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 /* begin - centralize this */
 145                 if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 146                         values = ldap_get_values(ldserver, search_result, "displayName");
 147                         if (values) {
 148                                 if (values[0]) {
 149                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 150                                         syslog(LOG_DEBUG, "ldap: displayName = %s", values[0]);
 151                                 }
 152                                 ldap_value_free(values);
 153                         }
 154                 }
 155                 else {
 156                         values = ldap_get_values(ldserver, search_result, "cn");
 157                         if (values) {
 158                                 if (values[0]) {
 159                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 160                                         syslog(LOG_DEBUG, "ldap: cn = %s", values[0]);
 161                                 }
 162                                 ldap_value_free(values);
 163                         }
 164                 }
 165 /* end - centralize this */
 166
 167                 /* If we know the username is the CN/displayName, we already set the uid*/
 168                 if (lookup_based_on_username==0) {
 169                         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 170                                 values = ldap_get_values(ldserver, search_result, "objectGUID");
 171                                 if (values) {
 172                                         if (values[0]) {
 173                                                 if (uid != NULL) {
 174                                                         *uid = abs(HashLittle(values[0], strlen(values[0])));
 175                                                         syslog(LOG_DEBUG, "ldap: uid hashed from objectGUID = %d", *uid);
 176                                                 }
 177                                         }
 178                                         ldap_value_free(values);
 179                                 }
 180                         }
 181                         else {
 182                                 values = ldap_get_values(ldserver, search_result, "uidNumber");
 183                                 if (values) {
 184                                         if (values[0]) {
 185                                                 syslog(LOG_DEBUG, "ldap: uidNumber = %s", values[0]);
 186                                                 if (uid != NULL) {
 187                                                         *uid = atoi(values[0]);
 188                                                 }
 189                                         }
 190                                         ldap_value_free(values);
 191                                 }
 192                         }
 193                 }
 194
 195         }
 196
 197         /* free the results */
 198         ldap_msgfree(search_result);
 199
 200         /* unbind so we can go back in as the authenticating user */
 201         ldap_unbind(ldserver);
 202
 203         if (!user_dn) {
 204                 syslog(LOG_DEBUG, "ldap: No such user was found.");
 205                 return(4);
 206         }
 207
 208         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 209         ldap_memfree(user_dn);
 210         return(0);
 211 }
 212
 213
 214 int CtdlTryPasswordLDAP(char *user_dn, const char *password)
 215 {
 216         LDAP *ldserver = NULL;
 217         int i = (-1);
 218
 219         if (IsEmptyStr(password)) {
 220                 syslog(LOG_DEBUG, "ldap: empty passwords are not permitted");
 221                 return(1);
 222         }
 223
 224         syslog(LOG_DEBUG, "ldap: trying to bind as %s", user_dn);
 225         i = ctdl_ldap_initialize(&ldserver);
 226         if (i == LDAP_SUCCESS) {
 227                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 228                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 229                 if (i == LDAP_SUCCESS) {
 230                         syslog(LOG_DEBUG, "ldap: bind succeeded");
 231                 }
 232                 else {
 233                         syslog(LOG_DEBUG, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 234                 }
 235                 ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 236                 ldap_unbind(ldserver);
 237         }
 238
 239         if (i == LDAP_SUCCESS) {
 240                 return(0);
 241         }
 242
 243         return(1);
 244 }
 245
 246
 247 //return !0 iff property changed.
 248 int vcard_set_props_iff_different(struct vCard *v,char *propname,int numvals, char **vals) {
 249         int i;
 250         char *oldval = "";
 251         for(i=0;i<numvals;i++) {
 252           oldval = vcard_get_prop(v,propname,0,i,0);
 253           if (oldval == NULL) break;
 254           if (strcmp(vals[i],oldval)) break;
 255         }
 256         if (i!=numvals) {
 257                 syslog(LOG_DEBUG, "ldap: vcard property %s, element %d of %d changed from %s to %s\n", propname, i, numvals, oldval, vals[i]);
 258                 for(i=0;i<numvals;i++) vcard_set_prop(v,propname,vals[i],(i==0) ? 0 : 1);
 259                 return 1;
 260         }
 261         return 0;
 262 }
 263
 264
 265 //return !0 iff property changed.
