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 */
62 void Free_ctdl_openid(ctdl_openid **FreeMe)
64 if (*FreeMe == NULL) {
67 FreeStrBuf(&(*FreeMe)->op_url);
68 FreeStrBuf(&(*FreeMe)->claimed_id);
69 DeleteHash(&(*FreeMe)->sreg_keys);
76 * This cleanup function blows away the temporary memory used by this module.
78 void openid_cleanup_function(void) {
79 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
81 if (CCC->openid_data != NULL) {
82 syslog(LOG_DEBUG, "Clearing OpenID session state");
83 Free_ctdl_openid((ctdl_openid **) &CCC->openid_data);
88 /**************************************************************************/
90 /* Functions in this section handle Citadel internal OpenID mapping stuff */
92 /**************************************************************************/
96 * The structure of an openid record *key* is:
98 * |--------------claimed_id-------------|
99 * (actual length of claimed id)
102 * The structure of an openid record *value* is:
104 * |-----user_number----|------------claimed_id---------------|
105 * (sizeof long) (actual length of claimed id)
112 * Attach an OpenID to a Citadel account
114 int attach_openid(struct ctdluser *who, StrBuf *claimed_id)
116 struct cdbdata *cdboi;
117 long fetched_usernum;
123 if (StrLength(claimed_id)==0) return(1);
125 /* Check to see if this OpenID is already in the database */
127 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
129 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
132 if (fetched_usernum == who->usernum) {
133 syslog(LOG_INFO, "%s already associated; no action is taken", ChrPtr(claimed_id));
137 syslog(LOG_INFO, "%s already belongs to another user", ChrPtr(claimed_id));
142 /* Not already in the database, so attach it now */
144 data_len = sizeof(long) + StrLength(claimed_id) + 1;
145 data = malloc(data_len);
147 memcpy(data, &who->usernum, sizeof(long));
148 memcpy(&data[sizeof(long)], ChrPtr(claimed_id), StrLength(claimed_id) + 1);
150 cdb_store(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id), data, data_len);
153 snprintf(buf, sizeof buf, "User <%s> (#%ld) has claimed the OpenID URL %s\n",
154 who->fullname, who->usernum, ChrPtr(claimed_id));
155 CtdlAideMessage(buf, "OpenID claim");
156 syslog(LOG_INFO, "%s", buf);
163 * When a user is being deleted, we have to delete any OpenID associations
165 void openid_purge(struct ctdluser *usbuf) {
166 struct cdbdata *cdboi;
167 HashList *keys = NULL;
169 char *deleteme = NULL;
175 keys = NewHash(1, NULL);
178 cdb_rewind(CDB_OPENID);
179 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
180 if (cdboi->len > sizeof(long)) {
181 memcpy(&usernum, cdboi->ptr, sizeof(long));
182 if (usernum == usbuf->usernum) {
183 deleteme = strdup(cdboi->ptr + sizeof(long)),
184 Put(keys, deleteme, strlen(deleteme), deleteme, NULL);
190 /* Go through the hash list, deleting keys we stored in it */
192 HashPos = GetNewHashPos(keys, 0);
193 while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
195 syslog(LOG_DEBUG, "Deleting associated OpenID <%s>", (char*)Value);
196 cdb_delete(CDB_OPENID, Value, strlen(Value));
197 /* note: don't free(Value) -- deleting the hash list will handle this for us */
199 DeleteHashPos(&HashPos);
205 * List the OpenIDs associated with the currently logged in account
207 void cmd_oidl(char *argbuf) {
208 struct cdbdata *cdboi;
211 if (CtdlAccessCheck(ac_logged_in)) return;
212 cdb_rewind(CDB_OPENID);
213 cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
215 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
216 if (cdboi->len > sizeof(long)) {
217 memcpy(&usernum, cdboi->ptr, sizeof(long));
218 if (usernum == CC->user.usernum) {
219 cprintf("%s\n", cdboi->ptr + sizeof(long));
229 * List ALL OpenIDs in the database
231 void cmd_oida(char *argbuf) {
232 struct cdbdata *cdboi;
234 struct ctdluser usbuf;
236 if (CtdlAccessCheck(ac_aide)) return;
237 cdb_rewind(CDB_OPENID);
238 cprintf("%d List of all OpenIDs in the database:\n", LISTING_FOLLOWS);
240 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
241 if (cdboi->len > sizeof(long)) {
242 memcpy(&usernum, cdboi->ptr, sizeof(long));
243 if (CtdlGetUserByNumber(&usbuf, usernum) != 0) {
244 usbuf.fullname[0] = 0;
246 cprintf("%s|%ld|%s\n",
247 cdboi->ptr + sizeof(long),
259 * Attempt to register (populate the vCard) the currently-logged-in user
260 * using the data from Simple Registration Extension, if present.
