2 * This is an implementation of OpenID 2.0 RELYING PARTY SUPPORT CURRENTLY B0RKEN AND BEING DEVEL0PZ0RED
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 {
62 void Free_ctdl_openid(ctdl_openid **FreeMe)
66 FreeStrBuf(&(*FreeMe)->claimed_id);
67 FreeStrBuf(&(*FreeMe)->server);
68 DeleteHash(&(*FreeMe)->sreg_keys);
75 * This cleanup function blows away the temporary memory used by this module.
77 void openid_cleanup_function(void) {
78 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
80 if (CCC->openid_data != NULL) {
81 syslog(LOG_DEBUG, "Clearing OpenID session state");
82 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
87 /**************************************************************************/
89 /* Functions in this section handle Citadel internal OpenID mapping stuff */
91 /**************************************************************************/
95 * The structure of an openid record *key* is:
97 * |--------------claimed_id-------------|
98 * (actual length of claimed id)
101 * The structure of an openid record *value* is:
103 * |-----user_number----|------------claimed_id---------------|
104 * (sizeof long) (actual length of claimed id)
111 * Attach an OpenID to a Citadel account
113 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
115 struct cdbdata *cdboi;
116 long fetched_usernum;
122 if (StrLength(claimed_id)==0) return(1);
124 /* Check to see if this OpenID is already in the database */
126 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
128 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
131 if (fetched_usernum == who->usernum) {
132 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
136 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
141 /* Not already in the database, so attach it now */
143 data_len = sizeof(long) + StrLength(claimed_id) + 1;
144 data = malloc(data_len);
146 memcpy(data, &who->usernum, sizeof(long));
147 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
149 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
152 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
153 who->fullname, who->usernum, ChrPtr(claimed_id));
154 CtdlAideMessage(buf, "OpenID claim");
155 syslog(LOG_INFO, "%s", buf);
162 * When a user is being deleted, we have to delete any OpenID associations
164 void openid_purge(struct ctdluser *usbuf) {
165 struct cdbdata *cdboi;
166 HashList *keys = NULL;
168 char *deleteme = NULL;
174 keys = NewHash(1, NULL);
177 cdb_rewind(CDB_OPENID);
178 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
179 if (cdboi->len > sizeof(long)) {
180 memcpy(&usernum, cdboi->ptr, sizeof(long));
181 if (usernum == usbuf->usernum) {
182 deleteme = strdup(cdboi->ptr + sizeof(long)),
183 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
189 /* Go through the hash list, deleting keys we stored in it */
191 HashPos = GetNewHashPos(keys, 0);
192 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
194 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
195 cdb_delete(CDB_OPENID, Value, strlen(Value));
196 /* note: don't free(Value) -- deleting the hash list will handle this for us */
198 DeleteHashPos(&HashPos);
204 * List the OpenIDs associated with the currently logged in account
206 void cmd_oidl(char *argbuf) {
207 struct cdbdata *cdboi;
210 if (CtdlAccessCheck(ac_logged_in)) return;
211 cdb_rewind(CDB_OPENID);
212 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
214 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
215 if (cdboi->len > sizeof(long)) {
216 memcpy(&usernum, cdboi->ptr, sizeof(long));
217 if (usernum == CC->user.usernum) {
218 cprintf("%s\n", cdboi->ptr + sizeof(long));
228 * List ALL OpenIDs in the database
230 void cmd_oida(char *argbuf) {
231 struct cdbdata *cdboi;
233 struct ctdluser usbuf;
235 if (CtdlAccessCheck(ac_aide)) return;
236 cdb_rewind(CDB_OPENID);
237 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
239 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
240 if (cdboi->len > sizeof(long)) {
241 memcpy(&usernum, cdboi->ptr, sizeof(long));
242 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
243 usbuf.fullname[0] = 0;
245 cprintf("%s|%ld|%s\n",
246 cdboi->ptr + sizeof(long),
258 * Attempt to register (populate the vCard) the currently-logged-in user
259 * using the data from Simple Registration Extension, if present.
