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_MOD_TIMESTAMP,      "modifyTimestamp"       },
 104         { LDAP_ATTR_LIST_END,           NULL                    }
 105 };
 106
 107 /* attributes used for allocating RIDs */
 108
 109 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 110         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 111         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 112         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 113         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 114         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 115         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 116         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 117         { LDAP_ATTR_LIST_END,           NULL                    },
 118 };
 119
 120 /* Samba 3.0 group mapping attributes */
 121
 122 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 123         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 124         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 125         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 126         { LDAP_ATTR_DESC,               "description"           },
 127         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 128         { LDAP_ATTR_CN,                 "cn"                    },
 129         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 130         { LDAP_ATTR_LIST_END,           NULL                    }
 131 };
 132
 133 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 134         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 135         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 136         { LDAP_ATTR_DESC,               "description"           },
 137         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 138         { LDAP_ATTR_LIST_END,           NULL                    }
 139 };
 140
 141 /* idmap_ldap sambaUnixIdPool */
 142
 143 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 144         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 145         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 146         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 147         { LDAP_ATTR_LIST_END,           NULL                    }
 148 };
 149
 150 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 151         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 152         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 153         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 154         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 155         { LDAP_ATTR_LIST_END,           NULL                    }
 156 };
 157
 158 /* privileges */
 159
 160 ATTRIB_MAP_ENTRY privilege_attr_list[] = {
 161         { LDAP_ATTR_CN,                 "sambaPrivName"         },
 162         { LDAP_ATTR_SID_LIST,           LDAP_ATTRIBUTE_SID_LIST },
 163         { LDAP_ATTR_DESC,               "description"           },
 164         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 165         { LDAP_ATTR_LIST_END,           NULL                    }
 166 };
 167
 168 /**********************************************************************
 169  perform a simple table lookup and return the attribute name
 170  **********************************************************************/
 171
 172  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 173 {
 174         int i = 0;
 175
 176         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 177                 if ( table[i].attrib == key )
 178                         return table[i].name;
 179                 i++;
 180         }
 181
 182         return NULL;
 183 }
 184
 185
 186 /**********************************************************************
 187  Return the list of attribute names from a mapping table
 188  **********************************************************************/
 189
 190  char** get_attr_list( ATTRIB_MAP_ENTRY table[] )
 191 {
 192         char **names;
 193         int i = 0;
 194
 195         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 196                 i++;
 197         i++;
 198
 199         names = (char**)malloc( sizeof(char*)*i );
 200         if ( !names ) {
 201                 DEBUG(0,("get_attr_list: out of memory\n"));
 202                 return NULL;
 203         }
 204
 205         i = 0;
 206         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 207                 names[i] = strdup( table[i].name );
 208                 i++;
 209         }
 210         names[i] = NULL;
 211
 212         return names;
 213 }
 214
 215 /*********************************************************************
 216  Cleanup
 217  ********************************************************************/
 218
 219  void free_attr_list( char **list )
 220 {
 221         int i = 0;
 222
 223         if ( !list )
 224                 return;
 225
 226         while ( list[i] ) {
 227                 SAFE_FREE( list[i] );
 228                 i+=1;
 229         }
 230
 231         SAFE_FREE( list );
 232 }
 233
 234 /*******************************************************************
 235  find the ldap password
 236 ******************************************************************/
 237 static BOOL fetch_ldap_pw(char **dn, char** pw)
 238 {
 239         char *key = NULL;
 240         size_t size;
 241
 242         *dn = smb_xstrdup(lp_ldap_admin_dn());
 243
 244         if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
 245                 SAFE_FREE(*dn);
 246                 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
 247         }
 248
 249         *pw=secrets_fetch(key, &size);
 250         SAFE_FREE(key);
 251
 252         if (!size) {
 253                 /* Upgrade 2.2 style entry */
 254                 char *p;
 255                 char* old_style_key = strdup(*dn);
 256                 char *data;
 257                 fstring old_style_pw;
 258
 259                 if (!old_style_key) {
 260                         DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
 261                         return False;
 262                 }
 263
 264                 for (p=old_style_key; *p; p++)
 265                         if (*p == ',') *p = '/';
