2 * This is an implementation of OpenID 2.0 RELYING PARTY SUPPORT CURRENTLY B0RKEN AND BEING DEVEL0PZ0RED
5 OPENID2 BRANCH -- NEEDS TO BE MERGEZ0RED !!!!!!111
8 * Copyright (c) 2007-2011 by the citadel.org team
10 * This program is open source software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
32 #include <sys/types.h>
34 #if TIME_WITH_SYS_TIME
35 # include <sys/time.h>
39 # include <sys/time.h>
48 #include <curl/curl.h>
50 #include "ctdl_module.h"
52 #include "citserver.h"
55 typedef struct _ctdl_openid {
56 StrBuf *op_url; /* OpenID Provider Endpoint URL */
57 StrBuf *claimed_id; /* Claimed Identifier */
69 void Free_ctdl_openid(ctdl_openid **FreeMe)
71 if (*FreeMe == NULL) {
74 FreeStrBuf(&(*FreeMe)->op_url);
75 FreeStrBuf(&(*FreeMe)->claimed_id);
76 DeleteHash(&(*FreeMe)->sreg_keys);
83 * This cleanup function blows away the temporary memory used by this module.
85 void openid_cleanup_function(void) {
86 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
88 if (CCC->openid_data != NULL) {
89 syslog(LOG_DEBUG, "Clearing OpenID session state");
90 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
95 /**************************************************************************/
97 /* Functions in this section handle Citadel internal OpenID mapping stuff */
99 /**************************************************************************/
103 * The structure of an openid record *key* is:
105 * |--------------claimed_id-------------|
106 * (actual length of claimed id)
109 * The structure of an openid record *value* is:
111 * |-----user_number----|------------claimed_id---------------|
112 * (sizeof long) (actual length of claimed id)
119 * Attach an OpenID to a Citadel account
121 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
123 struct cdbdata *cdboi;
124 long fetched_usernum;
130 if (StrLength(claimed_id)==0) return(1);
132 /* Check to see if this OpenID is already in the database */
134 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
136 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
139 if (fetched_usernum == who->usernum) {
140 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
144 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
149 /* Not already in the database, so attach it now */
151 data_len = sizeof(long) + StrLength(claimed_id) + 1;
152 data = malloc(data_len);
154 memcpy(data, &who->usernum, sizeof(long));
155 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
157 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
160 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
161 who->fullname, who->usernum, ChrPtr(claimed_id));
162 CtdlAideMessage(buf, "OpenID claim");
163 syslog(LOG_INFO, "%s", buf);
170 * When a user is being deleted, we have to delete any OpenID associations
172 void openid_purge(struct ctdluser *usbuf) {
173 struct cdbdata *cdboi;
174 HashList *keys = NULL;
176 char *deleteme = NULL;
182 keys = NewHash(1, NULL);
185 cdb_rewind(CDB_OPENID);
186 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
187 if (cdboi->len > sizeof(long)) {
188 memcpy(&usernum, cdboi->ptr, sizeof(long));
189 if (usernum == usbuf->usernum) {
190 deleteme = strdup(cdboi->ptr + sizeof(long)),
191 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
197 /* Go through the hash list, deleting keys we stored in it */
199 HashPos = GetNewHashPos(keys, 0);
200 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
202 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
203 cdb_delete(CDB_OPENID, Value, strlen(Value));
204 /* note: don't free(Value) -- deleting the hash list will handle this for us */
206 DeleteHashPos(&HashPos);
212 * List the OpenIDs associated with the currently logged in account
214 void cmd_oidl(char *argbuf) {
215 struct cdbdata *cdboi;
218 if (CtdlAccessCheck(ac_logged_in)) return;
219 cdb_rewind(CDB_OPENID);
220 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
222 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
223 if (cdboi->len > sizeof(long)) {
224 memcpy(&usernum, cdboi->ptr, sizeof(long));
225 if (usernum == CC->user.usernum) {
226 cprintf("%s\n", cdboi->ptr + sizeof(long));
236 * List ALL OpenIDs in the database
238 void cmd_oida(char *argbuf) {
239 struct cdbdata *cdboi;
241 struct ctdluser usbuf;
243 if (CtdlAccessCheck(ac_aide)) return;
244 cdb_rewind(CDB_OPENID);
245 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
247 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
248 if (cdboi->len > sizeof(long)) {
249 memcpy(&usernum, cdboi->ptr, sizeof(long));
250 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
251 usbuf.fullname[0] = 0;
253 cprintf("%s|%ld|%s\n",
254 cdboi->ptr + sizeof(long),
266 * Attempt to register (populate the vCard) the currently-logged-in user
267 * using the data from Simple Registration Extension, if present.
