citadel/ldap.c

   1 /*
   2  * These functions implement the portions of AUTHMODE_LDAP and AUTHMODE_LDAP_AD which
   3  * actually speak to the LDAP server.
   4  *
   5  * Copyright (c) 2011-2017 by the citadel.org development team.
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License, version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 int ctdl_require_ldap_version = 3;
  17
  18 #define _GNU_SOURCE             // Needed to suppress warning about vasprintf() when running on Linux/Linux
  19 #include <stdio.h>
  20 #include <libcitadel.h>
  21 #include "citserver.h"
  22 #include "citadel_ldap.h"
  23 #include "ctdl_module.h"
  24 #include "user_ops.h"
  25 #include "internet_addressing.h"
  26 #include "config.h"
  27
  28 #ifdef HAVE_LDAP
  29 #define LDAP_DEPRECATED 1       // Suppress libldap's warning that we are using deprecated API calls
  30 #include <ldap.h>
  31
  32
  33 /*
  34  * Utility function, supply a search result and get back the fullname (display name, common name, etc) from the first result
  35  */
  36 void derive_fullname_from_ldap_result(char *fullname, int fullname_size, LDAP *ldserver, LDAPMessage *search_result)
  37 {
  38         char **values;
  39
  40         if (fullname == NULL) return;
  41
  42         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
  43                 values = ldap_get_values(ldserver, search_result, "displayName");
  44                 if (values) {
  45                         if (values[0]) {
  46                                 if (fullname) safestrncpy(fullname, values[0], fullname_size);
  47                                 syslog(LOG_DEBUG, "ldap: displayName = %s", values[0]);
  48                         }
  49                         ldap_value_free(values);
  50                 }
  51         }
  52         else {
  53                 values = ldap_get_values(ldserver, search_result, "cn");
  54                 if (values) {
  55                         if (values[0]) {
  56                                 if (fullname) safestrncpy(fullname, values[0], fullname_size);
  57                                 syslog(LOG_DEBUG, "ldap: cn = %s", values[0]);
  58                         }
  59                         ldap_value_free(values);
  60                 }
  61         }
  62 }
  63
  64
  65 /*
  66  * Utility function, supply a search result and get back the uid from the first result
  67  */
  68 uid_t derive_uid_from_ldap(LDAP *ldserver, LDAPMessage *entry)
  69 {
  70         char **values;
  71         uid_t uid = (-1);
  72
  73         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
  74                 values = ldap_get_values(ldserver, entry, "objectGUID");        // AD schema: uid hashed from objectGUID
  75                 if (values) {
  76                         if (values[0]) {
  77                                 uid = abs(HashLittle(values[0], strlen(values[0])));
  78                         }
  79                         ldap_value_free(values);
  80                 }
  81         }
  82         else {
  83                 values = ldap_get_values(ldserver, entry, "uidNumber");         // POSIX schema: uid = uidNumber
  84                 if (values) {
  85                         if (values[0]) {
  86                                 uid = atoi(values[0]);
  87                         }
  88                         ldap_value_free(values);
  89                 }
  90         }
  91
  92         return(uid);
  93 }
  94
  95
  96 /*
  97  * Wrapper function for ldap_initialize() that consistently fills in the correct fields
  98  */
  99 int ctdl_ldap_initialize(LDAP **ld) {
 100
 101         char server_url[256];
 102         int ret;
 103
 104         snprintf(server_url, sizeof server_url, "ldap://%s:%d", CtdlGetConfigStr("c_ldap_host"), CtdlGetConfigInt("c_ldap_port"));
 105         ret = ldap_initialize(ld, server_url);
 106         if (ret != LDAP_SUCCESS) {
 107                 syslog(LOG_ERR, "ldap: could not connect to %s : %m", server_url);
 108                 *ld = NULL;
 109                 return(errno);
 110         }
 111
 112         return(ret);
 113 }
 114
 115
 116 /*
 117  * Bind to the LDAP server and return a working handle
 118  */
 119 LDAP *ctdl_ldap_bind(void) {
 120         LDAP *ldserver = NULL;
 121         int i;
 122
 123         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 124                 return(NULL);
 125         }
 126
 127         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 128         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 129
 130         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 131         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 132         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 133         i = ldap_simple_bind_s(ldserver,
 134                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 135                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 136         );
 137         if (i != LDAP_SUCCESS) {
 138                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 139                 return(NULL);
 140         }
 141
 142         return(ldserver);
