2 This file is part of GNUnet.
3 Copyright (C) 2012-2018 GNUnet e.V.
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.
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.
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/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
21 * @author Martin Schanzenbach
22 * @author Philippe Buschmann
23 * @file identity/plugin_rest_openid_connect.c
24 * @brief GNUnet Namestore REST plugin
31 #include "gnunet_gns_service.h"
32 #include "gnunet_gnsrecord_lib.h"
33 #include "gnunet_identity_service.h"
34 #include "gnunet_namestore_service.h"
35 #include "gnunet_reclaim_lib.h"
36 #include "gnunet_reclaim_service.h"
37 #include "gnunet_rest_lib.h"
38 #include "gnunet_rest_plugin.h"
39 #include "gnunet_signatures.h"
40 #include "microhttpd.h"
41 #include "oidc_helper.h"
45 #define GNUNET_REST_API_NS_OIDC "/openid"
50 #define GNUNET_REST_API_NS_AUTHORIZE "/openid/authorize"
55 #define GNUNET_REST_API_NS_TOKEN "/openid/token"
60 #define GNUNET_REST_API_NS_USERINFO "/openid/userinfo"
65 #define GNUNET_REST_API_NS_LOGIN "/openid/login"
68 * State while collecting all egos
70 #define ID_REST_STATE_INIT 0
73 * Done collecting egos
75 #define ID_REST_STATE_POST_INIT 1
80 #define OIDC_GRANT_TYPE_KEY "grant_type"
85 #define OIDC_GRANT_TYPE_VALUE "authorization_code"
90 #define OIDC_CODE_KEY "code"
93 * OIDC response_type key
95 #define OIDC_RESPONSE_TYPE_KEY "response_type"
100 #define OIDC_CLIENT_ID_KEY "client_id"
105 #define OIDC_SCOPE_KEY "scope"
108 * OIDC redirect_uri key
110 #define OIDC_REDIRECT_URI_KEY "redirect_uri"
115 #define OIDC_STATE_KEY "state"
120 #define OIDC_NONCE_KEY "nonce"
125 #define OIDC_CLAIMS_KEY "claims"
128 * OIDC PKCE code challenge
130 #define OIDC_CODE_CHALLENGE_KEY "code_challenge"
133 * OIDC PKCE code verifier
135 #define OIDC_CODE_VERIFIER_KEY "code_verifier"
138 * OIDC cookie expiration (in seconds)
140 #define OIDC_COOKIE_EXPIRATION 3
143 * OIDC cookie header key
145 #define OIDC_COOKIE_HEADER_KEY "cookie"
148 * OIDC cookie header information key
150 #define OIDC_AUTHORIZATION_HEADER_KEY "authorization"
153 * OIDC cookie header information key
155 #define OIDC_COOKIE_HEADER_INFORMATION_KEY "Identity="
158 * OIDC cookie header if user cancelled
160 #define OIDC_COOKIE_HEADER_ACCESS_DENIED "Identity=Denied"
163 * OIDC expected response_type while authorizing
165 #define OIDC_EXPECTED_AUTHORIZATION_RESPONSE_TYPE "code"
168 * OIDC expected scope part while authorizing
170 #define OIDC_EXPECTED_AUTHORIZATION_SCOPE "openid"
173 * OIDC error key for invalid client
175 #define OIDC_ERROR_KEY_INVALID_CLIENT "invalid_client"
178 * OIDC error key for invalid scopes
180 #define OIDC_ERROR_KEY_INVALID_SCOPE "invalid_scope"
183 * OIDC error key for invalid requests
185 #define OIDC_ERROR_KEY_INVALID_REQUEST "invalid_request"
188 * OIDC error key for invalid tokens
190 #define OIDC_ERROR_KEY_INVALID_TOKEN "invalid_token"
193 * OIDC error key for invalid cookies
195 #define OIDC_ERROR_KEY_INVALID_COOKIE "invalid_cookie"
198 * OIDC error key for generic server errors
200 #define OIDC_ERROR_KEY_SERVER_ERROR "server_error"
203 * OIDC error key for unsupported grants
205 #define OIDC_ERROR_KEY_UNSUPPORTED_GRANT_TYPE "unsupported_grant_type"
208 * OIDC error key for unsupported response types
210 #define OIDC_ERROR_KEY_UNSUPPORTED_RESPONSE_TYPE "unsupported_response_type"
213 * OIDC error key for unauthorized clients
215 #define OIDC_ERROR_KEY_UNAUTHORIZED_CLIENT "unauthorized_client"
218 * OIDC error key for denied access
220 #define OIDC_ERROR_KEY_ACCESS_DENIED "access_denied"
224 * OIDC ignored parameter array
226 static char *OIDC_ignored_parameter_array[] = { "display",
235 * OIDC Hash map that keeps track of issued cookies
237 struct GNUNET_CONTAINER_MultiHashMap *OIDC_cookie_jar_map;
240 * Hash map that links the issued access token to the corresponding ticket and
243 struct GNUNET_CONTAINER_MultiHashMap *OIDC_access_token_map;
246 * The configuration handle
248 const struct GNUNET_CONFIGURATION_Handle *cfg;
251 * HTTP methods allows for this plugin
253 static char *allow_methods;
256 * @brief struct returned by the initialization function of the plugin
260 const struct GNUNET_CONFIGURATION_Handle *cfg;
264 * OIDC needed variables
266 struct OIDC_Variables
269 * The RP client public key
271 struct GNUNET_CRYPTO_EcdsaPublicKey client_pkey;
274 * The OIDC client id of the RP
279 * The OIDC redirect uri
284 * The list of oidc scopes
304 * The OIDC response type
309 * The identity chosen by the user to login
311 char *login_identity;
314 * User cancelled authorization/login
319 * The PKCE code_challenge
321 char *code_challenge;
324 * The PKCE code_verifier
342 struct EgoEntry *next;
347 struct EgoEntry *prev;
362 struct GNUNET_IDENTITY_Ego *ego;
371 struct EgoEntry *ego_head;
376 struct EgoEntry *ego_tail;
381 struct EgoEntry *ego_entry;
384 * Pointer to ego private key
386 struct GNUNET_CRYPTO_EcdsaPrivateKey priv_key;
391 struct OIDC_Variables *oidc;
394 * The processing state
399 * Handle to Identity service.
401 struct GNUNET_IDENTITY_Handle *identity_handle;
406 struct GNUNET_REST_RequestHandle *rest_handle;
411 struct GNUNET_GNS_Handle *gns_handle;
416 struct GNUNET_GNS_LookupRequest *gns_op;
419 * Handle to NAMESTORE
421 struct GNUNET_NAMESTORE_Handle *namestore_handle;
424 * Iterator for NAMESTORE
426 struct GNUNET_NAMESTORE_ZoneIterator *namestore_handle_it;
429 * Attribute claim list
431 struct GNUNET_RECLAIM_AttributeList *attr_list;
436 struct GNUNET_RECLAIM_AttestationList *attests_list;
442 struct GNUNET_IDENTITY_Operation *op;
447 struct GNUNET_RECLAIM_Handle *idp;
452 struct GNUNET_RECLAIM_Operation *idp_op;
457 struct GNUNET_RECLAIM_AttributeIterator *attr_it;
460 * Attestation iterator
462 struct GNUNET_RECLAIM_AttestationIterator *attest_it;
468 struct GNUNET_RECLAIM_TicketIterator *ticket_it;
473 struct GNUNET_RECLAIM_Ticket ticket;
476 * Desired timeout for the lookup (default is no timeout).
478 struct GNUNET_TIME_Relative timeout;
481 * ID of a task associated with the resolution process.
