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  *     (actual 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 /*
  72  * Attach an OpenID to a Citadel account
  73  */
  74 int attach_openid(struct ctdluser *who, char *claimed_id)
  75 {
  76         struct cdbdata *cdboi;
  77         long fetched_usernum;
  78         char *data;
  79         int data_len;
  80
  81         if (!who) return(1);
  82         if (!claimed_id) return(1);
  83         if (IsEmptyStr(claimed_id)) return(1);
  84
  85         /* Check to see if this OpenID is already in the database */
  86
  87         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
  88         if (cdboi != NULL) {
  89                 memcpy(&fetched_usernum, cdboi->ptr, sizeof(long));
  90                 cdb_free(cdboi);
  91
  92                 if (fetched_usernum == who->usernum) {
  93                         CtdlLogPrintf(CTDL_INFO, "%s already associated; no action is taken\n", claimed_id);
  94                         return(0);
  95                 }
  96                 else {
  97                         CtdlLogPrintf(CTDL_INFO, "%s already belongs to another user\n", claimed_id);
  98                         return(3);
  99                 }
 100         }
 101
 102         /* Not already in the database, so attach it now */
 103
 104         data_len = sizeof(long) + strlen(claimed_id) + 1;
 105         data = malloc(data_len);
 106
 107         memcpy(data, &who->usernum, sizeof(long));
 108         memcpy(&data[sizeof(long)], claimed_id, strlen(claimed_id) + 1);
 109
 110         cdb_store(CDB_OPENID, claimed_id, strlen(claimed_id), data, data_len);
 111         free(data);
 112
 113         CtdlLogPrintf(CTDL_INFO, "%s has been associated with %s (%ld)\n",
 114                 claimed_id, who->fullname, who->usernum);
 115         return(0);
 116 }
 117
 118
 119 /*
 120  * When a user is being deleted, we have to delete any OpenID associations
 121  */
 122 void openid_purge(struct ctdluser *usbuf) {
 123         struct cdbdata *cdboi;
 124         HashList *keys = NULL;
 125         HashPos *HashPos;
 126         char *deleteme = NULL;
 127         long len;
 128         void *Value;
 129         char *Key;
 130
 131         keys = NewHash(1, NULL);
 132         if (!keys) return;
 133
 134
 135         cdb_rewind(CDB_OPENID);
 136         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 137                 if (cdboi->len > sizeof(long)) {
 138                         if (((long)*(cdboi->ptr)) == usbuf->usernum) {
 139                                 deleteme = strdup(cdboi->ptr + sizeof(long)),
 140                                 Put(keys, deleteme, strlen(deleteme), deleteme, generic_free_handler);
 141                         }
 142                 }
 143                 cdb_free(cdboi);
 144         }
 145
 146         /* Go through the hash list, deleting keys we stored in it */
 147
 148         HashPos = GetNewHashPos();
 149         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 150         {
 151                 CtdlLogPrintf(CTDL_DEBUG, "Deleting associated OpenID <%s>\n", Value);
 152                 cdb_delete(CDB_OPENID, Value, strlen(Value));
 153                 /* note: don't free(Value) -- deleting the hash list will handle this for us */
 154         }
 155         DeleteHashPos(&HashPos);
 156         DeleteHash(&keys);
 157 }
 158
 159
 160
 161 /*
 162  * List the OpenIDs associated with the currently logged in account
 163  */
 164 void cmd_oidl(char *argbuf) {
 165         struct cdbdata *cdboi;
 166
 167         if (CtdlAccessCheck(ac_logged_in)) return;
 168         cdb_rewind(CDB_OPENID);
 169         cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
 170
 171         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 172                 if (cdboi->len > sizeof(long)) {
 173                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 174                                 cprintf("%s\n", cdboi->ptr + sizeof(long));
 175                         }
 176                 }
 177                 cdb_free(cdboi);
 178         }
 179         cprintf("000\n");
 180 }
 181
 182
 183
 184 /*
 185  * Detach an OpenID from the currently logged in account
 186  */
 187 void cmd_oidd(char *argbuf) {
 188         struct cdbdata *cdboi;
 189         char id_to_detach[1024];
 190         int this_is_mine = 0;
 191
 192         if (CtdlAccessCheck(ac_logged_in)) return;
 193         extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
 194         if (IsEmptyStr(id_to_detach)) {
 195                 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
 196         }
 197
 198         cdb_rewind(CDB_OPENID);
 199         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 200                 if (cdboi->len > sizeof(long)) {
 201                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 202                                 this_is_mine = 1;
 203                         }
 204                 }
 205                 cdb_free(cdboi);
 206         }
 207
 208         if (!this_is_mine) {
 209                 cprintf("%d That OpenID was not found or not associated with your account.\n",
 210                         ERROR + ILLEGAL_VALUE);
 211                 return;
 212         }
 213
 214         cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
 215         cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
 216 }
 217
 218
 219
 220 /*
 221  * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
