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  * getuserbyopenid() works the same way as getuser() and getuserbynumber().
 222  * If a user account exists which is associated with the Claimed ID, it fills usbuf and returns zero.
 223  * Otherwise it returns nonzero.
 224  */
 225 int getuserbyopenid(struct ctdluser *usbuf, char *claimed_id)
 226 {
 227         struct cdbdata *cdboi;
 228         long usernum = 0;
 229
 230         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 231         if (cdboi == NULL) {
 232                 return(-1);
 233         }
 234
 235         memcpy(&usernum, cdboi->ptr, sizeof(long));
 236         cdb_free(cdboi);
 237
 238         return(getuserbynumber(usbuf, usernum));
 239 }
 240
 241
 242
 243 /**************************************************************************/
 244 /*                                                                        */
 245 /* Functions in this section handle OpenID protocol                       */
 246 /*                                                                        */
 247 /**************************************************************************/
 248
 249
 250 /*
 251  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 252  */
 253 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 254 {
 255         char *ptr = source_buf;
 256
 257         if (!target_buf) return;
 258         if (!rel) return;
 259         if (!source_buf) return;
 260
 261         target_buf[0] = 0;
 262
 263         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 264
 265                 char work_buffer[2048];
 266                 char *link_tag_start = NULL;
 267                 char *link_tag_end = NULL;
 268
 269                 char rel_tag[2048];
 270                 char href_tag[2048];
 271
 272                 link_tag_start = ptr;
 273                 link_tag_end = strchr(ptr, '>');
 274                 rel_tag[0] = 0;
 275                 href_tag[0] = 0;
 276
 277                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 278                         int len;
 279                         len = link_tag_end - link_tag_start;
 280                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 281                         memcpy(work_buffer, link_tag_start, len);
 282
 283                         char *rel_start = NULL;
 284                         char *rel_end = NULL;
 285                         rel_start = bmstrcasestr(work_buffer, "rel=");
 286                         if (rel_start) {
 287                                 rel_start = strchr(rel_start, '\"');
 288                                 if (rel_start) {
 289                                         ++rel_start;
 290                                         rel_end = strchr(rel_start, '\"');
 291                                         if ((rel_end) && (rel_end > rel_start)) {
 292                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 293                                         }
 294                                 }
 295                         }
 296
 297                         char *href_start = NULL;
 298                         char *href_end = NULL;
 299                         href_start = bmstrcasestr(work_buffer, "href=");
 300                         if (href_start) {
 301                                 href_start = strchr(href_start, '\"');
 302                                 if (href_start) {
 303                                         ++href_start;
 304                                         href_end = strchr(href_start, '\"');
 305                                         if ((href_end) && (href_end > href_start)) {
 306                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 307                                         }
 308                                 }
 309                         }
 310
 311                         if (!strcasecmp(rel, rel_tag)) {
 312                                 safestrncpy(target_buf, href_tag, target_size);
 313                                 return;
 314                         }
 315
 316                 }
 317
 318         ++ptr;
 319         }
 320
 321
 322 }
 323
 324
 325
 326 struct fh_data {
 327         char *buf;
 328         int total_bytes_received;
 329         int maxbytes;
 330 };
 331
 332
 333 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 334 {
 335         struct fh_data *fh = (struct fh_data *) stream;
 336         int got_bytes = (size * nmemb);
 337
 338         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 339                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 340         }
 341         if (got_bytes > 0) {
 342                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 343                 fh->total_bytes_received += got_bytes;
 344         }
 345
 346         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 347 }
 348
 349
 350
 351 /*
 352  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 353  *
 354  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 355  * requesting that the effective (normalized) URL be copied back to it.
