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         syslog(LOG_DEBUG, "\033[31mldap: display name: <%s> \033[0m", fullname);
  63 }
  64
  65
  66
  67
  68 /*
  69  * Wrapper function for ldap_initialize() that consistently fills in the correct fields
  70  */
  71 int ctdl_ldap_initialize(LDAP **ld) {
  72
  73         char server_url[256];
  74         int ret;
  75
  76         snprintf(server_url, sizeof server_url, "ldap://%s:%d", CtdlGetConfigStr("c_ldap_host"), CtdlGetConfigInt("c_ldap_port"));
  77         ret = ldap_initialize(ld, server_url);
  78         if (ret != LDAP_SUCCESS) {
  79                 syslog(LOG_ERR, "ldap: could not connect to %s : %m", server_url);
  80                 *ld = NULL;
  81                 return(errno);
  82         }
  83
  84         return(ret);
  85 }
  86
  87
  88 /*
  89  * Look up a user in the directory to see if this is an account that can be authenticated
  90  */
  91 int CtdlTryUserLDAP(char *username,
  92                 char *found_dn, int found_dn_size,
  93                 char *fullname, int fullname_size,
  94                 uid_t *uid, int lookup_based_on_username)
  95 {
  96         LDAP *ldserver = NULL;
  97         int i;
  98         LDAPMessage *search_result = NULL;
  99         LDAPMessage *entry = NULL;
 100         char searchstring[1024];
 101         struct timeval tv;
 102         char **values;
 103         char *user_dn = NULL;
 104
 105         if (fullname) safestrncpy(fullname, username, fullname_size);
 106
 107         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 108                 return(errno);
 109         }
 110
 111         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 112         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 113
 114         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 115         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 116         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 117         i = ldap_simple_bind_s(ldserver,
 118                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 119                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 120         );
 121         if (i != LDAP_SUCCESS) {
 122                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 123                 return(i);
 124         }
 125
 126         tv.tv_sec = 10;
 127         tv.tv_usec = 0;
 128
 129         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 130                 if (lookup_based_on_username != 0)
 131                         snprintf(searchstring, sizeof(searchstring), "(displayName=%s)",username);
 132                 else
 133                         snprintf(searchstring, sizeof(searchstring), "(sAMAccountName=%s)", username);
 134         }
 135         else {
 136                 if (lookup_based_on_username != 0) {
 137                         snprintf(searchstring, sizeof(searchstring), "(cn=%s)",username);
 138                 }
 139                 else {
 140                         snprintf(searchstring, sizeof(searchstring), "(&(objectclass=posixAccount)(uid=%s))", username);
 141                 }
 142         }
 143
 144         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 145         (void) ldap_search_ext_s(
 146                 ldserver,                                       /* ld                           */
 147                 CtdlGetConfigStr("c_ldap_base_dn"),             /* base                         */
 148                 LDAP_SCOPE_SUBTREE,                             /* scope                        */
 149                 searchstring,                                   /* filter                       */
 150                 NULL,                                           /* attrs (all attributes)       */
 151                 0,                                              /* attrsonly (attrs + values)   */
 152                 NULL,                                           /* serverctrls (none)           */
 153                 NULL,                                           /* clientctrls (none)           */
 154                 &tv,                                            /* timeout                      */
 155                 1,                                              /* sizelimit (1 result max)     */
 156                 &search_result                                  /* res                          */
 157         );
 158
 159         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 160          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 161          */
 162         if (search_result == NULL) {
 163                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 164                 ldap_unbind(ldserver);
 165                 return(2);
 166         }
 167
 168         /* At this point we've got at least one result from our query.  If there are multiple
 169          * results, we still only look at the first one.
