GNUnet  0.11.x
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gnunet-service-scalarproduct-ecc_alice.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_set_service.h"
#include "scalarproduct.h"
#include "gnunet-service-scalarproduct-ecc.h"
Include dependency graph for gnunet-service-scalarproduct-ecc_alice.c:

Go to the source code of this file.

Data Structures

struct  MpiElement
 An encrypted element key-value pair. More...
 
struct  AliceServiceSession
 A scalarproduct session which tracks a request form the client to our final response. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "scalarproduct-alice", __VA_ARGS__)
 
#define MAX_RESULT   (1024 * 1024)
 Maximum allowed result value for the scalarproduct computation. More...
 
#define MAX_RAM   (1024)
 How many values should DLOG store in memory (determines baseline RAM consumption, roughly 100 bytes times the value given here). More...
 
#define ELEMENT_CAPACITY
 Maximum number of elements we can put into a single cryptodata message. More...
 

Functions

static int free_element_cb (void *cls, const struct GNUNET_HashCode *key, void *value)
 Iterator called to free elements. More...
 
static void destroy_service_session (struct AliceServiceSession *s)
 Destroy session state, we are done with it. More...
 
static void prepare_client_end_notification (struct AliceServiceSession *session)
 Notify the client that the session has failed. More...
 
static void transmit_client_response (struct AliceServiceSession *s)
 Prepare the final (positive) response we will send to Alice's client. More...
 
static void cb_channel_destruction (void *cls, const struct GNUNET_CADET_Channel *channel)
 Function called whenever a channel is destroyed. More...
 
static gcry_mpi_t compute_scalar_product (struct AliceServiceSession *session, gcry_mpi_point_t prod_g_i_b_i, gcry_mpi_point_t prod_h_i_b_i)
 Compute our scalar product, done by Alice. More...
 
static void handle_bobs_cryptodata_message (void *cls, const struct EccBobCryptodataMessage *msg)
 Handle a response we got from another service we wanted to calculate a scalarproduct with. 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 void send_alices_cryptodata_message (struct AliceServiceSession *s)
 Send the cryptographic data from Alice to Bob. More...
 
static void cb_intersection_element_removed (void *cls, const struct GNUNET_SET_Element *element, uint64_t current_size, enum GNUNET_SET_Status status)
 Callback for set operation results. More...
 
static void cb_intersection_request_alice (void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SET_Request *request)
 Called when another peer wants to do a set operation with the local peer. More...
 
static void client_request_complete_alice (struct AliceServiceSession *s)
 Our client has finished sending us its multipart message. More...
 
static int check_alice_client_message_multipart (void *cls, const struct ComputationBobCryptodataMultipartMessage *msg)
 We're receiving additional set data. More...
 
static void handle_alice_client_message_multipart (void *cls, const struct ComputationBobCryptodataMultipartMessage *msg)
 We're receiving additional set data. More...
 
static int check_alice_client_message (void *cls, const struct AliceComputationMessage *msg)
 Handler for Alice's client request message. More...
 
static void handle_alice_client_message (void *cls, const struct AliceComputationMessage *msg)
 Handler for Alice's 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-alice", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(alice_client_message, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_ALICE, struct AliceComputationMessage, NULL), GNUNET_MQ_hd_var_size(alice_client_message_multipart, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_ALICE, 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_CRYPTO_EccDlogContextedc
 Context for DLOG operations on a curve. More...
 
static gcry_mpi_t my_privkey
 Alice's private key ('a'). More...
 
static gcry_mpi_t my_privkey_inv
 Inverse of Alice's private key ('a_inv'). More...
 
static struct GNUNET_CADET_Handlemy_cadet
 Handle to the CADET service. More...
 

Detailed Description

scalarproduct service implementation

Author
Christian M. Fuchs
Christian Grothoff

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

Macro Definition Documentation

◆ LOG

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

◆ MAX_RESULT

#define MAX_RESULT   (1024 * 1024)

Maximum allowed result value for the scalarproduct computation.

DLOG will fail if the result is bigger. At 1 million, the precomputation takes about 2s on a fast machine.

Definition at line 47 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by run().

◆ MAX_RAM

#define MAX_RAM   (1024)

How many values should DLOG store in memory (determines baseline RAM consumption, roughly 100 bytes times the value given here).

Should be about SQRT (MAX_RESULT), larger values will make the online computation faster.

Definition at line 55 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by run().

◆ ELEMENT_CAPACITY

#define ELEMENT_CAPACITY
Value:
- sizeof(struct EccAliceCryptodataMessage)) \
/ sizeof(struct GNUNET_CRYPTO_EccPoint))
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)...
#define GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE
Maximum message size that can be sent on CADET.

Maximum number of elements we can put into a single cryptodata message.

Definition at line 561 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by send_alices_cryptodata_message().

Function Documentation

◆ free_element_cb()

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

Iterator called to free elements.

Parameters
clsthe struct AliceServiceSession * (unused)
keythe key (unused)
valuevalue to free
Returns
GNUNET_OK (continue to iterate)

Definition at line 215 of file gnunet-service-scalarproduct-ecc_alice.c.

References e, GNUNET_free, GNUNET_OK, and MpiElement::value.

Referenced by destroy_service_session().

216 {
218 
219  GNUNET_free (e);
220  return GNUNET_OK;
221 }
static struct Experiment * e
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
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 AliceServiceSession s)
static

Destroy session state, we are done with it.

Parameters
sthe session to free elements from

Definition at line 230 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::channel, AliceServiceSession::client, free_element_cb(), GNUNET_CADET_channel_destroy(), GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_SERVICE_client_drop(), GNUNET_SET_destroy(), GNUNET_SET_listen_cancel(), GNUNET_SET_operation_cancel(), GNUNET_YES, AliceServiceSession::in_destroy, AliceServiceSession::intersected_elements, AliceServiceSession::intersection_listen, AliceServiceSession::intersection_op, AliceServiceSession::intersection_set, LOG, AliceServiceSession::product, AliceServiceSession::sorted_elements, AliceServiceSession::used_element_count, and MpiElement::value.

Referenced by client_disconnect_cb(), and handle_bobs_cryptodata_message().

