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3 Copyright (C) 2012-2015 GNUnet e.V.
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
21 * @author Martin Schanzenbach
22 * @file src/identity-provider/gnunet-service-identity-provider.c
23 * @brief Identity Token Service
27 #include "gnunet_util_lib.h"
28 #include "gnunet_constants.h"
29 #include "gnunet_protocols.h"
30 #include "gnunet_identity_service.h"
31 #include "gnunet_gnsrecord_lib.h"
32 #include "gnunet_namestore_service.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet_gns_service.h"
35 #include "gnunet_signatures.h"
36 #include "identity_provider.h"
37 #include "identity_token.h"
45 * Normal operation state
47 #define STATE_POST_INIT 1
50 * Minimum interval between updates
52 #define MIN_WAIT_TIME GNUNET_TIME_UNIT_MINUTES
55 * Standard token expiration time
57 #define DEFAULT_TOKEN_EXPIRATION_INTERVAL GNUNET_TIME_UNIT_HOURS
60 * Service state (to detect initial update pass)
65 * Head of ego entry DLL
67 static struct EgoEntry *ego_head;
70 * Tail of ego entry DLL
72 static struct EgoEntry *ego_tail;
77 static struct GNUNET_IDENTITY_Handle *identity_handle;
80 * Token expiration interval
82 static struct GNUNET_TIME_Relative token_expiration_interval;
87 static struct GNUNET_NAMESTORE_Handle *ns_handle;
92 static struct GNUNET_GNS_Handle *gns_handle;
97 static struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
102 static struct GNUNET_NAMESTORE_ZoneIterator *ns_it;
107 static struct GNUNET_SCHEDULER_Task * timeout_task;
113 static struct GNUNET_SCHEDULER_Task * update_task;
116 * Timeout for next update pass
118 static struct GNUNET_TIME_Relative min_rel_exp;
122 * Currently processed token
124 static struct IdentityToken *token;
127 * Label for currently processed token
132 * Scopes for processed token
137 * Expiration for processed token
139 static uint64_t rd_exp;
142 * ECDHE Privkey for processed token metadata
144 static struct GNUNET_CRYPTO_EcdhePrivateKey ecdhe_privkey;
147 * Handle to the statistics service.
149 static struct GNUNET_STATISTICS_Handle *stats;
152 * Notification context, simplifies client broadcasts.
154 static struct GNUNET_SERVER_NotificationContext *nc;
159 static const struct GNUNET_CONFIGURATION_Handle *cfg;
162 struct ExchangeHandle
168 struct GNUNET_SERVER_Client *client;
173 struct TokenTicket *ticket;
178 struct IdentityToken *token;
183 struct GNUNET_GNS_LookupRequest *lookup_request;
188 struct GNUNET_CRYPTO_EcdsaPrivateKey aud_privkey;
202 struct GNUNET_SERVER_Client *client;
207 struct GNUNET_CRYPTO_EcdsaPrivateKey iss_key;
212 struct GNUNET_CRYPTO_EcdsaPublicKey iss_pkey;
217 struct GNUNET_CRYPTO_EcdsaPublicKey aud_key;
222 struct GNUNET_TIME_Absolute expiration;
237 struct GNUNET_NAMESTORE_ZoneIterator *ns_it;
242 struct GNUNET_CONTAINER_MultiHashMap *attr_map;
247 struct IdentityToken *token;
252 struct TokenTicket *ticket;
257 struct GNUNET_NAMESTORE_QueueEntry *ns_qe;
260 * The label the token is stored under
266 * DLL for ego handles to egos containing the ID_ATTRS in a map in json_t format
274 struct EgoEntry *next;
279 struct EgoEntry *prev;
284 struct GNUNET_IDENTITY_Ego *ego;
287 * Attribute map. Contains the attributes as json_t
289 struct GNUNET_CONTAINER_MultiHashMap *attr_map;
292 * Attributes are old and should be updated if GNUNET_YES
294 int attributes_dirty;
298 * Continuation for token store call
301 * @param success error code
302 * @param emsg error message
305 store_token_cont (void *cls,
310 if (GNUNET_SYSERR == success)
312 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
313 "Failed to update token: %s\n",
317 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
322 * This function updates the old token with new attributes,
323 * removes deleted attributes and expiration times.
