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         char new_password[32];
 227
 228         if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
 229         if (config.c_disable_newu) return(2);
 230         if (CC->logged_in) return(3);
 231         if (!GetHash(sri_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
 232
 233         CtdlLogPrintf(CTDL_DEBUG, "The desired account name is <%s>\n", desired_name);
 234
 235         if (!getuser(&CC->user, desired_name)) {
 236                 CtdlLogPrintf(CTDL_DEBUG, "<%s> is already taken by another user.\n", desired_name);
 237                 memset(&CC->user, 0, sizeof(struct ctdluser));
 238                 return(5);
 239         }
 240
 241         /* The desired account name is available.  Create the account and log it in! */
 242         if (create_user(desired_name, 1)) return(6);
 243
 244         snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
 245         CtdlSetPassword(new_password);
 246         attach_openid(&CC->user, claimed_id);
 247         return(0);
 248 }
 249
 250 // FIXME we still have to set up the vCard
 251
 252 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 253 // sreg.nickname = [17]  IGnatius T Foobar
 254 // sreg.email = [26]  ajc@uncensored.citadel.org
 255 // sreg.fullname = [10]  Art Cancro
 256 // sreg.postcode = [5]  10549
 257 // sreg.country = [2]  US
 258
 259
 260
 261 /*
 262  * If a user account exists which is associated with the Claimed ID, log it in and return zero.
 263  * Otherwise it returns nonzero.
 264  */
 265 int login_via_openid(char *claimed_id)
 266 {
 267         struct cdbdata *cdboi;
 268         long usernum = 0;
 269
 270         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 271         if (cdboi == NULL) {
 272                 return(-1);
 273         }
 274
 275         memcpy(&usernum, cdboi->ptr, sizeof(long));
 276         cdb_free(cdboi);
 277
 278         if (!getuserbynumber(&CC->user, usernum)) {
 279                 /* Now become the user we just created */
 280                 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
 281                 do_login();
 282                 return(0);
 283         }
 284         else {
 285                 memset(&CC->user, 0, sizeof(struct ctdluser));
 286                 return(-1);
 287         }
 288 }
 289
 290
 291
 292
 293 /**************************************************************************/
 294 /*                                                                        */
 295 /* Functions in this section handle OpenID protocol                       */
 296 /*                                                                        */
 297 /**************************************************************************/
 298
 299
 300 /*
 301  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 302  */
 303 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 304 {
 305         char *ptr = source_buf;
 306
 307         if (!target_buf) return;
 308         if (!rel) return;
 309         if (!source_buf) return;
 310
 311         target_buf[0] = 0;
 312
 313         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 314
 315                 char work_buffer[2048];
 316                 char *link_tag_start = NULL;
 317                 char *link_tag_end = NULL;
 318
 319                 char rel_tag[2048];
 320                 char href_tag[2048];
 321
 322                 link_tag_start = ptr;
 323                 link_tag_end = strchr(ptr, '>');
 324                 rel_tag[0] = 0;
 325                 href_tag[0] = 0;
 326
 327                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 328                         int len;
 329                         len = link_tag_end - link_tag_start;
 330                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 331                         memcpy(work_buffer, link_tag_start, len);
 332
 333                         char *rel_start = NULL;
 334                         char *rel_end = NULL;
 335                         rel_start = bmstrcasestr(work_buffer, "rel=");
 336                         if (rel_start) {
 337                                 rel_start = strchr(rel_start, '\"');
 338                                 if (rel_start) {
 339                                         ++rel_start;
 340                                         rel_end = strchr(rel_start, '\"');
 341                                         if ((rel_end) && (rel_end > rel_start)) {
 342                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 343                                         }
 344                                 }
 345                         }
 346
 347                         char *href_start = NULL;
 348                         char *href_end = NULL;
 349                         href_start = bmstrcasestr(work_buffer, "href=");
 350                         if (href_start) {
 351                                 href_start = strchr(href_start, '\"');
 352                                 if (href_start) {
 353                                         ++href_start;
 354                                         href_end = strchr(href_start, '\"');
 355                                         if ((href_end) && (href_end > href_start)) {
 356                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 357                                         }
 358                                 }
 359                         }
 360
 361                         if (!strcasecmp(rel, rel_tag)) {
 362                                 safestrncpy(target_buf, href_tag, target_size);
 363                                 return;
 364                         }
 365
 366                 }
 367
 368         ++ptr;
 369         }
 370
 371
 372 }
 373
 374
 375
 376 struct fh_data {
 377         char *buf;
 378         int total_bytes_received;
 379         int maxbytes;
 380 };
 381
 382
 383 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 384 {
 385         struct fh_data *fh = (struct fh_data *) stream;
 386         int got_bytes = (size * nmemb);
 387
 388         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 389                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 390         }
 391         if (got_bytes > 0) {
 392                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 393                 fh->total_bytes_received += got_bytes;
 394         }
 395
 396         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 397 }
 398
 399
 400
 401 /*
 402  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 403  *
 404  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 405  * requesting that the effective (normalized) URL be copied back to it.