231 {
232  unsigned int i;
233 
234  if (GNUNET_YES == s->in_destroy)
235  return;
236  s->in_destroy = GNUNET_YES;
237  if (NULL != s->client)
238  {
239  struct GNUNET_SERVICE_Client *c = s->client;
240 
241  s->client = NULL;
243  }
244  if (NULL != s->channel)
245  {
247  s->channel = NULL;
248  }
249  if (NULL != s->intersected_elements)
250  {
253  s);
255  s->intersected_elements = NULL;
256  }
257  if (NULL != s->intersection_listen)
258  {
260  s->intersection_listen = NULL;
261  }
262  if (NULL != s->intersection_op)
263  {
264  LOG (GNUNET_ERROR_TYPE_DEBUG, "Set intersection, op still ongoing!\n");
266  s->intersection_op = NULL;
267  }
268  if (NULL != s->intersection_set)
269  {
271  s->intersection_set = NULL;
272  }
273  if (NULL != s->sorted_elements)
274  {
275  for (i = 0; i < s->used_element_count; i++)
276  gcry_mpi_release (s->sorted_elements[i].value);
278  s->sorted_elements = NULL;
279  }
280  if (NULL != s->product)
281  {
282  gcry_mpi_release (s->product);
283  s->product = NULL;
284  }
285  GNUNET_free (s);
286 }
int in_destroy
Flag to prevent recursive calls to destroy_service_session() from doing harm.
struct GNUNET_CADET_Channel * channel
channel-handle associated with our cadet handle
gcry_mpi_t value
a_i value, not disclosed to Bob.
struct GNUNET_SET_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
Handle to a client that is connected to a service.
Definition: service.c:250
void GNUNET_SET_destroy(struct GNUNET_SET_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: set_api.c:772
struct MpiElement * sorted_elements
a(Alice), sorted array by key of length used_element_count.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2324
static int free_element_cb(void *cls, const struct GNUNET_HashCode *key, void *value)
Iterator called to free elements.
void GNUNET_SET_listen_cancel(struct GNUNET_SET_ListenHandle *lh)
Cancel the given listen operation.
Definition: set_api.c:1051
uint32_t used_element_count
How many elements actually are used for the scalar product.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
gcry_mpi_t product
The computed scalar.
void GNUNET_SET_operation_cancel(struct GNUNET_SET_OperationHandle *oh)
Cancel the given set operation.
Definition: set_api.c:516
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_SET_Handle * intersection_set
Set of elements for which will conduction an intersection.
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_SET_ListenHandle * intersection_listen
Handle to Alice&#39;s Intersection operation listening for Bob.
#define LOG(kind,...)
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:903
#define GNUNET_free(ptr)
Wrapper around free.
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◆ prepare_client_end_notification()

static void prepare_client_end_notification ( struct AliceServiceSession session)
static

Notify the client that the session has failed.

A message gets sent to Alice's client if we encountered any error.

Parameters
sessionthe associated client session to fail or succeed

Definition at line 296 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::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, AliceServiceSession::session_id, AliceServiceSession::status, and ClientResponseMessage::status.

Referenced by cb_channel_destruction(), cb_intersection_element_removed(), cb_intersection_request_alice(), client_request_complete_alice(), and transmit_client_response().

297 {
298  struct ClientResponseMessage *msg;
299  struct GNUNET_MQ_Envelope *e;
300 
301  if (NULL == session->client_mq)
302  return; /* no client left to be notified */
303  GNUNET_log (
305  "Sending session-end notification with status %d to client for session %s\n",
306  session->status,
307  GNUNET_h2s (&session->session_id));
309  msg->product_length = htonl (0);
310  msg->status = htonl (session->status);
311  GNUNET_MQ_send (session->client_mq, e);
312 }
Message type passed from service client to finalize a session as requester or responder.
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
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
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:353
struct GNUNET_MQ_Handle * client_mq
The message queue for the client.
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_RESULT
Alice/Bob -> Client Result.
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◆ transmit_client_response()

static void transmit_client_response ( struct AliceServiceSession s)
static

Prepare the final (positive) response we will send to Alice's client.

Parameters
sthe session associated with our client.

Definition at line 322 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::client_mq, e, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_h2s(), GNUNET_log, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_RESULT, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_SCALARPRODUCT_STATUS_SUCCESS, LOG_GCRY, msg, prepare_client_end_notification(), AliceServiceSession::product, ClientResponseMessage::product_length, ClientResponseMessage::range, AliceServiceSession::session_id, ClientResponseMessage::status, and MpiElement::value.

Referenced by handle_bobs_cryptodata_message().

323 {
324  struct ClientResponseMessage *msg;
325  struct GNUNET_MQ_Envelope *e;
326  unsigned char *product_exported = NULL;
327  size_t product_length = 0;
328  int32_t range;
329  gcry_error_t rc;
330  int sign;
331  gcry_mpi_t value;
332 
333  if (NULL == s->product)
334  {
335  GNUNET_break (0);
337  return;
338  }
339  value = gcry_mpi_new (0);
340  sign = gcry_mpi_cmp_ui (s->product, 0);
341  if (0 > sign)
342  {
343  range = -1;
344  gcry_mpi_sub (value, value, s->product);
345  }
346  else if (0 < sign)
347  {
348  range = 1;
349  gcry_mpi_add (value, value, s->product);
350  }
351  else
352  {
353  /* result is exactly zero */
354  range = 0;
355  }
356  gcry_mpi_release (s->product);
357  s->product = NULL;
358 
359  if ((0 != range) && (0 != (rc = gcry_mpi_aprint (GCRYMPI_FMT_STD,
360  &product_exported,
361  &product_length,
362  value))))
363  {
364  LOG_GCRY (GNUNET_ERROR_TYPE_ERROR, "gcry_mpi_scan", rc);
366  return;
367  }
368  gcry_mpi_release (value);
369  e = GNUNET_MQ_msg_extra (msg,
370  product_length,
373  msg->range = htonl (range);
374  msg->product_length = htonl (product_length);
375  if (NULL != product_exported)
376  {
377  GNUNET_memcpy (&msg[1], product_exported, product_length);
378  GNUNET_free (product_exported);
379  }
380  GNUNET_MQ_send (s->client_mq, e);
382  "Sent result to client, session %s has ended!\n",
383  GNUNET_h2s (&s->session_id));
384 }
Message type passed from service client to finalize a session as requester or responder.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
int32_t range
Workaround for libgcrypt: -1 if negative, 0 if zero, else 1.
#define LOG_GCRY(level, cmd, rc)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
Definition: scalarproduct.h:35
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
static struct Experiment * e
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...
uint32_t status
Status information about the outcome of this session, An enum GNUNET_SCALARPRODUCT_ResponseStatus (in...
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
static char * value
Value of the record to add/remove.
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
uint32_t product_length
0 if no product attached
gcry_mpi_t product
The computed scalar.
#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:353
struct GNUNET_MQ_Handle * client_mq
The message queue for the client.
static void prepare_client_end_notification(struct AliceServiceSession *session)
Notify the client that the session has failed.
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_RESULT
Alice/Bob -> Client Result.
#define GNUNET_free(ptr)
Wrapper around free.
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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 AliceServiceSession
channelconnection to the other end (henceforth invalid)

Definition at line 397 of file gnunet-service-scalarproduct-ecc_alice.c.

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

Referenced by client_request_complete_alice().

