValue *
Returns
-1 for a < b, 0 for a=b, 1 for a > b. TODO: code duplication with Alice!

Definition at line 396 of file gnunet-service-scalarproduct-ecc_bob.c.

References testconfigure::b, GNUNET_CRYPTO_hash_cmp(), and MpiElement::key.

Referenced by handle_alices_cryptodata_message().

398 {
399  const struct MpiElement *ma = a;
400  const struct MpiElement *mb = b;
401 
402  return GNUNET_CRYPTO_hash_cmp (ma->key,
403  mb->key);
404 }
const struct GNUNET_HashCode * key
Key used to identify matching pairs of values to multiply.
An encrypted element key-value pair.
int GNUNET_CRYPTO_hash_cmp(const struct GNUNET_HashCode *h1, const struct GNUNET_HashCode *h2)
Compare function for HashCodes, producing a total ordering of all hashcodes.
Definition: crypto_hash.c:201
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◆ check_alices_cryptodata_message()

static int check_alices_cryptodata_message ( void *  cls,
const struct EccAliceCryptodataMessage msg 
)
static

Check a multipart-chunk of a request from another service to calculate a scalarproduct with us.

Parameters
clsclosure (set from GNUNET_CADET_connect)
msgthe actual message
Returns
GNUNET_OK to keep the connection open, GNUNET_SYSERR to close it (signal serious error)

Definition at line 417 of file gnunet-service-scalarproduct-ecc_bob.c.

References EccAliceCryptodataMessage::contained_element_count, GNUNET_break_op, GNUNET_CONTAINER_multihashmap_size(), GNUNET_OK, GNUNET_SYSERR, EccAliceCryptodataMessage::header, BobServiceSession::intersected_elements, max, BobServiceSession::s, and GNUNET_MessageHeader::size.

419 {
420  struct BobServiceSession *s = cls;
421  uint32_t contained_elements;
422  size_t msg_length;
423  uint16_t msize;
424  unsigned int max;
425 
426  msize = ntohs (msg->header.size);
427  if (msize <= sizeof(struct EccAliceCryptodataMessage))
428  {
429  GNUNET_break_op (0);
430  return GNUNET_SYSERR;
431  }
432  contained_elements = ntohl (msg->contained_element_count);
433  /* Our intersection may still be ongoing, but this is nevertheless
434  an upper bound on the required array size */
436  msg_length = sizeof(struct EccAliceCryptodataMessage)
437  + contained_elements * sizeof(struct GNUNET_CRYPTO_EccPoint) * 2;
438  if ((msize != msg_length) ||
439  (0 == contained_elements) ||
440  (contained_elements > UINT16_MAX) ||
441  (max < contained_elements + s->cadet_received_element_count))
442  {
443  GNUNET_break_op (0);
444  return GNUNET_SYSERR;
445  }
446  return GNUNET_OK;
447 }
uint32_t contained_element_count
How many elements we appended to this message? In NBO.
Vector of ECC-encrypted values sent by Alice to Bob (after set intersection).
Point on a curve (always for Curve25519) encoded in a format suitable for network transmission (ECDH)...
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define max(x, y)
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_ALICE_CRYPTODATA.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
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◆ handle_alices_cryptodata_message()

static void handle_alices_cryptodata_message ( void *  cls,
const struct EccAliceCryptodataMessage msg 
)
static

Handle a multipart-chunk of a request from another service to calculate a scalarproduct with us.

Parameters
clsclosure (set from GNUNET_CADET_connect)
msgthe actual message

Definition at line 458 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::cadet_received_element_count, BobServiceSession::channel, EccAliceCryptodataMessage::contained_element_count, copy_element_cb(), element_cmp(), GNUNET_assert, GNUNET_CADET_receive_done(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multihashmap_size(), GNUNET_CRYPTO_ecc_add(), GNUNET_CRYPTO_ecc_pmul_mpi(), GNUNET_CRYPTO_ecc_scalar_from_int(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_new_array, GNUNET_OK, BobServiceSession::intersected_elements, BobServiceSession::intersection_op, max, payload, BobServiceSession::prod_g_i_b_i, BobServiceSession::prod_h_i_b_i, BobServiceSession::s, BobServiceSession::sorted_elements, transmit_bobs_cryptodata_message(), BobServiceSession::used_element_count, GNUNET_CRYPTO_EccScalar::v, and MpiElement::value.

