2 * This is an implementation of OpenID 2.0 relying party support in stateless mode.
4 * Copyright (c) 2007-2012 by the citadel.org team
6 * This program is open source software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 #include <sys/types.h>
30 #if TIME_WITH_SYS_TIME
31 # include <sys/time.h>
35 # include <sys/time.h>
44 #include <curl/curl.h>
46 #include "ctdl_module.h"
48 #include "citserver.h"
51 typedef struct _ctdl_openid {
52 StrBuf *op_url; /* OpenID Provider Endpoint URL */
53 StrBuf *claimed_id; /* Claimed Identifier */
65 void Free_ctdl_openid(ctdl_openid **FreeMe)
67 if (*FreeMe == NULL) {
70 FreeStrBuf(&(*FreeMe)->op_url);
71 FreeStrBuf(&(*FreeMe)->claimed_id);
72 DeleteHash(&(*FreeMe)->sreg_keys);
79 * This cleanup function blows away the temporary memory used by this module.
81 void openid_cleanup_function(void) {
82 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
84 if (CCC->openid_data != NULL) {
85 syslog(LOG_DEBUG, "Clearing OpenID session state");
86 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
91 /**************************************************************************/
93 /* Functions in this section handle Citadel internal OpenID mapping stuff */
95 /**************************************************************************/
99 * The structure of an openid record *key* is:
101 * |--------------claimed_id-------------|
102 * (actual length of claimed id)
105 * The structure of an openid record *value* is:
107 * |-----user_number----|------------claimed_id---------------|
108 * (sizeof long) (actual length of claimed id)
115 * Attach an OpenID to a Citadel account
117 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
119 struct cdbdata *cdboi;
120 long fetched_usernum;
126 if (StrLength(claimed_id)==0) return(1);
128 /* Check to see if this OpenID is already in the database */
130 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
132 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
135 if (fetched_usernum == who->usernum) {
136 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
140 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
145 /* Not already in the database, so attach it now */
147 data_len = sizeof(long) + StrLength(claimed_id) + 1;
148 data = malloc(data_len);
150 memcpy(data, &who->usernum, sizeof(long));
151 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
153 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
156 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
157 who->fullname, who->usernum, ChrPtr(claimed_id));
158 CtdlAideMessage(buf, "OpenID claim");
159 syslog(LOG_INFO, "%s", buf);
166 * When a user is being deleted, we have to delete any OpenID associations
168 void openid_purge(struct ctdluser *usbuf) {
169 struct cdbdata *cdboi;
170 HashList *keys = NULL;
172 char *deleteme = NULL;
178 keys = NewHash(1, NULL);
181 cdb_rewind(CDB_OPENID);
182 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
183 if (cdboi->len > sizeof(long)) {
184 memcpy(&usernum, cdboi->ptr, sizeof(long));
185 if (usernum == usbuf->usernum) {
186 deleteme = strdup(cdboi->ptr + sizeof(long)),
187 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
193 /* Go through the hash list, deleting keys we stored in it */
195 HashPos = GetNewHashPos(keys, 0);
196 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
198 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
199 cdb_delete(CDB_OPENID, Value, strlen(Value));
200 /* note: don't free(Value) -- deleting the hash list will handle this for us */
202 DeleteHashPos(&HashPos);
208 * List the OpenIDs associated with the currently logged in account
210 void cmd_oidl(char *argbuf) {
211 struct cdbdata *cdboi;
214 if (config.c_disable_newu)
216 cprintf("%d this system does not support openid.\n",
217 ERROR + CMD_NOT_SUPPORTED);
220 if (CtdlAccessCheck(ac_logged_in)) return;
222 cdb_rewind(CDB_OPENID);
223 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
225 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
226 if (cdboi->len > sizeof(long)) {
227 memcpy(&usernum, cdboi->ptr, sizeof(long));
228 if (usernum == CC->user.usernum) {
229 cprintf("%s\n", cdboi->ptr + sizeof(long));
239 * List ALL OpenIDs in the database
241 void cmd_oida(char *argbuf) {
242 struct cdbdata *cdboi;
244 struct ctdluser usbuf;
246 if (config.c_disable_newu)
248 cprintf("%d this system does not support openid.\n",
249 ERROR + CMD_NOT_SUPPORTED);
252 if (CtdlAccessCheck(ac_aide)) return;
253 cdb_rewind(CDB_OPENID);
254 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
256 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
257 if (cdboi->len > sizeof(long)) {
258 memcpy(&usernum, cdboi->ptr, sizeof(long));
259 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
260 usbuf.fullname[0] = 0;
262 cprintf("%s|%ld|%s\n",
263 cdboi->ptr + sizeof(long),
275 * Create a new user account, manually specifying the name, after successfully
276 * verifying an OpenID (which will of course be attached to the account)
278 void cmd_oidc(char *argbuf) {
279 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
281 if (config.c_disable_newu)
283 cprintf("%d this system does not support openid.\n",
284 ERROR + CMD_NOT_SUPPORTED);
287 if ( (!oiddata) || (!oiddata->verified) ) {
288 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
292 /* We can make the semantics of OIDC exactly the same as NEWU, simply
293 * by _calling_ cmd_newu() and letting it run. Very clever!