 266
 267                 data=secrets_fetch(old_style_key, &size);
 268                 if (!size && size < sizeof(old_style_pw)) {
 269                         DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
 270                         SAFE_FREE(old_style_key);
 271                         SAFE_FREE(*dn);
 272                         return False;
 273                 }
 274
 275                 size = MIN(size, sizeof(fstring)-1);
 276                 strncpy(old_style_pw, data, size);
 277                 old_style_pw[size] = 0;
 278
 279                 SAFE_FREE(data);
 280
 281                 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
 282                         DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
 283                         SAFE_FREE(old_style_key);
 284                         SAFE_FREE(*dn);
 285                         return False;
 286                 }
 287                 if (!secrets_delete(old_style_key)) {
 288                         DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
 289                 }
 290
 291                 SAFE_FREE(old_style_key);
 292
 293                 *pw = smb_xstrdup(old_style_pw);
 294         }
 295
 296         return True;
 297 }
 298
 299 /*******************************************************************
 300  Search an attribute and return the first value found.
 301 ******************************************************************/
 302
 303  BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 304                                     const char *attribute, char *value,
 305                                     int max_len)
 306 {
 307         char **values;
 308
 309         if ( !attribute )
 310                 return False;
 311
 312         value[0] = '\0';
 313
 314         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 315                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 316
 317                 return False;
 318         }
 319
 320         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 321                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 322                           attribute, values[0]));
 323                 ldap_value_free(values);
 324                 return False;
 325         }
 326
 327         ldap_value_free(values);
 328 #ifdef DEBUG_PASSWORDS
 329         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 330 #endif
 331         return True;
 332 }
 333
 334  BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
 335                                   const char *attribute, pstring value)
 336 {
 337         return smbldap_get_single_attribute(ldap_struct, entry,
 338                                             attribute, value,
 339                                             sizeof(pstring));
 340 }
 341
 342 /************************************************************************
 343  Routine to manage the LDAPMod structure array
 344  manage memory used by the array, by each struct, and values
 345  ***********************************************************************/
 346
 347  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 348 {
 349         LDAPMod **mods;
 350         int i;
 351         int j;
 352
 353         mods = *modlist;
 354
 355         /* sanity checks on the mod values */
 356
 357         if (attribute == NULL || *attribute == '\0')
 358                 return;
 359 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 360            left here so other so re-add similar code   --jerry */
 361         if (value == NULL || *value == '\0')
 362                 return;
 363 #endif
 364
 365         if (mods == NULL)
 366         {
 367                 mods = (LDAPMod **) malloc(sizeof(LDAPMod *));
 368                 if (mods == NULL)
 369                 {
 370                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 371                         return;
 372                 }
 373                 mods[0] = NULL;
 374         }
 375
 376         for (i = 0; mods[i] != NULL; ++i) {
 377                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 378                         break;
 379         }
 380
 381         if (mods[i] == NULL)
 382         {
 383                 mods = (LDAPMod **) Realloc (mods, (i + 2) * sizeof (LDAPMod *));
 384                 if (mods == NULL)
 385                 {
 386                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 387                         return;
 388                 }
 389                 mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
 390                 if (mods[i] == NULL)
 391                 {
 392                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 393                         return;
 394                 }
 395                 mods[i]->mod_op = modop;
 396                 mods[i]->mod_values = NULL;
 397                 mods[i]->mod_type = strdup(attribute);
 398                 mods[i + 1] = NULL;
 399         }
 400
 401         if (value != NULL)
 402         {
 403                 char *utf8_value = NULL;
 404
 405                 j = 0;
 406                 if (mods[i]->mod_values != NULL) {
 407                         for (; mods[i]->mod_values[j] != NULL; j++);
 408                 }
 409                 mods[i]->mod_values = (char **)Realloc(mods[i]->mod_values,
 410                                                (j + 2) * sizeof (char *));
 411
 412                 if (mods[i]->mod_values == NULL) {
 413                         DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
 414                         return;
 415                 }
 416
 417                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
 418                         DEBUG (0, ("make_a_mod: String conversion failure!\n"));
 419                         return;
 420                 }
 421
 422                 mods[i]->mod_values[j] = utf8_value;
 423
 424                 mods[i]->mod_values[j + 1] = NULL;
 425         }
 426         *modlist = mods;
 427 }
 428
 429 /**********************************************************************
 430   Set attribute to newval in LDAP, regardless of what value the
 431   attribute had in LDAP before.
