2 * This is an implementation of OpenID 2.0 relying party support in stateless mode.
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 {
52 StrBuf *op_url; /* OpenID Provider Endpoint URL */
53 StrBuf *claimed_id; /* Claimed Identifier */
65 void Free_ctdl_openid(ctdl_openid **FreeMe)
67 if (*FreeMe == NULL) {
70 FreeStrBuf(&(*FreeMe)->op_url);
71 FreeStrBuf(&(*FreeMe)->claimed_id);
72 DeleteHash(&(*FreeMe)->sreg_keys);
79 * This cleanup function blows away the temporary memory used by this module.
81 void openid_cleanup_function(void) {
82 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
84 if (CCC->openid_data != NULL) {
85 syslog(LOG_DEBUG, "Clearing OpenID session state");
86 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
91 /**************************************************************************/
93 /* Functions in this section handle Citadel internal OpenID mapping stuff */
95 /**************************************************************************/
99 * The structure of an openid record *key* is:
101 * |--------------claimed_id-------------|
102 * (actual length of claimed id)
105 * The structure of an openid record *value* is:
107 * |-----user_number----|------------claimed_id---------------|
108 * (sizeof long) (actual length of claimed id)
115 * Attach an OpenID to a Citadel account
117 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
119 struct cdbdata *cdboi;
120 long fetched_usernum;
126 if (StrLength(claimed_id)==0) return(1);
128 /* Check to see if this OpenID is already in the database */
130 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
132 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
135 if (fetched_usernum == who->usernum) {
136 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
140 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
145 /* Not already in the database, so attach it now */
147 data_len = sizeof(long) + StrLength(claimed_id) + 1;
148 data = malloc(data_len);
150 memcpy(data, &who->usernum, sizeof(long));
151 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
153 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
156 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
157 who->fullname, who->usernum, ChrPtr(claimed_id));
158 CtdlAideMessage(buf, "OpenID claim");
159 syslog(LOG_INFO, "%s", buf);
166 * When a user is being deleted, we have to delete any OpenID associations
168 void openid_purge(struct ctdluser *usbuf) {
169 struct cdbdata *cdboi;
170 HashList *keys = NULL;
172 char *deleteme = NULL;
178 keys = NewHash(1, NULL);
181 cdb_rewind(CDB_OPENID);
182 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
183 if (cdboi->len > sizeof(long)) {
184 memcpy(&usernum, cdboi->ptr, sizeof(long));
185 if (usernum == usbuf->usernum) {
186 deleteme = strdup(cdboi->ptr + sizeof(long)),
187 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
193 /* Go through the hash list, deleting keys we stored in it */
195 HashPos = GetNewHashPos(keys, 0);
196 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
198 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
199 cdb_delete(CDB_OPENID, Value, strlen(Value));
200 /* note: don't free(Value) -- deleting the hash list will handle this for us */
202 DeleteHashPos(&HashPos);
208 * List the OpenIDs associated with the currently logged in account
210 void cmd_oidl(char *argbuf) {
211 struct cdbdata *cdboi;
214 if (CtdlAccessCheck(ac_logged_in)) return;
215 cdb_rewind(CDB_OPENID);
216 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
218 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
219 if (cdboi->len > sizeof(long)) {
220 memcpy(&usernum, cdboi->ptr, sizeof(long));
221 if (usernum == CC->user.usernum) {
222 cprintf("%s\n", cdboi->ptr + sizeof(long));
232 * List ALL OpenIDs in the database
234 void cmd_oida(char *argbuf) {
235 struct cdbdata *cdboi;
237 struct ctdluser usbuf;
239 if (CtdlAccessCheck(ac_aide)) return;
240 cdb_rewind(CDB_OPENID);
241 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
243 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
244 if (cdboi->len > sizeof(long)) {
245 memcpy(&usernum, cdboi->ptr, sizeof(long));
246 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
247 usbuf.fullname[0] = 0;
249 cprintf("%s|%ld|%s\n",
250 cdboi->ptr + sizeof(long),
262 * Attempt to register (populate the vCard) the currently-logged-in user
263 * using the data from Simple Registration Extension, if present.