 143 }
 144
 145
 146 /*
 147  * Look up a user in the directory to see if this is an account that can be authenticated
 148  */
 149 int CtdlTryUserLDAP(char *username,
 150                 char *found_dn, int found_dn_size,
 151                 char *fullname, int fullname_size,
 152                 uid_t *uid)
 153 {
 154         LDAP *ldserver = NULL;
 155         LDAPMessage *search_result = NULL;
 156         LDAPMessage *entry = NULL;
 157         char searchstring[1024];
 158         struct timeval tv;
 159         char *user_dn = NULL;
 160
 161         ldserver = ctdl_ldap_bind();
 162         if (!ldserver) return(-1);
 163
 164         if (fullname) safestrncpy(fullname, username, fullname_size);
 165         tv.tv_sec = 10;
 166         tv.tv_usec = 0;
 167
 168         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 169                 snprintf(searchstring, sizeof(searchstring), "(sAMAccountName=%s)", username);
 170         }
 171         else {
 172                 snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(cn=%s))", username);
 173                 // snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(uid=%s))", username);
 174         }
 175
 176         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 177         (void) ldap_search_ext_s(
 178                 ldserver,                                       /* ld                           */
 179                 CtdlGetConfigStr("c_ldap_base_dn"),             /* base                         */
 180                 LDAP_SCOPE_SUBTREE,                             /* scope                        */
 181                 searchstring,                                   /* filter                       */
 182                 NULL,                                           /* attrs (all attributes)       */
 183                 0,                                              /* attrsonly (attrs + values)   */
 184                 NULL,                                           /* serverctrls (none)           */
 185                 NULL,                                           /* clientctrls (none)           */
 186                 &tv,                                            /* timeout                      */
 187                 1,                                              /* sizelimit (1 result max)     */
 188                 &search_result                                  /* res                          */
 189         );
 190
 191         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 192          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 193          */
 194         if (search_result == NULL) {
 195                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 196                 ldap_unbind(ldserver);
 197                 return(2);
 198         }
 199
 200         /* At this point we've got at least one result from our query.  If there are multiple
 201          * results, we still only look at the first one.
 202          */
 203         entry = ldap_first_entry(ldserver, search_result);
 204         if (entry) {
 205
 206                 user_dn = ldap_get_dn(ldserver, entry);
 207                 if (user_dn) {
 208                         syslog(LOG_DEBUG, "ldap: dn = %s", user_dn);
 209                 }
 210
 211                 derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, search_result);
 212                 *uid = derive_uid_from_ldap(ldserver, search_result);
 213         }
 214
 215         /* free the results */
 216         ldap_msgfree(search_result);
 217
 218         /* unbind so we can go back in as the authenticating user */
 219         ldap_unbind(ldserver);
 220
 221         if (!user_dn) {
 222                 syslog(LOG_DEBUG, "ldap: No such user was found.");
 223                 return(4);
 224         }
 225
 226         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 227         ldap_memfree(user_dn);
 228         return(0);
 229 }
 230
 231
 232 int CtdlTryPasswordLDAP(char *user_dn, const char *password)
 233 {
 234         LDAP *ldserver = NULL;
 235         int i = (-1);
 236
 237         if (IsEmptyStr(password)) {
 238                 syslog(LOG_DEBUG, "ldap: empty passwords are not permitted");
 239                 return(1);
 240         }
 241
 242         syslog(LOG_DEBUG, "ldap: trying to bind as %s", user_dn);
 243         i = ctdl_ldap_initialize(&ldserver);
 244         if (i == LDAP_SUCCESS) {
 245                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 246                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 247                 if (i == LDAP_SUCCESS) {
 248                         syslog(LOG_DEBUG, "ldap: bind succeeded");
 249                 }
 250                 else {
 251                         syslog(LOG_DEBUG, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 252                 }
 253                 ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 254                 ldap_unbind(ldserver);
 255         }
 256
 257         if (i == LDAP_SUCCESS) {
 258                 return(0);
 259         }
 260
 261         return(1);
 262 }
 263
 264
 265 //return !0 iff property changed.