262 void populate_vcard_from_sreg(HashList *sreg_keys) {
265 int pop = 0; /* number of fields populated */
267 char *postcode = NULL;
268 char *country = NULL;
270 if (!sreg_keys) return;
274 if (GetHash(sreg_keys, "identity", 8, (void *) &data)) {
275 vcard_add_prop(v, "url;type=openid", data);
279 if (GetHash(sreg_keys, "sreg.email", 10, (void *) &data)) {
280 vcard_add_prop(v, "email;internet", data);
284 if (GetHash(sreg_keys, "sreg.nickname", 13, (void *) &data)) {
285 vcard_add_prop(v, "nickname", data);
289 if (GetHash(sreg_keys, "sreg.fullname", 13, (void *) &data)) {
291 vcard_add_prop(v, "fn", data);
292 vcard_fn_to_n(n, data, sizeof n);
293 vcard_add_prop(v, "n", n);
297 if (!GetHash(sreg_keys, "sreg.postcode", 13, (void *) &postcode)) {
301 if (!GetHash(sreg_keys, "sreg.country", 12, (void *) &country)) {
305 if (postcode || country) {
307 snprintf(adr, sizeof adr, ";;;;;%s;%s",
308 (postcode ? postcode : ""),
309 (country ? country : "")
311 vcard_add_prop(v, "adr", adr);
315 if (GetHash(sreg_keys, "sreg.dob", 8, (void *) &data)) {
316 vcard_add_prop(v, "bday", data);
320 if (GetHash(sreg_keys, "sreg.gender", 11, (void *) &data)) {
321 vcard_add_prop(v, "x-funambol-gender", data);
325 /* Only save the vCard if there is some useful data in it */
328 ser = vcard_serialize(v);
330 CtdlWriteObject(USERCONFIGROOM, "text/x-vcard",
331 ser, strlen(ser)+1, &CC->user, 0, 0, 0
341 * Create a new user account, manually specifying the name, after successfully
342 * verifying an OpenID (which will of course be attached to the account)
344 void cmd_oidc(char *argbuf) {
345 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
348 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
352 if (!oiddata->verified) {
353 cprintf("%d You have not verified an OpenID yet.\n", ERROR);
357 /* We can make the semantics of OIDC exactly the same as NEWU, simply
358 * by _calling_ cmd_newu() and letting it run. Very clever!