269 void populate_vcard_from_sreg(HashList *sreg_keys) {
272 int pop = 0; /* number of fields populated */
274 char *postcode = NULL;
275 char *country = NULL;
277 if (!sreg_keys) return;
281 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
282 vcard_add_prop(v, "url;type=openid", data);
286 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
287 vcard_add_prop(v, "email;internet", data);
291 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
292 vcard_add_prop(v, "nickname", data);
296 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
298 vcard_add_prop(v, "fn", data);
299 vcard_fn_to_n(n, data, sizeof n);
300 vcard_add_prop(v, "n", n);
304 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
308 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
312 if (postcode || country) {
314 snprintf(adr, sizeof adr, ";;;;;%s;%s",
315 (postcode ? postcode : ""),
316 (country ? country : "")
318 vcard_add_prop(v, "adr", adr);
322 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
323 vcard_add_prop(v, "bday", data);
327 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
328 vcard_add_prop(v, "x-funambol-gender", data);
332 /* Only save the vCard if there is some useful data in it */
335 ser = vcard_serialize(v);
337 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
338 ser, strlen(ser)+1, &CC->user, 0, 0, 0
348 * Create a new user account, manually specifying the name, after successfully
349 * verifying an OpenID (which will of course be attached to the account)
351 void cmd_oidc(char *argbuf) {
352 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
354 if ( (!oiddata) || (!oiddata->verified) ) {
355 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
359 /* We can make the semantics of OIDC exactly the same as NEWU, simply
360 * by _calling_ cmd_newu() and letting it run. Very clever!
364 /* Now, if this logged us in, we have to attach the OpenID */
366 attach_openid(&CC->user, oiddata->claimed_id);
367 if (oiddata->sreg_keys != NULL) {
368 populate_vcard_from_sreg(oiddata->sreg_keys);
376 * Detach an OpenID from the currently logged in account
378 void cmd_oidd(char *argbuf) {
379 struct cdbdata *cdboi;
380 char id_to_detach[1024];
381 int this_is_mine = 0;
384 if (CtdlAccessCheck(ac_logged_in)) return;
385 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
386 if (IsEmptyStr(id_to_detach)) {
387 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
390 cdb_rewind(CDB_OPENID);
391 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
392 if (cdboi->len > sizeof(long)) {
393 memcpy(&usernum, cdboi->ptr, sizeof(long));
394 if (usernum == CC->user.usernum) {
402 cprintf("%d That OpenID was not found or not associated with your account.\n",
403 ERROR + ILLEGAL_VALUE);
407 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
408 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
413 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
415 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
417 char *desired_name = NULL;
418 char new_password[32];
421 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
422 if (config.c_disable_newu) return(2);
423 if (CC->logged_in) return(3);
424 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
426 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
428 len = cutuserkey(desired_name);
429 if (!CtdlGetUser(&CC->user, desired_name)) {
430 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
431 memset(&CC->user, 0, sizeof(struct ctdluser));
435 /* The desired account name is available. Create the account and log it in! */
436 if (create_user(desired_name, len, 1)) return(6);
438 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
439 CtdlSetPassword(new_password);
440 attach_openid(&CC->user, claimed_id);
441 populate_vcard_from_sreg(sreg_keys);
447 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
448 * Otherwise it returns nonzero.
