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  * Wrapper function for ldap_initialize() that consistently fills in the correct fields
  35  */
  36 int ctdl_ldap_initialize(LDAP **ld) {
  37
  38         char server_url[256];
  39         int ret;
  40
  41         snprintf(server_url, sizeof server_url, "ldap://%s:%d", CtdlGetConfigStr("c_ldap_host"), CtdlGetConfigInt("c_ldap_port"));
  42         ret = ldap_initialize(ld, server_url);
  43         if (ret != LDAP_SUCCESS) {
  44                 syslog(LOG_ERR, "ldap: could not connect to %s : %m", server_url);
  45                 *ld = NULL;
  46                 return(errno);
  47         }
  48
  49         return(ret);
  50 }
  51
  52
  53 /*
  54  * Look up a user in the directory to see if this is an account that can be authenticated
  55  */
  56 int CtdlTryUserLDAP(char *username,
  57                 char *found_dn, int found_dn_size,
  58                 char *fullname, int fullname_size,
  59                 uid_t *uid, int lookup_based_on_username)
  60 {
  61         LDAP *ldserver = NULL;
  62         int i;
  63         LDAPMessage *search_result = NULL;
  64         LDAPMessage *entry = NULL;
  65         char searchstring[1024];
  66         struct timeval tv;
  67         char **values;
  68         char *user_dn = NULL;
  69
  70         if (fullname) safestrncpy(fullname, username, fullname_size);
  71
  72         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
  73                 return(errno);
  74         }
  75
  76         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
  77         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
  78
  79         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
  80         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
  81         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
  82         i = ldap_simple_bind_s(ldserver,
  83                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
  84                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
  85         );
  86         if (i != LDAP_SUCCESS) {
  87                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
  88                 return(i);
  89         }
  90
  91         tv.tv_sec = 10;
  92         tv.tv_usec = 0;
  93
  94         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
  95                 if (lookup_based_on_username != 0)
  96                         snprintf(searchstring, sizeof(searchstring), "(displayName=%s)",username);
  97                 else
  98                         snprintf(searchstring, sizeof(searchstring), "(sAMAccountName=%s)", username);
  99         }
 100         else {
 101                 if (lookup_based_on_username != 0) {
 102                         snprintf(searchstring, sizeof(searchstring), "(cn=%s)",username);
 103                 }
 104                 else {
 105                         snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(uid=%s))", username);
 106                 }
 107         }
 108
 109         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 110         (void) ldap_search_ext_s(
 111                 ldserver,                                       /* ld                           */
 112                 CtdlGetConfigStr("c_ldap_base_dn"),             /* base                         */
 113                 LDAP_SCOPE_SUBTREE,                             /* scope                        */
 114                 searchstring,                                   /* filter                       */
 115                 NULL,                                           /* attrs (all attributes)       */
 116                 0,                                              /* attrsonly (attrs + values)   */
 117                 NULL,                                           /* serverctrls (none)           */
 118                 NULL,                                           /* clientctrls (none)           */
 119                 &tv,                                            /* timeout                      */
 120                 1,                                              /* sizelimit (1 result max)     */
 121                 &search_result                                  /* res                          */
 122         );
 123
 124         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 125          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 126          */
 127         if (search_result == NULL) {
 128                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 129                 ldap_unbind(ldserver);
 130                 return(2);
 131         }
 132
 133         /* At this point we've got at least one result from our query.  If there are multiple
 134          * results, we still only look at the first one.
