GNUnet  0.10.x
gnunet-service-revocation.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2013, 2014, 2016 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
20 
38 #include "platform.h"
39 #include <math.h>
40 #include "gnunet_util_lib.h"
41 #include "gnunet_block_lib.h"
42 #include "gnunet_constants.h"
43 #include "gnunet_protocols.h"
44 #include "gnunet_signatures.h"
46 #include "gnunet_core_service.h"
48 #include "gnunet_set_service.h"
49 #include "revocation.h"
50 #include <gcrypt.h>
51 
52 
56 struct PeerEntry
57 {
58 
63 
68 
73 
78 
79 };
80 
81 
86 
92 
96 static const struct GNUNET_CONFIGURATION_Handle *cfg;
97 
102 
107 
112 
117 
122 
127 
131 static unsigned long long revocation_work_required;
132 
138 
139 
146 static struct PeerEntry *
148 {
149  struct PeerEntry *peer_entry;
150 
151  peer_entry = GNUNET_new (struct PeerEntry);
152  peer_entry->id = *peer;
155  &peer_entry->id,
156  peer_entry,
158  return peer_entry;
159 }
160 
161 
169 static int
171 {
172  if (GNUNET_YES !=
174  rm->proof_of_work,
175  (unsigned int) revocation_work_required))
176  {
178  "Proof of work invalid!\n");
179  GNUNET_break_op (0);
180  return GNUNET_NO;
181  }
182  if (GNUNET_OK !=
184  &rm->purpose,
185  &rm->signature,
186  &rm->public_key))
187  {
188  GNUNET_break_op (0);
189  return GNUNET_NO;
190  }
191  return GNUNET_YES;
192 }
193 
194 
203 static void *
204 client_connect_cb (void *cls,
205  struct GNUNET_SERVICE_Client *client,
206  struct GNUNET_MQ_Handle *mq)
207 {
208  return client;
209 }
210 
211 
219 static void
221  struct GNUNET_SERVICE_Client *client,
222  void *app_cls)
223 {
224  GNUNET_assert (client == app_cls);
225 }
226 
227 
234 static void
236  const struct QueryMessage *qm)
237 {
238  struct GNUNET_SERVICE_Client *client = cls;
239  struct GNUNET_MQ_Envelope *env;
240  struct QueryResponseMessage *qrm;
241  struct GNUNET_HashCode hc;
242  int res;
243 
244  GNUNET_CRYPTO_hash (&qm->key,
245  sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey),
246  &hc);
247  res = GNUNET_CONTAINER_multihashmap_contains (revocation_map,
248  &hc);
250  (GNUNET_NO == res)
251  ? "Received revocation check for valid key `%s' from client\n"
252  : "Received revocation check for revoked key `%s' from client\n",
253  GNUNET_h2s (&hc));
254  env = GNUNET_MQ_msg (qrm,
256  qrm->is_valid = htonl ((GNUNET_YES == res) ? GNUNET_NO : GNUNET_YES);
258  env);
260 }
261 
262 
271 static int
272 do_flood (void *cls,
273  const struct GNUNET_PeerIdentity *target,
274  void *value)
275 {
276  const struct RevokeMessage *rm = cls;
277  struct PeerEntry *pe = value;
278  struct GNUNET_MQ_Envelope *e;
279  struct RevokeMessage *cp;
280 
281  if (NULL == pe->mq)
282  return GNUNET_OK; /* peer connected to us via SET,
283  but we have no direct CORE
284  connection for flooding */
285  e = GNUNET_MQ_msg (cp,
287  *cp = *rm;
289  "Flooding revocation to `%s'\n",
290  GNUNET_i2s (target));
291  GNUNET_MQ_send (pe->mq,
292  e);
293  return GNUNET_OK;
294 }
295 
296 
306 static int
307 publicize_rm (const struct RevokeMessage *rm)
308 {
309  struct RevokeMessage *cp;
310  struct GNUNET_HashCode hc;
311  struct GNUNET_SET_Element e;
312 
314  sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey),
315  &hc);
316  if (GNUNET_YES ==
318  &hc))
319  {
321  "Duplicate revocation received from peer. Ignored.\n");
322  return GNUNET_OK;
323  }
324  if (GNUNET_OK !=
326  {
327  GNUNET_break_op (0);
328  return GNUNET_SYSERR;
329  }
330  /* write to disk */
331  if (sizeof (struct RevokeMessage) !=
332  GNUNET_DISK_file_write (revocation_db,
333  rm,
334  sizeof (struct RevokeMessage)))