362 /* Now, if this logged us in, we have to attach the OpenID */
364 attach_openid(&CC->user, oiddata->claimed_id);
365 if (oiddata->sreg_keys != NULL) {
366 populate_vcard_from_sreg(oiddata->sreg_keys);
374 * Detach an OpenID from the currently logged in account
376 void cmd_oidd(char *argbuf) {
377 struct cdbdata *cdboi;
378 char id_to_detach[1024];
379 int this_is_mine = 0;
382 if (CtdlAccessCheck(ac_logged_in)) return;
383 extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
384 if (IsEmptyStr(id_to_detach)) {
385 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
388 cdb_rewind(CDB_OPENID);
389 while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
390 if (cdboi->len > sizeof(long)) {
391 memcpy(&usernum, cdboi->ptr, sizeof(long));
392 if (usernum == CC->user.usernum) {
400 cprintf("%d That OpenID was not found or not associated with your account.\n",
401 ERROR + ILLEGAL_VALUE);
405 cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
406 cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
412 * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
414 int openid_create_user_via_sreg(StrBuf *claimed_id, HashList *sreg_keys)
416 char *desired_name = NULL;
417 char new_password[32];
420 if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
421 if (config.c_disable_newu) return(2);
422 if (CC->logged_in) return(3);
423 if (!GetHash(sreg_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
425 syslog(LOG_DEBUG, "The desired account name is <%s>", desired_name);
427 len = cutuserkey(desired_name);
428 if (!CtdlGetUser(&CC->user, desired_name)) {
429 syslog(LOG_DEBUG, "<%s> is already taken by another user.", desired_name);
430 memset(&CC->user, 0, sizeof(struct ctdluser));
434 /* The desired account name is available. Create the account and log it in! */
435 if (create_user(desired_name, len, 1)) return(6);
437 snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
438 CtdlSetPassword(new_password);
439 attach_openid(&CC->user, claimed_id);
440 populate_vcard_from_sreg(sreg_keys);
446 * If a user account exists which is associated with the Claimed ID, log it in and return zero.
447 * Otherwise it returns nonzero.
449 int login_via_openid(StrBuf *claimed_id)
451 struct cdbdata *cdboi;
454 cdboi = cdb_fetch(CDB_OPENID, ChrPtr(claimed_id), StrLength(claimed_id));
459 memcpy(&usernum, cdboi->ptr, sizeof(long));
462 if (!CtdlGetUserByNumber(&CC->user, usernum)) {
463 /* Now become the user we just created */
464 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
469 memset(&CC->user, 0, sizeof(struct ctdluser));
477 /**************************************************************************/
479 /* Functions in this section handle OpenID protocol */
481 /**************************************************************************/
485 * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
487 void extract_link(StrBuf *target_buf, const char *rel, long repllen, StrBuf *source_buf)
491 const char *href_start = NULL;
492 const char *href_end = NULL;
493 const char *link_tag_start = NULL;
494 const char *link_tag_end = NULL;
495 const char *rel_start = NULL;
496 const char *rel_end = NULL;
498 if (!target_buf) return;
500 if (!source_buf) return;
502 ptr = ChrPtr(source_buf);
504 FlushStrBuf(target_buf);
505 while (ptr = cbmstrcasestr(ptr, "<link"), ptr != NULL) {
507 link_tag_start = ptr;
508 link_tag_end = strchr(ptr, '>');
509 if (link_tag_end == NULL)
511 for (i=0; i < 1; i++ ){
512 rel_start = cbmstrcasestr(link_tag_start, "rel=");
513 if ((rel_start == NULL) ||
514 (rel_start > link_tag_end))
517 rel_start = strchr(rel_start, '\"');
518 if ((rel_start == NULL) ||
519 (rel_start > link_tag_end))
522 rel_end = strchr(rel_start, '\"');
523 if ((rel_end == NULL) ||
524 (rel_end == rel_start) ||
525 (rel_end >= link_tag_end) )
527 if (strncasecmp(rel, rel_start, repllen)!= 0)
528 continue; /* didn't match? never mind... */
530 href_start = cbmstrcasestr(link_tag_start, "href=");
531 if ((href_start == NULL) ||
532 (href_start >= link_tag_end))
534 href_start = strchr(href_start, '\"');
535 if ((href_start == NULL) |
536 (href_start >= link_tag_end))
539 href_end = strchr(href_start, '\"');
540 if ((href_end == NULL) ||
541 (href_end == href_start) ||
542 (href_start >= link_tag_end))
544 StrBufPlain(target_buf, href_start, href_end - href_start);
552 * Wrapper for curl_easy_init() that includes the options common to all calls
553 * used in this module.
