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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/ldap/ldap.h"
  25 #include "lib/ldb/include/ldb.h"
  26 #include "lib/ldb/include/ldb_errors.h"
  27 #include "lib/events/events.h"
  28 #include "lib/socket/socket.h"
  29 #include "smbd/service_task.h"
  30 #include "cldap_server/cldap_server.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "dsdb/samdb/samdb.h"
  33 #include "auth/auth.h"
  34 #include "db_wrap.h"
  35 #include "system/network.h"
  36 #include "lib/socket/netif.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_message **ref_res, **dom_res;
  53         int ret, count = 0;
  54         const char **services = lp_server_services();
  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         const struct ldb_dn *partitions_basedn;
  66
  67         if (cldapd->samctx == NULL) {
  68                 cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
  69                 if (cldapd->samctx == NULL) {
  70                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  71                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  72                 }
  73         }
  74
  75         partitions_basedn = samdb_partitions_dn(cldapd->samctx, mem_ctx);
  76
  77         /* the domain has an optional trailing . */
  78         if (domain && domain[strlen(domain)-1] == '.') {
  79                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  80         }
  81
  82         if (domain) {
  83                 struct ldb_result *dom_ldb_result;
  84                 struct ldb_dn *dom_dn;
  85                 /* try and find the domain */
  86                 count = gendb_search(cldapd->samctx, mem_ctx, partitions_basedn, &ref_res, ref_attrs,
  87                                    "(&(&(objectClass=crossRef)(dnsRoot=%s))(nETBIOSName=*))",
  88                                    domain);
  89                 if (count == 1) {
  90                         dom_dn = samdb_result_dn(mem_ctx, ref_res[0], "ncName", NULL);
  91                         if (!dom_dn) {
  92                                 return NT_STATUS_NO_SUCH_DOMAIN;
  93                         }
  94                         ret = ldb_search(cldapd->samctx, dom_dn,
  95                                          LDB_SCOPE_BASE, "objectClass=domain",
  96                                          dom_attrs, &dom_ldb_result);
  97                         if (ret != LDB_SUCCESS) {
  98                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_linearize(mem_ctx, dom_dn), ldb_errstring(cldapd->samctx)));
  99                                 return NT_STATUS_NO_SUCH_DOMAIN;
 100                         }
 101                         talloc_steal(mem_ctx, dom_ldb_result);
 102                         if (dom_ldb_result->count != 1) {
 103                                 DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_linearize(mem_ctx, dom_dn)));
 104                                 return NT_STATUS_NO_SUCH_DOMAIN;
 105                         }
 106                         dom_res = dom_ldb_result->msgs;
 107                 }
 108         }
 109
 110         if (count == 0 && domain_guid) {
 111                 /* OK, so no dice with the name, try and find the domain with the GUID */
 112                 count = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
 113                                    "(&(objectClass=domainDNS)(objectGUID=%s))",
 114                                    domain_guid);
 115                 if (count == 1) {
 116                         /* try and find the domain */
 117                         ret = gendb_search(cldapd->samctx, mem_ctx, partitions_basedn, &ref_res, ref_attrs,
 118                                            "(&(objectClass=crossRef)(ncName=%s))",
 119                                            ldb_dn_linearize(mem_ctx, dom_res[0]->dn));
 120                         if (ret != 1) {
 121                                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
 122                                          ldb_dn_linearize(mem_ctx, dom_res[0]->dn)));
 123                                 return NT_STATUS_NO_SUCH_DOMAIN;
 124                         }
 125                 }
 126         }
 127
 128         if (count == 0) {
 129                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
 130                 return NT_STATUS_NO_SUCH_DOMAIN;
 131         }
 132
 133         server_type      =
 134                 NBT_SERVER_PDC | NBT_SERVER_GC |
 135                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 136                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 137                 NBT_SERVER_GOOD_TIMESERV;
 138
 139         if (str_list_check(services, "ldap")) {
 140                 server_type |= NBT_SERVER_LDAP;
 141         }
 142
 143         if (str_list_check(services, "kdc")) {
 144                 server_type |= NBT_SERVER_KDC;
 145         }
 146
 147         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 148         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 149         realm            = samdb_result_string(ref_res[0], "dnsRoot", lp_realm());
 150         dns_domain       = samdb_result_string(ref_res[0], "dnsRoot", lp_realm());
 151         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 152                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 153                                            dns_domain);
 154
 155         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 156         server_site      = "Default-First-Site-Name";
 157         client_site      = "Default-First-Site-Name";
 158         pdc_ip           = iface_best_ip(src_address);
 159
 160         ZERO_STRUCTP(netlogon);
 161
 162         switch (version & 0xF) {
 163         case 0:
 164         case 1:
 165                 netlogon->logon1.type        = (user?19+2:19);
 166                 netlogon->logon1.pdc_name    = pdc_name;
 167                 netlogon->logon1.user_name   = user;
 168                 netlogon->logon1.domain_name = flatname;
 169                 netlogon->logon1.nt_version  = 1;
 170                 netlogon->logon1.lmnt_token  = 0xFFFF;
 171                 netlogon->logon1.lm20_token  = 0xFFFF;
 172                 break;
 173         case 2:
 174         case 3:
 175                 netlogon->logon3.type         = (user?19+2:19);
 176                 netlogon->logon3.pdc_name     = pdc_name;
 177                 netlogon->logon3.user_name    = user;
 178                 netlogon->logon3.domain_name  = flatname;
 179                 netlogon->logon3.domain_uuid  = domain_uuid;
 180                 netlogon->logon3.forest       = realm;
 181                 netlogon->logon3.dns_domain   = dns_domain;
 182                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 183                 netlogon->logon3.pdc_ip       = pdc_ip;