335  {
337  "write");
338  return GNUNET_NO;
339  }
340  if (GNUNET_OK !=
341  GNUNET_DISK_file_sync (revocation_db))
342  {
344  "sync");
345  return GNUNET_NO;
346  }
347  /* keep copy in memory */
348  cp = (struct RevokeMessage *) GNUNET_copy_message (&rm->header);
350  GNUNET_CONTAINER_multihashmap_put (revocation_map,
351  &hc,
352  cp,
354  /* add to set for future connections */
355  e.size = htons (rm->header.size);
357  e.data = rm;
358  if (GNUNET_OK !=
359  GNUNET_SET_add_element (revocation_set,
360  &e,
361  NULL,
362  NULL))
363  {
364  GNUNET_break (0);
365  return GNUNET_OK;
366  }
367  else
368  {
370  "Added revocation info to SET\n");
371  }
372  /* flood to neighbours */
374  &do_flood,
375  cp);
376  return GNUNET_OK;
377 }
378 
379 
386 static void
388  const struct RevokeMessage *rm)
389 {
390  struct GNUNET_SERVICE_Client *client = cls;
391  struct GNUNET_MQ_Envelope *env;
392  struct RevocationResponseMessage *rrm;
393  int ret;
394 
396  "Received REVOKE message from client\n");
397  if (GNUNET_SYSERR == (ret = publicize_rm (rm)))
398  {
399  GNUNET_break_op (0);
401  return;
402  }
403  env = GNUNET_MQ_msg (rrm,
405  rrm->is_valid = htonl ((GNUNET_OK == ret) ? GNUNET_NO : GNUNET_YES);
407  env);
409 }
410 
411 
418 static void
419 handle_p2p_revoke (void *cls,
420  const struct RevokeMessage *rm)
421 {
423  "Received REVOKE message\n");
425  publicize_rm (rm));
426 }
427 
428 
439 static void
440 add_revocation (void *cls,
441  const struct GNUNET_SET_Element *element,
442  uint64_t current_size,
444 {
445  struct PeerEntry *peer_entry = cls;
446  const struct RevokeMessage *rm;
447 
448  switch (status)
449  {
451  if (element->size != sizeof (struct RevokeMessage))
452  {
453  GNUNET_break_op (0);
454  return;
455  }
457  {
459  gettext_noop ("# unsupported revocations received via set union"),
460  1,
461  GNUNET_NO);
462  return;
463  }
464  rm = element->data;
465  (void) handle_p2p_revoke (NULL,
466  rm);
468  gettext_noop ("# revocation messages received via set union"),
469  1, GNUNET_NO);
470  break;
473  _("Error computing revocation set union with %s\n"),
474  GNUNET_i2s (&peer_entry->id));
475  peer_entry->so = NULL;
477  gettext_noop ("# revocation set unions failed"),
478  1,
479  GNUNET_NO);
480  break;
482  break;
484  peer_entry->so = NULL;
486  gettext_noop ("# revocation set unions completed"),
487  1,
488  GNUNET_NO);
489  break;
490  default:
491  GNUNET_break (0);
492  break;
493  }
494 }
495 
496 
503 static void
504 transmit_task_cb (void *cls)
505 {
506  struct PeerEntry *peer_entry = cls;
507 
509  "Starting set exchange with peer `%s'\n",
510  GNUNET_i2s (&peer_entry->id));
511  peer_entry->transmit_task = NULL;
512  GNUNET_assert (NULL == peer_entry->so);
513  peer_entry->so = GNUNET_SET_prepare (&peer_entry->id,
515  NULL,
517  (struct GNUNET_SET_Option[]) {{ 0 }},
519  peer_entry);
520  if (GNUNET_OK !=
521  GNUNET_SET_commit (peer_entry->so,
522  revocation_set))
523  {
525  _("SET service crashed, terminating revocation service\n"));
527  return;
528  }
529 }
530 
531 
539 static void *
541  const struct GNUNET_PeerIdentity *peer,
542  struct GNUNET_MQ_Handle *mq)
543 {
544  struct PeerEntry *peer_entry;
545  struct GNUNET_HashCode my_hash;
546  struct GNUNET_HashCode peer_hash;
547 
548  if (0 == GNUNET_memcmp (peer,
549  &my_identity))
550  {
551  return NULL;
552  }
553 
555  "Peer `%s' connected to us\n",
556  GNUNET_i2s (peer));
558  "# peers connected",
559  1,
560  GNUNET_NO);
561  peer_entry = GNUNET_CONTAINER_multipeermap_get (peers,
562  peer);
563  if (NULL != peer_entry)
564  {
