source4/cldap_server/netlogon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    CLDAP server - netlogon handling
   5
   6    Copyright (C) Andrew Tridgell        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "lib/ldb/include/ldb.h"
  24 #include "lib/ldb/include/ldb_errors.h"
  25 #include "lib/events/events.h"
  26 #include "lib/socket/socket.h"
  27 #include "smbd/service_task.h"
  28 #include "cldap_server/cldap_server.h"
  29 #include "librpc/gen_ndr/ndr_misc.h"
  30 #include "libcli/ldap/ldap_ndr.h"
  31 #include "dsdb/samdb/samdb.h"
  32 #include "auth/auth.h"
  33 #include "ldb_wrap.h"
  34 #include "system/network.h"
  35 #include "lib/socket/netif.h"
  36 #include "param/param.h"
  37
  38 /*
  39   fill in the cldap netlogon union for a given version
  40 */
  41 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  42                                      TALLOC_CTX *mem_ctx,
  43                                      const char *domain,
  44                                      const char *domain_guid,
  45                                      const char *user,
  46                                      const char *src_address,
  47                                      uint32_t version,
  48                                      struct loadparm_context *lp_ctx,
  49                                      union nbt_cldap_netlogon *netlogon)
  50 {
  51         const char *ref_attrs[] = {"nETBIOSName", "dnsRoot", "ncName", NULL};
  52         const char *dom_attrs[] = {"objectGUID", NULL};
  53         struct ldb_result *ref_res = NULL, *dom_res = NULL;
  54         int ret;
  55         const char **services = lp_server_services(lp_ctx);
  56         uint32_t server_type;
  57         const char *pdc_name;
  58         struct GUID domain_uuid;
  59         const char *realm;
  60         const char *dns_domain;
  61         const char *pdc_dns_name;
  62         const char *flatname;
  63         const char *server_site;
  64         const char *client_site;
  65         const char *pdc_ip;
  66         struct ldb_dn *partitions_basedn;
  67         struct interface *ifaces;
  68
  69         partitions_basedn = samdb_partitions_dn(cldapd->samctx, mem_ctx);
  70
  71         /* the domain has an optional trailing . */
  72         if (domain && domain[strlen(domain)-1] == '.') {
  73                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  74         }
  75
  76         if (domain) {
  77                 struct ldb_dn *dom_dn;
  78                 /* try and find the domain */
  79
  80                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
  81                                          partitions_basedn, LDB_SCOPE_ONELEVEL,
  82                                          ref_attrs,
  83                                          "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  84                                          domain);
  85
  86                 if (ret != LDB_SUCCESS) {
  87                         DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
  88                                  domain,
  89                                  ldb_errstring(cldapd->samctx)));
  90                         return NT_STATUS_NO_SUCH_DOMAIN;
  91                 } else if (ref_res->count == 1) {
  92                         talloc_steal(mem_ctx, dom_res);
  93                         dom_dn = ldb_msg_find_attr_as_dn(cldapd->samctx, mem_ctx, ref_res->msgs[0], "ncName");
  94                         if (!dom_dn) {
  95                                 return NT_STATUS_NO_SUCH_DOMAIN;
  96                         }
  97                         ret = ldb_search(cldapd->samctx, dom_dn,
  98                                          LDB_SCOPE_BASE, "objectClass=domain",
  99                                          dom_attrs, &dom_res);
 100                         if (ret != LDB_SUCCESS) {
 101                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(cldapd->samctx)));
 102                                 return NT_STATUS_NO_SUCH_DOMAIN;
 103                         }
 104                         talloc_steal(mem_ctx, dom_res);
 105                         if (dom_res->count != 1) {
 106                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
 107                                 return NT_STATUS_NO_SUCH_DOMAIN;
 108                         }
 109                 } else if (ref_res->count > 1) {
 110                         talloc_free(ref_res);
 111                         return NT_STATUS_NO_SUCH_DOMAIN;
 112                 }
 113         }
 114
 115         if ((dom_res == NULL || dom_res->count == 0) && domain_guid) {
 116                 ref_res = NULL;
 117
 118                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &dom_res,
 119                                  NULL, LDB_SCOPE_SUBTREE,
 120                                  dom_attrs,
 121                                  "(&(objectClass=domainDNS)(objectGUID=%s))",
 122                                  domain_guid);
 123
 124                 if (ret != LDB_SUCCESS) {
 125                         DEBUG(2,("Unable to find referece to GUID '%s' in sam: %s\n",
 126                                  domain_guid,
 127                                  ldb_errstring(cldapd->samctx)));
 128                         return NT_STATUS_NO_SUCH_DOMAIN;
 129                 } else if (dom_res->count == 1) {
 130                         /* try and find the domain */
 131                         ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
 132                                                  partitions_basedn, LDB_SCOPE_ONELEVEL,
 133                                                  ref_attrs,
 134                                                  "(&(objectClass=crossRef)(ncName=%s))",
