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                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 140                                 cprintf("%s\n", cdboi->ptr + sizeof(long));
 141                         }
 142                 }
 143         }
 144         cprintf("000\n");
 145 }
 146
 147
 148
 149 /*
 150  * Detach an OpenID from the currently logged in account
 151  */
 152 void cmd_oidd(char *argbuf) {
 153         struct cdbdata *cdboi;
 154         char id_to_detach[1024];
 155         int this_is_mine = 0;
 156
 157         if (CtdlAccessCheck(ac_logged_in)) return;
 158         extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
 159         if (IsEmptyStr(id_to_detach)) {
 160                 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
 161         }
 162
 163         cdb_rewind(CDB_OPENID);
 164         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 165                 if (cdboi->len > sizeof(long)) {
 166                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 167                                 this_is_mine = 1;
 168                         }
 169                 }
 170         }
 171
 172         if (!this_is_mine) {
 173                 cprintf("%d That OpenID was not found or not associated with your account.\n",
 174                         ERROR + ILLEGAL_VALUE);
 175                 return;
 176         }
 177
 178         cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
 179         cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
 180 }
 181
 182
 183
 184 /*
 185  * getuserbyopenid() works the same way as getuser() and getuserbynumber().
 186  * If a user account exists which is associated with the Claimed ID, it fills usbuf and returns zero.
 187  * Otherwise it returns nonzero.
 188  */
 189 int getuserbyopenid(struct ctdluser *usbuf, char *claimed_id)
 190 {
 191         struct cdbdata *cdboi;
 192         long usernum = 0;
 193
 194         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 195         if (cdboi == NULL) {
 196                 return(-1);
 197         }
 198
 199         memcpy(&usernum, cdboi->ptr, sizeof(long));
 200         cdb_free(cdboi);
 201
 202         return(getuserbynumber(usbuf, usernum));
 203 }
 204
 205
 206
 207 /**************************************************************************/
 208 /*                                                                        */
 209 /* Functions in this section handle OpenID protocol                       */
 210 /*                                                                        */
 211 /**************************************************************************/
 212
 213
 214 /*
 215  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 216  */
 217 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 218 {
 219         char *ptr = source_buf;
 220
 221         if (!target_buf) return;
 222         if (!rel) return;
 223         if (!source_buf) return;
 224
 225         target_buf[0] = 0;
 226
 227         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 228
 229                 char work_buffer[2048];
 230                 char *link_tag_start = NULL;
 231                 char *link_tag_end = NULL;
 232
 233                 char rel_tag[2048];
 234                 char href_tag[2048];
 235
 236                 link_tag_start = ptr;
 237                 link_tag_end = strchr(ptr, '>');
 238                 rel_tag[0] = 0;
 239                 href_tag[0] = 0;
 240
 241                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 242                         int len;
 243                         len = link_tag_end - link_tag_start;
 244                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 245                         memcpy(work_buffer, link_tag_start, len);
 246
 247                         char *rel_start = NULL;
 248                         char *rel_end = NULL;
 249                         rel_start = bmstrcasestr(work_buffer, "rel=");
 250                         if (rel_start) {
 251                                 rel_start = strchr(rel_start, '\"');
 252                                 if (rel_start) {
 253                                         ++rel_start;
 254                                         rel_end = strchr(rel_start, '\"');
 255                                         if ((rel_end) && (rel_end > rel_start)) {
 256                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 257                                         }
 258                                 }
 259                         }
 260
 261                         char *href_start = NULL;
 262                         char *href_end = NULL;
 263                         href_start = bmstrcasestr(work_buffer, "href=");
 264                         if (href_start) {
 265                                 href_start = strchr(href_start, '\"');
 266                                 if (href_start) {
 267                                         ++href_start;
 268                                         href_end = strchr(href_start, '\"');
 269                                         if ((href_end) && (href_end > href_start)) {
 270                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 271                                         }
 272                                 }
 273                         }
 274
 275                         if (!strcasecmp(rel, rel_tag)) {
 276                                 safestrncpy(target_buf, href_tag, target_size);
 277                                 return;
 278                         }
 279
 280                 }
 281
 282         ++ptr;
 283         }
 284
 285
 286 }
 287
 288
 289
 290 struct fh_data {
 291         char *buf;
 292         int total_bytes_received;
 293         int maxbytes;
 294 };
 295
 296
 297 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 298 {
 299         struct fh_data *fh = (struct fh_data *) stream;
 300         int got_bytes = (size * nmemb);
 301
 302         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 303                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 304         }
 305         if (got_bytes > 0) {
 306                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 307                 fh->total_bytes_received += got_bytes;
 308         }
 309
 310         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 311 }
 312
 313
 314
 315 /*
 316  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 317  *
 318  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 319  * requesting that the effective (normalized) URL be copied back to it.