565  /* This can happen if "core"'s notification is a tad late
566  and CADET+SET were faster and already produced a
567  #handle_revocation_union_request() for us to deal
568  with. This should be rare, but isn't impossible. */
569  peer_entry->mq = mq;
570  return peer_entry;
571  }
572  peer_entry = new_peer_entry (peer);
573  peer_entry->mq = mq;
575  sizeof (my_identity),
576  &my_hash);
577  GNUNET_CRYPTO_hash (peer,
578  sizeof (*peer),
579  &peer_hash);
580  if (0 < GNUNET_CRYPTO_hash_cmp (&my_hash,
581  &peer_hash))
582  {
584  "Starting SET operation with peer `%s'\n",
585  GNUNET_i2s (peer));
586  peer_entry->transmit_task =
589  peer_entry);
590  }
591  return peer_entry;
592 }
593 
594 
603 static void
605  const struct GNUNET_PeerIdentity *peer,
606  void *internal_cls)
607 {
608  struct PeerEntry *peer_entry = internal_cls;
609 
610  if (0 == GNUNET_memcmp (peer,
611  &my_identity))
612  return;
613  GNUNET_assert (NULL != peer_entry);
615  "Peer `%s' disconnected from us\n",
616  GNUNET_i2s (peer));
619  peer,
620  peer_entry));
621  if (NULL != peer_entry->transmit_task)
622  {
624  peer_entry->transmit_task = NULL;
625  }
626  if (NULL != peer_entry->so)
627  {
628  GNUNET_SET_operation_cancel (peer_entry->so);
629  peer_entry->so = NULL;
630  }
631  GNUNET_free (peer_entry);
633  "# peers connected",
634  -1,
635  GNUNET_NO);
636 }
637 
638 
647 static int
648 free_entry (void *cls,
649  const struct GNUNET_HashCode *key,
650  void *value)
651 {
652  GNUNET_free (value);
653  return GNUNET_OK;
654 }
655 
656 
662 static void
663 shutdown_task (void *cls)
664 {
665  if (NULL != revocation_set)
666  {
667  GNUNET_SET_destroy (revocation_set);
668  revocation_set = NULL;
669  }
670  if (NULL != revocation_union_listen_handle)
671  {
672  GNUNET_SET_listen_cancel (revocation_union_listen_handle);
673  revocation_union_listen_handle = NULL;
674  }
675  if (NULL != core_api)
676  {
677  GNUNET_CORE_disconnect (core_api);
678  core_api = NULL;
679  }
680  if (NULL != stats)
681  {
683  stats = NULL;
684  }
685  if (NULL != peers)
686  {
688  peers = NULL;
689  }
690  if (NULL != revocation_db)
691  {
692  GNUNET_DISK_file_close (revocation_db);
693  revocation_db = NULL;
694  }
696  &free_entry,
697  NULL);
698  GNUNET_CONTAINER_multihashmap_destroy (revocation_map);
699 }
700 
701 
708 static void
709 core_init (void *cls,
710  const struct GNUNET_PeerIdentity *identity)
711 {
712  if (NULL == identity)
713  {
715  "Connection to core FAILED!\n");
717  return;
718  }
720 }
721 
722 
738 static void
740  const struct GNUNET_PeerIdentity *other_peer,
741  const struct GNUNET_MessageHeader *context_msg,
742  struct GNUNET_SET_Request *request)
743 {
744  struct PeerEntry *peer_entry;
745 
746  if (NULL == request)
747  {
748  GNUNET_break (0);
749  return;
750  }
752  "Received set exchange request from peer `%s'\n",
753  GNUNET_i2s (other_peer));
754  peer_entry = GNUNET_CONTAINER_multipeermap_get (peers,
755  other_peer);
756  if (NULL == peer_entry)
757  {
758  peer_entry = new_peer_entry (other_peer);
759  }
760  if (NULL != peer_entry->so)
761  {
762  GNUNET_break_op (0);
763  return;
764  }
765  peer_entry->so = GNUNET_SET_accept (request,
767  (struct GNUNET_SET_Option[]) {{ 0 }},
769  peer_entry);
770  if (GNUNET_OK !=
771  GNUNET_SET_commit (peer_entry->so,
772  revocation_set))
773  {
774  GNUNET_break (0);
776  return;
777  }
778 }
779 
780 
788 static void
789 run (void *cls,
790  const struct GNUNET_CONFIGURATION_Handle *c,
792 {
793  struct GNUNET_MQ_MessageHandler core_handlers[] = {
794  GNUNET_MQ_hd_fixed_size (p2p_revoke,
796  struct RevokeMessage,
797  NULL),
799  };
800  char *fn;