 432 *********************************************************************/
 433
 434  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 435                       LDAPMod ***mods,
 436                       const char *attribute, const char *newval)
 437 {
 438         char oldval[2048]; /* current largest allowed value is mungeddial */
 439         BOOL existed;
 440
 441         if (existing != NULL) {
 442                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 443         } else {
 444                 existed = False;
 445                 *oldval = '\0';
 446         }
 447
 448         /* all of our string attributes are case insensitive */
 449
 450         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 451
 452                 /* Believe it or not, but LDAP will deny a delete and
 453                    an add at the same time if the values are the
 454                    same... */
 455                 return;
 456         }
 457
 458         if (existed) {
 459                 /* There has been no value before, so don't delete it.
 460                  * Here's a possible race: We might end up with
 461                  * duplicate attributes */
 462                 /* By deleting exactly the value we found in the entry this
 463                  * should be race-free in the sense that the LDAP-Server will
 464                  * deny the complete operation if somebody changed the
 465                  * attribute behind our back. */
 466                 /* This will also allow modifying single valued attributes
 467                  * in Novell NDS. In NDS you have to first remove attribute and then
 468                  * you could add new value */
 469
 470                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 471         }
 472
 473         /* Regardless of the real operation (add or modify)
 474            we add the new value here. We rely on deleting
 475            the old value, should it exist. */
 476
 477         if ((newval != NULL) && (strlen(newval) > 0)) {
 478                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 479         }
 480 }
 481
 482 /**********************************************************************
 483  Some varients of the LDAP rebind code do not pass in the third 'arg'
 484  pointer to a void*, so we try and work around it by assuming that the
 485  value of the 'LDAP *' pointer is the same as the one we had passed in
 486  **********************************************************************/
 487
 488 struct smbldap_state_lookup {
 489         LDAP *ld;
 490         struct smbldap_state *smbldap_state;
 491         struct smbldap_state_lookup *prev, *next;
 492 };
 493
 494 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 495
 496 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 497 {
 498         struct smbldap_state_lookup *t;
 499
 500         for (t = smbldap_state_lookup_list; t; t = t->next) {
 501                 if (t->ld == ld) {
 502                         return t->smbldap_state;
 503                 }
 504         }
 505         return NULL;
 506 }
 507
 508 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 509 {
 510         struct smbldap_state_lookup *t;
 511
 512         for (t = smbldap_state_lookup_list; t; t = t->next) {
 513                 if (t->smbldap_state == smbldap_state) {
 514                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 515                         SAFE_FREE(t);
 516                         return;
 517                 }
 518         }
 519 }
 520
 521 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 522 {
 523         struct smbldap_state *tmp_ldap_state;
 524         struct smbldap_state_lookup *t;
 525         struct smbldap_state_lookup *tmp;
 526
 527         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 528                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 529                 return;
 530         }
 531
 532         t = smb_xmalloc(sizeof(*t));
 533         ZERO_STRUCTP(t);
 534
 535         DLIST_ADD_END(smbldap_state_lookup_list, t, tmp);
 536         t->ld = ld;
 537         t->smbldap_state = smbldap_state;
 538 }
 539
 540 /*******************************************************************
 541  open a connection to the ldap server.