398 {
399  struct AliceServiceSession *s = cls;
400 
402  "Peer disconnected, terminating session %s with peer %s\n",
403  GNUNET_h2s (&s->session_id),
404  GNUNET_i2s (&s->peer));
405  s->channel = NULL;
407  {
408  /* We didn't get an answer yet, fail with error */
411  }
412 }
A scalarproduct session which tracks a request form the client to our final response.
struct GNUNET_CADET_Channel * channel
channel-handle associated with our cadet handle
Operation is still active (never returned, used internally).
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
struct GNUNET_PeerIdentity peer
Alice or Bob&#39;s peerID.
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
#define GNUNET_log(kind,...)
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
static void prepare_client_end_notification(struct AliceServiceSession *session)
Notify the client that the session has failed.
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◆ compute_scalar_product()

static gcry_mpi_t compute_scalar_product ( struct AliceServiceSession session,
gcry_mpi_point_t  prod_g_i_b_i,
gcry_mpi_point_t  prod_h_i_b_i 
)
static

Compute our scalar product, done by Alice.

Parameters
sessionthe session associated with this computation
prod_g_i_b_ivalue from Bob
prod_h_i_b_ivalue from Bob
Returns
product as MPI, never NULL

Definition at line 424 of file gnunet-service-scalarproduct-ecc_alice.c.

References GNUNET_CRYPTO_ecc_add(), GNUNET_CRYPTO_ecc_dlog(), GNUNET_CRYPTO_ecc_pmul_mpi(), GNUNET_ERROR_TYPE_ERROR, GNUNET_log, INT_MAX, my_privkey_inv, and ret.

Referenced by handle_bobs_cryptodata_message().

427 {
428  gcry_mpi_point_t g_i_b_i_a_inv;
429  gcry_mpi_point_t g_ai_bi;
430  int ai_bi;
431  gcry_mpi_t ret;
432 
433  g_i_b_i_a_inv =
435  g_ai_bi = GNUNET_CRYPTO_ecc_add (edc, g_i_b_i_a_inv, prod_h_i_b_i);
436  gcry_mpi_point_release (g_i_b_i_a_inv);
437  ai_bi = GNUNET_CRYPTO_ecc_dlog (edc, g_ai_bi);
438  gcry_mpi_point_release (g_ai_bi);
439  if (INT_MAX == ai_bi)
440  {
441  /* result too big */
443  "Scalar product result out of range\n");
444  return NULL;
445  }
446  ret = gcry_mpi_new (0);
447  if (ai_bi > 0)
448  {
449  gcry_mpi_set_ui (ret, ai_bi);
450  }
451  else
452  {
453  gcry_mpi_set_ui (ret, -ai_bi);
454  gcry_mpi_neg (ret, ret);
455  }
456  return ret;
457 }
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
#define INT_MAX
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
gcry_mpi_point_t GNUNET_CRYPTO_ecc_add(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_point_t a, gcry_mpi_point_t b)
Add two points on the elliptic curve.
#define GNUNET_log(kind,...)
static gcry_mpi_t my_privkey_inv
Inverse of Alice&#39;s private key (&#39;a_inv&#39;).
int GNUNET_CRYPTO_ecc_dlog(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_point_t input)
Calculate ECC discrete logarithm for small factors.
gcry_mpi_point_t GNUNET_CRYPTO_ecc_pmul_mpi(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_point_t p, gcry_mpi_t val)
Multiply the point p on the elliptic curve by val.
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◆ handle_bobs_cryptodata_message()

static void handle_bobs_cryptodata_message ( void *  cls,
const struct EccBobCryptodataMessage msg 
)
static

Handle a response we got from another service we wanted to calculate a scalarproduct with.

Parameters
clsthe struct AliceServiceSession *
msgthe actual message

Definition at line 468 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::channel, AliceServiceSession::client_received_element_count, compute_scalar_product(), EccBobCryptodataMessage::contained_element_count, destroy_service_session(), GNUNET_break_op, GNUNET_CADET_receive_done(), GNUNET_CRYPTO_ecc_bin_to_point(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, EccBobCryptodataMessage::prod_g_i_b_i, EccBobCryptodataMessage::prod_h_i_b_i, AliceServiceSession::product, AliceServiceSession::s, AliceServiceSession::sorted_elements, AliceServiceSession::total, and transmit_client_response().

470 {
471  struct AliceServiceSession *s = cls;
472  gcry_mpi_point_t prod_g_i_b_i;
473  gcry_mpi_point_t prod_h_i_b_i;
474  uint32_t contained;
475 
476  contained = ntohl (msg->contained_element_count);
477  if (2 != contained)
478  {
479  GNUNET_break_op (0);
481  return;
482  }
483  if (NULL == s->sorted_elements)
484  {
485  /* we're not ready yet, how can Bob be? */
486  GNUNET_break_op (0);
488  return;
489  }
491  {
492  /* we're not ready yet, how can Bob be? */
493  GNUNET_break_op (0);
495  return;
496  }
497 
499  "Received %u crypto values from Bob\n",
500  (unsigned int) contained);
502  prod_g_i_b_i = GNUNET_CRYPTO_ecc_bin_to_point (edc, &msg->prod_g_i_b_i);
503  prod_h_i_b_i = GNUNET_CRYPTO_ecc_bin_to_point (edc, &msg->prod_h_i_b_i);
504  s->product = compute_scalar_product (s, prod_g_i_b_i, prod_h_i_b_i);
505  gcry_mpi_point_release (prod_g_i_b_i);
506  gcry_mpi_point_release (prod_h_i_b_i);
508 }
A scalarproduct session which tracks a request form the client to our final response.
struct GNUNET_CRYPTO_EccPoint prod_g_i_b_i
The product of the g_i^{b_i} values.
gcry_mpi_point_t GNUNET_CRYPTO_ecc_bin_to_point(struct GNUNET_CRYPTO_EccDlogContext *edc, const struct GNUNET_CRYPTO_EccPoint *bin)
Convert binary representation of a point to computational representation.
struct GNUNET_CADET_Channel * channel
channel-handle associated with our cadet handle
uint32_t total
How many elements we were supplied with from the client (total count before intersection).
static void transmit_client_response(struct AliceServiceSession *s)
Prepare the final (positive) response we will send to Alice&#39;s client.
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
struct MpiElement * sorted_elements
a(Alice), sorted array by key of length used_element_count.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
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.
gcry_mpi_t product
The computed scalar.
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:954
static gcry_mpi_t compute_scalar_product(struct AliceServiceSession *session, gcry_mpi_point_t prod_g_i_b_i, gcry_mpi_point_t prod_h_i_b_i)
Compute our scalar product, done by Alice.
#define GNUNET_log(kind,...)
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t client_received_element_count
Already transferred elements from client to us.
static void destroy_service_session(struct AliceServiceSession *s)
Destroy session state, we are done with it.
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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 520 of file gnunet-service-scalarproduct-ecc_alice.c.

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

Referenced by send_alices_cryptodata_message().

