WAITING_FOR_SERVICE_REQUEST,
WAITING_FOR_SERVICE_RESPONSE,
SERVICE_REQUEST_RECEIVED,
+ SERVICE_RESPONSE_RECEIVED,
FINALIZED
};
/**
* how many elements we were supplied with from the client
*/
- uint16_t element_count;
+ uint32_t element_count;
/**
* how many elements actually are used after applying the mask
*/
- uint16_t used_element_count;
+ uint32_t used_element_count;
/**
* how many bytes the mask is long.
* just for convenience so we don't have to re-re-re calculate it each time
*/
- uint16_t mask_length;
+ uint32_t mask_length;
/**
* all the vector elements we received
/**
* Service's own public key represented as string
*/
-static uint16_t my_pubkey_external_length = 0;
+static uint32_t my_pubkey_external_length = 0;
/**
* Service's own n
* @return an MPI value containing the calculated sum, never NULL
*/
static gcry_mpi_t
-compute_square_sum (gcry_mpi_t * vector, uint16_t length)
+compute_square_sum (gcry_mpi_t * vector, uint32_t length)
{
gcry_mpi_t elem;
gcry_mpi_t sum;
written = size;
}
- if (GNUNET_MESSAGE_TYPE_SCALARPRODUCT_SERVICE_TO_CLIENT == ntohs(session->msg->type)){
- session->state = FINALIZED;
- session->client_transmit_handle = NULL;
+ switch (ntohs(session->msg->type)){
+ case GNUNET_MESSAGE_TYPE_SCALARPRODUCT_SERVICE_TO_CLIENT:
+ session->state = FINALIZED;
+ session->client_transmit_handle = NULL;
+ break;
+ default:
+ session->service_transmit_handle = NULL;
}
- else
- session->service_transmit_handle = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sent a message of type %hu.\n",
* @return the initialized vector, never NULL
*/
static gcry_mpi_t *
-initialize_mpi_vector (uint16_t length)
+initialize_mpi_vector (uint32_t length)
{
uint32_t i;
gcry_mpi_t * output = GNUNET_malloc (sizeof (gcry_mpi_t) * length);
* @return an array of MPI values with random values
*/
static gcry_mpi_t *
-generate_random_vector (uint16_t length)
+generate_random_vector (uint32_t length)
{
gcry_mpi_t * random_vector;
int32_t value;
static struct ServiceSession *
find_matching_session (struct ServiceSession * tail,
const struct GNUNET_HashCode * key,
- uint16_t element_count,
+ uint32_t element_count,
enum SessionState * state,
const struct GNUNET_PeerIdentity * peerid)
{
struct GNUNET_SERVER_Client *client)
{
struct ServiceSession *session;
-
+
session = GNUNET_SERVER_client_get_user_context (client, struct ServiceSession);
if (NULL == session)
return;
// 0 size and the first char in the product is 0, which should never be zero if encoding is used.