 266 int vcard_set_one_prop_iff_different(struct vCard *v,char *propname, char *newfmt, ...) {
 267         va_list args;
 268         char *newvalue;
 269         int changed_something;
 270         va_start(args,newfmt);
 271         if (-1==vasprintf(&newvalue,newfmt,args)) {
 272                 syslog(LOG_ERR, "ldap: out of memory!");
 273                 return 0;
 274         }
 275         changed_something = vcard_set_props_iff_different(v,propname,1,&newvalue);
 276         va_end(args);
 277         free(newvalue);
 278         return changed_something;
 279 }
 280
 281
 282 /*
 283  * Learn LDAP attributes and stuff them into the vCard.
 284  * Returns nonzero if we changed anything.
 285  */
 286 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 287 {
 288         int changed_something = 0;
 289         LDAP *ldserver = NULL;
 290         int i;
 291         struct timeval tv;
 292         LDAPMessage *search_result = NULL;
 293         LDAPMessage *entry = NULL;
 294         char **givenName;
 295         char **sn;
 296         char **cn;
 297         char **initials;
 298         char **o;
 299         char **street;
 300         char **l;
 301         char **st;
 302         char **postalCode;
 303         char **telephoneNumber;
 304         char **mobile;
 305         char **homePhone;
 306         char **facsimileTelephoneNumber;
 307         char **mail;
 308         char **uid;
 309         char **homeDirectory;
 310         char **uidNumber;
 311         char **loginShell;
 312         char **gidNumber;
 313         char **c;
 314         char **title;
 315         char **uuid;
 316         char *attrs[] = { "*","+",NULL};
 317
 318         if (!ldap_dn) return(0);
 319         if (!v) return(0);
 320
 321         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 322                 return(0);
 323         }
 324
 325         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 326         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 327
 328         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 329         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 330         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 331         i = ldap_simple_bind_s(ldserver,
 332                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 333                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 334         );
 335         if (i != LDAP_SUCCESS) {
 336                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 337                 return(0);
 338         }
 339
 340         tv.tv_sec = 10;
 341         tv.tv_usec = 0;
 342
 343         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 344         (void) ldap_search_ext_s(
 345                 ldserver,                               // ld
 346                 ldap_dn,                                // base
 347                 LDAP_SCOPE_SUBTREE,                     // scope
 348                 NULL,                                   // filter
 349                 attrs,                                  // attrs (all attributes)
 350                 0,                                      // attrsonly (attrs + values)
 351                 NULL,                                   // serverctrls (none)
 352                 NULL,                                   // clientctrls (none)
 353                 &tv,                                    // timeout
 354                 1,                                      // sizelimit (1 result max)
 355                 &search_result                          // res
 356         );
 357
 358         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 359          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 360          */
 361         if (search_result == NULL) {
 362                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 363                 ldap_unbind(ldserver);
 364                 return(0);
 365         }
 366
 367         /* At this point we've got at least one result from our query.  If there are multiple
 368          * results, we still only look at the first one.
 369          */
 370         entry = ldap_first_entry(ldserver, search_result);
 371         if (entry) {
 372                 syslog(LOG_DEBUG, "ldap: search got user details for vcard.");
 373                 givenName=ldap_get_values(ldserver, search_result, "givenName");
 374                 sn=ldap_get_values(ldserver, search_result, "sn");
 375                 cn=ldap_get_values(ldserver, search_result, "cn");
 376                 initials=ldap_get_values(ldserver, search_result, "initials");
 377                 title=ldap_get_values(ldserver, search_result, "title");
 378                 o=ldap_get_values(ldserver, search_result, "o");
