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.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                                      union nbt_cldap_netlogon *netlogon)
  49 {
  50         const char *ref_attrs[] = {"nETBIOSName", "dnsRoot", "ncName", NULL};
  51         const char *dom_attrs[] = {"objectGUID", NULL};
  52         struct ldb_result *ref_res = NULL, *dom_res = NULL;
  53         int ret;
  54         const char **services = lp_server_services(global_loadparm);
  55         uint32_t server_type;
  56         const char *pdc_name;
  57         struct GUID domain_uuid;
  58         const char *realm;
  59         const char *dns_domain;
  60         const char *pdc_dns_name;
  61         const char *flatname;
  62         const char *server_site;
  63         const char *client_site;
  64         const char *pdc_ip;
  65         struct ldb_dn *partitions_basedn;
  66
  67         partitions_basedn = samdb_partitions_dn(cldapd->samctx, mem_ctx);
  68
  69         /* the domain has an optional trailing . */
  70         if (domain && domain[strlen(domain)-1] == '.') {
  71                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  72         }
  73
  74         if (domain) {
  75                 struct ldb_dn *dom_dn;
  76                 /* try and find the domain */
  77
  78                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
  79                                          partitions_basedn, LDB_SCOPE_ONELEVEL,
  80                                          ref_attrs,
  81                                          "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  82                                          domain);
  83
  84                 if (ret != LDB_SUCCESS) {
  85                         DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
  86                                  domain,
  87                                  ldb_errstring(cldapd->samctx)));
  88                         return NT_STATUS_NO_SUCH_DOMAIN;
  89                 } else if (ref_res->count == 1) {
  90                         talloc_steal(mem_ctx, dom_res);
  91                         dom_dn = ldb_msg_find_attr_as_dn(cldapd->samctx, mem_ctx, ref_res->msgs[0], "ncName");
  92                         if (!dom_dn) {
  93                                 return NT_STATUS_NO_SUCH_DOMAIN;
  94                         }
  95                         ret = ldb_search(cldapd->samctx, dom_dn,
  96                                          LDB_SCOPE_BASE, "objectClass=domain",
  97                                          dom_attrs, &dom_res);
  98                         if (ret != LDB_SUCCESS) {
  99                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(cldapd->samctx)));
 100                                 return NT_STATUS_NO_SUCH_DOMAIN;
 101                         }
 102                         talloc_steal(mem_ctx, dom_res);
 103                         if (dom_res->count != 1) {
 104                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
 105                                 return NT_STATUS_NO_SUCH_DOMAIN;
 106                         }
 107                 } else if (ref_res->count > 1) {
 108                         talloc_free(ref_res);
 109                         return NT_STATUS_NO_SUCH_DOMAIN;
 110                 }
 111         }
 112
 113         if ((dom_res == NULL || dom_res->count == 0) && domain_guid) {
 114                 ref_res = NULL;
 115
 116                 ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &dom_res,
 117                                  NULL, LDB_SCOPE_SUBTREE,
 118                                  dom_attrs,
 119                                  "(&(objectClass=domainDNS)(objectGUID=%s))",
 120                                  domain_guid);
 121
 122                 if (ret != LDB_SUCCESS) {
 123                         DEBUG(2,("Unable to find referece to GUID '%s' in sam: %s\n",
 124                                  domain_guid,
 125                                  ldb_errstring(cldapd->samctx)));
 126                         return NT_STATUS_NO_SUCH_DOMAIN;
 127                 } else if (dom_res->count == 1) {
 128                         /* try and find the domain */
 129                         ret = ldb_search_exp_fmt(cldapd->samctx, mem_ctx, &ref_res,
 130                                                  partitions_basedn, LDB_SCOPE_ONELEVEL,
 131                                                  ref_attrs,
 132                                                  "(&(objectClass=crossRef)(ncName=%s))",
 133                                                  ldb_dn_get_linearized(dom_res->msgs[0]->dn));
 134
 135                         if (ret != LDB_SUCCESS) {
 136                                 DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
 137                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn),
 138                                          ldb_errstring(cldapd->samctx)));
 139                                 return NT_STATUS_NO_SUCH_DOMAIN;
 140
 141                         } else if (ref_res->count != 1) {
 142                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 143                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn)));