521 {
522  struct AliceServiceSession *s = cls;
524  gcry_mpi_t mval;
525  int64_t val;
526 
527  mval = gcry_mpi_new (0);
528  val = (int64_t) GNUNET_ntohll (e->value);
529  if (0 > val)
530  gcry_mpi_sub_ui (mval, mval, -val);
531  else
532  gcry_mpi_add_ui (mval, mval, val);
535  s->used_element_count++;
536  return GNUNET_OK;
537 }
A scalarproduct session which tracks a request form the client to our final response.
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
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
gcry_mpi_t value
a_i value, not disclosed to Bob.
struct MpiElement * sorted_elements
a(Alice), sorted array by key of length used_element_count.
static char * value
Value of the record to add/remove.
int64_t value
Value to multiply in scalar product, in NBO.
uint32_t used_element_count
How many elements actually are used for the scalar product.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
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:48
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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.

Definition at line 548 of file gnunet-service-scalarproduct-ecc_alice.c.

References GNUNET_CRYPTO_hash_cmp(), and MpiElement::key.

Referenced by send_alices_cryptodata_message().

549 {
550  const struct MpiElement *ma = a;
551  const struct MpiElement *mb = b;
552 
553  return GNUNET_CRYPTO_hash_cmp (ma->key, mb->key);
554 }
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:294
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◆ send_alices_cryptodata_message()

static void send_alices_cryptodata_message ( struct AliceServiceSession s)
static

Send the cryptographic data from Alice to Bob.

Does nothing if we already transferred all elements.

Parameters
sthe associated service session

Definition at line 574 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::cadet_mq, EccAliceCryptodataMessage::contained_element_count, copy_element_cb(), e, ELEMENT_CAPACITY, element_cmp(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multihashmap_size(), GNUNET_CRYPTO_ecc_dexp_mpi(), GNUNET_CRYPTO_ecc_point_to_bin(), GNUNET_CRYPTO_ecc_random_mod_n(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_ALICE_CRYPTODATA, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_new_array, AliceServiceSession::intersected_elements, LOG, msg, my_privkey, payload, AliceServiceSession::sorted_elements, AliceServiceSession::used_element_count, and MpiElement::value.

Referenced by cb_intersection_element_removed().

575 {
577  struct GNUNET_MQ_Envelope *e;
579  gcry_mpi_t r_ia;
580  gcry_mpi_t r_ia_ai;
581  unsigned int i;
582  unsigned int off;
583  unsigned int todo_count;
584 
587  struct MpiElement);
588  s->used_element_count = 0;
591  s);
593  "Finished intersection, %d items remain\n",
594  s->used_element_count);
595  qsort (s->sorted_elements,
597  sizeof(struct MpiElement),
598  &element_cmp);
599  off = 0;
600  while (off < s->used_element_count)
601  {
602  todo_count = s->used_element_count - off;
603  if (todo_count > ELEMENT_CAPACITY)
604  todo_count = ELEMENT_CAPACITY;
606  "Sending %u/%u crypto values to Bob\n",
607  (unsigned int) todo_count,
608  (unsigned int) s->used_element_count);
609 
610  e =
611  GNUNET_MQ_msg_extra (msg,
612  todo_count * 2
613  * sizeof(struct GNUNET_CRYPTO_EccPoint),
615  msg->contained_element_count = htonl (todo_count);
616  payload = (struct GNUNET_CRYPTO_EccPoint *) &msg[1];
617  r_ia = gcry_mpi_new (0);
618  r_ia_ai = gcry_mpi_new (0);
619  for (i = off; i < off + todo_count; i++)
620  {
621  gcry_mpi_t r_i;
622  gcry_mpi_point_t g_i;
623  gcry_mpi_point_t h_i;
624 
626  g_i = GNUNET_CRYPTO_ecc_dexp_mpi (edc, r_i);
627  /* r_ia = r_i * a */
628  gcry_mpi_mul (r_ia, r_i, my_privkey);
629  gcry_mpi_release (r_i);
630  /* r_ia_ai = r_ia + a_i */
631  gcry_mpi_add (r_ia_ai, r_ia, s->sorted_elements[i].value);
632  h_i = GNUNET_CRYPTO_ecc_dexp_mpi (edc, r_ia_ai);
633  GNUNET_CRYPTO_ecc_point_to_bin (edc, g_i, &payload[(i - off) * 2]);
634  GNUNET_CRYPTO_ecc_point_to_bin (edc, h_i, &payload[(i - off) * 2 + 1]);
635  gcry_mpi_point_release (g_i);
636  gcry_mpi_point_release (h_i);
637  }
638  gcry_mpi_release (r_ia);
639  gcry_mpi_release (r_ia_ai);
640  off += todo_count;
641  GNUNET_MQ_send (s->cadet_mq, e);
642  }
643 }
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)...
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
struct GNUNET_MQ_Handle * cadet_mq
The message queue for CADET.
unsigned int GNUNET_CONTAINER_multihashmap_size(const struct GNUNET_CONTAINER_MultiHashMap *map)
Get the number of key-value pairs in the map.
gcry_mpi_t GNUNET_CRYPTO_ecc_random_mod_n(struct GNUNET_CRYPTO_EccDlogContext *edc)
Generate a random value mod n.
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.
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_ALICE_CRYPTODATA
Alice -> Bob ECC crypto data.
static struct Experiment * e
gcry_mpi_t value
a_i value, not disclosed to Bob.
void GNUNET_CRYPTO_ecc_point_to_bin(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_point_t point, struct GNUNET_CRYPTO_EccPoint *bin)
Convert point value to binary representation.
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
struct MpiElement * sorted_elements
a(Alice), sorted array by key of length used_element_count.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
An encrypted element key-value pair.
static gcry_mpi_t my_privkey
Alice&#39;s private key (&#39;a&#39;).
static unsigned long long payload
How much data are we currently storing in the database?
gcry_mpi_point_t GNUNET_CRYPTO_ecc_dexp_mpi(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_t val)
Multiply the generator g of the elliptic curve by val to obtain the point on the curve representing v...
uint32_t used_element_count
How many elements actually are used for the scalar product.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
#define GNUNET_log(kind,...)
#define ELEMENT_CAPACITY
Maximum number of elements we can put into a single cryptodata message.
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:353
#define LOG(kind,...)
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
static int element_cmp(const void *a, const void *b)
Compare two struct MpiValues by key for sorting.
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◆ cb_intersection_element_removed()

static void cb_intersection_element_removed ( void *  cls,
const struct GNUNET_SET_Element element,
uint64_t  current_size,
enum GNUNET_SET_Status  status 
)
static

Callback for set operation results.

Called for each element that should be removed from the result set, and then once to indicate that the set intersection operation is done.

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

Definition at line 657 of file gnunet-service-scalarproduct-ecc_alice.c.