801  uint64_t left;
802  struct RevokeMessage *rm;
803  struct GNUNET_HashCode hc;
804 
805  GNUNET_CRYPTO_hash ("revocation-set-union-application-id",
806  strlen ("revocation-set-union-application-id"),
808  if (GNUNET_OK !=
810  "REVOCATION",
811  "DATABASE",
812  &fn))
813  {
815  "REVOCATION",
816  "DATABASE");
818  return;
819  }
820  cfg = c;
821  revocation_map = GNUNET_CONTAINER_multihashmap_create (16,
822  GNUNET_NO);
823  if (GNUNET_OK !=
825  "REVOCATION",
826  "WORKBITS",
828  {
830  "REVOCATION",
831  "WORKBITS");
833  GNUNET_free (fn);
834  return;
835  }
836  if (revocation_work_required >= sizeof (struct GNUNET_HashCode) * 8)
837  {
839  "REVOCATION",
840  "WORKBITS",
841  _("Value is too large.\n"));
843  GNUNET_free (fn);
844  return;
845  }
846  revocation_set = GNUNET_SET_create (cfg,
848  revocation_union_listen_handle
849  = GNUNET_SET_listen (cfg,
853  NULL);
854  revocation_db = GNUNET_DISK_file_open (fn,
860  if (NULL == revocation_db)
861  {
863  "REVOCATION",
864  "DATABASE",
865  _("Could not open revocation database file!"));
867  GNUNET_free (fn);
868  return;
869  }
870  if (GNUNET_OK !=
872  left = 0;
873  while (left > sizeof (struct RevokeMessage))
874  {
875  rm = GNUNET_new (struct RevokeMessage);
876  if (sizeof (struct RevokeMessage) !=
877  GNUNET_DISK_file_read (revocation_db,
878  rm,
879  sizeof (struct RevokeMessage)))
880  {
882  "read",
883  fn);
884  GNUNET_free (rm);
886  GNUNET_free (fn);
887  return;
888  }
889  GNUNET_break (0 == ntohl (rm->reserved));
891  sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey),
892  &hc);
894  GNUNET_CONTAINER_multihashmap_put (revocation_map,
895  &hc,
896  rm,
898  }
899  GNUNET_free (fn);
900 
902  NULL);
904  GNUNET_YES);
905  /* Connect to core service and register core handlers */
906  core_api = GNUNET_CORE_connect (cfg, /* Main configuration */
907  NULL, /* Closure passed to functions */
908  &core_init, /* Call core_init once connected */
909  &handle_core_connect, /* Handle connects */
910  &handle_core_disconnect, /* Handle disconnects */
911  core_handlers); /* Register these handlers */
912  if (NULL == core_api)
913  {
915  return;
916  }
917  stats = GNUNET_STATISTICS_create ("revocation",
918  cfg);
919 }
920 
921 
926 ("revocation",
928  &run,
931  NULL,
932  GNUNET_MQ_hd_fixed_size (query_message,
934  struct QueryMessage,
935  NULL),
936  GNUNET_MQ_hd_fixed_size (revoke_message,
938  struct RevokeMessage,
939  NULL),
941 
942 
943 #if defined(LINUX) && defined(__GLIBC__)
944 #include <malloc.h>
945 
949 void __attribute__ ((constructor))
950 GNUNET_REVOCATION_memory_init ()
951 {
952  mallopt (M_TRIM_THRESHOLD, 4 * 1024);
953  mallopt (M_TOP_PAD, 1 * 1024);
954  malloc_trim (0);
955 }
956 
957 #endif
958 
959 
960 /* end of gnunet-service-revocation.c */
#define GNUNET_MESSAGE_TYPE_REVOCATION_QUERY
Client to service: was this key revoked?
Client gets only elements that have been added to the set.
static void shutdown_task(void *cls)
Task run during shutdown.
int GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:2133
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:1013
Create file if it doesn&#39;t exist.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
static int do_flood(void *cls, const struct GNUNET_PeerIdentity *target, void *value)
Flood the given revocation message to all neighbours.
static void handle_p2p_revoke(void *cls, const struct RevokeMessage *rm)
Core handler for flooded revocation messages.
static void * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
struct GNUNET_CRYPTO_EcdsaSignature signature
Signature confirming revocation.