 184                 netlogon->logon3.server_type  = server_type;
 185                 netlogon->logon3.lmnt_token   = 0xFFFF;
 186                 netlogon->logon3.lm20_token   = 0xFFFF;
 187                 break;
 188         case 4:
 189         case 5:
 190         case 6:
 191         case 7:
 192                 netlogon->logon5.type         = (user?23+2:23);
 193                 netlogon->logon5.server_type  = server_type;
 194                 netlogon->logon5.domain_uuid  = domain_uuid;
 195                 netlogon->logon5.forest       = realm;
 196                 netlogon->logon5.dns_domain   = dns_domain;
 197                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 198                 netlogon->logon5.domain       = flatname;
 199                 netlogon->logon5.pdc_name     = lp_netbios_name();
 200                 netlogon->logon5.user_name    = user;
 201                 netlogon->logon5.server_site  = server_site;
 202                 netlogon->logon5.client_site  = client_site;
 203                 netlogon->logon5.lmnt_token   = 0xFFFF;
 204                 netlogon->logon5.lm20_token   = 0xFFFF;
 205                 break;
 206         default:
 207                 netlogon->logon13.type         = (user?23+2:23);
 208                 netlogon->logon13.server_type  = server_type;
 209                 netlogon->logon13.domain_uuid  = domain_uuid;
 210                 netlogon->logon13.forest       = realm;
 211                 netlogon->logon13.dns_domain   = dns_domain;
 212                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 213                 netlogon->logon13.domain       = flatname;
 214                 netlogon->logon13.pdc_name     = lp_netbios_name();
 215                 netlogon->logon13.user_name    = user;
 216                 netlogon->logon13.server_site  = server_site;
 217                 netlogon->logon13.client_site  = client_site;
 218                 netlogon->logon13.unknown      = 10;
 219                 netlogon->logon13.unknown2     = 2;
 220                 netlogon->logon13.pdc_ip       = pdc_ip;
 221                 netlogon->logon13.lmnt_token   = 0xFFFF;
 222                 netlogon->logon13.lm20_token   = 0xFFFF;
 223                 break;
 224         }
 225
 226         return NT_STATUS_OK;
 227 }
 228
 229
 230 /*
 231   handle incoming cldap requests
 232 */
 233 void cldapd_netlogon_request(struct cldap_socket *cldap,
 234                              uint32_t message_id,
 235                              struct ldb_parse_tree *tree,
 236                              struct socket_address *src)
 237 {
 238         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 239         int i;
 240         const char *domain = NULL;
 241         const char *host = NULL;
 242         const char *user = NULL;
 243         const char *domain_guid = NULL;
 244         const char *domain_sid = NULL;
 245         int acct_control = -1;
 246         int version = -1;
 247         union nbt_cldap_netlogon netlogon;
 248         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 249
 250         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 251
 252         if (tree->operation != LDB_OP_AND) goto failed;
 253
 254         /* extract the query elements */
 255         for (i=0;i<tree->u.list.num_elements;i++) {
 256                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 257                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 258                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 259                         domain = talloc_strndup(tmp_ctx,
 260                                                 (const char *)t->u.equality.value.data,
 261                                                 t->u.equality.value.length);
 262                 }
 263                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 264                         host = talloc_strndup(tmp_ctx,
 265                                               (const char *)t->u.equality.value.data,
 266                                               t->u.equality.value.length);
 267                 }
 268                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 269                         NTSTATUS enc_status;
 270                         struct GUID guid;
 271                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 272                                                           t->u.equality.value, &guid);
 273                         if (NT_STATUS_IS_OK(enc_status)) {
 274                                 domain_guid = GUID_string(tmp_ctx, &guid);
 275                         }
 276                 }
 277                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 278                         domain_sid = talloc_strndup(tmp_ctx,
 279                                                     (const char *)t->u.equality.value.data,
 280                                                     t->u.equality.value.length);
 281                 }
 282                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 283                         user = talloc_strndup(tmp_ctx,
 284                                               (const char *)t->u.equality.value.data,
 285                                               t->u.equality.value.length);
 286                 }
 287                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 288                     t->u.equality.value.length == 4) {
 289                         version = IVAL(t->u.equality.value.data, 0);
 290                 }
 291                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 292                     t->u.equality.value.length == 4) {
 293                         acct_control = IVAL(t->u.equality.value.data, 0);
 294                 }
 295         }
 296
 297         if (domain_guid == NULL && domain == NULL) {
 298                 domain = lp_realm();
 299         }
 300
 301         if (version == -1) {
 302                 goto failed;
 303         }
 304
 305         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 306                  domain, host, user, version, domain_guid));
 307
 308         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 309                                       user, src->addr,
 310                                       version, &netlogon);
 311         if (!NT_STATUS_IS_OK(status)) {
 312                 goto failed;
 313         }
 314
 315         status = cldap_netlogon_reply(cldap, message_id, src, version,
 316                                       &netlogon);
 317         if (!NT_STATUS_IS_OK(status)) {
 318                 goto failed;
 319         }
 320
 321         talloc_free(tmp_ctx);
 322         return;
 323
 324 failed:
 325         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 326                  domain, host, version, nt_errstr(status)));
 327         talloc_free(tmp_ctx);
 328         cldap_empty_reply(cldap, message_id, src);
 329 }