483 struct GNUNET_SCHEDULER_Task *timeout_task;
486 * The plugin result processor
488 GNUNET_REST_ResultProcessor proc;
491 * The closure of the result processor
501 * The tld for redirect
506 * The redirect prefix
508 char *redirect_prefix;
511 * The redirect suffix
513 char *redirect_suffix;
516 * Error response message
521 * Error response description
532 * Cleanup lookup handle
533 * @param handle Handle to clean up
536 cleanup_handle (struct RequestHandle *handle)
538 struct EgoEntry *ego_entry;
539 struct EgoEntry *ego_tmp;
541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up\n");
542 if (NULL != handle->timeout_task)
543 GNUNET_SCHEDULER_cancel (handle->timeout_task);
544 if (NULL != handle->identity_handle)
545 GNUNET_IDENTITY_disconnect (handle->identity_handle);
546 if (NULL != handle->attr_it)
547 GNUNET_RECLAIM_get_attributes_stop (handle->attr_it);
548 if (NULL != handle->attest_it)
549 GNUNET_RECLAIM_get_attestations_stop (handle->attest_it);
550 if (NULL != handle->ticket_it)
551 GNUNET_RECLAIM_ticket_iteration_stop (handle->ticket_it);
552 if (NULL != handle->idp)
553 GNUNET_RECLAIM_disconnect (handle->idp);
554 GNUNET_free_non_null (handle->url);
555 GNUNET_free_non_null (handle->tld);
556 GNUNET_free_non_null (handle->redirect_prefix);
557 GNUNET_free_non_null (handle->redirect_suffix);
558 GNUNET_free_non_null (handle->emsg);
559 GNUNET_free_non_null (handle->edesc);
560 if (NULL != handle->gns_op)
561 GNUNET_GNS_lookup_cancel (handle->gns_op);
562 if (NULL != handle->gns_handle)
563 GNUNET_GNS_disconnect (handle->gns_handle);
565 if (NULL != handle->namestore_handle)
566 GNUNET_NAMESTORE_disconnect (handle->namestore_handle);
567 if (NULL != handle->oidc)
569 GNUNET_free_non_null (handle->oidc->client_id);
570 GNUNET_free_non_null (handle->oidc->login_identity);
571 GNUNET_free_non_null (handle->oidc->nonce);
572 GNUNET_free_non_null (handle->oidc->redirect_uri);
573 GNUNET_free_non_null (handle->oidc->response_type);
574 GNUNET_free_non_null (handle->oidc->scope);
575 GNUNET_free_non_null (handle->oidc->state);
576 json_decref (handle->oidc->response);
577 GNUNET_free (handle->oidc);
579 GNUNET_RECLAIM_attribute_list_destroy (handle->attr_list);
580 GNUNET_RECLAIM_attestation_list_destroy (handle->attests_list);
582 for (ego_entry = handle->ego_head; NULL != ego_entry;)
585 ego_entry = ego_entry->next;
586 GNUNET_free (ego_tmp->identifier);
587 GNUNET_free (ego_tmp->keystring);
588 GNUNET_free (ego_tmp);
590 GNUNET_free (handle);
595 cleanup_handle_delayed (void *cls)
597 cleanup_handle (cls);
602 * Task run on error, sends error message. Cleans up everything.
604 * @param cls the `struct RequestHandle`
609 struct RequestHandle *handle = cls;
610 struct MHD_Response *resp;
613 GNUNET_asprintf (&json_error,
614 "{ \"error\" : \"%s\", \"error_description\" : \"%s\"%s%s%s}",
616 (NULL != handle->edesc) ? handle->edesc : "",
617 (NULL != handle->oidc->state) ? ", \"state\":\"" : "",
618 (NULL != handle->oidc->state) ? handle->oidc->state : "",
619 (NULL != handle->oidc->state) ? "\"" : "");
620 if (0 == handle->response_code)
621 handle->response_code = MHD_HTTP_BAD_REQUEST;
622 resp = GNUNET_REST_create_response (json_error);
623 if (MHD_HTTP_UNAUTHORIZED == handle->response_code)
624 MHD_add_response_header (resp, MHD_HTTP_HEADER_WWW_AUTHENTICATE, "Basic");
625 MHD_add_response_header (resp,
626 MHD_HTTP_HEADER_CONTENT_TYPE,
628 handle->proc (handle->proc_cls, resp, handle->response_code);
629 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
630 GNUNET_free (json_error);
635 * Task run on error in userinfo endpoint, sends error header. Cleans up
638 * @param cls the `struct RequestHandle`
641 do_userinfo_error (void *cls)
643 struct RequestHandle *handle = cls;
644 struct MHD_Response *resp;
647 GNUNET_asprintf (&error,
648 "error=\"%s\", error_description=\"%s\"",
650 (NULL != handle->edesc) ? handle->edesc : "");
651 resp = GNUNET_REST_create_response ("");
652 MHD_add_response_header (resp, MHD_HTTP_HEADER_WWW_AUTHENTICATE, "Bearer");
653 handle->proc (handle->proc_cls, resp, handle->response_code);
654 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
660 * Task run on error, sends error message and redirects. Cleans up everything.
662 * @param cls the `struct RequestHandle`
665 do_redirect_error (void *cls)
667 struct RequestHandle *handle = cls;
668 struct MHD_Response *resp;
671 GNUNET_asprintf (&redirect,
672 "%s?error=%s&error_description=%s%s%s",
673 handle->oidc->redirect_uri,
676 (NULL != handle->oidc->state) ? "&state=" : "",
677 (NULL != handle->oidc->state) ? handle->oidc->state : "");
678 resp = GNUNET_REST_create_response ("");
679 MHD_add_response_header (resp, "Location", redirect);
680 handle->proc (handle->proc_cls, resp, MHD_HTTP_FOUND);
681 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
682 GNUNET_free (redirect);
687 * Task run on timeout, sends error message. Cleans up everything.
689 * @param cls the `struct RequestHandle`
692 do_timeout (void *cls)
694 struct RequestHandle *handle = cls;
696 handle->timeout_task = NULL;
702 * Return attributes for claim
704 * @param cls the request handle
707 return_userinfo_response (void *cls)
710 struct RequestHandle *handle = cls;
711 struct MHD_Response *resp;
713 result_str = json_dumps (handle->oidc->response, 0);
714 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,"ID-Token: %s\n",result_str);
715 resp = GNUNET_REST_create_response (result_str);
716 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
717 GNUNET_free (result_str);
718 cleanup_handle (handle);
723 * Respond to OPTIONS request
725 * @param con_handle the connection handle
727 * @param cls the RequestHandle
730 options_cont (struct GNUNET_REST_RequestHandle *con_handle,
734 struct MHD_Response *resp;
735 struct RequestHandle *handle = cls;
737 // For now, independent of path return all options
738 resp = GNUNET_REST_create_response (NULL);
739 MHD_add_response_header (resp, "Access-Control-Allow-Methods", allow_methods);
740 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
741 cleanup_handle (handle);
747 * Interprets cookie header and pass its identity keystring to handle
750 cookie_identity_interpretation (struct RequestHandle *handle)
752 struct GNUNET_HashCode cache_key;
754 struct GNUNET_TIME_Absolute current_time, *relog_time;
755 char delimiter[] = "; ";
760 // gets identity of login try with cookie
761 GNUNET_CRYPTO_hash (OIDC_COOKIE_HEADER_KEY,
762 strlen (OIDC_COOKIE_HEADER_KEY),
764 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle
768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No cookie found\n");
771 // splits cookies and find 'Identity' cookie
773 GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->header_param_map,
775 cookies = GNUNET_strdup (tmp_cookies);
776 token = strtok (cookies, delimiter);
777 handle->oidc->user_cancelled = GNUNET_NO;
778 handle->oidc->login_identity = NULL;
781 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
782 "Unable to parse cookie: %s\n",
784 GNUNET_free (cookies);
788 while (NULL != token)
790 if (0 == strcmp (token, OIDC_COOKIE_HEADER_ACCESS_DENIED))
792 handle->oidc->user_cancelled = GNUNET_YES;
793 GNUNET_free (cookies);
796 if (NULL != strstr (token, OIDC_COOKIE_HEADER_INFORMATION_KEY))
798 token = strtok (NULL, delimiter);
802 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
803 "No cookie value to process: %s\n",
805 GNUNET_free (cookies);
808 GNUNET_CRYPTO_hash (token, strlen (token), &cache_key);
810 GNUNET_CONTAINER_multihashmap_contains (OIDC_cookie_jar_map, &cache_key))
813 GNUNET_ERROR_TYPE_WARNING,
814 "Found cookie `%s', but no corresponding expiration entry present...\n",
816 GNUNET_free (cookies);
820 GNUNET_CONTAINER_multihashmap_get (OIDC_cookie_jar_map, &cache_key);
821 current_time = GNUNET_TIME_absolute_get ();
822 // 30 min after old login -> redirect to login
823 if (current_time.abs_value_us > relog_time->abs_value_us)
825 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
826 "Found cookie `%s', but it is expired.\n",
828 GNUNET_free (cookies);
831 value = strtok (token, OIDC_COOKIE_HEADER_INFORMATION_KEY);
832 GNUNET_assert (NULL != value);
833 handle->oidc->login_identity = GNUNET_strdup (value);
834 GNUNET_free (cookies);
839 * Redirects to login page stored in configuration file
842 login_redirect (void *cls)
844 char *login_base_url;
846 struct MHD_Response *resp;
847 struct RequestHandle *handle = cls;
849 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg,
850 "reclaim-rest-plugin",
854 GNUNET_asprintf (&new_redirect,
855 "%s?%s=%s&%s=%s&%s=%s&%s=%s&%s=%s&%s=%s&%s=%s&%s=%s",
857 OIDC_RESPONSE_TYPE_KEY,
858 handle->oidc->response_type,
860 handle->oidc->client_id,
861 OIDC_REDIRECT_URI_KEY,
862 handle->oidc->redirect_uri,
866 (NULL != handle->oidc->state) ? handle->oidc->state : "",
867 OIDC_CODE_CHALLENGE_KEY,
868 (NULL != handle->oidc->code_challenge) ?