Definition: revocation.h:101
static void handle_query_message(void *cls, const struct QueryMessage *qm)
Handle QUERY message from client.
int GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1817
int GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
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:686
int GNUNET_CRYPTO_ecdsa_verify(uint32_t purpose, const struct GNUNET_CRYPTO_EccSignaturePurpose *validate, const struct GNUNET_CRYPTO_EcdsaSignature *sig, const struct GNUNET_CRYPTO_EcdsaPublicKey *pub)
Verify ECDSA signature.
Definition: crypto_ecc.c:1048
Context for the core service connection.
Definition: core_api.c:78
Handle for a set operation request from another peer.
Definition: set_api.c:115
Per-peer information.
Handle to a service.
Definition: service.c:116
static const struct GNUNET_CONFIGURATION_Handle * cfg
Handle to our current configuration.
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2734
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:881
static int verify_revoke_message(const struct RevokeMessage *rm)
An revoke message has been received, check that it is well-formed.
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:1293
struct GNUNET_SET_OperationHandle * so
Handle to active set union operation (over revocation sets).
Element stored in a set.
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
Block type for a revocation message by which a key is revoked.
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:656
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_TIME_UNIT_SECONDS
One second.
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Must have purpose GNUNET_SIGNATURE_PURPOSE_REVOCATION, size expands over the public key...
Definition: revocation.h:107
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
static int publicize_rm(const struct RevokeMessage *rm)
Publicize revocation message.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
static void * client_connect_cb(void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
Handle client connecting to the service.
static struct Experiment * e
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_HashMapIterator it, void *it_cls)
Iterate over all entries in the map.
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_NO
Definition: gnunet_common.h:81
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
static void core_init(void *cls, const struct GNUNET_PeerIdentity *identity)
Called on core init/fail.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_SET_OperationHandle * GNUNET_SET_prepare(const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_HashCode *app_id, const struct GNUNET_MessageHeader *context_msg, enum GNUNET_SET_ResultMode result_mode, struct GNUNET_SET_Option options[], GNUNET_SET_ResultIterator result_cb, void *result_cls)
Prepare a set operation to be evaluated with another peer.
Definition: set_api.c:812
void GNUNET_log_config_invalid(enum GNUNET_ErrorType kind, const char *section, const char *option, const char *required)
Log error message about invalid configuration option value.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
static struct GNUNET_DISK_FileHandle * revocation_db
File handle for the revocation database.
Query key revocation status.
Definition: revocation.h:36
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:524
static int ret
Final status code.
Definition: gnunet-arm.c:89
Handle for the service.
static int free_entry(void *cls, const struct GNUNET_HashCode *key, void *value)
Free all values in a hash map.
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE
Client to service OR peer-to-peer: revoke this key!
Success, all elements have been sent (and received).
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
Internal representation of the hash map.
#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.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
static void transmit_task_cb(void *cls)
The timeout for performing the set union has expired, run the set operation on the revocation certifi...
Handle to a client that is connected to a service.
Definition: service.c:249
void GNUNET_SET_destroy(struct GNUNET_SET_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: set_api.c:771
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1246
#define GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE
Service to client: answer if key was revoked!
Revoke key.
Definition: revocation.h:81
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
static char * value
Value of the record to add/remove.
Key revocation response.
Definition: revocation.h:59
The other peer refused to to the operation with us, or something went wrong.
static struct GNUNET_SET_Handle * revocation_set
Set from all revocations known to us.
Success, all elements have been returned (but the other peer might still be receiving some from us...
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
static char * fn
Filename of the unique file.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
Everything went ok, we are transmitting an element of the result (in set, or to be removed from set...
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:1049
GNUNET_SERVICE_MAIN("revocation", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(query_message, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, struct QueryMessage, NULL), GNUNET_MQ_hd_fixed_size(revoke_message, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, struct RevokeMessage, NULL), GNUNET_MQ_handler_end())
Define "main" method using service macro.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE
Service to client: revocation confirmed.
GNUNET_SET_Status
Status for the result callback.
messages for key revocation
uint16_t status
See PRISM_STATUS_*-constants.
uint64_t proof_of_work
Number that causes a hash collision with the public_key.