msg->product_length = htonl (0);
msg->range = 1;
- session->state = FINALIZED;
-
+
session->msg = &msg->header;
//transmit this message to our client
session);
// if we could not even queue our request, something is wrong
- if ( ! session->client_transmit_handle)
+ if ( NULL == session->client_transmit_handle)
{
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _ ("Could not send message to client (%p)! This is OK if it was disconnected beforehand already.\n"), session->client);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _ ("Could not send message to client (%p)!\n"), session->client);
// usually gets freed by do_send_message
- GNUNET_free (msg_obj);
+ session->msg = NULL;
GNUNET_free (msg);
}
else
struct ServiceSession * response)
{
struct GNUNET_SCALARPRODUCT_service_response * msg;
- uint16_t msg_length = 0;
+ uint32_t msg_length = 0;
unsigned char * current = NULL;
unsigned char * element_exported = NULL;
size_t element_length = 0;
msg->header.type = htons (GNUNET_MESSAGE_TYPE_SCALARPRODUCT_BOB_TO_ALICE);
msg->header.size = htons (msg_length);
- msg->element_count = htons (request->element_count);
- msg->used_element_count = htons (request->used_element_count);
+ msg->element_count = htonl (request->element_count);
+ msg->used_element_count = htonl (request->used_element_count);
memcpy (&msg->key, &request->key, sizeof (struct GNUNET_HashCode));
current = (unsigned char *) &msg[1];
int ret = GNUNET_SYSERR;
unsigned int * p;
unsigned int * q;
- uint16_t count;
+ uint32_t count;
gcry_mpi_t * rand = NULL;
gcry_mpi_t * r = NULL;
gcry_mpi_t * r_prime = NULL;
struct GNUNET_SCALARPRODUCT_service_request * msg;
unsigned int i;
unsigned int j;
- uint16_t msg_length;
+ uint32_t msg_length;
size_t element_length = 0; // initialized by gcry_mpi_print, but the compiler doesn't know that
gcry_mpi_t a;
uint32_t value;
msg = GNUNET_malloc (msg_length);
msg->header.type = htons (GNUNET_MESSAGE_TYPE_SCALARPRODUCT_ALICE_TO_BOB);
memcpy (&msg->key, &session->key, sizeof (struct GNUNET_HashCode));
- msg->mask_length = htons (session->mask_length);
- msg->pk_length = htons (my_pubkey_external_length);
- msg->used_element_count = htons (session->used_element_count);
- msg->element_count = htons (session->element_count);
+ msg->mask_length = htonl (session->mask_length);
+ msg->pk_length = htonl (my_pubkey_external_length);
+ msg->used_element_count = htonl (session->used_element_count);
+ msg->element_count = htonl (session->element_count);
msg->header.size = htons (msg_length);
// fill in the payload
{
const struct GNUNET_SCALARPRODUCT_client_request * msg = (const struct GNUNET_SCALARPRODUCT_client_request *) message;
struct ServiceSession * session;
- uint16_t element_count;
- uint16_t mask_length;
- uint16_t msg_type;
+ uint32_t element_count;
+ uint32_t mask_length;
+ uint32_t msg_type;
int32_t * vector;
uint32_t i;
// only one concurrent session per client connection allowed, simplifies logics a lot...
- GNUNET_SERVER_client_get_user_context (client, session);
+ session = GNUNET_SERVER_client_get_user_context (client, struct ServiceSession);
if ((NULL != session) && (session->state != FINALIZED)){
GNUNET_SERVER_receive_done (client, GNUNET_OK);
return;
}
msg_type = ntohs (msg->header.type);
- element_count = ntohs (msg->element_count);
- mask_length = ntohs (msg->mask_length);
+ element_count = ntohl (msg->element_count);
+ mask_length = ntohl (msg->mask_length);
//sanity check: is the message as long as the message_count fields suggests?
if (( ntohs (msg->header.size) != (sizeof (struct GNUNET_SCALARPRODUCT_client_request) + element_count * sizeof (int32_t) + mask_length))
session->used_element_count++;
}
- if ( ! session->used_element_count)
+ if ( 0 == session->used_element_count)
{
GNUNET_break_op (0);
GNUNET_free (session->vector);
- GNUNET_free (session->a);
GNUNET_free (session);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
{
GNUNET_break (0);
GNUNET_free (session->vector);
- GNUNET_free (session->a);
GNUNET_free (session);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
{
GNUNET_break (0);
GNUNET_free (session->vector);
- GNUNET_free (session->a);
GNUNET_free (session);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
if (ALICE == session->role) {
// as we have only one peer connected in each session, just remove the session
- if ((FINALIZED != session->state) && (!do_shutdown))
+ if ((SERVICE_RESPONSE_RECEIVED > session->state) && (!do_shutdown))
{
session->tunnel = NULL;
// if this happened before we received the answer, we must terminate the session
compute_scalar_product (struct ServiceSession * session,
gcry_mpi_t * r, gcry_mpi_t * r_prime, gcry_mpi_t s, gcry_mpi_t s_prime)
{
- uint16_t count;
+ uint32_t count;
gcry_mpi_t t;
gcry_mpi_t u;
gcry_mpi_t utick;
struct GNUNET_SCALARPRODUCT_client_response * msg;
unsigned char * product_exported = NULL;
size_t product_length = 0;
- uint16_t msg_length = 0;
- struct MessageObject * msg_obj;
+ uint32_t msg_length = 0;
int8_t range = -1;
gcry_error_t rc;
int sign;
sign = gcry_mpi_cmp_ui(session->product, 0);
// libgcrypt can not handle a print of a negative number
+ // if (a->sign) return gcry_error (GPG_ERR_INTERNAL); /* Can't handle it yet. */
if (0 > sign){
gcry_mpi_sub(value, value, session->product);
}
else
range = 0;
+ gcry_mpi_release (session->product);
+ session->product = NULL;
+
// get representation as string
- // unfortunately libgcrypt is too stupid to implement print-support in
- // signed GCRYMPI_FMT_STD format, and simply asserts in that case.
