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 */
70 void Free_ctdl_openid(ctdl_openid **FreeMe)
72 if (*FreeMe == NULL) {
75 FreeStrBuf(&(*FreeMe)->op_url);
76 FreeStrBuf(&(*FreeMe)->claimed_id);
77 DeleteHash(&(*FreeMe)->sreg_keys);
84 * This cleanup function blows away the temporary memory used by this module.
86 void openid_cleanup_function(void) {
87 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
89 if (CCC->openid_data != NULL) {
90 syslog(LOG_DEBUG, "Clearing OpenID session state");
91 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
96 /**************************************************************************/
98 /* Functions in this section handle Citadel internal OpenID mapping stuff */
100 /**************************************************************************/
104 * The structure of an openid record *key* is:
106 * |--------------claimed_id-------------|
107 * (actual length of claimed id)
110 * The structure of an openid record *value* is:
112 * |-----user_number----|------------claimed_id---------------|
113 * (sizeof long) (actual length of claimed id)
120 * Attach an OpenID to a Citadel account
122 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
124 struct cdbdata *cdboi;
125 long fetched_usernum;
131 if (StrLength(claimed_id)==0) return(1);
133 /* Check to see if this OpenID is already in the database */
135 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
137 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
140 if (fetched_usernum == who->usernum) {
141 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
145 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
150 /* Not already in the database, so attach it now */
152 data_len = sizeof(long) + StrLength(claimed_id) + 1;
153 data = malloc(data_len);
155 memcpy(data, &who->usernum, sizeof(long));
156 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
158 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
161 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
162 who->fullname, who->usernum, ChrPtr(claimed_id));
163 CtdlAideMessage(buf, "OpenID claim");
164 syslog(LOG_INFO, "%s", buf);
171 * When a user is being deleted, we have to delete any OpenID associations
173 void openid_purge(struct ctdluser *usbuf) {
174 struct cdbdata *cdboi;
175 HashList *keys = NULL;
177 char *deleteme = NULL;
183 keys = NewHash(1, NULL);
186 cdb_rewind(CDB_OPENID);
187 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
188 if (cdboi->len > sizeof(long)) {
189 memcpy(&usernum, cdboi->ptr, sizeof(long));
190 if (usernum == usbuf->usernum) {
191 deleteme = strdup(cdboi->ptr + sizeof(long)),
192 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
198 /* Go through the hash list, deleting keys we stored in it */
200 HashPos = GetNewHashPos(keys, 0);
201 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
203 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
204 cdb_delete(CDB_OPENID, Value, strlen(Value));
205 /* note: don't free(Value) -- deleting the hash list will handle this for us */
207 DeleteHashPos(&HashPos);
213 * List the OpenIDs associated with the currently logged in account
215 void cmd_oidl(char *argbuf) {
216 struct cdbdata *cdboi;
219 if (CtdlAccessCheck(ac_logged_in)) return;
220 cdb_rewind(CDB_OPENID);
221 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
223 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
224 if (cdboi->len > sizeof(long)) {
225 memcpy(&usernum, cdboi->ptr, sizeof(long));
226 if (usernum == CC->user.usernum) {
227 cprintf("%s\n", cdboi->ptr + sizeof(long));
237 * List ALL OpenIDs in the database
239 void cmd_oida(char *argbuf) {
240 struct cdbdata *cdboi;
242 struct ctdluser usbuf;
244 if (CtdlAccessCheck(ac_aide)) return;
245 cdb_rewind(CDB_OPENID);
246 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
248 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
249 if (cdboi->len > sizeof(long)) {
250 memcpy(&usernum, cdboi->ptr, sizeof(long));
251 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
252 usbuf.fullname[0] = 0;
254 cprintf("%s|%ld|%s\n",
255 cdboi->ptr + sizeof(long),
267 * Attempt to register (populate the vCard) the currently-logged-in user
268 * using the data from Simple Registration Extension, if present.
