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  * Look up a user in the directory to see if this is an account that can be authenticated
 118  */
 119 int CtdlTryUserLDAP(char *username,
 120                 char *found_dn, int found_dn_size,
 121                 char *fullname, int fullname_size,
 122                 uid_t *uid)
 123 {
 124         LDAP *ldserver = NULL;
 125         int i;
 126         LDAPMessage *search_result = NULL;
 127         LDAPMessage *entry = NULL;
 128         char searchstring[1024];
 129         struct timeval tv;
 130         char *user_dn = NULL;
 131
 132         if (fullname) safestrncpy(fullname, username, fullname_size);
 133
 134         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 135                 return(errno);
 136         }
 137
 138         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 139         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 140
 141         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 142         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 143         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 144         i = ldap_simple_bind_s(ldserver,
 145                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 146                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 147         );
 148         if (i != LDAP_SUCCESS) {
 149                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 150                 return(i);
 151         }
 152
 153         tv.tv_sec = 10;
 154         tv.tv_usec = 0;
 155
 156         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 157                 snprintf(searchstring, sizeof(searchstring), "(sAMAccountName=%s)", username);
 158         }
 159         else {
 160                 snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(cn=%s))", username);
 161                 // snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(uid=%s))", username);
 162         }
 163
 164         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 165         (void) ldap_search_ext_s(
 166                 ldserver,                                       /* ld                           */
 167                 CtdlGetConfigStr("c_ldap_base_dn"),             /* base                         */
 168                 LDAP_SCOPE_SUBTREE,                             /* scope                        */
 169                 searchstring,                                   /* filter                       */
 170                 NULL,                                           /* attrs (all attributes)       */
 171                 0,                                              /* attrsonly (attrs + values)   */
 172                 NULL,                                           /* serverctrls (none)           */
 173                 NULL,                                           /* clientctrls (none)           */
 174                 &tv,                                            /* timeout                      */
 175                 1,                                              /* sizelimit (1 result max)     */
 176                 &search_result                                  /* res                          */
 177         );
 178
 179         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 180          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 181          */
 182         if (search_result == NULL) {
 183                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 184                 ldap_unbind(ldserver);
 185                 return(2);
 186         }
 187
 188         /* At this point we've got at least one result from our query.  If there are multiple
 189          * results, we still only look at the first one.
 190          */
 191         entry = ldap_first_entry(ldserver, search_result);
 192         if (entry) {
 193
 194                 user_dn = ldap_get_dn(ldserver, entry);
 195                 if (user_dn) {
 196                         syslog(LOG_DEBUG, "ldap: dn = %s", user_dn);
 197                 }
 198
 199                 derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, search_result);
 200                 *uid = derive_uid_from_ldap(ldserver, search_result);
 201         }
 202
 203         /* free the results */
 204         ldap_msgfree(search_result);
 205
 206         /* unbind so we can go back in as the authenticating user */
 207         ldap_unbind(ldserver);
 208
 209         if (!user_dn) {
 210                 syslog(LOG_DEBUG, "ldap: No such user was found.");
 211                 return(4);
 212         }
 213
 214         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 215         ldap_memfree(user_dn);
 216         return(0);
 217 }
 218
 219
 220 int CtdlTryPasswordLDAP(char *user_dn, const char *password)
 221 {
 222         LDAP *ldserver = NULL;
 223         int i = (-1);
 224
 225         if (IsEmptyStr(password)) {
 226                 syslog(LOG_DEBUG, "ldap: empty passwords are not permitted");
 227                 return(1);
 228         }
 229
 230         syslog(LOG_DEBUG, "ldap: trying to bind as %s", user_dn);
 231         i = ctdl_ldap_initialize(&ldserver);
 232         if (i == LDAP_SUCCESS) {
 233                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 234                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 235                 if (i == LDAP_SUCCESS) {
 236                         syslog(LOG_DEBUG, "ldap: bind succeeded");
 237                 }
 238                 else {
 239                         syslog(LOG_DEBUG, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 240                 }
 241                 ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 242                 ldap_unbind(ldserver);
 243         }
 244
 245         if (i == LDAP_SUCCESS) {
 246                 return(0);
 247         }
 248
 249         return(1);
 250 }
 251
 252
 253 //return !0 iff property changed.