- // here is the associated sourcecode:
- // if (a->sign) return gcry_error (GPG_ERR_INTERNAL); /* Can't handle it yet. */
if (range
&& (0 != (rc = gcry_mpi_aprint (GCRYMPI_FMT_USG,
&product_exported,
&product_length,
- session->product)))){
+ value)))){
LOG_GCRY(GNUNET_ERROR_TYPE_ERROR, "gcry_mpi_scan", rc);
product_length = 0;
range = -1; // signal error with product-length = 0 and range = -1
}
-
- gcry_mpi_release (session->product);
- session->product = NULL;
+ gcry_mpi_release (value);
}
msg_length = sizeof (struct GNUNET_SCALARPRODUCT_client_response) + product_length;
msg = GNUNET_malloc (msg_length);
- memcpy (&msg[1], product_exported, product_length);
- GNUNET_free_non_null (product_exported);
+ memcpy (&msg->key, &session->key, sizeof (struct GNUNET_HashCode));
+ memcpy (&msg->peer, &session->peer, sizeof ( struct GNUNET_PeerIdentity));
+ if (product_exported != NULL){
+ memcpy (&msg[1], product_exported, product_length);
+ GNUNET_free(product_exported);
+ }
msg->header.type = htons (GNUNET_MESSAGE_TYPE_SCALARPRODUCT_SERVICE_TO_CLIENT);
msg->header.size = htons (msg_length);
msg->range = range;
- memcpy (&msg->key, &session->key, sizeof (struct GNUNET_HashCode));
- memcpy (&msg->peer, &session->peer, sizeof ( struct GNUNET_PeerIdentity));
msg->product_length = htonl (product_length);
- msg_obj = GNUNET_new (struct MessageObject);
- msg_obj->msg = (struct GNUNET_MessageHeader *) msg;
- msg_obj->transmit_handle = NULL; // don't reset the transmit handle
-
+ session->msg = (struct GNUNET_MessageHeader *) msg;
//transmit this message to our client
session->client_transmit_handle =
GNUNET_SERVER_notify_transmit_ready (session->client,
msg_length,
GNUNET_TIME_UNIT_FOREVER_REL,
&do_send_message,
- msg_obj);
- if ( ! session->client_transmit_handle)
+ session);
+ if ( NULL == session->client_transmit_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _ ("Could not send message to client (%p)! This probably is OK if the client disconnected before us.\n"),
+ _ ("Could not send message to client (%p)!\n"),
session->client);
session->client = NULL;
// callback was not called!
