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 verified;
  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 attached to %s (%ld)\n",
 114                 claimed_id, who->fullname, who->usernum);
 115         return(0);
 116 }
 117
 118
 119
 120 /*
 121  * When a user is being deleted, we have to delete any OpenID associations
 122  */
 123 void openid_purge(struct ctdluser *usbuf) {
 124         struct cdbdata *cdboi;
 125         HashList *keys = NULL;
 126         HashPos *HashPos;
 127         char *deleteme = NULL;
 128         long len;
 129         void *Value;
 130         char *Key;
 131
 132         keys = NewHash(1, NULL);
 133         if (!keys) return;
 134
 135
 136         cdb_rewind(CDB_OPENID);
 137         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 138                 if (cdboi->len > sizeof(long)) {
 139                         if (((long)*(cdboi->ptr)) == usbuf->usernum) {
 140                                 deleteme = strdup(cdboi->ptr + sizeof(long)),
 141                                 Put(keys, deleteme, strlen(deleteme), deleteme, generic_free_handler);
 142                         }
 143                 }
 144                 cdb_free(cdboi);
 145         }
 146
 147         /* Go through the hash list, deleting keys we stored in it */
 148
 149         HashPos = GetNewHashPos();
 150         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 151         {
 152                 CtdlLogPrintf(CTDL_DEBUG, "Deleting associated OpenID <%s>\n", Value);
 153                 cdb_delete(CDB_OPENID, Value, strlen(Value));
 154                 /* note: don't free(Value) -- deleting the hash list will handle this for us */
 155         }
 156         DeleteHashPos(&HashPos);
 157         DeleteHash(&keys);
 158 }
 159
 160
 161
 162 /*
 163  * List the OpenIDs associated with the currently logged in account
 164  */
 165 void cmd_oidl(char *argbuf) {
 166         struct cdbdata *cdboi;
 167
 168         if (CtdlAccessCheck(ac_logged_in)) return;
 169         cdb_rewind(CDB_OPENID);
 170         cprintf("%d Associated OpenIDs:\n", LISTING_FOLLOWS);
 171
 172         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 173                 if (cdboi->len > sizeof(long)) {
 174                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 175                                 cprintf("%s\n", cdboi->ptr + sizeof(long));
 176                         }
 177                 }
 178                 cdb_free(cdboi);
 179         }
 180         cprintf("000\n");
 181 }
 182
 183
 184
 185 /*
 186  * Detach an OpenID from the currently logged in account
 187  */
 188 void cmd_oidd(char *argbuf) {
 189         struct cdbdata *cdboi;
 190         char id_to_detach[1024];
 191         int this_is_mine = 0;
 192
 193         if (CtdlAccessCheck(ac_logged_in)) return;
 194         extract_token(id_to_detach, argbuf, 0, '|', sizeof id_to_detach);
 195         if (IsEmptyStr(id_to_detach)) {
 196                 cprintf("%d An empty OpenID URL is not allowed.\n", ERROR + ILLEGAL_VALUE);
 197         }
 198
 199         cdb_rewind(CDB_OPENID);
 200         while (cdboi = cdb_next_item(CDB_OPENID), cdboi != NULL) {
 201                 if (cdboi->len > sizeof(long)) {
 202                         if (((long)*(cdboi->ptr)) == CC->user.usernum) {
 203                                 this_is_mine = 1;
 204                         }
 205                 }
 206                 cdb_free(cdboi);
 207         }
 208
 209         if (!this_is_mine) {
 210                 cprintf("%d That OpenID was not found or not associated with your account.\n",
 211                         ERROR + ILLEGAL_VALUE);
 212                 return;
 213         }
 214
 215         cdb_delete(CDB_OPENID, id_to_detach, strlen(id_to_detach));
 216         cprintf("%d %s detached from your account.\n", CIT_OK, id_to_detach);
 217 }
 218
 219
 220
 221 /*
 222  * Attempt to auto-create a new Citadel account using the nickname from Simple Registration Extension
 223  */
 224 int openid_create_user_via_sri(char *claimed_id, HashList *sri_keys)
 225 {
 226         char *desired_name = NULL;
 227         char new_password[32];
 228
 229         if (config.c_auth_mode != AUTHMODE_NATIVE) return(1);
 230         if (config.c_disable_newu) return(2);
 231         if (CC->logged_in) return(3);
 232         if (!GetHash(sri_keys, "sreg.nickname", 13, (void *) &desired_name)) return(4);
 233
 234         CtdlLogPrintf(CTDL_DEBUG, "The desired account name is <%s>\n", desired_name);
 235
 236         if (!getuser(&CC->user, desired_name)) {
 237                 CtdlLogPrintf(CTDL_DEBUG, "<%s> is already taken by another user.\n", desired_name);
 238                 memset(&CC->user, 0, sizeof(struct ctdluser));
 239                 return(5);
