2 This file is part of GNUnet.
3 Copyright (C) 2012-2015 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
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
8 option) any later version.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
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,
881 struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm;
882 uint16_t token_len = strlen (token) + 1;
883 erm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)
885 erm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE_RESULT);
886 erm->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)
888 memcpy (&erm[1], token, token_len);
893 static struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage*
894 create_issue_result_message (const char* ticket)
896 struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm;
898 irm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage) + strlen(ticket) + 1);
899 irm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_RESULT);
900 irm->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage) + strlen (ticket) + 1);
901 memcpy (&irm[1], ticket, strlen (ticket) + 1);
906 cleanup_issue_handle (struct IssueHandle *handle)
908 if (NULL != handle->attr_map)
909 GNUNET_CONTAINER_multihashmap_destroy (handle->attr_map);
910 if (NULL != handle->scopes)
911 GNUNET_free (handle->scopes);
912 if (NULL != handle->token)
913 token_destroy (handle->token);
914 if (NULL != handle->ticket)
915 ticket_destroy (handle->ticket);
916 if (NULL != handle->label)
917 GNUNET_free (handle->label);
918 GNUNET_free (handle);
922 store_token_issue_cont (void *cls,
926 struct IssueHandle *handle = cls;
927 struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm;
928 char* token_ticket_str;
929 handle->ns_qe = NULL;
930 if (GNUNET_SYSERR == success)
932 cleanup_issue_handle (handle);
933 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
935 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
938 if (GNUNET_OK != ticket_serialize (handle->ticket,
942 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s\n",
943 "Error serializing ticket\n");
944 cleanup_issue_handle (handle);
945 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
948 irm = create_issue_result_message (token_ticket_str);
949 GNUNET_SERVER_notification_context_unicast (nc,
953 GNUNET_SERVER_client_set_user_context (handle->client, NULL);
954 cleanup_issue_handle (handle);
956 GNUNET_free (token_ticket_str);
960 * Build a GNUid token for identity
961 * @param handle the handle
962 * @param ego_entry the ego to build the token for
963 * @param name name of the ego
964 * @param token_aud token audience
965 * @param token the resulting gnuid token
966 * @return identifier string of token (label)
969 sign_and_return_token (void *cls,
970 const struct GNUNET_SCHEDULER_TaskContext *tc)
972 struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
973 struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe_privkey;
974 struct IssueHandle *handle = cls;
975 struct GNUNET_GNSRECORD_Data token_record[2];
978 char *token_metadata;
982 size_t token_metadata_len;
986 GNUNET_asprintf (&nonce_str, "%d", handle->nonce);
987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Request nonce: %s\n", nonce_str);
989 GNUNET_CRYPTO_ecdsa_key_get_public (&handle->iss_key,
991 handle->ticket = ticket_create (nonce_str,
996 time = GNUNET_TIME_absolute_get().abs_value_us;
997 exp_time = time + token_expiration_interval.rel_value_us;
999 token_add_attr_int (handle->token, "nbf", time);
1000 token_add_attr_int (handle->token, "iat", time);
1001 token_add_attr_int (handle->token, "exp", exp_time);
1002 token_add_attr (handle->token, "nonce", nonce_str);
1004 //Token in a serialized encrypted format
1005 GNUNET_assert (token_serialize (handle->token,
1010 //Token record E,E_K (Token)
1011 token_record[0].data = enc_token_str;
1012 token_record[0].data_size = strlen (enc_token_str) + 1;
1013 token_record[0].expiration_time = exp_time;
1014 token_record[0].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN;
1015 token_record[0].flags = GNUNET_GNSRECORD_RF_NONE;
1018 token_metadata_len = sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey)
1019 + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)