References GNUNET_SET_Element::data, GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_h2s(), GNUNET_ntohll(), GNUNET_SCALARPRODUCT_STATUS_FAILURE, GNUNET_SET_destroy(), GNUNET_SET_listen_cancel(), GNUNET_SET_STATUS_DONE, GNUNET_SET_STATUS_FAILURE, GNUNET_SET_STATUS_HALF_DONE, GNUNET_SET_STATUS_OK, GNUNET_YES, AliceServiceSession::intersected_elements, AliceServiceSession::intersection_listen, AliceServiceSession::intersection_op, AliceServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, LOG, prepare_client_end_notification(), AliceServiceSession::s, send_alices_cryptodata_message(), AliceServiceSession::status, and GNUNET_SCALARPRODUCT_Element::value.

Referenced by cb_intersection_request_alice().

661 {
662  struct AliceServiceSession *s = cls;
663  struct GNUNET_SCALARPRODUCT_Element *se;
664 
665  switch (status)
666  {
668  /* this element has been removed from the set */
670  element->data);
671  GNUNET_assert (NULL != se);
673  "Intersection removed element with key %s and value %lld\n",
674  GNUNET_h2s (&se->key),
675  (long long) GNUNET_ntohll (se->value));
676  GNUNET_assert (
677  GNUNET_YES ==
679  element->data,
680  se));
681  GNUNET_free (se);
682  return;
683 
685  s->intersection_op = NULL;
686  if (NULL != s->intersection_set)
687  {
689  s->intersection_set = NULL;
690  }
692  return;
693 
695  /* unexpected for intersection */
696  GNUNET_break (0);
697  return;
698 
700  /* unhandled status code */
701  LOG (GNUNET_ERROR_TYPE_DEBUG, "Set intersection failed!\n");
702  if (NULL != s->intersection_listen)
703  {
705  s->intersection_listen = NULL;
706  }
707  s->intersection_op = NULL;
708  if (NULL != s->intersection_set)
709  {
711  s->intersection_set = NULL;
712  }
715  return;
716 
717  default:
718  GNUNET_break (0);
719  return;
720  }
721 }
A scalarproduct session which tracks a request form the client to our final response.
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static void send_alices_cryptodata_message(struct AliceServiceSession *s)
Send the cryptographic data from Alice to Bob.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
Success, all elements have been sent (and received).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
const void * data
Actual data of the element.
struct GNUNET_SET_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
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.
void GNUNET_SET_destroy(struct GNUNET_SET_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: set_api.c:772
The other peer refused to to the operation with us, or something went wrong.
Success, all elements have been returned (but the other peer might still be receiving some from us...
Everything went ok, we are transmitting an element of the result (in set, or to be removed from set...
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.
void GNUNET_SET_listen_cancel(struct GNUNET_SET_ListenHandle *lh)
Cancel the given listen operation.
Definition: set_api.c:1051
int64_t value
Value to multiply in scalar product, in NBO.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_SET_Handle * intersection_set
Set of elements for which will conduction an intersection.
struct GNUNET_SET_ListenHandle * intersection_listen
Handle to Alice&#39;s Intersection operation listening for Bob.
#define LOG(kind,...)
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
static void prepare_client_end_notification(struct AliceServiceSession *session)
Notify the client that the session has failed.
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:48
#define GNUNET_free(ptr)
Wrapper around free.
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◆ cb_intersection_request_alice()

static void cb_intersection_request_alice ( void *  cls,
const struct GNUNET_PeerIdentity other_peer,
const struct GNUNET_MessageHeader context_msg,
struct GNUNET_SET_Request request 
)
static

Called when another peer wants to do a set operation with the local peer.

If a listen error occurs, the request is NULL.

Parameters
clsclosure with the struct AliceServiceSession *
other_peerthe other peer
context_msgmessage with application specific information from the other peer
requestrequest from the other peer (never NULL), use GNUNET_SET_accept() to accept it, otherwise the request will be refused Note that we can't just return value from the listen callback, as it is also necessary to specify the set we want to do the operation with, whith sometimes can be derived from the context message. It's necessary to specify the timeout.

Definition at line 740 of file gnunet-service-scalarproduct-ecc_alice.c.

References cb_intersection_element_removed(), GNUNET_break, GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_OK, GNUNET_SCALARPRODUCT_STATUS_FAILURE, GNUNET_SET_accept(), GNUNET_SET_commit(), GNUNET_SET_RESULT_REMOVED, AliceServiceSession::intersection_op, AliceServiceSession::intersection_set, AliceServiceSession::peer, prepare_client_end_notification(), AliceServiceSession::s, and AliceServiceSession::status.

Referenced by client_request_complete_alice().

744 {
745  struct AliceServiceSession *s = cls;
746 
748  "Received intersection request from %s!\n",
749  GNUNET_i2s (other_peer));
750  if (0 != GNUNET_memcmp (other_peer, &s->peer))
751  {
752  GNUNET_break_op (0);
753  return;
754  }
755  s->intersection_op = GNUNET_SET_accept (request,
757  (struct GNUNET_SET_Option[]){ { 0 } },
759  s);
760  if (NULL == s->intersection_op)
761  {
762  GNUNET_break (0);
765  return;
766  }
768  {
769  GNUNET_break (0);
772  return;
773  }
774 }
A scalarproduct session which tracks a request form the client to our final response.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_SET_OperationHandle * intersection_op
Set of elements for which will conduction an intersection.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_PeerIdentity peer
Alice or Bob&#39;s peerID.
static void cb_intersection_element_removed(void *cls, const struct GNUNET_SET_Element *element, uint64_t current_size, enum GNUNET_SET_Status status)
Callback for set operation results.
Option for set operations.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
int GNUNET_SET_commit(struct GNUNET_SET_OperationHandle *oh, struct GNUNET_SET_Handle *set)
Commit a set to be used with a set operation.
Definition: set_api.c:1128
#define GNUNET_log(kind,...)
Client gets only elements that have been removed from the set.
struct GNUNET_SET_Handle * intersection_set
Set of elements for which will conduction an intersection.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
static void prepare_client_end_notification(struct AliceServiceSession *session)
Notify the client that the session has failed.
struct GNUNET_SET_OperationHandle * GNUNET_SET_accept(struct GNUNET_SET_Request *request, enum GNUNET_SET_ResultMode result_mode, struct GNUNET_SET_Option options[], GNUNET_SET_ResultIterator result_cb, void *result_cls)
Accept a request we got via GNUNET_SET_listen().
Definition: set_api.c:1085
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◆ client_request_complete_alice()

static void client_request_complete_alice ( struct AliceServiceSession s)
static

Our client has finished sending us its multipart message.