 240         }
 241
 242         /* The desired account name is available.  Create the account and log it in! */
 243         if (create_user(desired_name, 1)) return(6);
 244
 245         snprintf(new_password, sizeof new_password, "%08lx%08lx", random(), random());
 246         CtdlSetPassword(new_password);
 247         attach_openid(&CC->user, claimed_id);
 248         return(0);
 249 }
 250
 251 // FIXME we still have to set up the vCard
 252
 253 // identity = [50]  http://uncensored.citadel.org/~ajc/MyID.config.php
 254 // sreg.nickname = [17]  IGnatius T Foobar
 255 // sreg.email = [26]  ajc@uncensored.citadel.org
 256 // sreg.fullname = [10]  Art Cancro
 257 // sreg.postcode = [5]  10549
 258 // sreg.country = [2]  US
 259
 260
 261
 262 /*
 263  * If a user account exists which is associated with the Claimed ID, log it in and return zero.
 264  * Otherwise it returns nonzero.
 265  */
 266 int login_via_openid(char *claimed_id)
 267 {
 268         struct cdbdata *cdboi;
 269         long usernum = 0;
 270
 271         cdboi = cdb_fetch(CDB_OPENID, claimed_id, strlen(claimed_id));
 272         if (cdboi == NULL) {
 273                 return(-1);
 274         }
 275
 276         memcpy(&usernum, cdboi->ptr, sizeof(long));
 277         cdb_free(cdboi);
 278
 279         if (!getuserbynumber(&CC->user, usernum)) {
 280                 /* Now become the user we just created */
 281                 safestrncpy(CC->curr_user, CC->user.fullname, sizeof CC->curr_user);
 282                 do_login();
 283                 return(0);
 284         }
 285         else {
 286                 memset(&CC->user, 0, sizeof(struct ctdluser));
 287                 return(-1);
 288         }
 289 }
 290
 291
 292
 293
 294 /**************************************************************************/
 295 /*                                                                        */
 296 /* Functions in this section handle OpenID protocol                       */
 297 /*                                                                        */
 298 /**************************************************************************/
 299
 300
 301 /*
 302  * Locate a <link> tag and, given its 'rel=' parameter, return its 'href' parameter
 303  */
 304 void extract_link(char *target_buf, int target_size, char *rel, char *source_buf)
 305 {
 306         char *ptr = source_buf;
 307
 308         if (!target_buf) return;
 309         if (!rel) return;
 310         if (!source_buf) return;
 311
 312         target_buf[0] = 0;
 313
 314         while (ptr = bmstrcasestr(ptr, "<link"), ptr != NULL) {
 315
 316                 char work_buffer[2048];
 317                 char *link_tag_start = NULL;
 318                 char *link_tag_end = NULL;
 319
 320                 char rel_tag[2048];
 321                 char href_tag[2048];
 322
 323                 link_tag_start = ptr;
 324                 link_tag_end = strchr(ptr, '>');
 325                 rel_tag[0] = 0;
 326                 href_tag[0] = 0;
 327
 328                 if ((link_tag_end) && (link_tag_end > link_tag_start)) {
 329                         int len;
 330                         len = link_tag_end - link_tag_start;
 331                         if (len > sizeof work_buffer) len = sizeof work_buffer;
 332                         memcpy(work_buffer, link_tag_start, len);
 333
 334                         char *rel_start = NULL;
 335                         char *rel_end = NULL;
 336                         rel_start = bmstrcasestr(work_buffer, "rel=");
 337                         if (rel_start) {
 338                                 rel_start = strchr(rel_start, '\"');
 339                                 if (rel_start) {
 340                                         ++rel_start;
 341                                         rel_end = strchr(rel_start, '\"');
 342                                         if ((rel_end) && (rel_end > rel_start)) {
 343                                                 safestrncpy(rel_tag, rel_start, rel_end - rel_start + 1);
 344                                         }
 345                                 }
 346                         }
 347
 348                         char *href_start = NULL;
 349                         char *href_end = NULL;
 350                         href_start = bmstrcasestr(work_buffer, "href=");
 351                         if (href_start) {
 352                                 href_start = strchr(href_start, '\"');
 353                                 if (href_start) {
 354                                         ++href_start;
 355                                         href_end = strchr(href_start, '\"');
 356                                         if ((href_end) && (href_end > href_start)) {