 170          */
 171         entry = ldap_first_entry(ldserver, search_result);
 172         if (entry) {
 173
 174                 user_dn = ldap_get_dn(ldserver, entry);
 175                 if (user_dn) {
 176                         syslog(LOG_DEBUG, "ldap: dn = %s", user_dn);
 177                 }
 178
 179                 derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, search_result);
 180
 181                 /* If we know the username is the CN/displayName, we already set the uid*/
 182                 if (lookup_based_on_username==0) {
 183                         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 184                                 values = ldap_get_values(ldserver, search_result, "objectGUID");
 185                                 if (values) {
 186                                         if (values[0]) {
 187                                                 if (uid != NULL) {
 188                                                         *uid = abs(HashLittle(values[0], strlen(values[0])));
 189                                                         syslog(LOG_DEBUG, "ldap: uid hashed from objectGUID = %d", *uid);
 190                                                 }
 191                                         }
 192                                         ldap_value_free(values);
 193                                 }
 194                         }
 195                         else {
 196                                 values = ldap_get_values(ldserver, search_result, "uidNumber");
 197                                 if (values) {
 198                                         if (values[0]) {
 199                                                 syslog(LOG_DEBUG, "ldap: uidNumber = %s", values[0]);
 200                                                 if (uid != NULL) {
 201                                                         *uid = atoi(values[0]);
 202                                                 }
 203                                         }
 204                                         ldap_value_free(values);
 205                                 }
 206                         }
 207                 }
 208
 209         }
 210
 211         /* free the results */
 212         ldap_msgfree(search_result);
 213
 214         /* unbind so we can go back in as the authenticating user */
 215         ldap_unbind(ldserver);
 216
 217         if (!user_dn) {
 218                 syslog(LOG_DEBUG, "ldap: No such user was found.");
 219                 return(4);
 220         }
 221
 222         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 223         ldap_memfree(user_dn);
 224         return(0);
 225 }
 226
 227
 228 int CtdlTryPasswordLDAP(char *user_dn, const char *password)
 229 {
 230         LDAP *ldserver = NULL;
 231         int i = (-1);
 232
 233         if (IsEmptyStr(password)) {
 234                 syslog(LOG_DEBUG, "ldap: empty passwords are not permitted");
 235                 return(1);
 236         }
 237
 238         syslog(LOG_DEBUG, "ldap: trying to bind as %s", user_dn);
 239         i = ctdl_ldap_initialize(&ldserver);
 240         if (i == LDAP_SUCCESS) {
 241                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 242                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 243                 if (i == LDAP_SUCCESS) {
 244                         syslog(LOG_DEBUG, "ldap: bind succeeded");
 245                 }
 246                 else {
 247                         syslog(LOG_DEBUG, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 248                 }
 249                 ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 250                 ldap_unbind(ldserver);
 251         }
 252
 253         if (i == LDAP_SUCCESS) {
 254                 return(0);
 255         }
 256
 257         return(1);
 258 }
 259
 260
 261 //return !0 iff property changed.
 262 int vcard_set_props_iff_different(struct vCard *v,char *propname,int numvals, char **vals) {
 263         int i;
 264         char *oldval = "";
 265         for(i=0;i<numvals;i++) {
 266           oldval = vcard_get_prop(v,propname,0,i,0);
 267           if (oldval == NULL) break;
 268           if (strcmp(vals[i],oldval)) break;
 269         }
 270         if (i!=numvals) {
 271                 syslog(LOG_DEBUG, "ldap: vcard property %s, element %d of %d changed from %s to %s\n", propname, i, numvals, oldval, vals[i]);
 272                 for(i=0;i<numvals;i++) vcard_set_prop(v,propname,vals[i],(i==0) ? 0 : 1);
 273                 return 1;
 274         }
 275         return 0;
 276 }
 277
 278
 279 //return !0 iff property changed.
 280 int vcard_set_one_prop_iff_different(struct vCard *v,char *propname, char *newfmt, ...) {
 281         va_list args;
 282         char *newvalue;
 283         int changed_something;
 284         va_start(args,newfmt);
 285         if (-1==vasprintf(&newvalue,newfmt,args)) {
 286                 syslog(LOG_ERR, "ldap: out of memory!");
 287                 return 0;
 288         }
 289         changed_something = vcard_set_props_iff_different(v,propname,1,&newvalue);
 290         va_end(args);
 291         free(newvalue);
 292         return changed_something;
 293 }
 294
 295
 296 /*
 297  * Learn LDAP attributes and stuff them into the vCard.
 298  * Returns nonzero if we changed anything.