261 void populate_vcard_from_sreg(HashList *sreg_keys) {
264 int pop = 0; /* number of fields populated */
266 char *postcode = NULL;
267 char *country = NULL;
269 if (!sreg_keys) return;
273 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
274 vcard_add_prop(v, "url;type=openid", data);
278 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
279 vcard_add_prop(v, "email;internet", data);
283 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
284 vcard_add_prop(v, "nickname", data);
288 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
290 vcard_add_prop(v, "fn", data);
291 vcard_fn_to_n(n, data, sizeof n);
292 vcard_add_prop(v, "n", n);
296 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
300 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
304 if (postcode || country) {
306 snprintf(adr, sizeof adr, ";;;;;%s;%s",
307 (postcode ? postcode : ""),
308 (country ? country : "")
310 vcard_add_prop(v, "adr", adr);
314 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
315 vcard_add_prop(v, "bday", data);
319 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
320 vcard_add_prop(v, "x-funambol-gender", data);
324 /* Only save the vCard if there is some useful data in it */
327 ser = vcard_serialize(v);
329 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
330 ser, strlen(ser)+1, &CC->user, 0, 0, 0
340 * Create a new user account, manually specifying the name, after successfully
341 * verifying an OpenID (which will of course be attached to the account)
343 void cmd_oidc(char *argbuf) {
344 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
347 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
351 if (!oiddata->verified) {
352 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
356 /* We can make the semantics of OIDC exactly the same as NEWU, simply
357 * by _calling_ cmd_newu() and letting it run. Very clever!
361 /* Now, if this logged us in, we have to attach the OpenID */
363 attach_openid(&CC->user, oiddata->claimed_id);
364 if (oiddata->sreg_keys != NULL) {
365 populate_vcard_from_sreg(oiddata->sreg_keys);
373 * Detach an OpenID from the currently logged in account
375 void cmd_oidd(char *argbuf) {
376 struct cdbdata *cdboi;
377 char id_to_detach[1024];
378 int this_is_mine = 0;
381 if (CtdlAccessCheck(ac_logged_in)) return;
382 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
383 if (IsEmptyStr(id_to_detach)) {
384 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
387 cdb_rewind(CDB_OPENID);
388 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
389 if (cdboi->len > sizeof(long)) {
390 memcpy(&usernum, cdboi->ptr, sizeof(long));
391 if (usernum == CC->user.usernum) {
399 cprintf("%d That OpenID was not found or not associated with your account.\n",
400 ERROR + ILLEGAL_VALUE);
404 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
405 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
411 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
413 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
415 char *desired_name = NULL;
416 char new_password[32];
419 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
420 if (config.c_disable_newu) return(2);
421 if (CC->logged_in) return(3);
422 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
424 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
426 len = cutuserkey(desired_name);
427 if (!CtdlGetUser(&CC->user, desired_name)) {
428 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
429 memset(&CC->user, 0, sizeof(struct ctdluser));
433 /* The desired account name is available. Create the account and log it in! */
434 if (create_user(desired_name, len, 1)) return(6);
436 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
437 CtdlSetPassword(new_password);
438 attach_openid(&CC->user, claimed_id);
439 populate_vcard_from_sreg(sreg_keys);
445 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
446 * Otherwise it returns nonzero.
448 int login_via_openid(StrBuf *claimed_id)
450 struct cdbdata *cdboi;
453 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
458 memcpy(&usernum, cdboi->ptr, sizeof(long));
461 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
462 /* Now become the user we just created */
463 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
468 memset(&CC->user, 0, sizeof(struct ctdluser));
476 /**************************************************************************/
478 /* Functions in this section handle OpenID protocol */
480 /**************************************************************************/
484 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
486 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
490 const char *href_start = NULL;
491 const char *href_end = NULL;
492 const char *link_tag_start = NULL;
493 const char *link_tag_end = NULL;
494 const char *rel_start = NULL;
495 const char *rel_end = NULL;
497 if (!target_buf) return;
499 if (!source_buf) return;
501 ptr = ChrPtr(source_buf);
503 FlushStrBuf(target_buf);
504 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
506 link_tag_start = ptr;
507 link_tag_end = strchr(ptr, '>');
508 if (link_tag_end == NULL)
510 for (i=0; i < 1; i++ ){
511 rel_start = cbmstrcasestr(link_tag_start, "rel=");
512 if ((rel_start == NULL) ||
513 (rel_start > link_tag_end))
516 rel_start = strchr(rel_start, '\"');
517 if ((rel_start == NULL) ||
518 (rel_start > link_tag_end))
521 rel_end = strchr(rel_start, '\"');
522 if ((rel_end == NULL) ||
523 (rel_end == rel_start) ||
524 (rel_end >= link_tag_end) )
526 if (strncasecmp(rel, rel_start, repllen)!= 0)
527 continue; /* didn't match? never mind... */
529 href_start = cbmstrcasestr(link_tag_start, "href=");
530 if ((href_start == NULL) ||
531 (href_start >= link_tag_end))
533 href_start = strchr(href_start, '\"');
534 if ((href_start == NULL) |
535 (href_start >= link_tag_end))
538 href_end = strchr(href_start, '\"');
539 if ((href_end == NULL) ||
540 (href_end == href_start) ||
541 (href_start >= link_tag_end))
543 StrBufPlain(target_buf, href_start, href_end - href_start);
551 * Wrapper for curl_easy_init() that includes the options common to all calls
552 * used in this module.
