source/lib/smbldap.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    LDAP protocol helper functions for SAMBA
   4    Copyright (C) Jean François Micouleau        1998
   5    Copyright (C) Gerald Carter                  2001-2003
   6    Copyright (C) Shahms King                    2001
   7    Copyright (C) Andrew Bartlett                2002-2003
   8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 */
  25
  26 #include "includes.h"
  27 #include "smbldap.h"
  28
  29 #ifndef LDAP_OPT_SUCCESS
  30 #define LDAP_OPT_SUCCESS 0
  31 #endif
  32
  33 /* Try not to hit the up or down server forever */
  34
  35 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  36 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  37
  38 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  39
  40
  41 /* attributes used by Samba 2.2 */
  42
  43 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  44         { LDAP_ATTR_UID,                "uid"           },
  45         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  46         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  47         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  48         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  49         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  50         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  51         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  52         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  53         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  54         { LDAP_ATTR_CN,                 "cn"            },
  55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  57         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  60         { LDAP_ATTR_DESC,               "description"   },
  61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  62         { LDAP_ATTR_USER_RID,           "rid"           },
  63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  64         { LDAP_ATTR_LMPW,               "lmPassword"    },
  65         { LDAP_ATTR_NTPW,               "ntPassword"    },
  66         { LDAP_ATTR_DOMAIN,             "domain"        },
  67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  69         { LDAP_ATTR_LIST_END,           NULL            }
  70 };
  71
  72 /* attributes used by Samba 3.0's sambaSamAccount */
  73
  74 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  75         { LDAP_ATTR_UID,                "uid"                   },
  76         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  77         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  78         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
  79         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
  80         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
  81         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
  82         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
  83         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
  84         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
  85         { LDAP_ATTR_CN,                 "cn"                    },
  86         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
  87         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
  88         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
  89         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
  90         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
  91         { LDAP_ATTR_DESC,               "description"           },
  92         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
  93         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
  94         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
  95         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
  96         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
  97         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
  98         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
  99         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 100         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 101         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 102         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 103         { LDAP_ATTR_LIST_END,           NULL                    }
 104 };
 105
 106 /* attributes used for allocating RIDs */
 107
 108 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 109         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 110         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 111         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 112         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 113         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 114         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 115         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 116         { LDAP_ATTR_LIST_END,           NULL                    },
 117 };
 118
 119 /* Samba 3.0 group mapping attributes */
 120
 121 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 122         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 123         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 124         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 125         { LDAP_ATTR_DESC,               "description"           },
 126         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 127         { LDAP_ATTR_CN,                 "cn"                    },
 128         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 129         { LDAP_ATTR_LIST_END,           NULL                    }
 130 };
 131
 132 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 133         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 134         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 135         { LDAP_ATTR_DESC,               "description"           },
 136         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 137         { LDAP_ATTR_LIST_END,           NULL                    }
 138 };
 139
 140 /* idmap_ldap sambaUnixIdPool */
 141
 142 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 143         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 144         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 145         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 146         { LDAP_ATTR_LIST_END,           NULL                    }
 147 };
 148
 149 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 150         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 151         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 152         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 153         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 154         { LDAP_ATTR_LIST_END,           NULL                    }