325 * @param cls the ego entry
326 * @param tc task context
329 handle_token_update (void *cls,
330 const struct GNUNET_SCHEDULER_TaskContext *tc)
332 char *token_metadata;
335 const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv_key;
336 struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
337 struct GNUNET_CRYPTO_EcdhePrivateKey *new_ecdhe_privkey;
338 struct EgoEntry *ego_entry = cls;
339 struct GNUNET_GNSRECORD_Data token_record[2];
340 struct GNUNET_HashCode key_hash;
341 struct GNUNET_TIME_Relative token_rel_exp;
342 struct GNUNET_TIME_Relative token_ttl;
343 struct GNUNET_TIME_Absolute token_exp;
344 struct GNUNET_TIME_Absolute token_nbf;
345 struct GNUNET_TIME_Absolute new_exp;
346 struct GNUNET_TIME_Absolute new_iat;
347 struct GNUNET_TIME_Absolute new_nbf;
348 struct IdentityToken *new_token;
349 struct TokenAttr *cur_value;
350 struct TokenAttr *attr;
351 size_t token_metadata_len;
353 priv_key = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
354 GNUNET_IDENTITY_ego_get_public_key (ego_entry->ego,
357 //Note: We need the token expiration time here. Not the record expiration
359 //There are two types of tokens: Token that expire on GNS level with
360 //an absolute expiration time. Those are basically tokens that will
361 //be automatically revoked on (record)expiration.
362 //Tokens stored with relative expiration times will expire on the token level (token expiration)
363 //but this service will reissue new tokens that can be retrieved from GNS
366 for (attr = token->attr_head; NULL != attr; attr = attr->next)
368 if (0 == strcmp (attr->name, "exp"))
370 sscanf (attr->val_head->value,
372 &token_exp.abs_value_us);
373 } else if (0 == strcmp (attr->name, "nbf")) {
374 sscanf (attr->val_head->value,
376 &token_nbf.abs_value_us);
379 token_rel_exp = GNUNET_TIME_absolute_get_difference (token_nbf, token_exp);
381 token_ttl = GNUNET_TIME_absolute_get_remaining (token_exp);
382 if (0 != GNUNET_TIME_absolute_get_remaining (token_exp).rel_value_us)
384 //This token is not yet expired! Save and skip
385 if (min_rel_exp.rel_value_us > token_ttl.rel_value_us)
387 min_rel_exp = token_ttl;
393 GNUNET_free (scopes);
395 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
399 "Token is expired. Create a new one\n");
400 new_token = token_create (&pub_key,
402 new_exp = GNUNET_TIME_relative_to_absolute (token_rel_exp);
403 new_nbf = GNUNET_TIME_absolute_get ();
405 for (attr = token->attr_head; NULL != attr; attr = attr->next)
407 if (0 == strcmp (attr->name, "exp"))
409 token_add_attr_int (new_token, attr->name, new_exp.abs_value_us);
411 else if (0 == strcmp (attr->name, "nbf"))
413 token_add_attr_int (new_token, attr->name, new_nbf.abs_value_us);
415 else if (0 == strcmp (attr->name, "iat"))
417 token_add_attr_int (new_token, attr->name, new_iat.abs_value_us);
419 else if ((0 == strcmp (attr->name, "iss"))
420 || (0 == strcmp (attr->name, "aud")))
424 else if (0 == strcmp (attr->name, "sub"))
426 token_add_attr (new_token,
428 attr->val_head->value);
432 GNUNET_CRYPTO_hash (attr->name,
435 //Check if attr still exists. omit of not
437 GNUNET_CONTAINER_multihashmap_contains (ego_entry->attr_map,
440 cur_value = GNUNET_CONTAINER_multihashmap_get (ego_entry->attr_map,
442 GNUNET_CONTAINER_DLL_insert (new_token->attr_head,
443 new_token->attr_tail,
449 // reassemble and set
450 GNUNET_assert (token_serialize (new_token,
455 token_record[0].data = enc_token_str;
456 token_record[0].data_size = strlen (enc_token_str) + 1;
457 token_record[0].expiration_time = rd_exp; //Old expiration time
458 token_record[0].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN;
459 token_record[0].flags = GNUNET_GNSRECORD_RF_NONE;
462 token_metadata_len = sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey)
463 + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)
464 + strlen (scopes) + 1; //With 0-Terminator
465 token_metadata = GNUNET_malloc (token_metadata_len);
466 write_ptr = token_metadata;
467 memcpy (token_metadata, new_ecdhe_privkey, sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