 266 int vcard_set_props_iff_different(struct vCard *v,char *propname,int numvals, char **vals) {
 267         int i;
 268         char *oldval = "";
 269         for(i=0;i<numvals;i++) {
 270           oldval = vcard_get_prop(v,propname,0,i,0);
 271           if (oldval == NULL) break;
 272           if (strcmp(vals[i],oldval)) break;
 273         }
 274         if (i!=numvals) {
 275                 syslog(LOG_DEBUG, "ldap: vcard property %s, element %d of %d changed from %s to %s\n", propname, i, numvals, oldval, vals[i]);
 276                 for(i=0;i<numvals;i++) vcard_set_prop(v,propname,vals[i],(i==0) ? 0 : 1);
 277                 return 1;
 278         }
 279         return 0;
 280 }
 281
 282
 283 //return !0 iff property changed.
 284 int vcard_set_one_prop_iff_different(struct vCard *v,char *propname, char *newfmt, ...) {
 285         va_list args;
 286         char *newvalue;
 287         int changed_something;
 288         va_start(args,newfmt);
 289         if (-1==vasprintf(&newvalue,newfmt,args)) {
 290                 syslog(LOG_ERR, "ldap: out of memory!");
 291                 return 0;
 292         }
 293         changed_something = vcard_set_props_iff_different(v,propname,1,&newvalue);
 294         va_end(args);
 295         free(newvalue);
 296         return changed_something;
 297 }
 298
 299
 300 /*
 301  * Learn LDAP attributes and stuff them into the vCard.
 302  * Returns nonzero if we changed anything.
 303  */
 304 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 305 {
 306         int changed_something = 0;
 307         LDAP *ldserver = NULL;
 308         struct timeval tv;
 309         LDAPMessage *search_result = NULL;
 310         LDAPMessage *entry = NULL;
 311         char **givenName;
 312         char **sn;
 313         char **cn;
 314         char **initials;
 315         char **o;
 316         char **street;
 317         char **l;
 318         char **st;
 319         char **postalCode;
 320         char **telephoneNumber;
 321         char **mobile;
 322         char **homePhone;
 323         char **facsimileTelephoneNumber;
 324         char **mail;
 325         char **uid;
 326         char **homeDirectory;
 327         char **uidNumber;
 328         char **loginShell;
 329         char **gidNumber;
 330         char **c;
 331         char **title;
 332         char **uuid;
 333         char *attrs[] = { "*","+",NULL};
 334
 335         if (!ldap_dn) return(0);
 336         if (!v) return(0);
 337
 338         ldserver = ctdl_ldap_bind();
 339         if (!ldserver) return(-1);
 340
 341         tv.tv_sec = 10;
 342         tv.tv_usec = 0;
 343
 344         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 345         (void) ldap_search_ext_s(
 346                 ldserver,                               // ld
 347                 ldap_dn,                                // base
 348                 LDAP_SCOPE_SUBTREE,                     // scope
 349                 NULL,                                   // filter
 350                 attrs,                                  // attrs (all attributes)
 351                 0,                                      // attrsonly (attrs + values)
 352                 NULL,                                   // serverctrls (none)
 353                 NULL,                                   // clientctrls (none)
 354                 &tv,                                    // timeout
 355                 1,                                      // sizelimit (1 result max)
 356                 &search_result                          // res
 357         );
 358
 359         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 360          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 361          */
 362         if (search_result == NULL) {
 363                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 364                 ldap_unbind(ldserver);
 365                 return(0);
 366         }
 367
 368         /* At this point we've got at least one result from our query.  If there are multiple
 369          * results, we still only look at the first one.