1020 + strlen (handle->scopes) + 1; //With 0-Terminator
1021 token_metadata = GNUNET_malloc (token_metadata_len);
1022 write_ptr = token_metadata;
1023 memcpy (token_metadata, ecdhe_privkey, sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
1024 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey);
1025 memcpy (write_ptr, &handle->aud_key, sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1026 write_ptr += sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
1027 memcpy (write_ptr, handle->scopes, strlen (handle->scopes) + 1); //with 0-Terminator;
1029 token_record[1].data = token_metadata;
1030 token_record[1].data_size = token_metadata_len;
1031 token_record[1].expiration_time = exp_time;
1032 token_record[1].record_type = GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA;
1033 token_record[1].flags = GNUNET_GNSRECORD_RF_PRIVATE;
1036 handle->ns_qe = GNUNET_NAMESTORE_records_store (ns_handle,
1041 &store_token_issue_cont,
1043 GNUNET_free (ecdhe_privkey);
1044 GNUNET_free (nonce_str);
1045 GNUNET_free (enc_token_str);
1046 GNUNET_free (token_metadata);
1050 * Collect attributes for token
1053 attr_collect (void *cls,
1054 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
1056 unsigned int rd_count,
1057 const struct GNUNET_GNSRECORD_Data *rd)
1061 struct IssueHandle *handle = cls;
1062 struct GNUNET_HashCode key;
1066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute END: \n");
1067 handle->ns_it = NULL;
1068 GNUNET_SCHEDULER_add_now (&sign_and_return_token, handle);
1072 GNUNET_CRYPTO_hash (label,
1076 if (0 == rd_count ||
1077 ( (NULL != handle->attr_map) &&
1078 (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->attr_map,
1083 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding attribute: %s\n", label);
1091 if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
1093 data = GNUNET_GNSRECORD_value_to_string (rd->record_type,
1096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
1097 token_add_attr (handle->token,
1102 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1107 for (; i < rd_count; i++)
1109 if (rd->record_type == GNUNET_GNSRECORD_TYPE_ID_ATTR)
1111 data = GNUNET_GNSRECORD_value_to_string (rd[i].record_type,
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Adding value: %s\n", data);
1115 token_add_attr (handle->token, label, data);
1120 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1124 cleanup_exchange_handle (struct ExchangeHandle *handle)
1126 if (NULL != handle->ticket)
1127 ticket_destroy (handle->ticket);
1128 if (NULL != handle->token)
1129 token_destroy (handle->token);
1130 GNUNET_free (handle);
1134 process_lookup_result (void *cls, uint32_t rd_count,
1135 const struct GNUNET_GNSRECORD_Data *rd)
1137 struct ExchangeHandle *handle = cls;
1138 struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm;
1142 handle->lookup_request = NULL;
1145 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1146 "Number of tokens %d != 2.",
1148 cleanup_exchange_handle (handle);
1149 GNUNET_SCHEDULER_add_now (&do_shutdown, handle);
1154 GNUNET_GNSRECORD_value_to_string (GNUNET_GNSRECORD_TYPE_ID_TOKEN,
1159 GNUNET_assert (GNUNET_OK == token_parse (record_str,
1160 &handle->aud_privkey,
1164 GNUNET_assert (GNUNET_OK == token_to_string (handle->token,
1165 &handle->aud_privkey,
1168 erm = create_exchange_result_message (token_str,
1170 GNUNET_SERVER_notification_context_unicast (nc,
1174 GNUNET_SERVER_client_set_user_context (handle->client, NULL);
1176 cleanup_exchange_handle (handle);
1177 GNUNET_free (record_str);
1178 GNUNET_free (token_str);
1187 * Handler for exchange message
1190 * @param client who sent the message
1191 * @param message the message
1194 handle_exchange_message (void *cls,
1195 struct GNUNET_SERVER_Client *client,
1196 const struct GNUNET_MessageHeader *message)
1198 const struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage *em;
1199 struct ExchangeHandle *xchange_handle;
1204 size = ntohs (message->size);
1205 if (size <= sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage))
1208 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1211 em = (const struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage *) message;