 542 ******************************************************************/
 543 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 544
 545 {
 546         int rc = LDAP_SUCCESS;
 547         int version;
 548         BOOL ldap_v3 = False;
 549         LDAP **ldap_struct = &ldap_state->ldap_struct;
 550
 551 #ifdef HAVE_LDAP_INITIALIZE
 552         DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri));
 553
 554         if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) {
 555                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 556                 return rc;
 557         }
 558 #else
 559
 560         /* Parse the string manually */
 561
 562         {
 563                 int port = 0;
 564                 fstring protocol;
 565                 fstring host;
 566                 const char *p = ldap_state->uri;
 567                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 568
 569                 /* skip leading "URL:" (if any) */
 570                 if ( strnequal( p, "URL:", 4 ) ) {
 571                         p += 4;
 572                 }
 573
 574                 sscanf(p, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 575
 576                 if (port == 0) {
 577                         if (strequal(protocol, "ldap")) {
 578                                 port = LDAP_PORT;
 579                         } else if (strequal(protocol, "ldaps")) {
 580                                 port = LDAPS_PORT;
 581                         } else {
 582                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 583                         }
 584                 }
 585
 586                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 587                         DEBUG(0, ("ldap_init failed !\n"));
 588                         return LDAP_OPERATIONS_ERROR;
 589                 }
 590
 591                 if (strequal(protocol, "ldaps")) {
 592 #ifdef LDAP_OPT_X_TLS
 593                         int tls = LDAP_OPT_X_TLS_HARD;
 594                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 595                         {
 596                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 597                         }
 598
 599                         DEBUG(3,("LDAPS option set...!\n"));
 600 #else
 601                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 602                         return LDAP_OPERATIONS_ERROR;
 603 #endif
 604                 }
 605         }
 606 #endif
 607
 608         /* Store the LDAP pointer in a lookup list */
 609
 610         smbldap_store_state(*ldap_struct, ldap_state);
 611
 612         /* Upgrade to LDAPv3 if possible */
 613
 614         if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
 615         {
 616                 if (version != LDAP_VERSION3)
 617                 {
 618                         version = LDAP_VERSION3;
 619                         if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
 620                                 ldap_v3 = True;
 621                         }
 622                 } else {
 623                         ldap_v3 = True;
 624                 }
 625         }
 626
 627         if (lp_ldap_ssl() == LDAP_SSL_START_TLS) {
 628 #ifdef LDAP_OPT_X_TLS
 629                 if (ldap_v3) {
 630                         if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
 631                         {
 632                                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 633                                          ldap_err2string(rc)));
 634                                 return rc;
 635                         }
 636                         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 637                 } else {
 638
 639                         DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 640                         return LDAP_OPERATIONS_ERROR;
 641                 }
 642 #else
 643                 DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n"));
 644                 return LDAP_OPERATIONS_ERROR;
 645 #endif
 646         }
 647
 648         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 649         return rc;
 650 }
 651
 652
 653 /*******************************************************************
 654  a rebind function for authenticated referrals
 655  This version takes a void* that we can shove useful stuff in :-)
 656 ******************************************************************/
 657 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 658 #else
 659 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 660                                    int *methodp, int freeit, void *arg)
 661 {
 662         struct smbldap_state *ldap_state = arg;
 663
 664         /** @TODO Should we be doing something to check what servers we rebind to?