555 CURL *ctdl_openid_curl_easy_init(char *errmsg) {
558 curl = curl_easy_init();
563 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
564 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
567 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
569 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
570 #ifdef CURLOPT_HTTP_CONTENT_DECODING
571 curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1);
572 curl_easy_setopt(curl, CURLOPT_ENCODING, "");
574 curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
575 curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30); /* die after 30 seconds */
578 (!IsEmptyStr(config.c_ip_addr))
579 && (strcmp(config.c_ip_addr, "*"))
580 && (strcmp(config.c_ip_addr, "::"))
581 && (strcmp(config.c_ip_addr, "0.0.0.0"))
583 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
593 int current_service_priority;
594 int selected_service_priority; /* more here later */
598 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
599 struct xrds *xrds = (struct xrds *) data;
602 ++xrds->nesting_level;
604 if (!strcasecmp(supplied_el, "XRD")) {
606 syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***");
609 else if (!strcasecmp(supplied_el, "service")) {
610 xrds->current_service_priority = 0;
611 for (i=0; attr[i] != NULL; i+=2) {
612 if (!strcasecmp(attr[i], "priority")) {
613 xrds->current_service_priority = atoi(attr[i+1]);
620 void xrds_xml_end(void *data, const char *supplied_el) {
621 struct xrds *xrds = (struct xrds *) data;
623 --xrds->nesting_level;
625 if (!strcasecmp(supplied_el, "XRD")) {
627 syslog(LOG_DEBUG, "*** XRD CONTAINER END ***");
630 else if (!strcasecmp(supplied_el, "service")) {
631 /* this is where we should evaluate the service and do stuff */
632 xrds->current_service_priority = 0;
637 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
638 struct xrds *xrds = (struct xrds *) data;
640 if (xrds) ; /* this is only here to silence the warning for now */
642 /* StrBufAppendBufPlain (xrds->CData, s, len, 0); */
647 * Parse an XRDS document.
648 * If OpenID stuff is discovered, populate FIXME something and return nonzero
649 * If nothing useful happened, return 0.
651 int parse_xrds_document(StrBuf *ReplyBuf) {
654 syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf));
656 memset(&xrds, 0, sizeof (struct xrds));
657 XML_Parser xp = XML_ParserCreate(NULL);
659 XML_SetUserData(xp, &xrds);
660 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
661 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
662 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
663 XML_Parse(xp, "", 0, 1);
667 syslog(LOG_ALERT, "Cannot create XML parser");
670 return(0); /* FIXME return nonzero if something wonderful happened */
676 * Callback function for perform_openid2_discovery()
677 * We're interested in the X-XRDS-Location: header.
679 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
681 StrBuf **x_xrds_location = (StrBuf **) userdata;
683 memcpy(hdr, ptr, (size*nmemb));
686 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
687 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
688 StrBufTrim(*x_xrds_location);
691 return(size * nmemb);
696 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
698 * If Yadis fails, we then attempt HTML discovery using the same document.
700 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
701 * If fails, returns 0 and does nothing else.
703 int perform_openid2_discovery(StrBuf *YadisURL) {
704 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
706 StrBuf *ReplyBuf = NULL;
707 int return_value = 0;
710 char errmsg[1024] = "";
711 struct curl_slist *my_headers = NULL;
712 StrBuf *x_xrds_location = NULL;
714 if (YadisURL == NULL) return(0);
715 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL));
716 if (StrLength(YadisURL) == 0) return(0);
718 ReplyBuf = NewStrBuf ();
719 if (ReplyBuf == 0) return(0);
721 curl = ctdl_openid_curl_easy_init(errmsg);
722 if (!curl) return(0);
724 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
725 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
726 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
728 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
729 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
730 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
732 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
733 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
735 result = curl_easy_perform(curl);
737 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
739 curl_slist_free_all(my_headers);
740 curl_easy_cleanup(curl);
741 docbytes = StrLength(ReplyBuf);
744 * The response from the server will be one of:
746 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
747 * attribute, X-XRDS-Location,
749 /* FIXME handle this somehow */
752 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
753 * together with a document.