Parameters
sessionthe service session context

Definition at line 783 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::cadet_mq, cb_channel_destruction(), cb_intersection_request_alice(), AliceServiceSession::channel, e, GNUNET_CADET_channel_create(), GNUNET_CADET_channel_destroy(), GNUNET_CADET_get_mq(), GNUNET_CRYPTO_hash(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_BOB_CRYPTODATA, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_SESSION_INITIALIZATION, GNUNET_MQ_env_set_options(), GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_msg, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_MQ_send(), GNUNET_SCALARPRODUCT_STATUS_FAILURE, GNUNET_SET_listen(), GNUNET_SET_OPERATION_INTERSECTION, AliceServiceSession::intersection_listen, msg, AliceServiceSession::peer, prepare_client_end_notification(), EccServiceRequestMessage::session_id, AliceServiceSession::session_id, and AliceServiceSession::status.

Referenced by handle_alice_client_message(), and handle_alice_client_message_multipart().

784 {
785  struct GNUNET_MQ_MessageHandler cadet_handlers[] =
786  { GNUNET_MQ_hd_fixed_size (bobs_cryptodata_message,
789  s),
792  struct GNUNET_MQ_Envelope *e;
793  struct GNUNET_HashCode set_sid;
794 
796  sizeof(struct GNUNET_HashCode),
797  &set_sid);
799  "Creating new channel for session with key %s.\n",
800  GNUNET_h2s (&s->session_id));
802  s,
803  &s->peer,
804  &s->session_id,
805  NULL,
807  cadet_handlers);
808  if (NULL == s->channel)
809  {
812  return;
813  }
817  &set_sid,
819  s);
820  if (NULL == s->intersection_listen)
821  {
824  s->channel = NULL;
826  return;
827  }
828 
829  e =
830  GNUNET_MQ_msg (msg,
833  msg->session_id = s->session_id;
834  GNUNET_MQ_send (s->cadet_mq, e);
835 }
struct GNUNET_HashCode session_id
The transaction/session key used to identify a session.
struct GNUNET_SET_ListenHandle * GNUNET_SET_listen(const struct GNUNET_CONFIGURATION_Handle *cfg, enum GNUNET_SET_OperationType op_type, const struct GNUNET_HashCode *app_id, GNUNET_SET_ListenCallback listen_cb, void *listen_cls)
Wait for set operation requests for the given application ID.
Definition: set_api.c:1017
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
struct GNUNET_CADET_Channel * channel
channel-handle associated with our cadet handle
struct GNUNET_MQ_Handle * cadet_mq
The message queue for CADET.
static const struct GNUNET_CONFIGURATION_Handle * cfg
GNUnet configuration handle.
void GNUNET_MQ_env_set_options(struct GNUNET_MQ_Envelope *env, enum GNUNET_MQ_PriorityPreferences pp)
Set application-specific options for this envelope.
Definition: mq.c:1005
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
#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).
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:48
static void cb_intersection_request_alice(void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SET_Request *request)
Called when another peer wants to do a set operation with the local peer.
A 512-bit hashcode.
Message handler for a specific message type.
static void cb_channel_destruction(void *cls, const struct GNUNET_CADET_Channel *channel)
Function called whenever a channel is destroyed.
struct GNUNET_PeerIdentity peer
Alice or Bob&#39;s peerID.
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
Message type passed from responding service Bob to responding service Alice to complete a request and...
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.
struct GNUNET_CADET_Channel * GNUNET_CADET_channel_create(struct GNUNET_CADET_Handle *h, void *channel_cls, const struct GNUNET_PeerIdentity *destination, const struct GNUNET_HashCode *port, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Create a new channel towards a remote peer.
Definition: cadet_api.c:1068
#define GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ECC_BOB_CRYPTODATA
Bob -> Alice ECC crypto data.
#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:353
Set intersection, only return elements that are in both sets.
struct GNUNET_SET_ListenHandle * intersection_listen
Handle to Alice&#39;s Intersection operation listening for Bob.
Highest priority, control traffic (i.e.
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:903
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
static void prepare_client_end_notification(struct AliceServiceSession *session)
Notify the client that the session has failed.
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:1119
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◆ check_alice_client_message_multipart()

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

We're receiving additional set data.

Check if msg is well-formed.

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

Definition at line 847 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::client_received_element_count, ComputationBobCryptodataMultipartMessage::element_count_contained, GNUNET_break_op, GNUNET_OK, GNUNET_SYSERR, ComputationBobCryptodataMultipartMessage::header, AliceServiceSession::s, GNUNET_MessageHeader::size, and AliceServiceSession::total.

850 {
851  struct AliceServiceSession *s = cls;
852  uint32_t contained_count;
853  uint16_t msize;
854 
855  msize = ntohs (msg->header.size);
856  contained_count = ntohl (msg->element_count_contained);
857  if ((msize !=
859  + contained_count * sizeof(struct GNUNET_SCALARPRODUCT_Element))) ||
860  (0 == contained_count) ||
862  (s->total < s->client_received_element_count + contained_count))
863  {
864  GNUNET_break_op (0);
865  return GNUNET_SYSERR;
866  }
867  return GNUNET_OK;
868 }
A scalarproduct session which tracks a request form the client to our final response.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
uint32_t total
How many elements we were supplied with from the client (total count before intersection).
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
struct GNUNET_MessageHeader header
GNUNET message header.
uint32_t element_count_contained
contained elements the vector in payload contains
multipart messages following struct ComputationMessage
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t client_received_element_count
Already transferred elements from client to us.
An element key-value pair for scalarproduct.

◆ handle_alice_client_message_multipart()

static void handle_alice_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
clsclient identification of the client
msgthe actual message

Definition at line 879 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::client, AliceServiceSession::client_received_element_count, client_request_complete_alice(), GNUNET_SET_Element::data, ComputationBobCryptodataMultipartMessage::element_count_contained, GNUNET_SET_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_SET_add_element(), GNUNET_SYSERR, AliceServiceSession::intersected_elements, AliceServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, AliceServiceSession::s, GNUNET_SET_Element::size, AliceServiceSession::total, and AliceServiceSession::used_element_count.