869 handle->oidc->code_challenge : "",
871 (NULL != handle->oidc->nonce) ? handle->oidc->nonce : "",
873 (NULL != handle->oidc->claims) ? handle->oidc->claims :
875 resp = GNUNET_REST_create_response ("");
876 MHD_add_response_header (resp, "Location", new_redirect);
877 GNUNET_free (login_base_url);
881 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
882 handle->edesc = GNUNET_strdup ("gnunet configuration failed");
883 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
884 GNUNET_SCHEDULER_add_now (&do_error, handle);
887 handle->proc (handle->proc_cls, resp, MHD_HTTP_FOUND);
888 GNUNET_free (new_redirect);
889 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
894 * Does internal server error when iteration failed.
897 oidc_iteration_error (void *cls)
899 struct RequestHandle *handle = cls;
901 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
902 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
903 GNUNET_SCHEDULER_add_now (&do_error, handle);
908 * Issues ticket and redirects to relying party with the authorization code as
909 * parameter. Otherwise redirects with error
912 oidc_ticket_issue_cb (void *cls, const struct GNUNET_RECLAIM_Ticket *ticket)
914 struct RequestHandle *handle = cls;
915 struct MHD_Response *resp;
920 handle->idp_op = NULL;
923 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
924 handle->edesc = GNUNET_strdup ("Server cannot generate ticket.");
925 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
928 handle->ticket = *ticket;
930 GNUNET_STRINGS_data_to_string_alloc (&handle->ticket,
931 sizeof(struct GNUNET_RECLAIM_Ticket));
932 // TODO change if more attributes are needed (see max_age)
933 code_string = OIDC_build_authz_code (&handle->priv_key,
936 handle->attests_list,
938 handle->oidc->code_challenge);
939 if ((NULL != handle->redirect_prefix) && (NULL != handle->redirect_suffix) &&
940 (NULL != handle->tld))
942 GNUNET_asprintf (&redirect_uri,
943 "%s.%s/%s?%s=%s&state=%s",
944 handle->redirect_prefix,
946 handle->redirect_suffix,
947 handle->oidc->response_type,
949 handle->oidc->state);
953 GNUNET_asprintf (&redirect_uri,
955 handle->oidc->redirect_uri,
956 handle->oidc->response_type,
958 handle->oidc->state);
960 resp = GNUNET_REST_create_response ("");
961 MHD_add_response_header (resp, "Location", redirect_uri);
962 handle->proc (handle->proc_cls, resp, MHD_HTTP_FOUND);
963 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
964 GNUNET_free (redirect_uri);
965 GNUNET_free (ticket_str);
966 GNUNET_free (code_string);
971 oidc_attest_collect_finished_cb (void *cls)
973 struct RequestHandle *handle = cls;
975 handle->attest_it = NULL;
976 handle->idp_op = GNUNET_RECLAIM_ticket_issue (handle->idp,
978 &handle->oidc->client_pkey,
980 &oidc_ticket_issue_cb,
986 * Collects all attributes for an ego if in scope parameter
989 oidc_attest_collect (void *cls,
990 const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
991 const struct GNUNET_RECLAIM_Attestation *attest,
992 const struct GNUNET_RECLAIM_AttributeList *attrs)
994 struct RequestHandle *handle = cls;
995 struct GNUNET_RECLAIM_AttributeListEntry *le;
997 for (le = handle->attr_list->list_head; NULL != le; le = le->next)
999 if (GNUNET_NO == GNUNET_RECLAIM_id_is_equal (&le->attribute->attestation,
1002 struct GNUNET_RECLAIM_AttestationListEntry *ale;
1003 ale = GNUNET_new (struct GNUNET_RECLAIM_AttestationListEntry);
1004 ale->attestation = GNUNET_RECLAIM_attestation_new (attest->name,
1008 GNUNET_CONTAINER_DLL_insert (handle->attests_list->list_head,
1009 handle->attests_list->list_tail,
1013 GNUNET_RECLAIM_get_attestations_next (handle->attest_it);
1018 oidc_attr_collect_finished_cb (void *cls)
1020 struct RequestHandle *handle = cls;
1022 handle->attr_it = NULL;
1023 handle->ticket_it = NULL;
1024 if (NULL == handle->attr_list->list_head)
1026 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_SCOPE);
1027 handle->edesc = GNUNET_strdup ("The requested scope is not available.");
1028 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1031 handle->attests_list = GNUNET_new (struct GNUNET_RECLAIM_AttestationList);
1033 GNUNET_RECLAIM_get_attestations_start (handle->idp,
1035 &oidc_iteration_error,
1037 &oidc_attest_collect,
1039 &oidc_attest_collect_finished_cb,
1042 handle->idp_op = GNUNET_RECLAIM_ticket_issue (handle->idp,
1044 &handle->oidc->client_pkey,
1046 &oidc_ticket_issue_cb,
1052 * Collects all attributes for an ego if in scope parameter
1055 oidc_attr_collect (void *cls,
1056 const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
1057 const struct GNUNET_RECLAIM_Attribute *attr)
1059 struct RequestHandle *handle = cls;
1060 struct GNUNET_RECLAIM_AttributeListEntry *le;
1061 char *scope_variables;
1062 char *scope_variable;
1063 char delimiter[] = " ";
1065 scope_variables = GNUNET_strdup (handle->oidc->scope);
1066 scope_variable = strtok (scope_variables, delimiter);
1067 while (NULL != scope_variable)
1069 if (0 == strcmp (attr->name, scope_variable))
1071 scope_variable = strtok (NULL, delimiter);
1073 if (NULL == scope_variable)
1075 GNUNET_RECLAIM_get_attributes_next (handle->attr_it);
1076 GNUNET_free (scope_variables);
1077 // We can ignore this
1080 GNUNET_free (scope_variables);
1081 le = GNUNET_new (struct GNUNET_RECLAIM_AttributeListEntry);
1082 le->attribute = GNUNET_RECLAIM_attribute_new (attr->name,
1087 le->attribute->id = attr->id;
1088 le->attribute->flag = attr->flag;
1089 le->attribute->attestation = attr->attestation;
1090 GNUNET_CONTAINER_DLL_insert (handle->attr_list->list_head,
1091 handle->attr_list->list_tail,
1093 GNUNET_RECLAIM_get_attributes_next (handle->attr_it);
1098 * Checks time and cookie and redirects accordingly
1101 code_redirect (void *cls)
1103 struct RequestHandle *handle = cls;
1104 struct GNUNET_TIME_Absolute current_time;
1105 struct GNUNET_TIME_Absolute *relog_time;
1106 struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
1107 struct GNUNET_CRYPTO_EcdsaPublicKey ego_pkey;
1108 struct GNUNET_HashCode cache_key;
1109 char *identity_cookie;
1111 GNUNET_asprintf (&identity_cookie,
1113 handle->oidc->login_identity);
1114 GNUNET_CRYPTO_hash (identity_cookie, strlen (identity_cookie), &cache_key);
1115 GNUNET_free (identity_cookie);
1116 // No login time for identity -> redirect to login
1118 GNUNET_CONTAINER_multihashmap_contains (OIDC_cookie_jar_map, &cache_key))
1121 GNUNET_CONTAINER_multihashmap_get (OIDC_cookie_jar_map, &cache_key);
1122 current_time = GNUNET_TIME_absolute_get ();
1123 // 30 min after old login -> redirect to login
1124 if (current_time.abs_value_us <= relog_time->abs_value_us)