468 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
469 memcpy (write_ptr, &token->aud_key, sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
470 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
471 memcpy (write_ptr, scopes, strlen (scopes) + 1); //with 0-Terminator;
473 token_record[1].data = token_metadata;
474 token_record[1].data_size = token_metadata_len;
475 token_record[1].expiration_time = rd_exp;
476 token_record[1].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA;
477 token_record[1].flags = GNUNET_GNSRECORD_RF_PRIVATE;
479 ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, ">>> Updating Token w/ %s\n", new_token);
487 token_destroy (new_token);
488 token_destroy (token);
489 GNUNET_free (new_ecdhe_privkey);
490 GNUNET_free (enc_token_str);
494 GNUNET_free (scopes);
499 update_identities(void *cls,
500 const struct GNUNET_SCHEDULER_TaskContext *tc);
508 * @param value the json_t attribute value
512 clear_ego_attrs (void *cls,
513 const struct GNUNET_HashCode *key,
516 struct TokenAttr *attr = value;
517 struct TokenAttrValue *val;
518 struct TokenAttrValue *tmp_val;
519 for (val = attr->val_head; NULL != val;)
522 GNUNET_CONTAINER_DLL_remove (attr->val_head,
525 GNUNET_free (val->value);
529 GNUNET_free (attr->name);
537 * Update all ID_TOKEN records for an identity and store them
539 * @param cls the identity entry
540 * @param zone the identity
541 * @param lbl the name of the record
542 * @param rd_count number of records
543 * @param rd record data
547 token_collect (void *cls,
548 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
550 unsigned int rd_count,
551 const struct GNUNET_GNSRECORD_Data *rd)
553 struct EgoEntry *ego_entry = cls;
554 const struct GNUNET_GNSRECORD_Data *token_record;
555 const struct GNUNET_GNSRECORD_Data *token_metadata_record;
556 struct GNUNET_CRYPTO_EcdsaPublicKey *aud_key;
561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
562 ">>> Updating Ego finished\n");
563 //Clear attribute map for ego
564 GNUNET_CONTAINER_multihashmap_iterate (ego_entry->attr_map,
567 GNUNET_CONTAINER_multihashmap_clear (ego_entry->attr_map);
568 update_task = GNUNET_SCHEDULER_add_now (&update_identities,
573 //There should be only a single record for a token under a label
576 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
580 if (rd[0].record_type == GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
582 token_metadata_record = &rd[0];
583 token_record = &rd[1];
585 token_record = &rd[0];
586 token_metadata_record = &rd[1];
588 if (token_metadata_record->record_type != GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
590 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
593 if (token_record->record_type == GNUNET_GNSRECORD_TYPE_ID_TOKEN)
595 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
599 //Get metadata and decrypt token
600 ecdhe_privkey = *((struct GNUNET_CRYPTO_EcdhePrivateKey *)token_metadata_record->data);
601 aud_key = (struct GNUNET_CRYPTO_EcdsaPublicKey *)&ecdhe_privkey+sizeof(struct GNUNET_CRYPTO_EcdhePrivateKey);
602 scopes = GNUNET_strdup ((char*) aud_key+sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
604 token_parse2 (token_record->data,
609 label = GNUNET_strdup (lbl);
610 rd_exp = token_record->expiration_time;
612 GNUNET_SCHEDULER_add_now (&handle_token_update, ego_entry);
618 * Collect all ID_ATTR records for an identity and store them
620 * @param cls the identity entry
621 * @param zone the identity
622 * @param lbl the name of the record
623 * @param rd_count number of records
624 * @param rd record data
628 attribute_collect (void *cls,
629 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
631 unsigned int rd_count,
632 const struct GNUNET_GNSRECORD_Data *rd)
634 struct EgoEntry *ego_entry = cls;
635 struct GNUNET_HashCode key;
636 struct TokenAttr *attr;
637 struct TokenAttrValue *val;
644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
645 ">>> Updating Attributes finished\n");
646 ego_entry->attributes_dirty = GNUNET_NO;