 144                                 return NT_STATUS_NO_SUCH_DOMAIN;
 145                         }
 146                 } else if (dom_res->count > 1) {
 147                         talloc_free(ref_res);
 148                         return NT_STATUS_NO_SUCH_DOMAIN;
 149                 }
 150         }
 151
 152         if ((ref_res == NULL || ref_res->count == 0)) {
 153                 DEBUG(2,("Unable to find domain reference with name %s or GUID {%s}\n", domain, domain_guid));
 154                 return NT_STATUS_NO_SUCH_DOMAIN;
 155         }
 156
 157         if ((dom_res == NULL || dom_res->count == 0)) {
 158                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 159                 return NT_STATUS_NO_SUCH_DOMAIN;
 160         }
 161
 162         server_type      =
 163                 NBT_SERVER_PDC | NBT_SERVER_GC |
 164                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 165                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 166                 NBT_SERVER_GOOD_TIMESERV;
 167
 168         if (str_list_check(services, "ldap")) {
 169                 server_type |= NBT_SERVER_LDAP;
 170         }
 171
 172         if (str_list_check(services, "kdc")) {
 173                 server_type |= NBT_SERVER_KDC;
 174         }
 175
 176         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(global_loadparm));
 177         domain_uuid      = samdb_result_guid(dom_res->msgs[0], "objectGUID");
 178         realm            = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(global_loadparm));
 179         dns_domain       = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(global_loadparm));
 180         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 181                                            strlower_talloc(mem_ctx,
 182                                                            lp_netbios_name(global_loadparm)),
 183                                            dns_domain);
 184
 185         flatname         = samdb_result_string(ref_res->msgs[0], "nETBIOSName",
 186                                                lp_workgroup(global_loadparm));
 187         server_site      = "Default-First-Site-Name";
 188         client_site      = "Default-First-Site-Name";
 189         pdc_ip           = iface_best_ip(src_address);
 190
 191         ZERO_STRUCTP(netlogon);
 192
 193         switch (version & 0xF) {
 194         case 0:
 195         case 1:
 196                 netlogon->logon1.type        = (user?19+2:19);
 197                 netlogon->logon1.pdc_name    = pdc_name;
 198                 netlogon->logon1.user_name   = user;
 199                 netlogon->logon1.domain_name = flatname;
 200                 netlogon->logon1.nt_version  = 1;
 201                 netlogon->logon1.lmnt_token  = 0xFFFF;
 202                 netlogon->logon1.lm20_token  = 0xFFFF;
 203                 break;
 204         case 2:
 205         case 3:
 206                 netlogon->logon3.type         = (user?19+2:19);
 207                 netlogon->logon3.pdc_name     = pdc_name;
 208                 netlogon->logon3.user_name    = user;
 209                 netlogon->logon3.domain_name  = flatname;
 210                 netlogon->logon3.domain_uuid  = domain_uuid;
 211                 netlogon->logon3.forest       = realm;
 212                 netlogon->logon3.dns_domain   = dns_domain;
 213                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 214                 netlogon->logon3.pdc_ip       = pdc_ip;
 215                 netlogon->logon3.server_type  = server_type;
 216                 netlogon->logon3.lmnt_token   = 0xFFFF;
 217                 netlogon->logon3.lm20_token   = 0xFFFF;
 218                 break;
 219         case 4:
 220         case 5:
 221         case 6:
 222         case 7:
 223                 netlogon->logon5.type         = (user?23+2:23);
 224                 netlogon->logon5.server_type  = server_type;
 225                 netlogon->logon5.domain_uuid  = domain_uuid;
 226                 netlogon->logon5.forest       = realm;
 227                 netlogon->logon5.dns_domain   = dns_domain;
 228                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 229                 netlogon->logon5.domain       = flatname;
 230                 netlogon->logon5.pdc_name     = lp_netbios_name(global_loadparm);
 231                 netlogon->logon5.user_name    = user;
 232                 netlogon->logon5.server_site  = server_site;
 233                 netlogon->logon5.client_site  = client_site;
 234                 netlogon->logon5.lmnt_token   = 0xFFFF;
 235                 netlogon->logon5.lm20_token   = 0xFFFF;
 236                 break;
 237         default:
 238                 netlogon->logon13.type         = (user?23+2:23);
 239                 netlogon->logon13.server_type  = server_type;
 240                 netlogon->logon13.domain_uuid  = domain_uuid;
 241                 netlogon->logon13.forest       = realm;
 242                 netlogon->logon13.dns_domain   = dns_domain;
 243                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 244                 netlogon->logon13.domain       = flatname;
 245                 netlogon->logon13.pdc_name     = lp_netbios_name(global_loadparm);
