citadel/modules/openid/serv_openid_rp.c

   1 /*
   2  * $Id$
   3  *
   4  * This is an implementation of OpenID 1.1 Relying Party support, in stateless mode.
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <pwd.h>
  15 #include <errno.h>
  16 #include <sys/types.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <sys/wait.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include <curl/curl.h>
  33 #include "ctdl_module.h"
  34 #include "config.h"
  35 #include "citserver.h"
  36 #include "user_ops.h"
  37
  38 struct ctdl_openid {
  39         char claimed_id[1024];
  40         char server[1024];
  41         int validated;
  42 };
  43
  44
  45
  46
  47
  48 /**************************************************************************/
  49 /*                                                                        */
  50 /* Functions in this section handle Citadel internal OpenID mapping stuff */
  51 /*                                                                        */
  52 /**************************************************************************/
  53
  54
  55 /*
  56  * The structure of an openid record *key* is:
  57  *
  58  * |--------------claimed_id-------------|
  59  *     (auctual length of claimed id)
  60  *
  61  *
  62  * The structure of an openid record *value* is:
  63  *
  64  * |-----user_number----|------------claimed_id---------------|
  65  *    (sizeof long)          (actual length of claimed id)
  66  *
  67  */
  68
  69
  70 /*
  71  * Attach an OpenID to a Citadel account
  72  */
  73 int attach_openid(struct ctdluser *who, char *claimed_id)
  74 {
  75         struct cdbdata *cdboi;
  76         long fetched_usernum;
  77         char *data;
  78         int data_len;
  79
  80         if (!who) return(1);
  81         if (!claimed_id) return(1);
  82         if (IsEmptyStr(claimed_id)) return(1);
  83
  84         /* Check to see if this OpenID is already in the database */
  85
  86         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
  87         if (cdboi != NULL) {
  88                 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
  89                 cdb_free(cdboi);
  90
  91                 if (fetched_usernum == who->usernum) {
  92                         CtdlLogPrintf(CTDL_INFO, "%s already associated; no action is taken\n", claimed_id);
  93                         return(0);
  94                 }
  95                 else {
  96                         CtdlLogPrintf(CTDL_INFO, "%s already belongs to another user\n", claimed_id);
  97                         return(3);
  98                 }
  99         }
 100
 101         /* Not already in the database, so attach it now */
 102
 103         data_len = sizeof(long) + strlen(claimed_id) + 1;
 104         data = malloc(data_len);
 105
 106         memcpy(data, &who->usernum, sizeof(long));
 107         memcpy(&data[sizeof(long)], claimed_id, strlen(claimed_id) + 1);
 108
 109         cdb_store(CDB_OPENID, claimed_id, strlen(claimed_id), data, data_len);
 110         free(data);
 111
 112         CtdlLogPrintf(CTDL_INFO, "%s has been associated with %s (%ld)\n",
 113                 claimed_id, who->fullname, who->usernum);
 114         return(0);
 115 }
 116
 117
 118 /*
 119  * When a user is being deleted, we have to delete any OpenID associations
 120  */
 121 void openid_purge(struct ctdluser *usbuf) {
 122         /* FIXME finish this */
 123 }
 124
 125
 126
 127 /*
 128  * List the OpenIDs associated with the currently logged in account
 129  */
 130 void cmd_oidl(char *argbuf) {
 131         struct cdbdata *cdboi;
 132
 133         if (CtdlAccessCheck(ac_logged_in)) return;
 134         cdb_rewind(CDB_OPENID);
 135         cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
 136
 137         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 138                 if (cdboi->len > sizeof(long)) {
 139                 cprintf("%s\n", cdboi->ptr + sizeof(long));
 140                 }
 141         }
 142         cprintf("000\n");
 143 }
 144
 145
 146
 147 /*
 148  * getuserbyopenid() works the same way as getuser() and getuserbynumber().
 149  * If a user account exists which is associated with the Claimed ID, it fills usbuf and returns zero.
 150  * Otherwise it returns nonzero.