- GNUNET_free (msg_obj);
GNUNET_free (msg);
+ session->msg = NULL;
}
else
// gracefully sent message, just terminate session structure
{
struct ServiceSession * session;
const struct GNUNET_SCALARPRODUCT_service_request * msg = (const struct GNUNET_SCALARPRODUCT_service_request *) message;
- uint16_t mask_length;
- uint16_t pk_length;
- uint16_t used_elements;
- uint16_t element_count;
- uint16_t msg_length;
+ uint32_t mask_length;
+ uint32_t pk_length;
+ uint32_t used_elements;
+ uint32_t element_count;
+ uint32_t msg_length;
unsigned char * current;
struct ServiceSession * responder_session;
int32_t i = -1;
GNUNET_break_op(0);
return GNUNET_SYSERR;
}
- mask_length = ntohs (msg->mask_length);
- pk_length = ntohs (msg->pk_length);
- used_elements = ntohs (msg->used_element_count);
- element_count = ntohs (msg->element_count);
+ mask_length = ntohl (msg->mask_length);
+ pk_length = ntohl (msg->pk_length);
+ used_elements = ntohl (msg->used_element_count);
+ element_count = ntohl (msg->element_count);
msg_length = sizeof (struct GNUNET_SCALARPRODUCT_service_request)
+ mask_length + pk_length + used_elements * PAILLIER_ELEMENT_LENGTH;
memcpy (&session->peer, &session->peer, sizeof (struct GNUNET_PeerIdentity));
session->state = SERVICE_REQUEST_RECEIVED;
- session->element_count = ntohs (msg->element_count);
+ session->element_count = ntohl (msg->element_count);
session->used_element_count = used_elements;
session->tunnel = tunnel;
struct ServiceSession * session;
const struct GNUNET_SCALARPRODUCT_service_response * msg = (const struct GNUNET_SCALARPRODUCT_service_response *) message;
unsigned char * current;
- uint16_t count;
+ uint32_t count;
gcry_mpi_t s = NULL;
gcry_mpi_t s_prime = NULL;
size_t read;
size_t i;
- uint16_t used_element_count;
+ uint32_t used_element_count;
size_t msg_size;
gcry_mpi_t * r = NULL;
gcry_mpi_t * r_prime = NULL;
count = session->used_element_count;
session->product = NULL;
+ session->state = SERVICE_RESPONSE_RECEIVED;
//we need at least a peer and one message id to compare
if (sizeof (struct GNUNET_SCALARPRODUCT_service_response) > ntohs (msg->header.size))
GNUNET_break_op (0);
goto invalid_msg;
}
- used_element_count = ntohs (msg->used_element_count);
+ used_element_count = ntohl (msg->used_element_count);
msg_size = sizeof (struct GNUNET_SCALARPRODUCT_service_response)
+ 2 * used_element_count * PAILLIER_ELEMENT_LENGTH
+ 2 * PAILLIER_ELEMENT_LENGTH;
PAILLIER_ELEMENT_LENGTH, &read)))
{
LOG_GCRY (GNUNET_ERROR_TYPE_DEBUG, "gcry_mpi_scan", rc);
- GNUNET_break_op (0);
+ GNUNET_break_op (0);
goto invalid_msg;
}
current += PAILLIER_ELEMENT_LENGTH;
PAILLIER_ELEMENT_LENGTH, &read)))
{
LOG_GCRY (GNUNET_ERROR_TYPE_DEBUG, "gcry_mpi_scan", rc);
- GNUNET_break_op (0);
+ GNUNET_break_op (0);
goto invalid_msg;
}
current += PAILLIER_ELEMENT_LENGTH;
}
-
session->product = compute_scalar_product (session, r, r_prime, s, s_prime);
invalid_msg:
GNUNET_free_non_null (r);
GNUNET_free_non_null (r_prime);
- session->state = FINALIZED;
- // the tunnel has done its job, terminate our connection and the tunnel
- // the peer will be notified that the tunnel was destroyed via tunnel_destruction_handler
- GNUNET_CONTAINER_DLL_remove (from_client_head, from_client_tail, session);
+ session->tunnel = NULL;
// send message with product to client
-
session->client_notification_task =
- GNUNET_SCHEDULER_add_now (&prepare_client_response,
- session);
- // just close the connection.
+ GNUNET_SCHEDULER_add_now (&prepare_client_response,
+ session);
+ // the tunnel has done its job, terminate our connection and the tunnel
+ // the peer will be notified that the tunnel was destroyed via tunnel_destruction_handler
+ // just close the connection, as recommended by Christian
return GNUNET_SYSERR;
}