 222  */
 223 int openid_create_user_via_sri(char *claimed_id, HashList *sri_keys)
 224 {
 225         char *desired_name = NULL;
 226
 227         if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
 228         if (config.c_disable_newu) return(2);
 229         if (CC->logged_in) return(3);
 230         if (!GetHash(sri_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
 231
 232         CtdlLogPrintf(CTDL_DEBUG, "The desired account name is <%s>\n", desired_name);
 233
 234         if (!getuser(&CC->user, desired_name)) {
 235                 CtdlLogPrintf(CTDL_DEBUG, "<%s> is already taken by another user.\n", desired_name);
 236                 memset(&CC->user, 0, sizeof(struct ctdluser));
 237                 return(5);
 238         }
 239
 240         /* The desired account name is available.  Create the account and log it in! */
 241         if (create_user(desired_name, 1)) return(6);
 242
 243         attach_openid(&CC->user, claimed_id);
 244         return(0);
 245 }
 246
 247
 248 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 249 // sreg.nickname = [17]  IGnatius T Foobar
 250 // sreg.email = [26]  ajc@uncensored.citadel.org
 251 // sreg.fullname = [10]  Art Cancro
 252 // sreg.postcode = [5]  10549
 253 // sreg.country = [2]  US
 254
 255
 256
 257 /*
 258  * If a user account exists which is associated with the Claimed ID, log it in and return zero.
 259  * Otherwise it returns nonzero.
 260  */
 261 int login_via_openid(char *claimed_id)
 262 {
 263         struct cdbdata *cdboi;
 264         long usernum = 0;
 265
 266         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 267         if (cdboi == NULL) {
 268                 return(-1);
 269         }
 270
 271         memcpy(&usernum, cdboi->ptr, sizeof(long));
 272         cdb_free(cdboi);
 273
 274         if (!getuserbynumber(&CC->user, usernum)) {
 275                 do_login();
 276                 return(0);
 277         }
 278         else {
 279                 memset(&CC->user, 0, sizeof(struct ctdluser));
 280                 return(-1);
 281         }
 282 }
 283
 284
 285
 286
 287 /**************************************************************************/
 288 /*                                                                        */
 289 /* Functions in this section handle OpenID protocol                       */
 290 /*                                                                        */
 291 /**************************************************************************/
 292
 293
 294 /*
 295  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 296  */
 297 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 298 {
 299         char *ptr = source_buf;
 300
 301         if (!target_buf) return;
 302         if (!rel) return;
 303         if (!source_buf) return;
 304
 305         target_buf[0] = 0;
 306
 307         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 308
 309                 char work_buffer[2048];
 310                 char *link_tag_start = NULL;
 311                 char *link_tag_end = NULL;
 312
 313                 char rel_tag[2048];
 314                 char href_tag[2048];
 315
 316                 link_tag_start = ptr;
 317                 link_tag_end = strchr(ptr, '>');
 318                 rel_tag[0] = 0;
 319                 href_tag[0] = 0;
 320
 321                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 322                         int len;
 323                         len = link_tag_end - link_tag_start;
 324                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 325                         memcpy(work_buffer, link_tag_start, len);
 326
 327                         char *rel_start = NULL;
 328                         char *rel_end = NULL;
 329                         rel_start = bmstrcasestr(work_buffer, "rel=");
 330                         if (rel_start) {
 331                                 rel_start = strchr(rel_start, '\"');
 332                                 if (rel_start) {
 333                                         ++rel_start;
 334                                         rel_end = strchr(rel_start, '\"');
 335                                         if ((rel_end) && (rel_end > rel_start)) {
 336                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 337                                         }
 338                                 }
 339                         }
 340
 341                         char *href_start = NULL;
 342                         char *href_end = NULL;
 343                         href_start = bmstrcasestr(work_buffer, "href=");
 344                         if (href_start) {
 345                                 href_start = strchr(href_start, '\"');
 346                                 if (href_start) {
 347                                         ++href_start;
 348                                         href_end = strchr(href_start, '\"');
 349                                         if ((href_end) && (href_end > href_start)) {
 350                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 351                                         }
 352                                 }
 353                         }
 354
 355                         if (!strcasecmp(rel, rel_tag)) {
 356                                 safestrncpy(target_buf, href_tag, target_size);
 357                                 return;
 358                         }
 359
 360                 }