 155 };
 156
 157 /**********************************************************************
 158  perform a simple table lookup and return the attribute name
 159  **********************************************************************/
 160
 161  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 162 {
 163         int i = 0;
 164
 165         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 166                 if ( table[i].attrib == key )
 167                         return table[i].name;
 168                 i++;
 169         }
 170
 171         return NULL;
 172 }
 173
 174
 175 /**********************************************************************
 176  Return the list of attribute names from a mapping table
 177  **********************************************************************/
 178
 179  char** get_attr_list( ATTRIB_MAP_ENTRY table[] )
 180 {
 181         char **names;
 182         int i = 0;
 183
 184         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 185                 i++;
 186         i++;
 187
 188         names = (char**)malloc( sizeof(char*)*i );
 189         if ( !names ) {
 190                 DEBUG(0,("get_attr_list: out of memory\n"));
 191                 return NULL;
 192         }
 193
 194         i = 0;
 195         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 196                 names[i] = strdup( table[i].name );
 197                 i++;
 198         }
 199         names[i] = NULL;
 200
 201         return names;
 202 }
 203
 204 /*********************************************************************
 205  Cleanup
 206  ********************************************************************/
 207
 208  void free_attr_list( char **list )
 209 {
 210         int i = 0;
 211
 212         if ( !list )
 213                 return;
 214
 215         while ( list[i] ) {
 216                 SAFE_FREE( list[i] );
 217                 i+=1;
 218         }
 219
 220         SAFE_FREE( list );
 221 }
 222
 223 /*******************************************************************
 224  find the ldap password
 225 ******************************************************************/
 226 static BOOL fetch_ldap_pw(char **dn, char** pw)
 227 {
 228         char *key = NULL;
 229         size_t size;
 230
 231         *dn = smb_xstrdup(lp_ldap_admin_dn());
 232
 233         if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
 234                 SAFE_FREE(*dn);
 235                 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
 236         }
 237
 238         *pw=secrets_fetch(key, &size);
 239         SAFE_FREE(key);
 240
 241         if (!size) {
 242                 /* Upgrade 2.2 style entry */
 243                 char *p;
 244                 char* old_style_key = strdup(*dn);
 245                 char *data;
 246                 fstring old_style_pw;
 247
 248                 if (!old_style_key) {
 249                         DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
 250                         return False;
 251                 }
 252
 253                 for (p=old_style_key; *p; p++)
 254                         if (*p == ',') *p = '/';
 255
 256                 data=secrets_fetch(old_style_key, &size);
 257                 if (!size && size < sizeof(old_style_pw)) {
 258                         DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
 259                         SAFE_FREE(old_style_key);
 260                         SAFE_FREE(*dn);
 261                         return False;
 262                 }
 263
 264                 size = MIN(size, sizeof(fstring)-1);
 265                 strncpy(old_style_pw, data, size);
 266                 old_style_pw[size] = 0;
 267
 268                 SAFE_FREE(data);
 269
 270                 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
 271                         DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
 272                         SAFE_FREE(old_style_key);
 273                         SAFE_FREE(*dn);
 274                         return False;
 275                 }
 276                 if (!secrets_delete(old_style_key)) {
 277                         DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
 278                 }
 279
 280                 SAFE_FREE(old_style_key);
 281
 282                 *pw = smb_xstrdup(old_style_pw);
 283         }
 284
 285         return True;
 286 }
 287
 288 /*******************************************************************
 289  Search an attribute and return the first value found.
 290 ******************************************************************/
 291
 292  BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 293                                     const char *attribute, char *value,
 294                                     int max_len)
 295 {
 296         char **values;
 297
 298         if ( !attribute )
 299                 return False;
 300
 301         value[0] = '\0';
 302
 303         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 304                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 305
 306                 return False;
 307         }
 308
 309         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len) == (size_t)-1) {
 310                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 311                           attribute, values[0]));
 312                 ldap_value_free(values);
 313                 return False;
 314         }
 315
 316         ldap_value_free(values);
 317 #ifdef DEBUG_PASSWORDS
 318         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 319 #endif
 320         return True;
 321 }
 322
 323  BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
 324                                   const char *attribute, pstring value)
 325 {
 326         return smbldap_get_single_attribute(ldap_struct, entry,
 327                                             attribute, value,
 328                                             sizeof(pstring));
 329 }
 330
 331 /************************************************************************
 332  Routine to manage the LDAPMod structure array
 333  manage memory used by the array, by each struct, and values
 334  ***********************************************************************/
 335
 336  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 337 {
 338         LDAPMod **mods;
 339         int i;
 340         int j;
 341
 342         mods = *modlist;
 343
 344         /* sanity checks on the mod values */
 345
 346         if (attribute == NULL || *attribute == '\0')
 347                 return;
 348 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 349            left here so other so re-add similar code   --jerry */
 350         if (value == NULL || *value == '\0')
 351                 return;
 352 #endif
 353
 354         if (mods == NULL)
