2 * This is an implementation of OpenID 2.0 RELYING PARTY SUPPORT CURRENTLY B0RKEN AND BEING DEVEL0PZ0RED
4 * Copyright (c) 2007-2011 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 {
58 void Free_ctdl_openid(ctdl_openid **FreeMe)
62 FreeStrBuf(&(*FreeMe)->claimed_id);
63 FreeStrBuf(&(*FreeMe)->server);
64 DeleteHash(&(*FreeMe)->sreg_keys);
71 * This cleanup function blows away the temporary memory used by this module.
73 void openid_cleanup_function(void) {
74 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
76 if (CCC->openid_data != NULL) {
77 syslog(LOG_DEBUG, "Clearing OpenID session state");
78 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
83 /**************************************************************************/
85 /* Functions in this section handle Citadel internal OpenID mapping stuff */
87 /**************************************************************************/
91 * The structure of an openid record *key* is:
93 * |--------------claimed_id-------------|
94 * (actual length of claimed id)
97 * The structure of an openid record *value* is:
99 * |-----user_number----|------------claimed_id---------------|
100 * (sizeof long) (actual length of claimed id)
107 * Attach an OpenID to a Citadel account
109 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
111 struct cdbdata *cdboi;
112 long fetched_usernum;
118 if (StrLength(claimed_id)==0) return(1);
120 /* Check to see if this OpenID is already in the database */
122 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
124 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
127 if (fetched_usernum == who->usernum) {
128 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
132 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
137 /* Not already in the database, so attach it now */
139 data_len = sizeof(long) + StrLength(claimed_id) + 1;
140 data = malloc(data_len);
142 memcpy(data, &who->usernum, sizeof(long));
143 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
145 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
148 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
149 who->fullname, who->usernum, ChrPtr(claimed_id));
150 CtdlAideMessage(buf, "OpenID claim");
151 syslog(LOG_INFO, "%s", buf);
158 * When a user is being deleted, we have to delete any OpenID associations
160 void openid_purge(struct ctdluser *usbuf) {
161 struct cdbdata *cdboi;
162 HashList *keys = NULL;
164 char *deleteme = NULL;
170 keys = NewHash(1, NULL);
173 cdb_rewind(CDB_OPENID);
174 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
175 if (cdboi->len > sizeof(long)) {
176 memcpy(&usernum, cdboi->ptr, sizeof(long));
177 if (usernum == usbuf->usernum) {
178 deleteme = strdup(cdboi->ptr + sizeof(long)),
179 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
185 /* Go through the hash list, deleting keys we stored in it */
187 HashPos = GetNewHashPos(keys, 0);
188 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
190 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
191 cdb_delete(CDB_OPENID, Value, strlen(Value));
192 /* note: don't free(Value) -- deleting the hash list will handle this for us */
194 DeleteHashPos(&HashPos);
200 * List the OpenIDs associated with the currently logged in account
202 void cmd_oidl(char *argbuf) {
203 struct cdbdata *cdboi;
206 if (CtdlAccessCheck(ac_logged_in)) return;
207 cdb_rewind(CDB_OPENID);
208 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
210 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
211 if (cdboi->len > sizeof(long)) {
212 memcpy(&usernum, cdboi->ptr, sizeof(long));
213 if (usernum == CC->user.usernum) {
214 cprintf("%s\n", cdboi->ptr + sizeof(long));
224 * List ALL OpenIDs in the database
226 void cmd_oida(char *argbuf) {
227 struct cdbdata *cdboi;
229 struct ctdluser usbuf;
231 if (CtdlAccessCheck(ac_aide)) return;
232 cdb_rewind(CDB_OPENID);
233 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
235 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
236 if (cdboi->len > sizeof(long)) {
237 memcpy(&usernum, cdboi->ptr, sizeof(long));
238 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
239 usbuf.fullname[0] = 0;
241 cprintf("%s|%ld|%s\n",
242 cdboi->ptr + sizeof(long),
254 * Attempt to register (populate the vCard) the currently-logged-in user
255 * using the data from Simple Registration Extension, if present.
