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    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.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 "libcli/ldap/ldap_ndr.h"
  32 #include "libcli/security/security.h"
  33 #include "dsdb/samdb/samdb.h"
  34 #include "auth/auth.h"
  35 #include "ldb_wrap.h"
  36 #include "system/network.h"
  37 #include "lib/socket/netif.h"
  38 #include "param/param.h"
  39 /*
  40   fill in the cldap netlogon union for a given version
  41 */
  42 NTSTATUS fill_netlogon_samlogon_response(struct ldb_context *sam_ctx,
  43                                          TALLOC_CTX *mem_ctx,
  44                                          const char *domain,
  45                                          const char *netbios_domain,
  46                                          struct dom_sid *domain_sid,
  47                                          const char *domain_guid,
  48                                          const char *user,
  49                                          const char *src_address,
  50                                          uint32_t version,
  51                                          struct loadparm_context *lp_ctx,
  52                                          struct netlogon_samlogon_response *netlogon)
  53 {
  54         const char *ref_attrs[] = {"nETBIOSName", "dnsRoot", "ncName", NULL};
  55         const char *dom_attrs[] = {"objectGUID", NULL};
  56         struct ldb_result *ref_res = NULL, *dom_res = NULL;
  57         int ret;
  58         const char **services = lp_server_services(lp_ctx);
  59         uint32_t server_type;
  60         const char *pdc_name;
  61         struct GUID domain_uuid;
  62         const char *realm;
  63         const char *dns_domain;
  64         const char *pdc_dns_name;
  65         const char *flatname;
  66         const char *server_site;
  67         const char *client_site;
  68         const char *pdc_ip;
  69         struct ldb_dn *partitions_basedn;
  70         struct interface *ifaces;
  71
  72         partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
  73
  74         /* the domain has an optional trailing . */
  75         if (domain && domain[strlen(domain)-1] == '.') {
  76                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  77         }
  78
  79         if (domain) {
  80                 struct ldb_dn *dom_dn;
  81                 /* try and find the domain */
  82
  83                 ret = ldb_search_exp_fmt(sam_ctx, mem_ctx, &ref_res,
  84                                          partitions_basedn, LDB_SCOPE_ONELEVEL,
  85                                          ref_attrs,
  86                                          "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  87                                          domain);
  88
  89                 if (ret != LDB_SUCCESS) {
  90                         DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
  91                                  domain,
  92                                  ldb_errstring(sam_ctx)));
  93                         return NT_STATUS_NO_SUCH_DOMAIN;
  94                 } else if (ref_res->count == 1) {
  95                         talloc_steal(mem_ctx, dom_res);
  96                         dom_dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, ref_res->msgs[0], "ncName");
  97                         if (!dom_dn) {
  98                                 return NT_STATUS_NO_SUCH_DOMAIN;
  99                         }
 100                         ret = ldb_search(sam_ctx, dom_dn,
 101                                          LDB_SCOPE_BASE, "objectClass=domain",
 102                                          dom_attrs, &dom_res);
 103                         if (ret != LDB_SUCCESS) {
 104                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(sam_ctx)));
 105                                 return NT_STATUS_NO_SUCH_DOMAIN;
 106                         }
 107                         talloc_steal(mem_ctx, dom_res);
 108                         if (dom_res->count != 1) {
 109                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
 110                                 return NT_STATUS_NO_SUCH_DOMAIN;
 111                         }
 112                 } else if (ref_res->count > 1) {
 113                         talloc_free(ref_res);
 114                         return NT_STATUS_NO_SUCH_DOMAIN;
 115                 }
 116         }
 117
 118         if (netbios_domain) {
 119                 struct ldb_dn *dom_dn;
 120                 /* try and find the domain */
 121
 122                 ret = ldb_search_exp_fmt(sam_ctx, mem_ctx, &ref_res,
 123                                          partitions_basedn, LDB_SCOPE_ONELEVEL,
 124                                          ref_attrs,
 125                                          "(&(objectClass=crossRef)(ncName=*)(nETBIOSName=%s))",
 126                                          netbios_domain);
 127
 128                 if (ret != LDB_SUCCESS) {
 129                         DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
 130                                  netbios_domain,