 665             Could we get a referral to a machine that we don't want to give our
 666             username and password to? */
 667
 668         if (freeit) {
 669                 SAFE_FREE(*whop);
 670                 memset(*credp, '\0', strlen(*credp));
 671                 SAFE_FREE(*credp);
 672         } else {
 673                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 674                           ldap_state->bind_dn));
 675
 676                 *whop = strdup(ldap_state->bind_dn);
 677                 if (!*whop) {
 678                         return LDAP_NO_MEMORY;
 679                 }
 680                 *credp = strdup(ldap_state->bind_secret);
 681                 if (!*credp) {
 682                         SAFE_FREE(*whop);
 683                         return LDAP_NO_MEMORY;
 684                 }
 685                 *methodp = LDAP_AUTH_SIMPLE;
 686         }
 687
 688         gettimeofday(&(ldap_state->last_rebind),NULL);
 689
 690         return 0;
 691 }
 692 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 693
 694 /*******************************************************************
 695  a rebind function for authenticated referrals
 696  This version takes a void* that we can shove useful stuff in :-)
 697  and actually does the connection.
 698 ******************************************************************/
 699 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 700 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 701                                           LDAP_CONST char *url,
 702                                           ber_tag_t request,
 703                                           ber_int_t msgid, void *arg)
 704 {
 705         struct smbldap_state *ldap_state = arg;
 706         int rc;
 707         DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n",
 708                  ldap_state->bind_dn));
 709
 710         /** @TODO Should we be doing something to check what servers we rebind to?
 711             Could we get a referral to a machine that we don't want to give our
 712             username and password to? */
 713
 714         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 715
 716         gettimeofday(&(ldap_state->last_rebind),NULL);
 717
 718         return rc;
 719 }
 720 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 721
 722 /*******************************************************************
 723  Add a rebind function for authenticated referrals
 724 ******************************************************************/
 725 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 726 #else
 727 # if LDAP_SET_REBIND_PROC_ARGS == 2
 728 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 729                        int *method, int freeit )
 730 {
 731         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 732
 733         return rebindproc_with_state(ldap_struct, whop, credp,
 734                                      method, freeit, ldap_state);
 735
 736 }
 737 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 738 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 739
 740 /*******************************************************************
 741  a rebind function for authenticated referrals
 742  this also does the connection, but no void*.
 743 ******************************************************************/
 744 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 745 # if LDAP_SET_REBIND_PROC_ARGS == 2
 746 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 747                                ber_int_t msgid)
 748 {
 749         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 750
 751         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 752                                              ldap_state);
 753 }
 754 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 755 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 756
 757 /*******************************************************************
 758  connect to the ldap server under system privilege.
 759 ******************************************************************/
 760 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 761 {
 762         int rc;
 763         char *ldap_dn;
 764         char *ldap_secret;
 765
 766         /* get the password */
 767         if (!fetch_ldap_pw(&ldap_dn, &ldap_secret))
 768         {
 769                 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 770                 return LDAP_INVALID_CREDENTIALS;
 771         }
 772
 773         ldap_state->bind_dn = ldap_dn;
 774         ldap_state->bind_secret = ldap_secret;
 775
 776         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 777            (OpenLDAP) doesnt' seem to support it */
 778
 779         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 780                   ldap_state->uri, ldap_dn));
 781