 355         {
 356                 mods = (LDAPMod **) malloc(sizeof(LDAPMod *));
 357                 if (mods == NULL)
 358                 {
 359                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 360                         return;
 361                 }
 362                 mods[0] = NULL;
 363         }
 364
 365         for (i = 0; mods[i] != NULL; ++i) {
 366                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 367                         break;
 368         }
 369
 370         if (mods[i] == NULL)
 371         {
 372                 mods = (LDAPMod **) Realloc (mods, (i + 2) * sizeof (LDAPMod *));
 373                 if (mods == NULL)
 374                 {
 375                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 376                         return;
 377                 }
 378                 mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
 379                 if (mods[i] == NULL)
 380                 {
 381                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 382                         return;
 383                 }
 384                 mods[i]->mod_op = modop;
 385                 mods[i]->mod_values = NULL;
 386                 mods[i]->mod_type = strdup(attribute);
 387                 mods[i + 1] = NULL;
 388         }
 389
 390         if (value != NULL)
 391         {
 392                 char *utf8_value = NULL;
 393
 394                 j = 0;
 395                 if (mods[i]->mod_values != NULL) {
 396                         for (; mods[i]->mod_values[j] != NULL; j++);
 397                 }
 398                 mods[i]->mod_values = (char **)Realloc(mods[i]->mod_values,
 399                                                (j + 2) * sizeof (char *));
 400
 401                 if (mods[i]->mod_values == NULL) {
 402                         DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
 403                         return;
 404                 }
 405
 406                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
 407                         DEBUG (0, ("make_a_mod: String conversion failure!\n"));
 408                         return;
 409                 }
 410
 411                 mods[i]->mod_values[j] = utf8_value;
 412
 413                 mods[i]->mod_values[j + 1] = NULL;
 414         }
 415         *modlist = mods;
 416 }
 417
 418 /**********************************************************************
 419   Set attribute to newval in LDAP, regardless of what value the
 420   attribute had in LDAP before.
 421 *********************************************************************/
 422
 423  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 424                       LDAPMod ***mods,
 425                       const char *attribute, const char *newval)
 426 {
 427         char oldval[2048]; /* current largest allowed value is mungeddial */
 428         BOOL existed;
 429
 430         if (existing != NULL) {
 431                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 432         } else {
 433                 existed = False;
 434                 *oldval = '\0';
 435         }
 436
 437         /* all of our string attributes are case insensitive */
 438
 439         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 440
 441                 /* Believe it or not, but LDAP will deny a delete and
 442                    an add at the same time if the values are the
 443                    same... */
 444                 return;
 445         }
 446
 447         if (existed) {
 448                 /* There has been no value before, so don't delete it.
 449                  * Here's a possible race: We might end up with
 450                  * duplicate attributes */
 451                 /* By deleting exactly the value we found in the entry this
 452                  * should be race-free in the sense that the LDAP-Server will
 453                  * deny the complete operation if somebody changed the
 454                  * attribute behind our back. */
 455                 /* This will also allow modifying single valued attributes
 456                  * in Novell NDS. In NDS you have to first remove attribute and then
 457                  * you could add new value */
 458
 459                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 460         }
 461
 462         /* Regardless of the real operation (add or modify)
 463            we add the new value here. We rely on deleting
 464            the old value, should it exist. */
 465
 466         if ((newval != NULL) && (strlen(newval) > 0)) {
 467                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 468         }
 469 }
 470
 471 /**********************************************************************
 472  Some varients of the LDAP rebind code do not pass in the third 'arg'
 473  pointer to a void*, so we try and work around it by assuming that the
 474  value of the 'LDAP *' pointer is the same as the one we had passed in
 475  **********************************************************************/
 476
 477 struct smbldap_state_lookup {
 478         LDAP *ld;
 479         struct smbldap_state *smbldap_state;
 480         struct smbldap_state_lookup *prev, *next;
 481 };
 482
 483 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 484
 485 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 486 {
 487         struct smbldap_state_lookup *t;
 488
 489         for (t = smbldap_state_lookup_list; t; t = t->next) {
 490                 if (t->ld == ld) {
 491                         return t->smbldap_state;
 492                 }
 493         }
 494         return NULL;
 495 }
 496
 497 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 498 {
 499         struct smbldap_state_lookup *t;
 500
 501         for (t = smbldap_state_lookup_list; t; t = t->next) {
 502                 if (t->smbldap_state == smbldap_state) {
 503                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 504                         SAFE_FREE(t);
 505                         return;
 506                 }
 507         }
 508 }
 509
 510 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 511 {
 512         struct smbldap_state *tmp_ldap_state;
 513         struct smbldap_state_lookup *t;
 514         struct smbldap_state_lookup *tmp;
 515
 516         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 517                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 518                 return;
 519         }
 520
 521         t = smb_xmalloc(sizeof(*t));
 522         ZERO_STRUCTP(t);
 523
 524         DLIST_ADD_END(smbldap_state_lookup_list, t, tmp);
 525         t->ld = ld;
 526         t->smbldap_state = smbldap_state;
 527 }
 528
 529 /*******************************************************************
 530  open a connection to the ldap server.