 299  */
 300 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 301 {
 302         int changed_something = 0;
 303         LDAP *ldserver = NULL;
 304         int i;
 305         struct timeval tv;
 306         LDAPMessage *search_result = NULL;
 307         LDAPMessage *entry = NULL;
 308         char **givenName;
 309         char **sn;
 310         char **cn;
 311         char **initials;
 312         char **o;
 313         char **street;
 314         char **l;
 315         char **st;
 316         char **postalCode;
 317         char **telephoneNumber;
 318         char **mobile;
 319         char **homePhone;
 320         char **facsimileTelephoneNumber;
 321         char **mail;
 322         char **uid;
 323         char **homeDirectory;
 324         char **uidNumber;
 325         char **loginShell;
 326         char **gidNumber;
 327         char **c;
 328         char **title;
 329         char **uuid;
 330         char *attrs[] = { "*","+",NULL};
 331
 332         if (!ldap_dn) return(0);
 333         if (!v) return(0);
 334
 335         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 336                 return(0);
 337         }
 338
 339         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 340         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 341
 342         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 343         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 344         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 345         i = ldap_simple_bind_s(ldserver,
 346                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 347                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 348         );
 349         if (i != LDAP_SUCCESS) {
 350                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 351                 return(0);
 352         }
 353
 354         tv.tv_sec = 10;
 355         tv.tv_usec = 0;
 356
 357         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 358         (void) ldap_search_ext_s(
 359                 ldserver,                               // ld
 360                 ldap_dn,                                // base
 361                 LDAP_SCOPE_SUBTREE,                     // scope
 362                 NULL,                                   // filter
 363                 attrs,                                  // attrs (all attributes)
 364                 0,                                      // attrsonly (attrs + values)
 365                 NULL,                                   // serverctrls (none)
 366                 NULL,                                   // clientctrls (none)
 367                 &tv,                                    // timeout
 368                 1,                                      // sizelimit (1 result max)
 369                 &search_result                          // res
 370         );
 371
 372         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 373          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 374          */
 375         if (search_result == NULL) {
 376                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 377                 ldap_unbind(ldserver);
 378                 return(0);
 379         }
 380
 381         /* At this point we've got at least one result from our query.  If there are multiple
 382          * results, we still only look at the first one.
 383          */
 384         entry = ldap_first_entry(ldserver, search_result);
 385         if (entry) {
 386                 syslog(LOG_DEBUG, "ldap: search got user details for vcard.");
 387                 givenName=ldap_get_values(ldserver, search_result, "givenName");
 388                 sn=ldap_get_values(ldserver, search_result, "sn");
 389                 cn=ldap_get_values(ldserver, search_result, "cn");
 390                 initials=ldap_get_values(ldserver, search_result, "initials");
 391                 title=ldap_get_values(ldserver, search_result, "title");
 392                 o=ldap_get_values(ldserver, search_result, "o");
 393                 street=ldap_get_values(ldserver, search_result, "street");
 394                 l=ldap_get_values(ldserver, search_result, "l");
 395                 st=ldap_get_values(ldserver, search_result, "st");
 396                 postalCode=ldap_get_values(ldserver, search_result, "postalCode");
 397                 telephoneNumber=ldap_get_values(ldserver, search_result, "telephoneNumber");
 398                 mobile=ldap_get_values(ldserver, search_result, "mobile");
 399                 homePhone=ldap_get_values(ldserver, search_result, "homePhone");
 400                 facsimileTelephoneNumber=ldap_get_values(ldserver, search_result, "facsimileTelephoneNumber");
 401                 mail=ldap_get_values(ldserver, search_result, "mail");
 402                 uid=ldap_get_values(ldserver, search_result, "uid");
 403                 homeDirectory=ldap_get_values(ldserver, search_result, "homeDirectory");
 404                 uidNumber=ldap_get_values(ldserver, search_result, "uidNumber");
 405                 loginShell=ldap_get_values(ldserver, search_result, "loginShell");
 406                 gidNumber=ldap_get_values(ldserver, search_result, "gidNumber");
 407                 c=ldap_get_values(ldserver, search_result, "c");
 408                 uuid=ldap_get_values(ldserver, search_result, "entryUUID");
 409
 410                 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]);
 411                 if (telephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;work","%s",telephoneNumber[0]);
 412                 if (facsimileTelephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;fax","%s",facsimileTelephoneNumber[0]);