460 {
461  struct BobServiceSession *s = cls;
462  const struct GNUNET_CRYPTO_EccPoint *payload;
463  uint32_t contained_elements;
464  unsigned int max;
465  const struct GNUNET_CRYPTO_EccPoint *g_i;
466  const struct GNUNET_CRYPTO_EccPoint *h_i;
467  struct GNUNET_CRYPTO_EccPoint g_i_b_i;
468  struct GNUNET_CRYPTO_EccPoint h_i_b_i;
469 
470  contained_elements = ntohl (msg->contained_element_count);
472  /* sort our vector for the computation */
473  if (NULL == s->sorted_elements)
474  {
475  s->sorted_elements
478  struct MpiElement);
479  s->used_element_count = 0;
482  s);
483  qsort (s->sorted_elements,
485  sizeof(struct MpiElement),
486  &element_cmp);
487  }
488 
490  "Received %u crypto values from Alice\n",
491  (unsigned int) contained_elements);
492  payload = (const struct GNUNET_CRYPTO_EccPoint *) &msg[1];
493 
494  for (unsigned int i = 0; i < contained_elements; i++)
495  {
496  int64_t val = s->sorted_elements[i + s->cadet_received_element_count].value;
497  struct GNUNET_CRYPTO_EccScalar vali;
498 
499  GNUNET_assert (INT64_MIN != val);
500  GNUNET_CRYPTO_ecc_scalar_from_int (val > 0 ? val : -val,
501  &vali);
502  if (val < 0)
503  crypto_core_ed25519_scalar_negate (vali.v,
504  vali.v);
505  g_i = &payload[i * 2];
506  /* g_i_b_i = g_i^vali */
509  &vali,
510  &g_i_b_i));
511  h_i = &payload[i * 2 + 1];
512  /* h_i_b_i = h_i^vali */
515  &vali,
516  &h_i_b_i));
517  if (0 == i + s->cadet_received_element_count)
518  {
519  /* first iteration, nothing to add */
520  s->prod_g_i_b_i = g_i_b_i;
521  s->prod_h_i_b_i = h_i_b_i;
522  }
523  else
524  {
525  /* further iterations, cummulate resulting value */
528  &g_i_b_i,
529  &s->prod_g_i_b_i));
532  &h_i_b_i,
533  &s->prod_h_i_b_i));
534  }
535  }
536  s->cadet_received_element_count += contained_elements;
537  if ((s->cadet_received_element_count == max) &&
538  (NULL == s->intersection_op))
539  {
540  /* intersection has finished also on our side, and
541  we got the full set, so we can proceed with the
542  CADET response(s) */
544  }
546 }
uint32_t contained_element_count
How many elements we appended to this message? In NBO.
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_ecc_add(const struct GNUNET_CRYPTO_EccPoint *a, const struct GNUNET_CRYPTO_EccPoint *b, struct GNUNET_CRYPTO_EccPoint *r)
Add two points on the elliptic curve.
Point on a curve (always for Curve25519) encoded in a format suitable for network transmission (ECDH)...
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
uint32_t used_element_count
How many elements actually are used for the scalar product.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_SETI_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
struct MpiElement * sorted_elements
b(Bob)
int64_t value
a_i value, not disclosed to Bob.
void GNUNET_CRYPTO_ecc_scalar_from_int(int64_t val, struct GNUNET_CRYPTO_EccScalar *r)
Create a scalar from int value.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define max(x, y)
struct GNUNET_CADET_Channel * channel
The CADET channel.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
An encrypted element key-value pair.
static unsigned long long payload
How much data are we currently storing in the database?
uint32_t cadet_received_element_count
Counts the number of values received from Alice by us.
static int element_cmp(const void *a, const void *b)
Compare two struct MpiValues by key for sorting.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
void GNUNET_CADET_receive_done(struct GNUNET_CADET_Channel *channel)
Send an ack on the channel to confirm the processing of a message.
Definition: cadet_api.c:888
static int copy_element_cb(void *cls, const struct GNUNET_HashCode *key, void *value)
Iterator to copy over messages from the hash map into an array for sorting.
A ECC scalar for use in point multiplications.
#define GNUNET_log(kind,...)
static void transmit_bobs_cryptodata_message(struct BobServiceSession *s)
Bob generates the response message to be sent to Alice.
struct GNUNET_CRYPTO_EccPoint prod_h_i_b_i
Product of the h_i^{b_i}.
struct GNUNET_CRYPTO_EccPoint prod_g_i_b_i
Product of the g_i^{b_i}.
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_ecc_pmul_mpi(const struct GNUNET_CRYPTO_EccPoint *p, const struct GNUNET_CRYPTO_EccScalar *val, struct GNUNET_CRYPTO_EccPoint *r)
Multiply the point p on the elliptic curve by val.
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◆ cb_intersection_element_removed()

static void cb_intersection_element_removed ( void *  cls,
const struct GNUNET_SETI_Element element,
uint64_t  current_size,
enum GNUNET_SETI_Status  status 
)
static

Callback for set operation results.