 782 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 783 # if LDAP_SET_REBIND_PROC_ARGS == 2
 784         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 785 # endif
 786 # if LDAP_SET_REBIND_PROC_ARGS == 3
 787         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 788 # endif
 789 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 790 # if LDAP_SET_REBIND_PROC_ARGS == 2
 791         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 792 # endif
 793 # if LDAP_SET_REBIND_PROC_ARGS == 3
 794         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 795 # endif
 796 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 797
 798         rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);
 799
 800         if (rc != LDAP_SUCCESS) {
 801                 char *ld_error = NULL;
 802                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 803                                 &ld_error);
 804                 DEBUG(ldap_state->num_failures ? 2 : 0,
 805                       ("failed to bind to server with dn= %s Error: %s\n\t%s\n",
 806                                ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
 807                                ld_error ? ld_error : "(unknown)"));
 808                 SAFE_FREE(ld_error);
 809                 ldap_state->num_failures++;
 810                 return rc;
 811         }
 812
 813         ldap_state->num_failures = 0;
 814
 815         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 816         return rc;
 817 }
 818
 819 /**********************************************************************
 820 Connect to LDAP server (called before every ldap operation)
 821 *********************************************************************/
 822 static int smbldap_open(struct smbldap_state *ldap_state)
 823 {
 824         int rc;
 825         SMB_ASSERT(ldap_state);
 826
 827 #ifndef NO_LDAP_SECURITY
 828         if (geteuid() != 0) {
 829                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
 830                 return  LDAP_INSUFFICIENT_ACCESS;
 831         }
 832 #endif
 833
 834         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
 835                 struct sockaddr_un addr;
 836                 socklen_t len = sizeof(addr);
 837                 int sd;
 838                 if (ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd) == 0 &&
 839                     getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
 840                         /* the other end has died. reopen. */
 841                         ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 842                         ldap_state->ldap_struct = NULL;
 843                         ldap_state->last_ping = (time_t)0;
 844                 } else {
 845                         ldap_state->last_ping = time(NULL);
 846                 }
 847         }
 848
 849         if (ldap_state->ldap_struct != NULL) {
 850                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
 851                 return LDAP_SUCCESS;
 852         }
 853
 854         if ((rc = smbldap_open_connection(ldap_state))) {
 855                 return rc;
 856         }
 857
 858         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
 859                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 860                 ldap_state->ldap_struct = NULL;
 861                 return rc;
 862         }
 863
 864
 865         ldap_state->last_ping = time(NULL);
 866         DEBUG(4,("The LDAP server is succesful connected\n"));
 867
 868         return LDAP_SUCCESS;
 869 }
 870
 871 /**********************************************************************
 872 Disconnect from LDAP server
 873 *********************************************************************/
 874 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
 875 {
 876         if (!ldap_state)
 877                 return NT_STATUS_INVALID_PARAMETER;
 878
 879         if (ldap_state->ldap_struct != NULL) {
 880                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 881                 ldap_state->ldap_struct = NULL;
 882         }
 883
 884         smbldap_delete_state(ldap_state);
 885
 886         DEBUG(5,("The connection to the LDAP server was closed\n"));
 887         /* maybe free the results here --metze */
 888
 889
 890
 891         return NT_STATUS_OK;
 892 }
 893
 894 int smbldap_retry_open(struct smbldap_state *ldap_state, int *attempts)
 895 {
 896         int rc;
 897
 898         SMB_ASSERT(ldap_state && attempts);
 899
 900         if (*attempts != 0) {
 901                 unsigned int sleep_time;
 902                 uint8 rand_byte;
 903
 904                 /* Sleep for a random timeout */
 905                 rand_byte = (char)(sys_random());
 906
 907                 sleep_time = (((*attempts)*(*attempts))/2)*rand_byte*2;
 908                 /* we retry after (0.5, 1, 2, 3, 4.5, 6) seconds
 909                    on average.