257 void populate_vcard_from_sreg(HashList *sreg_keys) {
260 int pop = 0; /* number of fields populated */
262 char *postcode = NULL;
263 char *country = NULL;
265 if (!sreg_keys) return;
269 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
270 vcard_add_prop(v, "url;type=openid", data);
274 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
275 vcard_add_prop(v, "email;internet", data);
279 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
280 vcard_add_prop(v, "nickname", data);
284 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
286 vcard_add_prop(v, "fn", data);
287 vcard_fn_to_n(n, data, sizeof n);
288 vcard_add_prop(v, "n", n);
292 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
296 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
300 if (postcode || country) {
302 snprintf(adr, sizeof adr, ";;;;;%s;%s",
303 (postcode ? postcode : ""),
304 (country ? country : "")
306 vcard_add_prop(v, "adr", adr);
310 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
311 vcard_add_prop(v, "bday", data);
315 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
316 vcard_add_prop(v, "x-funambol-gender", data);
320 /* Only save the vCard if there is some useful data in it */
323 ser = vcard_serialize(v);
325 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
326 ser, strlen(ser)+1, &CC->user, 0, 0, 0
336 * Create a new user account, manually specifying the name, after successfully
337 * verifying an OpenID (which will of course be attached to the account)
339 void cmd_oidc(char *argbuf) {
340 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
343 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
347 if (!oiddata->verified) {
348 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
352 /* We can make the semantics of OIDC exactly the same as NEWU, simply
353 * by _calling_ cmd_newu() and letting it run. Very clever!
357 /* Now, if this logged us in, we have to attach the OpenID */
359 attach_openid(&CC->user, oiddata->claimed_id);
360 if (oiddata->sreg_keys != NULL) {
361 populate_vcard_from_sreg(oiddata->sreg_keys);
369 * Detach an OpenID from the currently logged in account
371 void cmd_oidd(char *argbuf) {
372 struct cdbdata *cdboi;
373 char id_to_detach[1024];
374 int this_is_mine = 0;
377 if (CtdlAccessCheck(ac_logged_in)) return;
378 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
379 if (IsEmptyStr(id_to_detach)) {
380 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
383 cdb_rewind(CDB_OPENID);
384 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
385 if (cdboi->len > sizeof(long)) {
386 memcpy(&usernum, cdboi->ptr, sizeof(long));
387 if (usernum == CC->user.usernum) {
395 cprintf("%d That OpenID was not found or not associated with your account.\n",
396 ERROR + ILLEGAL_VALUE);
400 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
401 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
407 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
409 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
411 char *desired_name = NULL;
412 char new_password[32];
415 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
416 if (config.c_disable_newu) return(2);
417 if (CC->logged_in) return(3);
418 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
420 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
422 len = cutuserkey(desired_name);
423 if (!CtdlGetUser(&CC->user, desired_name)) {
424 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
425 memset(&CC->user, 0, sizeof(struct ctdluser));
429 /* The desired account name is available. Create the account and log it in! */
430 if (create_user(desired_name, len, 1)) return(6);
432 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
433 CtdlSetPassword(new_password);
434 attach_openid(&CC->user, claimed_id);
435 populate_vcard_from_sreg(sreg_keys);
441 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
442 * Otherwise it returns nonzero.
444 int login_via_openid(StrBuf *claimed_id)
446 struct cdbdata *cdboi;
449 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
454 memcpy(&usernum, cdboi->ptr, sizeof(long));
457 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
458 /* Now become the user we just created */
459 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
464 memset(&CC->user, 0, sizeof(struct ctdluser));
472 /**************************************************************************/
474 /* Functions in this section handle OpenID protocol */
476 /**************************************************************************/
480 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
482 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
486 const char *href_start = NULL;
487 const char *href_end = NULL;
488 const char *link_tag_start = NULL;
489 const char *link_tag_end = NULL;
490 const char *rel_start = NULL;
491 const char *rel_end = NULL;
493 if (!target_buf) return;
495 if (!source_buf) return;
497 ptr = ChrPtr(source_buf);
499 FlushStrBuf(target_buf);
500 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
502 link_tag_start = ptr;
503 link_tag_end = strchr(ptr, '>');
504 if (link_tag_end == NULL)
506 for (i=0; i < 1; i++ ){
507 rel_start = cbmstrcasestr(link_tag_start, "rel=");
508 if ((rel_start == NULL) ||
509 (rel_start > link_tag_end))
512 rel_start = strchr(rel_start, '\"');
513 if ((rel_start == NULL) ||
514 (rel_start > link_tag_end))
517 rel_end = strchr(rel_start, '\"');
518 if ((rel_end == NULL) ||
519 (rel_end == rel_start) ||
520 (rel_end >= link_tag_end) )
522 if (strncasecmp(rel, rel_start, repllen)!= 0)
523 continue; /* didn't match? never mind... */
525 href_start = cbmstrcasestr(link_tag_start, "href=");
526 if ((href_start == NULL) ||
527 (href_start >= link_tag_end))
529 href_start = strchr(href_start, '\"');
530 if ((href_start == NULL) |
531 (href_start >= link_tag_end))
534 href_end = strchr(href_start, '\"');
535 if ((href_end == NULL) ||
536 (href_end == href_start) ||
537 (href_start >= link_tag_end))
539 StrBufPlain(target_buf, href_start, href_end - href_start);
547 * Wrapper for curl_easy_init() that includes the options common to all calls
548 * used in this module.