 151  */
 152 int getuserbyopenid(struct ctdluser *usbuf, char *claimed_id)
 153 {
 154         struct cdbdata *cdboi;
 155         long usernum = 0;
 156
 157         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 158         if (cdboi == NULL) {
 159                 return(-1);
 160         }
 161
 162         memcpy(&usernum, cdboi->ptr, sizeof(long));
 163         cdb_free(cdboi);
 164
 165         return(getuserbynumber(usbuf, usernum));
 166 }
 167
 168
 169
 170 /**************************************************************************/
 171 /*                                                                        */
 172 /* Functions in this section handle OpenID protocol                       */
 173 /*                                                                        */
 174 /**************************************************************************/
 175
 176
 177 /*
 178  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 179  */
 180 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 181 {
 182         char *ptr = source_buf;
 183
 184         if (!target_buf) return;
 185         if (!rel) return;
 186         if (!source_buf) return;
 187
 188         target_buf[0] = 0;
 189
 190         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 191
 192                 char work_buffer[2048];
 193                 char *link_tag_start = NULL;
 194                 char *link_tag_end = NULL;
 195
 196                 char rel_tag[2048];
 197                 char href_tag[2048];
 198
 199                 link_tag_start = ptr;
 200                 link_tag_end = strchr(ptr, '>');
 201                 rel_tag[0] = 0;
 202                 href_tag[0] = 0;
 203
 204                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 205                         int len;
 206                         len = link_tag_end - link_tag_start;
 207                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 208                         memcpy(work_buffer, link_tag_start, len);
 209
 210                         char *rel_start = NULL;
 211                         char *rel_end = NULL;
 212                         rel_start = bmstrcasestr(work_buffer, "rel=");
 213                         if (rel_start) {
 214                                 rel_start = strchr(rel_start, '\"');
 215                                 if (rel_start) {
 216                                         ++rel_start;
 217                                         rel_end = strchr(rel_start, '\"');
 218                                         if ((rel_end) && (rel_end > rel_start)) {
 219                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 220                                         }
 221                                 }
 222                         }
 223
 224                         char *href_start = NULL;
 225                         char *href_end = NULL;
 226                         href_start = bmstrcasestr(work_buffer, "href=");
 227                         if (href_start) {
 228                                 href_start = strchr(href_start, '\"');
 229                                 if (href_start) {
 230                                         ++href_start;
 231                                         href_end = strchr(href_start, '\"');
 232                                         if ((href_end) && (href_end > href_start)) {
 233                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 234                                         }
 235                                 }
 236                         }
 237
 238                         if (!strcasecmp(rel, rel_tag)) {
 239                                 safestrncpy(target_buf, href_tag, target_size);
 240                                 return;
 241                         }
 242
 243                 }
 244
 245         ++ptr;
 246         }
 247
 248
 249 }
 250
 251
 252
 253 struct fh_data {
 254         char *buf;
 255         int total_bytes_received;
 256         int maxbytes;
 257 };
 258
 259
 260 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 261 {
 262         struct fh_data *fh = (struct fh_data *) stream;
 263         int got_bytes = (size * nmemb);
 264
 265         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 266                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 267         }
 268         if (got_bytes > 0) {
 269                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 270                 fh->total_bytes_received += got_bytes;
 271         }
 272
 273         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 274 }
 275
 276
 277
 278 /*
 279  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 280  *
 281  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 282  * requesting that the effective (normalized) URL be copied back to it.
 283  */
 284 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 285 {
 286         CURL *curl;
 287         CURLcode res;
 288         char errmsg[1024] = "";
 289         struct fh_data fh = {
 290                 target_buf,
 291                 0,
 292                 maxbytes
 293         };
 294         char *effective_url = NULL;
 295
 296         if (!url) return(-1);
 297         if (!target_buf) return(-1);
 298         memset(target_buf, 0, maxbytes);
 299
 300         curl = curl_easy_init();
 301         if (!curl) {
 302                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 303                 return(-1);
 304         }
 305
 306         curl_easy_setopt(curl, CURLOPT_URL, url);
 307         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 308         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 309         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 310         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 311         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 312         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 313         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 314         if (!IsEmptyStr(config.c_ip_addr)) {
 315                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 316         }
 317         res = curl_easy_perform(curl);
 318         if (res) {
 319                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 320         }
 321         if (normalize_len > 0) {
 322                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 323                 safestrncpy(url, effective_url, normalize_len);
 324         }
 325         curl_easy_cleanup(curl);
 326         return fh.total_bytes_received;
 327 }
 328
 329
 330 /*
 331  * Setup an OpenID authentication
 332  */
 333 void cmd_oids(char *argbuf) {
 334         char return_to[1024];
 335         char trust_root[1024];
 336         int i;
