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 "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 "db_wrap.h"
  34 #include "system/network.h"
  35 #include "lib/socket/netif.h"
  36
  37 /*
  38   fill in the cldap netlogon union for a given version
  39 */
  40 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  41                                      TALLOC_CTX *mem_ctx,
  42                                      const char *domain,
  43                                      const char *domain_guid,
  44                                      const char *user,
  45                                      const char *src_address,
  46                                      uint32_t version,
  47                                      union nbt_cldap_netlogon *netlogon)
  48 {
  49         const char *ref_attrs[] = {"nETBIOSName", "dnsRoot", "ncName", NULL};
  50         const char *dom_attrs[] = {"objectGUID", NULL};
  51         struct ldb_message **ref_res, **dom_res;
  52         int ret, count = 0;
  53         const char **services = lp_server_services();
  54         uint32_t server_type;
  55         const char *pdc_name;
  56         struct GUID domain_uuid;
  57         const char *realm;
  58         const char *dns_domain;
  59         const char *pdc_dns_name;
  60         const char *flatname;
  61         const char *server_site;
  62         const char *client_site;
  63         const char *pdc_ip;
  64         struct ldb_dn *partitions_basedn;
  65
  66         partitions_basedn = samdb_partitions_dn(cldapd->samctx, mem_ctx);
  67
  68         /* the domain has an optional trailing . */
  69         if (domain && domain[strlen(domain)-1] == '.') {
  70                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  71         }
  72
  73         if (domain) {
  74                 struct ldb_result *dom_ldb_result;
  75                 struct ldb_dn *dom_dn;
  76                 /* try and find the domain */
  77                 count = gendb_search(cldapd->samctx, mem_ctx, partitions_basedn, &ref_res, ref_attrs,
  78                                    "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  79                                    domain);
  80                 if (count == 1) {
  81                         dom_dn = samdb_result_dn(cldapd->samctx, mem_ctx, ref_res[0], "ncName", NULL);
  82                         if (!dom_dn) {
  83                                 return NT_STATUS_NO_SUCH_DOMAIN;
  84                         }
  85                         ret = ldb_search(cldapd->samctx, dom_dn,
  86                                          LDB_SCOPE_BASE, "objectClass=domain",
  87                                          dom_attrs, &dom_ldb_result);
  88                         if (ret != LDB_SUCCESS) {
  89                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(dom_dn), ldb_errstring(cldapd->samctx)));
  90                                 return NT_STATUS_NO_SUCH_DOMAIN;
  91                         }
  92                         talloc_steal(mem_ctx, dom_ldb_result);
  93                         if (dom_ldb_result->count != 1) {
  94                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(dom_dn)));
  95                                 return NT_STATUS_NO_SUCH_DOMAIN;
  96                         }
  97                         dom_res = dom_ldb_result->msgs;
  98                 }
  99         }
 100
 101         if (count == 0 && domain_guid) {
 102                 /* OK, so no dice with the name, try and find the domain with the GUID */
 103                 count = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
 104                                    "(&(objectClass=domainDNS)(objectGUID=%s))",
 105                                    domain_guid);
 106                 if (count == 1) {
 107                         /* try and find the domain */
 108                         ret = gendb_search(cldapd->samctx, mem_ctx, partitions_basedn, &ref_res, ref_attrs,
 109                                            "(&(objectClass=crossRef)(ncName=%s))",
 110                                            ldb_dn_get_linearized(dom_res[0]->dn));
 111                         if (ret != 1) {
 112                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 113                                          ldb_dn_get_linearized(dom_res[0]->dn)));
 114                                 return NT_STATUS_NO_SUCH_DOMAIN;
 115                         }
 116                 }
 117         }
 118
 119         if (count == 0) {
 120                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 121                 return NT_STATUS_NO_SUCH_DOMAIN;
 122         }
 123
 124         server_type      =
 125                 NBT_SERVER_PDC | NBT_SERVER_GC |
 126                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 127                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 128                 NBT_SERVER_GOOD_TIMESERV;
 129
 130         if (str_list_check(services, "ldap")) {
 131                 server_type |= NBT_SERVER_LDAP;
 132         }
 133
 134         if (str_list_check(services, "kdc")) {
 135                 server_type |= NBT_SERVER_KDC;
 136         }
 137
 138         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 139         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 140         realm            = samdb_result_string(ref_res[0], "dnsRoot", lp_realm());
 141         dns_domain       = samdb_result_string(ref_res[0], "dnsRoot", lp_realm());
 142         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 143                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 144                                            dns_domain);
 145
 146         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 147         server_site      = "Default-First-Site-Name";
 148         client_site      = "Default-First-Site-Name";
 149         pdc_ip           = iface_best_ip(src_address);
 150
 151         ZERO_STRUCTP(netlogon);
 152
 153         switch (version & 0xF) {
 154         case 0:
 155         case 1:
 156                 netlogon->logon1.type        = (user?19+2:19);
 157                 netlogon->logon1.pdc_name    = pdc_name;
 158                 netlogon->logon1.user_name   = user;
 159                 netlogon->logon1.domain_name = flatname;
 160                 netlogon->logon1.nt_version  = 1;
 161                 netlogon->logon1.lmnt_token  = 0xFFFF;
 162                 netlogon->logon1.lm20_token  = 0xFFFF;
 163                 break;
 164         case 2:
 165         case 3:
 166                 netlogon->logon3.type         = (user?19+2:19);
 167                 netlogon->logon3.pdc_name     = pdc_name;
 168                 netlogon->logon3.user_name    = user;
 169                 netlogon->logon3.domain_name  = flatname;
 170                 netlogon->logon3.domain_uuid  = domain_uuid;
 171                 netlogon->logon3.forest       = realm;
 172                 netlogon->logon3.dns_domain   = dns_domain;