 406  */
 407 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 408 {
 409         CURL *curl;
 410         CURLcode res;
 411         char errmsg[1024] = "";
 412         struct fh_data fh = {
 413                 target_buf,
 414                 0,
 415                 maxbytes
 416         };
 417         char *effective_url = NULL;
 418
 419         if (!url) return(-1);
 420         if (!target_buf) return(-1);
 421         memset(target_buf, 0, maxbytes);
 422
 423         curl = curl_easy_init();
 424         if (!curl) {
 425                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 426                 return(-1);
 427         }
 428
 429         curl_easy_setopt(curl, CURLOPT_URL, url);
 430         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 431         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 432         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 433         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 434         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 435         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 436         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 437         if (!IsEmptyStr(config.c_ip_addr)) {
 438                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 439         }
 440         res = curl_easy_perform(curl);
 441         if (res) {
 442                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 443         }
 444         if (normalize_len > 0) {
 445                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 446                 safestrncpy(url, effective_url, normalize_len);
 447         }
 448         curl_easy_cleanup(curl);
 449         return fh.total_bytes_received;
 450 }
 451
 452
 453 /*
 454  * Setup an OpenID authentication
 455  */
 456 void cmd_oids(char *argbuf) {
 457         char return_to[1024];
 458         char trust_root[1024];
 459         int i;
 460         char buf[SIZ];
 461         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 462         struct ctdl_openid *oiddata;
 463
 464         /* commented out because we may be attempting to attach an OpenID to
 465          * an existing account that is logged in
 466          *
 467         if (CCC->logged_in) {
 468                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 469                 return;
 470         }
 471          */
 472
 473         if (CCC->openid_data != NULL) {
 474                 free(CCC->openid_data);
 475         }
 476         oiddata = malloc(sizeof(struct ctdl_openid));
 477         if (oiddata == NULL) {
 478                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 479                 return;
 480         }
 481         memset(oiddata, 0, sizeof(struct ctdl_openid));
 482         CCC->openid_data = (void *) oiddata;
 483
 484         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 485         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 486         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 487         oiddata->validated = 0;
 488
 489         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 490         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 491         buf[sizeof buf - 1] = 0;
 492         if (i > 0) {
 493                 char openid_delegate[1024];
 494
 495                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 496                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 497
 498                 if (IsEmptyStr(oiddata->server)) {
 499                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 500                         return;
 501                 }
 502
 503                 /* Empty delegate is legal; we just use the openid_url instead */
 504                 if (IsEmptyStr(openid_delegate)) {
 505                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 506                 }
 507
 508                 /* Assemble a URL to which the user-agent will be redirected. */
 509                 char redirect_string[4096];
 510                 char escaped_identity[512];
 511                 char escaped_return_to[2048];
 512                 char escaped_trust_root[1024];
 513                 char escaped_sreg_optional[256];
 514
 515                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 516                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 517                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 518                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 519                         "nickname,email,fullname,postcode,country");
 520
 521                 snprintf(redirect_string, sizeof redirect_string,
 522                         "%s"
 523                         "?openid.mode=checkid_setup"
 524                         "&openid.identity=%s"
 525                         "&openid.return_to=%s"
 526                         "&openid.trust_root=%s"
 527                         "&openid.sreg.optional=%s"
 528                         ,
 529                         oiddata->server,
 530                         escaped_identity,
 531                         escaped_return_to,
 532                         escaped_trust_root,
 533                         escaped_sreg_optional
 534                 );
 535                 cprintf("%d %s\n", CIT_OK, redirect_string);
 536                 return;
 537         }
 538
 539         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 540 }
 541
 542
 543
 544
 545
 546 /*
 547  * Finalize an OpenID authentication
 548  */
 549 void cmd_oidf(char *argbuf) {
 550         char buf[2048];
 551         char thiskey[1024];
 552         char thisdata[1024];
 553         HashList *keys = NULL;
 554         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 555
 556         keys = NewHash(1, NULL);
 557         if (!keys) {
 558                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 559                 return;
 560         }
 561
 562         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 563
 564         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 565                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 566                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 567                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 568                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), generic_free_handler);
 569         }
 570
 571
 572         /* Now that we have all of the parameters, we have to validate the signature against the server */
 573         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 574
 575         CURL *curl;
 576         CURLcode res;
 577         struct curl_httppost *formpost = NULL;
 578         struct curl_httppost *lastptr = NULL;
 579         char errmsg[1024] = "";
 580         char *o_assoc_handle = NULL;
 581         char *o_sig = NULL;
 582         char *o_signed = NULL;
 583         int num_signed_values;
 584         int i;
 585         char k_keyname[128];
 586         char k_o_keyname[128];
 587         char *k_value = NULL;
 588         char valbuf[1024];
 589
 590         struct fh_data fh = {
 591                 valbuf,
 592                 0,
 593                 sizeof valbuf
 594         };
 595
 596         curl_formadd(&formpost, &lastptr,
 597                 CURLFORM_COPYNAME,      "openid.mode",
 598                 CURLFORM_COPYCONTENTS,  "check_authentication",
 599                 CURLFORM_END);
 600         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 601
 602         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 603                 curl_formadd(&formpost, &lastptr,