297 /* Now, if this logged us in, we have to attach the OpenID */
299 attach_openid(&CC->user, oiddata->claimed_id);
306 * Detach an OpenID from the currently logged in account
308 void cmd_oidd(char *argbuf) {
309 struct cdbdata *cdboi;
310 char id_to_detach[1024];
311 int this_is_mine = 0;
314 if (config.c_disable_newu)
316 cprintf("%d this system does not support openid.\n",
317 ERROR + CMD_NOT_SUPPORTED);
320 if (CtdlAccessCheck(ac_logged_in)) return;
321 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
322 if (IsEmptyStr(id_to_detach)) {
323 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
326 cdb_rewind(CDB_OPENID);
327 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
328 if (cdboi->len > sizeof(long)) {
329 memcpy(&usernum, cdboi->ptr, sizeof(long));
330 if (usernum == CC->user.usernum) {
338 cprintf("%d That OpenID was not found or not associated with your account.\n",
339 ERROR + ILLEGAL_VALUE);
343 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
344 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
349 * Attempt to auto-create a new Citadel account using the nickname from Attribute Exchange
351 int openid_create_user_via_ax(StrBuf *claimed_id, HashList *sreg_keys)
353 char *nickname = NULL;
354 char *firstname = NULL;
355 char *lastname = NULL;
356 char new_password[32];
361 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
362 if (config.c_disable_newu) return(2);
363 if (CC->logged_in) return(3);
365 HashPos *HashPos = GetNewHashPos(sreg_keys, 0);
366 while (GetNextHashPos(sreg_keys, HashPos, &len, &Key, &Value) != 0) {
367 syslog(LOG_DEBUG, "%s = %s", Key, (char *)Value);
369 if (cbmstrcasestr(Key, "value.nickname") != NULL) {
370 nickname = (char *)Value;
372 else if ( (nickname == NULL) && (cbmstrcasestr(Key, "value.nickname") != NULL)) {
373 nickname = (char *)Value;
375 else if (cbmstrcasestr(Key, "value.firstname") != NULL) {
376 firstname = (char *)Value;
378 else if (cbmstrcasestr(Key, "value.lastname") != NULL) {
379 lastname = (char *)Value;
383 DeleteHashPos(&HashPos);
385 if (nickname == NULL) {
386 if ((firstname != NULL) || (lastname != NULL)) {
387 char fullname[1024] = "";
388 if (firstname) strcpy(fullname, firstname);
389 if (firstname && lastname) strcat(fullname, " ");
390 if (lastname) strcat(fullname, lastname);
395 if (nickname == NULL) {
398 syslog(LOG_DEBUG, "The desired account name is <%s>", nickname);
400 len = cutuserkey(nickname);
401 if (!CtdlGetUser(&CC->user, nickname)) {
402 syslog(LOG_DEBUG, "<%s> is already taken by another user.", nickname);
403 memset(&CC->user, 0, sizeof(struct ctdluser));
407 /* The desired account name is available. Create the account and log it in! */
408 if (create_user(nickname, len, 1)) return(6);
410 /* Generate a random password.
411 * The user doesn't care what the password is since he is using OpenID.
413 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
414 CtdlSetPassword(new_password);
416 /* Now attach the verified OpenID to this account. */
417 attach_openid(&CC->user, claimed_id);
424 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
425 * Otherwise it returns nonzero.