 131                                  ldb_errstring(sam_ctx)));
 132                         return NT_STATUS_NO_SUCH_DOMAIN;
 133                 } else if (ref_res->count == 1) {
 134                         talloc_steal(mem_ctx, dom_res);
 135                         dom_dn = ldb_msg_find_attr_as_dn(sam_ctx, mem_ctx, ref_res->msgs[0], "ncName");
 136                         if (!dom_dn) {
 137                                 return NT_STATUS_NO_SUCH_DOMAIN;
 138                         }
 139                         ret = ldb_search(sam_ctx, dom_dn,
 140                                          LDB_SCOPE_BASE, "objectClass=domain",
 141                                          dom_attrs, &dom_res);
 142                         if (ret != LDB_SUCCESS) {
 143                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(sam_ctx)));
 144                                 return NT_STATUS_NO_SUCH_DOMAIN;
 145                         }
 146                         talloc_steal(mem_ctx, dom_res);
 147                         if (dom_res->count != 1) {
 148                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
 149                                 return NT_STATUS_NO_SUCH_DOMAIN;
 150                         }
 151                 } else if (ref_res->count > 1) {
 152                         talloc_free(ref_res);
 153                         return NT_STATUS_NO_SUCH_DOMAIN;
 154                 }
 155         }
 156
 157         if ((dom_res == NULL || dom_res->count == 0) && (domain_guid || domain_sid)) {
 158                 ref_res = NULL;
 159
 160                 if (domain_guid) {
 161                         ret = ldb_search_exp_fmt(sam_ctx, mem_ctx, &dom_res,
 162                                                  NULL, LDB_SCOPE_SUBTREE,
 163                                                  dom_attrs,
 164                                                  "(&(objectClass=domainDNS)(objectGUID=%s))",
 165                                                  domain_guid);
 166                 } else { /* domain_sid case */
 167                         ret = ldb_search_exp_fmt(sam_ctx, mem_ctx, &dom_res,
 168                                                  NULL, LDB_SCOPE_SUBTREE,
 169                                                  dom_attrs,
 170                                                  "(&(objectClass=domainDNS)(objectSID=%s))",
 171                                                  dom_sid_string(mem_ctx, domain_sid));
 172                 }
 173
 174                 if (ret != LDB_SUCCESS) {
 175                         DEBUG(2,("Unable to find referece to GUID '%s' or SID %s in sam: %s\n",
 176                                  domain_guid, dom_sid_string(mem_ctx, domain_sid),
 177                                  ldb_errstring(sam_ctx)));
 178                         return NT_STATUS_NO_SUCH_DOMAIN;
 179                 } else if (dom_res->count == 1) {
 180                         /* try and find the domain */
 181                         ret = ldb_search_exp_fmt(sam_ctx, mem_ctx, &ref_res,
 182                                                  partitions_basedn, LDB_SCOPE_ONELEVEL,
 183                                                  ref_attrs,
 184                                                  "(&(objectClass=crossRef)(ncName=%s))",
 185                                                  ldb_dn_get_linearized(dom_res->msgs[0]->dn));
 186
 187                         if (ret != LDB_SUCCESS) {
 188                                 DEBUG(2,("Unable to find referece to '%s' in sam: %s\n",
 189                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn),
 190                                          ldb_errstring(sam_ctx)));
 191                                 return NT_STATUS_NO_SUCH_DOMAIN;
 192
 193                         } else if (ref_res->count != 1) {
 194                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 195                                          ldb_dn_get_linearized(dom_res->msgs[0]->dn)));
 196                                 return NT_STATUS_NO_SUCH_DOMAIN;
 197                         }
 198                 } else if (dom_res->count > 1) {
 199                         talloc_free(ref_res);
 200                         return NT_STATUS_NO_SUCH_DOMAIN;
 201                 }
 202         }
 203
 204         if ((ref_res == NULL || ref_res->count == 0)) {
 205                 DEBUG(2,("Unable to find domain reference with name %s or GUID {%s}\n", domain, domain_guid));
 206                 return NT_STATUS_NO_SUCH_DOMAIN;
 207         }
 208
 209         if ((dom_res == NULL || dom_res->count == 0)) {
 210                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 211                 return NT_STATUS_NO_SUCH_DOMAIN;
 212         }
 213
 214         server_type      =
 215                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 216                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 217                 NBT_SERVER_GOOD_TIMESERV;
 218
 219         if (samdb_is_pdc(sam_ctx)) {
 220                 server_type |= NBT_SERVER_PDC;
 221         }
 222
 223         if (samdb_is_gc(sam_ctx)) {
