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);
602 syslog(LOG_ALERT, "Unable to initialize libcurl.");
606 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(url));
607 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
608 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
610 res = curl_easy_perform(curl);
612 syslog(LOG_DEBUG, "libcurl error %d: %s", res, errmsg);
614 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
615 StrBufPlain(url, effective_url, -1);
617 curl_easy_cleanup(curl);
618 return StrLength(ReplyBuf);
626 int current_service_priority;
627 int selected_service_priority; /* more here later */
631 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
632 struct xrds *xrds = (struct xrds *) data;
635 ++xrds->nesting_level;
637 if (!strcasecmp(supplied_el, "XRD")) {
639 syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***");
642 else if (!strcasecmp(supplied_el, "service")) {
643 xrds->current_service_priority = 0;
644 for (i=0; attr[i] != NULL; i+=2) {
645 if (!strcasecmp(attr[i], "priority")) {
646 xrds->current_service_priority = atoi(attr[i+1]);
653 void xrds_xml_end(void *data, const char *supplied_el) {
654 struct xrds *xrds = (struct xrds *) data;
656 --xrds->nesting_level;
658 if (!strcasecmp(supplied_el, "XRD")) {
660 syslog(LOG_DEBUG, "*** XRD CONTAINER END ***");
663 else if (!strcasecmp(supplied_el, "service")) {
664 /* this is where we should evaluate the service and do stuff */
665 xrds->current_service_priority = 0;
670 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
671 struct xrds *xrds = (struct xrds *) data;
673 syslog(LOG_DEBUG, "%2d xrds_xml_chardata()", xrds->nesting_level);
674 /* StrBufAppendBufPlain (xrds->CData, s, len, 0); */
679 * Parse an XRDS document.
680 * If OpenID stuff is discovered, populate FIXME something and return nonzero
681 * If nothing useful happened, return 0.
683 int parse_xrds_document(StrBuf *ReplyBuf) {
686 memset(&xrds, 0, sizeof (struct xrds));
687 XML_Parser xp = XML_ParserCreate(NULL);
689 XML_SetUserData(xp, &xrds);
690 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
691 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
692 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
693 XML_Parse(xp, "", 0, 1);
697 syslog(LOG_ALERT, "Cannot create XML parser");
705 * Attempt to perform YADIS discovery.
706 * If successful, returns nonzero and fills the session's claimed ID blah FIXME this comment
707 * If YADIS fails, returns 0 and does nothing else.
709 int perform_yadis_discovery(StrBuf *YadisURL) {
711 StrBuf *ReplyBuf = NULL;
714 if (YadisURL == NULL) return(0);
715 if (StrLength(YadisURL) == 0) return(0);
722 docbytes = fetch_http(YadisURL, &ReplyBuf);
727 FreeStrBuf(&ReplyBuf);
731 /* FIXME here we need to handle Yadis 1.0 section 6.2.5.
733 * The response from the server will be one of:
735 * 1. An HTML document with a <head> element that includes a <meta> element with http-equiv
736 * attribute, X-XRDS-Location,
738 * 2. HTTP response-headers that include an X-XRDS-Location response-header, together with a
741 * 3. HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
742 * a contenttype response-header specifying MIME media type, application/xrds+xml, or both.
744 * 4. A document of MIME media type, application/xrds+xml
746 * We are only handling case #4 here and assuming that the server returned an XRDS document.
749 /* Parse the XRDS document. */
750 r = parse_xrds_document(ReplyBuf);
751 FreeStrBuf(&ReplyBuf);
757 * Setup an OpenID authentication
759 void cmd_oids(char *argbuf) {
760 const char *Pos = NULL;
761 StrBuf *ArgBuf = NULL;
762 StrBuf *ReplyBuf = NULL;
763 StrBuf *return_to = NULL;
764 StrBuf *trust_root = NULL;
765 StrBuf *openid_delegate = NULL;
766 StrBuf *RedirectUrl = NULL;
767 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
768 ctdl_openid *oiddata;
770 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
772 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
773 if (oiddata == NULL) {
774 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
777 memset(oiddata, 0, sizeof(ctdl_openid));
778 CCC->openid_data = (void *) oiddata;
780 ArgBuf = NewStrBufPlain(argbuf, -1);
782 oiddata->verified = 0;
783 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
784 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
785 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
787 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
788 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
789 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
791 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
794 /********** OpenID 2.0 section 7.3 - Discovery **********/
796 /* First we're supposed to attempt XRI based resolution.
797 * No one is using this, no one is asking for it, no one wants it.
798 * So we're not even going to bother attempting this mode.
801 /* Second we attempt YADIS.
802 * Google uses this so we'd better do our best to implement it.