450 int login_via_openid(StrBuf *claimed_id)
452 struct cdbdata *cdboi;
455 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
460 memcpy(&usernum, cdboi->ptr, sizeof(long));
463 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
464 /* Now become the user we just created */
465 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
470 memset(&CC->user, 0, sizeof(struct ctdluser));
478 /**************************************************************************/
480 /* Functions in this section handle OpenID protocol */
482 /**************************************************************************/
486 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
488 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
492 const char *href_start = NULL;
493 const char *href_end = NULL;
494 const char *link_tag_start = NULL;
495 const char *link_tag_end = NULL;
496 const char *rel_start = NULL;
497 const char *rel_end = NULL;
499 if (!target_buf) return;
501 if (!source_buf) return;
503 ptr = ChrPtr(source_buf);
505 FlushStrBuf(target_buf);
506 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
508 link_tag_start = ptr;
509 link_tag_end = strchr(ptr, '>');
510 if (link_tag_end == NULL)
512 for (i=0; i < 1; i++ ){
513 rel_start = cbmstrcasestr(link_tag_start, "rel=");
514 if ((rel_start == NULL) ||
515 (rel_start > link_tag_end))
518 rel_start = strchr(rel_start, '\"');
519 if ((rel_start == NULL) ||
520 (rel_start > link_tag_end))
523 rel_end = strchr(rel_start, '\"');
524 if ((rel_end == NULL) ||
525 (rel_end == rel_start) ||
526 (rel_end >= link_tag_end) )
528 if (strncasecmp(rel, rel_start, repllen)!= 0)
529 continue; /* didn't match? never mind... */
531 href_start = cbmstrcasestr(link_tag_start, "href=");
532 if ((href_start == NULL) ||
533 (href_start >= link_tag_end))
535 href_start = strchr(href_start, '\"');
536 if ((href_start == NULL) |
537 (href_start >= link_tag_end))
540 href_end = strchr(href_start, '\"');
541 if ((href_end == NULL) ||
542 (href_end == href_start) ||
543 (href_start >= link_tag_end))
545 StrBufPlain(target_buf, href_start, href_end - href_start);
553 * Wrapper for curl_easy_init() that includes the options common to all calls
554 * used in this module.
556 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
559 curl = curl_easy_init();
564 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
565 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
568 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
570 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
571 #ifdef CURLOPT_HTTP_CONTENT_DECODING
572 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
573 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
575 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
576 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
579 (!IsEmptyStr(config.c_ip_addr))
580 && (strcmp(config.c_ip_addr, "*"))
581 && (strcmp(config.c_ip_addr, "::"))
582 && (strcmp(config.c_ip_addr, "0.0.0.0"))
584 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
595 int current_service_priority;
596 int selected_service_priority;
597 StrBuf *current_service_uri;
598 StrBuf *selected_service_uri;
599 int current_service_is_oid2auth;
603 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
604 struct xrds *xrds = (struct xrds *) data;
607 ++xrds->nesting_level;
609 if (!strcasecmp(supplied_el, "XRD")) {
613 else if (!strcasecmp(supplied_el, "service")) {
614 xrds->current_service_priority = 0;
615 xrds->current_service_is_oid2auth = 0;
616 for (i=0; attr[i] != NULL; i+=2) {
617 if (!strcasecmp(attr[i], "priority")) {
618 xrds->current_service_priority = atoi(attr[i+1]);
623 FlushStrBuf(xrds->CharData);
627 void xrds_xml_end(void *data, const char *supplied_el) {
628 struct xrds *xrds = (struct xrds *) data;
630 --xrds->nesting_level;
632 if (!strcasecmp(supplied_el, "XRD")) {
636 else if (!strcasecmp(supplied_el, "type")) {
638 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/server"))
640 xrds->current_service_is_oid2auth = 1;
644 else if (!strcasecmp(supplied_el, "uri")) {
646 FlushStrBuf(xrds->current_service_uri);
647 StrBufAppendBuf(xrds->current_service_uri, xrds->CharData, 0);
651 else if (!strcasecmp(supplied_el, "service")) {
653 && (xrds->current_service_priority < xrds->selected_service_priority)
654 && (xrds->current_service_is_oid2auth)
656 xrds->selected_service_priority = xrds->current_service_priority;
657 FlushStrBuf(xrds->selected_service_uri);
658 StrBufAppendBuf(xrds->selected_service_uri, xrds->current_service_uri, 0);
663 FlushStrBuf(xrds->CharData);
667 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
668 struct xrds *xrds = (struct xrds *) data;
670 StrBufAppendBufPlain (xrds->CharData, s, len, 0);
675 * Parse an XRDS document.