 254 int vcard_set_props_iff_different(struct vCard *v,char *propname,int numvals, char **vals) {
 255         int i;
 256         char *oldval = "";
 257         for(i=0;i<numvals;i++) {
 258           oldval = vcard_get_prop(v,propname,0,i,0);
 259           if (oldval == NULL) break;
 260           if (strcmp(vals[i],oldval)) break;
 261         }
 262         if (i!=numvals) {
 263                 syslog(LOG_DEBUG, "ldap: vcard property %s, element %d of %d changed from %s to %s\n", propname, i, numvals, oldval, vals[i]);
 264                 for(i=0;i<numvals;i++) vcard_set_prop(v,propname,vals[i],(i==0) ? 0 : 1);
 265                 return 1;
 266         }
 267         return 0;
 268 }
 269
 270
 271 //return !0 iff property changed.
 272 int vcard_set_one_prop_iff_different(struct vCard *v,char *propname, char *newfmt, ...) {
 273         va_list args;
 274         char *newvalue;
 275         int changed_something;
 276         va_start(args,newfmt);
 277         if (-1==vasprintf(&newvalue,newfmt,args)) {
 278                 syslog(LOG_ERR, "ldap: out of memory!");
 279                 return 0;
 280         }
 281         changed_something = vcard_set_props_iff_different(v,propname,1,&newvalue);
 282         va_end(args);
 283         free(newvalue);
 284         return changed_something;
 285 }
 286
 287
 288 /*
 289  * Learn LDAP attributes and stuff them into the vCard.
 290  * Returns nonzero if we changed anything.
 291  */
 292 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 293 {
 294         int changed_something = 0;
 295         LDAP *ldserver = NULL;
 296         int i;
 297         struct timeval tv;
 298         LDAPMessage *search_result = NULL;
 299         LDAPMessage *entry = NULL;
 300         char **givenName;
 301         char **sn;
 302         char **cn;
 303         char **initials;
 304         char **o;
 305         char **street;
 306         char **l;
 307         char **st;
 308         char **postalCode;
 309         char **telephoneNumber;
 310         char **mobile;
 311         char **homePhone;
 312         char **facsimileTelephoneNumber;
 313         char **mail;
 314         char **uid;
 315         char **homeDirectory;
 316         char **uidNumber;
 317         char **loginShell;
 318         char **gidNumber;
 319         char **c;
 320         char **title;
 321         char **uuid;
 322         char *attrs[] = { "*","+",NULL};
 323
 324         if (!ldap_dn) return(0);
 325         if (!v) return(0);
 326
 327         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 328                 return(0);
 329         }
 330
 331         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 332         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 333
 334         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 335         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 336         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 337         i = ldap_simple_bind_s(ldserver,
 338                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 339                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 340         );
 341         if (i != LDAP_SUCCESS) {
 342                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 343                 return(0);
 344         }
 345
 346         tv.tv_sec = 10;
 347         tv.tv_usec = 0;
 348
 349         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 350         (void) ldap_search_ext_s(
 351                 ldserver,                               // ld
 352                 ldap_dn,                                // base
 353                 LDAP_SCOPE_SUBTREE,                     // scope
 354                 NULL,                                   // filter
 355                 attrs,                                  // attrs (all attributes)
 356                 0,                                      // attrsonly (attrs + values)
 357                 NULL,                                   // serverctrls (none)
 358                 NULL,                                   // clientctrls (none)
 359                 &tv,                                    // timeout
 360                 1,                                      // sizelimit (1 result max)
 361                 &search_result                          // res
 362         );
 363
 364         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 365          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 366          */
 367         if (search_result == NULL) {
 368                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 369                 ldap_unbind(ldserver);
 370                 return(0);
 371         }
 372
 373         /* At this point we've got at least one result from our query.  If there are multiple
 374          * results, we still only look at the first one.