Called for each element that needs to be removed from the result set.

Parameters
clsclosure with the struct BobServiceSession
elementa result element, only valid if status is #GNUNET_SETI_STATUS_OK
current_sizecurrent set size
statuswhat has happened with the set intersection?

Definition at line 559 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::channel, BobServiceSession::client_received_element_count, GNUNET_SETI_Element::data, GNUNET_assert, GNUNET_break, GNUNET_CADET_receive_done(), GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_CONTAINER_multihashmap_size(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_h2s(), GNUNET_ntohll(), GNUNET_SCALARPRODUCT_STATUS_FAILURE, GNUNET_SETI_destroy(), GNUNET_SETI_STATUS_DEL_LOCAL, GNUNET_SETI_STATUS_DONE, GNUNET_SETI_STATUS_FAILURE, GNUNET_YES, BobServiceSession::intersected_elements, BobServiceSession::intersection_op, BobServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, LOG, prepare_client_end_notification(), BobServiceSession::s, BobServiceSession::status, transmit_bobs_cryptodata_message(), and GNUNET_SCALARPRODUCT_Element::value.

563 {
564  struct BobServiceSession *s = cls;
565  struct GNUNET_SCALARPRODUCT_Element *se;
566 
567  switch (status)
568  {
570  /* this element has been removed from the set */
572  element->data);
573  GNUNET_assert (NULL != se);
575  "Removed element with key %s and value %lld\n",
576  GNUNET_h2s (&se->key),
577  (long long) GNUNET_ntohll (se->value));
581  element->data,
582  se));
583  GNUNET_free (se);
584  return;
586  s->intersection_op = NULL;
587  GNUNET_break (NULL == s->intersection_set);
590  "Finished intersection, %d items remain\n",
594  {
595  /* CADET transmission from Alice is also already done,
596  start with our own reply */
598  }
599  return;
601  /* unhandled status code */
603  "Set intersection failed!\n");
604  s->intersection_op = NULL;
605  if (NULL != s->intersection_set)
606  {
608  s->intersection_set = NULL;
609  }
612  return;
613 
614  default:
615  GNUNET_break (0);
616  return;
617  }
618 }
uint32_t client_received_element_count
Already transferred elements (received) for multipart messages from client.
Success, all elements have been sent (and received).
The other peer refused to do the operation with us, or something went wrong.
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_SETI_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.
struct GNUNET_CADET_Channel * channel
The CADET channel.
uint16_t status
See PRISM_STATUS_*-constants.
int GNUNET_CONTAINER_multihashmap_remove(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Remove the given key-value pair from the map.
const void * data
Actual data of the element.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
static void prepare_client_end_notification(struct BobServiceSession *session)
Notify the client that the session has succeeded or failed.
int64_t value
Value to multiply in scalar product, in NBO.
Element should be delete from the result set of the local peer, i.e.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
void GNUNET_CADET_receive_done(struct GNUNET_CADET_Channel *channel)
Send an ack on the channel to confirm the processing of a message.
Definition: cadet_api.c:888
struct GNUNET_SETI_Handle * intersection_set
Set of elements for which we will be conducting an intersection.
static void transmit_bobs_cryptodata_message(struct BobServiceSession *s)
Bob generates the response message to be sent to Alice.
#define LOG(kind,...)
An element key-value pair for scalarproduct.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:53
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_SETI_destroy(struct GNUNET_SETI_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: seti_api.c:488
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◆ start_intersection()

static void start_intersection ( struct BobServiceSession s)
static

We've paired up a client session with an incoming CADET request.

Initiate set intersection work.

Parameters
sclient session to start intersection for

Definition at line 628 of file gnunet-service-scalarproduct-ecc_bob.c.

References GNUNET_CRYPTO_hash(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_SETI_prepare(), BobServiceSession::intersection_op, BobServiceSession::peer, BobServiceSession::session_id, and BobServiceSession::total.