676 * If an OpenID Provider URL is discovered, op_url to that value and return nonzero.
677 * If nothing useful happened, return 0.
679 int parse_xrds_document(StrBuf *ReplyBuf) {
680 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
682 int return_value = 0;
684 // syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf));
686 memset(&xrds, 0, sizeof (struct xrds));
687 xrds.selected_service_priority = INT_MAX;
688 xrds.CharData = NewStrBuf();
689 xrds.current_service_uri = NewStrBuf();
690 xrds.selected_service_uri = NewStrBuf();
691 XML_Parser xp = XML_ParserCreate(NULL);
693 XML_SetUserData(xp, &xrds);
694 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
695 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
696 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
697 XML_Parse(xp, "", 0, 1);
701 syslog(LOG_ALERT, "Cannot create XML parser");
704 if (xrds.selected_service_priority < INT_MAX) {
705 if (oiddata->op_url == NULL) {
706 oiddata->op_url = NewStrBuf();
708 FlushStrBuf(oiddata->op_url);
709 StrBufAppendBuf(oiddata->op_url, xrds.selected_service_uri, 0);
710 return_value = openid_disco_xrds;
713 FreeStrBuf(&xrds.CharData);
714 FreeStrBuf(&xrds.current_service_uri);
715 FreeStrBuf(&xrds.selected_service_uri);
717 return(return_value);
723 * Callback function for perform_openid2_discovery()
724 * We're interested in the X-XRDS-Location: header.
726 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
728 StrBuf **x_xrds_location = (StrBuf **) userdata;
730 memcpy(hdr, ptr, (size*nmemb));
733 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
734 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
735 StrBufTrim(*x_xrds_location);
738 return(size * nmemb);
742 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
744 * If Yadis fails, we then attempt HTML discovery using the same document.
746 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
747 * If fails, returns 0 and does nothing else.
749 int perform_openid2_discovery(StrBuf *YadisURL) {
750 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
752 StrBuf *ReplyBuf = NULL;
753 int return_value = 0;
756 char errmsg[1024] = "";
757 struct curl_slist *my_headers = NULL;
758 StrBuf *x_xrds_location = NULL;
760 if (!YadisURL) return(0);
761 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL));
762 if (StrLength(YadisURL) == 0) return(0);
764 ReplyBuf = NewStrBuf();
765 if (!ReplyBuf) return(0);
767 curl = ctdl_openid_curl_easy_init(errmsg);
768 if (!curl) return(0);
770 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
771 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
772 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
774 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
775 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
776 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
778 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
779 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
781 result = curl_easy_perform(curl);
783 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
785 curl_slist_free_all(my_headers);
786 curl_easy_cleanup(curl);
787 docbytes = StrLength(ReplyBuf);
790 * The response from the server will be one of:
792 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
793 * attribute, X-XRDS-Location,
795 /* FIXME handle this somehow */
798 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
799 * together with a document.
800 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
801 * a contenttype response-header specifying MIME media type,
802 * application/xrds+xml, or both.
804 * If the X-XRDS-Location header was delivered, we know about it at this point...
806 if ( (x_xrds_location)
807 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
809 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
810 return_value = perform_openid2_discovery(x_xrds_location);
811 FreeStrBuf(&x_xrds_location);
815 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
817 else if (docbytes >= 0) {
818 return_value = parse_xrds_document(ReplyBuf);
822 * Option 5: if all else fails, attempt HTML based discovery.