265 void populate_vcard_from_sreg(HashList *sreg_keys) {
268 int pop = 0; /* number of fields populated */
270 char *postcode = NULL;
271 char *country = NULL;
273 if (!sreg_keys) return;
277 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
278 vcard_add_prop(v, "url;type=openid", data);
282 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
283 vcard_add_prop(v, "email;internet", data);
287 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
288 vcard_add_prop(v, "nickname", data);
292 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
294 vcard_add_prop(v, "fn", data);
295 vcard_fn_to_n(n, data, sizeof n);
296 vcard_add_prop(v, "n", n);
300 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
304 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
308 if (postcode || country) {
310 snprintf(adr, sizeof adr, ";;;;;%s;%s",
311 (postcode ? postcode : ""),
312 (country ? country : "")
314 vcard_add_prop(v, "adr", adr);
318 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
319 vcard_add_prop(v, "bday", data);
323 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
324 vcard_add_prop(v, "x-funambol-gender", data);
328 /* Only save the vCard if there is some useful data in it */
331 ser = vcard_serialize(v);
333 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
334 ser, strlen(ser)+1, &CC->user, 0, 0, 0
345 * Create a new user account, manually specifying the name, after successfully
346 * verifying an OpenID (which will of course be attached to the account)
348 void cmd_oidc(char *argbuf) {
349 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
351 if ( (!oiddata) || (!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);
410 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
412 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
414 char *desired_name = NULL;
415 char new_password[32];
418 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
419 if (config.c_disable_newu) return(2);
420 if (CC->logged_in) return(3);
421 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
423 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
425 len = cutuserkey(desired_name);
426 if (!CtdlGetUser(&CC->user, desired_name)) {
427 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
428 memset(&CC->user, 0, sizeof(struct ctdluser));
432 /* The desired account name is available. Create the account and log it in! */
433 if (create_user(desired_name, len, 1)) return(6);
435 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
436 CtdlSetPassword(new_password);
437 attach_openid(&CC->user, claimed_id);
438 /* populate_vcard_from_sreg(sreg_keys); */
444 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
445 * Otherwise it returns nonzero.
447 int login_via_openid(StrBuf *claimed_id)
449 struct cdbdata *cdboi;
452 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
457 memcpy(&usernum, cdboi->ptr, sizeof(long));
460 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
461 /* Now become the user we just created */
462 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
467 memset(&CC->user, 0, sizeof(struct ctdluser));
475 /**************************************************************************/
477 /* Functions in this section handle OpenID protocol */
479 /**************************************************************************/
483 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
485 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
489 const char *href_start = NULL;
490 const char *href_end = NULL;
491 const char *link_tag_start = NULL;
492 const char *link_tag_end = NULL;
493 const char *rel_start = NULL;
494 const char *rel_end = NULL;
496 if (!target_buf) return;
498 if (!source_buf) return;
500 ptr = ChrPtr(source_buf);
502 FlushStrBuf(target_buf);
503 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
505 link_tag_start = ptr;
506 link_tag_end = strchr(ptr, '>');
507 if (link_tag_end == NULL)
509 for (i=0; i < 1; i++ ){
510 rel_start = cbmstrcasestr(link_tag_start, "rel=");
511 if ((rel_start == NULL) ||
512 (rel_start > link_tag_end))
515 rel_start = strchr(rel_start, '\"');
516 if ((rel_start == NULL) ||
517 (rel_start > link_tag_end))
520 rel_end = strchr(rel_start, '\"');
521 if ((rel_end == NULL) ||
522 (rel_end == rel_start) ||
523 (rel_end >= link_tag_end) )
525 if (strncasecmp(rel, rel_start, repllen)!= 0)
526 continue; /* didn't match? never mind... */
528 href_start = cbmstrcasestr(link_tag_start, "href=");
529 if ((href_start == NULL) ||
530 (href_start >= link_tag_end))
532 href_start = strchr(href_start, '\"');
533 if ((href_start == NULL) |
534 (href_start >= link_tag_end))
537 href_end = strchr(href_start, '\"');
538 if ((href_end == NULL) ||
539 (href_end == href_start) ||
540 (href_start >= link_tag_end))
542 StrBufPlain(target_buf, href_start, href_end - href_start);
550 * Wrapper for curl_easy_init() that includes the options common to all calls
551 * used in this module.