 910                  */
 911                 DEBUG(3, ("Sleeping for %u milliseconds before reconnecting\n",
 912                           sleep_time));
 913                 smb_msleep(sleep_time);
 914         }
 915         (*attempts)++;
 916
 917         if ((rc = smbldap_open(ldap_state))) {
 918                 DEBUG(1,("Connection to LDAP Server failed for the %d try!\n",*attempts));
 919                 return rc;
 920         }
 921
 922         return LDAP_SUCCESS;
 923 }
 924
 925
 926 /*********************************************************************
 927  ********************************************************************/
 928
 929 int smbldap_search(struct smbldap_state *ldap_state,
 930                    const char *base, int scope, const char *filter,
 931                    char *attrs[], int attrsonly,
 932                    LDAPMessage **res)
 933 {
 934         int             rc = LDAP_SERVER_DOWN;
 935         int             attempts = 0;
 936         char           *utf8_filter;
 937
 938         SMB_ASSERT(ldap_state);
 939
 940         DEBUG(5,("smbldap_search: base => [%s], filter => [%s], scope => [%d]\n",
 941                 base, filter, scope));
 942
 943         if (ldap_state->last_rebind.tv_sec > 0) {
 944                 struct timeval  tval;
 945                 int             tdiff = 0;
 946                 int             sleep_time = 0;
 947
 948                 ZERO_STRUCT(tval);
 949
 950                 gettimeofday(&tval,NULL);
 951
 952                 tdiff = 1000000 *(tval.tv_sec - ldap_state->last_rebind.tv_sec) +
 953                         (tval.tv_usec - ldap_state->last_rebind.tv_usec);
 954
 955                 sleep_time = ((1000*lp_ldap_replication_sleep())-tdiff)/1000;
 956
 957                 if (sleep_time > 0) {
 958                         /* we wait for the LDAP replication */
 959                         DEBUG(5,("smbldap_search: waiting %d milliseconds for LDAP replication.\n",sleep_time));
 960                         smb_msleep(sleep_time);
 961                         DEBUG(5,("smbldap_search: go on!\n"));
 962                         ZERO_STRUCT(ldap_state->last_rebind);
 963                 }
 964         }
 965
 966         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
 967                 return LDAP_NO_MEMORY;
 968         }
 969
 970         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
 971
 972                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
 973                         continue;
 974
 975                 rc = ldap_search_s(ldap_state->ldap_struct, base, scope,
 976                                    utf8_filter, attrs, attrsonly, res);
 977         }
 978
 979         if (rc == LDAP_SERVER_DOWN) {
 980                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
 981                 smbldap_close(ldap_state);
 982         }
 983
 984         ldap_state->last_use = time(NULL);
 985
 986         SAFE_FREE(utf8_filter);
 987         return rc;
 988 }
 989
 990 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
 991 {
 992         int             rc = LDAP_SERVER_DOWN;
 993         int             attempts = 0;
 994         char           *utf8_dn;
 995
 996         SMB_ASSERT(ldap_state);
 997
 998         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
 999
1000         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1001                 return LDAP_NO_MEMORY;
1002         }
1003
1004         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1005
1006                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1007                         continue;
1008
1009                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1010         }
1011
1012         if (rc == LDAP_SERVER_DOWN) {
1013                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1014                 smbldap_close(ldap_state);
1015         }
1016
1017         ldap_state->last_use = time(NULL);
1018
1019         SAFE_FREE(utf8_dn);
1020         return rc;
1021 }
1022
1023 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1024 {
1025         int             rc = LDAP_SERVER_DOWN;
1026         int             attempts = 0;
1027         char           *utf8_dn;
1028
1029         SMB_ASSERT(ldap_state);
1030
1031         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1032
1033         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1034                 return LDAP_NO_MEMORY;
1035         }
1036
1037         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1038
1039                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1040                         continue;
1041
1042                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1043         }
1044
1045         if (rc == LDAP_SERVER_DOWN) {
1046                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1047                 smbldap_close(ldap_state);
1048         }
1049
1050         ldap_state->last_use = time(NULL);
1051
1052         SAFE_FREE(utf8_dn);
1053         return rc;
1054 }
1055
1056 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1057 {
1058         int             rc = LDAP_SERVER_DOWN;
1059         int             attempts = 0;
1060         char           *utf8_dn;
1061
1062         SMB_ASSERT(ldap_state);
1063
1064         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1065
1066         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1067                 return LDAP_NO_MEMORY;
1068         }
1069
1070         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1071
1072                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1073                         continue;
1074
1075                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1076         }
1077
1078         if (rc == LDAP_SERVER_DOWN) {
1079                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1080                 smbldap_close(ldap_state);
1081         }
1082
1083         ldap_state->last_use = time(NULL);
1084
1085         SAFE_FREE(utf8_dn);
1086         return rc;
1087 }
1088
1089 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1090                                LDAP_CONST char *reqoid, struct berval *reqdata,
1091                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1092                                char **retoidp, struct berval **retdatap)
1093 {
1094         int             rc = LDAP_SERVER_DOWN;
1095         int             attempts = 0;
1096
1097         if (!ldap_state)
1098                 return (-1);
1099
1100         while ((rc == LDAP_SERVER_DOWN) && (attempts < SMBLDAP_NUM_RETRIES)) {
1101
1102                 if ((rc = smbldap_retry_open(ldap_state,&attempts)) != LDAP_SUCCESS)
1103                         continue;
1104
1105                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid, reqdata,
1106                                                serverctrls, clientctrls, retoidp, retdatap);
1107         }
1108
1109         if (rc == LDAP_SERVER_DOWN) {
1110                 DEBUG(0,("%s: LDAP server is down!\n",FUNCTION_MACRO));
1111                 smbldap_close(ldap_state);
1112         }
1113
1114         ldap_state->last_use = time(NULL);
1115
1116         return rc;
1117 }
1118
1119 /*******************************************************************
1120  run the search by name.