882 {
883  struct AliceServiceSession *s = cls;
884  uint32_t contained_count;
885  const struct GNUNET_SCALARPRODUCT_Element *elements;
886  struct GNUNET_SET_Element set_elem;
887  struct GNUNET_SCALARPRODUCT_Element *elem;
888 
889  contained_count = ntohl (msg->element_count_contained);
890  s->client_received_element_count += contained_count;
891  elements = (const struct GNUNET_SCALARPRODUCT_Element *) &msg[1];
892  for (uint32_t i = 0; i < contained_count; i++)
893  {
895  GNUNET_memcpy (elem,
896  &elements[i],
897  sizeof(struct GNUNET_SCALARPRODUCT_Element));
900  &elem->key,
901  elem,
903  {
904  GNUNET_break (0);
905  GNUNET_free (elem);
906  continue;
907  }
908  set_elem.data = &elem->key;
909  set_elem.size = sizeof(elem->key);
910  set_elem.element_type = 0;
911  GNUNET_SET_add_element (s->intersection_set, &set_elem, NULL, NULL);
912  s->used_element_count++;
913  }
916  {
917  /* more to come */
919  "Received client multipart data, waiting for more!\n");
920  return;
921  }
922  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Launching computation\n");
924 }
A scalarproduct session which tracks a request form the client to our final response.
int GNUNET_SET_add_element(struct GNUNET_SET_Handle *set, const struct GNUNET_SET_Element *element, GNUNET_SET_Continuation cont, void *cont_cls)
Add an element to the given set.
Definition: set_api.c:687
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
Element stored in a set.
#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.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
uint32_t total
How many elements we were supplied with from the client (total count before intersection).
There must only be one value per key; storing a value should fail if a value under the same key alrea...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
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 used_element_count
How many elements actually are used for the scalar product.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
#define GNUNET_log(kind,...)
uint32_t element_count_contained
contained elements the vector in payload contains
struct GNUNET_SET_Handle * intersection_set
Set of elements for which will conduction an intersection.
struct GNUNET_SERVICE_Client * client
The client this request is related to.
static void client_request_complete_alice(struct AliceServiceSession *s)
Our client has finished sending us its multipart message.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t client_received_element_count
Already transferred elements from client to us.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2243
An element key-value pair for scalarproduct.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ check_alice_client_message()

static int check_alice_client_message ( void *  cls,
const struct AliceComputationMessage msg 
)
static

Handler for Alice's client request message.

Check that msg is well-formed.

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

Definition at line 936 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceComputationMessage::element_count_contained, AliceComputationMessage::element_count_total, GNUNET_break, GNUNET_break_op, GNUNET_OK, GNUNET_SYSERR, AliceComputationMessage::header, AliceServiceSession::intersected_elements, AliceServiceSession::s, and GNUNET_MessageHeader::size.

938 {
939  struct AliceServiceSession *s = cls;
940  uint16_t msize;
941  uint32_t total_count;
942  uint32_t contained_count;
943 
944  if (NULL != s->intersected_elements)
945  {
946  /* only one concurrent session per client connection allowed,
947  simplifies logic a lot... */
948  GNUNET_break (0);
949  return GNUNET_SYSERR;
950  }
951  msize = ntohs (msg->header.size);
952  total_count = ntohl (msg->element_count_total);
953  contained_count = ntohl (msg->element_count_contained);
954  if ((0 == total_count) || (0 == contained_count) ||
955  (msize !=
956  (sizeof(struct AliceComputationMessage)
957  + contained_count * sizeof(struct GNUNET_SCALARPRODUCT_Element))))
958  {
959  GNUNET_break_op (0);
960  return GNUNET_SYSERR;
961  }
962  return GNUNET_OK;
963 }
A scalarproduct session which tracks a request form the client to our final response.
struct GNUNET_MessageHeader header
GNUNET message header with type GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_ALICE.
Definition: scalarproduct.h:51
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Message type passed from client to service to initiate a request or responder role.
Definition: scalarproduct.h:45
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
uint32_t element_count_total
how many elements the vector in payload contains
Definition: scalarproduct.h:56
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
uint32_t element_count_contained
contained elements the vector in payload contains
Definition: scalarproduct.h:61
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
An element key-value pair for scalarproduct.

◆ handle_alice_client_message()

static void handle_alice_client_message ( void *  cls,
const struct AliceComputationMessage msg 
)
static

Handler for Alice's client request message.

We are doing request-initiation to compute a scalar product with a peer.

Parameters
clsidentification of the client
msgthe actual message

Definition at line 974 of file gnunet-service-scalarproduct-ecc_alice.c.

References AliceServiceSession::client, AliceServiceSession::client_received_element_count, client_request_complete_alice(), GNUNET_SET_Element::data, AliceComputationMessage::element_count_contained, AliceComputationMessage::element_count_total, GNUNET_SET_Element::element_type, GNUNET_break, GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_memcpy, GNUNET_new, GNUNET_ntohll(), GNUNET_SCALARPRODUCT_STATUS_ACTIVE, GNUNET_SERVICE_client_continue(), GNUNET_SET_add_element(), GNUNET_SET_create(), GNUNET_SET_OPERATION_INTERSECTION, GNUNET_SYSERR, GNUNET_YES, AliceServiceSession::intersected_elements, AliceServiceSession::intersection_set, GNUNET_SCALARPRODUCT_Element::key, AliceComputationMessage::peer, AliceServiceSession::peer, AliceServiceSession::s, AliceServiceSession::session_id, AliceComputationMessage::session_key, GNUNET_SET_Element::size, AliceServiceSession::status, AliceServiceSession::total, AliceServiceSession::used_element_count, and MpiElement::value.

976 {
977  struct AliceServiceSession *s = cls;
978  uint32_t contained_count;
979  uint32_t total_count;
980  const struct GNUNET_SCALARPRODUCT_Element *elements;
981  struct GNUNET_SET_Element set_elem;
982  struct GNUNET_SCALARPRODUCT_Element *elem;
983 
984  total_count = ntohl (msg->element_count_total);
985  contained_count = ntohl (msg->element_count_contained);
986  s->peer = msg->peer;
988  s->total = total_count;
989  s->client_received_element_count = contained_count;
990  s->session_id = msg->session_key;
991  elements = (const struct GNUNET_SCALARPRODUCT_Element *) &msg[1];
994  s->intersection_set =
996  for (uint32_t i = 0; i < contained_count; i++)
997  {
998  if (0 == GNUNET_ntohll (elements[i].value))
999  continue;
1000  elem = GNUNET_new (struct GNUNET_SCALARPRODUCT_Element);
1001  GNUNET_memcpy (elem,
1002  &elements[i],
1003  sizeof(struct GNUNET_SCALARPRODUCT_Element));
1006  &elem->key,
1007  elem,
1009  {
1010  /* element with same key encountered twice! */
1011  GNUNET_break (0);
1012  GNUNET_free (elem);
1013  continue;
1014  }
1015  set_elem.data = &elem->key;
1016  set_elem.size = sizeof(elem->key);
1017  set_elem.element_type = 0;
1018  GNUNET_SET_add_element (s->intersection_set, &set_elem, NULL, NULL);
1019  s->used_element_count++;
1020  }
1022  if (s->total != s->client_received_element_count)
1023  {
1024  /* wait for multipart msg */
1026  "Received partial client request, waiting for more!\n");
1027  return;
1028  }
1029  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Launching computation\n");
1031 }
A scalarproduct session which tracks a request form the client to our final response.
int GNUNET_SET_add_element(struct GNUNET_SET_Handle *set, const struct GNUNET_SET_Element *element, GNUNET_SET_Continuation cont, void *cont_cls)
Add an element to the given set.
Definition: set_api.c:687
static const struct GNUNET_CONFIGURATION_Handle * cfg
GNUnet configuration handle.
Operation is still active (never returned, used internally).
struct GNUNET_HashCode key
Key used to identify matching pairs of values to multiply.
Element stored in a set.
struct GNUNET_SET_Handle * GNUNET_SET_create(const struct GNUNET_CONFIGURATION_Handle *cfg, enum GNUNET_SET_OperationType op)
Create an empty set, supporting the specified operation.
Definition: set_api.c:657
#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.
enum GNUNET_SCALARPRODUCT_ResponseStatus status
State of this session.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
uint32_t total
How many elements we were supplied with from the client (total count before intersection).
struct GNUNET_HashCode session_key
the transaction/session key used to identify a session
Definition: scalarproduct.h:71
static char * value
Value of the record to add/remove.
struct GNUNET_PeerIdentity peer
the identity of a remote peer we want to communicate with
Definition: scalarproduct.h:76
uint32_t element_count_total
how many elements the vector in payload contains
Definition: scalarproduct.h:56
struct GNUNET_PeerIdentity peer
Alice or Bob&#39;s peerID.
struct GNUNET_HashCode session_id
(hopefully) unique transaction ID
There must only be one value per key; storing a value should fail if a value under the same key alrea...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
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 used_element_count
How many elements actually are used for the scalar product.
struct GNUNET_CONTAINER_MultiHashMap * intersected_elements
all non-0-value&#39;d elements transmitted to us.
#define GNUNET_log(kind,...)
uint32_t element_count_contained
contained elements the vector in payload contains
Definition: scalarproduct.h:61
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_SET_Handle * intersection_set
Set of elements for which will conduction an intersection.
struct GNUNET_SERVICE_Client * client
The client this request is related to.
static void client_request_complete_alice(struct AliceServiceSession *s)
Our client has finished sending us its multipart message.
Set intersection, only return elements that are in both sets.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
uint32_t client_received_element_count
Already transferred elements from client to us.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2243
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:48
#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
tcunused