553 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
556 curl = curl_easy_init();
561 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
562 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
565 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
567 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
568 #ifdef CURLOPT_HTTP_CONTENT_DECODING
569 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
570 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
572 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
573 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
576 (!IsEmptyStr(config.c_ip_addr))
577 && (strcmp(config.c_ip_addr, "*"))
578 && (strcmp(config.c_ip_addr, "::"))
579 && (strcmp(config.c_ip_addr, "0.0.0.0"))
581 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
592 int current_service_priority;
593 int selected_service_priority;
594 StrBuf *current_service_uri;
595 StrBuf *selected_service_uri;
596 int current_service_is_oid2auth;
600 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
601 struct xrds *xrds = (struct xrds *) data;
604 ++xrds->nesting_level;
606 if (!strcasecmp(supplied_el, "XRD")) {
610 else if (!strcasecmp(supplied_el, "service")) {
611 xrds->current_service_priority = 0;
612 xrds->current_service_is_oid2auth = 0;
613 for (i=0; attr[i] != NULL; i+=2) {
614 if (!strcasecmp(attr[i], "priority")) {
615 xrds->current_service_priority = atoi(attr[i+1]);
620 FlushStrBuf(xrds->CharData);
624 void xrds_xml_end(void *data, const char *supplied_el) {
625 struct xrds *xrds = (struct xrds *) data;
627 --xrds->nesting_level;
629 if (!strcasecmp(supplied_el, "XRD")) {
633 else if (!strcasecmp(supplied_el, "type")) {
635 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/server"))
637 xrds->current_service_is_oid2auth = 1;
640 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/signon"))
642 xrds->current_service_is_oid2auth = 1;
643 /* FIXME in this case, the Claimed ID should be considered immutable */
647 else if (!strcasecmp(supplied_el, "uri")) {
649 FlushStrBuf(xrds->current_service_uri);
650 StrBufAppendBuf(xrds->current_service_uri, xrds->CharData, 0);
654 else if (!strcasecmp(supplied_el, "service")) {
656 && (xrds->current_service_priority < xrds->selected_service_priority)
657 && (xrds->current_service_is_oid2auth)
659 xrds->selected_service_priority = xrds->current_service_priority;
660 FlushStrBuf(xrds->selected_service_uri);
661 StrBufAppendBuf(xrds->selected_service_uri, xrds->current_service_uri, 0);
666 FlushStrBuf(xrds->CharData);
670 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
671 struct xrds *xrds = (struct xrds *) data;
673 StrBufAppendBufPlain (xrds->CharData, s, len, 0);
678 * Parse an XRDS document.
679 * If an OpenID Provider URL is discovered, op_url to that value and return nonzero.
680 * If nothing useful happened, return 0.
682 int parse_xrds_document(StrBuf *ReplyBuf) {
683 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
685 int return_value = 0;
687 /* syslog(LOG_DEBUG, "XRDS document:\n%s\n", ChrPtr(ReplyBuf)); */
689 memset(&xrds, 0, sizeof (struct xrds));
690 xrds.selected_service_priority = INT_MAX;
691 xrds.CharData = NewStrBuf();
692 xrds.current_service_uri = NewStrBuf();
693 xrds.selected_service_uri = NewStrBuf();
694 XML_Parser xp = XML_ParserCreate(NULL);
696 XML_SetUserData(xp, &xrds);
697 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
698 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
699 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
700 XML_Parse(xp, "", 0, 1);
704 syslog(LOG_ALERT, "Cannot create XML parser");
707 if (xrds.selected_service_priority < INT_MAX) {
708 if (oiddata->op_url == NULL) {
709 oiddata->op_url = NewStrBuf();
711 FlushStrBuf(oiddata->op_url);
712 StrBufAppendBuf(oiddata->op_url, xrds.selected_service_uri, 0);
713 return_value = openid_disco_xrds;
716 FreeStrBuf(&xrds.CharData);
717 FreeStrBuf(&xrds.current_service_uri);
718 FreeStrBuf(&xrds.selected_service_uri);
720 return(return_value);
726 * Callback function for perform_openid2_discovery()
727 * We're interested in the X-XRDS-Location: header.