1121 ******************************************************************/
1122 int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter,
1123                            char **search_attr, LDAPMessage ** result)
1124 {
1125         int scope = LDAP_SCOPE_SUBTREE;
1126         int rc;
1127
1128         rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);
1129
1130         if (rc != LDAP_SUCCESS) {
1131                 char *ld_error = NULL;
1132                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1133                                 &ld_error);
1134                 DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n",
1135                         ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
1136                 SAFE_FREE(ld_error);
1137         }
1138
1139         return rc;
1140 }
1141
1142 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1143 {
1144         struct smbldap_state *state = (struct smbldap_state *)(*data);
1145
1146         if (state->ldap_struct == NULL) {
1147                 DEBUG(10,("ldap connection not connected...\n"));
1148                 return;
1149         }
1150
1151         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1152                 DEBUG(10,("ldap connection not idle...\n"));
1153                 return;
1154         }
1155
1156         DEBUG(7,("ldap connection idle...closing connection\n"));
1157         smbldap_close(state);
1158 }
1159
1160 /**********************************************************************
1161  Housekeeping
1162  *********************************************************************/
1163
1164 void smbldap_free_struct(struct smbldap_state **ldap_state)
1165 {
1166         smbldap_close(*ldap_state);
1167
1168         if ((*ldap_state)->bind_secret) {
1169                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1170         }
1171
1172         SAFE_FREE((*ldap_state)->bind_dn);
1173         SAFE_FREE((*ldap_state)->bind_secret);
1174
1175         smb_unregister_idle_event((*ldap_state)->event_id);
1176
1177         *ldap_state = NULL;
1178
1179         /* No need to free any further, as it is talloc()ed */
1180 }
1181
1182
1183 /**********************************************************************
1184  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1185  *********************************************************************/
1186
1187 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state)
1188 {
1189         *smbldap_state = talloc_zero(mem_ctx, sizeof(**smbldap_state));
1190         if (!*smbldap_state) {
1191                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1192                 return NT_STATUS_NO_MEMORY;
1193         }
1194
1195         if (location) {
1196                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1197         } else {
1198                 (*smbldap_state)->uri = "ldap://localhost";
1199         }
1200
1201         (*smbldap_state)->event_id =
1202                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1203                                         SMBLDAP_IDLE_TIME);
1204
1205         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1206                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1207                 return NT_STATUS_INVALID_HANDLE;
1208         }
1209
1210         return NT_STATUS_OK;
1211 }
1212
1213 /*******************************************************************
1214  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1215 ********************************************************************/
1216
1217 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1218 {
1219         char *utf8_dn, *unix_dn;
1220
1221         utf8_dn = ldap_get_dn(ld, entry);
1222         if (!utf8_dn) {
1223                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1224                 return NULL;
1225         }
1226         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1227                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1228                 return NULL;
1229         }
1230         ldap_memfree(utf8_dn);
1231         return unix_dn;
1232 }