 531 ******************************************************************/
 532 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 533
 534 {
 535         int rc = LDAP_SUCCESS;
 536         int version;
 537         BOOL ldap_v3 = False;
 538         LDAP **ldap_struct = &ldap_state->ldap_struct;
 539
 540 #ifdef HAVE_LDAP_INITIALIZE
 541         DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri));
 542
 543         if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) {
 544                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 545                 return rc;
 546         }
 547 #else
 548
 549         /* Parse the string manually */
 550
 551         {
 552                 int port = 0;
 553                 fstring protocol;
 554                 fstring host;
 555                 const char *p = ldap_state->uri;
 556                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 557
 558                 /* skip leading "URL:" (if any) */
 559                 if ( strnequal( p, "URL:", 4 ) ) {
 560                         p += 4;
 561                 }
 562
 563                 sscanf(p, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 564
 565                 if (port == 0) {
 566                         if (strequal(protocol, "ldap")) {
 567                                 port = LDAP_PORT;
 568                         } else if (strequal(protocol, "ldaps")) {
 569                                 port = LDAPS_PORT;
 570                         } else {
 571                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 572                         }
 573                 }
 574
 575                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 576                         DEBUG(0, ("ldap_init failed !\n"));
 577                         return LDAP_OPERATIONS_ERROR;
 578                 }
 579
 580                 if (strequal(protocol, "ldaps")) {
 581 #ifdef LDAP_OPT_X_TLS
 582                         int tls = LDAP_OPT_X_TLS_HARD;
 583                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 584                         {
 585                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 586                         }
 587
 588                         DEBUG(3,("LDAPS option set...!\n"));
 589 #else
 590                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 591                         return LDAP_OPERATIONS_ERROR;
 592 #endif
 593                 }
 594         }
 595 #endif
 596
 597         /* Store the LDAP pointer in a lookup list */
 598
 599         smbldap_store_state(*ldap_struct, ldap_state);
 600
 601         /* Upgrade to LDAPv3 if possible */
 602
 603         if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
 604         {
 605                 if (version != LDAP_VERSION3)
 606                 {
 607                         version = LDAP_VERSION3;
 608                         if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
 609                                 ldap_v3 = True;
 610                         }
 611                 } else {
 612                         ldap_v3 = True;
 613                 }
 614         }
 615
 616         if (lp_ldap_ssl() == LDAP_SSL_START_TLS) {
 617 #ifdef LDAP_OPT_X_TLS
 618                 if (ldap_v3) {
 619                         if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
 620                         {
 621                                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 622                                          ldap_err2string(rc)));
 623                                 return rc;
 624                         }
 625                         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 626                 } else {
 627
 628                         DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 629                         return LDAP_OPERATIONS_ERROR;
 630                 }
 631 #else
 632                 DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n"));
 633                 return LDAP_OPERATIONS_ERROR;
 634 #endif
 635         }
 636
 637         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 638         return rc;
 639 }
 640
 641
 642 /*******************************************************************
 643  a rebind function for authenticated referrals
 644  This version takes a void* that we can shove useful stuff in :-)
 645 ******************************************************************/
 646 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 647 #else
 648 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 649                                    int *methodp, int freeit, void *arg)
 650 {
 651         struct smbldap_state *ldap_state = arg;
 652
 653         /** @TODO Should we be doing something to check what servers we rebind to?