550 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
553 curl = curl_easy_init();
558 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
559 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
562 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
564 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
565 #ifdef CURLOPT_HTTP_CONTENT_DECODING
566 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
567 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
569 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
570 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 180); /* die after 180 seconds */
573 (!IsEmptyStr(config.c_ip_addr))
574 && (strcmp(config.c_ip_addr, "*"))
575 && (strcmp(config.c_ip_addr, "::"))
576 && (strcmp(config.c_ip_addr, "0.0.0.0"))
578 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
586 * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
588 int fetch_http(StrBuf *url, StrBuf **target_buf)
593 char *effective_url = NULL;
594 char errmsg[1024] = "";
596 if (StrLength(url) <=0 ) return(-1);
597 ReplyBuf = *target_buf = NewStrBuf ();
598 if (ReplyBuf == 0) return(-1);
600 curl = ctdl_openid_curl_easy_init(errmsg);
601 if (!curl) return(-1);
603 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(url));
604 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
605 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
607 result = curl_easy_perform(curl);
609 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
611 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
612 StrBufPlain(url, effective_url, -1);
614 curl_easy_cleanup(curl);
615 return StrLength(ReplyBuf);
623 int current_service_priority;
624 int selected_service_priority; /* more here later */
628 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
629 struct xrds *xrds = (struct xrds *) data;
632 ++xrds->nesting_level;
634 if (!strcasecmp(supplied_el, "XRD")) {
636 syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***");
639 else if (!strcasecmp(supplied_el, "service")) {
640 xrds->current_service_priority = 0;
641 for (i=0; attr[i] != NULL; i+=2) {
642 if (!strcasecmp(attr[i], "priority")) {
643 xrds->current_service_priority = atoi(attr[i+1]);
650 void xrds_xml_end(void *data, const char *supplied_el) {
651 struct xrds *xrds = (struct xrds *) data;
653 --xrds->nesting_level;
655 if (!strcasecmp(supplied_el, "XRD")) {
657 syslog(LOG_DEBUG, "*** XRD CONTAINER END ***");
660 else if (!strcasecmp(supplied_el, "service")) {
661 /* this is where we should evaluate the service and do stuff */
662 xrds->current_service_priority = 0;
667 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
668 struct xrds *xrds = (struct xrds *) data;
670 if (xrds) ; /* this is only here to silence the warning for now */
672 /* StrBufAppendBufPlain (xrds->CData, s, len, 0); */
677 * Parse an XRDS document.
678 * If OpenID stuff is discovered, populate FIXME something and return nonzero
679 * If nothing useful happened, return 0.
681 int parse_xrds_document(StrBuf *ReplyBuf) {
684 memset(&xrds, 0, sizeof (struct xrds));
685 XML_Parser xp = XML_ParserCreate(NULL);
687 XML_SetUserData(xp, &xrds);
688 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
689 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
690 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
691 XML_Parse(xp, "", 0, 1);
695 syslog(LOG_ALERT, "Cannot create XML parser");
698 return(0); /* FIXME return nonzero if something wonderful happened */
702 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
703 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
704 * If Yadis fails, returns 0 and does nothing else.