Definition at line 1041 of file gnunet-service-scalarproduct-ecc_alice.c.

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

Referenced by run().

1042 {
1043  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Shutting down, initiating cleanup.\n");
1044  // FIXME: we have to cut our connections to CADET first!
1045  if (NULL != my_cadet)
1046  {
1048  my_cadet = NULL;
1049  }
1050  if (NULL != edc)
1051  {
1053  edc = NULL;
1054  }
1055 }
void GNUNET_CADET_disconnect(struct GNUNET_CADET_Handle *handle)
Disconnect from the cadet service.
Definition: cadet_api.c:841
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
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 AliceServiceSession

Definition at line 1069 of file gnunet-service-scalarproduct-ecc_alice.c.

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

Referenced by run().

1072 {
1073  struct AliceServiceSession *s;
1074 
1075  s = GNUNET_new (struct AliceServiceSession);
1076  s->client = client;
1077  s->client_mq = mq;
1078  return s;
1079 }
A scalarproduct session which tracks a request form the client to our final response.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_MQ_Handle * client_mq
The message queue for the client.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
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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 AliceServiceSession

Definition at line 1093 of file gnunet-service-scalarproduct-ecc_alice.c.

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

Referenced by run().

1096 {
1097  struct AliceServiceSession *s = app_cls;
1098 
1100  "Client %p disconnected from us.\n",
1101  client);
1102  s->client = NULL;
1103  s->client_mq = NULL;
1105 }
A scalarproduct session which tracks a request form the client to our final response.
#define GNUNET_log(kind,...)
struct GNUNET_SERVICE_Client * client
The client this request is related to.
struct GNUNET_MQ_Handle * client_mq
The message queue for the client.
struct GNUNET_CRYPTO_PaillierCiphertext s
Bob&#39;s "s".
static void destroy_service_session(struct AliceServiceSession *s)
Destroy session state, we are done with it.
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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 1116 of file gnunet-service-scalarproduct-ecc_alice.c.

References _, client_connect_cb(), client_disconnect_cb(), GNUNET_CADET_connect(), GNUNET_CRYPTO_ecc_dlog_prepare(), GNUNET_CRYPTO_ecc_rnd_mpi(), GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_ALICE, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_ALICE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_NONE, MAX_RAM, MAX_RESULT, my_privkey, my_privkey_inv, and shutdown_task().

1119 {
1120  cfg = c;
1122  /* Select a random 'a' value for Alice */
1125  if (NULL == my_cadet)
1126  {
1127  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _ ("Connect to CADET failed\n"));
1129  return;
1130  }
1132 }
void GNUNET_CRYPTO_ecc_rnd_mpi(struct GNUNET_CRYPTO_EccDlogContext *edc, gcry_mpi_t *r, gcry_mpi_t *r_inv)
Obtain a random scalar for point multiplication on the curve and its multiplicative inverse...
static const struct GNUNET_CONFIGURATION_Handle * cfg
GNUnet configuration handle.
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:1300
static struct GNUNET_CADET_Handle * my_cadet
Handle to the CADET service.
static void shutdown_task(void *cls)
Task run during shutdown.
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:526
struct GNUNET_CADET_Handle * GNUNET_CADET_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the MQ-based cadet service.
Definition: cadet_api.c:976
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
static struct GNUNET_CRYPTO_EccDlogContext * edc
Context for DLOG operations on a curve.
#define MAX_RESULT
Maximum allowed result value for the scalarproduct computation.
static gcry_mpi_t my_privkey
Alice&#39;s private key (&#39;a&#39;).
#define GNUNET_log(kind,...)
static gcry_mpi_t my_privkey_inv
Inverse of Alice&#39;s private key (&#39;a_inv&#39;).
#define MAX_RAM
How many values should DLOG store in memory (determines baseline RAM consumption, roughly 100 bytes t...
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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "scalarproduct-alice"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_var_size(alice_client_message, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_TO_ALICE, struct AliceComputationMessage, NULL)  ,
GNUNET_MQ_hd_var_size(alice_client_message_multipart, GNUNET_MESSAGE_TYPE_SCALARPRODUCT_CLIENT_MULTIPART_ALICE, 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 183 of file gnunet-service-scalarproduct-ecc_alice.c.

◆ edc

struct GNUNET_CRYPTO_EccDlogContext* edc
static

Context for DLOG operations on a curve.

Definition at line 188 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by GNUNET_CRYPTO_ecc_dlog_prepare().

◆ my_privkey

gcry_mpi_t my_privkey
static

Alice's private key ('a').

Definition at line 193 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by run(), and send_alices_cryptodata_message().

◆ my_privkey_inv

gcry_mpi_t my_privkey_inv
static

Inverse of Alice's private key ('a_inv').

Definition at line 198 of file gnunet-service-scalarproduct-ecc_alice.c.

Referenced by compute_scalar_product(), and run().

◆ my_cadet

struct GNUNET_CADET_Handle* my_cadet
static

Handle to the CADET service.

Definition at line 203 of file gnunet-service-scalarproduct-ecc_alice.c.