1127 GNUNET_CRYPTO_ecdsa_public_key_from_string (handle->oidc
1134 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_COOKIE);
1136 GNUNET_strdup ("The cookie of a login identity is not valid");
1137 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1140 // iterate over egos and compare their public key
1141 for (handle->ego_entry = handle->ego_head; NULL != handle->ego_entry;
1142 handle->ego_entry = handle->ego_entry->next)
1144 GNUNET_IDENTITY_ego_get_public_key (handle->ego_entry->ego, &ego_pkey);
1145 if (0 == GNUNET_memcmp (&ego_pkey, &pubkey))
1148 *GNUNET_IDENTITY_ego_get_private_key (handle->ego_entry->ego);
1149 handle->idp = GNUNET_RECLAIM_connect (cfg);
1151 GNUNET_new (struct GNUNET_RECLAIM_AttributeList);
1153 GNUNET_RECLAIM_get_attributes_start (handle->idp,
1155 &oidc_iteration_error,
1159 &oidc_attr_collect_finished_cb,
1164 GNUNET_SCHEDULER_add_now (&login_redirect, handle);
1172 build_redirect (void *cls)
1174 struct RequestHandle *handle = cls;
1175 struct MHD_Response *resp;
1178 if (GNUNET_YES == handle->oidc->user_cancelled)
1180 if ((NULL != handle->redirect_prefix) &&
1181 (NULL != handle->redirect_suffix) && (NULL != handle->tld))
1183 GNUNET_asprintf (&redirect_uri,
1184 "%s.%s/%s?error=%s&error_description=%s&state=%s",
1185 handle->redirect_prefix,
1187 handle->redirect_suffix,
1189 "User denied access",
1190 handle->oidc->state);
1194 GNUNET_asprintf (&redirect_uri,
1195 "%s?error=%s&error_description=%s&state=%s",
1196 handle->oidc->redirect_uri,
1198 "User denied access",
1199 handle->oidc->state);
1201 resp = GNUNET_REST_create_response ("");
1202 MHD_add_response_header (resp, "Location", redirect_uri);
1203 handle->proc (handle->proc_cls, resp, MHD_HTTP_FOUND);
1204 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
1205 GNUNET_free (redirect_uri);
1208 GNUNET_SCHEDULER_add_now (&code_redirect, handle);
1213 lookup_redirect_uri_result (void *cls,
1215 const struct GNUNET_GNSRECORD_Data *rd)
1217 struct RequestHandle *handle = cls;
1221 struct GNUNET_CRYPTO_EcdsaPublicKey redirect_zone;
1223 handle->gns_op = NULL;
1226 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
1228 GNUNET_strdup ("Server cannot generate ticket, redirect uri not found.");
1229 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1232 for (int i = 0; i < rd_count; i++)
1234 if (GNUNET_GNSRECORD_TYPE_RECLAIM_OIDC_REDIRECT != rd[i].record_type)
1236 if (0 != strncmp (rd[i].data, handle->oidc->redirect_uri, rd[i].data_size))
1238 tmp = GNUNET_strndup (rd[i].data, rd[i].data_size);
1239 if (NULL == strstr (tmp, handle->oidc->client_id))
1241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1242 "Redirect uri %s does not contain client_id %s\n",
1244 handle->oidc->client_id);
1248 pos = strrchr (tmp, (unsigned char) '.');
1251 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1252 "Redirect uri %s contains client_id but is malformed\n",
1258 handle->redirect_prefix = GNUNET_strdup (tmp);
1259 tmp_key_str = pos + 1;
1260 pos = strchr (tmp_key_str, (unsigned char) '/');
1263 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1264 "Redirect uri %s contains client_id but is malformed\n",
1270 handle->redirect_suffix = GNUNET_strdup (pos + 1);
1272 GNUNET_STRINGS_string_to_data (tmp_key_str,
1273 strlen (tmp_key_str),
1275 sizeof(redirect_zone));
1277 GNUNET_SCHEDULER_add_now (&build_redirect, handle);
1281 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
1283 GNUNET_strdup ("Server cannot generate ticket, redirect uri not found.");
1284 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1289 * Initiate redirect back to client.
1292 client_redirect (void *cls)
1294 struct RequestHandle *handle = cls;
1296 /* Lookup client redirect uri to verify request */
1298 GNUNET_GNS_lookup (handle->gns_handle,
1299 GNUNET_GNS_EMPTY_LABEL_AT,
1300 &handle->oidc->client_pkey,
1301 GNUNET_GNSRECORD_TYPE_RECLAIM_OIDC_REDIRECT,
1302 GNUNET_GNS_LO_DEFAULT,
1303 &lookup_redirect_uri_result,
1309 get_url_parameter_copy (const struct RequestHandle *handle, const char *key)
1311 struct GNUNET_HashCode hc;
1314 GNUNET_CRYPTO_hash (key, strlen (key), &hc);
1315 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle
1320 GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->url_param_map, &hc);
1323 return GNUNET_strdup (value);
1328 * Iteration over all results finished, build final
1331 * @param cls the `struct RequestHandle`
1334 build_authz_response (void *cls)
1336 struct RequestHandle *handle = cls;
1337 struct GNUNET_HashCode cache_key;
1339 char *expected_scope;
1340 char delimiter[] = " ";
1341 int number_of_ignored_parameter, iterator;
1344 // REQUIRED value: redirect_uri
1345 handle->oidc->redirect_uri =
1346 get_url_parameter_copy (handle, OIDC_REDIRECT_URI_KEY);
1347 if (NULL == handle->oidc->redirect_uri)
1349 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1350 handle->edesc = GNUNET_strdup ("missing parameter redirect_uri");
1351 GNUNET_SCHEDULER_add_now (&do_error, handle);
1355 // REQUIRED value: response_type
1356 handle->oidc->response_type =
1357 get_url_parameter_copy (handle, OIDC_RESPONSE_TYPE_KEY);
1358 if (NULL == handle->oidc->response_type)
1360 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1361 handle->edesc = GNUNET_strdup ("missing parameter response_type");
1362 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1366 // REQUIRED value: scope
1367 handle->oidc->scope = get_url_parameter_copy (handle, OIDC_SCOPE_KEY);
1368 if (NULL == handle->oidc->scope)
1370 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_SCOPE);
1371 handle->edesc = GNUNET_strdup ("missing parameter scope");
1372 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1376 // OPTIONAL value: nonce
1377 handle->oidc->nonce = get_url_parameter_copy (handle, OIDC_NONCE_KEY);
1379 // OPTIONAL value: claims
1380 handle->oidc->claims = get_url_parameter_copy (handle, OIDC_CLAIMS_KEY);
1382 // TODO check other values if needed
1383 number_of_ignored_parameter =
1384 sizeof(OIDC_ignored_parameter_array) / sizeof(char *);
1385 for (iterator = 0; iterator < number_of_ignored_parameter; iterator++)
1387 GNUNET_CRYPTO_hash (OIDC_ignored_parameter_array[iterator],
1388 strlen (OIDC_ignored_parameter_array[iterator]),
1391 GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle
1395 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_ACCESS_DENIED);
1396 GNUNET_asprintf (&handle->edesc,
1397 "Server will not handle parameter: %s",
1398 OIDC_ignored_parameter_array[iterator]);
1399 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1404 // We only support authorization code flows.