754 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
755 * a contenttype response-header specifying MIME media type,
756 * application/xrds+xml, or both.
758 * If the X-XRDS-Location header was delivered, we know about it at this point...
760 if ( (x_xrds_location)
761 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
763 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
764 return_value = perform_openid2_discovery(x_xrds_location);
765 FreeStrBuf(&x_xrds_location);
769 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
771 else if (docbytes >= 0) {
772 return_value = parse_xrds_document(ReplyBuf);
776 * Option 5: if all else fails, attempt HTML based discovery.
778 if (return_value == 0) {
779 syslog(LOG_DEBUG, "Attempting HTML discovery");
780 if (oiddata->op_url == NULL) {
781 oiddata->op_url = NewStrBuf();
783 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
784 if (StrLength(oiddata->op_url) > 0) {
785 syslog(LOG_DEBUG, "\033[31mHTML DISCO PROVIDER: %s\033[0m", ChrPtr(oiddata->op_url));
790 if (ReplyBuf != NULL) {
791 FreeStrBuf(&ReplyBuf);
793 return(return_value);
798 * Setup an OpenID authentication
800 void cmd_oids(char *argbuf) {
801 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
802 const char *Pos = NULL;
803 StrBuf *ArgBuf = NULL;
804 StrBuf *ReplyBuf = NULL;
805 StrBuf *return_to = NULL;
806 StrBuf *trust_root = NULL;
807 StrBuf *openid_delegate = NULL;
808 StrBuf *RedirectUrl = NULL;
809 ctdl_openid *oiddata;
810 int discovery_succeeded = 0;
812 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
814 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
815 if (oiddata == NULL) {
816 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
817 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
820 memset(oiddata, 0, sizeof(ctdl_openid));
821 CCC->openid_data = (void *) oiddata;
823 ArgBuf = NewStrBufPlain(argbuf, -1);
825 oiddata->verified = 0;
826 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
827 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
828 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
830 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
831 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
832 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
834 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
837 /********** OpenID 2.0 section 7.3 - Discovery **********/
839 /* Section 7.3.1 says we have to attempt XRI based discovery.
840 * No one is using this, no one is asking for it, no one wants it.
841 * So we're not even going to bother attempting this mode.
844 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
846 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
848 /* Empty delegate is legal; we just use the openid_url instead */
849 if (StrLength(openid_delegate) == 0) {
850 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
853 if (StrLength(oiddata->op_url) == 0) {
854 cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
859 /* Assemble a URL to which the user-agent will be redirected. */
861 RedirectUrl = NewStrBufDup(oiddata->op_url);
863 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup"
864 "&openid.identity="), 0);
865 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
867 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
868 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
870 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
871 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
873 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
874 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
876 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
880 FreeStrBuf(&ReplyBuf);
881 FreeStrBuf(&return_to);
882 FreeStrBuf(&trust_root);
883 FreeStrBuf(&openid_delegate);
884 FreeStrBuf(&RedirectUrl);
892 * Finalize an OpenID authentication
894 void cmd_oidf(char *argbuf) {
899 HashList *keys = NULL;
900 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
902 if (oiddata == NULL) {
903 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
906 if (StrLength(oiddata->op_url) == 0){
907 cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE);
910 keys = NewHash(1, NULL);
912 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
915 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
917 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
918 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
920 len = sizeof(thiskey) - 1;
921 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
922 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
923 Put(keys, thiskey, len, strdup(thisdata), NULL);
927 /* Now that we have all of the parameters, we have to validate the signature against the server */
928 syslog(LOG_DEBUG, "About to validate the signature...");
932 struct curl_httppost *formpost = NULL;
933 struct curl_httppost *lastptr = NULL;
934 char errmsg[1024] = "";
935 char *o_assoc_handle = NULL;
937 char *o_signed = NULL;
938 int num_signed_values;
941 char k_o_keyname[128];
942 char *k_value = NULL;
945 curl_formadd(&formpost, &lastptr,
946 CURLFORM_COPYNAME, "openid.mode",