647 update_task = GNUNET_SCHEDULER_add_now (&update_identities, ego_entry);
653 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
656 GNUNET_CRYPTO_hash (lbl,
661 if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
663 val_str = GNUNET_GNSRECORD_value_to_string (rd->record_type,
666 attr = GNUNET_malloc (sizeof (struct TokenAttr));
667 attr->name = GNUNET_strdup (lbl);
668 val = GNUNET_malloc (sizeof (struct TokenAttrValue));
669 val->value = val_str;
670 GNUNET_CONTAINER_DLL_insert (attr->val_head,
673 GNUNET_CONTAINER_multihashmap_put (ego_entry->attr_map,
676 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
679 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
683 attr = GNUNET_malloc (sizeof (struct TokenAttr));
684 attr->name = GNUNET_strdup (lbl);
685 for (i = 0; i < rd_count; i++)
687 if (rd[i].record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
689 val_str = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
692 val = GNUNET_malloc (sizeof (struct TokenAttrValue));
693 val->value = val_str;
694 GNUNET_CONTAINER_DLL_insert (attr->val_head,
699 GNUNET_CONTAINER_multihashmap_put (ego_entry->attr_map,
702 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
703 GNUNET_NAMESTORE_zone_iterator_next (ns_it);
709 * Update identity information for ego. If attribute map is
710 * dirty, first update the attributes.
712 * @param cls the ego to update
713 * param tc task context
717 update_identities(void *cls,
718 const struct GNUNET_SCHEDULER_TaskContext *tc)
720 struct EgoEntry *next_ego = cls;
721 const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv_key;
723 if (NULL == next_ego)
725 if (min_rel_exp.rel_value_us < MIN_WAIT_TIME.rel_value_us)
726 min_rel_exp = MIN_WAIT_TIME;
727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
728 ">>> Finished. Rescheduling in %d\n",
729 min_rel_exp.rel_value_us);
731 //finished -> reschedule
732 update_task = GNUNET_SCHEDULER_add_delayed (min_rel_exp,
735 min_rel_exp.rel_value_us = 0;
738 priv_key = GNUNET_IDENTITY_ego_get_private_key (next_ego->ego);
739 if (GNUNET_YES == next_ego->attributes_dirty)
741 //Starting over. We must update the Attributes for they might have changed.
742 ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
750 //Ego will be dirty next time
751 next_ego->attributes_dirty = GNUNET_YES;
752 ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
762 * Function called initially to start update task
767 GNUNET_log (GNUNET_ERROR_TYPE_INFO, ">>> Starting Service\n");
768 //Initially iterate all itenties and refresh all tokens
769 update_task = GNUNET_SCHEDULER_add_now (&update_identities, ego_head);
773 * Initial ego collection function.
778 * @param identifier ego name
782 struct GNUNET_IDENTITY_Ego *ego,
784 const char *identifier)
786 struct EgoEntry *new_entry;
787 if ((NULL == ego) && (STATE_INIT == state))
789 state = STATE_POST_INIT;
793 if (STATE_INIT == state) {
794 new_entry = GNUNET_malloc (sizeof (struct EgoEntry));
795 new_entry->ego = ego;
796 new_entry->attr_map = GNUNET_CONTAINER_multihashmap_create (5,
798 new_entry->attributes_dirty = GNUNET_YES;
799 GNUNET_CONTAINER_DLL_insert_tail(ego_head, ego_tail, new_entry);
809 struct EgoEntry *ego_entry;
810 struct EgoEntry *ego_tmp;
812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
816 GNUNET_SERVER_notification_context_destroy (nc);
821 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
825 if (NULL != timeout_task)
826 GNUNET_SCHEDULER_cancel (timeout_task);
827 if (NULL != update_task)
828 GNUNET_SCHEDULER_cancel (update_task);
829 if (NULL != identity_handle)
830 GNUNET_IDENTITY_disconnect (identity_handle);
831 if (NULL != gns_handle)
832 GNUNET_GNS_disconnect (gns_handle);
834 GNUNET_NAMESTORE_zone_iteration_stop (ns_it);
836 GNUNET_NAMESTORE_cancel (ns_qe);
837 if (NULL != ns_handle)
838 GNUNET_NAMESTORE_disconnect (ns_handle);
844 for (ego_entry = ego_head;
848 if (0 != GNUNET_CONTAINER_multihashmap_size (ego_tmp->attr_map))
850 GNUNET_CONTAINER_multihashmap_iterate (ego_tmp->attr_map,