 337         char buf[SIZ];
 338         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 339         struct ctdl_openid *oiddata;
 340
 341         /* commented out because we may be attempting to attach an OpenID to
 342          * an existing account that is logged in
 343          *
 344         if (CCC->logged_in) {
 345                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 346                 return;
 347         }
 348          */
 349
 350         if (CCC->openid_data != NULL) {
 351                 free(CCC->openid_data);
 352         }
 353         oiddata = malloc(sizeof(struct ctdl_openid));
 354         if (oiddata == NULL) {
 355                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 356                 return;
 357         }
 358         memset(oiddata, 0, sizeof(struct ctdl_openid));
 359         CCC->openid_data = (void *) oiddata;
 360
 361         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 362         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 363         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 364         oiddata->validated = 0;
 365
 366         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 367         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 368         buf[sizeof buf - 1] = 0;
 369         if (i > 0) {
 370                 char openid_delegate[1024];
 371
 372                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 373                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 374
 375                 if (IsEmptyStr(oiddata->server)) {
 376                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 377                         return;
 378                 }
 379
 380                 /* Empty delegate is legal; we just use the openid_url instead */
 381                 if (IsEmptyStr(openid_delegate)) {
 382                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 383                 }
 384
 385                 /* Assemble a URL to which the user-agent will be redirected. */
 386                 char redirect_string[4096];
 387                 char escaped_identity[512];
 388                 char escaped_return_to[2048];
 389                 char escaped_trust_root[1024];
 390                 char escaped_sreg_optional[256];
 391
 392                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 393                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 394                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 395                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 396                         "nickname,email,fullname,postcode,country");
 397
 398                 snprintf(redirect_string, sizeof redirect_string,
 399                         "%s"
 400                         "?openid.mode=checkid_setup"
 401                         "&openid.identity=%s"
 402                         "&openid.return_to=%s"
 403                         "&openid.trust_root=%s"
 404                         "&openid.sreg.optional=%s"
 405                         ,
 406                         oiddata->server,
 407                         escaped_identity,
 408                         escaped_return_to,
 409                         escaped_trust_root,
 410                         escaped_sreg_optional
 411                 );
 412                 cprintf("%d %s\n", CIT_OK, redirect_string);
 413                 return;
 414         }
 415
 416         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 417 }
 418
 419
 420
 421 /*
 422  * Callback function to free a pointer (used below in the hash list)
 423  */
 424 void free_oid_key(void *ptr) {
 425         free(ptr);
 426 }
 427
 428
 429 /*
 430  * Finalize an OpenID authentication
 431  */
 432 void cmd_oidf(char *argbuf) {
 433         char buf[2048];
 434         char thiskey[1024];
 435         char thisdata[1024];
 436         HashList *keys = NULL;
 437         HashPos *HashPos;
 438         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 439
 440         keys = NewHash(1, NULL);
 441         if (!keys) {
 442                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 443                 return;
 444         }
 445
 446         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 447
 448         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 449                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 450                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 451                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 452                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), free_oid_key);
 453         }
 454
 455
 456         /* Now that we have all of the parameters, we have to validate the signature against the server */
 457         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 458
 459         CURL *curl;
 460         CURLcode res;
 461         struct curl_httppost *formpost = NULL;
 462         struct curl_httppost *lastptr = NULL;
 463         char errmsg[1024] = "";
 464         char *o_assoc_handle = NULL;
 465         char *o_sig = NULL;
 466         char *o_signed = NULL;
 467         int num_signed_values;
 468         int i;
 469         char k_keyname[128];
 470         char k_o_keyname[128];
 471         char *k_value = NULL;
 472         char valbuf[1024];
 473
 474         struct fh_data fh = {
 475                 valbuf,
 476                 0,
 477                 sizeof valbuf
 478         };
 479
 480         curl_formadd(&formpost, &lastptr,
 481                 CURLFORM_COPYNAME,      "openid.mode",
 482                 CURLFORM_COPYCONTENTS,  "check_authentication",
 483                 CURLFORM_END);
 484         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 485
 486         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 487                 curl_formadd(&formpost, &lastptr,
 488                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 489                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 490                         CURLFORM_END);
 491                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 492         }
 493
 494         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 495                 curl_formadd(&formpost, &lastptr,
 496                         CURLFORM_COPYNAME,      "openid.sig",
 497                         CURLFORM_COPYCONTENTS,  o_sig,
 498                         CURLFORM_END);
 499                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 500         }
 501
 502         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 503                 curl_formadd(&formpost, &lastptr,
 504                         CURLFORM_COPYNAME,      "openid.signed",