 654             Could we get a referral to a machine that we don't want to give our
 655             username and password to? */
 656
 657         if (freeit) {
 658                 SAFE_FREE(*whop);
 659                 memset(*credp, '\0', strlen(*credp));
 660                 SAFE_FREE(*credp);
 661         } else {
 662                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 663                           ldap_state->bind_dn));
 664
 665                 *whop = strdup(ldap_state->bind_dn);
 666                 if (!*whop) {
 667                         return LDAP_NO_MEMORY;
 668                 }
 669                 *credp = strdup(ldap_state->bind_secret);
 670                 if (!*credp) {
 671                         SAFE_FREE(*whop);
 672                         return LDAP_NO_MEMORY;
 673                 }
 674                 *methodp = LDAP_AUTH_SIMPLE;
 675         }
 676
 677         gettimeofday(&(ldap_state->last_rebind),NULL);
 678
 679         return 0;
 680 }
 681 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 682
 683 /*******************************************************************
 684  a rebind function for authenticated referrals
 685  This version takes a void* that we can shove useful stuff in :-)
 686  and actually does the connection.
 687 ******************************************************************/
 688 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 689 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 690                                           LDAP_CONST char *url,
 691                                           ber_tag_t request,
 692                                           ber_int_t msgid, void *arg)
 693 {
 694         struct smbldap_state *ldap_state = arg;
 695         int rc;
 696         DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n",
 697                  ldap_state->bind_dn));
 698
 699         /** @TODO Should we be doing something to check what servers we rebind to?
 700             Could we get a referral to a machine that we don't want to give our
 701             username and password to? */
 702
 703         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 704
 705         gettimeofday(&(ldap_state->last_rebind),NULL);
 706
 707         return rc;
 708 }
 709 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 710
 711 /*******************************************************************
 712  Add a rebind function for authenticated referrals
 713 ******************************************************************/
 714 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 715 #else
 716 # if LDAP_SET_REBIND_PROC_ARGS == 2
 717 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 718                        int *method, int freeit )
 719 {
 720         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 721
 722         return rebindproc_with_state(ldap_struct, whop, credp,
 723                                      method, freeit, ldap_state);
 724
 725 }
 726 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 727 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 728
 729 /*******************************************************************
 730  a rebind function for authenticated referrals
 731  this also does the connection, but no void*.
 732 ******************************************************************/
 733 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 734 # if LDAP_SET_REBIND_PROC_ARGS == 2
 735 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 736                                ber_int_t msgid)
 737 {
 738         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 739
 740         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 741                                              ldap_state);
 742 }
 743 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 744 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 745
 746 /*******************************************************************
 747  connect to the ldap server under system privilege.