270 void populate_vcard_from_sreg(HashList *sreg_keys) {
273 int pop = 0; /* number of fields populated */
275 char *postcode = NULL;
276 char *country = NULL;
278 if (!sreg_keys) return;
282 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
283 vcard_add_prop(v, "url;type=openid", data);
287 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
288 vcard_add_prop(v, "email;internet", data);
292 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
293 vcard_add_prop(v, "nickname", data);
297 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
299 vcard_add_prop(v, "fn", data);
300 vcard_fn_to_n(n, data, sizeof n);
301 vcard_add_prop(v, "n", n);
305 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
309 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
313 if (postcode || country) {
315 snprintf(adr, sizeof adr, ";;;;;%s;%s",
316 (postcode ? postcode : ""),
317 (country ? country : "")
319 vcard_add_prop(v, "adr", adr);
323 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
324 vcard_add_prop(v, "bday", data);
328 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
329 vcard_add_prop(v, "x-funambol-gender", data);
333 /* Only save the vCard if there is some useful data in it */
336 ser = vcard_serialize(v);
338 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
339 ser, strlen(ser)+1, &CC->user, 0, 0, 0
349 * Create a new user account, manually specifying the name, after successfully
350 * verifying an OpenID (which will of course be attached to the account)
352 void cmd_oidc(char *argbuf) {
353 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
356 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
360 if (!oiddata->verified) {
361 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
365 /* We can make the semantics of OIDC exactly the same as NEWU, simply
366 * by _calling_ cmd_newu() and letting it run. Very clever!
370 /* Now, if this logged us in, we have to attach the OpenID */
372 attach_openid(&CC->user, oiddata->claimed_id);
373 if (oiddata->sreg_keys != NULL) {
374 populate_vcard_from_sreg(oiddata->sreg_keys);
382 * Detach an OpenID from the currently logged in account
384 void cmd_oidd(char *argbuf) {
385 struct cdbdata *cdboi;
386 char id_to_detach[1024];
387 int this_is_mine = 0;
390 if (CtdlAccessCheck(ac_logged_in)) return;
391 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
392 if (IsEmptyStr(id_to_detach)) {
393 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
396 cdb_rewind(CDB_OPENID);
397 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
398 if (cdboi->len > sizeof(long)) {
399 memcpy(&usernum, cdboi->ptr, sizeof(long));
400 if (usernum == CC->user.usernum) {
408 cprintf("%d That OpenID was not found or not associated with your account.\n",
409 ERROR + ILLEGAL_VALUE);
413 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
414 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
420 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
422 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
424 char *desired_name = NULL;
425 char new_password[32];
428 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
429 if (config.c_disable_newu) return(2);
430 if (CC->logged_in) return(3);
431 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
433 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
435 len = cutuserkey(desired_name);
436 if (!CtdlGetUser(&CC->user, desired_name)) {
437 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
438 memset(&CC->user, 0, sizeof(struct ctdluser));
442 /* The desired account name is available. Create the account and log it in! */
443 if (create_user(desired_name, len, 1)) return(6);
445 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
446 CtdlSetPassword(new_password);
447 attach_openid(&CC->user, claimed_id);
448 populate_vcard_from_sreg(sreg_keys);
454 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
455 * Otherwise it returns nonzero.
457 int login_via_openid(StrBuf *claimed_id)
459 struct cdbdata *cdboi;
462 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
467 memcpy(&usernum, cdboi->ptr, sizeof(long));
470 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
471 /* Now become the user we just created */
472 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
477 memset(&CC->user, 0, sizeof(struct ctdluser));
485 /**************************************************************************/
487 /* Functions in this section handle OpenID protocol */
489 /**************************************************************************/
493 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
495 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
499 const char *href_start = NULL;
500 const char *href_end = NULL;
501 const char *link_tag_start = NULL;
502 const char *link_tag_end = NULL;
503 const char *rel_start = NULL;
504 const char *rel_end = NULL;
506 if (!target_buf) return;
508 if (!source_buf) return;
510 ptr = ChrPtr(source_buf);
512 FlushStrBuf(target_buf);
513 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
515 link_tag_start = ptr;
516 link_tag_end = strchr(ptr, '>');
517 if (link_tag_end == NULL)
519 for (i=0; i < 1; i++ ){
520 rel_start = cbmstrcasestr(link_tag_start, "rel=");
521 if ((rel_start == NULL) ||
522 (rel_start > link_tag_end))
525 rel_start = strchr(rel_start, '\"');
526 if ((rel_start == NULL) ||
527 (rel_start > link_tag_end))
530 rel_end = strchr(rel_start, '\"');
531 if ((rel_end == NULL) ||
532 (rel_end == rel_start) ||
533 (rel_end >= link_tag_end) )
535 if (strncasecmp(rel, rel_start, repllen)!= 0)
536 continue; /* didn't match? never mind... */
538 href_start = cbmstrcasestr(link_tag_start, "href=");
539 if ((href_start == NULL) ||
540 (href_start >= link_tag_end))
542 href_start = strchr(href_start, '\"');
543 if ((href_start == NULL) |
544 (href_start >= link_tag_end))
547 href_end = strchr(href_start, '\"');
548 if ((href_end == NULL) ||
549 (href_end == href_start) ||
550 (href_start >= link_tag_end))
552 StrBufPlain(target_buf, href_start, href_end - href_start);
560 * Wrapper for curl_easy_init() that includes the options common to all calls
561 * used in this module.