 413                 if (mobile) changed_something |= vcard_set_one_prop_iff_different(v,"tel;cell","%s",mobile[0]);
 414                 if (homePhone) changed_something |= vcard_set_one_prop_iff_different(v,"tel;home","%s",homePhone[0]);
 415                 if (givenName && sn) {
 416                         if (initials) {
 417                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s;%s",sn[0],givenName[0],initials[0]);
 418                         }
 419                         else {
 420                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s",sn[0],givenName[0]);
 421                         }
 422                 }
 423                 if (mail) {
 424                         changed_something |= vcard_set_props_iff_different(v,"email;internet",ldap_count_values(mail),mail);
 425                 }
 426                 if (uuid) changed_something |= vcard_set_one_prop_iff_different(v,"X-uuid","%s",uuid[0]);
 427                 if (o) changed_something |= vcard_set_one_prop_iff_different(v,"org","%s",o[0]);
 428                 if (cn) changed_something |= vcard_set_one_prop_iff_different(v,"fn","%s",cn[0]);
 429                 if (title) changed_something |= vcard_set_one_prop_iff_different(v,"title","%s",title[0]);
 430
 431                 if (givenName) ldap_value_free(givenName);
 432                 if (initials) ldap_value_free(initials);
 433                 if (sn) ldap_value_free(sn);
 434                 if (cn) ldap_value_free(cn);
 435                 if (o) ldap_value_free(o);
 436                 if (street) ldap_value_free(street);
 437                 if (l) ldap_value_free(l);
 438                 if (st) ldap_value_free(st);
 439                 if (postalCode) ldap_value_free(postalCode);
 440                 if (telephoneNumber) ldap_value_free(telephoneNumber);
 441                 if (mobile) ldap_value_free(mobile);
 442                 if (homePhone) ldap_value_free(homePhone);
 443                 if (facsimileTelephoneNumber) ldap_value_free(facsimileTelephoneNumber);
 444                 if (mail) ldap_value_free(mail);
 445                 if (uid) ldap_value_free(uid);
 446                 if (homeDirectory) ldap_value_free(homeDirectory);
 447                 if (uidNumber) ldap_value_free(uidNumber);
 448                 if (loginShell) ldap_value_free(loginShell);
 449                 if (gidNumber) ldap_value_free(gidNumber);
 450                 if (c) ldap_value_free(c);
 451                 if (title) ldap_value_free(title);
 452                 if (uuid) ldap_value_free(uuid);
 453         }
 454         /* free the results */
 455         ldap_msgfree(search_result);
 456
 457         /* unbind so we can go back in as the authenticating user */
 458         ldap_unbind(ldserver);
 459         return(changed_something);      /* tell the caller whether we made any changes */
 460 }
 461
 462
 463 /*
 464  * Extract a user's Internet email addresses from LDAP.
 465  * Returns zero if we got a valid set of addresses; nonzero for error.
 466  */
 467 int extract_email_addresses_from_ldap(char *ldap_dn, char *emailaddrs)
 468 {
 469         LDAP *ldserver = NULL;
 470         int i;
 471         struct timeval tv;
 472         LDAPMessage *search_result = NULL;
 473         LDAPMessage *entry = NULL;
 474         char **mail;
 475         char *attrs[] = { "*","+",NULL};
 476
 477         if (!ldap_dn) return(1);
 478         if (!emailaddrs) return(1);
 479
 480         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 481                 return(2);
 482         }
 483
 484         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 485         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 486
 487         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 488         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 489         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 490         i = ldap_simple_bind_s(ldserver,
 491                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 492                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 493         );
 494         if (i != LDAP_SUCCESS) {
 495                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 496                 return(3);
 497         }
 498
 499         tv.tv_sec = 10;
 500         tv.tv_usec = 0;
 501
 502         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 503         (void) ldap_search_ext_s(
 504                 ldserver,                               // ld
 505                 ldap_dn,                                // base
 506                 LDAP_SCOPE_SUBTREE,                     // scope
 507                 NULL,                                   // filter
 508                 attrs,                                  // attrs (all attributes)
 509                 0,                                      // attrsonly (attrs + values)
 510                 NULL,                                   // serverctrls (none)
 511                 NULL,                                   // clientctrls (none)
 512                 &tv,                                    // timeout
 513                 1,                                      // sizelimit (1 result max)
 514                 &search_result                          // res
 515         );
 516
 517         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 518          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 519          */
 520         if (search_result == NULL) {
 521                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 522                 ldap_unbind(ldserver);
 523                 return(4);
 524         }
 525
 526         /* At this point we've got at least one result from our query.  If there are multiple
 527          * results, we still only look at the first one.