1405 if (0 != strcmp (handle->oidc->response_type,
1406 OIDC_EXPECTED_AUTHORIZATION_RESPONSE_TYPE))
1408 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_UNSUPPORTED_RESPONSE_TYPE);
1409 handle->edesc = GNUNET_strdup ("The authorization server does not support "
1410 "obtaining this authorization code.");
1411 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1415 // Checks if scope contains 'openid'
1416 expected_scope = GNUNET_strdup (handle->oidc->scope);
1418 test = strtok (expected_scope, delimiter);
1419 while (NULL != test)
1421 if (0 == strcmp (OIDC_EXPECTED_AUTHORIZATION_SCOPE, expected_scope))
1423 test = strtok (NULL, delimiter);
1427 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_SCOPE);
1429 GNUNET_strdup ("The requested scope is invalid, unknown, or malformed.");
1430 GNUNET_SCHEDULER_add_now (&do_redirect_error, handle);
1431 GNUNET_free (expected_scope);
1435 GNUNET_free (expected_scope);
1436 if ((NULL == handle->oidc->login_identity) &&
1437 (GNUNET_NO == handle->oidc->user_cancelled))
1438 GNUNET_SCHEDULER_add_now (&login_redirect, handle);
1440 GNUNET_SCHEDULER_add_now (&client_redirect, handle);
1445 * Iterate over tlds in config
1448 tld_iter (void *cls, const char *section, const char *option, const char *value)
1450 struct RequestHandle *handle = cls;
1451 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
1454 GNUNET_CRYPTO_ecdsa_public_key_from_string (value, strlen (value), &pkey))
1456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Skipping non key %s\n", value);
1459 if (0 == GNUNET_memcmp (&pkey, &handle->oidc->client_pkey))
1460 handle->tld = GNUNET_strdup (option + 1);
1465 * Responds to authorization GET and url-encoded POST request
1467 * @param con_handle the connection handle
1468 * @param url the url
1469 * @param cls the RequestHandle
1472 authorize_endpoint (struct GNUNET_REST_RequestHandle *con_handle,
1476 struct RequestHandle *handle = cls;
1477 struct EgoEntry *tmp_ego;
1478 const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv_key;
1479 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
1481 cookie_identity_interpretation (handle);
1483 // RECOMMENDED value: state - REQUIRED for answers
1484 handle->oidc->state = get_url_parameter_copy (handle, OIDC_STATE_KEY);
1486 // REQUIRED value: client_id
1487 handle->oidc->client_id = get_url_parameter_copy (handle, OIDC_CLIENT_ID_KEY);
1488 if (NULL == handle->oidc->client_id)
1490 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1491 handle->edesc = GNUNET_strdup ("missing parameter client_id");
1492 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
1493 GNUNET_SCHEDULER_add_now (&do_error, handle);
1497 // OPTIONAL value: code_challenge
1498 handle->oidc->code_challenge = get_url_parameter_copy (handle,
1499 OIDC_CODE_CHALLENGE_KEY);
1500 if (NULL == handle->oidc->code_challenge)
1502 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1503 "OAuth authorization request does not contain PKCE parameters!\n");
1507 GNUNET_CRYPTO_ecdsa_public_key_from_string (handle->oidc->client_id,
1509 handle->oidc->client_id),
1510 &handle->oidc->client_pkey))
1512 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_UNAUTHORIZED_CLIENT);
1513 handle->edesc = GNUNET_strdup ("The client is not authorized to request an "
1514 "authorization code using this method.");
1515 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
1516 GNUNET_SCHEDULER_add_now (&do_error, handle);
1520 // If we know this identity, translated the corresponding TLD
1521 // TODO: We might want to have a reverse lookup functionality for TLDs?
1522 for (tmp_ego = handle->ego_head; NULL != tmp_ego; tmp_ego = tmp_ego->next)
1524 priv_key = GNUNET_IDENTITY_ego_get_private_key (tmp_ego->ego);
1525 GNUNET_CRYPTO_ecdsa_key_get_public (priv_key, &pkey);
1526 if (0 == GNUNET_memcmp (&pkey, &handle->oidc->client_pkey))
1528 handle->tld = GNUNET_strdup (tmp_ego->identifier);
1529 handle->ego_entry = handle->ego_tail;
1532 handle->oidc->scope = get_url_parameter_copy (handle, OIDC_SCOPE_KEY);
1533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Scope: %s\n",GNUNET_strdup (
1534 handle->oidc->scope));
1535 if (NULL == handle->tld)
1536 GNUNET_CONFIGURATION_iterate_section_values (cfg, "gns", tld_iter, handle);
1537 if (NULL == handle->tld)
1538 handle->tld = GNUNET_strdup (handle->oidc->client_id);
1539 GNUNET_SCHEDULER_add_now (&build_authz_response, handle);
1544 * Combines an identity with a login time and responds OK to login request
1546 * @param con_handle the connection handle
1547 * @param url the url
1548 * @param cls the RequestHandle
1551 login_cont (struct GNUNET_REST_RequestHandle *con_handle,
1555 struct MHD_Response *resp = GNUNET_REST_create_response ("");
1556 struct RequestHandle *handle = cls;
1557 struct GNUNET_HashCode cache_key;
1558 struct GNUNET_TIME_Absolute *current_time;
1559 struct GNUNET_TIME_Absolute *last_time;
1565 char term_data[handle->rest_handle->data_size + 1];
1567 term_data[handle->rest_handle->data_size] = '\0';
1568 GNUNET_memcpy (term_data,
1569 handle->rest_handle->data,
1570 handle->rest_handle->data_size);
1571 root = json_loads (term_data, JSON_DECODE_ANY, &error);
1572 identity = json_object_get (root, "identity");
1573 if (! json_is_string (identity))
1575 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1576 "Error parsing json string from %s\n",
1578 handle->proc (handle->proc_cls, resp, MHD_HTTP_BAD_REQUEST);
1580 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
1583 GNUNET_asprintf (&cookie, "Identity=%s", json_string_value (identity));
1584 GNUNET_asprintf (&header_val,
1587 OIDC_COOKIE_EXPIRATION);
1588 MHD_add_response_header (resp, "Set-Cookie", header_val);
1589 MHD_add_response_header (resp, "Access-Control-Allow-Methods", "POST");
1590 GNUNET_CRYPTO_hash (cookie, strlen (cookie), &cache_key);
1592 if (0 != strcmp (json_string_value (identity), "Denied"))
1594 current_time = GNUNET_new (struct GNUNET_TIME_Absolute);
1595 *current_time = GNUNET_TIME_relative_to_absolute (
1596 GNUNET_TIME_relative_multiply (GNUNET_TIME_relative_get_second_ (),
1597 OIDC_COOKIE_EXPIRATION));
1599 GNUNET_CONTAINER_multihashmap_get (OIDC_cookie_jar_map, &cache_key);
1600 GNUNET_free_non_null (last_time);
1601 GNUNET_CONTAINER_multihashmap_put (OIDC_cookie_jar_map,
1604 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1606 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
1607 GNUNET_free (cookie);
1608 GNUNET_free (header_val);
1610 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
1615 check_authorization (struct RequestHandle *handle,
1616 struct GNUNET_CRYPTO_EcdsaPublicKey *cid)
1618 struct GNUNET_HashCode cache_key;
1619 char *authorization;
1621 char *basic_authorization;
1624 char *expected_pass;
1626 GNUNET_CRYPTO_hash (OIDC_AUTHORIZATION_HEADER_KEY,
1627 strlen (OIDC_AUTHORIZATION_HEADER_KEY),
1629 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle
1633 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1634 handle->edesc = GNUNET_strdup ("missing authorization");
1635 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1636 return GNUNET_SYSERR;
1639 GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->header_param_map,
1642 // split header in "Basic" and [content]
1643 credentials = strtok (authorization, " ");
1644 if ((NULL == credentials) || (0 != strcmp ("Basic", credentials)))