563 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
566 curl = curl_easy_init();
571 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
572 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
575 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
577 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
578 #ifdef CURLOPT_HTTP_CONTENT_DECODING
579 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
580 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
582 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
583 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
586 (!IsEmptyStr(config.c_ip_addr))
587 && (strcmp(config.c_ip_addr, "*"))
588 && (strcmp(config.c_ip_addr, "::"))
589 && (strcmp(config.c_ip_addr, "0.0.0.0"))
591 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
602 int current_service_priority;
603 int selected_service_priority;
604 StrBuf *current_service_uri;
605 StrBuf *selected_service_uri;
606 int current_service_is_oid2auth;
610 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
611 struct xrds *xrds = (struct xrds *) data;
614 ++xrds->nesting_level;
616 if (!strcasecmp(supplied_el, "XRD")) {
620 else if (!strcasecmp(supplied_el, "service")) {
621 xrds->current_service_priority = 0;
622 xrds->current_service_is_oid2auth = 0;
623 for (i=0; attr[i] != NULL; i+=2) {
624 if (!strcasecmp(attr[i], "priority")) {
625 xrds->current_service_priority = atoi(attr[i+1]);
630 FlushStrBuf(xrds->CharData);
634 void xrds_xml_end(void *data, const char *supplied_el) {
635 struct xrds *xrds = (struct xrds *) data;
637 --xrds->nesting_level;
639 if (!strcasecmp(supplied_el, "XRD")) {
643 else if (!strcasecmp(supplied_el, "type")) {
645 && (!strcasecmp(ChrPtr(xrds->CharData), "http://specs.openid.net/auth/2.0/server"))
647 xrds->current_service_is_oid2auth = 1;
651 else if (!strcasecmp(supplied_el, "uri")) {
653 FlushStrBuf(xrds->current_service_uri);
654 StrBufAppendBuf(xrds->current_service_uri, xrds->CharData, 0);
658 else if (!strcasecmp(supplied_el, "service")) {
660 && (xrds->current_service_priority < xrds->selected_service_priority)
661 && (xrds->current_service_is_oid2auth)
663 xrds->selected_service_priority = xrds->current_service_priority;
664 FlushStrBuf(xrds->selected_service_uri);
665 StrBufAppendBuf(xrds->selected_service_uri, xrds->current_service_uri, 0);
670 FlushStrBuf(xrds->CharData);
674 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
675 struct xrds *xrds = (struct xrds *) data;
677 StrBufAppendBufPlain (xrds->CharData, s, len, 0);
682 * Parse an XRDS document.
683 * If an OpenID Provider URL is discovered, op_url to that value and return nonzero.
684 * If nothing useful happened, return 0.
686 int parse_xrds_document(StrBuf *ReplyBuf) {
687 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
689 int return_value = 0;
691 // syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf));
693 memset(&xrds, 0, sizeof (struct xrds));
694 xrds.selected_service_priority = INT_MAX;
695 xrds.CharData = NewStrBuf();
696 xrds.current_service_uri = NewStrBuf();
697 xrds.selected_service_uri = NewStrBuf();
698 XML_Parser xp = XML_ParserCreate(NULL);
700 XML_SetUserData(xp, &xrds);
701 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
702 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
703 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
704 XML_Parse(xp, "", 0, 1);
708 syslog(LOG_ALERT, "Cannot create XML parser");
711 if (xrds.selected_service_priority < INT_MAX) {
712 if (oiddata->op_url == NULL) {
713 oiddata->op_url = NewStrBuf();
715 FlushStrBuf(oiddata->op_url);
716 StrBufAppendBuf(oiddata->op_url, xrds.selected_service_uri, 0);
717 return_value = openid_disco_xrds;
720 FreeStrBuf(&xrds.CharData);
721 FreeStrBuf(&xrds.current_service_uri);
722 FreeStrBuf(&xrds.selected_service_uri);
724 return(return_value);
730 * Callback function for perform_openid2_discovery()
731 * We're interested in the X-XRDS-Location: header.
