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/events/events.h"
  26 #include "lib/socket/socket.h"
  27 #include "smbd/service_task.h"
  28 #include "cldap_server/cldap_server.h"
  29
  30 /*
  31   fill in the cldap netlogon union for a given version
  32 */
  33 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  34                                      TALLOC_CTX *mem_ctx,
  35                                      const char *domain,
  36                                      const char *domain_guid,
  37                                      const char *user,
  38                                      const char *src_address,
  39                                      uint32_t version,
  40                                      union nbt_cldap_netlogon *netlogon)
  41 {
  42         const char *ref_attrs[] = {"nETBIOSName", NULL};
  43         const char *dom_attrs[] = {"dnsDomain", "objectGUID", NULL};
  44         struct ldb_message **ref_res, **dom_res;
  45         int ret;
  46         const char **services = lp_server_services();
  47         uint32_t server_type;
  48         const char *pdc_name;
  49         struct GUID domain_uuid;
  50         const char *realm;
  51         const char *dns_domain;
  52         const char *pdc_dns_name;
  53         const char *flatname;
  54         const char *site_name;
  55         const char *site_name2;
  56         const char *pdc_ip;
  57
  58         if (cldapd->samctx == NULL) {
  59                 cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
  60                 if (cldapd->samctx == NULL) {
  61                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  62                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  63                 }
  64         }
  65
  66         /* the domain has an optional trailing . */
  67         if (domain && domain[strlen(domain)-1] == '.') {
  68                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  69         }
  70
  71         /* try and find the domain */
  72         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
  73                            "(&(objectClass=domainDNS)(|(dnsDomain=%s)(objectGUID=%s)))",
  74                            domain?domain:"",
  75                            domain_guid?domain_guid:"");
  76         if (ret != 1) {
  77                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  78                 return NT_STATUS_NO_SUCH_DOMAIN;
  79         }
  80
  81         /* try and find the domain */
  82         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &ref_res, ref_attrs,
  83                            "(&(objectClass=crossRef)(ncName=%s))",
  84                            ldb_dn_linearize(mem_ctx, dom_res[0]->dn));
  85         if (ret != 1) {
  86                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
  87                          ldb_dn_linearize(mem_ctx, dom_res[0]->dn)));
  88                 return NT_STATUS_NO_SUCH_DOMAIN;
  89         }
  90
  91         server_type      =
  92                 NBT_SERVER_PDC | NBT_SERVER_GC |
  93                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
  94                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
  95                 NBT_SERVER_GOOD_TIMESERV;
  96
  97         if (str_list_check(services, "ldap")) {
  98                 server_type |= NBT_SERVER_LDAP;
  99         }
 100
 101         if (str_list_check(services, "kdc")) {
 102                 server_type |= NBT_SERVER_KDC;
 103         }
 104
 105         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 106         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 107         realm            = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 108         dns_domain       = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 109         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 110                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 111                                            dns_domain);
 112
 113         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 114         site_name        = "Default-First-Site-Name";
 115         site_name2       = "Default-First-Site-Name";
 116         pdc_ip           = iface_best_ip(src_address);
 117
 118         ZERO_STRUCTP(netlogon);
 119
 120         switch (version & 0xF) {
 121         case 0:
 122         case 1:
 123                 netlogon->logon1.type        = (user?19+2:19);
 124                 netlogon->logon1.pdc_name    = pdc_name;
 125                 netlogon->logon1.user_name   = user;
 126                 netlogon->logon1.domain_name = flatname;
 127                 netlogon->logon1.nt_version  = 1;
 128                 netlogon->logon1.lmnt_token  = 0xFFFF;
 129                 netlogon->logon1.lm20_token  = 0xFFFF;
 130                 break;
 131         case 2:
 132         case 3:
 133                 netlogon->logon3.type         = (user?19+2:19);
 134                 netlogon->logon3.pdc_name     = pdc_name;
 135                 netlogon->logon3.user_name    = user;
 136                 netlogon->logon3.domain_name  = flatname;
 137                 netlogon->logon3.domain_uuid  = domain_uuid;
 138                 netlogon->logon3.forest       = realm;
 139                 netlogon->logon3.dns_domain   = dns_domain;
 140                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 141                 netlogon->logon3.pdc_ip       = pdc_ip;
 142                 netlogon->logon3.server_type  = server_type;
 143                 netlogon->logon3.lmnt_token   = 0xFFFF;
 144                 netlogon->logon3.lm20_token   = 0xFFFF;
 145                 break;
 146         case 4:
 147         case 5:
 148         case 6:
 149         case 7:
 150                 netlogon->logon5.type         = (user?23+2:23);
 151                 netlogon->logon5.server_type  = server_type;
 152                 netlogon->logon5.domain_uuid  = domain_uuid;
 153                 netlogon->logon5.forest       = realm;
 154                 netlogon->logon5.dns_domain   = dns_domain;
 155                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 156                 netlogon->logon5.domain       = flatname;