 370          */
 371         entry = ldap_first_entry(ldserver, search_result);
 372         if (entry) {
 373                 syslog(LOG_DEBUG, "ldap: search got user details for vcard.");
 374                 givenName=ldap_get_values(ldserver, search_result, "givenName");
 375                 sn=ldap_get_values(ldserver, search_result, "sn");
 376                 cn=ldap_get_values(ldserver, search_result, "cn");
 377                 initials=ldap_get_values(ldserver, search_result, "initials");
 378                 title=ldap_get_values(ldserver, search_result, "title");
 379                 o=ldap_get_values(ldserver, search_result, "o");
 380                 street=ldap_get_values(ldserver, search_result, "street");
 381                 l=ldap_get_values(ldserver, search_result, "l");
 382                 st=ldap_get_values(ldserver, search_result, "st");
 383                 postalCode=ldap_get_values(ldserver, search_result, "postalCode");
 384                 telephoneNumber=ldap_get_values(ldserver, search_result, "telephoneNumber");
 385                 mobile=ldap_get_values(ldserver, search_result, "mobile");
 386                 homePhone=ldap_get_values(ldserver, search_result, "homePhone");
 387                 facsimileTelephoneNumber=ldap_get_values(ldserver, search_result, "facsimileTelephoneNumber");
 388                 mail=ldap_get_values(ldserver, search_result, "mail");
 389                 uid=ldap_get_values(ldserver, search_result, "uid");
 390                 homeDirectory=ldap_get_values(ldserver, search_result, "homeDirectory");
 391                 uidNumber=ldap_get_values(ldserver, search_result, "uidNumber");
 392                 loginShell=ldap_get_values(ldserver, search_result, "loginShell");
 393                 gidNumber=ldap_get_values(ldserver, search_result, "gidNumber");
 394                 c=ldap_get_values(ldserver, search_result, "c");
 395                 uuid=ldap_get_values(ldserver, search_result, "entryUUID");
 396
 397                 if (street && l && st && postalCode && c) changed_something |= vcard_set_one_prop_iff_different(v,"adr",";;%s;%s;%s;%s;%s",street[0],l[0],st[0],postalCode[0],c[0]);
 398                 if (telephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;work","%s",telephoneNumber[0]);
 399                 if (facsimileTelephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;fax","%s",facsimileTelephoneNumber[0]);
 400                 if (mobile) changed_something |= vcard_set_one_prop_iff_different(v,"tel;cell","%s",mobile[0]);
 401                 if (homePhone) changed_something |= vcard_set_one_prop_iff_different(v,"tel;home","%s",homePhone[0]);
 402                 if (givenName && sn) {
 403                         if (initials) {
 404                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s;%s",sn[0],givenName[0],initials[0]);
 405                         }
 406                         else {
 407                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s",sn[0],givenName[0]);
 408                         }
 409                 }
 410                 if (mail) {
 411                         changed_something |= vcard_set_props_iff_different(v,"email;internet",ldap_count_values(mail),mail);
 412                 }
 413                 if (uuid) changed_something |= vcard_set_one_prop_iff_different(v,"X-uuid","%s",uuid[0]);
 414                 if (o) changed_something |= vcard_set_one_prop_iff_different(v,"org","%s",o[0]);
 415                 if (cn) changed_something |= vcard_set_one_prop_iff_different(v,"fn","%s",cn[0]);
 416                 if (title) changed_something |= vcard_set_one_prop_iff_different(v,"title","%s",title[0]);
 417
 418                 if (givenName) ldap_value_free(givenName);