733 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
735 StrBuf **x_xrds_location = (StrBuf **) userdata;
737 memcpy(hdr, ptr, (size*nmemb));
740 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
741 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
742 StrBufTrim(*x_xrds_location);
745 return(size * nmemb);
749 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
751 * If Yadis fails, we then attempt HTML discovery using the same document.
753 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
754 * If fails, returns 0 and does nothing else.
756 int perform_openid2_discovery(StrBuf *YadisURL) {
757 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
759 StrBuf *ReplyBuf = NULL;
760 int return_value = 0;
763 char errmsg[1024] = "";
764 struct curl_slist *my_headers = NULL;
765 StrBuf *x_xrds_location = NULL;
767 if (!YadisURL) return(0);
768 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL));
769 if (StrLength(YadisURL) == 0) return(0);
771 ReplyBuf = NewStrBuf();
772 if (!ReplyBuf) return(0);
774 curl = ctdl_openid_curl_easy_init(errmsg);
775 if (!curl) return(0);
777 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
778 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
779 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
781 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
782 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
783 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
785 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
786 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
788 result = curl_easy_perform(curl);
790 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
792 curl_slist_free_all(my_headers);
793 curl_easy_cleanup(curl);
794 docbytes = StrLength(ReplyBuf);
797 * The response from the server will be one of:
799 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
800 * attribute, X-XRDS-Location,
802 /* FIXME handle this somehow */
805 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
806 * together with a document.
807 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
808 * a contenttype response-header specifying MIME media type,
809 * application/xrds+xml, or both.
811 * If the X-XRDS-Location header was delivered, we know about it at this point...
813 if ( (x_xrds_location)
814 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
816 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
817 return_value = perform_openid2_discovery(x_xrds_location);
818 FreeStrBuf(&x_xrds_location);
822 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
824 else if (docbytes >= 0) {
825 return_value = parse_xrds_document(ReplyBuf);
829 * Option 5: if all else fails, attempt HTML based discovery.
831 if (return_value == 0) {
832 syslog(LOG_DEBUG, "Attempting HTML discovery");
833 if (oiddata->op_url == NULL) {
834 oiddata->op_url = NewStrBuf();
836 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
837 if (StrLength(oiddata->op_url) > 0) {
838 return_value = openid_disco_html;
842 if (ReplyBuf != NULL) {
843 FreeStrBuf(&ReplyBuf);
845 return(return_value);
850 * Setup an OpenID authentication
852 void cmd_oids(char *argbuf) {
853 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
854 const char *Pos = NULL;
855 StrBuf *ArgBuf = NULL;
856 StrBuf *ReplyBuf = NULL;
857 StrBuf *return_to = NULL;
858 StrBuf *trust_root = NULL;
859 StrBuf *openid_delegate = NULL;
860 StrBuf *RedirectUrl = NULL;
861 ctdl_openid *oiddata;
862 int discovery_succeeded = 0;
864 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
866 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
867 if (oiddata == NULL) {
868 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
869 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
872 memset(oiddata, 0, sizeof(ctdl_openid));
873 CCC->openid_data = (void *) oiddata;
875 ArgBuf = NewStrBufPlain(argbuf, -1);
877 oiddata->verified = 0;
878 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
879 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
880 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
882 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
883 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
884 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
886 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
889 /********** OpenID 2.0 section 7.3 - Discovery **********/
891 /* Section 7.3.1 says we have to attempt XRI based discovery.
892 * No one is using this, no one is asking for it, no one wants it.
893 * So we're not even going to bother attempting this mode.
896 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
898 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
900 if (discovery_succeeded == 0) {
901 cprintf("%d There is no OpenID identity provider at this location.\n", ERROR);
906 * If we get to this point we are in possession of a valid OpenID Provider URL.
908 syslog(LOG_DEBUG, "OP URI '%s' discovered using method %d",
909 ChrPtr(oiddata->claimed_id),
913 /* Empty delegate is legal; we just use the openid_url instead */
914 if (StrLength(openid_delegate) == 0) {
915 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
918 /* Assemble a URL to which the user-agent will be redirected. */
920 RedirectUrl = NewStrBufDup(oiddata->op_url);
922 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup&openid.identity="), 0);
923 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
925 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
926 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
928 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
929 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
931 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
932 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
934 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
938 FreeStrBuf(&ReplyBuf);
939 FreeStrBuf(&return_to);
940 FreeStrBuf(&trust_root);
941 FreeStrBuf(&openid_delegate);
942 FreeStrBuf(&RedirectUrl);
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->op_url) == 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->op_url));
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 */