427 int login_via_openid(StrBuf *claimed_id)
429 struct cdbdata *cdboi;
432 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
437 memcpy(&usernum, cdboi->ptr, sizeof(long));
440 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
441 /* Now become the user we just created */
442 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
447 memset(&CC->user, 0, sizeof(struct ctdluser));
455 /**************************************************************************/
457 /* Functions in this section handle OpenID protocol */
459 /**************************************************************************/
463 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
465 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
469 const char *href_start = NULL;
470 const char *href_end = NULL;
471 const char *link_tag_start = NULL;
472 const char *link_tag_end = NULL;
473 const char *rel_start = NULL;
474 const char *rel_end = NULL;
476 if (!target_buf) return;
478 if (!source_buf) return;
480 ptr = ChrPtr(source_buf);
482 FlushStrBuf(target_buf);
483 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
485 link_tag_start = ptr;
486 link_tag_end = strchr(ptr, '>');
487 if (link_tag_end == NULL)
489 for (i=0; i < 1; i++ ){
490 rel_start = cbmstrcasestr(link_tag_start, "rel=");
491 if ((rel_start == NULL) ||
492 (rel_start > link_tag_end))
495 rel_start = strchr(rel_start, '\"');
496 if ((rel_start == NULL) ||
497 (rel_start > link_tag_end))
500 rel_end = strchr(rel_start, '\"');
501 if ((rel_end == NULL) ||
502 (rel_end == rel_start) ||
503 (rel_end >= link_tag_end) )
505 if (strncasecmp(rel, rel_start, repllen)!= 0)
506 continue; /* didn't match? never mind... */
508 href_start = cbmstrcasestr(link_tag_start, "href=");
509 if ((href_start == NULL) ||
510 (href_start >= link_tag_end))
512 href_start = strchr(href_start, '\"');
513 if ((href_start == NULL) |
514 (href_start >= link_tag_end))
517 href_end = strchr(href_start, '\"');
518 if ((href_end == NULL) ||
519 (href_end == href_start) ||
520 (href_start >= link_tag_end))
522 StrBufPlain(target_buf, href_start, href_end - href_start);
530 * Wrapper for curl_easy_init() that includes the options common to all calls
531 * used in this module.
533 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
536 curl = curl_easy_init();
541 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
542 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
545 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
547 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
548 #ifdef CURLOPT_HTTP_CONTENT_DECODING
549 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
550 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
552 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
553 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
556 (!IsEmptyStr(config.c_ip_addr))
557 && (strcmp(config.c_ip_addr, "*"))
558 && (strcmp(config.c_ip_addr, "::"))
559 && (strcmp(config.c_ip_addr, "0.0.0.0"))
561 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
572 int current_service_priority;
573 int selected_service_priority;
574 StrBuf *current_service_uri;
575 StrBuf *selected_service_uri;
576 int current_service_is_oid2auth;
580 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
581 struct xrds *xrds = (struct xrds *) data;
584 ++xrds->nesting_level;
586 if (!strcasecmp(supplied_el, "XRD")) {
590 else if (!strcasecmp(supplied_el, "service")) {
591 xrds->current_service_priority = 0;
592 xrds->current_service_is_oid2auth = 0;
593 for (i=0; attr[i] != NULL; i+=2) {
594 if (!strcasecmp(attr[i], "priority")) {
595 xrds->current_service_priority = atoi(attr[i+1]);
600 FlushStrBuf(xrds->CharData);
604 void xrds_xml_end(void *data, const char *supplied_el) {
605 struct xrds *xrds = (struct xrds *) data;
607 --xrds->nesting_level;
609 if (!strcasecmp(supplied_el, "XRD")) {
613 else if (!strcasecmp(supplied_el, "type")) {
615 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/server"))
617 xrds->current_service_is_oid2auth = 1;
620 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/signon"))
622 xrds->current_service_is_oid2auth = 1;
623 /* FIXME in this case, the Claimed ID should be considered immutable */
627 else if (!strcasecmp(supplied_el, "uri")) {
629 FlushStrBuf(xrds->current_service_uri);
630 StrBufAppendBuf(xrds->current_service_uri, xrds->CharData, 0);
634 else if (!strcasecmp(supplied_el, "service")) {
636 && (xrds->current_service_priority < xrds->selected_service_priority)
637 && (xrds->current_service_is_oid2auth)
639 xrds->selected_service_priority = xrds->current_service_priority;
640 FlushStrBuf(xrds->selected_service_uri);
641 StrBufAppendBuf(xrds->selected_service_uri, xrds->current_service_uri, 0);
646 FlushStrBuf(xrds->CharData);
650 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
651 struct xrds *xrds = (struct xrds *) data;
653 StrBufAppendBufPlain (xrds->CharData, s, len, 0);
658 * Parse an XRDS document.