Referenced by handle_alices_computation_request(), and handle_bob_client_message_multipart().

629 {
630  struct GNUNET_HashCode set_sid;
631 
633  sizeof(struct GNUNET_HashCode),
634  &set_sid);
636  "Got session with key %s and %u elements, starting intersection.\n",
637  GNUNET_h2s (&s->session_id),
638  (unsigned int) s->total);
639 
640  s->intersection_op
641  = GNUNET_SETI_prepare (&s->peer,
642  &set_sid,
643  NULL,
644  (struct GNUNET_SETI_Option[]) { { 0 } },
646  s);
647  if (GNUNET_OK !=
649  s->intersection_set))
650  {
651  GNUNET_break (0);
654  return;
655  }
657  s->intersection_set = NULL;
658 }
int GNUNET_SETI_commit(struct GNUNET_SETI_OperationHandle *oh, struct GNUNET_SETI_Handle *set)
Commit a set to be used with a set operation.
Definition: seti_api.c:836
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
Option for set operations.
struct GNUNET_SETI_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
A 512-bit hashcode.
uint32_t total
How many elements will be supplied in total from the client.
static void prepare_client_end_notification(struct BobServiceSession *session)
Notify the client that the session has succeeded or failed.
struct GNUNET_SETI_Handle * intersection_set
Set of elements for which we will be conducting an intersection.
#define GNUNET_log(kind,...)
static void cb_intersection_element_removed(void *cls, const struct GNUNET_SETI_Element *element, uint64_t current_size, enum GNUNET_SETI_Status status)
Callback for set operation results.
struct GNUNET_PeerIdentity peer
Originator&#39;s peer identity.
struct GNUNET_SETI_OperationHandle * GNUNET_SETI_prepare(const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_HashCode *app_id, const struct GNUNET_MessageHeader *context_msg, const struct GNUNET_SETI_Option options[], GNUNET_SETI_ResultIterator result_cb, void *result_cls)
Prepare a set operation to be evaluated with another peer.
Definition: seti_api.c:526
void GNUNET_SETI_destroy(struct GNUNET_SETI_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: seti_api.c:488
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◆ handle_alices_computation_request()

static void handle_alices_computation_request ( void *  cls,
const struct EccServiceRequestMessage msg 
)
static

Handle a request from Alice to calculate a scalarproduct with us (Bob).

Parameters
clsclosure (set from GNUNET_CADET_connect)
msgthe actual message

Definition at line 668 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::client_received_element_count, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, BobServiceSession::s, EccServiceRequestMessage::session_id, BobServiceSession::session_id, start_intersection(), and BobServiceSession::total.

670 {
671  struct BobServiceSession *s = cls;
672 
673  s->session_id = msg->session_id; // ??
675  {
677  "Alice ready, still waiting for Bob client data!\n");
678  return;
679  }
681  "Both ready, launching intersection!\n");
682  start_intersection (s);
683 }
struct GNUNET_HashCode session_id
The transaction/session key used to identify a session.
uint32_t client_received_element_count
Already transferred elements (received) for multipart messages from client.
static void start_intersection(struct BobServiceSession *s)
We&#39;ve paired up a client session with an incoming CADET request.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t total
How many elements will be supplied in total from the client.
#define GNUNET_log(kind,...)
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◆ cb_channel_incoming()

static void* cb_channel_incoming ( void *  cls,
struct GNUNET_CADET_Channel channel,
const struct GNUNET_PeerIdentity initiator 
)
static

Function called for inbound channels on Bob's end.

Does some preliminary initialization, more happens after we get Alice's first message.

Parameters
clsour struct BobServiceSession
channelnew handle to the channel
initiatorpeer that started the channel
Returns
session associated with the channel

Definition at line 697 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::cadet_mq, BobServiceSession::channel, GNUNET_CADET_close_port(), GNUNET_CADET_get_mq(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, BobServiceSession::peer, BobServiceSession::port, and BobServiceSession::s.

Referenced by handle_bob_client_message().

