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);
594 int current_service_priority;
595 int selected_service_priority; /* FIXME more here later */
599 void xrds_xml_start(void *data, const char *supplied_el, const char **attr) {
600 struct xrds *xrds = (struct xrds *) data;
603 ++xrds->nesting_level;
605 if (!strcasecmp(supplied_el, "XRD")) {
607 syslog(LOG_DEBUG, "*** XRD CONTAINER BEGIN ***");
610 else if (!strcasecmp(supplied_el, "service")) {
611 xrds->current_service_priority = 0;
612 for (i=0; attr[i] != NULL; i+=2) {
613 if (!strcasecmp(attr[i], "priority")) {
614 xrds->current_service_priority = atoi(attr[i+1]);
619 FlushStrBuf(xrds->CharData);
623 void xrds_xml_end(void *data, const char *supplied_el) {
624 struct xrds *xrds = (struct xrds *) data;
626 --xrds->nesting_level;
628 if (!strcasecmp(supplied_el, "XRD")) {
630 syslog(LOG_DEBUG, "*** XRD CONTAINER END ***");
633 else if (!strcasecmp(supplied_el, "service")) {
634 /* this is where we should evaluate the service and do stuff */
635 xrds->current_service_priority = 0;
638 FlushStrBuf(xrds->CharData);
642 void xrds_xml_chardata(void *data, const XML_Char *s, int len) {
643 struct xrds *xrds = (struct xrds *) data;
645 StrBufAppendBufPlain (xrds->CharData, s, len, 0);
650 * Parse an XRDS document.
651 * If an OpenID Provider URL is discovered, op_url to that value and return nonzero.
652 * If nothing useful happened, return 0.
654 int parse_xrds_document(StrBuf *ReplyBuf) {
655 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
657 int return_value = 0;
659 syslog(LOG_DEBUG, "\033[32m --- XRDS DOCUMENT --- \n%s\033[0m", ChrPtr(ReplyBuf));
661 memset(&xrds, 0, sizeof (struct xrds));
662 xrds.CharData = NewStrBuf();
663 XML_Parser xp = XML_ParserCreate(NULL);
665 XML_SetUserData(xp, &xrds);
666 XML_SetElementHandler(xp, xrds_xml_start, xrds_xml_end);
667 XML_SetCharacterDataHandler(xp, xrds_xml_chardata);
668 XML_Parse(xp, ChrPtr(ReplyBuf), StrLength(ReplyBuf), 0);
669 XML_Parse(xp, "", 0, 1);
673 syslog(LOG_ALERT, "Cannot create XML parser");
675 FreeStrBuf(&xrds.CharData);
677 if (StrLength(oiddata->op_url) > 0) {
678 syslog(LOG_DEBUG, "\033[31mOP VIA XRDS DISCO: %s\033[0m", ChrPtr(oiddata->op_url));
681 return(return_value);
687 * Callback function for perform_openid2_discovery()
688 * We're interested in the X-XRDS-Location: header.
690 size_t yadis_headerfunction(void *ptr, size_t size, size_t nmemb, void *userdata) {
692 StrBuf **x_xrds_location = (StrBuf **) userdata;
694 memcpy(hdr, ptr, (size*nmemb));
697 if (!strncasecmp(hdr, "X-XRDS-Location:", 16)) {
698 *x_xrds_location = NewStrBufPlain(&hdr[16], ((size*nmemb)-16));
699 StrBufTrim(*x_xrds_location);
702 return(size * nmemb);
707 /* Attempt to perform Yadis discovery as specified in Yadis 1.0 section 6.2.5.
709 * If Yadis fails, we then attempt HTML discovery using the same document.
711 * If successful, returns nonzero and calls parse_xrds_document() to act upon the received data.
712 * If fails, returns 0 and does nothing else.