1646 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1647 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1648 return GNUNET_SYSERR;
1650 credentials = strtok (NULL, " ");
1651 if (NULL == credentials)
1653 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1654 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1655 return GNUNET_SYSERR;
1657 GNUNET_STRINGS_base64_decode (credentials,
1658 strlen (credentials),
1659 (void **) &basic_authorization);
1661 if (NULL == basic_authorization)
1663 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1664 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1665 return GNUNET_SYSERR;
1667 client_id = strtok (basic_authorization, ":");
1668 if (NULL == client_id)
1670 GNUNET_free_non_null (basic_authorization);
1671 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1672 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1673 return GNUNET_SYSERR;
1675 pass = strtok (NULL, ":");
1678 GNUNET_free_non_null (basic_authorization);
1679 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1680 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1681 return GNUNET_SYSERR;
1684 // check client password
1685 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg,
1686 "reclaim-rest-plugin",
1687 "OIDC_CLIENT_SECRET",
1690 if (0 != strcmp (expected_pass, pass))
1692 GNUNET_free_non_null (basic_authorization);
1693 GNUNET_free (expected_pass);
1694 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1695 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1696 return GNUNET_SYSERR;
1698 GNUNET_free (expected_pass);
1702 GNUNET_free_non_null (basic_authorization);
1703 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
1704 handle->edesc = GNUNET_strdup ("gnunet configuration failed");
1705 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
1706 return GNUNET_SYSERR;
1710 for (handle->ego_entry = handle->ego_head; NULL != handle->ego_entry;
1711 handle->ego_entry = handle->ego_entry->next)
1713 if (0 == strcmp (handle->ego_entry->keystring, client_id))
1716 if (NULL == handle->ego_entry)
1718 GNUNET_free_non_null (basic_authorization);
1719 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_CLIENT);
1720 handle->response_code = MHD_HTTP_UNAUTHORIZED;
1721 return GNUNET_SYSERR;
1723 GNUNET_STRINGS_string_to_data (client_id,
1726 sizeof(struct GNUNET_CRYPTO_EcdsaPublicKey));
1728 GNUNET_free (basic_authorization);
1733 const struct EgoEntry *
1734 find_ego (struct RequestHandle *handle,
1735 struct GNUNET_CRYPTO_EcdsaPublicKey *test_key)
1737 struct EgoEntry *ego_entry;
1738 struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
1740 for (ego_entry = handle->ego_head; NULL != ego_entry;
1741 ego_entry = ego_entry->next)
1743 GNUNET_IDENTITY_ego_get_public_key (ego_entry->ego, &pub_key);
1744 if (0 == GNUNET_memcmp (&pub_key, test_key))
1752 persist_access_token (const struct RequestHandle *handle,
1753 const char *access_token,
1754 const struct GNUNET_RECLAIM_Ticket *ticket)
1756 struct GNUNET_HashCode hc;
1757 struct GNUNET_RECLAIM_Ticket *ticketbuf;
1759 GNUNET_CRYPTO_hash (access_token, strlen (access_token), &hc);
1760 ticketbuf = GNUNET_new (struct GNUNET_RECLAIM_Ticket);
1761 *ticketbuf = *ticket;
1762 GNUNET_assert (GNUNET_SYSERR !=
1763 GNUNET_CONTAINER_multihashmap_put (
1764 OIDC_access_token_map,
1767 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1772 * Responds to token url-encoded POST request
1774 * @param con_handle the connection handle
1775 * @param url the url
1776 * @param cls the RequestHandle
1779 token_endpoint (struct GNUNET_REST_RequestHandle *con_handle,
1783 struct RequestHandle *handle = cls;
1784 const struct EgoEntry *ego_entry;
1785 struct GNUNET_TIME_Relative expiration_time;
1786 struct GNUNET_RECLAIM_AttributeList *cl;
1787 struct GNUNET_RECLAIM_AttestationList *al;
1788 struct GNUNET_RECLAIM_Ticket ticket;
1789 struct GNUNET_CRYPTO_EcdsaPublicKey cid;
1790 const struct GNUNET_CRYPTO_EcdsaPrivateKey *privkey;
1791 struct GNUNET_HashCode cache_key;
1792 struct MHD_Response *resp;
1795 char *json_response;
1800 char *code_verifier;
1803 * Check Authorization
1805 if (GNUNET_SYSERR == check_authorization (handle, &cid))
1807 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1808 "OIDC authorization for token endpoint failed\n");
1809 GNUNET_SCHEDULER_add_now (&do_error, handle);
1817 // TODO Do not allow multiple equal parameter names
1818 // REQUIRED grant_type
1819 GNUNET_CRYPTO_hash (OIDC_GRANT_TYPE_KEY,
1820 strlen (OIDC_GRANT_TYPE_KEY),
1822 grant_type = get_url_parameter_copy (handle, OIDC_GRANT_TYPE_KEY);
1823 if (NULL == grant_type)
1825 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1826 handle->edesc = GNUNET_strdup ("missing parameter grant_type");
1827 handle->response_code = MHD_HTTP_BAD_REQUEST;
1828 GNUNET_SCHEDULER_add_now (&do_error, handle);
1832 // Check parameter grant_type == "authorization_code"
1833 if (0 != strcmp (OIDC_GRANT_TYPE_VALUE, grant_type))
1835 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_UNSUPPORTED_GRANT_TYPE);
1836 handle->response_code = MHD_HTTP_BAD_REQUEST;
1837 GNUNET_free (grant_type);
1838 GNUNET_SCHEDULER_add_now (&do_error, handle);
1841 GNUNET_free (grant_type);
1843 code = get_url_parameter_copy (handle, OIDC_CODE_KEY);
1846 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1847 handle->edesc = GNUNET_strdup ("missing parameter code");
1848 handle->response_code = MHD_HTTP_BAD_REQUEST;
1849 GNUNET_SCHEDULER_add_now (&do_error, handle);
1852 ego_entry = find_ego (handle, &cid);
1853 if (NULL == ego_entry)
1855 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1856 handle->edesc = GNUNET_strdup ("Unknown client");
1857 handle->response_code = MHD_HTTP_BAD_REQUEST;
1859 GNUNET_SCHEDULER_add_now (&do_error, handle);
1862 privkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
1864 // REQUIRED code verifier
1865 code_verifier = get_url_parameter_copy (handle, OIDC_CODE_VERIFIER_KEY);
1866 if (NULL == code_verifier)
1868 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1869 "OAuth authorization request does not contain PKCE parameters!\n");
1874 if (GNUNET_OK != OIDC_parse_authz_code (privkey, code, code_verifier, &ticket,
1877 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1878 handle->edesc = GNUNET_strdup ("invalid code");
1879 handle->response_code = MHD_HTTP_BAD_REQUEST;
1881 GNUNET_SCHEDULER_add_now (&do_error, handle);
1887 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg,
1888 "reclaim-rest-plugin",
1892 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_SERVER_ERROR);
1893 handle->edesc = GNUNET_strdup ("gnunet configuration failed");
1894 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
1895 GNUNET_SCHEDULER_add_now (&do_error, handle);
1900 // TODO OPTIONAL acr,amr,azp
1901 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
1902 "reclaim-rest-plugin",
1906 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_REQUEST);
1907 handle->edesc = GNUNET_strdup ("No signing secret configured!");
1908 handle->response_code = MHD_HTTP_INTERNAL_SERVER_ERROR;
1909 GNUNET_SCHEDULER_add_now (&do_error, handle);
1912 id_token = OIDC_id_token_new (&ticket.audience,
1917 (NULL != nonce) ? nonce : NULL,
1919 access_token = OIDC_access_token_new ();
1920 OIDC_build_token_response (access_token,
1925 persist_access_token (handle, access_token, &ticket);
