source/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 "libcli/ldap/ldap_ndr.h"
  24 #include "lib/ldb/include/ldb.h"
  25 #include "lib/ldb/include/ldb_errors.h"
  26 #include "lib/events/events.h"
  27 #include "lib/socket/socket.h"
  28 #include "smbd/service_task.h"
  29 #include "cldap_server/cldap_server.h"
  30 #include "librpc/gen_ndr/ndr_misc.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
  68         partitions_basedn = samdb_partitions_dn(cldapd->samctx, mem_ctx);
  69
  70         /* the domain has an optional trailing . */
  71         if (domain && domain[strlen(domain)-1] == '.') {
  72                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  73         }
  74
  75         if (domain) {
  76                 struct ldb_dn *dom_dn;
  77                 /* try and find the domain */
  78
  79                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
  80                                          partitions_basedn, LDB_SCOPE_ONELEVEL,
  81                                          ref_attrs,
  82                                          "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  83                                          domain);
  84
  85                 if (ret != LDB_SUCCESS) {
  86                         DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
  87                                  domain,
  88                                  ldb_errstring(cldapd->samctx)));
  89                         return NT_STATUS_NO_SUCH_DOMAIN;
  90                 } else if (ref_res->count == 1) {
  91                         talloc_steal(mem_ctx, dom_res);
  92                         dom_dn = ldb_msg_find_attr_as_dn(cldapd->samctx, mem_ctx, ref_res->msgs[0], "ncName");
  93                         if (!dom_dn) {
  94                                 return NT_STATUS_NO_SUCH_DOMAIN;
  95                         }
  96                         ret = ldb_search(cldapd->samctx, dom_dn,
  97                                          LDB_SCOPE_BASE, "objectClass=domain",
  98                                          dom_attrs, &dom_res);
  99                         if (ret != LDB_SUCCESS) {
 100                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(cldapd->samctx)));
 101                                 return NT_STATUS_NO_SUCH_DOMAIN;
 102                         }
 103                         talloc_steal(mem_ctx, dom_res);
 104                         if (dom_res->count != 1) {
 105                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
 106                                 return NT_STATUS_NO_SUCH_DOMAIN;
 107                         }
 108                 } else if (ref_res->count > 1) {
 109                         talloc_free(ref_res);
 110                         return NT_STATUS_NO_SUCH_DOMAIN;
 111                 }
 112         }
 113
 114         if ((dom_res == NULL || dom_res->count == 0) && domain_guid) {
 115                 ref_res = NULL;
 116
 117                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &dom_res,
 118                                  NULL, LDB_SCOPE_SUBTREE,
 119                                  dom_attrs,
 120                                  "(&(objectClass=domainDNS)(objectGUID=%s))",
 121                                  domain_guid);
 122
 123                 if (ret != LDB_SUCCESS) {
 124                         DEBUG(2,("Unable to find referece to GUID '%s' in sam: %s\n",
 125                                  domain_guid,
 126                                  ldb_errstring(cldapd->samctx)));
 127                         return NT_STATUS_NO_SUCH_DOMAIN;
 128                 } else if (dom_res->count == 1) {
 129                         /* try and find the domain */
 130                         ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
 131                                                  partitions_basedn, LDB_SCOPE_ONELEVEL,
 132                                                  ref_attrs,
 133                                                  "(&(objectClass=crossRef)(ncName=%s))",
 134                                                  ldb_dn_get_linearized(dom_res->msgs[0]->dn));
 135
 136                         if (ret != LDB_SUCCESS) {
 137                                 DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
 138                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn),
 139                                          ldb_errstring(cldapd->samctx)));
 140                                 return NT_STATUS_NO_SUCH_DOMAIN;
 141
 142                         } else if (ref_res->count != 1) {
 143                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 144                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn)));
 145                                 return NT_STATUS_NO_SUCH_DOMAIN;
 146                         }
 147                 } else if (dom_res->count > 1) {
 148                         talloc_free(ref_res);
 149                         return NT_STATUS_NO_SUCH_DOMAIN;
 150                 }
 151         }
 152