554 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
557 curl = curl_easy_init();
562 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
563 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
566 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
568 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
569 #ifdef CURLOPT_HTTP_CONTENT_DECODING
570 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
571 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
573 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
574 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
577 (!IsEmptyStr(config.c_ip_addr))
578 && (strcmp(config.c_ip_addr, "*"))
579 && (strcmp(config.c_ip_addr, "::"))
580 && (strcmp(config.c_ip_addr, "0.0.0.0"))
582 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
590 * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
592 int fetch_http(StrBuf *url, StrBuf **target_buf)
597 char *effective_url = NULL;
598 char errmsg[1024] = "";
600 if (StrLength(url) <=0 ) return(-1);
601 ReplyBuf = *target_buf = NewStrBuf ();
602 if (ReplyBuf == 0) return(-1);
604 curl = ctdl_openid_curl_easy_init(errmsg);
605 if (!curl) return(-1);
607 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(url));
608 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
609 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
611 result = curl_easy_perform(curl);
613 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
615 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
616 StrBufPlain(url, effective_url, -1);
618 curl_easy_cleanup(curl);
619 return StrLength(ReplyBuf);
627 int current_service_priority;
628 int selected_service_priority; /* more here later */
632 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
633 struct xrds *xrds = (struct xrds *) data;
636 ++xrds->nesting_level;
638 if (!strcasecmp(supplied_el, "XRD")) {
640 syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***");
643 else if (!strcasecmp(supplied_el, "service")) {
644 xrds->current_service_priority = 0;
645 for (i=0; attr[i] != NULL; i+=2) {
646 if (!strcasecmp(attr[i], "priority")) {
647 xrds->current_service_priority = atoi(attr[i+1]);
654 void xrds_xml_end(void *data, const char *supplied_el) {
655 struct xrds *xrds = (struct xrds *) data;
657 --xrds->nesting_level;
659 if (!strcasecmp(supplied_el, "XRD")) {
661 syslog(LOG_DEBUG, "*** XRD CONTAINER END ***");
664 else if (!strcasecmp(supplied_el, "service")) {
665 /* this is where we should evaluate the service and do stuff */
666 xrds->current_service_priority = 0;
671 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
672 struct xrds *xrds = (struct xrds *) data;
674 if (xrds) ; /* this is only here to silence the warning for now */
676 /* StrBufAppendBufPlain (xrds->CData, s, len, 0); */
681 * Parse an XRDS document.
682 * If OpenID stuff is discovered, populate FIXME something and return nonzero
683 * If nothing useful happened, return 0.
685 int parse_xrds_document(StrBuf *ReplyBuf) {
688 syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf));
690 memset(&xrds, 0, sizeof (struct xrds));
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 return(0); /* FIXME return nonzero if something wonderful happened */
710 * Callback function for perform_openid2_discovery()
711 * We're interested in the X-XRDS-Location: header.
713 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
715 StrBuf **x_xrds_location = (StrBuf **) userdata;
717 memcpy(hdr, ptr, (size*nmemb));
720 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
721 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
722 StrBufTrim(*x_xrds_location);
725 return(size * nmemb);
730 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
732 * If Yadis fails, we then attempt HTML discovery using the same document.
734 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
735 * If fails, returns 0 and does nothing else.
737 int perform_openid2_discovery(StrBuf *YadisURL) {
739 StrBuf *ReplyBuf = NULL;
740 int return_value = 0;
743 char errmsg[1024] = "";
744 struct curl_slist *my_headers = NULL;
745 StrBuf *x_xrds_location = NULL;
747 if (YadisURL == NULL) return(0);
748 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL));
749 if (StrLength(YadisURL) == 0) return(0);
751 ReplyBuf = NewStrBuf ();
752 if (ReplyBuf == 0) return(0);
754 curl = ctdl_openid_curl_easy_init(errmsg);
755 if (!curl) return(0);
757 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
758 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
759 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
761 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
762 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
763 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
765 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
766 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
768 result = curl_easy_perform(curl);
770 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
772 curl_slist_free_all(my_headers);
773 curl_easy_cleanup(curl);
774 docbytes = StrLength(ReplyBuf);
777 * The response from the server will be one of:
779 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
780 * attribute, X-XRDS-Location,
782 /* FIXME handle this somehow */
785 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
786 * together with a document.