 357                                                 safestrncpy(href_tag, href_start, href_end - href_start + 1);
 358                                         }
 359                                 }
 360                         }
 361
 362                         if (!strcasecmp(rel, rel_tag)) {
 363                                 safestrncpy(target_buf, href_tag, target_size);
 364                                 return;
 365                         }
 366
 367                 }
 368
 369         ++ptr;
 370         }
 371
 372
 373 }
 374
 375
 376
 377 struct fh_data {
 378         char *buf;
 379         int total_bytes_received;
 380         int maxbytes;
 381 };
 382
 383
 384 size_t fh_callback(void *ptr, size_t size, size_t nmemb, void *stream)
 385 {
 386         struct fh_data *fh = (struct fh_data *) stream;
 387         int got_bytes = (size * nmemb);
 388
 389         if (fh->total_bytes_received + got_bytes > fh->maxbytes) {
 390                 got_bytes = fh->maxbytes - fh->total_bytes_received;
 391         }
 392         if (got_bytes > 0) {
 393                 memcpy(&fh->buf[fh->total_bytes_received], ptr, got_bytes);
 394                 fh->total_bytes_received += got_bytes;
 395         }
 396
 397         return (size * nmemb);  /* always succeed; libcurl doesn't need to know if we truncated it */
 398 }
 399
 400
 401
 402 /*
 403  * Begin an HTTP fetch (returns number of bytes actually fetched, or -1 for error) using libcurl.
 404  *
 405  * If 'normalize_len' is nonzero, the caller is specifying the buffer size of 'url', and is
 406  * requesting that the effective (normalized) URL be copied back to it.
 407  */
 408 int fetch_http(char *url, char *target_buf, int maxbytes, int normalize_len)
 409 {
 410         CURL *curl;
 411         CURLcode res;
 412         char errmsg[1024] = "";
 413         struct fh_data fh = {
 414                 target_buf,
 415                 0,
 416                 maxbytes
 417         };
 418         char *effective_url = NULL;
 419
 420         if (!url) return(-1);
 421         if (!target_buf) return(-1);
 422         memset(target_buf, 0, maxbytes);
 423
 424         curl = curl_easy_init();
 425         if (!curl) {
 426                 CtdlLogPrintf(CTDL_ALERT, "Unable to initialize libcurl.\n");
 427                 return(-1);
 428         }
 429
 430         curl_easy_setopt(curl, CURLOPT_URL, url);
 431         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 432         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 433         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 434         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 435         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 436         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 437         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 438         if (!IsEmptyStr(config.c_ip_addr)) {
 439                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 440         }
 441         res = curl_easy_perform(curl);
 442         if (res) {
 443                 CtdlLogPrintf(CTDL_DEBUG, "fetch_http() libcurl error %d: %s\n", res, errmsg);
 444         }
 445         if (normalize_len > 0) {
 446                 curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
 447                 safestrncpy(url, effective_url, normalize_len);
 448         }
 449         curl_easy_cleanup(curl);
 450         return fh.total_bytes_received;
 451 }
 452
 453
 454 /*
 455  * Setup an OpenID authentication
 456  */
 457 void cmd_oids(char *argbuf) {
 458         char return_to[1024];
 459         char trust_root[1024];
 460         int i;
 461         char buf[SIZ];
 462         struct CitContext *CCC = CC;    /* CachedCitContext - performance boost */
 463         struct ctdl_openid *oiddata;
 464
 465         /* commented out because we may be attempting to attach an OpenID to
 466          * an existing account that is logged in
 467          *
 468         if (CCC->logged_in) {
 469                 cprintf("%d Already logged in.\n", ERROR + ALREADY_LOGGED_IN);
 470                 return;
 471         }
 472          */
 473
 474         if (CCC->openid_data != NULL) {
 475                 free(CCC->openid_data);
 476         }
 477         oiddata = malloc(sizeof(struct ctdl_openid));
 478         if (oiddata == NULL) {
 479                 cprintf("%d malloc failed\n", ERROR + INTERNAL_ERROR);
 480                 return;
 481         }
 482         memset(oiddata, 0, sizeof(struct ctdl_openid));
 483         CCC->openid_data = (void *) oiddata;
 484
 485         extract_token(oiddata->claimed_id, argbuf, 0, '|', sizeof oiddata->claimed_id);
 486         extract_token(return_to, argbuf, 1, '|', sizeof return_to);
 487         extract_token(trust_root, argbuf, 2, '|', sizeof trust_root);