 748 ******************************************************************/
 749 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 750 {
 751         int rc;
 752         char *ldap_dn;
 753         char *ldap_secret;
 754
 755         /* get the password */
 756         if (!fetch_ldap_pw(&ldap_dn, &ldap_secret))
 757         {
 758                 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 759                 return LDAP_INVALID_CREDENTIALS;
 760         }
 761
 762         ldap_state->bind_dn = ldap_dn;
 763         ldap_state->bind_secret = ldap_secret;
 764
 765         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 766            (OpenLDAP) doesnt' seem to support it */
 767
 768         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 769                   ldap_state->uri, ldap_dn));
 770
 771 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 772 # if LDAP_SET_REBIND_PROC_ARGS == 2
 773         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 774 # endif
 775 # if LDAP_SET_REBIND_PROC_ARGS == 3
 776         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 777 # endif
 778 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 779 # if LDAP_SET_REBIND_PROC_ARGS == 2
 780         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 781 # endif
 782 # if LDAP_SET_REBIND_PROC_ARGS == 3
 783         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 784 # endif
 785 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 786
 787         rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);
 788
 789         if (rc != LDAP_SUCCESS) {
 790                 char *ld_error = NULL;
 791                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 792                                 &ld_error);
 793                 DEBUG(ldap_state->num_failures ? 2 : 0,
 794                       ("failed to bind to server with dn= %s Error: %s\n\t%s\n",
 795                                ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
 796                                ld_error ? ld_error : "(unknown)"));
 797                 SAFE_FREE(ld_error);
 798                 ldap_state->num_failures++;
 799                 return rc;
 800         }
 801
 802         ldap_state->num_failures = 0;
 803
 804         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 805         return rc;
 806 }
 807
 808 /**********************************************************************
 809 Connect to LDAP server (called before every ldap operation)
 810 *********************************************************************/
 811 static int smbldap_open(struct smbldap_state *ldap_state)
 812 {
 813         int rc;
 814         SMB_ASSERT(ldap_state);
 815
 816 #ifndef NO_LDAP_SECURITY
 817         if (geteuid() != 0) {
 818                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
 819                 return  LDAP_INSUFFICIENT_ACCESS;
 820         }
 821 #endif
 822
 823         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
 824                 struct sockaddr_un addr;
 825                 socklen_t len = sizeof(addr);
 826                 int sd;
 827                 if (ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd) == 0 &&
 828                     getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
 829                         /* the other end has died. reopen. */
 830                         ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 831                         ldap_state->ldap_struct = NULL;
 832                         ldap_state->last_ping = (time_t)0;
 833                 } else {
 834                         ldap_state->last_ping = time(NULL);
 835                 }
 836         }
 837
 838         if (ldap_state->ldap_struct != NULL) {
 839                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
 840                 return LDAP_SUCCESS;
 841         }
 842
 843         if ((rc = smbldap_open_connection(ldap_state))) {
 844                 return rc;
 845         }
 846
 847         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
 848                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 849                 ldap_state->ldap_struct = NULL;
 850                 return rc;
 851         }
 852
 853
 854         ldap_state->last_ping = time(NULL);
 855         DEBUG(4,("The LDAP server is succesful connected\n"));
 856
 857         return LDAP_SUCCESS;
 858 }
 859
 860 /**********************************************************************
 861 Disconnect from LDAP server
 862 *********************************************************************/
 863 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
 864 {
 865         if (!ldap_state)
 866                 return NT_STATUS_INVALID_PARAMETER;
 867
 868         if (ldap_state->ldap_struct != NULL) {
 869                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 870                 ldap_state->ldap_struct = NULL;
 871         }
 872
 873         smbldap_delete_state(ldap_state);
 874
 875         DEBUG(5,("The connection to the LDAP server was closed\n"));
 876         /* maybe free the results here --metze */
 877
 878
 879
 880         return NT_STATUS_OK;
 881 }
 882
 883 int smbldap_retry_open(struct smbldap_state *ldap_state, int *attempts)
 884 {
 885         int rc;
 886
 887         SMB_ASSERT(ldap_state && attempts);
 888
 889         if (*attempts != 0) {
 890                 unsigned int sleep_time;
 891                 uint8 rand_byte;
 892
 893                 /* Sleep for a random timeout */
 894                 rand_byte = (char)(sys_random());
 895
 896                 sleep_time = (((*attempts)*(*attempts))/2)*rand_byte*2;
 897                 /* we retry after (0.5, 1, 2, 3, 4.5, 6) seconds
 898                    on average.