 320  */
 321 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 322 {
 323         CURL *curl;
 324         CURLcode res;
 325         char errmsg[1024] = "";
 326         struct fh_data fh = {
 327                 target_buf,
 328                 0,
 329                 maxbytes
 330         };
 331         char *effective_url = NULL;
 332
 333         if (!url) return(-1);
 334         if (!target_buf) return(-1);
 335         memset(target_buf, 0, maxbytes);
 336
 337         curl = curl_easy_init();
 338         if (!curl) {
 339                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 340                 return(-1);
 341         }
 342
 343         curl_easy_setopt(curl, CURLOPT_URL, url);
 344         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 345         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 346         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 347         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 348         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 349         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 350         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 351         if (!IsEmptyStr(config.c_ip_addr)) {
 352                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 353         }
 354         res = curl_easy_perform(curl);
 355         if (res) {
 356                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 357         }
 358         if (normalize_len > 0) {
 359                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 360                 safestrncpy(url, effective_url, normalize_len);
 361         }
 362         curl_easy_cleanup(curl);
 363         return fh.total_bytes_received;
 364 }
 365
 366
 367 /*
 368  * Setup an OpenID authentication
 369  */
 370 void cmd_oids(char *argbuf) {
 371         char return_to[1024];
 372         char trust_root[1024];
 373         int i;
 374         char buf[SIZ];
 375         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 376         struct ctdl_openid *oiddata;
 377
 378         /* commented out because we may be attempting to attach an OpenID to
 379          * an existing account that is logged in
 380          *
 381         if (CCC->logged_in) {
 382                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 383                 return;
 384         }
 385          */
 386
 387         if (CCC->openid_data != NULL) {
 388                 free(CCC->openid_data);
 389         }
 390         oiddata = malloc(sizeof(struct ctdl_openid));
 391         if (oiddata == NULL) {
 392                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 393                 return;
 394         }
 395         memset(oiddata, 0, sizeof(struct ctdl_openid));
 396         CCC->openid_data = (void *) oiddata;
 397
 398         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 399         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 400         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 401         oiddata->validated = 0;
 402
 403         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 404         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 405         buf[sizeof buf - 1] = 0;
 406         if (i > 0) {
 407                 char openid_delegate[1024];
 408
 409                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 410                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 411
 412                 if (IsEmptyStr(oiddata->server)) {
 413                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 414                         return;
 415                 }
 416
 417                 /* Empty delegate is legal; we just use the openid_url instead */
 418                 if (IsEmptyStr(openid_delegate)) {
 419                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 420                 }
 421
 422                 /* Assemble a URL to which the user-agent will be redirected. */
 423                 char redirect_string[4096];
 424                 char escaped_identity[512];
 425                 char escaped_return_to[2048];
 426                 char escaped_trust_root[1024];
 427                 char escaped_sreg_optional[256];
 428
 429                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 430                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 431                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 432                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 433                         "nickname,email,fullname,postcode,country");
 434
 435                 snprintf(redirect_string, sizeof redirect_string,
 436                         "%s"
 437                         "?openid.mode=checkid_setup"
 438                         "&openid.identity=%s"
 439                         "&openid.return_to=%s"
 440                         "&openid.trust_root=%s"
 441                         "&openid.sreg.optional=%s"
 442                         ,
 443                         oiddata->server,
 444                         escaped_identity,
 445                         escaped_return_to,
 446                         escaped_trust_root,
 447                         escaped_sreg_optional
 448                 );
 449                 cprintf("%d %s\n", CIT_OK, redirect_string);
 450                 return;
 451         }
 452
 453         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 454 }
 455
 456
 457
 458 /*
 459  * Callback function to free a pointer (used below in the hash list)
 460  */
 461 void free_oid_key(void *ptr) {
 462         free(ptr);
 463 }
 464
 465
 466 /*
 467  * Finalize an OpenID authentication
 468  */
 469 void cmd_oidf(char *argbuf) {
 470         char buf[2048];
 471         char thiskey[1024];
 472         char thisdata[1024];
 473         HashList *keys = NULL;
 474         HashPos *HashPos;
 475         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 476
 477         keys = NewHash(1, NULL);
 478         if (!keys) {
 479                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 480                 return;
 481         }
 482
 483         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 484
 485         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 486                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 487                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 488                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 489                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), free_oid_key);
 490         }
 491
 492
 493         /* Now that we have all of the parameters, we have to validate the signature against the server */
 494         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 495
 496         CURL *curl;
 497         CURLcode res;
 498         struct curl_httppost *formpost = NULL;
 499         struct curl_httppost *lastptr = NULL;
 500         char errmsg[1024] = "";
 501         char *o_assoc_handle = NULL;
 502         char *o_sig = NULL;
 503         char *o_signed = NULL;
 504         int num_signed_values;
 505         int i;
 506         char k_keyname[128];
 507         char k_o_keyname[128];
 508         char *k_value = NULL;
 509         char valbuf[1024];
 510
 511         struct fh_data fh = {
 512                 valbuf,
 513                 0,
 514                 sizeof valbuf
 515         };
 516
 517         curl_formadd(&formpost, &lastptr,
 518                 CURLFORM_COPYNAME,      "openid.mode",
 519                 CURLFORM_COPYCONTENTS,  "check_authentication",
 520                 CURLFORM_END);
 521         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 522