 135                                                  ldb_dn_get_linearized(dom_res->msgs[0]->dn));
 136
 137                         if (ret != LDB_SUCCESS) {
 138                                 DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
 139                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn),
 140                                          ldb_errstring(cldapd->samctx)));
 141                                 return NT_STATUS_NO_SUCH_DOMAIN;
 142
 143                         } else if (ref_res->count != 1) {
 144                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 145                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn)));
 146                                 return NT_STATUS_NO_SUCH_DOMAIN;
 147                         }
 148                 } else if (dom_res->count > 1) {
 149                         talloc_free(ref_res);
 150                         return NT_STATUS_NO_SUCH_DOMAIN;
 151                 }
 152         }
 153
 154         if ((ref_res == NULL || ref_res->count == 0)) {
 155                 DEBUG(2,("Unable to find domain reference with name %s or GUID {%s}\n", domain, domain_guid));
 156                 return NT_STATUS_NO_SUCH_DOMAIN;
 157         }
 158
 159         if ((dom_res == NULL || dom_res->count == 0)) {
 160                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 161                 return NT_STATUS_NO_SUCH_DOMAIN;
 162         }
 163
 164         server_type      =
 165                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 166                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 167                 NBT_SERVER_GOOD_TIMESERV;
 168
 169         if (samdb_is_pdc(cldapd->samctx)) {
 170                 server_type |= NBT_SERVER_PDC;
 171         }
 172
 173         if (samdb_is_gc(cldapd->samctx)) {
 174                 server_type |= NBT_SERVER_GC;
 175         }
 176
 177         if (str_list_check(services, "ldap")) {
 178                 server_type |= NBT_SERVER_LDAP;
 179         }
 180
 181         if (str_list_check(services, "kdc")) {
 182                 server_type |= NBT_SERVER_KDC;
 183         }
 184
 185         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(lp_ctx));
 186         domain_uuid      = samdb_result_guid(dom_res->msgs[0], "objectGUID");
 187         realm            = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 188         dns_domain       = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 189         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 190                                            strlower_talloc(mem_ctx,
 191                                                            lp_netbios_name(lp_ctx)),
 192                                            dns_domain);
 193
 194         flatname         = samdb_result_string(ref_res->msgs[0], "nETBIOSName",
 195                                                lp_workgroup(lp_ctx));
 196         server_site      = "Default-First-Site-Name";
 197         client_site      = "Default-First-Site-Name";
 198         load_interfaces(mem_ctx, lp_interfaces(lp_ctx), &ifaces);
 199         pdc_ip           = iface_best_ip(ifaces, src_address);
 200
 201         ZERO_STRUCTP(netlogon);
 202
 203         switch (version & 0xF) {
 204         case 0:
 205         case 1:
 206                 netlogon->logon1.type        = (user?19+2:19);
 207                 netlogon->logon1.pdc_name    = pdc_name;
 208                 netlogon->logon1.user_name   = user;
 209                 netlogon->logon1.domain_name = flatname;
 210                 netlogon->logon1.nt_version  = 1;
 211                 netlogon->logon1.lmnt_token  = 0xFFFF;
 212                 netlogon->logon1.lm20_token  = 0xFFFF;
 213                 break;
 214         case 2:
 215         case 3:
 216                 netlogon->logon3.type         = (user?19+2:19);
 217                 netlogon->logon3.pdc_name     = pdc_name;
 218                 netlogon->logon3.user_name    = user;
 219                 netlogon->logon3.domain_name  = flatname;
 220                 netlogon->logon3.domain_uuid  = domain_uuid;
 221                 netlogon->logon3.forest       = realm;
 222                 netlogon->logon3.dns_domain   = dns_domain;
 223                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 224                 netlogon->logon3.pdc_ip       = pdc_ip;
 225                 netlogon->logon3.server_type  = server_type;
 226                 netlogon->logon3.lmnt_token   = 0xFFFF;
 227                 netlogon->logon3.lm20_token   = 0xFFFF;
 228                 break;
 229         case 4:
 230         case 5:
 231         case 6:
 232         case 7:
 233                 netlogon->logon5.type         = (user?NETLOGON_RESPONSE_FROM_PDC_USER:NETLOGON_RESPONSE_FROM_PDC2);
 234                 netlogon->logon5.server_type  = server_type;
 235                 netlogon->logon5.domain_uuid  = domain_uuid;
 236                 netlogon->logon5.forest       = realm;
 237                 netlogon->logon5.dns_domain   = dns_domain;
 238                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 239                 netlogon->logon5.domain       = flatname;
 240                 netlogon->logon5.pdc_name     = lp_netbios_name(lp_ctx);
 241                 netlogon->logon5.user_name    = user;
 242                 netlogon->logon5.server_site  = server_site;
 243                 netlogon->logon5.client_site  = client_site;
 244                 netlogon->logon5.lmnt_token   = 0xFFFF;
 245                 netlogon->logon5.lm20_token   = 0xFFFF;
 246                 break;
 247         default:
 248                 netlogon->logon13.type         = (user?NETLOGON_RESPONSE_FROM_PDC_USER:NETLOGON_RESPONSE_FROM_PDC2);