787 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
788 * a contenttype response-header specifying MIME media type,
789 * application/xrds+xml, or both.
791 * If the X-XRDS-Location header was delivered, we know about it at this point...
793 if ( (x_xrds_location)
794 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
796 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
797 return_value = perform_openid2_discovery(x_xrds_location);
798 FreeStrBuf(&x_xrds_location);
802 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
804 else if (docbytes >= 0) {
805 return_value = parse_xrds_document(ReplyBuf);
809 * Option 5: if all else fails, attempt HTML based discovery.
811 if (return_value == 0) {
812 syslog(LOG_DEBUG, "Attempting HTML discovery");
813 StrBuf *foo = NewStrBuf();
814 extract_link(foo, HKEY("openid2.provider"), ReplyBuf);
815 if (StrLength(foo) > 0) {
816 syslog(LOG_DEBUG, "\033[31mHTML DISCO PROVIDER: %s\033[0m", ChrPtr(foo));
821 if (ReplyBuf != NULL) {
822 FreeStrBuf(&ReplyBuf);
824 return(return_value);
829 * Setup an OpenID authentication
831 void cmd_oids(char *argbuf) {
832 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
833 const char *Pos = NULL;
834 StrBuf *ArgBuf = NULL;
835 StrBuf *ReplyBuf = NULL;
836 StrBuf *return_to = NULL;
837 StrBuf *trust_root = NULL;
838 StrBuf *openid_delegate = NULL;
839 StrBuf *RedirectUrl = NULL;
840 ctdl_openid *oiddata;
841 int discovery_succeeded = 0;
843 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
845 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
846 if (oiddata == NULL) {
847 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
850 memset(oiddata, 0, sizeof(ctdl_openid));
851 CCC->openid_data = (void *) oiddata;
853 ArgBuf = NewStrBufPlain(argbuf, -1);
855 oiddata->verified = 0;
856 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
857 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
858 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
860 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
861 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
862 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
864 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
867 /********** OpenID 2.0 section 7.3 - Discovery **********/
869 /* Section 7.3.1 says we have to attempt XRI based discovery.
870 * No one is using this, no one is asking for it, no one wants it.
871 * So we're not even going to bother attempting this mode.
874 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
876 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
880 /************ OPENID 1.1 **********/
882 if ( (fetch_http(oiddata->claimed_id, &ReplyBuf) > 0)
883 && (StrLength(ReplyBuf) > 0)
885 openid_delegate = NewStrBuf();
886 oiddata->server = NewStrBuf();
887 extract_link(oiddata->server, HKEY("openid.server"), ReplyBuf);
888 extract_link(openid_delegate, HKEY("openid.delegate"), ReplyBuf);
890 if (StrLength(oiddata->server) == 0) {
891 cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
893 FreeStrBuf(&ReplyBuf);
894 FreeStrBuf(&return_to);
895 FreeStrBuf(&trust_root);
896 FreeStrBuf(&openid_delegate);
897 FreeStrBuf(&RedirectUrl);
901 /* Empty delegate is legal; we just use the openid_url instead */
902 if (StrLength(openid_delegate) == 0) {
903 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
906 /* Assemble a URL to which the user-agent will be redirected. */
908 RedirectUrl = NewStrBufDup(oiddata->server);
910 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup"
911 "&openid.identity="), 0);
912 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
914 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
915 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
917 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
918 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
920 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
921 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
923 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
926 FreeStrBuf(&ReplyBuf);
927 FreeStrBuf(&return_to);
928 FreeStrBuf(&trust_root);
929 FreeStrBuf(&openid_delegate);
930 FreeStrBuf(&RedirectUrl);
936 FreeStrBuf(&ReplyBuf);
937 FreeStrBuf(&return_to);
938 FreeStrBuf(&trust_root);
939 FreeStrBuf(&openid_delegate);
940 FreeStrBuf(&RedirectUrl);
942 cprintf("%d Unable to fetch OpenID URL\n", ERROR);
950 * Finalize an OpenID authentication
952 void cmd_oidf(char *argbuf) {
957 HashList *keys = NULL;
958 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
960 if (oiddata == NULL) {
961 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
964 if (StrLength(oiddata->server) == 0){
965 cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE);
968 keys = NewHash(1, NULL);
970 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
973 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
975 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
976 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
978 len = sizeof(thiskey) - 1;
979 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
980 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
981 Put(keys, thiskey, len, strdup(thisdata), NULL);
985 /* Now that we have all of the parameters, we have to validate the signature against the server */
986 syslog(LOG_DEBUG, "About to validate the signature...");
990 struct curl_httppost *formpost = NULL;
991 struct curl_httppost *lastptr = NULL;