 153         if ((ref_res == NULL || ref_res->count == 0)) {
 154                 DEBUG(2,("Unable to find domain reference with name %s or GUID {%s}\n", domain, domain_guid));
 155                 return NT_STATUS_NO_SUCH_DOMAIN;
 156         }
 157
 158         if ((dom_res == NULL || dom_res->count == 0)) {
 159                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 160                 return NT_STATUS_NO_SUCH_DOMAIN;
 161         }
 162
 163         server_type      =
 164                 NBT_SERVER_PDC | NBT_SERVER_GC |
 165                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 166                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 167                 NBT_SERVER_GOOD_TIMESERV;
 168
 169         if (str_list_check(services, "ldap")) {
 170                 server_type |= NBT_SERVER_LDAP;
 171         }
 172
 173         if (str_list_check(services, "kdc")) {
 174                 server_type |= NBT_SERVER_KDC;
 175         }
 176
 177         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(lp_ctx));
 178         domain_uuid      = samdb_result_guid(dom_res->msgs[0], "objectGUID");
 179         realm            = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 180         dns_domain       = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 181         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 182                                            strlower_talloc(mem_ctx,
 183                                                            lp_netbios_name(lp_ctx)),
 184                                            dns_domain);
 185
 186         flatname         = samdb_result_string(ref_res->msgs[0], "nETBIOSName",
 187                                                lp_workgroup(lp_ctx));
 188         server_site      = "Default-First-Site-Name";
 189         client_site      = "Default-First-Site-Name";
 190         pdc_ip           = iface_best_ip(lp_ctx, src_address);
 191
 192         ZERO_STRUCTP(netlogon);
 193
 194         switch (version & 0xF) {
 195         case 0:
 196         case 1:
 197                 netlogon->logon1.type        = (user?19+2:19);
 198                 netlogon->logon1.pdc_name    = pdc_name;
 199                 netlogon->logon1.user_name   = user;
 200                 netlogon->logon1.domain_name = flatname;
 201                 netlogon->logon1.nt_version  = 1;
 202                 netlogon->logon1.lmnt_token  = 0xFFFF;
 203                 netlogon->logon1.lm20_token  = 0xFFFF;
 204                 break;
 205         case 2:
 206         case 3:
 207                 netlogon->logon3.type         = (user?19+2:19);
 208                 netlogon->logon3.pdc_name     = pdc_name;
 209                 netlogon->logon3.user_name    = user;
 210                 netlogon->logon3.domain_name  = flatname;
 211                 netlogon->logon3.domain_uuid  = domain_uuid;
 212                 netlogon->logon3.forest       = realm;
 213                 netlogon->logon3.dns_domain   = dns_domain;
 214                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 215                 netlogon->logon3.pdc_ip       = pdc_ip;
 216                 netlogon->logon3.server_type  = server_type;
 217                 netlogon->logon3.lmnt_token   = 0xFFFF;
 218                 netlogon->logon3.lm20_token   = 0xFFFF;
 219                 break;
 220         case 4:
 221         case 5:
 222         case 6:
 223         case 7:
 224                 netlogon->logon5.type         = (user?23+2:23);
 225                 netlogon->logon5.server_type  = server_type;
 226                 netlogon->logon5.domain_uuid  = domain_uuid;
 227                 netlogon->logon5.forest       = realm;
 228                 netlogon->logon5.dns_domain   = dns_domain;
 229                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 230                 netlogon->logon5.domain       = flatname;
 231                 netlogon->logon5.pdc_name     = lp_netbios_name(lp_ctx);
 232                 netlogon->logon5.user_name    = user;
 233                 netlogon->logon5.server_site  = server_site;
 234                 netlogon->logon5.client_site  = client_site;
 235                 netlogon->logon5.lmnt_token   = 0xFFFF;
 236                 netlogon->logon5.lm20_token   = 0xFFFF;
 237                 break;
 238         default:
 239                 netlogon->logon13.type         = (user?23+2:23);
 240                 netlogon->logon13.server_type  = server_type;
 241                 netlogon->logon13.domain_uuid  = domain_uuid;
 242                 netlogon->logon13.forest       = realm;
 243                 netlogon->logon13.dns_domain   = dns_domain;
 244                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 245                 netlogon->logon13.domain       = flatname;
 246                 netlogon->logon13.pdc_name     = lp_netbios_name(lp_ctx);
 247                 netlogon->logon13.user_name    = user;
 248                 netlogon->logon13.server_site  = server_site;
 249                 netlogon->logon13.client_site  = client_site;