729 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
731 StrBuf **x_xrds_location = (StrBuf **) userdata;
733 memcpy(hdr, ptr, (size*nmemb));
736 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
737 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
738 StrBufTrim(*x_xrds_location);
741 return(size * nmemb);
745 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
747 * If Yadis fails, we then attempt HTML discovery using the same document.
749 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
750 * If fails, returns 0 and does nothing else.
752 int perform_openid2_discovery(StrBuf *SuppliedURL) {
753 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
755 StrBuf *ReplyBuf = NULL;
756 int return_value = 0;
759 char errmsg[1024] = "";
760 struct curl_slist *my_headers = NULL;
761 StrBuf *x_xrds_location = NULL;
763 if (!SuppliedURL) return(0);
764 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(SuppliedURL));
765 if (StrLength(SuppliedURL) == 0) return(0);
767 ReplyBuf = NewStrBuf();
768 if (!ReplyBuf) return(0);
770 curl = ctdl_openid_curl_easy_init(errmsg);
771 if (!curl) return(0);
773 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(SuppliedURL));
774 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
775 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
777 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
778 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
779 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
781 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
782 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
784 result = curl_easy_perform(curl);
786 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
788 curl_slist_free_all(my_headers);
789 curl_easy_cleanup(curl);
790 docbytes = StrLength(ReplyBuf);
793 * The response from the server will be one of:
795 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
796 * attribute, X-XRDS-Location,
798 * Does any provider actually do this? If so then we will implement it in the future.
802 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
803 * together with a document.
804 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
805 * a contenttype response-header specifying MIME media type,
806 * application/xrds+xml, or both.
808 * If the X-XRDS-Location header was delivered, we know about it at this point...
810 if ( (x_xrds_location)
811 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(SuppliedURL)))
813 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
814 return_value = perform_openid2_discovery(x_xrds_location);
815 FreeStrBuf(&x_xrds_location);
819 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
821 if ( (return_value == 0) && (docbytes >= 0)) {
822 return_value = parse_xrds_document(ReplyBuf);
826 * Option 5: if all else fails, attempt HTML based discovery.
828 if ( (return_value == 0) && (docbytes >= 0)) {
829 if (oiddata->op_url == NULL) {
830 oiddata->op_url = NewStrBuf();
832 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
833 if (StrLength(oiddata->op_url) > 0) {
834 return_value = openid_disco_html;
838 if (ReplyBuf != NULL) {
839 FreeStrBuf(&ReplyBuf);
841 return(return_value);
846 * Setup an OpenID authentication
848 void cmd_oids(char *argbuf) {
849 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
850 const char *Pos = NULL;
851 StrBuf *ArgBuf = NULL;
852 StrBuf *ReplyBuf = NULL;
853 StrBuf *return_to = NULL;
854 StrBuf *RedirectUrl = NULL;
855 ctdl_openid *oiddata;
856 int discovery_succeeded = 0;
858 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
860 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
861 if (oiddata == NULL) {
862 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
863 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
866 memset(oiddata, 0, sizeof(ctdl_openid));
867 CCC->openid_data = (void *) oiddata;
869 ArgBuf = NewStrBufPlain(argbuf, -1);
871 oiddata->verified = 0;
872 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
873 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
875 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
876 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
878 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
880 /********** OpenID 2.0 section 7.3 - Discovery **********/
882 /* Section 7.3.1 says we have to attempt XRI based discovery.
883 * No one is using this, no one is asking for it, no one wants it.
884 * So we're not even going to bother attempting this mode.