700 {
701  struct BobServiceSession *s = cls;
702 
704  "New incoming channel from peer %s.\n",
705  GNUNET_i2s (initiator));
707  s->port = NULL;
708  s->peer = *initiator;
709  s->channel = channel;
711  return s;
712 }
struct GNUNET_CADET_Port * port
Our open port.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
struct GNUNET_CADET_Channel * channel
The CADET channel.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
#define GNUNET_log(kind,...)
void GNUNET_CADET_close_port(struct GNUNET_CADET_Port *p)
Close a port opened with GNUNET_CADET_open_port().
Definition: cadet_api.c:808
struct GNUNET_PeerIdentity peer
Originator&#39;s peer identity.
struct GNUNET_MQ_Handle * cadet_mq
The message queue for this channel.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
struct GNUNET_MQ_Handle * GNUNET_CADET_get_mq(const struct GNUNET_CADET_Channel *channel)
Obtain the message queue for a connected peer.
Definition: cadet_api.c:1082
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◆ check_bob_client_message_multipart()

static int check_bob_client_message_multipart ( void *  cls,
const struct ComputationBobCryptodataMultipartMessage msg 
)
static

We're receiving additional set data.

Check it is well-formed.

Parameters
clsidentification of the client
msgthe actual message
Returns
GNUNET_OK if msg is well-formed

Definition at line 723 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::client_received_element_count, ComputationBobCryptodataMultipartMessage::element_count_contained, GNUNET_break, GNUNET_OK, GNUNET_SYSERR, ComputationBobCryptodataMultipartMessage::header, BobServiceSession::s, GNUNET_MessageHeader::size, and BobServiceSession::total.

726 {
727  struct BobServiceSession *s = cls;
728  uint32_t contained_count;
729  uint16_t msize;
730 
731  msize = ntohs (msg->header.size);
732  contained_count = ntohl (msg->element_count_contained);
733  if ((msize != (sizeof(struct ComputationBobCryptodataMultipartMessage)
734  + contained_count * sizeof(struct
736  (0 == contained_count) ||
737  (UINT16_MAX < contained_count) ||
739  (s->total < s->client_received_element_count + contained_count))
740  {
741  GNUNET_break (0);
742  return GNUNET_SYSERR;
743  }
744  return GNUNET_OK;
745 }
uint32_t client_received_element_count
Already transferred elements (received) for multipart messages from client.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t total
How many elements will be supplied in total from the client.
struct GNUNET_MessageHeader header
GNUNET message header.
uint32_t element_count_contained
contained elements the vector in payload contains
multipart messages following struct ComputationMessage
An element key-value pair for scalarproduct.

◆ handle_bob_client_message_multipart()

static void handle_bob_client_message_multipart ( void *  cls,
const struct ComputationBobCryptodataMultipartMessage msg 
)
static

We're receiving additional set data.

Add it to our set and if we are done, initiate the transaction.

Parameters
clsidentification of the client
msgthe actual message

Definition at line 756 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::channel, BobServiceSession::client, BobServiceSession::client_received_element_count, GNUNET_SETI_Element::data, ComputationBobCryptodataMultipartMessage::element_count_contained, GNUNET_SETI_Element::element_type, GNUNET_break, GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_memcpy, GNUNET_new, GNUNET_SERVICE_client_continue(), GNUNET_SETI_add_element(), GNUNET_SYSERR, BobServiceSession::intersected_elements, BobServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, BobServiceSession::s, GNUNET_SETI_Element::size, start_intersection(), and BobServiceSession::total.

759 {
760  struct BobServiceSession *s = cls;
761  uint32_t contained_count;
762  const struct GNUNET_SCALARPRODUCT_Element *elements;
763  struct GNUNET_SETI_Element set_elem;
764  struct GNUNET_SCALARPRODUCT_Element *elem;
765 
766  contained_count = ntohl (msg->element_count_contained);
767  elements = (const struct GNUNET_SCALARPRODUCT_Element *) &msg[1];
768  for (uint32_t i = 0; i < contained_count; i++)
769  {
771  GNUNET_memcpy (elem,
772  &elements[i],
773  sizeof(struct GNUNET_SCALARPRODUCT_Element));
774  if (GNUNET_SYSERR ==
776  &elem->key,
777  elem,
779  {
780  GNUNET_break (0);
781  GNUNET_free (elem);
782  continue;
783  }
784  set_elem.data = &elem->key;
785  set_elem.size = sizeof(elem->key);
786  set_elem.element_type = 0;
788  &set_elem,
789  NULL, NULL);
790  }
791  s->client_received_element_count += contained_count;
794  {
795  /* more to come */
797  "Request still partial, waiting for more client data!\n");
798  return;
799  }
800  if (NULL == s->channel)
801  {
802  /* no Alice waiting for this request, wait for Alice */
804  "Client ready, still waiting for Alice!\n");
805  return;
806  }
808  "Both ready, launching intersection!\n");
809  start_intersection (s);
810 }
uint32_t client_received_element_count
Already transferred elements (received) for multipart messages from client.
int GNUNET_SETI_add_element(struct GNUNET_SETI_Handle *set, const struct GNUNET_SETI_Element *element, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Add an element to the given set.
Definition: seti_api.c:447
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
static void start_intersection(struct BobServiceSession *s)
We&#39;ve paired up a client session with an incoming CADET request.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Element stored in a set.
struct GNUNET_CADET_Channel * channel
The CADET channel.
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t total
How many elements will be supplied in total from the client.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
struct GNUNET_SETI_Handle * intersection_set
Set of elements for which we will be conducting an intersection.
#define GNUNET_log(kind,...)
uint32_t element_count_contained
contained elements the vector in payload contains
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
An element key-value pair for scalarproduct.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ check_bob_client_message()