 356  */
 357 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 358 {
 359         CURL *curl;
 360         CURLcode res;
 361         char errmsg[1024] = "";
 362         struct fh_data fh = {
 363                 target_buf,
 364                 0,
 365                 maxbytes
 366         };
 367         char *effective_url = NULL;
 368
 369         if (!url) return(-1);
 370         if (!target_buf) return(-1);
 371         memset(target_buf, 0, maxbytes);
 372
 373         curl = curl_easy_init();
 374         if (!curl) {
 375                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 376                 return(-1);
 377         }
 378
 379         curl_easy_setopt(curl, CURLOPT_URL, url);
 380         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 381         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 382         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 383         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 384         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 385         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 386         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 387         if (!IsEmptyStr(config.c_ip_addr)) {
 388                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 389         }
 390         res = curl_easy_perform(curl);
 391         if (res) {
 392                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 393         }
 394         if (normalize_len > 0) {
 395                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 396                 safestrncpy(url, effective_url, normalize_len);
 397         }
 398         curl_easy_cleanup(curl);
 399         return fh.total_bytes_received;
 400 }
 401
 402
 403 /*
 404  * Setup an OpenID authentication
 405  */
 406 void cmd_oids(char *argbuf) {
 407         char return_to[1024];
 408         char trust_root[1024];
 409         int i;
 410         char buf[SIZ];
 411         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 412         struct ctdl_openid *oiddata;
 413
 414         /* commented out because we may be attempting to attach an OpenID to
 415          * an existing account that is logged in
 416          *
 417         if (CCC->logged_in) {
 418                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 419                 return;
 420         }
 421          */
 422
 423         if (CCC->openid_data != NULL) {
 424                 free(CCC->openid_data);
 425         }
 426         oiddata = malloc(sizeof(struct ctdl_openid));
 427         if (oiddata == NULL) {
 428                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 429                 return;
 430         }
 431         memset(oiddata, 0, sizeof(struct ctdl_openid));
 432         CCC->openid_data = (void *) oiddata;
 433
 434         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 435         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 436         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 437         oiddata->validated = 0;
 438
 439         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 440         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 441         buf[sizeof buf - 1] = 0;
 442         if (i > 0) {
 443                 char openid_delegate[1024];
 444
 445                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 446                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 447
 448                 if (IsEmptyStr(oiddata->server)) {
 449                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 450                         return;
 451                 }
 452
 453                 /* Empty delegate is legal; we just use the openid_url instead */
 454                 if (IsEmptyStr(openid_delegate)) {
 455                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 456                 }
 457
 458                 /* Assemble a URL to which the user-agent will be redirected. */
 459                 char redirect_string[4096];
 460                 char escaped_identity[512];
 461                 char escaped_return_to[2048];
 462                 char escaped_trust_root[1024];
 463                 char escaped_sreg_optional[256];
 464
 465                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 466                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 467                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 468                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 469                         "nickname,email,fullname,postcode,country");
 470
 471                 snprintf(redirect_string, sizeof redirect_string,
 472                         "%s"
 473                         "?openid.mode=checkid_setup"
 474                         "&openid.identity=%s"
 475                         "&openid.return_to=%s"
 476                         "&openid.trust_root=%s"
 477                         "&openid.sreg.optional=%s"
 478                         ,
 479                         oiddata->server,
 480                         escaped_identity,
 481                         escaped_return_to,
 482                         escaped_trust_root,
 483                         escaped_sreg_optional
 484                 );
 485                 cprintf("%d %s\n", CIT_OK, redirect_string);
 486                 return;
 487         }
 488
 489         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 490 }
 491
 492
 493
 494
 495
 496 /*
 497  * Finalize an OpenID authentication
 498  */
 499 void cmd_oidf(char *argbuf) {
 500         char buf[2048];
 501         char thiskey[1024];
 502         char thisdata[1024];
 503         HashList *keys = NULL;
 504         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 505
 506         keys = NewHash(1, NULL);
 507         if (!keys) {
 508                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 509                 return;
 510         }
 511
 512         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 513
 514         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 515                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 516                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 517                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 518                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), generic_free_handler);
 519         }
 520
 521
 522         /* Now that we have all of the parameters, we have to validate the signature against the server */
 523         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 524
 525         CURL *curl;
 526         CURLcode res;
 527         struct curl_httppost *formpost = NULL;
 528         struct curl_httppost *lastptr = NULL;
 529         char errmsg[1024] = "";
 530         char *o_assoc_handle = NULL;
 531         char *o_sig = NULL;
 532         char *o_signed = NULL;
 533         int num_signed_values;
 534         int i;
 535         char k_keyname[128];
 536         char k_o_keyname[128];
 537         char *k_value = NULL;
 538         char valbuf[1024];
 539
 540         struct fh_data fh = {
 541                 valbuf,
 542                 0,
 543                 sizeof valbuf
 544         };
 545
 546         curl_formadd(&formpost, &lastptr,
 547                 CURLFORM_COPYNAME,      "openid.mode",
 548                 CURLFORM_COPYCONTENTS,  "check_authentication",
 549                 CURLFORM_END);
 550         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 551
 552         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 553                 curl_formadd(&formpost, &lastptr,
 554                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 555                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 556                         CURLFORM_END);