 361
 362         ++ptr;
 363         }
 364
 365
 366 }
 367
 368
 369
 370 struct fh_data {
 371         char *buf;
 372         int total_bytes_received;
 373         int maxbytes;
 374 };
 375
 376
 377 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 378 {
 379         struct fh_data *fh = (struct fh_data *) stream;
 380         int got_bytes = (size * nmemb);
 381
 382         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 383                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 384         }
 385         if (got_bytes > 0) {
 386                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 387                 fh->total_bytes_received += got_bytes;
 388         }
 389
 390         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 391 }
 392
 393
 394
 395 /*
 396  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 397  *
 398  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 399  * requesting that the effective (normalized) URL be copied back to it.
 400  */
 401 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 402 {
 403         CURL *curl;
 404         CURLcode res;
 405         char errmsg[1024] = "";
 406         struct fh_data fh = {
 407                 target_buf,
 408                 0,
 409                 maxbytes
 410         };
 411         char *effective_url = NULL;
 412
 413         if (!url) return(-1);
 414         if (!target_buf) return(-1);
 415         memset(target_buf, 0, maxbytes);
 416
 417         curl = curl_easy_init();
 418         if (!curl) {
 419                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 420                 return(-1);
 421         }
 422
 423         curl_easy_setopt(curl, CURLOPT_URL, url);
 424         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 425         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 426         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 427         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 428         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 429         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 430         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 431         if (!IsEmptyStr(config.c_ip_addr)) {
 432                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 433         }
 434         res = curl_easy_perform(curl);
 435         if (res) {
 436                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 437         }
 438         if (normalize_len > 0) {
 439                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 440                 safestrncpy(url, effective_url, normalize_len);
 441         }
 442         curl_easy_cleanup(curl);
 443         return fh.total_bytes_received;
 444 }
 445
 446
 447 /*
 448  * Setup an OpenID authentication
 449  */
 450 void cmd_oids(char *argbuf) {
 451         char return_to[1024];
 452         char trust_root[1024];
 453         int i;
 454         char buf[SIZ];
 455         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 456         struct ctdl_openid *oiddata;
 457
 458         /* commented out because we may be attempting to attach an OpenID to
 459          * an existing account that is logged in
 460          *
 461         if (CCC->logged_in) {
 462                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 463                 return;
 464         }
 465          */
 466
 467         if (CCC->openid_data != NULL) {
 468                 free(CCC->openid_data);
 469         }
 470         oiddata = malloc(sizeof(struct ctdl_openid));
 471         if (oiddata == NULL) {
 472                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 473                 return;
 474         }
 475         memset(oiddata, 0, sizeof(struct ctdl_openid));
 476         CCC->openid_data = (void *) oiddata;
 477
 478         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 479         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 480         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 481         oiddata->validated = 0;
 482
 483         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 484         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 485         buf[sizeof buf - 1] = 0;
 486         if (i > 0) {
 487                 char openid_delegate[1024];
 488
 489                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 490                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 491
 492                 if (IsEmptyStr(oiddata->server)) {
 493                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 494                         return;
 495                 }
 496
 497                 /* Empty delegate is legal; we just use the openid_url instead */
 498                 if (IsEmptyStr(openid_delegate)) {
 499                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 500                 }
 501
 502                 /* Assemble a URL to which the user-agent will be redirected. */
 503                 char redirect_string[4096];
 504                 char escaped_identity[512];
 505                 char escaped_return_to[2048];
 506                 char escaped_trust_root[1024];
 507                 char escaped_sreg_optional[256];
 508
 509                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 510                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 511                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 512                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 513                         "nickname,email,fullname,postcode,country");