static int check_bob_client_message ( void *  cls,
const struct BobComputationMessage msg 
)
static

Handler for Bob's a client request message.

Check msg is well-formed.

Parameters
clsidentification of the client
msgthe actual message
Returns
GNUNET_OK if msg is well-formed

Definition at line 822 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobComputationMessage::element_count_contained, BobComputationMessage::element_count_total, GNUNET_break, GNUNET_break_op, GNUNET_OK, GNUNET_SCALARPRODUCT_STATUS_INIT, GNUNET_SYSERR, BobComputationMessage::header, BobServiceSession::s, GNUNET_MessageHeader::size, and BobServiceSession::status.

824 {
825  struct BobServiceSession *s = cls;
826  uint32_t contained_count;
827  uint32_t total_count;
828  uint16_t msize;
829 
831  {
832  GNUNET_break (0);
833  return GNUNET_SYSERR;
834  }
835  msize = ntohs (msg->header.size);
836  total_count = ntohl (msg->element_count_total);
837  contained_count = ntohl (msg->element_count_contained);
838  if ((0 == total_count) ||
839  (0 == contained_count) ||
840  (UINT16_MAX < contained_count) ||
841  (msize != (sizeof(struct BobComputationMessage)
842  + contained_count * sizeof(struct
844  {
845  GNUNET_break_op (0);
846  return GNUNET_SYSERR;
847  }
848  return GNUNET_OK;
849 }
uint32_t element_count_total
how many elements the vector in payload contains
Definition: scalarproduct.h:99
struct GNUNET_MessageHeader header
GNUNET message header with type GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_BOB.
Definition: scalarproduct.h:94
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
Operation is still active (never returned, used internally).
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t element_count_contained
contained elements the vector in payload contains
Message type passed from client to service to initiate a request or responder role.
Definition: scalarproduct.h:88
An element key-value pair for scalarproduct.

◆ handle_bob_client_message()

static void handle_bob_client_message ( void *  cls,
const struct BobComputationMessage msg 
)
static

Handler for Bob's a client request message.

Bob is in the response role, keep the values + session and waiting for a matching session or process a waiting request from Alice.

Parameters
clsidentification of the client
msgthe actual message

Definition at line 861 of file gnunet-service-scalarproduct-ecc_bob.c.

References cb_channel_destruction(), cb_channel_incoming(), BobServiceSession::client, BobServiceSession::client_received_element_count, GNUNET_SETI_Element::data, BobComputationMessage::element_count_contained, BobComputationMessage::element_count_total, GNUNET_SETI_Element::element_type, GNUNET_break, GNUNET_CADET_open_port(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_h2s(), GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_ALICE_CRYPTODATA, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_SESSION_INITIALIZATION, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_new, GNUNET_ntohll(), GNUNET_SCALARPRODUCT_STATUS_ACTIVE, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SETI_add_element(), GNUNET_SETI_create(), GNUNET_SYSERR, GNUNET_YES, BobServiceSession::intersected_elements, BobServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, BobServiceSession::port, BobServiceSession::s, BobServiceSession::session_id, BobComputationMessage::session_key, GNUNET_SETI_Element::size, BobServiceSession::status, BobServiceSession::total, BobServiceSession::used_element_count, and MpiElement::value.