 488         oiddata->verified = 0;
 489
 490         i = fetch_http(oiddata->claimed_id, buf, sizeof buf - 1, sizeof oiddata->claimed_id);
 491         CtdlLogPrintf(CTDL_DEBUG, "Normalized URL and Claimed ID is: %s\n", oiddata->claimed_id);
 492         buf[sizeof buf - 1] = 0;
 493         if (i > 0) {
 494                 char openid_delegate[1024];
 495
 496                 extract_link(oiddata->server, sizeof oiddata->server, "openid.server", buf);
 497                 extract_link(openid_delegate, sizeof openid_delegate, "openid.delegate", buf);
 498
 499                 if (IsEmptyStr(oiddata->server)) {
 500                         cprintf("%d There is no OpenID identity provider at this URL.\n", ERROR);
 501                         return;
 502                 }
 503
 504                 /* Empty delegate is legal; we just use the openid_url instead */
 505                 if (IsEmptyStr(openid_delegate)) {
 506                         safestrncpy(openid_delegate, oiddata->claimed_id, sizeof openid_delegate);
 507                 }
 508
 509                 /* Assemble a URL to which the user-agent will be redirected. */
 510                 char redirect_string[4096];
 511                 char escaped_identity[512];
 512                 char escaped_return_to[2048];
 513                 char escaped_trust_root[1024];
 514                 char escaped_sreg_optional[256];
 515
 516                 urlesc(escaped_identity, sizeof escaped_identity, openid_delegate);
 517                 urlesc(escaped_return_to, sizeof escaped_return_to, return_to);
 518                 urlesc(escaped_trust_root, sizeof escaped_trust_root, trust_root);
 519                 urlesc(escaped_sreg_optional, sizeof escaped_sreg_optional,
 520                         "nickname,email,fullname,postcode,country");
 521
 522                 snprintf(redirect_string, sizeof redirect_string,
 523                         "%s"
 524                         "?openid.mode=checkid_setup"
 525                         "&openid.identity=%s"
 526                         "&openid.return_to=%s"
 527                         "&openid.trust_root=%s"
 528                         "&openid.sreg.optional=%s"
 529                         ,
 530                         oiddata->server,
 531                         escaped_identity,
 532                         escaped_return_to,
 533                         escaped_trust_root,
 534                         escaped_sreg_optional
 535                 );
 536                 cprintf("%d %s\n", CIT_OK, redirect_string);
 537                 return;
 538         }
 539
 540         cprintf("%d Unable to fetch OpenID URL\n", ERROR);
 541 }
 542
 543
 544
 545
 546
 547 /*
 548  * Finalize an OpenID authentication
 549  */
 550 void cmd_oidf(char *argbuf) {
 551         char buf[2048];
 552         char thiskey[1024];
 553         char thisdata[1024];
 554         HashList *keys = NULL;
 555         struct ctdl_openid *oiddata = (struct ctdl_openid *) CC->openid_data;
 556
 557         keys = NewHash(1, NULL);
 558         if (!keys) {
 559                 cprintf("%d NewHash() failed\n", ERROR + INTERNAL_ERROR);
 560                 return;
 561         }
 562
 563         cprintf("%d Transmit OpenID data now\n", START_CHAT_MODE);
 564
 565         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 566                 extract_token(thiskey, buf, 0, '|', sizeof thiskey);
 567                 extract_token(thisdata, buf, 1, '|', sizeof thisdata);
 568                 CtdlLogPrintf(CTDL_DEBUG, "%s: [%d] %s\n", thiskey, strlen(thisdata), thisdata);
 569                 Put(keys, thiskey, strlen(thiskey), strdup(thisdata), generic_free_handler);
 570         }
 571
 572
 573         /* Now that we have all of the parameters, we have to validate the signature against the server */
 574         CtdlLogPrintf(CTDL_DEBUG, "About to validate the signature...\n");
 575
 576         CURL *curl;
 577         CURLcode res;
 578         struct curl_httppost *formpost = NULL;
 579         struct curl_httppost *lastptr = NULL;
 580         char errmsg[1024] = "";
 581         char *o_assoc_handle = NULL;
 582         char *o_sig = NULL;
 583         char *o_signed = NULL;
 584         int num_signed_values;
 585         int i;
 586         char k_keyname[128];
 587         char k_o_keyname[128];
 588         char *k_value = NULL;
 589         char valbuf[1024];
 590
 591         struct fh_data fh = {
 592                 valbuf,
 593                 0,
 594                 sizeof valbuf
 595         };
 596
 597         curl_formadd(&formpost, &lastptr,
 598                 CURLFORM_COPYNAME,      "openid.mode",
 599                 CURLFORM_COPYCONTENTS,  "check_authentication",
 600                 CURLFORM_END);