 250                 netlogon->logon13.unknown      = 10;
 251                 netlogon->logon13.unknown2     = 2;
 252                 netlogon->logon13.pdc_ip       = pdc_ip;
 253                 netlogon->logon13.lmnt_token   = 0xFFFF;
 254                 netlogon->logon13.lm20_token   = 0xFFFF;
 255                 break;
 256         }
 257
 258         return NT_STATUS_OK;
 259 }
 260
 261
 262 /*
 263   handle incoming cldap requests
 264 */
 265 void cldapd_netlogon_request(struct cldap_socket *cldap,
 266                              uint32_t message_id,
 267                              struct ldb_parse_tree *tree,
 268                              struct socket_address *src)
 269 {
 270         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 271         int i;
 272         const char *domain = NULL;
 273         const char *host = NULL;
 274         const char *user = NULL;
 275         const char *domain_guid = NULL;
 276         const char *domain_sid = NULL;
 277         int acct_control = -1;
 278         int version = -1;
 279         union nbt_cldap_netlogon netlogon;
 280         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 281
 282         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 283
 284         if (tree->operation != LDB_OP_AND) goto failed;
 285
 286         /* extract the query elements */
 287         for (i=0;i<tree->u.list.num_elements;i++) {
 288                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 289                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 290                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 291                         domain = talloc_strndup(tmp_ctx,
 292                                                 (const char *)t->u.equality.value.data,
 293                                                 t->u.equality.value.length);
 294                 }
 295                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 296                         host = talloc_strndup(tmp_ctx,
 297                                               (const char *)t->u.equality.value.data,
 298                                               t->u.equality.value.length);
 299                 }
 300                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 301                         NTSTATUS enc_status;
 302                         struct GUID guid;
 303                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 304                                                           t->u.equality.value, &guid);
 305                         if (NT_STATUS_IS_OK(enc_status)) {
 306                                 domain_guid = GUID_string(tmp_ctx, &guid);
 307                         }
 308                 }
 309                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 310                         domain_sid = talloc_strndup(tmp_ctx,
 311                                                     (const char *)t->u.equality.value.data,
 312                                                     t->u.equality.value.length);
 313                 }
 314                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 315                         user = talloc_strndup(tmp_ctx,
 316                                               (const char *)t->u.equality.value.data,
 317                                               t->u.equality.value.length);
 318                 }
 319                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 320                     t->u.equality.value.length == 4) {
 321                         version = IVAL(t->u.equality.value.data, 0);
 322                 }
 323                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 324                     t->u.equality.value.length == 4) {
 325                         acct_control = IVAL(t->u.equality.value.data, 0);
 326                 }
 327         }
 328
 329         if (domain_guid == NULL && domain == NULL) {
 330                 domain = lp_realm(cldapd->task->lp_ctx);
 331         }
 332
 333         if (version == -1) {
 334                 goto failed;
 335         }
 336
 337         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 338                  domain, host, user, version, domain_guid));
 339
 340         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 341                                       user, src->addr,
 342                                       version, cldapd->task->lp_ctx, &netlogon);
 343         if (!NT_STATUS_IS_OK(status)) {
 344                 goto failed;
 345         }
 346
 347         status = cldap_netlogon_reply(cldap, message_id, src, version,
 348                                       &netlogon);
 349         if (!NT_STATUS_IS_OK(status)) {
 350                 goto failed;
 351         }
 352
 353         talloc_free(tmp_ctx);
 354         return;
 355
 356 failed:
 357         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 358                  domain, host, version, nt_errstr(status)));
 359         talloc_free(tmp_ctx);
 360         cldap_empty_reply(cldap, message_id, src);
 361 }