863 {
864  struct BobServiceSession *s = cls;
865  struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
866  GNUNET_MQ_hd_fixed_size (alices_computation_request,
869  s),
870  GNUNET_MQ_hd_var_size (alices_cryptodata_message,
873  s),
875  };
876  uint32_t contained_count;
877  uint32_t total_count;
878  const struct GNUNET_SCALARPRODUCT_Element *elements;
879  struct GNUNET_SETI_Element set_elem;
880  struct GNUNET_SCALARPRODUCT_Element *elem;
881 
882  total_count = ntohl (msg->element_count_total);
883  contained_count = ntohl (msg->element_count_contained);
884 
886  s->total = total_count;
887  s->client_received_element_count = contained_count;
888  s->session_id = msg->session_key;
889  elements = (const struct GNUNET_SCALARPRODUCT_Element *) &msg[1];
892  GNUNET_YES);
894  for (uint32_t i = 0; i < contained_count; i++)
895  {
896  if (0 == GNUNET_ntohll (elements[i].value))
897  continue;
899  GNUNET_memcpy (elem,
900  &elements[i],
901  sizeof(struct GNUNET_SCALARPRODUCT_Element));
902  if (GNUNET_SYSERR ==
904  &elem->key,
905  elem,
907  {
908  GNUNET_break (0);
909  GNUNET_free (elem);
910  continue;
911  }
912  set_elem.data = &elem->key;
913  set_elem.size = sizeof(elem->key);
914  set_elem.element_type = 0;
916  &set_elem,
917  NULL, NULL);
918  s->used_element_count++;
919  }
922  "Received client request, opening port %s!\n",
923  GNUNET_h2s (&msg->session_key));
925  &msg->session_key,
927  s,
928  NULL,
930  cadet_handlers);
931  if (NULL == s->port)
932  {
933  GNUNET_break (0);
935  return;
936  }
937 }
Vector of ECC-encrypted values sent by Alice to Bob (after set intersection).
uint32_t client_received_element_count
Already transferred elements (received) for multipart messages from client.
int GNUNET_SETI_add_element(struct GNUNET_SETI_Handle *set, const struct GNUNET_SETI_Element *element, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Add an element to the given set.
Definition: seti_api.c:447
uint32_t used_element_count
How many elements actually are used for the scalar product.
uint32_t element_count_total
how many elements the vector in payload contains
Definition: scalarproduct.h:99
Operation is still active (never returned, used internally).
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
struct GNUNET_CADET_Port * port
Our open port.
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_ALICE_CRYPTODATA
Alice -> Bob ECC crypto data.
static void cb_channel_destruction(void *cls, const struct GNUNET_CADET_Channel *channel)
Function called whenever a channel is destroyed.
static void * cb_channel_incoming(void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *initiator)
Function called for inbound channels on Bob&#39;s end.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_new(type)
Allocate a struct or union of the given type.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
struct GNUNET_CADET_Port * GNUNET_CADET_open_port(struct GNUNET_CADET_Handle *h, const struct GNUNET_HashCode *port, GNUNET_CADET_ConnectEventHandler connects, void *connects_cls, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Open a port to receive incoming MQ-based channels.
Definition: cadet_api.c:970
static char * value
Value of the record to add/remove.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
Element stored in a set.
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
struct GNUNET_SETI_Handle * GNUNET_SETI_create(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create an empty set, supporting the specified operation.
Definition: seti_api.c:399
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t total
How many elements will be supplied in total from the client.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2325
Message handler for a specific message type.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
static const struct GNUNET_CONFIGURATION_Handle * cfg
GNUnet configuration handle.
Message type passed from requesting service Alice to responding service Bob to initiate a request and...
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_SESSION_INITIALIZATION
Alice -> Bob ECC session initialization.
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
uint32_t element_count_contained
contained elements the vector in payload contains
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
All non-0-value&#39;d elements transmitted to us.
struct GNUNET_SETI_Handle * intersection_set
Set of elements for which we will be conducting an intersection.
#define GNUNET_log(kind,...)
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
struct GNUNET_HashCode session_key
the transaction/session key used to identify a session
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
An element key-value pair for scalarproduct.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:53
#define GNUNET_free(ptr)
Wrapper around free.
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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused

Definition at line 946 of file gnunet-service-scalarproduct-ecc_bob.c.

References GNUNET_CADET_disconnect(), GNUNET_CRYPTO_ecc_dlog_release(), GNUNET_ERROR_TYPE_DEBUG, and GNUNET_log.

Referenced by run().