706 int perform_yadis_discovery(StrBuf *YadisURL) {
708 StrBuf *ReplyBuf = NULL;
712 char errmsg[1024] = "";
713 struct curl_slist *my_headers = NULL;
715 if (YadisURL == NULL) return(0);
716 if (StrLength(YadisURL) == 0) return(0);
718 ReplyBuf = NewStrBuf ();
719 if (ReplyBuf == 0) return(0);
721 curl = ctdl_openid_curl_easy_init(errmsg);
722 if (!curl) return(0);
724 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
725 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
726 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
728 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
729 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
730 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
732 result = curl_easy_perform(curl);
734 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
736 curl_slist_free_all(my_headers);
737 curl_easy_cleanup(curl);
739 docbytes = StrLength(ReplyBuf);
741 /* FIXME here we need to handle Yadis 1.0 section 6.2.5.
743 * The response from the server will be one of:
745 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
746 * attribute, X-XRDS-Location,
748 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header, together with a
749 * document (NOTE: we can probably recurse for this)
751 * Option 3:. HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
752 * a contenttype response-header specifying MIME media type, application/xrds+xml, or both.
757 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
761 r = parse_xrds_document(ReplyBuf);
762 FreeStrBuf(&ReplyBuf);
770 * Setup an OpenID authentication
772 void cmd_oids(char *argbuf) {
773 const char *Pos = NULL;
774 StrBuf *ArgBuf = NULL;
775 StrBuf *ReplyBuf = NULL;
776 StrBuf *return_to = NULL;
777 StrBuf *trust_root = NULL;
778 StrBuf *openid_delegate = NULL;
779 StrBuf *RedirectUrl = NULL;
780 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
781 ctdl_openid *oiddata;
783 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
785 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
786 if (oiddata == NULL) {
787 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
790 memset(oiddata, 0, sizeof(ctdl_openid));
791 CCC->openid_data = (void *) oiddata;
793 ArgBuf = NewStrBufPlain(argbuf, -1);
795 oiddata->verified = 0;
796 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
797 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
798 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
800 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
801 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
802 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
804 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
807 /********** OpenID 2.0 section 7.3 - Discovery **********/
809 /* First we're supposed to attempt XRI based resolution.
810 * No one is using this, no one is asking for it, no one wants it.
811 * So we're not even going to bother attempting this mode.
814 /* Second we attempt Yadis.
815 * Google uses this so we'd better do our best to implement it.
817 int yadis_succeeded = perform_yadis_discovery(oiddata->claimed_id);
819 /* Third we attempt HTML-based discovery. Here we go! */
820 if ( (yadis_succeeded == 0)
821 && (fetch_http(oiddata->claimed_id, &ReplyBuf) > 0)
822 && (StrLength(ReplyBuf) > 0)
824 openid_delegate = NewStrBuf();
825 oiddata->server = NewStrBuf();
826 extract_link(oiddata->server, HKEY("openid.server"), ReplyBuf);
827 extract_link(openid_delegate, HKEY("openid.delegate"), ReplyBuf);
829 if (StrLength(oiddata->server) == 0) {
830 cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
832 FreeStrBuf(&ReplyBuf);
833 FreeStrBuf(&return_to);
834 FreeStrBuf(&trust_root);
835 FreeStrBuf(&openid_delegate);
836 FreeStrBuf(&RedirectUrl);
840 /* Empty delegate is legal; we just use the openid_url instead */
841 if (StrLength(openid_delegate) == 0) {
842 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
845 /* Assemble a URL to which the user-agent will be redirected. */
847 RedirectUrl = NewStrBufDup(oiddata->server);
849 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup"
850 "&openid.identity="), 0);
851 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
853 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
854 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
856 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
857 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
859 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
860 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
862 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
865 FreeStrBuf(&ReplyBuf);
866 FreeStrBuf(&return_to);
867 FreeStrBuf(&trust_root);
868 FreeStrBuf(&openid_delegate);
869 FreeStrBuf(&RedirectUrl);
875 FreeStrBuf(&ReplyBuf);
876 FreeStrBuf(&return_to);
877 FreeStrBuf(&trust_root);
878 FreeStrBuf(&openid_delegate);
879 FreeStrBuf(&RedirectUrl);
881 cprintf("%d Unable to fetch OpenID URL\n", ERROR);
889 * Finalize an OpenID authentication
891 void cmd_oidf(char *argbuf) {
896 HashList *keys = NULL;
897 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
899 if (oiddata == NULL) {
900 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
903 if (StrLength(oiddata->server) == 0){
904 cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE);
907 keys = NewHash(1, NULL);
909 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
912 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
914 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
915 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
917 len = sizeof(thiskey) - 1;
918 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
919 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