 601         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.mode", "check_authentication");
 602
 603         if (GetHash(keys, "assoc_handle", 12, (void *) &o_assoc_handle)) {
 604                 curl_formadd(&formpost, &lastptr,
 605                         CURLFORM_COPYNAME,      "openid.assoc_handle",
 606                         CURLFORM_COPYCONTENTS,  o_assoc_handle,
 607                         CURLFORM_END);
 608                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.assoc_handle", o_assoc_handle);
 609         }
 610
 611         if (GetHash(keys, "sig", 3, (void *) &o_sig)) {
 612                 curl_formadd(&formpost, &lastptr,
 613                         CURLFORM_COPYNAME,      "openid.sig",
 614                         CURLFORM_COPYCONTENTS,  o_sig,
 615                         CURLFORM_END);
 616                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.sig", o_sig);
 617         }
 618
 619         if (GetHash(keys, "signed", 6, (void *) &o_signed)) {
 620                 curl_formadd(&formpost, &lastptr,
 621                         CURLFORM_COPYNAME,      "openid.signed",
 622                         CURLFORM_COPYCONTENTS,  o_signed,
 623                         CURLFORM_END);
 624                 CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", "openid.signed", o_signed);
 625
 626                 num_signed_values = num_tokens(o_signed, ',');
 627                 for (i=0; i<num_signed_values; ++i) {
 628                         extract_token(k_keyname, o_signed, i, ',', sizeof k_keyname);
 629                         if (strcasecmp(k_keyname, "mode")) {    // work around phpMyID bug
 630                                 if (GetHash(keys, k_keyname, strlen(k_keyname), (void *) &k_value)) {
 631                                         snprintf(k_o_keyname, sizeof k_o_keyname, "openid.%s", k_keyname);
 632                                         curl_formadd(&formpost, &lastptr,
 633                                                 CURLFORM_COPYNAME,      k_o_keyname,
 634                                                 CURLFORM_COPYCONTENTS,  k_value,
 635                                                 CURLFORM_END);
 636                                         CtdlLogPrintf(CTDL_DEBUG, "%25s : %s\n", k_o_keyname, k_value);
 637                                 }
 638                                 else {
 639                                         CtdlLogPrintf(CTDL_INFO, "OpenID: signed field '%s' is missing\n",
 640                                                 k_keyname);
 641                                 }
 642                         }
 643                 }
 644         }
 645
 646         curl = curl_easy_init();
 647         curl_easy_setopt(curl, CURLOPT_URL, oiddata->server);
 648         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 649         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
 650         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &fh);
 651         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fh_callback);
 652         curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
 653         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errmsg);
 654         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
 655         curl_easy_setopt(curl, CURLOPT_USERAGENT, CITADEL);
 656         if (!IsEmptyStr(config.c_ip_addr)) {
 657                 curl_easy_setopt(curl, CURLOPT_INTERFACE, config.c_ip_addr);
 658         }
 659
 660         res = curl_easy_perform(curl);
 661         if (res) {
 662                 CtdlLogPrintf(CTDL_DEBUG, "cmd_oidf() libcurl error %d: %s\n", res, errmsg);
 663         }
 664         curl_easy_cleanup(curl);
 665         curl_formfree(formpost);
 666
 667         valbuf[fh.total_bytes_received] = 0;
 668
 669         if (bmstrcasestr(valbuf, "is_valid:true")) {
 670                 oiddata->verified = 1;
 671         }
 672
 673         CtdlLogPrintf(CTDL_DEBUG, "Authentication %s.\n", (oiddata->verified ? "succeeded" : "failed") );
 674
 675         /* Respond to the client */
 676
 677         if (oiddata->verified) {
 678
 679                 /* If we were already logged in, attach the OpenID to the user's account */
 680                 if (CC->logged_in) {
 681                         if (attach_openid(&CC->user, oiddata->claimed_id) == 0) {
 682                                 cprintf("attach\n");
 683                         }
 684                         else {
 685                                 cprintf("fail\n");
 686                         }
 687                 }
 688
 689                 /* Otherwise, a user is attempting to log in using the verified OpenID */
 690                 else {
 691                         /*
 692                          * Existing user who has claimed this OpenID?