 379                 street=ldap_get_values(ldserver, search_result, "street");
 380                 l=ldap_get_values(ldserver, search_result, "l");
 381                 st=ldap_get_values(ldserver, search_result, "st");
 382                 postalCode=ldap_get_values(ldserver, search_result, "postalCode");
 383                 telephoneNumber=ldap_get_values(ldserver, search_result, "telephoneNumber");
 384                 mobile=ldap_get_values(ldserver, search_result, "mobile");
 385                 homePhone=ldap_get_values(ldserver, search_result, "homePhone");
 386                 facsimileTelephoneNumber=ldap_get_values(ldserver, search_result, "facsimileTelephoneNumber");
 387                 mail=ldap_get_values(ldserver, search_result, "mail");
 388                 uid=ldap_get_values(ldserver, search_result, "uid");
 389                 homeDirectory=ldap_get_values(ldserver, search_result, "homeDirectory");
 390                 uidNumber=ldap_get_values(ldserver, search_result, "uidNumber");
 391                 loginShell=ldap_get_values(ldserver, search_result, "loginShell");
 392                 gidNumber=ldap_get_values(ldserver, search_result, "gidNumber");
 393                 c=ldap_get_values(ldserver, search_result, "c");
 394                 uuid=ldap_get_values(ldserver, search_result, "entryUUID");
 395
 396                 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]);
 397                 if (telephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;work","%s",telephoneNumber[0]);
 398                 if (facsimileTelephoneNumber) changed_something |= vcard_set_one_prop_iff_different(v,"tel;fax","%s",facsimileTelephoneNumber[0]);
 399                 if (mobile) changed_something |= vcard_set_one_prop_iff_different(v,"tel;cell","%s",mobile[0]);
 400                 if (homePhone) changed_something |= vcard_set_one_prop_iff_different(v,"tel;home","%s",homePhone[0]);
 401                 if (givenName && sn) {
 402                         if (initials) {
 403                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s;%s",sn[0],givenName[0],initials[0]);
 404                         }
 405                         else {
 406                                 changed_something |= vcard_set_one_prop_iff_different(v,"n","%s;%s",sn[0],givenName[0]);
 407                         }
 408                 }
 409                 if (mail) {
 410                         changed_something |= vcard_set_props_iff_different(v,"email;internet",ldap_count_values(mail),mail);
 411                 }
 412                 if (uuid) changed_something |= vcard_set_one_prop_iff_different(v,"X-uuid","%s",uuid[0]);
 413                 if (o) changed_something |= vcard_set_one_prop_iff_different(v,"org","%s",o[0]);
 414                 if (cn) changed_something |= vcard_set_one_prop_iff_different(v,"fn","%s",cn[0]);
 415                 if (title) changed_something |= vcard_set_one_prop_iff_different(v,"title","%s",title[0]);
 416
 417                 if (givenName) ldap_value_free(givenName);
 418                 if (initials) ldap_value_free(initials);
 419                 if (sn) ldap_value_free(sn);
 420                 if (cn) ldap_value_free(cn);
 421                 if (o) ldap_value_free(o);
 422                 if (street) ldap_value_free(street);
 423                 if (l) ldap_value_free(l);
 424                 if (st) ldap_value_free(st);
 425                 if (postalCode) ldap_value_free(postalCode);
 426                 if (telephoneNumber) ldap_value_free(telephoneNumber);
 427                 if (mobile) ldap_value_free(mobile);
 428                 if (homePhone) ldap_value_free(homePhone);
 429                 if (facsimileTelephoneNumber) ldap_value_free(facsimileTelephoneNumber);
 430                 if (mail) ldap_value_free(mail);
 431                 if (uid) ldap_value_free(uid);
 432                 if (homeDirectory) ldap_value_free(homeDirectory);
 433                 if (uidNumber) ldap_value_free(uidNumber);
 434                 if (loginShell) ldap_value_free(loginShell);
 435                 if (gidNumber) ldap_value_free(gidNumber);
 436                 if (c) ldap_value_free(c);
 437                 if (title) ldap_value_free(title);
 438                 if (uuid) ldap_value_free(uuid);
 439         }
 440         /* free the results */
 441         ldap_msgfree(search_result);
 442
 443         /* unbind so we can go back in as the authenticating user */
 444         ldap_unbind(ldserver);
 445         return(changed_something);      /* tell the caller whether we made any changes */
 446 }
 447
 448
 449 /*
 450  * Extract a user's Internet email addresses from LDAP.
 451  * Returns zero if we got a valid set of addresses; nonzero for error.