714 int perform_openid2_discovery(StrBuf *YadisURL) {
715 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
717 StrBuf *ReplyBuf = NULL;
718 int return_value = 0;
721 char errmsg[1024] = "";
722 struct curl_slist *my_headers = NULL;
723 StrBuf *x_xrds_location = NULL;
725 if (!YadisURL) return(0);
726 syslog(LOG_DEBUG, "perform_openid2_discovery(%s)", ChrPtr(YadisURL));
727 if (StrLength(YadisURL) == 0) return(0);
729 ReplyBuf = NewStrBuf();
730 if (!ReplyBuf) return(0);
732 curl = ctdl_openid_curl_easy_init(errmsg);
733 if (!curl) return(0);
735 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(YadisURL));
736 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
737 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
739 my_headers = curl_slist_append(my_headers, "Accept:"); /* disable the default Accept: header */
740 my_headers = curl_slist_append(my_headers, "Accept: application/xrds+xml");
741 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, my_headers);
743 curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &x_xrds_location);
744 curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, yadis_headerfunction);
746 result = curl_easy_perform(curl);
748 syslog(LOG_DEBUG, "libcurl error %d: %s", result, errmsg);
750 curl_slist_free_all(my_headers);
751 curl_easy_cleanup(curl);
752 docbytes = StrLength(ReplyBuf);
755 * The response from the server will be one of:
757 * Option 1: An HTML document with a <head> element that includes a <meta> element with http-equiv
758 * attribute, X-XRDS-Location,
760 /* FIXME handle this somehow */
763 * Option 2: HTTP response-headers that include an X-XRDS-Location response-header,
764 * together with a document.
765 * Option 3: HTTP response-headers only, which MAY include an X-XRDS-Location response-header,
766 * a contenttype response-header specifying MIME media type,
767 * application/xrds+xml, or both.
769 * If the X-XRDS-Location header was delivered, we know about it at this point...
771 if ( (x_xrds_location)
772 && (strcmp(ChrPtr(x_xrds_location), ChrPtr(YadisURL)))
774 syslog(LOG_DEBUG, "X-XRDS-Location: %s ... recursing!", ChrPtr(x_xrds_location));
775 return_value = perform_openid2_discovery(x_xrds_location);
776 FreeStrBuf(&x_xrds_location);
780 * Option 4: the returned web page may *be* an XRDS document. Try to parse it.
782 else if (docbytes >= 0) {
783 return_value = parse_xrds_document(ReplyBuf);
787 * Option 5: if all else fails, attempt HTML based discovery.
789 if (return_value == 0) {
790 syslog(LOG_DEBUG, "Attempting HTML discovery");
791 if (oiddata->op_url == NULL) {
792 oiddata->op_url = NewStrBuf();
794 extract_link(oiddata->op_url, HKEY("openid2.provider"), ReplyBuf);
795 if (StrLength(oiddata->op_url) > 0) {
796 syslog(LOG_DEBUG, "\033[31mOP VIA HTML DISCO: %s\033[0m", ChrPtr(oiddata->op_url));
801 if (ReplyBuf != NULL) {
802 FreeStrBuf(&ReplyBuf);
804 return(return_value);
809 * Setup an OpenID authentication
811 void cmd_oids(char *argbuf) {
812 struct CitContext *CCC = CC; /* CachedCitContext - performance boost */
813 const char *Pos = NULL;
814 StrBuf *ArgBuf = NULL;
815 StrBuf *ReplyBuf = NULL;
816 StrBuf *return_to = NULL;
817 StrBuf *trust_root = NULL;
818 StrBuf *openid_delegate = NULL;
819 StrBuf *RedirectUrl = NULL;
820 ctdl_openid *oiddata;
821 int discovery_succeeded = 0;
823 Free_ctdl_openid ((ctdl_openid**)&CCC->openid_data);
825 CCC->openid_data = oiddata = malloc(sizeof(ctdl_openid));
826 if (oiddata == NULL) {
827 syslog(LOG_ALERT, "malloc() failed: %s", strerror(errno));
828 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
831 memset(oiddata, 0, sizeof(ctdl_openid));
832 CCC->openid_data = (void *) oiddata;
834 ArgBuf = NewStrBufPlain(argbuf, -1);
836 oiddata->verified = 0;
837 oiddata->claimed_id = NewStrBufPlain(NULL, StrLength(ArgBuf));
838 trust_root = NewStrBufPlain(NULL, StrLength(ArgBuf));
839 return_to = NewStrBufPlain(NULL, StrLength(ArgBuf));
841 StrBufExtract_NextToken(oiddata->claimed_id, ArgBuf, &Pos, '|');
842 StrBufExtract_NextToken(return_to, ArgBuf, &Pos, '|');
843 StrBufExtract_NextToken(trust_root, ArgBuf, &Pos, '|');
845 syslog(LOG_DEBUG, "User-Supplied Identifier is: %s", ChrPtr(oiddata->claimed_id));
848 /********** OpenID 2.0 section 7.3 - Discovery **********/
850 /* Section 7.3.1 says we have to attempt XRI based discovery.