855 GNUNET_CONTAINER_multihashmap_destroy (ego_tmp->attr_map);
856 ego_entry = ego_entry->next;
857 GNUNET_free (ego_tmp);
865 * @param tc task context
868 do_shutdown (void *cls,
869 const struct GNUNET_SCHEDULER_TaskContext *tc)
871 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
872 "Shutting down...\n");
877 static struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage*
878 create_exchange_result_message (const char* token,
880 uint64_t ticket_nonce)
882 struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm;
883 uint16_t token_len = strlen (token) + 1;
884 erm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)
886 erm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE_RESULT);
887 erm->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)
889 erm->ticket_nonce = htonl (ticket_nonce);
890 memcpy (&erm[1], token, token_len);
895 static struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage*
896 create_issue_result_message (const char* label,
900 struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm;
903 irm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage)
905 + strlen (ticket) + 1
906 + strlen (token) + 1);
907 irm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_RESULT);
908 irm->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage)
910 + strlen (ticket) + 1
911 + strlen (token) + 1);
912 GNUNET_asprintf (&tmp_str, "%s,%s,%s", label, ticket, token);
913 memcpy (&irm[1], tmp_str, strlen (tmp_str) + 1);
914 GNUNET_free (tmp_str);
919 cleanup_issue_handle (struct IssueHandle *handle)
921 if (NULL != handle->attr_map)
922 GNUNET_CONTAINER_multihashmap_destroy (handle->attr_map);
923 if (NULL != handle->scopes)
924 GNUNET_free (handle->scopes);
925 if (NULL != handle->token)
926 token_destroy (handle->token);
927 if (NULL != handle->ticket)
928 ticket_destroy (handle->ticket);
929 if (NULL != handle->label)
930 GNUNET_free (handle->label);
931 GNUNET_free (handle);
935 store_token_issue_cont (void *cls,
939 struct IssueHandle *handle = cls;
940 struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm;
943 handle->ns_qe = NULL;
944 if (GNUNET_SYSERR == success)
946 cleanup_issue_handle (handle);
947 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
949 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
952 if (GNUNET_OK != ticket_serialize (handle->ticket,
956 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
957 "Error serializing ticket\n");
958 cleanup_issue_handle (handle);
959 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
962 if (GNUNET_OK != token_to_string (handle->token,
966 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
967 "Error serializing token\n");
968 GNUNET_free (ticket_str);
969 cleanup_issue_handle (handle);
970 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
973 irm = create_issue_result_message (handle->label, ticket_str, token_str);
974 GNUNET_SERVER_notification_context_unicast (nc,
978 GNUNET_SERVER_client_set_user_context (handle->client, NULL);
979 cleanup_issue_handle (handle);
981 GNUNET_free (ticket_str);
982 GNUNET_free (token_str);
986 * Build a GNUid token for identity
987 * @param handle the handle
988 * @param ego_entry the ego to build the token for
989 * @param name name of the ego
990 * @param token_aud token audience
991 * @param token the resulting gnuid token
992 * @return identifier string of token (label)
995 sign_and_return_token (void *cls,
996 const struct GNUNET_SCHEDULER_TaskContext *tc)
998 struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
999 struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
1000 struct IssueHandle *handle = cls;
1001 struct GNUNET_GNSRECORD_Data token_record[2];
1003 char *enc_token_str;
1004 char *token_metadata;
1008 size_t token_metadata_len;
1012 GNUNET_asprintf (&nonce_str, "%lu", handle->nonce);
1013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Request nonce: %s\n", nonce_str);
1015 GNUNET_CRYPTO_ecdsa_key_get_public (&handle->iss_key,
1017 handle->ticket = ticket_create (handle->nonce,