947 {
949  "Shutting down, initiating cleanup.\n");
950  // FIXME: we have to cut our connections to CADET first!
951  if (NULL != my_cadet)
952  {
954  my_cadet = NULL;
955  }
956  if (NULL != edc)
957  {
959  edc = NULL;
960  }
961 }
void GNUNET_CADET_disconnect(struct GNUNET_CADET_Handle *handle)
Disconnect from the cadet service.
Definition: cadet_api.c:775
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
void GNUNET_CRYPTO_ecc_dlog_release(struct GNUNET_CRYPTO_EccDlogContext *dlc)
Release precalculated values.
#define GNUNET_log(kind,...)
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◆ client_connect_cb()

static void* client_connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

A client connected.

Setup the associated data structure.

Parameters
clsclosure, NULL
clientidentification of the client
mqmessage queue to communicate with client
Returns
our struct BobServiceSession

Definition at line 975 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::client, BobServiceSession::client_mq, GNUNET_new, mq, and BobServiceSession::s.

Referenced by run().

978 {
979  struct BobServiceSession *s;
980 
981  s = GNUNET_new (struct BobServiceSession);
982  s->client = client;
983  s->client_mq = mq;
984  return s;
985 }
struct GNUNET_MQ_Handle * client_mq
Client message queue.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
A scalarproduct session which tracks an offer for a multiplication service by a local client...
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
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◆ client_disconnect_cb()

static void client_disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_cls 
)
static

A client disconnected.

Remove the associated session(s), release data structures and cancel pending outgoing transmissions to the client.

Parameters
clsclosure, NULL
clientidentification of the client
app_clsour struct BobServiceSession

Definition at line 999 of file gnunet-service-scalarproduct-ecc_bob.c.

References BobServiceSession::client, destroy_service_session(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, and BobServiceSession::s.

Referenced by run().

1002 {
1003  struct BobServiceSession *s = app_cls;
1004 
1006  "Client disconnected from us.\n");
1007  s->client = NULL;
1009 }
A scalarproduct session which tracks an offer for a multiplication service by a local client...
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
static void destroy_service_session(struct BobServiceSession *s)
Destroy session state, we are done with it.
#define GNUNET_log(kind,...)
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_SERVICE_Handle service 
)
static

Initialization of the program and message handlers.

Parameters
clsclosure
cconfiguration to use
servicethe initialized service

Definition at line 1020 of file gnunet-service-scalarproduct-ecc_bob.c.

References _, client_connect_cb(), client_disconnect_cb(), GNUNET_CADET_connect(), GNUNET_CRYPTO_ecc_dlog_prepare(), GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_BOB, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_BOB, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, and shutdown_task().

1023 {
1024  cfg = c;
1025  /* We don't really do DLOG, so we can setup with very minimal resources */
1026  edc = GNUNET_CRYPTO_ecc_dlog_prepare (4 /* max value */,
1027  2 /* RAM */);
1030  NULL);
1031  if (NULL == my_cadet)
1032  {
1034  _ ("Connect to CADET failed\n"));
1036  return;
1037  }
1038 }
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1331
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
struct GNUNET_CRYPTO_EccDlogContext * GNUNET_CRYPTO_ecc_dlog_prepare(unsigned int max, unsigned int mem)
Do pre-calculation for ECC discrete logarithm for small factors.
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_CADET_Handle * GNUNET_CADET_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the MQ-based cadet service.
Definition: cadet_api.c:910
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
static const struct GNUNET_CONFIGURATION_Handle * cfg
GNUnet configuration handle.
#define GNUNET_log(kind,...)
static void shutdown_task(void *cls)
Task run during shutdown.
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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "scalarproduct-bob"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_var_size(bob_client_message, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_BOB, struct BobComputationMessage, NULL)  ,
GNUNET_MQ_hd_var_size(bob_client_message_multipart, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_BOB, struct ComputationBobCryptodataMultipartMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

GNUnet configuration handle.

Definition at line 176 of file gnunet-service-scalarproduct-ecc_bob.c.

◆ my_cadet

struct GNUNET_CADET_Handle* my_cadet
static

Handle to the CADET service.

Definition at line 181 of file gnunet-service-scalarproduct-ecc_bob.c.

◆ edc

struct GNUNET_CRYPTO_EccDlogContext* edc
static

Context for DLOG operations on a curve.

Definition at line 186 of file gnunet-service-scalarproduct-ecc_bob.c.