851 * No one is using this, no one is asking for it, no one wants it.
852 * So we're not even going to bother attempting this mode.
855 /* Attempt section 7.3.2 (Yadis discovery) and section 7.3.3 (HTML discovery);
857 discovery_succeeded = perform_openid2_discovery(oiddata->claimed_id);
859 if (StrLength(oiddata->op_url) == 0) {
860 cprintf("%d There is no OpenID identity provider at this location.\n", ERROR);
865 * If we get to this point we are in possession of a valid OpenID Provider URL.
868 /* Empty delegate is legal; we just use the openid_url instead */
869 if (StrLength(openid_delegate) == 0) {
870 StrBufPlain(openid_delegate, SKEY(oiddata->claimed_id));
873 /* Assemble a URL to which the user-agent will be redirected. */
875 RedirectUrl = NewStrBufDup(oiddata->op_url);
877 StrBufAppendBufPlain(RedirectUrl, HKEY("?openid.mode=checkid_setup&openid.identity="), 0);
878 StrBufUrlescAppend(RedirectUrl, openid_delegate, NULL);
880 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.return_to="), 0);
881 StrBufUrlescAppend(RedirectUrl, return_to, NULL);
883 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.trust_root="), 0);
884 StrBufUrlescAppend(RedirectUrl, trust_root, NULL);
886 StrBufAppendBufPlain(RedirectUrl, HKEY("&openid.sreg.optional="), 0);
887 StrBufUrlescAppend(RedirectUrl, NULL, "nickname,email,fullname,postcode,country,dob,gender");
889 cprintf("%d %s\n", CIT_OK, ChrPtr(RedirectUrl));
893 FreeStrBuf(&ReplyBuf);
894 FreeStrBuf(&return_to);
895 FreeStrBuf(&trust_root);
896 FreeStrBuf(&openid_delegate);
897 FreeStrBuf(&RedirectUrl);
905 * Finalize an OpenID authentication
907 void cmd_oidf(char *argbuf) {
912 HashList *keys = NULL;
913 ctdl_openid *oiddata = (ctdl_openid *) CC->openid_data;
915 if (oiddata == NULL) {
916 cprintf("%d run OIDS first.\n", ERROR + INTERNAL_ERROR);
919 if (StrLength(oiddata->op_url) == 0){
920 cprintf("%d need a remote server to authenticate against\n", ERROR + ILLEGAL_VALUE);
923 keys = NewHash(1, NULL);
925 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
928 cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
930 while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
931 len = extract_token(thiskey, buf, 0, '|', sizeof thiskey);
933 len = sizeof(thiskey) - 1;
934 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
935 syslog(LOG_DEBUG, "%s: ["SIZE_T_FMT"] %s", thiskey, strlen(thisdata), thisdata);
936 Put(keys, thiskey, len, strdup(thisdata), NULL);
940 /* Now that we have all of the parameters, we have to validate the signature against the server */
941 syslog(LOG_DEBUG, "About to validate the signature...");
945 struct curl_httppost *formpost = NULL;
946 struct curl_httppost *lastptr = NULL;
947 char errmsg[1024] = "";
948 char *o_assoc_handle = NULL;
950 char *o_signed = NULL;
951 int num_signed_values;
954 char k_o_keyname[128];
955 char *k_value = NULL;
958 curl_formadd(&formpost, &lastptr,
959 CURLFORM_COPYNAME, "openid.mode",
960 CURLFORM_COPYCONTENTS, "check_authentication",
962 syslog(LOG_DEBUG, "%25s : %s", "openid.mode", "check_authentication");
964 if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
965 curl_formadd(&formpost, &lastptr,
966 CURLFORM_COPYNAME, "openid.assoc_handle",
967 CURLFORM_COPYCONTENTS, o_assoc_handle,
969 syslog(LOG_DEBUG, "%25s : %s", "openid.assoc_handle", o_assoc_handle);
972 if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
973 curl_formadd(&formpost, &lastptr,
974 CURLFORM_COPYNAME, "openid.sig",
975 CURLFORM_COPYCONTENTS, o_sig,
977 syslog(LOG_DEBUG, "%25s : %s", "openid.sig", o_sig);
980 if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
981 curl_formadd(&formpost, &lastptr,
982 CURLFORM_COPYNAME, "openid.signed",
983 CURLFORM_COPYCONTENTS, o_signed,
985 syslog(LOG_DEBUG, "%25s : %s", "openid.signed", o_signed);
987 num_signed_values = num_tokens(o_signed, ',');
988 for (i=0; i<num_signed_values; ++i) {
989 extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
990 if (strcasecmp(k_keyname, "mode")) { // work around phpMyID bug
991 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
992 snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
993 curl_formadd(&formpost, &lastptr,