 246                 netlogon->logon13.user_name    = user;
 247                 netlogon->logon13.server_site  = server_site;
 248                 netlogon->logon13.client_site  = client_site;
 249                 netlogon->logon13.unknown      = 10;
 250                 netlogon->logon13.unknown2     = 2;
 251                 netlogon->logon13.pdc_ip       = pdc_ip;
 252                 netlogon->logon13.lmnt_token   = 0xFFFF;
 253                 netlogon->logon13.lm20_token   = 0xFFFF;
 254                 break;
 255         }
 256
 257         return NT_STATUS_OK;
 258 }
 259
 260
 261 /*
 262   handle incoming cldap requests
 263 */
 264 void cldapd_netlogon_request(struct cldap_socket *cldap,
 265                              uint32_t message_id,
 266                              struct ldb_parse_tree *tree,
 267                              struct socket_address *src)
 268 {
 269         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 270         int i;
 271         const char *domain = NULL;
 272         const char *host = NULL;
 273         const char *user = NULL;
 274         const char *domain_guid = NULL;
 275         const char *domain_sid = NULL;
 276         int acct_control = -1;
 277         int version = -1;
 278         union nbt_cldap_netlogon netlogon;
 279         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 280
 281         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 282
 283         if (tree->operation != LDB_OP_AND) goto failed;
 284
 285         /* extract the query elements */
 286         for (i=0;i<tree->u.list.num_elements;i++) {
 287                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 288                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 289                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 290                         domain = talloc_strndup(tmp_ctx,
 291                                                 (const char *)t->u.equality.value.data,
 292                                                 t->u.equality.value.length);
 293                 }
 294                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 295                         host = talloc_strndup(tmp_ctx,
 296                                               (const char *)t->u.equality.value.data,
 297                                               t->u.equality.value.length);
 298                 }
 299                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 300                         NTSTATUS enc_status;
 301                         struct GUID guid;
 302                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 303                                                           t->u.equality.value, &guid);
 304                         if (NT_STATUS_IS_OK(enc_status)) {
 305                                 domain_guid = GUID_string(tmp_ctx, &guid);
 306                         }
 307                 }
 308                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 309                         domain_sid = talloc_strndup(tmp_ctx,
 310                                                     (const char *)t->u.equality.value.data,
 311                                                     t->u.equality.value.length);
 312                 }
 313                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 314                         user = talloc_strndup(tmp_ctx,
 315                                               (const char *)t->u.equality.value.data,
 316                                               t->u.equality.value.length);
 317                 }
 318                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 319                     t->u.equality.value.length == 4) {
 320                         version = IVAL(t->u.equality.value.data, 0);
 321                 }
 322                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 323                     t->u.equality.value.length == 4) {
 324                         acct_control = IVAL(t->u.equality.value.data, 0);
 325                 }
 326         }
 327
 328         if (domain_guid == NULL && domain == NULL) {
 329                 domain = lp_realm(global_loadparm);
 330         }
 331
 332         if (version == -1) {
 333                 goto failed;
 334         }
 335
 336         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 337                  domain, host, user, version, domain_guid));
 338
 339         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 340                                       user, src->addr,
 341                                       version, &netlogon);
 342         if (!NT_STATUS_IS_OK(status)) {
 343                 goto failed;
 344         }
 345
 346         status = cldap_netlogon_reply(cldap, message_id, src, version,
 347                                       &netlogon);
 348         if (!NT_STATUS_IS_OK(status)) {
 349                 goto failed;
 350         }
 351
 352         talloc_free(tmp_ctx);
 353         return;
 354
 355 failed:
 356         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 357                  domain, host, version, nt_errstr(status)));
 358         talloc_free(tmp_ctx);
 359         cldap_empty_reply(cldap, message_id, src);
 360 }