887 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
889 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
891 if (discovery_succeeded == 0) {
892 cprintf("%d There is no OpenID identity provider at this location.\n", ERROR);
897 * If we get to this point we are in possession of a valid OpenID Provider URL.
899 syslog(LOG_DEBUG, "OP URI '%s' discovered using method %d",
900 ChrPtr(oiddata->op_url),
904 /* We have to "normalize" our Claimed ID otherwise it will cause some OP's to barf */
905 if (cbmstrcasestr(ChrPtr(oiddata->claimed_id), "://") == NULL) {
906 StrBuf *cid = oiddata->claimed_id;
907 oiddata->claimed_id = NewStrBufPlain(HKEY("http://"));
908 StrBufAppendBuf(oiddata->claimed_id, cid, 0);
913 * OpenID 2.0 section 9: request authentication
914 * Assemble a URL to which the user-agent will be redirected.
917 RedirectUrl = NewStrBufDup(oiddata->op_url);
919 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.ns="), 0);
920 StrBufUrlescAppend(RedirectUrl, NULL, "http://specs.openid.net/auth/2.0");
922 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.mode=checkid_setup"), 0);
924 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.claimed_id="), 0);
925 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
927 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.identity="), 0);
928 StrBufUrlescAppend(RedirectUrl, oiddata->claimed_id, NULL);
930 /* return_to completes the round trip */
931 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
932 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
934 /* Attribute Exchange
936 * http://openid.net/specs/openid-attribute-exchange-1_0.html
937 * http://code.google.com/apis/accounts/docs/OpenID.html#endpoint
938 * http://test-id.net/OP/AXFetch.aspx
941 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ns.ax="), 0);
942 StrBufUrlescAppend(RedirectUrl, NULL, "http://openid.net/srv/ax/1.0");
944 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.mode=fetch_request"), 0);
946 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.required=firstname,lastname,friendly,nickname"), 0);
948 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.firstname="), 0);
949 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/first");
951 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.lastname="), 0);
952 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/last");
954 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.friendly="), 0);
955 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/friendly");
957 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.ax.type.nickname="), 0);
958 StrBufUrlescAppend(RedirectUrl, NULL, "http://axschema.org/namePerson/nickname");
960 syslog(LOG_DEBUG, "OpenID: redirecting client to %s", ChrPtr(RedirectUrl));
961 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
965 FreeStrBuf(&ReplyBuf);
966 FreeStrBuf(&return_to);
967 FreeStrBuf(&RedirectUrl);
972 * Finalize an OpenID authentication
974 void cmd_oidf(char *argbuf) {
979 HashList *keys = NULL;
982 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
984 if (oiddata == NULL) {
985 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
988 if (StrLength(oiddata->op_url) == 0){
989 cprintf("%d No OpenID Endpoint URL has been obtained.\n", ERROR + ILLEGAL_VALUE);
992 keys = NewHash(1, NULL);
994 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
997 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
999 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
1000 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
1002 len = sizeof(thiskey) - 1;
1004 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
1005 Put(keys, thiskey, len, strdup(thisdata), NULL);
1008 /* Check to see if this is a correct response.
1009 * Start with verified=1 but then set it to 0 if anything looks wrong.