 135          */
 136         entry = ldap_first_entry(ldserver, search_result);
 137         if (entry) {
 138
 139                 user_dn = ldap_get_dn(ldserver, entry);
 140                 if (user_dn) {
 141                         syslog(LOG_DEBUG, "ldap: dn = %s", user_dn);
 142                 }
 143
 144                 if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 145                         values = ldap_get_values(ldserver, search_result, "displayName");
 146                         if (values) {
 147                                 if (values[0]) {
 148                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 149                                         syslog(LOG_DEBUG, "ldap: displayName = %s", values[0]);
 150                                 }
 151                                 ldap_value_free(values);
 152                         }
 153                 }
 154                 else {
 155                         values = ldap_get_values(ldserver, search_result, "cn");
 156                         if (values) {
 157                                 if (values[0]) {
 158                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 159                                         syslog(LOG_DEBUG, "ldap: cn = %s", values[0]);
 160                                 }
 161                                 ldap_value_free(values);
 162                         }
 163                 }
 164                 /* If we know the username is the CN/displayName, we already set the uid*/
 165                 if (lookup_based_on_username==0) {
 166                         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 167                                 values = ldap_get_values(ldserver, search_result, "objectGUID");
 168                                 if (values) {
 169                                         if (values[0]) {
 170                                                 if (uid != NULL) {
 171                                                         *uid = abs(HashLittle(values[0], strlen(values[0])));
 172                                                         syslog(LOG_DEBUG, "ldap: uid hashed from objectGUID = %d", *uid);
 173                                                 }
 174                                         }
 175                                         ldap_value_free(values);
 176                                 }
 177                         }
 178                         else {
 179                                 values = ldap_get_values(ldserver, search_result, "uidNumber");
 180                                 if (values) {
 181                                         if (values[0]) {
 182                                                 syslog(LOG_DEBUG, "ldap: uidNumber = %s", values[0]);
 183                                                 if (uid != NULL) {
 184                                                         *uid = atoi(values[0]);
 185                                                 }
 186                                         }
 187                                         ldap_value_free(values);
 188                                 }
 189                         }
 190                 }
 191
 192         }
 193
 194         /* free the results */
 195         ldap_msgfree(search_result);
 196
 197         /* unbind so we can go back in as the authenticating user */
 198         ldap_unbind(ldserver);
 199
 200         if (!user_dn) {
 201                 syslog(LOG_DEBUG, "ldap: No such user was found.");
 202                 return(4);
 203         }
 204
 205         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 206         ldap_memfree(user_dn);
 207         return(0);
 208 }
 209
 210
 211 int CtdlTryPasswordLDAP(char *user_dn, const char *password)
 212 {
 213         LDAP *ldserver = NULL;
 214         int i = (-1);
 215
 216         if (IsEmptyStr(password)) {
 217                 syslog(LOG_DEBUG, "ldap: empty passwords are not permitted");
 218                 return(1);
 219         }
 220
 221         syslog(LOG_DEBUG, "ldap: trying to bind as %s", user_dn);
 222         i = ctdl_ldap_initialize(&ldserver);
 223         if (i == LDAP_SUCCESS) {
 224                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 225                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 226                 if (i == LDAP_SUCCESS) {
 227                         syslog(LOG_DEBUG, "ldap: bind succeeded");
 228                 }
 229                 else {
 230                         syslog(LOG_DEBUG, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 231                 }
 232                 ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 233                 ldap_unbind(ldserver);
 234         }
 235
 236         if (i == LDAP_SUCCESS) {
 237                 return(0);
 238         }
 239
 240         return(1);
 241 }
 242
 243
 244 //return !0 iff property changed.
 245 int vcard_set_props_iff_different(struct vCard *v,char *propname,int numvals, char **vals) {
 246         int i;
 247         char *oldval = "";
 248         for(i=0;i<numvals;i++) {
 249           oldval = vcard_get_prop(v,propname,0,i,0);
 250           if (oldval == NULL) break;
 251           if (strcmp(vals[i],oldval)) break;
 252         }
 253         if (i!=numvals) {
 254                 syslog(LOG_DEBUG, "ldap: vcard property %s, element %d of %d changed from %s to %s\n", propname, i, numvals, oldval, vals[i]);
 255                 for(i=0;i<numvals;i++) vcard_set_prop(v,propname,vals[i],(i==0) ? 0 : 1);
 256                 return 1;
 257         }
 258         return 0;
 259 }
 260
 261
 262 //return !0 iff property changed.
 263 int vcard_set_one_prop_iff_different(struct vCard *v,char *propname, char *newfmt, ...) {
 264         va_list args;
 265         char *newvalue;
 266         int changed_something;
 267         va_start(args,newfmt);
 268         if (-1==vasprintf(&newvalue,newfmt,args)) {
 269                 syslog(LOG_ERR, "ldap: out of memory!");
 270                 return 0;
 271         }
 272         changed_something = vcard_set_props_iff_different(v,propname,1,&newvalue);
 273         va_end(args);
 274         free(newvalue);
 275         return changed_something;
 276 }
 277
 278
 279 /*
 280  * Learn LDAP attributes and stuff them into the vCard.
 281  * Returns nonzero if we changed anything.