992 char errmsg[1024] = "";
993 char *o_assoc_handle = NULL;
995 char *o_signed = NULL;
996 int num_signed_values;
999 char k_o_keyname[128];
1000 char *k_value = NULL;
1003 curl_formadd(&formpost, &lastptr,
1004 CURLFORM_COPYNAME, "openid.mode",
1005 CURLFORM_COPYCONTENTS, "check_authentication",
1007 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
1009 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
1010 curl_formadd(&formpost, &lastptr,
1011 CURLFORM_COPYNAME, "openid.assoc_handle",
1012 CURLFORM_COPYCONTENTS, o_assoc_handle,
1014 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
1017 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
1018 curl_formadd(&formpost, &lastptr,
1019 CURLFORM_COPYNAME, "openid.sig",
1020 CURLFORM_COPYCONTENTS, o_sig,
1022 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
1025 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
1026 curl_formadd(&formpost, &lastptr,
1027 CURLFORM_COPYNAME, "openid.signed",
1028 CURLFORM_COPYCONTENTS, o_signed,
1030 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
1032 num_signed_values = num_tokens(o_signed, ',');
1033 for (i=0; i<num_signed_values; ++i) {
1034 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
1035 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
1036 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
1037 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
1038 curl_formadd(&formpost, &lastptr,
1039 CURLFORM_COPYNAME, k_o_keyname,
1040 CURLFORM_COPYCONTENTS, k_value,
1042 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
1045 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
1052 ReplyBuf = NewStrBuf();
1054 curl = ctdl_openid_curl_easy_init(errmsg);
1055 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->server));
1056 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
1057 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1058 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1060 res = curl_easy_perform(curl);
1062 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1064 curl_easy_cleanup(curl);
1065 curl_formfree(formpost);
1067 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
1068 oiddata->verified = 1;
1070 FreeStrBuf(&ReplyBuf);
1072 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1074 /* Respond to the client */
1076 if (oiddata->verified) {
1078 /* If we were already logged in, attach the OpenID to the user's account */
1079 if (CC->logged_in) {
1080 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1081 cprintf("attach\n");
1082 syslog(LOG_DEBUG, "OpenID attach succeeded");
1086 syslog(LOG_DEBUG, "OpenID attach failed");
1090 /* Otherwise, a user is attempting to log in using the verified OpenID */
1093 * Existing user who has claimed this OpenID?
1095 * Note: if you think that sending the password back over the wire is insecure,
1096 * check your assumptions. If someone has successfully asserted an OpenID that
1097 * is associated with the account, they already have password equivalency and can
1098 * login, so they could just as easily change the password, etc.
1100 if (login_via_openid(oiddata->claimed_id) == 0) {
1101 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1102 logged_in_response();
1103 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1107 * If this system does not allow self-service new user registration, the
1108 * remaining modes do not apply, so fail here and now.
1110 else if (config.c_disable_newu) {
1112 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1116 * New user whose OpenID is verified and Simple Registration Extension is in use?
1118 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1119 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1120 logged_in_response();
1121 syslog(LOG_DEBUG, "Successfully auto-created new user");
1125 * OpenID is verified, but the desired username either was not specified or
1126 * conflicts with an existing user. Manual account creation is required.
1129 char *desired_name = NULL;
1130 cprintf("verify_only\n");
1131 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1132 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1133 cprintf("%s\n", desired_name);
1138 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1147 if (oiddata->sreg_keys != NULL) {
1148 DeleteHash(&oiddata->sreg_keys);
1149 oiddata->sreg_keys = NULL;
1151 oiddata->sreg_keys = keys;
1156 /**************************************************************************/
1158 /* Functions in this section handle module initialization and shutdown */
1160 /**************************************************************************/
1165 CTDL_MODULE_INIT(openid_rp)
1168 curl_global_init(CURL_GLOBAL_ALL);
1170 /* Only enable the OpenID command set when native mode authentication is in use. */
1171 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1172 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1173 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1174 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1175 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1176 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1177 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1179 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1180 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1181 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1184 /* return our module name for the log */