 514
 515                 snprintf(redirect_string, sizeof redirect_string,
 516                         "%s"
 517                         "?openid.mode=checkid_setup"
 518                         "&openid.identity=%s"
 519                         "&openid.return_to=%s"
 520                         "&openid.trust_root=%s"
 521                         "&openid.sreg.optional=%s"
 522                         ,
 523                         oiddata->server,
 524                         escaped_identity,
 525                         escaped_return_to,
 526                         escaped_trust_root,
 527                         escaped_sreg_optional
 528                 );
 529                 cprintf("%d %s\n", CIT_OK, redirect_string);
 530                 return;
 531         }
 532
 533         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 534 }
 535
 536
 537
 538
 539
 540 /*
 541  * Finalize an OpenID authentication
 542  */
 543 void cmd_oidf(char *argbuf) {
 544         char buf[2048];
 545         char thiskey[1024];
 546         char thisdata[1024];
 547         HashList *keys = NULL;
 548         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 549
 550         keys = NewHash(1, NULL);
 551         if (!keys) {
 552                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 553                 return;
 554         }
 555
 556         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 557
 558         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 559                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 560                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 561                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 562                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), generic_free_handler);
 563         }
 564
 565
 566         /* Now that we have all of the parameters, we have to validate the signature against the server */
 567         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 568
 569         CURL *curl;
 570         CURLcode res;
 571         struct curl_httppost *formpost = NULL;
 572         struct curl_httppost *lastptr = NULL;
 573         char errmsg[1024] = "";
 574         char *o_assoc_handle = NULL;
 575         char *o_sig = NULL;
 576         char *o_signed = NULL;
 577         int num_signed_values;
 578         int i;
 579         char k_keyname[128];
 580         char k_o_keyname[128];
 581         char *k_value = NULL;
 582         char valbuf[1024];
 583
 584         struct fh_data fh = {
 585                 valbuf,
 586                 0,
 587                 sizeof valbuf
 588         };
 589
 590         curl_formadd(&formpost, &lastptr,
 591                 CURLFORM_COPYNAME,      "openid.mode",
 592                 CURLFORM_COPYCONTENTS,  "check_authentication",
 593                 CURLFORM_END);
 594         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 595
 596         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 597                 curl_formadd(&formpost, &lastptr,
 598                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 599                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 600                         CURLFORM_END);
 601                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 602         }
 603
 604         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 605                 curl_formadd(&formpost, &lastptr,
 606                         CURLFORM_COPYNAME,      "openid.sig",
 607                         CURLFORM_COPYCONTENTS,  o_sig,
 608                         CURLFORM_END);
 609                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 610         }
 611
 612         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 613                 curl_formadd(&formpost, &lastptr,
 614                         CURLFORM_COPYNAME,      "openid.signed",
 615                         CURLFORM_COPYCONTENTS,  o_signed,
 616                         CURLFORM_END);
 617                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 618
 619                 num_signed_values = num_tokens(o_signed, ',');
 620                 for (i=0; i<num_signed_values; ++i) {
 621                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 622                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 623                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 624                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 625                                         curl_formadd(&formpost, &lastptr,
 626                                                 CURLFORM_COPYNAME,      k_o_keyname,
 627                                                 CURLFORM_COPYCONTENTS,  k_value,
 628                                                 CURLFORM_END);
 629                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 630                                 }
 631                                 else {
 632                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 633                                                 k_keyname);
 634                                 }
 635                         }
 636                 }
 637         }
 638
 639         curl = curl_easy_init();