 224                 server_type |= NBT_SERVER_GC;
 225         }
 226
 227         if (str_list_check(services, "ldap")) {
 228                 server_type |= NBT_SERVER_LDAP;
 229         }
 230
 231         if (str_list_check(services, "kdc")) {
 232                 server_type |= NBT_SERVER_KDC;
 233         }
 234
 235         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(lp_ctx));
 236         domain_uuid      = samdb_result_guid(dom_res->msgs[0], "objectGUID");
 237         realm            = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 238         dns_domain       = samdb_result_string(ref_res->msgs[0], "dnsRoot", lp_realm(lp_ctx));
 239         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 240                                            strlower_talloc(mem_ctx,
 241                                                            lp_netbios_name(lp_ctx)),
 242                                            dns_domain);
 243
 244         flatname         = samdb_result_string(ref_res->msgs[0], "nETBIOSName",
 245                                                lp_workgroup(lp_ctx));
 246         server_site      = "Default-First-Site-Name";
 247         client_site      = "Default-First-Site-Name";
 248         load_interfaces(mem_ctx, lp_interfaces(lp_ctx), &ifaces);
 249         pdc_ip           = iface_best_ip(ifaces, src_address);
 250
 251         ZERO_STRUCTP(netlogon);
 252
 253         if (version & NETLOGON_NT_VERSION_5EX) {
 254                 uint32_t extra_flags = 0;
 255                 netlogon->ntver = NETLOGON_NT_VERSION_5EX;
 256
 257                 /* could check if the user exists */
 258                 if (!user) {
 259                         user = "";
 260                         netlogon->nt5_ex.command      = LOGON_SAM_LOGON_RESPONSE_EX;
 261                 } else {
 262                         netlogon->nt5_ex.command      = LOGON_SAM_LOGON_USER_UNKNOWN_EX;
 263                 }
 264                 netlogon->nt5_ex.server_type  = server_type;
 265                 netlogon->nt5_ex.domain_uuid  = domain_uuid;
 266                 netlogon->nt5_ex.forest       = realm;
 267                 netlogon->nt5_ex.dns_domain   = dns_domain;
 268                 netlogon->nt5_ex.pdc_dns_name = pdc_dns_name;
 269                 netlogon->nt5_ex.domain       = flatname;
 270                 netlogon->nt5_ex.pdc_name     = lp_netbios_name(lp_ctx);
 271                 netlogon->nt5_ex.user_name    = user;
 272                 netlogon->nt5_ex.server_site  = server_site;
 273                 netlogon->nt5_ex.client_site  = client_site;
 274
 275                 if (version & NETLOGON_NT_VERSION_5EX_WITH_IP) {
 276                         /* Clearly this needs to be fixed up for IPv6 */
 277                         extra_flags = NETLOGON_NT_VERSION_5EX_WITH_IP;
 278                         netlogon->nt5_ex.sockaddr.sa_family    = 2;
 279                         netlogon->nt5_ex.sockaddr.pdc_ip       = pdc_ip;
 280                         netlogon->nt5_ex.sockaddr.remaining = data_blob(NULL, 4);
 281                 }
 282                 netlogon->nt5_ex.nt_version   = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5EX|extra_flags;
 283                 netlogon->nt5_ex.lmnt_token   = 0xFFFF;
 284                 netlogon->nt5_ex.lm20_token   = 0xFFFF;
 285
 286         } else if (version & NETLOGON_NT_VERSION_5) {
 287                 netlogon->ntver = NETLOGON_NT_VERSION_5;
 288
 289                 /* could check if the user exists */
 290                 if (!user) {
 291                         user = "";
 292                         netlogon->nt5.command      = LOGON_SAM_LOGON_RESPONSE;
 293                 } else {
 294                         netlogon->nt5.command      = LOGON_SAM_LOGON_USER_UNKNOWN;
 295                 }
 296                 netlogon->nt5.pdc_name     = pdc_name;
 297                 netlogon->nt5.user_name    = user;
 298                 netlogon->nt5.domain_name  = flatname;
 299                 netlogon->nt5.domain_uuid  = domain_uuid;
 300                 netlogon->nt5.forest       = realm;
 301                 netlogon->nt5.dns_domain   = dns_domain;
 302                 netlogon->nt5.pdc_dns_name = pdc_dns_name;
 303                 netlogon->nt5.pdc_ip       = pdc_ip;
 304                 netlogon->nt5.server_type  = server_type;
 305                 netlogon->nt5.nt_version   = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5;
 306                 netlogon->nt5.lmnt_token   = 0xFFFF;
 307                 netlogon->nt5.lm20_token   = 0xFFFF;
 308
 309         } else /* (version & NETLOGON_NT_VERSION_1) and all other cases */ {
 310                 netlogon->ntver = NETLOGON_NT_VERSION_1;
 311                 /* could check if the user exists */
 312                 if (!user) {
 313                         user = "";
 314                         netlogon->nt4.command      = LOGON_SAM_LOGON_RESPONSE;
 315                 } else {
 316                         netlogon->nt4.command      = LOGON_SAM_LOGON_USER_UNKNOWN;
 317                 }
 318                 netlogon->nt4.server      = pdc_name;