 375          */
 376         entry = ldap_first_entry(ldserver, search_result);
 377         if (entry) {
 378                 syslog(LOG_DEBUG, "ldap: search got user details for vcard.");
 379                 givenName=ldap_get_values(ldserver, search_result, "givenName");
 380                 sn=ldap_get_values(ldserver, search_result, "sn");
 381                 cn=ldap_get_values(ldserver, search_result, "cn");
 382                 initials=ldap_get_values(ldserver, search_result, "initials");
 383                 title=ldap_get_values(ldserver, search_result, "title");
 384                 o=ldap_get_values(ldserver, search_result, "o");
 385                 street=ldap_get_values(ldserver, search_result, "street");
 386                 l=ldap_get_values(ldserver, search_result, "l");
 387                 st=ldap_get_values(ldserver, search_result, "st");
 388                 postalCode=ldap_get_values(ldserver, search_result, "postalCode");
 389                 telephoneNumber=ldap_get_values(ldserver, search_result, "telephoneNumber");
 390                 mobile=ldap_get_values(ldserver, search_result, "mobile");
 391                 homePhone=ldap_get_values(ldserver, search_result, "homePhone");
 392                 facsimileTelephoneNumber=ldap_get_values(ldserver, search_result, "facsimileTelephoneNumber");
 393                 mail=ldap_get_values(ldserver, search_result, "mail");
 394                 uid=ldap_get_values(ldserver, search_result, "uid");
 395                 homeDirectory=ldap_get_values(ldserver, search_result, "homeDirectory");
 396                 uidNumber=ldap_get_values(ldserver, search_result, "uidNumber");
 397                 loginShell=ldap_get_values(ldserver, search_result, "loginShell");
 398                 gidNumber=ldap_get_values(ldserver, search_result, "gidNumber");
 399                 c=ldap_get_values(ldserver, search_result, "c");
 400                 uuid=ldap_get_values(ldserver, search_result, "entryUUID");
 401
 402                 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]);
 403                 if (telephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;work","%s",telephoneNumber[0]);
 404                 if (facsimileTelephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;fax","%s",facsimileTelephoneNumber[0]);
 405                 if (mobile) changed_something |= vcard_set_one_prop_iff_different(v,"tel;cell","%s",mobile[0]);
 406                 if (homePhone) changed_something |= vcard_set_one_prop_iff_different(v,"tel;home","%s",homePhone[0]);
 407                 if (givenName && sn) {
 408                         if (initials) {
 409                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s;%s",sn[0],givenName[0],initials[0]);
 410                         }
 411                         else {
 412                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s",sn[0],givenName[0]);
 413                         }
 414                 }
 415                 if (mail) {
 416                         changed_something |= vcard_set_props_iff_different(v,"email;internet",ldap_count_values(mail),mail);
 417                 }
 418                 if (uuid) changed_something |= vcard_set_one_prop_iff_different(v,"X-uuid","%s",uuid[0]);
 419                 if (o) changed_something |= vcard_set_one_prop_iff_different(v,"org","%s",o[0]);
 420                 if (cn) changed_something |= vcard_set_one_prop_iff_different(v,"fn","%s",cn[0]);
 421                 if (title) changed_something |= vcard_set_one_prop_iff_different(v,"title","%s",title[0]);
 422
 423                 if (givenName) ldap_value_free(givenName);
 424                 if (initials) ldap_value_free(initials);
 425                 if (sn) ldap_value_free(sn);
 426                 if (cn) ldap_value_free(cn);
 427                 if (o) ldap_value_free(o);
 428                 if (street) ldap_value_free(street);
 429                 if (l) ldap_value_free(l);
 430                 if (st) ldap_value_free(st);
 431                 if (postalCode) ldap_value_free(postalCode);