 173                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 174                 netlogon->logon3.pdc_ip       = pdc_ip;
 175                 netlogon->logon3.server_type  = server_type;
 176                 netlogon->logon3.lmnt_token   = 0xFFFF;
 177                 netlogon->logon3.lm20_token   = 0xFFFF;
 178                 break;
 179         case 4:
 180         case 5:
 181         case 6:
 182         case 7:
 183                 netlogon->logon5.type         = (user?23+2:23);
 184                 netlogon->logon5.server_type  = server_type;
 185                 netlogon->logon5.domain_uuid  = domain_uuid;
 186                 netlogon->logon5.forest       = realm;
 187                 netlogon->logon5.dns_domain   = dns_domain;
 188                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 189                 netlogon->logon5.domain       = flatname;
 190                 netlogon->logon5.pdc_name     = lp_netbios_name();
 191                 netlogon->logon5.user_name    = user;
 192                 netlogon->logon5.server_site  = server_site;
 193                 netlogon->logon5.client_site  = client_site;
 194                 netlogon->logon5.lmnt_token   = 0xFFFF;
 195                 netlogon->logon5.lm20_token   = 0xFFFF;
 196                 break;
 197         default:
 198                 netlogon->logon13.type         = (user?23+2:23);
 199                 netlogon->logon13.server_type  = server_type;
 200                 netlogon->logon13.domain_uuid  = domain_uuid;
 201                 netlogon->logon13.forest       = realm;
 202                 netlogon->logon13.dns_domain   = dns_domain;
 203                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 204                 netlogon->logon13.domain       = flatname;
 205                 netlogon->logon13.pdc_name     = lp_netbios_name();
 206                 netlogon->logon13.user_name    = user;
 207                 netlogon->logon13.server_site  = server_site;
 208                 netlogon->logon13.client_site  = client_site;
 209                 netlogon->logon13.unknown      = 10;
 210                 netlogon->logon13.unknown2     = 2;
 211                 netlogon->logon13.pdc_ip       = pdc_ip;
 212                 netlogon->logon13.lmnt_token   = 0xFFFF;
 213                 netlogon->logon13.lm20_token   = 0xFFFF;
 214                 break;
 215         }
 216
 217         return NT_STATUS_OK;
 218 }
 219
 220
 221 /*
 222   handle incoming cldap requests
 223 */
 224 void cldapd_netlogon_request(struct cldap_socket *cldap,
 225                              uint32_t message_id,
 226                              struct ldb_parse_tree *tree,
 227                              struct socket_address *src)
 228 {
 229         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 230         int i;
 231         const char *domain = NULL;
 232         const char *host = NULL;
 233         const char *user = NULL;
 234         const char *domain_guid = NULL;
 235         const char *domain_sid = NULL;
 236         int acct_control = -1;
 237         int version = -1;
 238         union nbt_cldap_netlogon netlogon;
 239         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 240
 241         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 242
 243         if (tree->operation != LDB_OP_AND) goto failed;
 244
 245         /* extract the query elements */
 246         for (i=0;i<tree->u.list.num_elements;i++) {
 247                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 248                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 249                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 250                         domain = talloc_strndup(tmp_ctx,
 251                                                 (const char *)t->u.equality.value.data,
 252                                                 t->u.equality.value.length);
 253                 }
 254                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 255                         host = talloc_strndup(tmp_ctx,
 256                                               (const char *)t->u.equality.value.data,
 257                                               t->u.equality.value.length);
 258                 }
 259                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 260                         NTSTATUS enc_status;
 261                         struct GUID guid;
 262                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 263                                                           t->u.equality.value, &guid);
 264                         if (NT_STATUS_IS_OK(enc_status)) {
 265                                 domain_guid = GUID_string(tmp_ctx, &guid);
 266                         }
 267                 }
 268                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 269                         domain_sid = talloc_strndup(tmp_ctx,
 270                                                     (const char *)t->u.equality.value.data,
 271                                                     t->u.equality.value.length);
 272                 }
 273                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 274                         user = talloc_strndup(tmp_ctx,
 275                                               (const char *)t->u.equality.value.data,
 276                                               t->u.equality.value.length);
 277                 }
 278                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 279                     t->u.equality.value.length == 4) {
 280                         version = IVAL(t->u.equality.value.data, 0);
 281                 }
 282                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 283                     t->u.equality.value.length == 4) {
 284                         acct_control = IVAL(t->u.equality.value.data, 0);
 285                 }
 286         }
 287
 288         if (domain_guid == NULL && domain == NULL) {
 289                 domain = lp_realm();
 290         }
 291
 292         if (version == -1) {
 293                 goto failed;
 294         }
 295
 296         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 297                  domain, host, user, version, domain_guid));
 298
 299         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 300                                       user, src->addr,
 301                                       version, &netlogon);
 302         if (!NT_STATUS_IS_OK(status)) {
 303                 goto failed;
 304         }
 305
 306         status = cldap_netlogon_reply(cldap, message_id, src, version,
 307                                       &netlogon);
 308         if (!NT_STATUS_IS_OK(status)) {
 309                 goto failed;
 310         }
 311
 312         talloc_free(tmp_ctx);
 313         return;
 314
 315 failed:
 316         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 317                  domain, host, version, nt_errstr(status)));
 318         talloc_free(tmp_ctx);
 319         cldap_empty_reply(cldap, message_id, src);
 320 }