824 if (return_value == 0) {
825 syslog(LOG_DEBUG, "Attempting HTML discovery");
826 if (oiddata->op_url == NULL) {
827 oiddata->op_url = NewStrBuf();
829 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
830 if (StrLength(oiddata->op_url) > 0) {
831 return_value = openid_disco_html;
835 if (ReplyBuf != NULL) {
836 FreeStrBuf(&ReplyBuf);
838 return(return_value);
843 * Setup an OpenID authentication
845 void cmd_oids(char *argbuf) {
846 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
847 const char *Pos = NULL;
848 StrBuf *ArgBuf = NULL;
849 StrBuf *ReplyBuf = NULL;
850 StrBuf *return_to = NULL;
851 StrBuf *RedirectUrl = NULL;
852 ctdl_openid *oiddata;
853 int discovery_succeeded = 0;
855 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
857 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
858 if (oiddata == NULL) {
859 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
860 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
863 memset(oiddata, 0, sizeof(ctdl_openid));
864 CCC->openid_data = (void *) oiddata;
866 ArgBuf = NewStrBufPlain(argbuf, -1);
868 oiddata->verified = 0;
869 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
870 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
872 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
873 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
875 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
877 /********** OpenID 2.0 section 7.3 - Discovery **********/
879 /* Section 7.3.1 says we have to attempt XRI based discovery.
880 * No one is using this, no one is asking for it, no one wants it.
881 * So we're not even going to bother attempting this mode.
884 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
886 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
888 if (discovery_succeeded == 0) {
889 cprintf("%d There is no OpenID identity provider at this location.\n", ERROR);
894 * If we get to this point we are in possession of a valid OpenID Provider URL.
896 syslog(LOG_DEBUG, "OP URI '%s' discovered using method %d",
897 ChrPtr(oiddata->op_url),
901 /* We have to "normalize" our Claimed ID otherwise it will cause some OP's to barf */
902 if (cbmstrcasestr(ChrPtr(oiddata->claimed_id), "://") == NULL) {
903 StrBuf *cid = oiddata->claimed_id;
904 oiddata->claimed_id = NewStrBufPlain(HKEY("http://"));
905 StrBufAppendBuf(oiddata->claimed_id, cid, 0);
910 * OpenID 2.0 section 9: request authentication
911 * Assemble a URL to which the user-agent will be redirected.
914 RedirectUrl = NewStrBufDup(oiddata->op_url);
916 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.ns=http:%2F%2Fspecs.openid.net%2Fauth%2F2.0"), 0);
918 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.mode=checkid_setup"), 0);
920 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.claimed_id="), 0);
921 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
923 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.identity="), 0);
924 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
926 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
927 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
930 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
931 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
934 syslog(LOG_DEBUG, "\033[36m%s\033[0m", ChrPtr(RedirectUrl));
935 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
939 FreeStrBuf(&ReplyBuf);
940 FreeStrBuf(&return_to);
941 FreeStrBuf(&RedirectUrl);
946 * Finalize an OpenID authentication
948 void cmd_oidf(char *argbuf) {
953 HashList *keys = NULL;
954 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
956 if (oiddata == NULL) {
957 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
960 if (StrLength(oiddata->op_url) == 0){
961 cprintf("%d No OpenID Endpoint URL has been obtained.\n", ERROR + ILLEGAL_VALUE);
964 keys = NewHash(1, NULL);
966 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
969 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
971 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
972 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
974 len = sizeof(thiskey) - 1;
975 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
976 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
977 Put(keys, thiskey, len, strdup(thisdata), NULL);
980 /* Now that we have all of the parameters, we have to validate the signature against the server */
981 syslog(LOG_DEBUG, "Validating signature...");
985 struct curl_httppost *formpost = NULL;
986 struct curl_httppost *lastptr = NULL;
987 char errmsg[1024] = "";
988 char *o_assoc_handle = NULL;
990 char *o_signed = NULL;
991 int num_signed_values;
994 char k_o_keyname[128];
995 char *k_value = NULL;
998 curl_formadd(&formpost, &lastptr,
999 CURLFORM_COPYNAME, "openid.mode",
1000 CURLFORM_COPYCONTENTS, "check_authentication",
1002 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
1004 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
1005 curl_formadd(&formpost, &lastptr,
1006 CURLFORM_COPYNAME, "openid.assoc_handle",