1212 ticket = (const char *) &em[1];
1213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1214 "Received EXCHANGE of `%s' from client\n",
1216 xchange_handle = GNUNET_malloc (sizeof (struct ExchangeHandle));
1217 xchange_handle->aud_privkey = em->aud_privkey;
1219 if (GNUNET_SYSERR == ticket_parse (ticket,
1220 &xchange_handle->aud_privkey,
1221 &xchange_handle->ticket))
1223 GNUNET_free (xchange_handle);
1224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1227 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Looking for token under %s\n",
1228 xchange_handle->ticket->payload->label);
1229 GNUNET_asprintf (&lookup_query,
1231 xchange_handle->ticket->payload->label);
1232 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1233 GNUNET_SERVER_notification_context_add (nc, client);
1234 GNUNET_SERVER_client_set_user_context (client, xchange_handle);
1235 xchange_handle->client = client;
1236 xchange_handle->lookup_request = GNUNET_GNS_lookup (gns_handle,
1238 &xchange_handle->ticket->payload->identity_key,
1239 GNUNET_GNSRECORD_TYPE_ID_TOKEN,
1240 GNUNET_GNS_LO_LOCAL_MASTER,
1242 &process_lookup_result,
1244 GNUNET_free (lookup_query);
1251 * Look for existing token
1253 * @param cls the identity entry
1254 * @param zone the identity
1255 * @param lbl the name of the record
1256 * @param rd_count number of records
1257 * @param rd record data
1261 find_existing_token (void *cls,
1262 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
1264 unsigned int rd_count,
1265 const struct GNUNET_GNSRECORD_Data *rd)
1267 struct IssueHandle *handle = cls;
1268 const struct GNUNET_GNSRECORD_Data *token_metadata_record;
1269 struct GNUNET_CRYPTO_EcdsaPublicKey *aud_key;
1270 struct GNUNET_HashCode key;
1271 int scope_count_token;
1279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1280 ">>> No existing token found\n");
1283 GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1285 GNUNET_STRINGS_base64_encode ((char*)&rnd_key,
1288 handle->ns_it = NULL;
1289 handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1296 //There should be only a single record for a token under a label
1299 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1303 if (rd[0].record_type == GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
1305 token_metadata_record = &rd[0];
1307 token_metadata_record = &rd[1];
1309 if (token_metadata_record->record_type != GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA)
1311 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1314 ecdhe_privkey = *((struct GNUNET_CRYPTO_EcdhePrivateKey *)token_metadata_record->data);
1316 (struct GNUNET_CRYPTO_EcdsaPublicKey *)(token_metadata_record->data+sizeof(struct GNUNET_CRYPTO_EcdhePrivateKey));
1317 tmp_scopes = GNUNET_strdup ((char*) aud_key+sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1319 if (0 != memcmp (aud_key, &handle->aud_key,
1320 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)))
1322 char *tmp2 = GNUNET_STRINGS_data_to_string_alloc (aud_key,
1323 sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey));
1324 //Audience does not match!
1325 char *tmp = GNUNET_GNSRECORD_value_to_string (GNUNET_GNSRECORD_TYPE_ID_TOKEN_METADATA,
1326 token_metadata_record->data,
1327 token_metadata_record->data_size);
1328 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1329 "Token does not match audience %s vs %s. Moving on\n",
1332 GNUNET_free (tmp_scopes);
1333 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1337 scope = strtok (tmp_scopes, ",");
1338 scope_count_token = 0;
1339 while (NULL != scope)
1341 GNUNET_CRYPTO_hash (scope,
1345 if ((NULL != handle->attr_map) &&
1346 (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->attr_map, &key)))
1348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1349 "Issued token does not include `%s'. Moving on\n", scope);
1350 GNUNET_free (tmp_scopes);
1351 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1354 scope_count_token++;
1355 scope = strtok (NULL, ",");
1357 GNUNET_free (tmp_scopes);
1358 //All scopes in token are also in request. Now
1360 if (GNUNET_CONTAINER_multihashmap_size (handle->attr_map) == scope_count_token)
1362 //We have an existing token
1363 handle->label = GNUNET_strdup (lbl);
1364 handle->ns_it = NULL;