1022 time = GNUNET_TIME_absolute_get().abs_value_us;
1023 exp_time = time + token_expiration_interval.rel_value_us;
1025 token_add_attr_int (handle->token, "nbf", time);
1026 token_add_attr_int (handle->token, "iat", time);
1027 token_add_attr_int (handle->token, "exp", exp_time);
1028 token_add_attr (handle->token, "nonce", nonce_str);
1030 //Token in a serialized encrypted format
1031 GNUNET_assert (token_serialize (handle->token,
1036 //Token record E,E_K (Token)
1037 token_record[0].data = enc_token_str;
1038 token_record[0].data_size = strlen (enc_token_str) + 1;
1039 token_record[0].expiration_time = exp_time;
1040 token_record[0].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN;
1041 token_record[0].flags = GNUNET_GNSRECORD_RF_NONE;
1044 token_metadata_len = sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey)
1045 + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)
1046 + strlen (handle->scopes) + 1; //With 0-Terminator
1047 token_metadata = GNUNET_malloc (token_metadata_len);
1048 write_ptr = token_metadata;
1049 memcpy (token_metadata, ecdhe_privkey, sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
1050 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
1051 memcpy (write_ptr, &handle->aud_key, sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1052 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
1053 memcpy (write_ptr, handle->scopes, strlen (handle->scopes) + 1); //with 0-Terminator;
1055 token_record[1].data = token_metadata;
1056 token_record[1].data_size = token_metadata_len;
1057 token_record[1].expiration_time = exp_time;
1058 token_record[1].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA;
1059 token_record[1].flags = GNUNET_GNSRECORD_RF_PRIVATE;
1062 handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
1067 &store_token_issue_cont,
1069 GNUNET_free (ecdhe_privkey);
1070 GNUNET_free (nonce_str);
1071 GNUNET_free (enc_token_str);
1072 GNUNET_free (token_metadata);
1076 * Collect attributes for token
1079 attr_collect (void *cls,
1080 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
1082 unsigned int rd_count,
1083 const struct GNUNET_GNSRECORD_Data *rd)
1087 struct IssueHandle *handle = cls;
1088 struct GNUNET_HashCode key;
1092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute END: \n");
1093 handle->ns_it = NULL;
1094 GNUNET_SCHEDULER_add_now (&sign_and_return_token, handle);
1098 GNUNET_CRYPTO_hash (label,
1102 if (0 == rd_count ||
1103 ( (NULL != handle->attr_map) &&
1104 (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->attr_map,
1109 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute: %s\n", label);
1117 if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
1119 data = GNUNET_GNSRECORD_value_to_string (rd->record_type,
1122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
1123 token_add_attr (handle->token,
1128 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1133 for (; i < rd_count; i++)
1135 if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
1137 data = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
1140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
1141 token_add_attr (handle->token, label, data);
1146 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1150 cleanup_exchange_handle (struct ExchangeHandle *handle)
1152 if (NULL != handle->ticket)
1153 ticket_destroy (handle->ticket);
1154 if (NULL != handle->token)
1155 token_destroy (handle->token);
1156 GNUNET_free (handle);
1160 process_lookup_result (void *cls, uint32_t rd_count,
1161 const struct GNUNET_GNSRECORD_Data *rd)
1163 struct ExchangeHandle *handle = cls;
1164 struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm;
1168 handle->lookup_request = NULL;
1171 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1172 "Number of tokens %d != 2.",
1174 cleanup_exchange_handle (handle);
1175 GNUNET_SCHEDULER_add_now (&do_shutdown, handle);
1180 GNUNET_GNSRECORD_value_to_string (GNUNET_GNSRECORD_TYPE_ID_TOKEN,
1185 GNUNET_assert (GNUNET_OK == token_parse (record_str,
1186 &handle->aud_privkey,