Definition: revocation.h:96
Internal representation of the hash map.
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
Message handler for a specific message type.
static int res
static struct GNUNET_HashCode revocation_set_union_app_id
Our application ID for set union operations.
Opaque handle to a set.
Definition: set_api.c:49
uint32_t is_valid
GNUNET_NO if revoked, GNUNET_YES if valid.
Definition: revocation.h:69
#define GNUNET_SIGNATURE_PURPOSE_REVOCATION
Signature for confirming a key revocation.
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
There must only be one value per key; storing a value should fail if a value under the same key alrea...
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static void client_disconnect_cb(void *cls, struct GNUNET_SERVICE_Client *client, void *app_cls)
Handle client connecting to the service.
static void add_revocation(void *cls, const struct GNUNET_SET_Element *element, uint64_t current_size, enum GNUNET_SET_Status status)
Callback for set operation results.
struct GNUNET_CORE_Handle * GNUNET_CORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_CORE_StartupCallback init, GNUNET_CORE_ConnectEventHandler connects, GNUNET_CORE_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Connect to the core service.
Definition: core_api.c:694
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:732
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
void GNUNET_SET_listen_cancel(struct GNUNET_SET_ListenHandle *lh)
Cancel the given listen operation.
Definition: set_api.c:1047
Option for set operations.
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.
Key revocation response.
Definition: revocation.h:120
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
int GNUNET_DISK_file_size(const char *filename, uint64_t *size, int include_symbolic_links, int single_file_mode)
Get the size of the file (or directory) of the given file (in bytes).
Definition: disk.c:289
struct GNUNET_MQ_Handle * mq
Queue for sending messages to this peer.
struct GNUNET_SCHEDULER_Task * transmit_task
Tasked used to trigger the set union operation.
Handle to an operation.
Definition: set_api.c:135
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE.
Definition: revocation.h:86
Handle to a message queue.
Definition: mq.c:85
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
Everybody can read.
static void handle_revoke_message(void *cls, const struct RevokeMessage *rm)
Handle REVOKE message from client.
enum RadiotapType __attribute__
The identity of the host (wraps the signing key of the peer).
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:1124
static unsigned long long revocation_work_required
Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.
struct GNUNET_CRYPTO_EcdsaPublicKey key
Key to check.
Definition: revocation.h:51
static struct PeerEntry * new_peer_entry(const struct GNUNET_PeerIdentity *peer)
Create a new PeerEntry and add it to the peers multipeermap.
configuration data
Definition: configuration.c:85
static void handle_revocation_union_request(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.
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:278
Public ECC key (always for Curve25519) encoded in a format suitable for network transmission and ECDS...
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
uint16_t size
Number of bytes in the buffer pointed to by data.
#define GNUNET_log(kind,...)
Entry in list of pending tasks.
Definition: scheduler.c:134
Open the file for both reading and writing.
static void run(void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
Handle network size estimate clients.
static void handle_core_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
Opaque handle to a listen operation.
Definition: set_api.c:186
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
static struct GNUNET_SET_ListenHandle * revocation_union_listen_handle
Handle for us listening to incoming revocation set union requests.
void GNUNET_SET_operation_cancel(struct GNUNET_SET_OperationHandle *oh)
Cancel the given set operation.
Definition: set_api.c:515
static struct GNUNET_CORE_Handle * core_api
Handle to the core service (for flooding)
Header for all communications.
struct GNUNET_CRYPTO_EcdsaPublicKey public_key
Key to revoke.
Definition: revocation.h:112
#define GNUNET_YES
Definition: gnunet_common.h:80
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
uint32_t is_valid
GNUNET_NO if revocation failed for internal reasons (e.g.
Definition: revocation.h:131
struct GNUNET_PeerIdentity id
What is the identity of the peer?
Set union, return all elements that are in at least one of the sets.
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1673
Handle used to access files (and pipes).
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_free(ptr)
Wrapper around free.
uint16_t element_type
Application-specific element type.
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:1081
struct GNUNET_MessageHeader * GNUNET_copy_message(const struct GNUNET_MessageHeader *msg)
Create a copy of the given message.
#define gettext_noop(String)
Definition: gettext.h:69
int GNUNET_REVOCATION_check_pow(const struct GNUNET_CRYPTO_EcdsaPublicKey *key, uint64_t pow, unsigned int matching_bits)
Check if the given proof-of-work value would be acceptable for revoking the given key...
uint32_t reserved
For alignment.
Definition: revocation.h:91
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:965