 557                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 558         }
 559
 560         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 561                 curl_formadd(&formpost, &lastptr,
 562                         CURLFORM_COPYNAME,      "openid.sig",
 563                         CURLFORM_COPYCONTENTS,  o_sig,
 564                         CURLFORM_END);
 565                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 566         }
 567
 568         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 569                 curl_formadd(&formpost, &lastptr,
 570                         CURLFORM_COPYNAME,      "openid.signed",
 571                         CURLFORM_COPYCONTENTS,  o_signed,
 572                         CURLFORM_END);
 573                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 574
 575                 num_signed_values = num_tokens(o_signed, ',');
 576                 for (i=0; i<num_signed_values; ++i) {
 577                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 578                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 579                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 580                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 581                                         curl_formadd(&formpost, &lastptr,
 582                                                 CURLFORM_COPYNAME,      k_o_keyname,
 583                                                 CURLFORM_COPYCONTENTS,  k_value,
 584                                                 CURLFORM_END);
 585                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 586                                 }
 587                                 else {
 588                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 589                                                 k_keyname);
 590                                 }
 591                         }
 592                 }
 593         }
 594
 595         curl = curl_easy_init();
 596         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 597         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 598         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 599         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 600         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 601         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 602         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 603         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 604         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 605         if (!IsEmptyStr(config.c_ip_addr)) {
 606                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 607         }
 608
 609         res = curl_easy_perform(curl);
 610         if (res) {
 611                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 612         }
 613         curl_easy_cleanup(curl);
 614         curl_formfree(formpost);
 615
 616         valbuf[fh.total_bytes_received] = 0;
 617
 618         if (bmstrcasestr(valbuf, "is_valid:true")) {
 619                 oiddata->validated = 1;
 620         }
 621
 622         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->validated ? "succeeded" : "failed") );
 623
 624         /* Respond to the client */
 625
 626         if (oiddata->validated) {
 627
 628                 /* If we were already logged in, attach the OpenID to the user's account */
 629                 if (CC->logged_in) {
 630                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 631                                 cprintf("attach\n");
 632                         }
 633                         else {
 634                                 cprintf("fail\n");
 635                         }
 636                 }
 637
 638                 /* Otherwise, a user is attempting to log in using the validated OpenID */
 639                 else {
 640                         struct ctdluser usbuf;
 641
 642                         /*
 643                          * Existing user who has claimed this OpenID?
 644                          *
 645                          * Note: if you think that sending the password back over the wire is insecure,
 646                          * check your assumptions.  If someone has successfully asserted an OpenID that
 647                          * is associated with the account, they already have password equivalency and can
 648                          * login, so they could just as easily change the password, etc.
 649                          */
 650                         if (getuserbyopenid(&usbuf, oiddata->claimed_id) == 0) {
 651                                 cprintf("authenticate\n%s\n%s\n", usbuf.fullname, usbuf.password);
 652                         }
 653
 654                         else {
 655                                 cprintf("fail\n");              // FIXME do the login here!!
 656                         }
 657                 }
 658         }
 659         else {
 660                 cprintf("fail\n");
 661         }
 662         cprintf("000\n");
 663
 664         /*
 665          * We will eventually do something with the data in the hash list.
 666          *
 667         long len;
 668         void *Value;
 669         char *Key;
 670         HashPos *HashPos;
 671         HashPos = GetNewHashPos();
 672         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 673         {
 674         }
 675         DeleteHashPos(&HashPos);
 676          */
 677
 678         DeleteHash(&keys);              /* This will free() all the key data for us */
 679 }
 680
 681
 682 // mode = [6]  id_res
 683 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 684 // assoc_handle = [26]  6ekac3ju181tgepk7v4h9r7ui7
 685 // return_to = [42]  http://jemcaterers.net/finish_openid_login
 686 // sreg.nickname = [17]  IGnatius T Foobar
 687 // sreg.email = [26]  ajc@uncensored.citadel.org
 688 // sreg.fullname = [10]  Art Cancro
 689 // sreg.postcode = [5]  10549
 690 // sreg.country = [2]  US
 691 // signed = [102]  mode,identity,assoc_handle,return_to,sreg.nickname,sreg.email,sreg.fullname,sreg.postcode,sreg.country
 692 // sig = [28]  vixxxU4MAqWfxxxxCfrHv3TxxxhEw=
 693
 694
 695
 696
 697 /**************************************************************************/
 698 /*                                                                        */
 699 /* Functions in this section handle module initialization and shutdown    */
 700 /*                                                                        */
 701 /**************************************************************************/
 702
 703
 704 /*
 705  * This cleanup function blows away the temporary memory used by this module.
 706  */
 707 void openid_cleanup_function(void) {
 708
 709         if (CC->openid_data != NULL) {
 710                 free(CC->openid_data);
 711         }
 712 }
 713
 714
 715 CTDL_MODULE_INIT(openid_rp)
 716 {
 717         if (!threading)
 718         {
 719                 curl_global_init(CURL_GLOBAL_ALL);
 720                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 721                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 722                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 723                 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
 724                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP);
 725                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 726         }
 727
 728         /* return our Subversion id for the Log */
 729         return "$Id$";
 730 }
 731
 732
 733 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 734