659 * If an OpenID Provider URL is discovered, op_url to that value and return nonzero.
660 * If nothing useful happened, return 0.
662 int parse_xrds_document(StrBuf *ReplyBuf) {
663 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
665 int return_value = 0;
667 memset(&xrds, 0, sizeof (struct xrds));
668 xrds.selected_service_priority = INT_MAX;
669 xrds.CharData = NewStrBuf();
670 xrds.current_service_uri = NewStrBuf();
671 xrds.selected_service_uri = NewStrBuf();
672 XML_Parser xp = XML_ParserCreate(NULL);
674 XML_SetUserData(xp, &xrds);
675 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
676 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
677 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
678 XML_Parse(xp, "", 0, 1);
682 syslog(LOG_ALERT, "Cannot create XML parser");
685 if (xrds.selected_service_priority < INT_MAX) {
686 if (oiddata->op_url == NULL) {
687 oiddata->op_url = NewStrBuf();
689 FlushStrBuf(oiddata->op_url);
690 StrBufAppendBuf(oiddata->op_url, xrds.selected_service_uri, 0);
691 return_value = openid_disco_xrds;
694 FreeStrBuf(&xrds.CharData);
695 FreeStrBuf(&xrds.current_service_uri);
696 FreeStrBuf(&xrds.selected_service_uri);
698 return(return_value);
703 * Callback function for perform_openid2_discovery()
704 * We're interested in the X-XRDS-Location: header.
706 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
708 StrBuf **x_xrds_location = (StrBuf **) userdata;
710 memcpy(hdr, ptr, (size*nmemb));
713 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
714 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
715 StrBufTrim(*x_xrds_location);
718 return(size * nmemb);
722 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
724 * If Yadis fails, we then attempt HTML discovery using the same document.
726 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
727 * If fails, returns 0 and does nothing else.
729 int perform_openid2_discovery(StrBuf *SuppliedURL) {
730 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
732 StrBuf *ReplyBuf = NULL;
733 int return_value = 0;
736 char errmsg[1024] = "";
737 struct curl_slist *my_headers = NULL;
738 StrBuf *x_xrds_location = NULL;
740 if (!SuppliedURL) return(0);
741 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(SuppliedURL));
742 if (StrLength(SuppliedURL) == 0) return(0);
744 ReplyBuf = NewStrBuf();
745 if (!ReplyBuf) return(0);
747 curl = ctdl_openid_curl_easy_init(errmsg);
748 if (!curl) return(0);
750 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(SuppliedURL));
751 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
752 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
754 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
755 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
756 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
758 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
759 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
761 result = curl_easy_perform(curl);
763 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
765 curl_slist_free_all(my_headers);
766 curl_easy_cleanup(curl);
767 docbytes = StrLength(ReplyBuf);
770 * The response from the server will be one of:
772 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
773 * attribute, X-XRDS-Location,
775 * Does any provider actually do this? If so then we will implement it in the future.
779 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
780 * together with a document.
781 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
782 * a contenttype response-header specifying MIME media type,
783 * application/xrds+xml, or both.
785 * If the X-XRDS-Location header was delivered, we know about it at this point...
787 if ( (x_xrds_location)
788 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(SuppliedURL)))
790 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
791 return_value = perform_openid2_discovery(x_xrds_location);
792 FreeStrBuf(&x_xrds_location);
796 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
798 if ( (return_value == 0) && (docbytes >= 0)) {
799 return_value = parse_xrds_document(ReplyBuf);
803 * Option 5: if all else fails, attempt HTML based discovery.
805 if ( (return_value == 0) && (docbytes >= 0)) {
806 if (oiddata->op_url == NULL) {
807 oiddata->op_url = NewStrBuf();
809 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
810 if (StrLength(oiddata->op_url) > 0) {
811 return_value = openid_disco_html;
815 if (ReplyBuf != NULL) {
816 FreeStrBuf(&ReplyBuf);
818 return(return_value);
823 * Setup an OpenID authentication
825 void cmd_oids(char *argbuf) {
826 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
827 const char *Pos = NULL;
828 StrBuf *ArgBuf = NULL;
829 StrBuf *ReplyBuf = NULL;
830 StrBuf *return_to = NULL;
831 StrBuf *RedirectUrl = NULL;
832 ctdl_openid *oiddata;
833 int discovery_succeeded = 0;
835 if (config.c_disable_newu)
837 cprintf("%d this system does not support openid.\n",
838 ERROR + CMD_NOT_SUPPORTED);
841 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
843 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
844 if (oiddata == NULL) {
845 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
846 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
849 memset(oiddata, 0, sizeof(ctdl_openid));
851 ArgBuf = NewStrBufPlain(argbuf, -1);
853 oiddata->verified = 0;
854 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
855 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
857 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
858 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
860 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
862 /********** OpenID 2.0 section 7.3 - Discovery **********/
864 /* Section 7.3.1 says we have to attempt XRI based discovery.