 282  */
 283 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 284 {
 285         int changed_something = 0;
 286         LDAP *ldserver = NULL;
 287         int i;
 288         struct timeval tv;
 289         LDAPMessage *search_result = NULL;
 290         LDAPMessage *entry = NULL;
 291         char **givenName;
 292         char **sn;
 293         char **cn;
 294         char **initials;
 295         char **o;
 296         char **street;
 297         char **l;
 298         char **st;
 299         char **postalCode;
 300         char **telephoneNumber;
 301         char **mobile;
 302         char **homePhone;
 303         char **facsimileTelephoneNumber;
 304         char **mail;
 305         char **uid;
 306         char **homeDirectory;
 307         char **uidNumber;
 308         char **loginShell;
 309         char **gidNumber;
 310         char **c;
 311         char **title;
 312         char **uuid;
 313         char *attrs[] = { "*","+",NULL};
 314
 315         if (!ldap_dn) return(0);
 316         if (!v) return(0);
 317
 318         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 319                 return(0);
 320         }
 321
 322         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 323         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 324
 325         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 326         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 327         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 328         i = ldap_simple_bind_s(ldserver,
 329                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 330                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 331         );
 332         if (i != LDAP_SUCCESS) {
 333                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 334                 return(0);
 335         }
 336
 337         tv.tv_sec = 10;
 338         tv.tv_usec = 0;
 339
 340         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 341         (void) ldap_search_ext_s(
 342                 ldserver,                               // ld
 343                 ldap_dn,                                // base
 344                 LDAP_SCOPE_SUBTREE,                     // scope
 345                 NULL,                                   // filter
 346                 attrs,                                  // attrs (all attributes)
 347                 0,                                      // attrsonly (attrs + values)
 348                 NULL,                                   // serverctrls (none)
 349                 NULL,                                   // clientctrls (none)
 350                 &tv,                                    // timeout
 351                 1,                                      // sizelimit (1 result max)
 352                 &search_result                          // res
 353         );
 354
 355         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 356          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 357          */
 358         if (search_result == NULL) {
 359                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 360                 ldap_unbind(ldserver);
 361                 return(0);
 362         }
 363
 364         /* At this point we've got at least one result from our query.  If there are multiple
 365          * results, we still only look at the first one.
 366          */
 367         entry = ldap_first_entry(ldserver, search_result);
 368         if (entry) {
 369                 syslog(LOG_DEBUG, "ldap: search got user details for vcard.");
 370                 givenName=ldap_get_values(ldserver, search_result, "givenName");
 371                 sn=ldap_get_values(ldserver, search_result, "sn");
 372                 cn=ldap_get_values(ldserver, search_result, "cn");
 373                 initials=ldap_get_values(ldserver, search_result, "initials");
 374                 title=ldap_get_values(ldserver, search_result, "title");
 375                 o=ldap_get_values(ldserver, search_result, "o");
 376                 street=ldap_get_values(ldserver, search_result, "street");
 377                 l=ldap_get_values(ldserver, search_result, "l");
 378                 st=ldap_get_values(ldserver, search_result, "st");
 379                 postalCode=ldap_get_values(ldserver, search_result, "postalCode");
 380                 telephoneNumber=ldap_get_values(ldserver, search_result, "telephoneNumber");
 381                 mobile=ldap_get_values(ldserver, search_result, "mobile");
 382                 homePhone=ldap_get_values(ldserver, search_result, "homePhone");
 383                 facsimileTelephoneNumber=ldap_get_values(ldserver, search_result, "facsimileTelephoneNumber");
 384                 mail=ldap_get_values(ldserver, search_result, "mail");
 385                 uid=ldap_get_values(ldserver, search_result, "uid");
 386                 homeDirectory=ldap_get_values(ldserver, search_result, "homeDirectory");
 387                 uidNumber=ldap_get_values(ldserver, search_result, "uidNumber");
 388                 loginShell=ldap_get_values(ldserver, search_result, "loginShell");
 389                 gidNumber=ldap_get_values(ldserver, search_result, "gidNumber");
 390                 c=ldap_get_values(ldserver, search_result, "c");
 391                 uuid=ldap_get_values(ldserver, search_result, "entryUUID");
 392
 393                 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]);
 394                 if (telephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;work","%s",telephoneNumber[0]);
 395                 if (facsimileTelephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;fax","%s",facsimileTelephoneNumber[0]);
 396                 if (mobile) changed_something |= vcard_set_one_prop_iff_different(v,"tel;cell","%s",mobile[0]);
 397                 if (homePhone) changed_something |= vcard_set_one_prop_iff_different(v,"tel;home","%s",homePhone[0]);
 398                 if (givenName && sn) {
 399                         if (initials) {
 400                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s;%s",sn[0],givenName[0],initials[0]);
 401                         }
 402                         else {
 403                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s",sn[0],givenName[0]);
 404                         }
 405                 }
 406                 if (mail) {
 407                         changed_something |= vcard_set_props_iff_different(v,"email;internet",ldap_count_values(mail),mail);
 408                 }
 409                 if (uuid) changed_something |= vcard_set_one_prop_iff_different(v,"X-uuid","%s",uuid[0]);