 693                          *
 694                          * Note: if you think that sending the password back over the wire is insecure,
 695                          * check your assumptions.  If someone has successfully asserted an OpenID that
 696                          * is associated with the account, they already have password equivalency and can
 697                          * login, so they could just as easily change the password, etc.
 698                          */
 699                         if (login_via_openid(oiddata->claimed_id) == 0) {
 700                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 701                                 logged_in_response();
 702                         }
 703
 704                         /*
 705                          * New user whose OpenID is verified and Simple Registration Extension is in use?
 706                          */
 707                         else if (openid_create_user_via_sri(oiddata->claimed_id, keys) == 0) {
 708                                 cprintf("authenticate\n%s\n%s\n", CC->user.fullname, CC->user.password);
 709                                 logged_in_response();
 710                         }
 711
 712                         /*
 713                          * OpenID is verified, but the desired username either was not specified or
 714                          * conflicts with an existing user.  Manual account creation is required.
 715                          */
 716                         else {
 717                                 char *desired_name = NULL;
 718                                 cprintf("verify_only\n");
 719                                 cprintf("%s\n", oiddata->claimed_id);
 720                                 if (GetHash(keys, "sreg.nickname", 13, (void *) &desired_name)) {
 721                                         cprintf("%s\n", desired_name);
 722                                 }
 723                                 else {
 724                                         cprintf("\n");
 725                                 }
 726                         }
 727                 }
 728         }
 729         else {
 730                 cprintf("fail\n");
 731         }
 732         cprintf("000\n");
 733
 734         /*
 735          * We will eventually do something with the data in the hash list.
 736          *
 737         long len;
 738         void *Value;
 739         char *Key;
 740         HashPos *HashPos;
 741         HashPos = GetNewHashPos();
 742         while (GetNextHashPos(keys, HashPos, &len, &Key, &Value)!=0)
 743         {
 744         }
 745         DeleteHashPos(&HashPos);
 746          */
 747
 748         DeleteHash(&keys);              /* This will free() all the key data for us */
 749 }
 750
 751
 752
 753 /**************************************************************************/
 754 /*                                                                        */
 755 /* Functions in this section handle module initialization and shutdown    */
 756 /*                                                                        */
 757 /**************************************************************************/
 758
 759
 760 /*
 761  * This cleanup function blows away the temporary memory used by this module.
 762  */
 763 void openid_cleanup_function(void) {
 764
 765         if (CC->openid_data != NULL) {
 766                 CtdlLogPrintf(CTDL_DEBUG, "Clearing OpenID session state\n");
 767                 free(CC->openid_data);
 768         }
 769 }
 770
 771
 772 CTDL_MODULE_INIT(openid_rp)
 773 {
 774         if (!threading)
 775         {
 776                 curl_global_init(CURL_GLOBAL_ALL);
 777                 CtdlRegisterProtoHook(cmd_oids, "OIDS", "Setup OpenID authentication");
 778                 CtdlRegisterProtoHook(cmd_oidf, "OIDF", "Finalize OpenID authentication");
 779                 CtdlRegisterProtoHook(cmd_oidl, "OIDL", "List OpenIDs associated with an account");
 780                 CtdlRegisterProtoHook(cmd_oidd, "OIDD", "Detach an OpenID from an account");
 781                 CtdlRegisterSessionHook(openid_cleanup_function, EVT_LOGOUT);
 782                 CtdlRegisterUserHook(openid_purge, EVT_PURGEUSER);
 783         }
 784
 785         /* return our Subversion id for the Log */
 786         return "$Id$";
 787 }
 788
 789
 790 /* FIXME ... we have to add the new openid database to serv_vandelay.c */
 791