 432                 if (telephoneNumber) ldap_value_free(telephoneNumber);
 433                 if (mobile) ldap_value_free(mobile);
 434                 if (homePhone) ldap_value_free(homePhone);
 435                 if (facsimileTelephoneNumber) ldap_value_free(facsimileTelephoneNumber);
 436                 if (mail) ldap_value_free(mail);
 437                 if (uid) ldap_value_free(uid);
 438                 if (homeDirectory) ldap_value_free(homeDirectory);
 439                 if (uidNumber) ldap_value_free(uidNumber);
 440                 if (loginShell) ldap_value_free(loginShell);
 441                 if (gidNumber) ldap_value_free(gidNumber);
 442                 if (c) ldap_value_free(c);
 443                 if (title) ldap_value_free(title);
 444                 if (uuid) ldap_value_free(uuid);
 445         }
 446         /* free the results */
 447         ldap_msgfree(search_result);
 448
 449         /* unbind so we can go back in as the authenticating user */
 450         ldap_unbind(ldserver);
 451         return(changed_something);      /* tell the caller whether we made any changes */
 452 }
 453
 454
 455 /*
 456  * Extract a user's Internet email addresses from LDAP.
 457  * Returns zero if we got a valid set of addresses; nonzero for error.
 458  */
 459 int extract_email_addresses_from_ldap(char *ldap_dn, char *emailaddrs)
 460 {
 461         LDAP *ldserver = NULL;
 462         int i;
 463         struct timeval tv;
 464         LDAPMessage *search_result = NULL;
 465         LDAPMessage *entry = NULL;
 466         char **mail;
 467         char *attrs[] = { "*","+",NULL};
 468
 469         if (!ldap_dn) return(1);
 470         if (!emailaddrs) return(1);
 471
 472         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 473                 return(2);
 474         }
 475
 476         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 477         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 478
 479         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 480         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 481         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 482         i = ldap_simple_bind_s(ldserver,
 483                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 484                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 485         );
 486         if (i != LDAP_SUCCESS) {
 487                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 488                 return(3);
 489         }
 490
 491         tv.tv_sec = 10;
 492         tv.tv_usec = 0;
 493
 494         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 495         (void) ldap_search_ext_s(
 496                 ldserver,                               // ld
 497                 ldap_dn,                                // base
 498                 LDAP_SCOPE_SUBTREE,                     // scope
 499                 NULL,                                   // filter
 500                 attrs,                                  // attrs (all attributes)
 501                 0,                                      // attrsonly (attrs + values)
 502                 NULL,                                   // serverctrls (none)
 503                 NULL,                                   // clientctrls (none)
 504                 &tv,                                    // timeout
 505                 1,                                      // sizelimit (1 result max)
 506                 &search_result                          // res
 507         );
 508
 509         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 510          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 511          */
 512         if (search_result == NULL) {
 513                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 514                 ldap_unbind(ldserver);
 515                 return(4);
 516         }
 517
 518         /* At this point we've got at least one result from our query.  If there are multiple
 519          * results, we still only look at the first one.