 319                 netlogon->nt4.user_name   = user;
 320                 netlogon->nt4.domain      = flatname;
 321                 netlogon->nt4.nt_version  = NETLOGON_NT_VERSION_1;
 322                 netlogon->nt4.lmnt_token  = 0xFFFF;
 323                 netlogon->nt4.lm20_token  = 0xFFFF;
 324         }
 325
 326         return NT_STATUS_OK;
 327 }
 328
 329
 330 /*
 331   handle incoming cldap requests
 332 */
 333 void cldapd_netlogon_request(struct cldap_socket *cldap,
 334                              uint32_t message_id,
 335                              struct ldb_parse_tree *tree,
 336                              struct socket_address *src)
 337 {
 338         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 339         int i;
 340         const char *domain = NULL;
 341         const char *host = NULL;
 342         const char *user = NULL;
 343         const char *domain_guid = NULL;
 344         const char *domain_sid = NULL;
 345         int acct_control = -1;
 346         int version = -1;
 347         struct netlogon_samlogon_response netlogon;
 348         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 349
 350         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 351
 352         if (tree->operation != LDB_OP_AND) goto failed;
 353
 354         /* extract the query elements */
 355         for (i=0;i<tree->u.list.num_elements;i++) {
 356                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 357                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 358                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 359                         domain = talloc_strndup(tmp_ctx,
 360                                                 (const char *)t->u.equality.value.data,
 361                                                 t->u.equality.value.length);
 362                 }
 363                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 364                         host = talloc_strndup(tmp_ctx,
 365                                               (const char *)t->u.equality.value.data,
 366                                               t->u.equality.value.length);
 367                 }
 368                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 369                         NTSTATUS enc_status;
 370                         struct GUID guid;
 371                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 372                                                           t->u.equality.value, &guid);
 373                         if (NT_STATUS_IS_OK(enc_status)) {
 374                                 domain_guid = GUID_string(tmp_ctx, &guid);
 375                         }
 376                 }
 377                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 378                         domain_sid = talloc_strndup(tmp_ctx,
 379                                                     (const char *)t->u.equality.value.data,
 380                                                     t->u.equality.value.length);
 381                 }
 382                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 383                         user = talloc_strndup(tmp_ctx,
 384                                               (const char *)t->u.equality.value.data,
 385                                               t->u.equality.value.length);
 386                 }
 387                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 388                     t->u.equality.value.length == 4) {
 389                         version = IVAL(t->u.equality.value.data, 0);
 390                 }
 391                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 392                     t->u.equality.value.length == 4) {
 393                         acct_control = IVAL(t->u.equality.value.data, 0);
 394                 }
 395         }
 396
 397         if (domain_guid == NULL && domain == NULL) {
 398                 domain = lp_realm(cldapd->task->lp_ctx);
 399         }
 400
 401         if (version == -1) {
 402                 goto failed;
 403         }
 404
 405         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 406                  domain, host, user, version, domain_guid));
 407
 408         status = fill_netlogon_samlogon_response(cldapd->samctx, tmp_ctx, domain, NULL, NULL, domain_guid,
 409                                                  user, src->addr,
 410                                                  version, cldapd->task->lp_ctx, &netlogon);
 411         if (!NT_STATUS_IS_OK(status)) {
 412                 goto failed;
 413         }
 414
 415         status = cldap_netlogon_reply(cldap, message_id, src, version,
 416                                       &netlogon);
 417         if (!NT_STATUS_IS_OK(status)) {
 418                 goto failed;
 419         }
 420
 421         talloc_free(tmp_ctx);
 422         return;
 423
 424 failed:
 425         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 426                  domain, host, version, nt_errstr(status)));
 427         talloc_free(tmp_ctx);
 428         cldap_empty_reply(cldap, message_id, src);
 429 }