804 int yadis_succeeded = perform_yadis_discovery(oiddata->claimed_id);
806 /* Third we attempt HTML-based discovery. Here we go! */
807 if ( (yadis_succeeded == 0)
808 && (fetch_http(oiddata->claimed_id, &ReplyBuf) > 0)
809 && (StrLength(ReplyBuf) > 0)
811 openid_delegate = NewStrBuf();
812 oiddata->server = NewStrBuf();
813 extract_link(oiddata->server, HKEY("openid.server"), ReplyBuf);
814 extract_link(openid_delegate, HKEY("openid.delegate"), ReplyBuf);
816 if (StrLength(oiddata->server) == 0) {
817 cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
819 FreeStrBuf(&ReplyBuf);
820 FreeStrBuf(&return_to);
821 FreeStrBuf(&trust_root);
822 FreeStrBuf(&openid_delegate);
823 FreeStrBuf(&RedirectUrl);
827 /* Empty delegate is legal; we just use the openid_url instead */
828 if (StrLength(openid_delegate) == 0) {
829 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
832 /* Assemble a URL to which the user-agent will be redirected. */
834 RedirectUrl = NewStrBufDup(oiddata->server);
836 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup"
837 "&openid.identity="), 0);
838 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
840 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
841 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
843 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
844 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
846 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
847 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
849 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
852 FreeStrBuf(&ReplyBuf);
853 FreeStrBuf(&return_to);
854 FreeStrBuf(&trust_root);
855 FreeStrBuf(&openid_delegate);
856 FreeStrBuf(&RedirectUrl);
862 FreeStrBuf(&ReplyBuf);
863 FreeStrBuf(&return_to);
864 FreeStrBuf(&trust_root);
865 FreeStrBuf(&openid_delegate);
866 FreeStrBuf(&RedirectUrl);
868 cprintf("%d Unable to fetch OpenID URL\n", ERROR);
876 * Finalize an OpenID authentication
878 void cmd_oidf(char *argbuf) {
883 HashList *keys = NULL;
884 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
886 if (oiddata == NULL) {
887 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
890 if (StrLength(oiddata->server) == 0){
891 cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE);
894 keys = NewHash(1, NULL);
896 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
899 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
901 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
902 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
904 len = sizeof(thiskey) - 1;
905 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
906 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
907 Put(keys, thiskey, len, strdup(thisdata), NULL);
911 /* Now that we have all of the parameters, we have to validate the signature against the server */
912 syslog(LOG_DEBUG, "About to validate the signature...");
916 struct curl_httppost *formpost = NULL;
917 struct curl_httppost *lastptr = NULL;
918 char errmsg[1024] = "";
919 char *o_assoc_handle = NULL;
921 char *o_signed = NULL;
922 int num_signed_values;
925 char k_o_keyname[128];
926 char *k_value = NULL;
929 curl_formadd(&formpost, &lastptr,
930 CURLFORM_COPYNAME, "openid.mode",
931 CURLFORM_COPYCONTENTS, "check_authentication",
933 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
935 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
936 curl_formadd(&formpost, &lastptr,
937 CURLFORM_COPYNAME, "openid.assoc_handle",
938 CURLFORM_COPYCONTENTS, o_assoc_handle,
940 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
943 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
944 curl_formadd(&formpost, &lastptr,
945 CURLFORM_COPYNAME, "openid.sig",
946 CURLFORM_COPYCONTENTS, o_sig,
948 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
951 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
952 curl_formadd(&formpost, &lastptr,
953 CURLFORM_COPYNAME, "openid.signed",
954 CURLFORM_COPYCONTENTS, o_signed,
956 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
958 num_signed_values = num_tokens(o_signed, ',');
959 for (i=0; i<num_signed_values; ++i) {
960 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
961 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
962 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
963 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
964 curl_formadd(&formpost, &lastptr,
965 CURLFORM_COPYNAME, k_o_keyname,
966 CURLFORM_COPYCONTENTS, k_value,
968 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
971 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
978 ReplyBuf = NewStrBuf();
980 curl = ctdl_openid_curl_easy_init(errmsg);
981 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->server));
982 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
983 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
984 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
986 res = curl_easy_perform(curl);
988 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
990 curl_easy_cleanup(curl);
991 curl_formfree(formpost);
993 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
994 oiddata->verified = 1;
996 FreeStrBuf(&ReplyBuf);
998 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1000 /* Respond to the client */
1002 if (oiddata->verified) {
1004 /* If we were already logged in, attach the OpenID to the user's account */
1005 if (CC->logged_in) {
1006 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1007 cprintf("attach\n");
1008 syslog(LOG_DEBUG, "OpenID attach succeeded");
1012 syslog(LOG_DEBUG, "OpenID attach failed");
1016 /* Otherwise, a user is attempting to log in using the verified OpenID */
1019 * Existing user who has claimed this OpenID?
1021 * Note: if you think that sending the password back over the wire is insecure,
1022 * check your assumptions. If someone has successfully asserted an OpenID that
1023 * is associated with the account, they already have password equivalency and can
1024 * login, so they could just as easily change the password, etc.
1026 if (login_via_openid(oiddata->claimed_id) == 0) {
1027 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1028 logged_in_response();
1029 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1033 * If this system does not allow self-service new user registration, the
1034 * remaining modes do not apply, so fail here and now.
1036 else if (config.c_disable_newu) {
1038 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1042 * New user whose OpenID is verified and Simple Registration Extension is in use?
1044 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1045 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1046 logged_in_response();
1047 syslog(LOG_DEBUG, "Successfully auto-created new user");
1051 * OpenID is verified, but the desired username either was not specified or
1052 * conflicts with an existing user. Manual account creation is required.
1055 char *desired_name = NULL;
1056 cprintf("verify_only\n");
1057 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1058 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1059 cprintf("%s\n", desired_name);
1064 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1073 if (oiddata->sreg_keys != NULL) {
1074 DeleteHash(&oiddata->sreg_keys);
1075 oiddata->sreg_keys = NULL;
1077 oiddata->sreg_keys = keys;
1082 /**************************************************************************/
1084 /* Functions in this section handle module initialization and shutdown */
1086 /**************************************************************************/
1091 CTDL_MODULE_INIT(openid_rp)
1094 curl_global_init(CURL_GLOBAL_ALL);
1096 /* Only enable the OpenID command set when native mode authentication is in use. */
1097 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1098 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1099 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1100 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1101 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1102 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1103 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1105 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1106 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1107 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1110 /* return our module name for the log */