865 * No one is using this, no one is asking for it, no one wants it.
866 * So we're not even going to bother attempting this mode.
869 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
871 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
873 if (discovery_succeeded == 0) {
874 cprintf("%d There is no OpenID identity provider at this location.\n", ERROR);
879 * If we get to this point we are in possession of a valid OpenID Provider URL.
881 syslog(LOG_DEBUG, "OP URI '%s' discovered using method %d",
882 ChrPtr(oiddata->op_url),
886 /* We have to "normalize" our Claimed ID otherwise it will cause some OP's to barf */
887 if (cbmstrcasestr(ChrPtr(oiddata->claimed_id), "://") == NULL) {
888 StrBuf *cid = oiddata->claimed_id;
889 oiddata->claimed_id = NewStrBufPlain(HKEY("http://"));
890 StrBufAppendBuf(oiddata->claimed_id, cid, 0);
895 * OpenID 2.0 section 9: request authentication
896 * Assemble a URL to which the user-agent will be redirected.
899 RedirectUrl = NewStrBufDup(oiddata->op_url);
901 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.ns="), 0);
902 StrBufUrlescAppend(RedirectUrl, NULL, "http://specs.openid.net/auth/2.0");
904 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.mode=checkid_setup"), 0);
906 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.claimed_id="), 0);
907 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
909 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.identity="), 0);
910 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
912 /* return_to tells the provider how to complete the round trip back to our site */
913 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
914 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
916 /* Attribute Exchange
918 * http://openid.net/specs/openid-attribute-exchange-1_0.html
919 * http://code.google.com/apis/accounts/docs/OpenID.html#endpoint
920 * http://test-id.net/OP/AXFetch.aspx
923 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ns.ax="), 0);
924 StrBufUrlescAppend(RedirectUrl, NULL, "http://openid.net/srv/ax/1.0");
926 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.mode=fetch_request"), 0);
928 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.required=firstname,lastname,friendly,nickname"), 0);
930 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.firstname="), 0);
931 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/first");
933 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.lastname="), 0);
934 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/last");
936 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.friendly="), 0);
937 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/friendly");
939 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.nickname="), 0);
940 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/nickname");
942 syslog(LOG_DEBUG, "OpenID: redirecting client to %s", ChrPtr(RedirectUrl));
943 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
947 FreeStrBuf(&ReplyBuf);
948 FreeStrBuf(&return_to);
949 FreeStrBuf(&RedirectUrl);
954 * Finalize an OpenID authentication
956 void cmd_oidf(char *argbuf) {
961 HashList *keys = NULL;
964 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
966 if (config.c_disable_newu)
968 cprintf("%d this system does not support openid.\n",
969 ERROR + CMD_NOT_SUPPORTED);
972 if (oiddata == NULL) {
973 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
976 if (StrLength(oiddata->op_url) == 0){
977 cprintf("%d No OpenID Endpoint URL has been obtained.\n", ERROR + ILLEGAL_VALUE);
980 keys = NewHash(1, NULL);
982 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
985 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
987 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
988 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
990 len = sizeof(thiskey) - 1;
992 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
993 Put(keys, thiskey, len, strdup(thisdata), NULL);
996 /* Check to see if this is a correct response.
997 * Start with verified=1 but then set it to 0 if anything looks wrong.