1926 resp = GNUNET_REST_create_response (json_response);
1927 MHD_add_response_header (resp, "Cache-Control", "no-store");
1928 MHD_add_response_header (resp, "Pragma", "no-cache");
1929 MHD_add_response_header (resp, "Content-Type", "application/json");
1930 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
1931 GNUNET_RECLAIM_attribute_list_destroy (cl);
1932 GNUNET_RECLAIM_attestation_list_destroy (al);
1933 GNUNET_free (access_token);
1934 GNUNET_free (json_response);
1935 GNUNET_free (id_token);
1936 GNUNET_SCHEDULER_add_now (&cleanup_handle_delayed, handle);
1941 * Collects claims and stores them in handle
1944 consume_ticket (void *cls,
1945 const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
1946 const struct GNUNET_RECLAIM_Attribute *attr,
1947 const struct GNUNET_RECLAIM_Attestation *attest)
1949 struct RequestHandle *handle = cls;
1950 if (NULL == identity)
1952 GNUNET_SCHEDULER_add_now (&return_userinfo_response, handle);
1955 if (GNUNET_YES == GNUNET_RECLAIM_id_is_zero (&attr->attestation))
1959 tmp_value = GNUNET_RECLAIM_attribute_value_to_string (attr->type,
1962 value = json_string (tmp_value);
1963 json_object_set_new (handle->oidc->response, attr->name, value);
1964 GNUNET_free (tmp_value);
1967 json_t *claim_sources;
1968 json_t *claim_sources_jwt;
1969 json_t *claim_names;
1970 char *attest_val_str;
1971 claim_sources = json_object_get (handle->oidc->response,"_claim_sources");
1972 claim_names = json_object_get (handle->oidc->response,"_claim_names");
1974 GNUNET_RECLAIM_attestation_value_to_string (attest->type,
1977 if ((NULL == claim_sources) && (NULL == claim_names) )
1979 claim_sources = json_object ();
1980 claim_names = json_object ();
1984 GNUNET_asprintf (&source_name, "src%d", i);
1985 while (NULL != (claim_sources_jwt = json_object_get (claim_sources,
1988 if (0 == strcmp (json_string_value (json_object_get (claim_sources_jwt,
1992 // Adapt only the claim names
1993 json_object_set_new (claim_names, attr->data,
1994 json_string (source_name));
1995 json_object_set (handle->oidc->response,
1996 "_claim_names", claim_names);
2000 GNUNET_free (source_name);
2001 GNUNET_asprintf (&source_name, "src%d", i);
2005 if (NULL == claim_sources_jwt)
2007 claim_sources_jwt = json_object ();
2008 // Set the JWT for names
2009 json_object_set_new (claim_names, attr->data,
2010 json_string (source_name));
2011 // Set the JWT for the inner source
2012 json_object_set_new (claim_sources_jwt, "JWT",
2013 json_string (attest_val_str));
2014 // Set the JWT for the source
2015 json_object_set_new (claim_sources, source_name, claim_sources_jwt);
2017 json_object_set (handle->oidc->response, "_claim_names", claim_names);
2018 json_object_set (handle->oidc->response, "_claim_sources",claim_sources);
2021 json_decref (claim_sources);
2022 json_decref (claim_names);
2023 json_decref (claim_sources_jwt);
2024 GNUNET_free (attest_val_str);
2029 * Responds to userinfo GET and url-encoded POST request
2031 * @param con_handle the connection handle
2032 * @param url the url
2033 * @param cls the RequestHandle
2036 userinfo_endpoint (struct GNUNET_REST_RequestHandle *con_handle,
2040 // TODO expiration time
2041 struct RequestHandle *handle = cls;
2042 char delimiter[] = " ";
2043 struct GNUNET_HashCode cache_key;
2044 char *authorization;
2045 char *authorization_type;
2046 char *authorization_access_token;
2047 struct GNUNET_RECLAIM_Ticket *ticket;
2048 const struct EgoEntry *ego_entry;
2049 const struct GNUNET_CRYPTO_EcdsaPrivateKey *privkey;
2051 GNUNET_CRYPTO_hash (OIDC_AUTHORIZATION_HEADER_KEY,
2052 strlen (OIDC_AUTHORIZATION_HEADER_KEY),
2054 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_contains (handle->rest_handle
2058 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_TOKEN);
2059 handle->edesc = GNUNET_strdup ("No Access Token");
2060 handle->response_code = MHD_HTTP_UNAUTHORIZED;
2061 GNUNET_SCHEDULER_add_now (&do_userinfo_error, handle);
2065 GNUNET_CONTAINER_multihashmap_get (handle->rest_handle->header_param_map,
2068 // split header in "Bearer" and access_token
2069 authorization = GNUNET_strdup (authorization);
2070 authorization_type = strtok (authorization, delimiter);
2071 if ((NULL == authorization_type) ||
2072 (0 != strcmp ("Bearer", authorization_type)))
2074 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_TOKEN);
2075 handle->edesc = GNUNET_strdup ("No Access Token");
2076 handle->response_code = MHD_HTTP_UNAUTHORIZED;
2077 GNUNET_SCHEDULER_add_now (&do_userinfo_error, handle);
2078 GNUNET_free (authorization);
2081 authorization_access_token = strtok (NULL, delimiter);
2082 if (NULL == authorization_access_token)
2084 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_TOKEN);
2085 handle->edesc = GNUNET_strdup ("Access token missing");
2086 handle->response_code = MHD_HTTP_UNAUTHORIZED;
2087 GNUNET_SCHEDULER_add_now (&do_userinfo_error, handle);
2088 GNUNET_free (authorization);
2092 GNUNET_CRYPTO_hash (authorization_access_token,
2093 strlen (authorization_access_token),
2096 GNUNET_CONTAINER_multihashmap_contains (OIDC_access_token_map,
2099 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_TOKEN);
2100 handle->edesc = GNUNET_strdup ("The access token expired");
2101 handle->response_code = MHD_HTTP_UNAUTHORIZED;
2102 GNUNET_SCHEDULER_add_now (&do_userinfo_error, handle);
2103 GNUNET_free (authorization);
2107 GNUNET_CONTAINER_multihashmap_get (OIDC_access_token_map, &cache_key);
2108 GNUNET_assert (NULL != ticket);
2109 ego_entry = find_ego (handle, &ticket->audience);
2110 if (NULL == ego_entry)
2112 handle->emsg = GNUNET_strdup (OIDC_ERROR_KEY_INVALID_TOKEN);
2113 handle->edesc = GNUNET_strdup ("The access token expired");
2114 handle->response_code = MHD_HTTP_UNAUTHORIZED;
2115 GNUNET_SCHEDULER_add_now (&do_userinfo_error, handle);
2116 GNUNET_free (authorization);
2120 handle->idp = GNUNET_RECLAIM_connect (cfg);
2121 handle->oidc->response = json_object ();
2122 json_object_set_new (handle->oidc->response,
2124 json_string (ego_entry->keystring));
2125 privkey = GNUNET_IDENTITY_ego_get_private_key (ego_entry->ego);
2126 handle->idp_op = GNUNET_RECLAIM_ticket_consume (handle->idp,
2131 GNUNET_free (authorization);
2136 * Handle rest request
2138 * @param handle the request handle
2141 init_cont (struct RequestHandle *handle)
2143 struct GNUNET_REST_RequestHandlerError err;
2144 static const struct GNUNET_REST_RequestHandler handlers[] =
2145 { { MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_AUTHORIZE, &authorize_endpoint },
2146 { MHD_HTTP_METHOD_POST,
2147 GNUNET_REST_API_NS_AUTHORIZE,
2148 &authorize_endpoint }, // url-encoded
2149 { MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_LOGIN, &login_cont },
2150 { MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_TOKEN, &token_endpoint },
2151 { MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_USERINFO, &userinfo_endpoint },
2152 { MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_USERINFO, &userinfo_endpoint },
2153 { MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_OIDC, &options_cont },
2154 GNUNET_REST_HANDLER_END };
2157 GNUNET_REST_handle_request (handle->rest_handle, handlers, &err, handle))
2159 handle->response_code = err.error_code;
2160 GNUNET_SCHEDULER_add_now (&do_error, handle);
2166 * If listing is enabled, prints information about the egos.