 523         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 524                 curl_formadd(&formpost, &lastptr,
 525                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 526                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 527                         CURLFORM_END);
 528                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 529         }
 530
 531         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 532                 curl_formadd(&formpost, &lastptr,
 533                         CURLFORM_COPYNAME,      "openid.sig",
 534                         CURLFORM_COPYCONTENTS,  o_sig,
 535                         CURLFORM_END);
 536                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 537         }
 538
 539         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 540                 curl_formadd(&formpost, &lastptr,
 541                         CURLFORM_COPYNAME,      "openid.signed",
 542                         CURLFORM_COPYCONTENTS,  o_signed,
 543                         CURLFORM_END);
 544                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 545
 546                 num_signed_values = num_tokens(o_signed, ',');
 547                 for (i=0; i<num_signed_values; ++i) {
 548                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 549                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 550                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 551                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 552                                         curl_formadd(&formpost, &lastptr,
 553                                                 CURLFORM_COPYNAME,      k_o_keyname,
 554                                                 CURLFORM_COPYCONTENTS,  k_value,
 555                                                 CURLFORM_END);
 556                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 557                                 }
 558                                 else {
 559                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 560                                                 k_keyname);
 561                                 }
 562                         }
 563                 }
 564         }
 565
 566         curl = curl_easy_init();
 567         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 568         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 569         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 570         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 571         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 572         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 573         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 574         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 575         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 576         if (!IsEmptyStr(config.c_ip_addr)) {
 577                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 578         }
 579
 580         res = curl_easy_perform(curl);
 581         if (res) {
 582                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 583         }
 584         curl_easy_cleanup(curl);
 585         curl_formfree(formpost);
 586
 587         valbuf[fh.total_bytes_received] = 0;
 588
 589         if (bmstrcasestr(valbuf, "is_valid:true")) {
 590                 oiddata->validated = 1;
 591         }
 592
 593         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->validated ? "succeeded" : "failed") );
 594
 595         /* Respond to the client */
 596
 597         if (oiddata->validated) {
 598
 599                 /* If we were already logged in, attach the OpenID to the user's account */
 600                 if (CC->logged_in) {
 601                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 602                                 cprintf("attach\n");
 603                         }
 604                         else {
 605                                 cprintf("fail\n");
 606                         }
 607                 }
 608
 609                 /* Otherwise, a user is attempting to log in using the validated OpenID */
 610                 else {
 611                         struct ctdluser usbuf;
 612
 613                         /*
 614                          * Existing user who has claimed this OpenID?
 615                          *
 616                          * Note: if you think that sending the password back over the wire is insecure,
 617                          * check your assumptions.  If someone has successfully asserted an OpenID that
 618                          * is associated with the account, they already have password equivalency and can
 619                          * login, so they could just as easily change the password, etc.
 620                          */
 621                         if (getuserbyopenid(&usbuf, oiddata->claimed_id) == 0) {
 622                                 cprintf("authenticate\n%s\n%s\n", usbuf.fullname, usbuf.password);
 623                         }
 624
 625                         else {
 626                                 cprintf("fail\n");              // FIXME do the login here!!
 627                         }
 628                 }
 629         }
 630         else {
 631                 cprintf("fail\n");
 632         }
 633         cprintf("000\n");
 634
 635         /* Free the hash list */
 636         long len;
 637         void *Value;
 638         char *Key;
 639
 640         HashPos = GetNewHashPos();
 641         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 642         {
 643                 free(Value);
 644         }
 645         DeleteHashPos(&HashPos);
 646 }
 647
 648
 649 // mode = [6]  id_res
 650 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 651 // assoc_handle = [26]  6ekac3ju181tgepk7v4h9r7ui7
 652 // return_to = [42]  http://jemcaterers.net/finish_openid_login
 653 // sreg.nickname = [17]  IGnatius T Foobar
 654 // sreg.email = [26]  ajc@uncensored.citadel.org
 655 // sreg.fullname = [10]  Art Cancro
 656 // sreg.postcode = [5]  10549
 657 // sreg.country = [2]  US
 658 // signed = [102]  mode,identity,assoc_handle,return_to,sreg.nickname,sreg.email,sreg.fullname,sreg.postcode,sreg.country
 659 // sig = [28]  vixxxU4MAqWfxxxxCfrHv3TxxxhEw=
 660
 661
 662
 663
 664 /**************************************************************************/
 665 /*                                                                        */
 666 /* Functions in this section handle module initialization and shutdown    */
 667 /*                                                                        */
 668 /**************************************************************************/
 669
 670
 671 /*
 672  * This cleanup function blows away the temporary memory used by this module.
 673  */
 674 void openid_cleanup_function(void) {
 675
 676         if (CC->openid_data != NULL) {
 677                 free(CC->openid_data);
 678         }
 679 }
 680
 681
 682 CTDL_MODULE_INIT(openid_rp)
 683 {
 684         if (!threading)
 685         {
 686                 curl_global_init(CURL_GLOBAL_ALL);
 687                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 688                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 689                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 690                 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
 691                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP);
 692                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 693         }
 694
 695         /* return our Subversion id for the Log */
 696         return "$Id$";
 697 }
 698
 699
 700 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 701