 452  */
 453 int extract_email_addresses_from_ldap(char *ldap_dn, char *emailaddrs)
 454 {
 455         LDAP *ldserver = NULL;
 456         int i;
 457         struct timeval tv;
 458         LDAPMessage *search_result = NULL;
 459         LDAPMessage *entry = NULL;
 460         char **mail;
 461         char *attrs[] = { "*","+",NULL};
 462
 463         if (!ldap_dn) return(1);
 464         if (!emailaddrs) return(1);
 465
 466         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 467                 return(2);
 468         }
 469
 470         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 471         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 472
 473         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 474         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 475         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 476         i = ldap_simple_bind_s(ldserver,
 477                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 478                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 479         );
 480         if (i != LDAP_SUCCESS) {
 481                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 482                 return(3);
 483         }
 484
 485         tv.tv_sec = 10;
 486         tv.tv_usec = 0;
 487
 488         syslog(LOG_DEBUG, "ldap: search: %s", ldap_dn);
 489         (void) ldap_search_ext_s(
 490                 ldserver,                               // ld
 491                 ldap_dn,                                // base
 492                 LDAP_SCOPE_SUBTREE,                     // scope
 493                 NULL,                                   // filter
 494                 attrs,                                  // attrs (all attributes)
 495                 0,                                      // attrsonly (attrs + values)
 496                 NULL,                                   // serverctrls (none)
 497                 NULL,                                   // clientctrls (none)
 498                 &tv,                                    // timeout
 499                 1,                                      // sizelimit (1 result max)
 500                 &search_result                          // res
 501         );
 502
 503         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 504          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 505          */
 506         if (search_result == NULL) {
 507                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 508                 ldap_unbind(ldserver);
 509                 return(4);
 510         }
 511
 512         /* At this point we've got at least one result from our query.  If there are multiple
 513          * results, we still only look at the first one.
 514          */
 515         emailaddrs[0] = 0;      /* clear out any previous results */
 516         entry = ldap_first_entry(ldserver, search_result);
 517         if (entry) {
 518                 syslog(LOG_DEBUG, "ldap: search got user details");
 519                 mail=ldap_get_values(ldserver, search_result, "mail");
 520
 521                 if (mail) {
 522                         int q;
 523                         for (q=0; q<ldap_count_values(mail); ++q) {
 524                                 if (IsDirectory(mail[q], 0)) {
 525                                         syslog(LOG_DEBUG, "\035FIXME YES DIRECTORY %s\033[0m", mail[q]);
 526                                         if ((strlen(emailaddrs) + strlen(mail[q]) + 2) > 512) {
 527                                                 syslog(LOG_ERR, "ldap: can't fit all email addresses into user record");
 528                                         }
 529                                         else {
 530                                                 if (!IsEmptyStr(emailaddrs)) {
 531                                                         strcat(emailaddrs, "|");
 532                                                 }
 533                                                 strcat(emailaddrs, mail[q]);
 534                                         }
 535                                 }
 536                         }
 537                 }
 538         }
 539
 540         /* free the results */
 541         ldap_msgfree(search_result);
 542
 543         /* unbind so we can go back in as the authenticating user */
 544         ldap_unbind(ldserver);
 545         return(0);
 546 }
 547
 548
 549 /*
 550  * Scan LDAP for users and populate Citadel's user database with everyone
 551  */
 552 void CtdlPopulateUsersFromLDAP(void)
 553 {
 554         LDAP *ldserver = NULL;
 555         int i;
 556         LDAPMessage *search_result = NULL;
 557         LDAPMessage *entry = NULL;
 558         char *user_dn = NULL;
 559         char searchstring[1024];
 560         struct timeval tv;
 561         char **values;
 562
 563         if ((CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP) && (CtdlGetConfigInt("c_auth_mode") != AUTHMODE_LDAP_AD)) {
 564                 return;         // not running LDAP
 565         }
 566
 567         syslog(LOG_INFO, "ldap: populating Citadel user database from LDAP");
 568
 569         if (ctdl_ldap_initialize(&ldserver) != LDAP_SUCCESS) {
 570                 return;
 571         }
 572
 573         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 574         ldap_set_option(ldserver, LDAP_OPT_REFERRALS, (void *)LDAP_OPT_OFF);
 575
 576         striplt(CtdlGetConfigStr("c_ldap_bind_dn"));
 577         striplt(CtdlGetConfigStr("c_ldap_bind_pw"));
 578         syslog(LOG_DEBUG, "ldap: bind DN: %s", CtdlGetConfigStr("c_ldap_bind_dn"));
 579         i = ldap_simple_bind_s(ldserver,
