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 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 #include "dsdb/samdb/samdb.h"
  30 #include "auth/auth.h"
  31
  32 /*
  33   fill in the cldap netlogon union for a given version
  34 */
  35 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  36                                      TALLOC_CTX *mem_ctx,
  37                                      const char *domain,
  38                                      const char *domain_guid,
  39                                      const char *user,
  40                                      const char *src_address,
  41                                      uint32_t version,
  42                                      union nbt_cldap_netlogon *netlogon)
  43 {
  44         const char *ref_attrs[] = {"nETBIOSName", NULL};
  45         const char *dom_attrs[] = {"dnsDomain", "objectGUID", NULL};
  46         struct ldb_message **ref_res, **dom_res;
  47         int ret;
  48         const char **services = lp_server_services();
  49         uint32_t server_type;
  50         const char *pdc_name;
  51         struct GUID domain_uuid;
  52         const char *realm;
  53         const char *dns_domain;
  54         const char *pdc_dns_name;
  55         const char *flatname;
  56         const char *site_name;
  57         const char *site_name2;
  58         const char *pdc_ip;
  59
  60         if (cldapd->samctx == NULL) {
  61                 cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
  62                 if (cldapd->samctx == NULL) {
  63                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  64                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  65                 }
  66         }
  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         /* try and find the domain */
  74         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
  75                            "(&(objectClass=domainDNS)(|(dnsDomain=%s)(objectGUID=%s)))",
  76                            domain?domain:"",
  77                            domain_guid?domain_guid:"");
  78         if (ret != 1) {
  79                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  80                 return NT_STATUS_NO_SUCH_DOMAIN;
  81         }
  82
  83         /* try and find the domain */
  84         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &ref_res, ref_attrs,
  85                            "(&(objectClass=crossRef)(ncName=%s))",
  86                            ldb_dn_linearize(mem_ctx, dom_res[0]->dn));
  87         if (ret != 1) {
  88                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
  89                          ldb_dn_linearize(mem_ctx, dom_res[0]->dn)));
  90                 return NT_STATUS_NO_SUCH_DOMAIN;
  91         }
  92
  93         server_type      =
  94                 NBT_SERVER_PDC | NBT_SERVER_GC |
  95                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
  96                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
  97                 NBT_SERVER_GOOD_TIMESERV;
  98
  99         if (str_list_check(services, "ldap")) {
 100                 server_type |= NBT_SERVER_LDAP;
 101         }
 102
 103         if (str_list_check(services, "kdc")) {
 104                 server_type |= NBT_SERVER_KDC;
 105         }
 106
 107         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 108         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 109         realm            = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 110         dns_domain       = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 111         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 112                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 113                                            dns_domain);
 114
 115         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 116         site_name        = "Default-First-Site-Name";
 117         site_name2       = "Default-First-Site-Name";
 118         pdc_ip           = iface_best_ip(src_address);
 119
 120         ZERO_STRUCTP(netlogon);
 121
 122         switch (version & 0xF) {
 123         case 0:
 124         case 1:
 125                 netlogon->logon1.type        = (user?19+2:19);
 126                 netlogon->logon1.pdc_name    = pdc_name;
 127                 netlogon->logon1.user_name   = user;
 128                 netlogon->logon1.domain_name = flatname;
 129                 netlogon->logon1.nt_version  = 1;
 130                 netlogon->logon1.lmnt_token  = 0xFFFF;
 131                 netlogon->logon1.lm20_token  = 0xFFFF;
 132                 break;
 133         case 2:
 134         case 3:
 135                 netlogon->logon3.type         = (user?19+2:19);
 136                 netlogon->logon3.pdc_name     = pdc_name;
 137                 netlogon->logon3.user_name    = user;
 138                 netlogon->logon3.domain_name  = flatname;
 139                 netlogon->logon3.domain_uuid  = domain_uuid;
 140                 netlogon->logon3.forest       = realm;
 141                 netlogon->logon3.dns_domain   = dns_domain;
 142                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 143                 netlogon->logon3.pdc_ip       = pdc_ip;
 144                 netlogon->logon3.server_type  = server_type;
 145                 netlogon->logon3.lmnt_token   = 0xFFFF;
 146                 netlogon->logon3.lm20_token   = 0xFFFF;
 147                 break;
 148         case 4:
 149         case 5:
 150         case 6:
 151         case 7:
 152                 netlogon->logon5.type         = (user?23+2:23);
 153                 netlogon->logon5.server_type  = server_type;
 154                 netlogon->logon5.domain_uuid  = domain_uuid;
 155                 netlogon->logon5.forest       = realm;
 156                 netlogon->logon5.dns_domain   = dns_domain;
 157                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 158                 netlogon->logon5.domain       = flatname;
 159                 netlogon->logon5.pdc_name     = lp_netbios_name();