947 CURLFORM_COPYCONTENTS, "check_authentication",
949 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
951 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
952 curl_formadd(&formpost, &lastptr,
953 CURLFORM_COPYNAME, "openid.assoc_handle",
954 CURLFORM_COPYCONTENTS, o_assoc_handle,
956 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
959 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
960 curl_formadd(&formpost, &lastptr,
961 CURLFORM_COPYNAME, "openid.sig",
962 CURLFORM_COPYCONTENTS, o_sig,
964 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
967 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
968 curl_formadd(&formpost, &lastptr,
969 CURLFORM_COPYNAME, "openid.signed",
970 CURLFORM_COPYCONTENTS, o_signed,
972 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
974 num_signed_values = num_tokens(o_signed, ',');
975 for (i=0; i<num_signed_values; ++i) {
976 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
977 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
978 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
979 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
980 curl_formadd(&formpost, &lastptr,
981 CURLFORM_COPYNAME, k_o_keyname,
982 CURLFORM_COPYCONTENTS, k_value,
984 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
987 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
994 ReplyBuf = NewStrBuf();
996 curl = ctdl_openid_curl_easy_init(errmsg);
997 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->op_url));
998 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
999 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1000 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1002 res = curl_easy_perform(curl);
1004 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1006 curl_easy_cleanup(curl);
1007 curl_formfree(formpost);
1009 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
1010 oiddata->verified = 1;
1012 FreeStrBuf(&ReplyBuf);
1014 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1016 /* Respond to the client */
1018 if (oiddata->verified) {
1020 /* If we were already logged in, attach the OpenID to the user's account */
1021 if (CC->logged_in) {
1022 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1023 cprintf("attach\n");
1024 syslog(LOG_DEBUG, "OpenID attach succeeded");
1028 syslog(LOG_DEBUG, "OpenID attach failed");
1032 /* Otherwise, a user is attempting to log in using the verified OpenID */
1035 * Existing user who has claimed this OpenID?
1037 * Note: if you think that sending the password back over the wire is insecure,
1038 * check your assumptions. If someone has successfully asserted an OpenID that
1039 * is associated with the account, they already have password equivalency and can
1040 * login, so they could just as easily change the password, etc.
1042 if (login_via_openid(oiddata->claimed_id) == 0) {
1043 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1044 logged_in_response();
1045 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1049 * If this system does not allow self-service new user registration, the
1050 * remaining modes do not apply, so fail here and now.
1052 else if (config.c_disable_newu) {
1054 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1058 * New user whose OpenID is verified and Simple Registration Extension is in use?
1060 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1061 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1062 logged_in_response();
1063 syslog(LOG_DEBUG, "Successfully auto-created new user");
1067 * OpenID is verified, but the desired username either was not specified or
1068 * conflicts with an existing user. Manual account creation is required.
1071 char *desired_name = NULL;
1072 cprintf("verify_only\n");
1073 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1074 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1075 cprintf("%s\n", desired_name);
1080 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1089 if (oiddata->sreg_keys != NULL) {
1090 DeleteHash(&oiddata->sreg_keys);
1091 oiddata->sreg_keys = NULL;
1093 oiddata->sreg_keys = keys;
1098 /**************************************************************************/
1100 /* Functions in this section handle module initialization and shutdown */
1102 /**************************************************************************/
1107 CTDL_MODULE_INIT(openid_rp)
1110 curl_global_init(CURL_GLOBAL_ALL);
1112 /* Only enable the OpenID command set when native mode authentication is in use. */
1113 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1114 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1115 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1116 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1117 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1118 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1119 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1121 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1122 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1123 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1126 /* return our module name for the log */