 580                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_dn")) ? CtdlGetConfigStr("c_ldap_bind_dn") : NULL),
 581                 (!IsEmptyStr(CtdlGetConfigStr("c_ldap_bind_pw")) ? CtdlGetConfigStr("c_ldap_bind_pw") : NULL)
 582         );
 583         if (i != LDAP_SUCCESS) {
 584                 syslog(LOG_ERR, "ldap: Cannot bind: %s (%d)", ldap_err2string(i), i);
 585                 return;
 586         }
 587
 588         tv.tv_sec = 10;
 589         tv.tv_usec = 0;
 590
 591         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 592                         snprintf(searchstring, sizeof(searchstring), "(&(objectClass=user)(objectClass=person)(!(objectClass=computer)))");
 593         } else {
 594                         snprintf(searchstring, sizeof(searchstring), "(objectClass=inetOrgPerson)");
 595         }
 596
 597         syslog(LOG_DEBUG, "ldap: search: %s", searchstring);
 598         (void) ldap_search_ext_s(
 599                 ldserver,                                       // ld
 600                 CtdlGetConfigStr("c_ldap_base_dn"),             // base
 601                 LDAP_SCOPE_SUBTREE,                             // scope
 602                 searchstring,                                   // filter
 603                 NULL,                                           // attrs (all attributes)
 604                 0,                                              // attrsonly (attrs + values)
 605                 NULL,                                           // serverctrls (none)
 606                 NULL,                                           // clientctrls (none)
 607                 &tv,                                            // timeout
 608                 INT_MAX,                                        // sizelimit (max)
 609                 &search_result                                  // result
 610         );
 611
 612         /* Ignore the return value of ldap_search_ext_s().  Sometimes it returns an error even when
 613          * the search succeeds.  Instead, we check to see whether search_result is still NULL.
 614          */
 615         if (search_result == NULL) {
 616                 syslog(LOG_DEBUG, "ldap: zero search results were returned");
 617                 ldap_unbind(ldserver);
 618                 return;
 619         }
 620
 621         syslog(LOG_DEBUG, "ldap: %d entries returned", ldap_count_entries(ldserver, search_result));
 622         entry = ldap_first_entry(ldserver, search_result);
 623         while (entry) {
 624
 625                 user_dn = ldap_get_dn(ldserver, entry);
 626                 if (user_dn) {
 627                         syslog(LOG_DEBUG, "ldap: found %s", user_dn);
 628
 629                         // FIXME now create or update the user begin
 630                         int fullname_size = 256;
 631                         char fullname[256] = { 0 } ;
 632                         uid_t uid = (-1);
 633
 634                         if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_LDAP_AD) {
 635                                 values = ldap_get_values(ldserver, entry, "displayName");       // AD: fullname = displayName
 636                                 if (values) {
 637                                         if (values[0]) {
 638                                                 safestrncpy(fullname, values[0], fullname_size);
 639                                         }
 640                                         ldap_value_free(values);
 641                                 }
 642                                 values = ldap_get_values(ldserver, entry, "objectGUID");        // AD: uid hashed from objectGUID
 643                                 if (values) {
 644                                         if (values[0]) {
 645                                                 uid = abs(HashLittle(values[0], strlen(values[0])));
 646                                         }
 647                                         ldap_value_free(values);
 648                                 }
 649                         }
 650                         else {
 651                                 values = ldap_get_values(ldserver, entry, "cn");                // non-AD: fullname = cn
 652                                 if (values) {
 653                                         if (values[0]) {
 654                                                 safestrncpy(fullname, values[0], fullname_size);
 655                                         }
 656                                         ldap_value_free(values);
 657                                 }
 658                                 values = ldap_get_values(ldserver, entry, "uidNumber");         // non-AD: uid = uidNumber
 659                                 if (values) {
 660                                         if (values[0]) {
 661                                                 uid = atoi(values[0]);
 662                                         }
 663                                         ldap_value_free(values);
 664                                 }
 665                         }
 666
 667                         syslog(LOG_DEBUG, "\033[33mldap: display name: <%s> , uid = <%d>\033[0m", fullname, uid);
 668
 669
 670                         // FIXME now create or update the user end
 671
 672
 673
 674
 675
 676                 }
 677
 678                 entry = ldap_next_entry(ldserver, entry);
 679         }
 680
 681         /* free the results */
 682         ldap_msgfree(search_result);
 683
 684         /* unbind so we can go back in as the authenticating user */
 685         ldap_unbind(ldserver);
 686 }
 687
 688 #endif /* HAVE_LDAP */