 419                 if (initials) ldap_value_free(initials);
 420                 if (sn) ldap_value_free(sn);
 421                 if (cn) ldap_value_free(cn);
 422                 if (o) ldap_value_free(o);
 423                 if (street) ldap_value_free(street);
 424                 if (l) ldap_value_free(l);
 425                 if (st) ldap_value_free(st);
 426                 if (postalCode) ldap_value_free(postalCode);
 427                 if (telephoneNumber) ldap_value_free(telephoneNumber);
 428                 if (mobile) ldap_value_free(mobile);
 429                 if (homePhone) ldap_value_free(homePhone);
 430                 if (facsimileTelephoneNumber) ldap_value_free(facsimileTelephoneNumber);
 431                 if (mail) ldap_value_free(mail);
 432                 if (uid) ldap_value_free(uid);
 433                 if (homeDirectory) ldap_value_free(homeDirectory);
 434                 if (uidNumber) ldap_value_free(uidNumber);
 435                 if (loginShell) ldap_value_free(loginShell);
 436                 if (gidNumber) ldap_value_free(gidNumber);
 437                 if (c) ldap_value_free(c);
 438                 if (title) ldap_value_free(title);
 439                 if (uuid) ldap_value_free(uuid);
 440         }
 441         /* free the results */
 442         ldap_msgfree(search_result);
 443
 444         /* unbind so we can go back in as the authenticating user */
 445         ldap_unbind(ldserver);
 446         return(changed_something);      /* tell the caller whether we made any changes */
 447 }
 448
 449
 450 /*
 451  * Extract a user's Internet email addresses from LDAP.
 452  * Returns zero if we got a valid set of addresses; nonzero for error.
 453  */
 454 int extract_email_addresses_from_ldap(char *ldap_dn, char *emailaddrs)
 455 {
 456         LDAP *ldserver = NULL;
 457         struct timeval tv;
 458         LDAPMessage *search_result = NULL;
 459         LDAPMessage *entry = NULL;
 460         char **mail;
 461         char *attrs[] = { "*","+",NULL};
 462
 463         if (!ldap_dn) return(1);
 464         if (!emailaddrs) return(1);
 465
 466         ldserver = ctdl_ldap_bind();
 467         if (!ldserver) return(-1);
 468
 469         tv.tv_sec = 10;
 470         tv.tv_usec = 0;
 471
 472         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 473         (void) ldap_search_ext_s(
 474                 ldserver,                               // ld
 475                 ldap_dn,                                // base
 476                 LDAP_SCOPE_SUBTREE,                     // scope
 477                 NULL,                                   // filter
 478                 attrs,                                  // attrs (all attributes)
 479                 0,                                      // attrsonly (attrs + values)
 480                 NULL,                                   // serverctrls (none)
 481                 NULL,                                   // clientctrls (none)
 482                 &tv,                                    // timeout
 483                 1,                                      // sizelimit (1 result max)
 484                 &search_result                          // res
 485         );
 486
 487         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 488          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 489          */
 490         if (search_result == NULL) {
 491                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 492                 ldap_unbind(ldserver);
 493                 return(4);
 494         }
 495
 496         /* At this point we've got at least one result from our query.  If there are multiple
 497          * results, we still only look at the first one.