920 Put(keys, thiskey, len, strdup(thisdata), NULL);
924 /* Now that we have all of the parameters, we have to validate the signature against the server */
925 syslog(LOG_DEBUG, "About to validate the signature...");
929 struct curl_httppost *formpost = NULL;
930 struct curl_httppost *lastptr = NULL;
931 char errmsg[1024] = "";
932 char *o_assoc_handle = NULL;
934 char *o_signed = NULL;
935 int num_signed_values;
938 char k_o_keyname[128];
939 char *k_value = NULL;
942 curl_formadd(&formpost, &lastptr,
943 CURLFORM_COPYNAME, "openid.mode",
944 CURLFORM_COPYCONTENTS, "check_authentication",
946 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
948 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
949 curl_formadd(&formpost, &lastptr,
950 CURLFORM_COPYNAME, "openid.assoc_handle",
951 CURLFORM_COPYCONTENTS, o_assoc_handle,
953 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
956 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
957 curl_formadd(&formpost, &lastptr,
958 CURLFORM_COPYNAME, "openid.sig",
959 CURLFORM_COPYCONTENTS, o_sig,
961 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
964 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
965 curl_formadd(&formpost, &lastptr,
966 CURLFORM_COPYNAME, "openid.signed",
967 CURLFORM_COPYCONTENTS, o_signed,
969 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
971 num_signed_values = num_tokens(o_signed, ',');
972 for (i=0; i<num_signed_values; ++i) {
973 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
974 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
975 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
976 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
977 curl_formadd(&formpost, &lastptr,
978 CURLFORM_COPYNAME, k_o_keyname,
979 CURLFORM_COPYCONTENTS, k_value,
981 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
984 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
991 ReplyBuf = NewStrBuf();
993 curl = ctdl_openid_curl_easy_init(errmsg);
994 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->server));
995 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
996 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
997 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
999 res = curl_easy_perform(curl);
1001 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1003 curl_easy_cleanup(curl);
1004 curl_formfree(formpost);
1006 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
1007 oiddata->verified = 1;
1009 FreeStrBuf(&ReplyBuf);
1011 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1013 /* Respond to the client */
1015 if (oiddata->verified) {
1017 /* If we were already logged in, attach the OpenID to the user's account */
1018 if (CC->logged_in) {
1019 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1020 cprintf("attach\n");
1021 syslog(LOG_DEBUG, "OpenID attach succeeded");
1025 syslog(LOG_DEBUG, "OpenID attach failed");
1029 /* Otherwise, a user is attempting to log in using the verified OpenID */
1032 * Existing user who has claimed this OpenID?
1034 * Note: if you think that sending the password back over the wire is insecure,
1035 * check your assumptions. If someone has successfully asserted an OpenID that
1036 * is associated with the account, they already have password equivalency and can
1037 * login, so they could just as easily change the password, etc.
1039 if (login_via_openid(oiddata->claimed_id) == 0) {
1040 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1041 logged_in_response();
1042 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1046 * If this system does not allow self-service new user registration, the
1047 * remaining modes do not apply, so fail here and now.
1049 else if (config.c_disable_newu) {
1051 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1055 * New user whose OpenID is verified and Simple Registration Extension is in use?
1057 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1058 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1059 logged_in_response();
1060 syslog(LOG_DEBUG, "Successfully auto-created new user");
1064 * OpenID is verified, but the desired username either was not specified or
1065 * conflicts with an existing user. Manual account creation is required.
1068 char *desired_name = NULL;
1069 cprintf("verify_only\n");
1070 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1071 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1072 cprintf("%s\n", desired_name);
1077 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1086 if (oiddata->sreg_keys != NULL) {
1087 DeleteHash(&oiddata->sreg_keys);
1088 oiddata->sreg_keys = NULL;
1090 oiddata->sreg_keys = keys;
1095 /**************************************************************************/
1097 /* Functions in this section handle module initialization and shutdown */
1099 /**************************************************************************/
1104 CTDL_MODULE_INIT(openid_rp)
1107 curl_global_init(CURL_GLOBAL_ALL);
1109 /* Only enable the OpenID command set when native mode authentication is in use. */
1110 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1111 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1112 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1113 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1114 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1115 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1116 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1118 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1119 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1120 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1123 /* return our module name for the log */