1190 GNUNET_assert (GNUNET_OK == token_to_string (handle->token,
1191 &handle->aud_privkey,
1194 erm = create_exchange_result_message (token_str,
1196 handle->ticket->payload->nonce);
1197 GNUNET_SERVER_notification_context_unicast (nc,
1201 GNUNET_SERVER_client_set_user_context (handle->client, NULL);
1203 cleanup_exchange_handle (handle);
1204 GNUNET_free (record_str);
1205 GNUNET_free (token_str);
1214 * Handler for exchange message
1217 * @param client who sent the message
1218 * @param message the message
1221 handle_exchange_message (void *cls,
1222 struct GNUNET_SERVER_Client *client,
1223 const struct GNUNET_MessageHeader *message)
1225 const struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage *em;
1226 struct ExchangeHandle *xchange_handle;
1231 size = ntohs (message->size);
1232 if (size <= sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage))
1235 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1238 em = (const struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage *) message;
1239 ticket = (const char *) &em[1];
1240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1241 "Received EXCHANGE of `%s' from client\n",
1243 xchange_handle = GNUNET_malloc (sizeof (struct ExchangeHandle));
1244 xchange_handle->aud_privkey = em->aud_privkey;
1246 if (GNUNET_SYSERR == ticket_parse (ticket,
1247 &xchange_handle->aud_privkey,
1248 &xchange_handle->ticket))
1250 GNUNET_free (xchange_handle);
1251 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking for token under %s\n",
1255 xchange_handle->ticket->payload->label);
1256 GNUNET_asprintf (&lookup_query,
1258 xchange_handle->ticket->payload->label);
1259 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1260 GNUNET_SERVER_notification_context_add (nc, client);
1261 GNUNET_SERVER_client_set_user_context (client, xchange_handle);
1262 xchange_handle->client = client;
1263 xchange_handle->lookup_request = GNUNET_GNS_lookup (gns_handle,
1265 &xchange_handle->ticket->payload->identity_key,
1266 GNUNET_GNSRECORD_TYPE_ID_TOKEN,
1267 GNUNET_GNS_LO_LOCAL_MASTER,
1269 &process_lookup_result,
1271 GNUNET_free (lookup_query);
1278 * Look for existing token
1280 * @param cls the identity entry
1281 * @param zone the identity
1282 * @param lbl the name of the record
1283 * @param rd_count number of records
1284 * @param rd record data
1288 find_existing_token (void *cls,
1289 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
1291 unsigned int rd_count,
1292 const struct GNUNET_GNSRECORD_Data *rd)
1294 struct IssueHandle *handle = cls;
1295 const struct GNUNET_GNSRECORD_Data *token_metadata_record;
1296 struct GNUNET_CRYPTO_EcdsaPublicKey *aud_key;
1297 struct GNUNET_HashCode key;
1298 int scope_count_token;
1306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1307 ">>> No existing token found\n");
1310 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1312 GNUNET_STRINGS_base64_encode ((char*)&rnd_key,
1315 handle->ns_it = NULL;
1316 handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1323 //There should be only a single record for a token under a label
1326 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1330 if (rd[0].record_type == GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
1332 token_metadata_record = &rd[0];
1334 token_metadata_record = &rd[1];
1336 if (token_metadata_record->record_type != GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
1338 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1341 ecdhe_privkey = *((struct GNUNET_CRYPTO_EcdhePrivateKey *)token_metadata_record->data);
1343 (struct GNUNET_CRYPTO_EcdsaPublicKey *)(token_metadata_record->data+sizeof(struct GNUNET_CRYPTO_EcdhePrivateKey));
1344 tmp_scopes = GNUNET_strdup ((char*) aud_key+sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1346 if (0 != memcmp (aud_key, &handle->aud_key,
1347 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)))
1349 char *tmp2 = GNUNET_STRINGS_data_to_string_alloc (aud_key,
1350 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1351 //Audience does not match!