 498          */
 499         emailaddrs[0] = 0;      /* clear out any previous results */
 500         entry = ldap_first_entry(ldserver, search_result);
 501         if (entry) {
 502                 syslog(LOG_DEBUG, "ldap: search got user details");
 503                 mail = ldap_get_values(ldserver, search_result, "mail");
 504
 505                 if (mail) {
 506                         int q;
 507                         for (q=0; q<ldap_count_values(mail); ++q) {
 508                                 if (IsDirectory(mail[q], 0)) {
 509                                         if ((strlen(emailaddrs) + strlen(mail[q]) + 2) > 512) {
 510                                                 syslog(LOG_ERR, "ldap: can't fit all email addresses into user record");
 511                                         }
 512                                         else {
 513                                                 if (!IsEmptyStr(emailaddrs)) {
 514                                                         strcat(emailaddrs, "|");
 515                                                 }
 516                                                 strcat(emailaddrs, mail[q]);
 517                                         }
 518                                 }
 519                         }
 520                 }
 521         }
 522
 523         /* free the results */
 524         ldap_msgfree(search_result);
 525
 526         /* unbind so we can go back in as the authenticating user */
 527         ldap_unbind(ldserver);
 528         return(0);
 529 }
 530
 531
 532 /*
 533  * Scan LDAP for users and populate Citadel's user database with everyone
 534  */
 535 void CtdlSynchronizeUsersFromLDAP(void)
 536 {
 537         LDAP *ldserver = NULL;
 538         LDAPMessage *search_result = NULL;
 539         LDAPMessage *entry = NULL;
 540         char *user_dn = NULL;
 541         char searchstring[1024];
 542         struct timeval tv;
 543
 544         if ((CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP) && (CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP_AD)) {
 545                 return;         // not running LDAP
 546         }
 547
 548         syslog(LOG_INFO, "ldap: synchronizing Citadel user database from LDAP");
 549
 550         ldserver = ctdl_ldap_bind();
 551         if (!ldserver) return;
 552
 553         tv.tv_sec = 10;
 554         tv.tv_usec = 0;
 555
 556         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 557                         snprintf(searchstring, sizeof(searchstring), "(&(objectClass=user)(objectClass=person)(!(objectClass=computer)))");
 558         } else {
 559                         snprintf(searchstring, sizeof(searchstring), "(objectClass=inetOrgPerson)");
 560         }
 561
 562         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 563         (void) ldap_search_ext_s(
 564                 ldserver,                                       // ld
 565                 CtdlGetConfigStr("c_ldap_base_dn"),             // base
 566                 LDAP_SCOPE_SUBTREE,                             // scope
 567                 searchstring,                                   // filter
 568                 NULL,                                           // attrs (all attributes)
 569                 0,                                              // attrsonly (attrs + values)
 570                 NULL,                                           // serverctrls (none)
 571                 NULL,                                           // clientctrls (none)
 572                 &tv,                                            // timeout
 573                 INT_MAX,                                        // sizelimit (max)
 574                 &search_result                                  // result
 575         );
 576
 577         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 578          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 579          */
 580         if (search_result == NULL) {
 581                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 582                 ldap_unbind(ldserver);
 583                 return;
 584         }
 585
 586         syslog(LOG_DEBUG, "ldap: %d entries returned", ldap_count_entries(ldserver, search_result));
 587         entry = ldap_first_entry(ldserver, search_result);
 588         while (entry) {
 589
 590                 user_dn = ldap_get_dn(ldserver, entry);
 591                 if (user_dn) {
 592                         syslog(LOG_DEBUG, "ldap: found %s", user_dn);
 593
 594                         int fullname_size = 256;
 595                         char fullname[256] = { 0 } ;
 596                         uid_t uid = (-1);
 597
 598                         derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, entry);
 599                         uid = derive_uid_from_ldap(ldserver, entry);
 600                         syslog(LOG_DEBUG, "\033[33mldap: display name: <%s> , uid = <%d>\033[0m", fullname, uid);
 601
 602                         // FIXME now create or update the user
 603                         int i;
 604                         struct ctdluser usbuf;
 605
 606                         i = getuserbyuid(&usbuf, uid);
 607                         if (i == 0) {
 608                                 syslog(LOG_DEBUG, "\033[32m...and that user EXISTZ0RS!!!\033[0m");
 609                         }
 610                         else {
 611                                 syslog(LOG_DEBUG, "\033[31m...and that user D0EZ N0T EXISTZ0R!!\033[0m");
 612                         }
 613
 614
 615                 }
 616
 617                 entry = ldap_next_entry(ldserver, entry);
 618         }
 619
 620         /* free the results */
 621         ldap_msgfree(search_result);
 622
 623         /* unbind so we can go back in as the authenticating user */
 624         ldap_unbind(ldserver);
 625 }
 626
 627 #endif /* HAVE_LDAP */