 899                  */
 900                 DEBUG(3, ("Sleeping for %u milliseconds before reconnecting\n",
 901                           sleep_time));
 902                 smb_msleep(sleep_time);
 903         }
 904         (*attempts)++;
 905
 906         if ((rc = smbldap_open(ldap_state))) {
 907                 DEBUG(1,("Connection to LDAP Server failed for the %d try!\n",*attempts));
 908                 return rc;
 909         }
 910
 911         return LDAP_SUCCESS;
 912 }
 913
 914
 915 /*********************************************************************
 916  ********************************************************************/
 917
 918 int smbldap_search(struct smbldap_state *ldap_state,
 919                    const char *base, int scope, const char *filter,
 920                    char *attrs[], int attrsonly,
 921                    LDAPMessage **res)
 922 {
 923         int             rc = LDAP_SERVER_DOWN;
 924         int             attempts = 0;
 925         char           *utf8_filter;
 926
 927         SMB_ASSERT(ldap_state);
 928
 929         DEBUG(5,("smbldap_search: base => [%s], filter => [%s], scope => [%d]\n",
 930                 base, filter, scope));
 931
 932         if (ldap_state->last_rebind.tv_sec > 0) {
 933                 struct timeval  tval;
 934                 int             tdiff = 0;
 935                 int             sleep_time = 0;
 936
 937                 ZERO_STRUCT(tval);
 938
 939                 gettimeofday(&tval,NULL);
 940
 941                 tdiff = 1000000 *(tval.tv_sec - ldap_state->last_rebind.tv_sec) +
 942                         (tval.tv_usec - ldap_state->last_rebind.tv_usec);
 943
 944                 sleep_time = ((1000*lp_ldap_replication_sleep())-tdiff)/1000;
 945
 946                 if (sleep_time > 0) {
 947                         /* we wait for the LDAP replication */
 948                         DEBUG(5,("smbldap_search: waiting %d milliseconds for LDAP replication.\n",sleep_time));
 949                         smb_msleep(sleep_time);
 950                         DEBUG(5,("smbldap_search: go on!\n"));
 951                         ZERO_STRUCT(ldap_state->last_rebind);
 952                 }
 953         }
 954
 955         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
 956                 return LDAP_NO_MEMORY;
 957         }
 958
 959         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
 960
 961                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
 962                         continue;
 963
 964                 rc = ldap_search_s(ldap_state->ldap_struct, base, scope,
 965                                    utf8_filter, attrs, attrsonly, res);
 966         }
 967
 968         if (rc == LDAP_SERVER_DOWN) {
 969                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
 970                 smbldap_close(ldap_state);
 971         }
 972
 973         ldap_state->last_use = time(NULL);
 974
 975         SAFE_FREE(utf8_filter);
 976         return rc;
 977 }
 978
 979 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
 980 {
 981         int             rc = LDAP_SERVER_DOWN;
 982         int             attempts = 0;
 983         char           *utf8_dn;
 984
 985         SMB_ASSERT(ldap_state);
 986
 987         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
 988
 989         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
 990                 return LDAP_NO_MEMORY;
 991         }
 992
 993         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
 994
 995                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
 996                         continue;
 997
 998                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
 999         }
1000
1001         if (rc == LDAP_SERVER_DOWN) {
1002                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1003                 smbldap_close(ldap_state);
1004         }
1005
1006         ldap_state->last_use = time(NULL);
1007
1008         SAFE_FREE(utf8_dn);
1009         return rc;
1010 }
1011
1012 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1013 {
1014         int             rc = LDAP_SERVER_DOWN;
1015         int             attempts = 0;
1016         char           *utf8_dn;
1017
1018         SMB_ASSERT(ldap_state);
1019
1020         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1021
1022         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1023                 return LDAP_NO_MEMORY;
1024         }
1025
1026         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1027
1028                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1029                         continue;
1030
1031                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1032         }
1033
1034         if (rc == LDAP_SERVER_DOWN) {
1035                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1036                 smbldap_close(ldap_state);
1037         }
1038
1039         ldap_state->last_use = time(NULL);
1040
1041         SAFE_FREE(utf8_dn);
1042         return rc;
1043 }
1044
1045 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1046 {
1047         int             rc = LDAP_SERVER_DOWN;
1048         int             attempts = 0;
1049         char           *utf8_dn;
1050
1051         SMB_ASSERT(ldap_state);
1052
1053         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1054
1055         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1056                 return LDAP_NO_MEMORY;
1057         }
1058
1059         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1060
1061                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1062                         continue;
1063
1064                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1065         }
1066
1067         if (rc == LDAP_SERVER_DOWN) {
1068                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1069                 smbldap_close(ldap_state);
1070         }
1071
1072         ldap_state->last_use = time(NULL);
1073
1074         SAFE_FREE(utf8_dn);
1075         return rc;
1076 }
1077
1078 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1079                                LDAP_CONST char *reqoid, struct berval *reqdata,
1080                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1081                                char **retoidp, struct berval **retdatap)
1082 {
1083         int             rc = LDAP_SERVER_DOWN;
1084         int             attempts = 0;
1085
1086         if (!ldap_state)
1087                 return (-1);
1088
1089         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1090
1091                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1092                         continue;
1093
1094                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid, reqdata,
1095                                                serverctrls, clientctrls, retoidp, retdatap);
1096         }
1097
1098         if (rc == LDAP_SERVER_DOWN) {
1099                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1100                 smbldap_close(ldap_state);
1101         }
1102
1103         ldap_state->last_use = time(NULL);
1104
1105         return rc;
1106 }
1107
1108 /*******************************************************************
1109  run the search by name.