994 CURLFORM_COPYNAME, k_o_keyname,
995 CURLFORM_COPYCONTENTS, k_value,
997 syslog(LOG_DEBUG, "%25s : %s", k_o_keyname, k_value);
1000 syslog(LOG_INFO, "OpenID: signed field '%s' is missing",
1007 ReplyBuf = NewStrBuf();
1009 curl = ctdl_openid_curl_easy_init(errmsg);
1010 curl_easy_setopt(curl, CURLOPT_URL, ChrPtr(oiddata->op_url));
1011 curl_easy_setopt(curl, CURLOPT_WRITEDATA, ReplyBuf);
1012 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, CurlFillStrBuf_callback);
1013 curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
1015 res = curl_easy_perform(curl);
1017 syslog(LOG_DEBUG, "cmd_oidf() libcurl error %d: %s", res, errmsg);
1019 curl_easy_cleanup(curl);
1020 curl_formfree(formpost);
1022 if (cbmstrcasestr(ChrPtr(ReplyBuf), "is_valid:true")) {
1023 oiddata->verified = 1;
1025 FreeStrBuf(&ReplyBuf);
1027 syslog(LOG_DEBUG, "Authentication %s.", (oiddata->verified ? "succeeded" : "failed") );
1029 /* Respond to the client */
1031 if (oiddata->verified) {
1033 /* If we were already logged in, attach the OpenID to the user's account */
1034 if (CC->logged_in) {
1035 if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
1036 cprintf("attach\n");
1037 syslog(LOG_DEBUG, "OpenID attach succeeded");
1041 syslog(LOG_DEBUG, "OpenID attach failed");
1045 /* Otherwise, a user is attempting to log in using the verified OpenID */
1048 * Existing user who has claimed this OpenID?
1050 * Note: if you think that sending the password back over the wire is insecure,
1051 * check your assumptions. If someone has successfully asserted an OpenID that
1052 * is associated with the account, they already have password equivalency and can
1053 * login, so they could just as easily change the password, etc.
1055 if (login_via_openid(oiddata->claimed_id) == 0) {
1056 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1057 logged_in_response();
1058 syslog(LOG_DEBUG, "Logged in using previously claimed OpenID");
1062 * If this system does not allow self-service new user registration, the
1063 * remaining modes do not apply, so fail here and now.
1065 else if (config.c_disable_newu) {
1067 syslog(LOG_DEBUG, "Creating user failed due to local policy");
1071 * New user whose OpenID is verified and Simple Registration Extension is in use?
1073 else if (openid_create_user_via_sreg(oiddata->claimed_id, keys) == 0) {
1074 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
1075 logged_in_response();
1076 syslog(LOG_DEBUG, "Successfully auto-created new user");
1080 * OpenID is verified, but the desired username either was not specified or
1081 * conflicts with an existing user. Manual account creation is required.
1084 char *desired_name = NULL;
1085 cprintf("verify_only\n");
1086 cprintf("%s\n", ChrPtr(oiddata->claimed_id));
1087 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
1088 cprintf("%s\n", desired_name);
1093 syslog(LOG_DEBUG, "The desired Simple Registration name is already taken.");
1102 if (oiddata->sreg_keys != NULL) {
1103 DeleteHash(&oiddata->sreg_keys);
1104 oiddata->sreg_keys = NULL;
1106 oiddata->sreg_keys = keys;
1111 /**************************************************************************/
1113 /* Functions in this section handle module initialization and shutdown */
1115 /**************************************************************************/
1120 CTDL_MODULE_INIT(openid_rp)
1123 curl_global_init(CURL_GLOBAL_ALL);
1125 /* Only enable the OpenID command set when native mode authentication is in use. */
1126 if (config.c_auth_mode == AUTHMODE_NATIVE) {
1127 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
1128 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
1129 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
1130 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
1131 CtdlRegisterProtoHook(cmd_oidc, "OIDC", "Create new user after validating OpenID");
1132 CtdlRegisterProtoHook(cmd_oida, "OIDA", "List all OpenIDs in the database");
1134 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
1135 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
1136 openid_level_supported = 1; /* This module supports OpenID 1.0 only */
1139 /* return our module name for the log */