1352 char *tmp = GNUNET_GNSRECORD_value_to_string (GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA,
1353 token_metadata_record->data,
1354 token_metadata_record->data_size);
1355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1356 "Token does not match audience %s vs %s. Moving on\n",
1359 GNUNET_free (tmp_scopes);
1360 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1364 scope = strtok (tmp_scopes, ",");
1365 scope_count_token = 0;
1366 while (NULL != scope)
1368 GNUNET_CRYPTO_hash (scope,
1372 if ((NULL != handle->attr_map) &&
1373 (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->attr_map, &key)))
1375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1376 "Issued token does not include `%s'. Moving on\n", scope);
1377 GNUNET_free (tmp_scopes);
1378 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1381 scope_count_token++;
1382 scope = strtok (NULL, ",");
1384 GNUNET_free (tmp_scopes);
1385 //All scopes in token are also in request. Now
1387 if (GNUNET_CONTAINER_multihashmap_size (handle->attr_map) == scope_count_token)
1389 //We have an existing token
1390 handle->label = GNUNET_strdup (lbl);
1391 handle->ns_it = NULL;
1392 handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1399 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1400 "Nuber of attributes in token do not match request\n");
1402 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1408 * Handler for issue message
1411 * @param client who sent the message
1412 * @param message the message
1415 handle_issue_message (void *cls,
1416 struct GNUNET_SERVER_Client *client,
1417 const struct GNUNET_MessageHeader *message)
1419 const struct GNUNET_IDENTITY_PROVIDER_IssueMessage *im;
1425 struct GNUNET_HashCode key;
1426 struct IssueHandle *issue_handle;
1428 size = ntohs (message->size);
1429 if (size <= sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueMessage))
1432 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1435 im = (const struct GNUNET_IDENTITY_PROVIDER_IssueMessage *) message;
1436 scopes = (const char *) &im[1];
1437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1438 "Received ISSUE of `%s' from client\n",
1440 issue_handle = GNUNET_malloc (sizeof (struct IssueHandle));
1441 issue_handle->attr_map = GNUNET_CONTAINER_multihashmap_create (5,
1443 scopes_tmp = GNUNET_strdup (scopes);
1444 scope = strtok(scopes_tmp, ",");
1445 for (; NULL != scope; scope = strtok (NULL, ","))
1447 GNUNET_CRYPTO_hash (scope,
1450 GNUNET_CONTAINER_multihashmap_put (issue_handle->attr_map,
1453 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1455 GNUNET_free (scopes_tmp);
1457 issue_handle->aud_key = im->aud_key;
1458 issue_handle->iss_key = im->iss_key;
1459 GNUNET_CRYPTO_ecdsa_key_get_public (&im->iss_key,
1460 &issue_handle->iss_pkey);
1461 issue_handle->expiration = GNUNET_TIME_absolute_ntoh (im->expiration);
1462 issue_handle->nonce = ntohl (im->nonce);
1463 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1464 GNUNET_SERVER_notification_context_add (nc, client);
1465 GNUNET_SERVER_client_set_user_context (client, issue_handle);
1466 issue_handle->client = client;
1467 issue_handle->scopes = GNUNET_strdup (scopes);
1468 issue_handle->token = token_create (&issue_handle->iss_pkey,
1469 &issue_handle->aud_key);
1471 issue_handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1473 &find_existing_token,
1478 * Main function that will be run
1480 * @param cls closure
1481 * @param args remaining command-line arguments
1482 * @param cfgfile name of the configuration file used (for saving, can be NULL)
1483 * @param c configuration
1487 struct GNUNET_SERVER_Handle *server,
1488 const struct GNUNET_CONFIGURATION_Handle *c)
1490 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1491 {&handle_issue_message, NULL,
1492 GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE, 0},
1493 {&handle_exchange_message, NULL,
1494 GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE, 0},
1500 stats = GNUNET_STATISTICS_create ("identity-provider", cfg);
1501 GNUNET_SERVER_add_handlers (server, handlers);
1502 nc = GNUNET_SERVER_notification_context_create (server, 1);
1504 //Connect to identity and namestore services
1505 ns_handle = GNUNET_NAMESTORE_connect (cfg);
1506 if (NULL == ns_handle)
1508 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "error connecting to namestore");
1511 gns_handle = GNUNET_GNS_connect (cfg);
1512 if (NULL == gns_handle)
1514 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "error connecting to gns");
1517 identity_handle = GNUNET_IDENTITY_connect (cfg,
1522 GNUNET_CONFIGURATION_get_value_time (cfg,
1523 "identity-provider",
1524 "TOKEN_EXPIRATION_INTERVAL",
1525 &token_expiration_interval))
1527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1528 "Time window for zone iteration: %s\n",
1529 GNUNET_STRINGS_relative_time_to_string (token_expiration_interval,
1532 token_expiration_interval = DEFAULT_TOKEN_EXPIRATION_INTERVAL;
1535 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1536 &do_shutdown, NULL);
1544 * @param argc number of arguments from the cli
1545 * @param argv command line arguments
1546 * @return 0 ok, 1 on error
1550 main (int argc, char *const *argv)
1552 return (GNUNET_OK ==
1553 GNUNET_SERVICE_run (argc, argv, "identity-provider",
1554 GNUNET_SERVICE_OPTION_NONE,
1555 &run, NULL)) ? 0 : 1;
1558 /* end of gnunet-rest-server.c */