1007 CURLFORM_COPYCONTENTS, o_assoc_handle,
1009 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
1012 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
1013 curl_formadd(&formpost, &lastptr,
1014 CURLFORM_COPYNAME, "openid.sig",
1015 CURLFORM_COPYCONTENTS, o_sig,
1017 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
1020 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
1021 curl_formadd(&formpost, &lastptr,
1022 CURLFORM_COPYNAME, "openid.signed",
1023 CURLFORM_COPYCONTENTS, o_signed,
1025 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
1027 num_signed_values = num_tokens(o_signed, ',');
1028 for (i=0; i<num_signed_values; ++i) {
1029 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
1030 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
1031 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
1032 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
1033 curl_formadd(&formpost, &lastptr,
1034 CURLFORM_COPYNAME, k_o_keyname,
1035 CURLFORM_COPYCONTENTS, k_value,
1037 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
1040 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
1047 ReplyBuf = NewStrBuf();
1049 curl = ctdl_openid_curl_easy_init(errmsg);
1050 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->op_url));
1051 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
1052 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1053 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1055 res = curl_easy_perform(curl);
1057 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1059 curl_easy_cleanup(curl);
1060 curl_formfree(formpost);
1063 syslog(LOG_DEBUG, "\033[36m --- VALIDATION REPLY ---\n%s\033[0m", ChrPtr(ReplyBuf));
1066 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
1067 oiddata->verified = 1;
1069 FreeStrBuf(&ReplyBuf);
1071 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1073 /* Respond to the client */
1075 if (oiddata->verified) {
1077 /* If we were already logged in, attach the OpenID to the user's account */
1078 if (CC->logged_in) {
1079 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1080 cprintf("attach\n");
1081 syslog(LOG_DEBUG, "OpenID attach succeeded");
1085 syslog(LOG_DEBUG, "OpenID attach failed");
1089 /* Otherwise, a user is attempting to log in using the verified OpenID */
1092 * Existing user who has claimed this OpenID?
1094 * Note: if you think that sending the password back over the wire is insecure,
1095 * check your assumptions. If someone has successfully asserted an OpenID that
1096 * is associated with the account, they already have password equivalency and can
1097 * login, so they could just as easily change the password, etc.
1099 if (login_via_openid(oiddata->claimed_id) == 0) {
1100 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1101 logged_in_response();
1102 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1106 * If this system does not allow self-service new user registration, the
1107 * remaining modes do not apply, so fail here and now.
1109 else if (config.c_disable_newu) {
1111 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1115 * New user whose OpenID is verified and Simple Registration Extension is in use?
1117 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1118 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1119 logged_in_response();
1120 syslog(LOG_DEBUG, "Successfully auto-created new user");
1124 * OpenID is verified, but the desired username either was not specified or
1125 * conflicts with an existing user. Manual account creation is required.
1128 char *desired_name = NULL;
1129 cprintf("verify_only\n");
1130 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1131 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1132 cprintf("%s\n", desired_name);
1137 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1146 if (oiddata->sreg_keys != NULL) {
1147 DeleteHash(&oiddata->sreg_keys);
1148 oiddata->sreg_keys = NULL;
1150 oiddata->sreg_keys = keys;
1155 /**************************************************************************/
1157 /* Functions in this section handle module initialization and shutdown */
1159 /**************************************************************************/
1164 CTDL_MODULE_INIT(openid_rp)
1167 curl_global_init(CURL_GLOBAL_ALL);
1169 /* Only enable the OpenID command set when native mode authentication is in use. */
1170 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1171 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1172 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1173 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1174 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1175 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1176 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1178 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1179 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1180 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1183 /* return our module name for the log */