 410                 if (o) changed_something |= vcard_set_one_prop_iff_different(v,"org","%s",o[0]);
 411                 if (cn) changed_something |= vcard_set_one_prop_iff_different(v,"fn","%s",cn[0]);
 412                 if (title) changed_something |= vcard_set_one_prop_iff_different(v,"title","%s",title[0]);
 413
 414                 if (givenName) ldap_value_free(givenName);
 415                 if (initials) ldap_value_free(initials);
 416                 if (sn) ldap_value_free(sn);
 417                 if (cn) ldap_value_free(cn);
 418                 if (o) ldap_value_free(o);
 419                 if (street) ldap_value_free(street);
 420                 if (l) ldap_value_free(l);
 421                 if (st) ldap_value_free(st);
 422                 if (postalCode) ldap_value_free(postalCode);
 423                 if (telephoneNumber) ldap_value_free(telephoneNumber);
 424                 if (mobile) ldap_value_free(mobile);
 425                 if (homePhone) ldap_value_free(homePhone);
 426                 if (facsimileTelephoneNumber) ldap_value_free(facsimileTelephoneNumber);
 427                 if (mail) ldap_value_free(mail);
 428                 if (uid) ldap_value_free(uid);
 429                 if (homeDirectory) ldap_value_free(homeDirectory);
 430                 if (uidNumber) ldap_value_free(uidNumber);
 431                 if (loginShell) ldap_value_free(loginShell);
 432                 if (gidNumber) ldap_value_free(gidNumber);
 433                 if (c) ldap_value_free(c);
 434                 if (title) ldap_value_free(title);
 435                 if (uuid) ldap_value_free(uuid);
 436         }
 437         /* free the results */
 438         ldap_msgfree(search_result);
 439
 440         /* unbind so we can go back in as the authenticating user */
 441         ldap_unbind(ldserver);
 442         return(changed_something);      /* tell the caller whether we made any changes */
 443 }
 444
 445
 446 /*
 447  * Extract a user's Internet email addresses from LDAP.
 448  * Returns zero if we got a valid set of addresses; nonzero for error.
 449  */
 450 int extract_email_addresses_from_ldap(char *ldap_dn, char *emailaddrs)
 451 {
 452         LDAP *ldserver = NULL;
 453         int i;
 454         struct timeval tv;
 455         LDAPMessage *search_result = NULL;
 456         LDAPMessage *entry = NULL;
 457         char **mail;
 458         char *attrs[] = { "*","+",NULL};
 459
 460         if (!ldap_dn) return(1);
 461         if (!emailaddrs) return(1);
 462
 463         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 464                 return(2);
 465         }
 466
 467         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 468         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 469
 470         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 471         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 472         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 473         i = ldap_simple_bind_s(ldserver,
 474                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 475                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 476         );
 477         if (i != LDAP_SUCCESS) {
 478                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 479                 return(3);
 480         }
 481
 482         tv.tv_sec = 10;
 483         tv.tv_usec = 0;
 484
 485         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 486         (void) ldap_search_ext_s(
 487                 ldserver,                               // ld
 488                 ldap_dn,                                // base
 489                 LDAP_SCOPE_SUBTREE,                     // scope
 490                 NULL,                                   // filter
 491                 attrs,                                  // attrs (all attributes)
 492                 0,                                      // attrsonly (attrs + values)
 493                 NULL,                                   // serverctrls (none)
 494                 NULL,                                   // clientctrls (none)
 495                 &tv,                                    // timeout
 496                 1,                                      // sizelimit (1 result max)
 497                 &search_result                          // res
 498         );
 499
 500         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 501          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 502          */
 503         if (search_result == NULL) {
 504                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 505                 ldap_unbind(ldserver);
 506                 return(4);
 507         }
 508
 509         /* At this point we've got at least one result from our query.  If there are multiple
 510          * results, we still only look at the first one.
 511          */
 512         emailaddrs[0] = 0;      /* clear out any previous results */
 513         entry = ldap_first_entry(ldserver, search_result);
 514         if (entry) {
 515                 syslog(LOG_DEBUG, "ldap: search got user details");
 516                 mail=ldap_get_values(ldserver, search_result, "mail");
 517
 518                 if (mail) {
 519                         int q;
 520                         for (q=0; q<ldap_count_values(mail); ++q) {
 521                                 if (IsDirectory(mail[q], 0)) {
 522                                         syslog(LOG_DEBUG, "\035FIXME YES DIRECTORY %s\033[0m", mail[q]);
 523                                         if ((strlen(emailaddrs) + strlen(mail[q]) + 2) > 512) {
 524                                                 syslog(LOG_ERR, "ldap: can't fit all email addresses into user record");
 525                                         }
 526                                         else {
 527                                                 if (!IsEmptyStr(emailaddrs)) {
 528                                                         strcat(emailaddrs, "|");
 529                                                 }
 530                                                 strcat(emailaddrs, mail[q]);
 531                                         }
 532                                 }
 533                         }
 534                 }
 535         }
 536
 537         /* free the results */
 538         ldap_msgfree(search_result);
 539
 540         /* unbind so we can go back in as the authenticating user */
 541         ldap_unbind(ldserver);
 542         return(0);
 543 }
 544
 545 #endif /* HAVE_LDAP */