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