 520          */
 521         emailaddrs[0] = 0;      /* clear out any previous results */
 522         entry = ldap_first_entry(ldserver, search_result);
 523         if (entry) {
 524                 syslog(LOG_DEBUG, "ldap: search got user details");
 525                 mail = ldap_get_values(ldserver, search_result, "mail");
 526
 527                 if (mail) {
 528                         int q;
 529                         for (q=0; q<ldap_count_values(mail); ++q) {
 530                                 if (IsDirectory(mail[q], 0)) {
 531                                         if ((strlen(emailaddrs) + strlen(mail[q]) + 2) > 512) {
 532                                                 syslog(LOG_ERR, "ldap: can't fit all email addresses into user record");
 533                                         }
 534                                         else {
 535                                                 if (!IsEmptyStr(emailaddrs)) {
 536                                                         strcat(emailaddrs, "|");
 537                                                 }
 538                                                 strcat(emailaddrs, mail[q]);
 539                                         }
 540                                 }
 541                         }
 542                 }
 543         }
 544
 545         /* free the results */
 546         ldap_msgfree(search_result);
 547
 548         /* unbind so we can go back in as the authenticating user */
 549         ldap_unbind(ldserver);
 550         return(0);
 551 }
 552
 553
 554 /*
 555  * Scan LDAP for users and populate Citadel's user database with everyone
 556  */
 557 void CtdlSynchronizeUsersFromLDAP(void)
 558 {
 559         LDAP *ldserver = NULL;
 560         int i;
 561         LDAPMessage *search_result = NULL;
 562         LDAPMessage *entry = NULL;
 563         char *user_dn = NULL;
 564         char searchstring[1024];
 565         struct timeval tv;
 566
 567         if ((CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP) && (CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP_AD)) {
 568                 return;         // not running LDAP
 569         }
 570
 571         syslog(LOG_INFO, "ldap: synchronizing Citadel user database from LDAP");
 572
 573         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 574                 return;
 575         }
 576
 577         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 578         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 579
 580         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 581         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 582         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 583         i = ldap_simple_bind_s(ldserver,
 584                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 585                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 586         );
 587         if (i != LDAP_SUCCESS) {
 588                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 589                 return;
 590         }
 591
 592         tv.tv_sec = 10;
 593         tv.tv_usec = 0;
 594
 595         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 596                         snprintf(searchstring, sizeof(searchstring), "(&(objectClass=user)(objectClass=person)(!(objectClass=computer)))");
 597         } else {
 598                         snprintf(searchstring, sizeof(searchstring), "(objectClass=inetOrgPerson)");
 599         }
 600
 601         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 602         (void) ldap_search_ext_s(
 603                 ldserver,                                       // ld
 604                 CtdlGetConfigStr("c_ldap_base_dn"),             // base
 605                 LDAP_SCOPE_SUBTREE,                             // scope
 606                 searchstring,                                   // filter
 607                 NULL,                                           // attrs (all attributes)
 608                 0,                                              // attrsonly (attrs + values)
 609                 NULL,                                           // serverctrls (none)
 610                 NULL,                                           // clientctrls (none)
 611                 &tv,                                            // timeout
 612                 INT_MAX,                                        // sizelimit (max)
 613                 &search_result                                  // result
 614         );
 615
 616         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 617          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 618          */
 619         if (search_result == NULL) {
 620                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 621                 ldap_unbind(ldserver);
 622                 return;
 623         }
 624
 625         syslog(LOG_DEBUG, "ldap: %d entries returned", ldap_count_entries(ldserver, search_result));
 626         entry = ldap_first_entry(ldserver, search_result);
 627         while (entry) {
 628
 629                 user_dn = ldap_get_dn(ldserver, entry);
 630                 if (user_dn) {
 631                         syslog(LOG_DEBUG, "ldap: found %s", user_dn);
 632
 633                         int fullname_size = 256;
 634                         char fullname[256] = { 0 } ;
 635                         uid_t uid = (-1);
 636
 637                         derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, entry);
 638                         uid = derive_uid_from_ldap(ldserver, entry);
 639                         syslog(LOG_DEBUG, "\033[33mldap: display name: <%s> , uid = <%d>\033[0m", fullname, uid);
 640
 641                         // FIXME now create or update the user
 642
 643
 644                 }
 645
 646                 entry = ldap_next_entry(ldserver, entry);
 647         }
 648
 649         /* free the results */
 650         ldap_msgfree(search_result);
 651
 652         /* unbind so we can go back in as the authenticating user */
 653         ldap_unbind(ldserver);
 654 }
 655
 656 #endif /* HAVE_LDAP */