 249                 netlogon->logon13.server_type  = server_type;
 250                 netlogon->logon13.domain_uuid  = domain_uuid;
 251                 netlogon->logon13.forest       = realm;
 252                 netlogon->logon13.dns_domain   = dns_domain;
 253                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 254                 netlogon->logon13.domain       = flatname;
 255                 netlogon->logon13.pdc_name     = lp_netbios_name(lp_ctx);
 256                 netlogon->logon13.user_name    = user;
 257                 netlogon->logon13.server_site  = server_site;
 258                 netlogon->logon13.client_site  = client_site;
 259                 netlogon->logon13.unknown      = 10;
 260                 netlogon->logon13.unknown2     = 2;
 261                 netlogon->logon13.pdc_ip       = pdc_ip;
 262                 netlogon->logon13.lmnt_token   = 0xFFFF;
 263                 netlogon->logon13.lm20_token   = 0xFFFF;
 264                 break;
 265         }
 266
 267         return NT_STATUS_OK;
 268 }
 269
 270
 271 /*
 272   handle incoming cldap requests
 273 */
 274 void cldapd_netlogon_request(struct cldap_socket *cldap,
 275                              uint32_t message_id,
 276                              struct ldb_parse_tree *tree,
 277                              struct socket_address *src)
 278 {
 279         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 280         int i;
 281         const char *domain = NULL;
 282         const char *host = NULL;
 283         const char *user = NULL;
 284         const char *domain_guid = NULL;
 285         const char *domain_sid = NULL;
 286         int acct_control = -1;
 287         int version = -1;
 288         union nbt_cldap_netlogon netlogon;
 289         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 290
 291         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 292
 293         if (tree->operation != LDB_OP_AND) goto failed;
 294
 295         /* extract the query elements */
 296         for (i=0;i<tree->u.list.num_elements;i++) {
 297                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 298                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 299                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 300                         domain = talloc_strndup(tmp_ctx,
 301                                                 (const char *)t->u.equality.value.data,
 302                                                 t->u.equality.value.length);
 303                 }
 304                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 305                         host = talloc_strndup(tmp_ctx,
 306                                               (const char *)t->u.equality.value.data,
 307                                               t->u.equality.value.length);
 308                 }
 309                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 310                         NTSTATUS enc_status;
 311                         struct GUID guid;
 312                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 313                                                           t->u.equality.value, &guid);
 314                         if (NT_STATUS_IS_OK(enc_status)) {
 315                                 domain_guid = GUID_string(tmp_ctx, &guid);
 316                         }
 317                 }
 318                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 319                         domain_sid = talloc_strndup(tmp_ctx,
 320                                                     (const char *)t->u.equality.value.data,
 321                                                     t->u.equality.value.length);
 322                 }
 323                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 324                         user = talloc_strndup(tmp_ctx,
 325                                               (const char *)t->u.equality.value.data,
 326                                               t->u.equality.value.length);
 327                 }
 328                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 329                     t->u.equality.value.length == 4) {
 330                         version = IVAL(t->u.equality.value.data, 0);
 331                 }
 332                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 333                     t->u.equality.value.length == 4) {
 334                         acct_control = IVAL(t->u.equality.value.data, 0);
 335                 }
 336         }
 337
 338         if (domain_guid == NULL && domain == NULL) {
 339                 domain = lp_realm(cldapd->task->lp_ctx);
 340         }
 341
 342         if (version == -1) {
 343                 goto failed;
 344         }
 345
 346         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 347                  domain, host, user, version, domain_guid));
 348
 349         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 350                                       user, src->addr,
 351                                       version, cldapd->task->lp_ctx, &netlogon);
 352         if (!NT_STATUS_IS_OK(status)) {
 353                 goto failed;
 354         }
 355
 356         status = cldap_netlogon_reply(cldap, message_id, src, version,
 357                                       &netlogon);
 358         if (!NT_STATUS_IS_OK(status)) {
 359                 goto failed;
 360         }
 361
 362         talloc_free(tmp_ctx);
 363         return;
 364
 365 failed:
 366         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 367                  domain, host, version, nt_errstr(status)));
 368         talloc_free(tmp_ctx);
 369         cldap_empty_reply(cldap, message_id, src);
 370 }