 604                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 605                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 606                         CURLFORM_END);
 607                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 608         }
 609
 610         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 611                 curl_formadd(&formpost, &lastptr,
 612                         CURLFORM_COPYNAME,      "openid.sig",
 613                         CURLFORM_COPYCONTENTS,  o_sig,
 614                         CURLFORM_END);
 615                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 616         }
 617
 618         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 619                 curl_formadd(&formpost, &lastptr,
 620                         CURLFORM_COPYNAME,      "openid.signed",
 621                         CURLFORM_COPYCONTENTS,  o_signed,
 622                         CURLFORM_END);
 623                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 624
 625                 num_signed_values = num_tokens(o_signed, ',');
 626                 for (i=0; i<num_signed_values; ++i) {
 627                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 628                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 629                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 630                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 631                                         curl_formadd(&formpost, &lastptr,
 632                                                 CURLFORM_COPYNAME,      k_o_keyname,
 633                                                 CURLFORM_COPYCONTENTS,  k_value,
 634                                                 CURLFORM_END);
 635                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 636                                 }
 637                                 else {
 638                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 639                                                 k_keyname);
 640                                 }
 641                         }
 642                 }
 643         }
 644
 645         curl = curl_easy_init();
 646         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 647         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 648         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 649         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 650         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 651         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 652         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 653         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 654         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 655         if (!IsEmptyStr(config.c_ip_addr)) {
 656                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 657         }
 658
 659         res = curl_easy_perform(curl);
 660         if (res) {
 661                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 662         }
 663         curl_easy_cleanup(curl);
 664         curl_formfree(formpost);
 665
 666         valbuf[fh.total_bytes_received] = 0;
 667
 668         if (bmstrcasestr(valbuf, "is_valid:true")) {
 669                 oiddata->validated = 1;
 670         }
 671
 672         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->validated ? "succeeded" : "failed") );
 673
 674         /* Respond to the client */
 675
 676         if (oiddata->validated) {
 677
 678                 /* If we were already logged in, attach the OpenID to the user's account */
 679                 if (CC->logged_in) {
 680                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 681                                 cprintf("attach\n");
 682                         }
 683                         else {
 684                                 cprintf("fail\n");
 685                         }
 686                 }
 687
 688                 /* Otherwise, a user is attempting to log in using the validated OpenID */
 689                 else {
 690                         /*
 691                          * Existing user who has claimed this OpenID?
 692                          *
 693                          * Note: if you think that sending the password back over the wire is insecure,
 694                          * check your assumptions.  If someone has successfully asserted an OpenID that
 695                          * is associated with the account, they already have password equivalency and can
 696                          * login, so they could just as easily change the password, etc.
 697                          */
 698                         if (login_via_openid(oiddata->claimed_id) == 0) {
 699                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 700                                 logged_in_response();
 701                         }
 702
 703                         /*
 704                          * New user whose OpenID is verified and Simple Registration Extension is in use?
 705                          */
 706                         else if (openid_create_user_via_sri(oiddata->claimed_id, keys) == 0) {
 707                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 708                                 logged_in_response();
 709                         }
 710
 711                         /* FIXME right here we have to handle manual account creation */
 712
 713                         else {
 714                                 cprintf("fail\n");
 715                         }
 716                 }
 717         }
 718         else {
 719                 cprintf("fail\n");
 720         }
 721         cprintf("000\n");
 722
 723         /*
 724          * We will eventually do something with the data in the hash list.
 725          *
 726         long len;
 727         void *Value;
 728         char *Key;
 729         HashPos *HashPos;
 730         HashPos = GetNewHashPos();
 731         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 732         {
 733         }
 734         DeleteHashPos(&HashPos);
 735          */
 736
 737         DeleteHash(&keys);              /* This will free() all the key data for us */
 738 }
 739
 740
 741
 742 /**************************************************************************/
 743 /*                                                                        */
 744 /* Functions in this section handle module initialization and shutdown    */
 745 /*                                                                        */
 746 /**************************************************************************/
 747
 748
 749 /*
 750  * This cleanup function blows away the temporary memory used by this module.
 751  */
 752 void openid_cleanup_function(void) {
 753
 754         if (CC->openid_data != NULL) {
 755                 free(CC->openid_data);
 756         }
 757 }
 758
 759
 760 CTDL_MODULE_INIT(openid_rp)
 761 {
 762         if (!threading)
 763         {
 764                 curl_global_init(CURL_GLOBAL_ALL);
 765                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 766                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 767                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 768                 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
 769                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_STOP);
 770                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 771         }
 772
 773         /* return our Subversion id for the Log */
 774         return "$Id$";
 775 }
 776
 777
 778 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 779