 640         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 641         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 642         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 643         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 644         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 645         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 646         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 647         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 648         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 649         if (!IsEmptyStr(config.c_ip_addr)) {
 650                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 651         }
 652
 653         res = curl_easy_perform(curl);
 654         if (res) {
 655                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 656         }
 657         curl_easy_cleanup(curl);
 658         curl_formfree(formpost);
 659
 660         valbuf[fh.total_bytes_received] = 0;
 661
 662         if (bmstrcasestr(valbuf, "is_valid:true")) {
 663                 oiddata->validated = 1;
 664         }
 665
 666         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->validated ? "succeeded" : "failed") );
 667
 668         /* Respond to the client */
 669
 670         if (oiddata->validated) {
 671
 672                 /* If we were already logged in, attach the OpenID to the user's account */
 673                 if (CC->logged_in) {
 674                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 675                                 cprintf("attach\n");
 676                         }
 677                         else {
 678                                 cprintf("fail\n");
 679                         }
 680                 }
 681
 682                 /* Otherwise, a user is attempting to log in using the validated OpenID */
 683                 else {
 684                         /*
 685                          * Existing user who has claimed this OpenID?
 686                          *
 687                          * Note: if you think that sending the password back over the wire is insecure,
 688                          * check your assumptions.  If someone has successfully asserted an OpenID that
 689                          * is associated with the account, they already have password equivalency and can
 690                          * login, so they could just as easily change the password, etc.
 691                          */
 692                         if (login_via_openid(oiddata->claimed_id) == 0) {
 693                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 694                                 logged_in_response();
 695                         }
 696
 697                         /*
 698                          * New user whose OpenID is verified and Simple Registration Extension is in use?
 699                          */
 700                         else if (openid_create_user_via_sri(oiddata->claimed_id, keys) == 0) {
 701                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 702                                 logged_in_response();
 703                         }
 704
 705                         /* FIXME right here we have to handle manual account creation */
 706
 707                         else {
 708                                 cprintf("fail\n");
 709                         }
 710                 }
 711         }
 712         else {
 713                 cprintf("fail\n");
 714         }
 715         cprintf("000\n");
 716
 717         /*
 718          * We will eventually do something with the data in the hash list.
 719          *
 720         long len;
 721         void *Value;
 722         char *Key;
 723         HashPos *HashPos;
 724         HashPos = GetNewHashPos();
 725         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 726         {
 727         }
 728         DeleteHashPos(&HashPos);
 729          */
 730
 731         DeleteHash(&keys);              /* This will free() all the key data for us */
 732 }
 733
 734
 735
 736 /**************************************************************************/
 737 /*                                                                        */
 738 /* Functions in this section handle module initialization and shutdown    */
 739 /*                                                                        */
 740 /**************************************************************************/
 741
 742
 743 /*
 744  * This cleanup function blows away the temporary memory used by this module.
 745  */
 746 void openid_cleanup_function(void) {
 747
 748         if (CC->openid_data != NULL) {
 749                 free(CC->openid_data);
 750         }
 751 }
 752
 753
 754 CTDL_MODULE_INIT(openid_rp)
 755 {
 756         if (!threading)
 757         {
 758                 curl_global_init(CURL_GLOBAL_ALL);
 759                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 760                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 761                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 762                 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
 763                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP);
 764                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 765         }
 766
 767         /* return our Subversion id for the Log */
 768         return "$Id$";
 769 }
 770
 771
 772 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 773