1365 handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1372 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1373 "Nuber of attributes in token do not match request\n");
1375 GNUNET_NAMESTORE_zone_iterator_next (handle->ns_it);
1381 * Handler for issue message
1384 * @param client who sent the message
1385 * @param message the message
1388 handle_issue_message (void *cls,
1389 struct GNUNET_SERVER_Client *client,
1390 const struct GNUNET_MessageHeader *message)
1392 const struct GNUNET_IDENTITY_PROVIDER_IssueMessage *im;
1398 struct GNUNET_HashCode key;
1399 struct IssueHandle *issue_handle;
1401 size = ntohs (message->size);
1402 if (size <= sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueMessage))
1405 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1408 im = (const struct GNUNET_IDENTITY_PROVIDER_IssueMessage *) message;
1409 scopes = (const char *) &im[1];
1410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1411 "Received ISSUE of `%s' from client\n",
1413 issue_handle = GNUNET_malloc (sizeof (struct IssueHandle));
1414 issue_handle->attr_map = GNUNET_CONTAINER_multihashmap_create (5,
1416 scopes_tmp = GNUNET_strdup (scopes);
1417 scope = strtok(scopes_tmp, ",");
1418 for (; NULL != scope; scope = strtok (NULL, ","))
1420 GNUNET_CRYPTO_hash (scope,
1423 GNUNET_CONTAINER_multihashmap_put (issue_handle->attr_map,
1426 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1428 GNUNET_free (scopes_tmp);
1430 issue_handle->aud_key = im->aud_key;
1431 issue_handle->iss_key = im->iss_key;
1432 GNUNET_CRYPTO_ecdsa_key_get_public (&im->iss_key,
1433 &issue_handle->iss_pkey);
1434 issue_handle->expiration = GNUNET_TIME_absolute_ntoh (im->expiration);
1435 issue_handle->nonce = ntohl (im->nonce);
1436 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1437 GNUNET_SERVER_notification_context_add (nc, client);
1438 GNUNET_SERVER_client_set_user_context (client, issue_handle);
1439 issue_handle->client = client;
1440 issue_handle->scopes = GNUNET_strdup (scopes);
1441 issue_handle->token = token_create (&issue_handle->iss_pkey,
1442 &issue_handle->aud_key);
1444 issue_handle->ns_it = GNUNET_NAMESTORE_zone_iteration_start (ns_handle,
1446 &find_existing_token,
1451 * Main function that will be run
1453 * @param cls closure
1454 * @param args remaining command-line arguments
1455 * @param cfgfile name of the configuration file used (for saving, can be NULL)
1456 * @param c configuration
1460 struct GNUNET_SERVER_Handle *server,
1461 const struct GNUNET_CONFIGURATION_Handle *c)
1463 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1464 {&handle_issue_message, NULL,
1465 GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE, 0},
1466 {&handle_exchange_message, NULL,
1467 GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE, 0},
1473 stats = GNUNET_STATISTICS_create ("identity-provider", cfg);
1474 GNUNET_SERVER_add_handlers (server, handlers);
1475 nc = GNUNET_SERVER_notification_context_create (server, 1);
1477 //Connect to identity and namestore services
1478 ns_handle = GNUNET_NAMESTORE_connect (cfg);
1479 if (NULL == ns_handle)
1481 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "error connecting to namestore");
1484 gns_handle = GNUNET_GNS_connect (cfg);
1485 if (NULL == gns_handle)
1487 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "error connecting to gns");
1490 identity_handle = GNUNET_IDENTITY_connect (cfg,
1495 GNUNET_CONFIGURATION_get_value_time (cfg,
1496 "identity-provider",
1497 "TOKEN_EXPIRATION_INTERVAL",
1498 &token_expiration_interval))
1500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1501 "Time window for zone iteration: %s\n",
1502 GNUNET_STRINGS_relative_time_to_string (token_expiration_interval,
1505 token_expiration_interval = DEFAULT_TOKEN_EXPIRATION_INTERVAL;
1508 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1509 &do_shutdown, NULL);
1517 * @param argc number of arguments from the cli
1518 * @param argv command line arguments
1519 * @return 0 ok, 1 on error
1523 main (int argc, char *const *argv)
1525 return (GNUNET_OK ==
1526 GNUNET_SERVICE_run (argc, argv, "identity-provider",
1527 GNUNET_SERVICE_OPTION_NONE,
1528 &run, NULL)) ? 0 : 1;
1531 /* end of gnunet-rest-server.c */