1110 ******************************************************************/
1111 int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter,
1112                            char **search_attr, LDAPMessage ** result)
1113 {
1114         int scope = LDAP_SCOPE_SUBTREE;
1115         int rc;
1116
1117         rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);
1118
1119         if (rc != LDAP_SUCCESS) {
1120                 char *ld_error = NULL;
1121                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1122                                 &ld_error);
1123                 DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n",
1124                         ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
1125                 SAFE_FREE(ld_error);
1126         }
1127
1128         return rc;
1129 }
1130
1131 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1132 {
1133         struct smbldap_state *state = (struct smbldap_state *)(*data);
1134
1135         if (state->ldap_struct == NULL) {
1136                 DEBUG(10,("ldap connection not connected...\n"));
1137                 return;
1138         }
1139
1140         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1141                 DEBUG(10,("ldap connection not idle...\n"));
1142                 return;
1143         }
1144
1145         DEBUG(7,("ldap connection idle...closing connection\n"));
1146         smbldap_close(state);
1147 }
1148
1149 /**********************************************************************
1150  Housekeeping
1151  *********************************************************************/
1152
1153 void smbldap_free_struct(struct smbldap_state **ldap_state)
1154 {
1155         smbldap_close(*ldap_state);
1156
1157         if ((*ldap_state)->bind_secret) {
1158                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1159         }
1160
1161         SAFE_FREE((*ldap_state)->bind_dn);
1162         SAFE_FREE((*ldap_state)->bind_secret);
1163
1164         smb_unregister_idle_event((*ldap_state)->event_id);
1165
1166         *ldap_state = NULL;
1167
1168         /* No need to free any further, as it is talloc()ed */
1169 }
1170
1171
1172 /**********************************************************************
1173  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1174  *********************************************************************/
1175
1176 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state)
1177 {
1178         *smbldap_state = talloc_zero(mem_ctx, sizeof(**smbldap_state));
1179         if (!*smbldap_state) {
1180                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1181                 return NT_STATUS_NO_MEMORY;
1182         }
1183
1184         if (location) {
1185                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1186         } else {
1187                 (*smbldap_state)->uri = "ldap://localhost";
1188         }
1189
1190         (*smbldap_state)->event_id =
1191                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1192                                         SMBLDAP_IDLE_TIME);
1193
1194         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1195                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1196                 return NT_STATUS_INVALID_HANDLE;
1197         }
1198
1199         return NT_STATUS_OK;
1200 }
1201
1202 /*******************************************************************
1203  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1204 ********************************************************************/
1205
1206 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1207 {
1208         char *utf8_dn, *unix_dn;
1209
1210         utf8_dn = ldap_get_dn(ld, entry);
1211         if (!utf8_dn) {
1212                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1213                 return NULL;
1214         }
1215         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1216                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1217                 return NULL;
1218         }
1219         ldap_memfree(utf8_dn);
1220         return unix_dn;
1221 }