2168 * This function is initially called for all egos and then again
2169 * whenever a ego's identifier changes or if it is deleted. At the
2170 * end of the initial pass over all egos, the function is once called
2171 * with 'NULL' for 'ego'. That does NOT mean that the callback won't
2172 * be invoked in the future or that there was an error.
2174 * When used with 'GNUNET_IDENTITY_create' or 'GNUNET_IDENTITY_get',
2175 * this function is only called ONCE, and 'NULL' being passed in
2176 * 'ego' does indicate an error (i.e. name is taken or no default
2177 * value is known). If 'ego' is non-NULL and if '*ctx'
2178 * is set in those callbacks, the value WILL be passed to a subsequent
2179 * call to the identity callback of 'GNUNET_IDENTITY_connect' (if
2180 * that one was not NULL).
2182 * When an identity is renamed, this function is called with the
2183 * (known) ego but the NEW identifier.
2185 * When an identity is deleted, this function is called with the
2186 * (known) ego and "NULL" for the 'identifier'. In this case,
2187 * the 'ego' is henceforth invalid (and the 'ctx' should also be
2190 * @param cls closure
2191 * @param ego ego handle
2192 * @param ctx context for application to store data for this ego
2193 * (during the lifetime of this process, initially NULL)
2194 * @param identifier identifier assigned by the user for this ego,
2195 * NULL if the user just deleted the ego and it
2196 * must thus no longer be used
2199 list_ego (void *cls,
2200 struct GNUNET_IDENTITY_Ego *ego,
2202 const char *identifier)
2204 struct RequestHandle *handle = cls;
2205 struct EgoEntry *ego_entry;
2206 struct GNUNET_CRYPTO_EcdsaPublicKey pk;
2208 if ((NULL == ego) && (ID_REST_STATE_INIT == handle->state))
2210 handle->state = ID_REST_STATE_POST_INIT;
2214 GNUNET_assert (NULL != ego);
2215 if (ID_REST_STATE_INIT == handle->state)
2218 ego_entry = GNUNET_new (struct EgoEntry);
2219 GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
2220 ego_entry->keystring = GNUNET_CRYPTO_ecdsa_public_key_to_string (&pk);
2221 ego_entry->ego = ego;
2222 ego_entry->identifier = GNUNET_strdup (identifier);
2223 GNUNET_CONTAINER_DLL_insert_tail (handle->ego_head,
2228 /* Ego renamed or added */
2229 if (identifier != NULL)
2231 for (ego_entry = handle->ego_head; NULL != ego_entry;
2232 ego_entry = ego_entry->next)
2234 if (ego_entry->ego == ego)
2237 GNUNET_free (ego_entry->identifier);
2238 ego_entry->identifier = GNUNET_strdup (identifier);
2242 if (NULL == ego_entry)
2245 ego_entry = GNUNET_new (struct EgoEntry);
2246 GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
2247 ego_entry->keystring = GNUNET_CRYPTO_ecdsa_public_key_to_string (&pk);
2248 ego_entry->ego = ego;
2249 ego_entry->identifier = GNUNET_strdup (identifier);
2250 GNUNET_CONTAINER_DLL_insert_tail (handle->ego_head,
2258 for (ego_entry = handle->ego_head; NULL != ego_entry;
2259 ego_entry = ego_entry->next)
2261 if (ego_entry->ego == ego)
2264 if (NULL != ego_entry)
2265 GNUNET_CONTAINER_DLL_remove (handle->ego_head,
2273 rest_identity_process_request (struct GNUNET_REST_RequestHandle *rest_handle,
2274 GNUNET_REST_ResultProcessor proc,
2277 struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
2279 handle->oidc = GNUNET_new (struct OIDC_Variables);
2280 if (NULL == OIDC_cookie_jar_map)
2281 OIDC_cookie_jar_map = GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
2282 if (NULL == OIDC_access_token_map)
2283 OIDC_access_token_map =
2284 GNUNET_CONTAINER_multihashmap_create (10, GNUNET_NO);
2285 handle->response_code = 0;
2286 handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
2287 handle->proc_cls = proc_cls;
2288 handle->proc = proc;
2289 handle->state = ID_REST_STATE_INIT;
2290 handle->rest_handle = rest_handle;
2292 handle->url = GNUNET_strdup (rest_handle->url);
2293 if (handle->url[strlen (handle->url) - 1] == '/')
2294 handle->url[strlen (handle->url) - 1] = '\0';
2295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connecting...\n");
2296 handle->identity_handle = GNUNET_IDENTITY_connect (cfg, &list_ego, handle);
2297 handle->gns_handle = GNUNET_GNS_connect (cfg);
2298 handle->namestore_handle = GNUNET_NAMESTORE_connect (cfg);
2299 handle->timeout_task =
2300 GNUNET_SCHEDULER_add_delayed (handle->timeout, &do_timeout, handle);
2301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connected\n");
2306 * Entry point for the plugin.
2308 * @param cls Config info
2309 * @return NULL on error, otherwise the plugin context
2312 libgnunet_plugin_rest_openid_connect_init (void *cls)
2314 static struct Plugin plugin;
2315 struct GNUNET_REST_Plugin *api;
2318 if (NULL != plugin.cfg)
2319 return NULL; /* can only initialize once! */
2320 memset (&plugin, 0, sizeof(struct Plugin));
2322 api = GNUNET_new (struct GNUNET_REST_Plugin);
2324 api->name = GNUNET_REST_API_NS_OIDC;
2325 api->process_request = &rest_identity_process_request;
2326 GNUNET_asprintf (&allow_methods,
2327 "%s, %s, %s, %s, %s",
2328 MHD_HTTP_METHOD_GET,
2329 MHD_HTTP_METHOD_POST,
2330 MHD_HTTP_METHOD_PUT,
2331 MHD_HTTP_METHOD_DELETE,
2332 MHD_HTTP_METHOD_OPTIONS);
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2335 _ ("OpenID Connect REST API initialized\n"));
2341 * Exit point from the plugin.
2343 * @param cls the plugin context (as returned by "init")
2344 * @return always NULL
2347 libgnunet_plugin_rest_openid_connect_done (void *cls)
2349 struct GNUNET_REST_Plugin *api = cls;
2350 struct Plugin *plugin = api->cls;
2354 struct GNUNET_CONTAINER_MultiHashMapIterator *hashmap_it;
2357 GNUNET_CONTAINER_multihashmap_iterator_create (OIDC_cookie_jar_map);
2358 while (GNUNET_YES ==
2359 GNUNET_CONTAINER_multihashmap_iterator_next (hashmap_it, NULL, value))
2360 GNUNET_free_non_null (value);
2361 GNUNET_CONTAINER_multihashmap_iterator_destroy (hashmap_it);
2362 GNUNET_CONTAINER_multihashmap_destroy (OIDC_cookie_jar_map);
2365 GNUNET_CONTAINER_multihashmap_iterator_create (OIDC_access_token_map);
2366 while (GNUNET_YES ==
2367 GNUNET_CONTAINER_multihashmap_iterator_next (hashmap_it, NULL, value))
2368 GNUNET_free_non_null (value);
2369 GNUNET_CONTAINER_multihashmap_destroy (OIDC_access_token_map);
2370 GNUNET_CONTAINER_multihashmap_iterator_destroy (hashmap_it);
2371 GNUNET_free_non_null (allow_methods);
2373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2374 "OpenID Connect REST plugin is finished\n");
2379 /* end of plugin_rest_openid_connect.c */