 505                         CURLFORM_COPYCONTENTS,  o_signed,
 506                         CURLFORM_END);
 507                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 508
 509                 num_signed_values = num_tokens(o_signed, ',');
 510                 for (i=0; i<num_signed_values; ++i) {
 511                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 512                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 513                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 514                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 515                                         curl_formadd(&formpost, &lastptr,
 516                                                 CURLFORM_COPYNAME,      k_o_keyname,
 517                                                 CURLFORM_COPYCONTENTS,  k_value,
 518                                                 CURLFORM_END);
 519                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 520                                 }
 521                                 else {
 522                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 523                                                 k_keyname);
 524                                 }
 525                         }
 526                 }
 527         }
 528
 529         curl = curl_easy_init();
 530         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 531         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 532         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 533         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 534         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 535         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 536         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 537         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 538         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 539         if (!IsEmptyStr(config.c_ip_addr)) {
 540                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 541         }
 542
 543         res = curl_easy_perform(curl);
 544         if (res) {
 545                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 546         }
 547         curl_easy_cleanup(curl);
 548         curl_formfree(formpost);
 549
 550         valbuf[fh.total_bytes_received] = 0;
 551
 552         if (bmstrcasestr(valbuf, "is_valid:true")) {
 553                 oiddata->validated = 1;
 554         }
 555
 556         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->validated ? "succeeded" : "failed") );
 557
 558         /* Respond to the client */
 559
 560         if (oiddata->validated) {
 561
 562                 /* If we were already logged in, attach the OpenID to the user's account */
 563                 if (CC->logged_in) {
 564                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 565                                 cprintf("attach\n");
 566                         }
 567                         else {
 568                                 cprintf("fail\n");
 569                         }
 570                 }
 571
 572                 /* Otherwise, a user is attempting to log in using the validated OpenID */
 573                 else {
 574                         struct ctdluser usbuf;
 575
 576                         /*
 577                          * Existing user who has claimed this OpenID?
 578                          *
 579                          * Note: if you think that sending the password back over the wire is insecure,
 580                          * check your assumptions.  If someone has successfully asserted an OpenID that
 581                          * is associated with the account, they already have password equivalency and can
 582                          * login, so they could just as easily change the password, etc.
 583                          */
 584                         if (getuserbyopenid(&usbuf, oiddata->claimed_id) == 0) {
 585                                 cprintf("authenticate\n%s\n%s\n", usbuf.fullname, usbuf.password);
 586                         }
 587
 588                         else {
 589                                 cprintf("fail\n");              // FIXME do the login here!!
 590                         }
 591                 }
 592         }
 593         else {
 594                 cprintf("fail\n");
 595         }
 596         cprintf("000\n");
 597
 598         /* Free the hash list */
 599         long len;
 600         void *Value;
 601         char *Key;
 602
 603         HashPos = GetNewHashPos();
 604         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 605         {
 606                 free(Value);
 607         }
 608         DeleteHashPos(&HashPos);
 609 }
 610
 611
 612 // mode = [6]  id_res
 613 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 614 // assoc_handle = [26]  6ekac3ju181tgepk7v4h9r7ui7
 615 // return_to = [42]  http://jemcaterers.net/finish_openid_login
 616 // sreg.nickname = [17]  IGnatius T Foobar
 617 // sreg.email = [26]  ajc@uncensored.citadel.org
 618 // sreg.fullname = [10]  Art Cancro
 619 // sreg.postcode = [5]  10549
 620 // sreg.country = [2]  US
 621 // signed = [102]  mode,identity,assoc_handle,return_to,sreg.nickname,sreg.email,sreg.fullname,sreg.postcode,sreg.country
 622 // sig = [28]  vixxxU4MAqWfxxxxCfrHv3TxxxhEw=
 623
 624
 625
 626
 627 /**************************************************************************/
 628 /*                                                                        */
 629 /* Functions in this section handle module initialization and shutdown    */
 630 /*                                                                        */
 631 /**************************************************************************/
 632
 633
 634 /*
 635  * This cleanup function blows away the temporary memory used by this module.
 636  */
 637 void openid_cleanup_function(void) {
 638
 639         if (CC->openid_data != NULL) {
 640                 free(CC->openid_data);
 641         }
 642 }
 643
 644
 645 CTDL_MODULE_INIT(openid_rp)
 646 {
 647         if (!threading)
 648         {
 649                 curl_global_init(CURL_GLOBAL_ALL);
 650                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 651                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 652                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 653                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP);
 654                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 655         }
 656
 657         /* return our Subversion id for the Log */
 658         return "$Id$";
 659 }
 660
 661
 662 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 663