 160                 netlogon->logon5.user_name    = user;
 161                 netlogon->logon5.site_name    = site_name;
 162                 netlogon->logon5.site_name2   = site_name2;
 163                 netlogon->logon5.lmnt_token   = 0xFFFF;
 164                 netlogon->logon5.lm20_token   = 0xFFFF;
 165                 break;
 166         default:
 167                 netlogon->logon13.type         = (user?23+2:23);
 168                 netlogon->logon13.server_type  = server_type;
 169                 netlogon->logon13.domain_uuid  = domain_uuid;
 170                 netlogon->logon13.forest       = realm;
 171                 netlogon->logon13.dns_domain   = dns_domain;
 172                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 173                 netlogon->logon13.domain       = flatname;
 174                 netlogon->logon13.pdc_name     = lp_netbios_name();
 175                 netlogon->logon13.user_name    = user;
 176                 netlogon->logon13.site_name    = site_name;
 177                 netlogon->logon13.site_name2   = site_name2;
 178                 netlogon->logon13.unknown      = 10;
 179                 netlogon->logon13.unknown2     = 2;
 180                 netlogon->logon13.pdc_ip       = pdc_ip;
 181                 netlogon->logon13.lmnt_token   = 0xFFFF;
 182                 netlogon->logon13.lm20_token   = 0xFFFF;
 183                 break;
 184         }
 185
 186         return NT_STATUS_OK;
 187 }
 188
 189
 190 /*
 191   handle incoming cldap requests
 192 */
 193 void cldapd_netlogon_request(struct cldap_socket *cldap,
 194                              uint32_t message_id,
 195                              struct ldb_parse_tree *tree,
 196                              struct socket_address *src)
 197 {
 198         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 199         int i;
 200         const char *domain = NULL;
 201         const char *host = NULL;
 202         const char *user = NULL;
 203         const char *domain_guid = NULL;
 204         const char *domain_sid = NULL;
 205         int acct_control = -1;
 206         int version = -1;
 207         union nbt_cldap_netlogon netlogon;
 208         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 209
 210         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 211
 212         if (tree->operation != LDB_OP_AND) goto failed;
 213
 214         /* extract the query elements */
 215         for (i=0;i<tree->u.list.num_elements;i++) {
 216                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 217                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 218                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 219                         domain = talloc_strndup(tmp_ctx,
 220                                                 t->u.equality.value.data,
 221                                                 t->u.equality.value.length);
 222                 }
 223                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 224                         host = talloc_strndup(tmp_ctx,
 225                                               t->u.equality.value.data,
 226                                               t->u.equality.value.length);
 227                 }
 228                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 229                         NTSTATUS enc_status;
 230                         struct GUID guid;
 231                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 232                                                           t->u.equality.value, &guid);
 233                         if (NT_STATUS_IS_OK(enc_status)) {
 234                                 domain_guid = GUID_string(tmp_ctx, &guid);
 235                         }
 236                 }
 237                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 238                         domain_sid = talloc_strndup(tmp_ctx,
 239                                                     t->u.equality.value.data,
 240                                                     t->u.equality.value.length);
 241                 }
 242                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 243                         user = talloc_strndup(tmp_ctx,
 244                                               t->u.equality.value.data,
 245                                               t->u.equality.value.length);
 246                 }
 247                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 248                     t->u.equality.value.length == 4) {
 249                         version = IVAL(t->u.equality.value.data, 0);
 250                 }
 251                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 252                     t->u.equality.value.length == 4) {
 253                         acct_control = IVAL(t->u.equality.value.data, 0);
 254                 }
 255         }
 256
 257         if (domain_guid == NULL && domain == NULL) {
 258                 domain = lp_realm();
 259         }
 260
 261         if (version == -1) {
 262                 goto failed;
 263         }
 264
 265         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 266                  domain, host, user, version, domain_guid));
 267
 268         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 269                                       user, src->addr,
 270                                       version, &netlogon);
 271         if (!NT_STATUS_IS_OK(status)) {
 272                 goto failed;
 273         }
 274
 275         status = cldap_netlogon_reply(cldap, message_id, src, version,
 276                                       &netlogon);
 277         if (!NT_STATUS_IS_OK(status)) {
 278                 goto failed;
 279         }
 280
 281         talloc_free(tmp_ctx);
 282         return;
 283
 284 failed:
 285         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 286                  domain, host, version, nt_errstr(status)));
 287         talloc_free(tmp_ctx);
 288         cldap_empty_reply(cldap, message_id, src);
 289 }