 157                 netlogon->logon5.pdc_name     = lp_netbios_name();
 158                 netlogon->logon5.user_name    = user;
 159                 netlogon->logon5.site_name    = site_name;
 160                 netlogon->logon5.site_name2   = site_name2;
 161                 netlogon->logon5.lmnt_token   = 0xFFFF;
 162                 netlogon->logon5.lm20_token   = 0xFFFF;
 163                 break;
 164         default:
 165                 netlogon->logon13.type         = (user?23+2:23);
 166                 netlogon->logon13.server_type  = server_type;
 167                 netlogon->logon13.domain_uuid  = domain_uuid;
 168                 netlogon->logon13.forest       = realm;
 169                 netlogon->logon13.dns_domain   = dns_domain;
 170                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 171                 netlogon->logon13.domain       = flatname;
 172                 netlogon->logon13.pdc_name     = lp_netbios_name();
 173                 netlogon->logon13.user_name    = user;
 174                 netlogon->logon13.site_name    = site_name;
 175                 netlogon->logon13.site_name2   = site_name2;
 176                 netlogon->logon13.unknown      = 10;
 177                 netlogon->logon13.unknown2     = 2;
 178                 netlogon->logon13.pdc_ip       = pdc_ip;
 179                 netlogon->logon13.lmnt_token   = 0xFFFF;
 180                 netlogon->logon13.lm20_token   = 0xFFFF;
 181                 break;
 182         }
 183
 184         return NT_STATUS_OK;
 185 }
 186
 187
 188 /*
 189   handle incoming cldap requests
 190 */
 191 void cldapd_netlogon_request(struct cldap_socket *cldap,
 192                              uint32_t message_id,
 193                              struct ldb_parse_tree *tree,
 194                              const char *src_address, int src_port)
 195 {
 196         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 197         int i;
 198         const char *domain = NULL;
 199         const char *host = NULL;
 200         const char *user = NULL;
 201         const char *domain_guid = NULL;
 202         const char *domain_sid = NULL;
 203         int acct_control = -1;
 204         int version = -1;
 205         union nbt_cldap_netlogon netlogon;
 206         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 207
 208         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 209
 210         if (tree->operation != LDB_OP_AND) goto failed;
 211
 212         /* extract the query elements */
 213         for (i=0;i<tree->u.list.num_elements;i++) {
 214                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 215                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 216                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 217                         domain = talloc_strndup(tmp_ctx,
 218                                                 t->u.equality.value.data,
 219                                                 t->u.equality.value.length);
 220                 }
 221                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 222                         host = talloc_strndup(tmp_ctx,
 223                                               t->u.equality.value.data,
 224                                               t->u.equality.value.length);
 225                 }
 226                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 227                         NTSTATUS enc_status;
 228                         struct GUID guid;
 229                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 230                                                           t->u.equality.value, &guid);
 231                         if (NT_STATUS_IS_OK(enc_status)) {
 232                                 domain_guid = GUID_string(tmp_ctx, &guid);
 233                         }
 234                 }
 235                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 236                         domain_sid = talloc_strndup(tmp_ctx,
 237                                                     t->u.equality.value.data,
 238                                                     t->u.equality.value.length);
 239                 }
 240                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 241                         user = talloc_strndup(tmp_ctx,
 242                                               t->u.equality.value.data,
 243                                               t->u.equality.value.length);
 244                 }
 245                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 246                     t->u.equality.value.length == 4) {
 247                         version = IVAL(t->u.equality.value.data, 0);
 248                 }
 249                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 250                     t->u.equality.value.length == 4) {
 251                         acct_control = IVAL(t->u.equality.value.data, 0);
 252                 }
 253         }
 254
 255         if (domain_guid == NULL && domain == NULL) {
 256                 domain = lp_realm();
 257         }
 258
 259         if (version == -1) {
 260                 goto failed;
 261         }
 262
 263         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 264                  domain, host, user, version, domain_guid));
 265
 266         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 267                                       user, src_address,
 268                                       version, &netlogon);
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 goto failed;
 271         }
 272
 273         status = cldap_netlogon_reply(cldap, message_id, src_address, src_port, version,
 274                                       &netlogon);
 275         if (!NT_STATUS_IS_OK(status)) {
 276                 goto failed;
 277         }
 278
 279         talloc_free(tmp_ctx);
 280         return;
 281
 282 failed:
 283         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 284                  domain, host, version, nt_errstr(status)));
 285         talloc_free(tmp_ctx);
 286         cldap_empty_reply(cldap, message_id, src_address, src_port);
 287 }