1011 oiddata->verified = 1;
1013 char *openid_ns = NULL;
1014 if ( (!GetHash(keys, "ns", 2, (void *) &openid_ns))
1015 || (strcasecmp(openid_ns, "http://specs.openid.net/auth/2.0"))
1017 syslog(LOG_DEBUG, "This is not an an OpenID assertion");
1018 oiddata->verified = 0;
1021 char *openid_mode = NULL;
1022 if ( (!GetHash(keys, "mode", 4, (void *) &openid_mode))
1023 || (strcasecmp(openid_mode, "id_res"))
1025 oiddata->verified = 0;
1028 char *openid_claimed_id = NULL;
1029 if (GetHash(keys, "claimed_id", 10, (void *) &openid_claimed_id)) {
1030 FreeStrBuf(&oiddata->claimed_id);
1031 oiddata->claimed_id = NewStrBufPlain(openid_claimed_id, -1);
1032 syslog(LOG_DEBUG, "Provider is asserting the Claimed ID '%s'", ChrPtr(oiddata->claimed_id));
1035 /* Validate the assertion against the server */
1036 syslog(LOG_DEBUG, "Validating...");
1040 struct curl_httppost *formpost = NULL;
1041 struct curl_httppost *lastptr = NULL;
1042 char errmsg[1024] = "";
1043 StrBuf *ReplyBuf = NewStrBuf();
1045 curl_formadd(&formpost, &lastptr,
1046 CURLFORM_COPYNAME, "openid.mode",
1047 CURLFORM_COPYCONTENTS, "check_authentication",
1051 HashPos *HashPos = GetNewHashPos(keys, 0);
1052 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value) != 0) {
1053 syslog(LOG_DEBUG, "%s = %s", Key, (char *)Value);
1054 if (strcasecmp(Key, "mode")) {
1055 char k_o_keyname[1024];
1056 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", (const char *)Key);
1057 curl_formadd(&formpost, &lastptr,
1058 CURLFORM_COPYNAME, k_o_keyname,
1059 CURLFORM_COPYCONTENTS, (char *)Value,
1065 curl = ctdl_openid_curl_easy_init(errmsg);
1066 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->op_url));
1067 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
1068 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1069 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1071 res = curl_easy_perform(curl);
1073 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1074 oiddata->verified = 0;
1076 curl_easy_cleanup(curl);
1077 curl_formfree(formpost);
1079 /* syslog(LOG_DEBUG, "Validation reply: \n%s", ChrPtr(ReplyBuf)); */
1080 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true") == NULL) {
1081 oiddata->verified = 0;
1083 FreeStrBuf(&ReplyBuf);
1085 syslog(LOG_DEBUG, "OpenID authentication %s", (oiddata->verified ? "succeeded" : "failed") );
1087 /* Respond to the client */
1089 if (oiddata->verified) {
1091 /* If we were already logged in, attach the OpenID to the user's account */
1092 if (CC->logged_in) {
1093 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1094 cprintf("attach\n");
1095 syslog(LOG_DEBUG, "OpenID attach succeeded");
1099 syslog(LOG_DEBUG, "OpenID attach failed");
1103 /* Otherwise, a user is attempting to log in using the verified OpenID */
1106 * Existing user who has claimed this OpenID?
1108 * Note: if you think that sending the password back over the wire is insecure,
1109 * check your assumptions. If someone has successfully asserted an OpenID that
1110 * is associated with the account, they already have password equivalency and can
1111 * login, so they could just as easily change the password, etc.
1113 if (login_via_openid(oiddata->claimed_id) == 0) {
1114 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1115 logged_in_response();
1116 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1120 * If this system does not allow self-service new user registration, the
1121 * remaining modes do not apply, so fail here and now.
1123 else if (config.c_disable_newu) {
1125 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1129 * New user whose OpenID is verified and Simple Registration Extension is in use?
1131 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1132 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1133 logged_in_response();
1134 syslog(LOG_DEBUG, "Successfully auto-created new user");
1138 * OpenID is verified, but the desired username either was not specified or
1139 * conflicts with an existing user. Manual account creation is required.
1142 char *desired_name = NULL;
1143 cprintf("verify_only\n");
1144 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1145 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1146 cprintf("%s\n", desired_name);
1151 syslog(LOG_DEBUG, "The desired display name is already taken.");
1160 if (oiddata->sreg_keys != NULL) {
1161 DeleteHash(&oiddata->sreg_keys);
1162 oiddata->sreg_keys = NULL;
1164 oiddata->sreg_keys = keys;
1169 /**************************************************************************/
1171 /* Functions in this section handle module initialization and shutdown */
1173 /**************************************************************************/
1178 CTDL_MODULE_INIT(openid_rp)
1181 curl_global_init(CURL_GLOBAL_ALL);
1183 /* Only enable the OpenID command set when native mode authentication is in use. */
1184 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1185 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1186 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1187 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1188 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1189 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1190 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1192 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1193 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1194 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1197 /* return our module name for the log */