 528          */
 529         emailaddrs[0] = 0;      /* clear out any previous results */
 530         entry = ldap_first_entry(ldserver, search_result);
 531         if (entry) {
 532                 syslog(LOG_DEBUG, "ldap: search got user details");
 533                 mail=ldap_get_values(ldserver, search_result, "mail");
 534
 535                 if (mail) {
 536                         int q;
 537                         for (q=0; q<ldap_count_values(mail); ++q) {
 538                                 if (IsDirectory(mail[q], 0)) {
 539                                         syslog(LOG_DEBUG, "\035FIXME YES DIRECTORY %s\033[0m", mail[q]);
 540                                         if ((strlen(emailaddrs) + strlen(mail[q]) + 2) > 512) {
 541                                                 syslog(LOG_ERR, "ldap: can't fit all email addresses into user record");
 542                                         }
 543                                         else {
 544                                                 if (!IsEmptyStr(emailaddrs)) {
 545                                                         strcat(emailaddrs, "|");
 546                                                 }
 547                                                 strcat(emailaddrs, mail[q]);
 548                                         }
 549                                 }
 550                         }
 551                 }
 552         }
 553
 554         /* free the results */
 555         ldap_msgfree(search_result);
 556
 557         /* unbind so we can go back in as the authenticating user */
 558         ldap_unbind(ldserver);
 559         return(0);
 560 }
 561
 562
 563 /*
 564  * Scan LDAP for users and populate Citadel's user database with everyone
 565  */
 566 void CtdlSynchronizeUsersFromLDAP(void)
 567 {
 568         LDAP *ldserver = NULL;
 569         int i;
 570         LDAPMessage *search_result = NULL;
 571         LDAPMessage *entry = NULL;
 572         char *user_dn = NULL;
 573         char searchstring[1024];
 574         struct timeval tv;
 575         char **values;
 576
 577         if ((CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP) && (CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP_AD)) {
 578                 return;         // not running LDAP
 579         }
 580
 581         syslog(LOG_INFO, "ldap: synchronizing Citadel user database from LDAP");
 582
 583         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 584                 return;
 585         }
 586
 587         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 588         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 589
 590         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 591         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 592         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 593         i = ldap_simple_bind_s(ldserver,
 594                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 595                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 596         );
 597         if (i != LDAP_SUCCESS) {
 598                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 599                 return;
 600         }
 601
 602         tv.tv_sec = 10;
 603         tv.tv_usec = 0;
 604
 605         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 606                         snprintf(searchstring, sizeof(searchstring), "(&(objectClass=user)(objectClass=person)(!(objectClass=computer)))");
 607         } else {
 608                         snprintf(searchstring, sizeof(searchstring), "(objectClass=inetOrgPerson)");
 609         }
 610
 611         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 612         (void) ldap_search_ext_s(
 613                 ldserver,                                       // ld
 614                 CtdlGetConfigStr("c_ldap_base_dn"),             // base
 615                 LDAP_SCOPE_SUBTREE,                             // scope
 616                 searchstring,                                   // filter
 617                 NULL,                                           // attrs (all attributes)
 618                 0,                                              // attrsonly (attrs + values)
 619                 NULL,                                           // serverctrls (none)
 620                 NULL,                                           // clientctrls (none)
 621                 &tv,                                            // timeout
 622                 INT_MAX,                                        // sizelimit (max)
 623                 &search_result                                  // result
 624         );
 625
 626         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 627          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 628          */
 629         if (search_result == NULL) {
 630                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 631                 ldap_unbind(ldserver);
 632                 return;
 633         }
 634
 635         syslog(LOG_DEBUG, "ldap: %d entries returned", ldap_count_entries(ldserver, search_result));
 636         entry = ldap_first_entry(ldserver, search_result);
 637         while (entry) {
 638
 639                 user_dn = ldap_get_dn(ldserver, entry);
 640                 if (user_dn) {
 641                         syslog(LOG_DEBUG, "ldap: found %s", user_dn);
 642
 643                         int fullname_size = 256;
 644                         char fullname[256] = { 0 } ;
 645                         uid_t uid = (-1);
 646
 647                         derive_fullname_from_ldap_result(fullname, fullname_size, ldserver, entry);
 648
 649                         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 650                                 values = ldap_get_values(ldserver, entry, "objectGUID");        // AD schema: uid hashed from objectGUID
 651                                 if (values) {
 652                                         if (values[0]) {
 653                                                 uid = abs(HashLittle(values[0], strlen(values[0])));
 654                                         }
 655                                         ldap_value_free(values);
 656                                 }
 657                         }
 658                         else {
 659                                 values = ldap_get_values(ldserver, entry, "uidNumber");         // POSIX schema: uid = uidNumber
 660                                 if (values) {
 661                                         if (values[0]) {
 662                                                 uid = atoi(values[0]);
 663                                         }
 664                                         ldap_value_free(values);
 665                                 }
 666                         }
 667
 668                         syslog(LOG_DEBUG, "\033[33mldap: display name: <%s> , uid = <%d>\033[0m", fullname, uid);
 669
 670                         // FIXME now create or update the user
 671
 672
 673                 }
 674
 675                 entry = ldap_next_entry(ldserver, entry);
 676         }
 677
 678         /* free the results */
 679         ldap_msgfree(search_result);
 680
 681         /* unbind so we can go back in as the authenticating user */
 682         ldap_unbind(ldserver);
 683 }
 684
 685 #endif /* HAVE_LDAP */