999 oiddata->verified = 1;
1001 char *openid_ns = NULL;
1002 if ( (!GetHash(keys, "ns", 2, (void *) &openid_ns))
1003 || (strcasecmp(openid_ns, "http://specs.openid.net/auth/2.0"))
1005 syslog(LOG_DEBUG, "This is not an an OpenID assertion");
1006 oiddata->verified = 0;
1009 char *openid_mode = NULL;
1010 if ( (!GetHash(keys, "mode", 4, (void *) &openid_mode))
1011 || (strcasecmp(openid_mode, "id_res"))
1013 oiddata->verified = 0;
1016 char *openid_claimed_id = NULL;
1017 if (GetHash(keys, "claimed_id", 10, (void *) &openid_claimed_id)) {
1018 FreeStrBuf(&oiddata->claimed_id);
1019 oiddata->claimed_id = NewStrBufPlain(openid_claimed_id, -1);
1020 syslog(LOG_DEBUG, "Provider is asserting the Claimed ID '%s'", ChrPtr(oiddata->claimed_id));
1023 /* Validate the assertion against the server */
1024 syslog(LOG_DEBUG, "Validating...");
1028 struct curl_httppost *formpost = NULL;
1029 struct curl_httppost *lastptr = NULL;
1030 char errmsg[1024] = "";
1031 StrBuf *ReplyBuf = NewStrBuf();
1033 curl_formadd(&formpost, &lastptr,
1034 CURLFORM_COPYNAME, "openid.mode",
1035 CURLFORM_COPYCONTENTS, "check_authentication",
1039 HashPos *HashPos = GetNewHashPos(keys, 0);
1040 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value) != 0) {
1041 if (strcasecmp(Key, "mode")) {
1042 char k_o_keyname[1024];
1043 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", (const char *)Key);
1044 curl_formadd(&formpost, &lastptr,
1045 CURLFORM_COPYNAME, k_o_keyname,
1046 CURLFORM_COPYCONTENTS, (char *)Value,
1051 DeleteHashPos(&HashPos);
1053 curl = ctdl_openid_curl_easy_init(errmsg);
1054 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->op_url));
1055 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
1056 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1057 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1059 res = curl_easy_perform(curl);
1061 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1062 oiddata->verified = 0;
1064 curl_easy_cleanup(curl);
1065 curl_formfree(formpost);
1067 /* syslog(LOG_DEBUG, "Validation reply: \n%s", ChrPtr(ReplyBuf)); */
1068 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true") == NULL) {
1069 oiddata->verified = 0;
1071 FreeStrBuf(&ReplyBuf);
1073 syslog(LOG_DEBUG, "OpenID authentication %s", (oiddata->verified ? "succeeded" : "failed") );
1075 /* Respond to the client */
1077 if (oiddata->verified) {
1079 /* If we were already logged in, attach the OpenID to the user's account */
1080 if (CC->logged_in) {
1081 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1082 cprintf("attach\n");
1083 syslog(LOG_DEBUG, "OpenID attach succeeded");
1087 syslog(LOG_DEBUG, "OpenID attach failed");
1091 /* Otherwise, a user is attempting to log in using the verified OpenID */
1094 * Existing user who has claimed this OpenID?
1096 * Note: if you think that sending the password back over the wire is insecure,
1097 * check your assumptions. If someone has successfully asserted an OpenID that
1098 * is associated with the account, they already have password equivalency and can
1099 * login, so they could just as easily change the password, etc.
1101 if (login_via_openid(oiddata->claimed_id) == 0) {
1102 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1103 logged_in_response();
1104 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1108 * If this system does not allow self-service new user registration, the
1109 * remaining modes do not apply, so fail here and now.
1111 else if (config.c_disable_newu) {
1113 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1117 * New user whose OpenID is verified and Attribute Exchange gave us a name?
1119 else if (openid_create_user_via_ax(oiddata->claimed_id, keys) == 0) {
1120 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1121 logged_in_response();
1122 syslog(LOG_DEBUG, "Successfully auto-created new user");
1126 * OpenID is verified, but the desired username either was not specified or
1127 * conflicts with an existing user. Manual account creation is required.
1130 char *desired_name = NULL;
1131 cprintf("verify_only\n");
1132 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1133 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1134 cprintf("%s\n", desired_name);
1139 syslog(LOG_DEBUG, "The desired display name is already taken.");
1148 if (oiddata->sreg_keys != NULL) {
1149 DeleteHash(&oiddata->sreg_keys);
1150 oiddata->sreg_keys = NULL;
1152 oiddata->sreg_keys = keys;
1157 /**************************************************************************/
1159 /* Functions in this section handle module initialization and shutdown */
1161 /**************************************************************************/
1166 CTDL_MODULE_INIT(openid_rp)
1169 // evcurl call this for us. curl_global_init(CURL_GLOBAL_ALL);
1171 /* Only enable the OpenID command set when native mode authentication is in use. */
1172 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1173 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1174 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1175 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1176 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1177 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1178 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1180 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT, PRIO_LOGOUT + 10);
1181 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1182 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1185 /* return our module name for the log */