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 #include "db_wrap.h"
  32 #include "system/network.h"
  33 #include "netif/netif.h"
  34
  35 /*
  36   fill in the cldap netlogon union for a given version
  37 */
  38 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  39                                      TALLOC_CTX *mem_ctx,
  40                                      const char *domain,
  41                                      const char *domain_guid,
  42                                      const char *user,
  43                                      const char *src_address,
  44                                      uint32_t version,
  45                                      union nbt_cldap_netlogon *netlogon)
  46 {
  47         const char *ref_attrs[] = {"nETBIOSName", NULL};
  48         const char *dom_attrs[] = {"dnsDomain", "objectGUID", NULL};
  49         struct ldb_message **ref_res, **dom_res;
  50         int ret;
  51         const char **services = lp_server_services();
  52         uint32_t server_type;
  53         const char *pdc_name;
  54         struct GUID domain_uuid;
  55         const char *realm;
  56         const char *dns_domain;
  57         const char *pdc_dns_name;
  58         const char *flatname;
  59         const char *site_name;
  60         const char *site_name2;
  61         const char *pdc_ip;
  62
  63         if (cldapd->samctx == NULL) {
  64                 cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
  65                 if (cldapd->samctx == NULL) {
  66                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  67                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  68                 }
  69         }
  70
  71         /* the domain has an optional trailing . */
  72         if (domain && domain[strlen(domain)-1] == '.') {
  73                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  74         }
  75
  76         /* try and find the domain */
  77         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
  78                            "(&(objectClass=domainDNS)(|(dnsDomain=%s)(objectGUID=%s)))",
  79                            domain?domain:"",
  80                            domain_guid?domain_guid:"");
  81         if (ret != 1) {
  82                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  83                 return NT_STATUS_NO_SUCH_DOMAIN;
  84         }
  85
  86         /* try and find the domain */
  87         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &ref_res, ref_attrs,
  88                            "(&(objectClass=crossRef)(ncName=%s))",
  89                            ldb_dn_linearize(mem_ctx, dom_res[0]->dn));
  90         if (ret != 1) {
  91                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
  92                          ldb_dn_linearize(mem_ctx, dom_res[0]->dn)));
  93                 return NT_STATUS_NO_SUCH_DOMAIN;
  94         }
  95
  96         server_type      =
  97                 NBT_SERVER_PDC | NBT_SERVER_GC |
  98                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
  99                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 100                 NBT_SERVER_GOOD_TIMESERV;
 101
 102         if (str_list_check(services, "ldap")) {
 103                 server_type |= NBT_SERVER_LDAP;
 104         }
 105
 106         if (str_list_check(services, "kdc")) {
 107                 server_type |= NBT_SERVER_KDC;
 108         }
 109
 110         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 111         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 112         realm            = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 113         dns_domain       = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 114         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 115                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 116                                            dns_domain);
 117
 118         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 119         site_name        = "Default-First-Site-Name";
 120         site_name2       = "Default-First-Site-Name";
 121         pdc_ip           = iface_best_ip(src_address);
 122
 123         ZERO_STRUCTP(netlogon);
 124
 125         switch (version & 0xF) {
 126         case 0:
 127         case 1:
 128                 netlogon->logon1.type        = (user?19+2:19);
 129                 netlogon->logon1.pdc_name    = pdc_name;
 130                 netlogon->logon1.user_name   = user;
 131                 netlogon->logon1.domain_name = flatname;
 132                 netlogon->logon1.nt_version  = 1;
 133                 netlogon->logon1.lmnt_token  = 0xFFFF;
 134                 netlogon->logon1.lm20_token  = 0xFFFF;
 135                 break;
 136         case 2:
 137         case 3:
 138                 netlogon->logon3.type         = (user?19+2:19);
 139                 netlogon->logon3.pdc_name     = pdc_name;
 140                 netlogon->logon3.user_name    = user;
 141                 netlogon->logon3.domain_name  = flatname;
 142                 netlogon->logon3.domain_uuid  = domain_uuid;
 143                 netlogon->logon3.forest       = realm;
 144                 netlogon->logon3.dns_domain   = dns_domain;
 145                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 146                 netlogon->logon3.pdc_ip       = pdc_ip;
 147                 netlogon->logon3.server_type  = server_type;
 148                 netlogon->logon3.lmnt_token   = 0xFFFF;
 149                 netlogon->logon3.lm20_token   = 0xFFFF;
 150                 break;
 151         case 4:
 152         case 5:
 153         case 6:
 154         case 7:
 155                 netlogon->logon5.type         = (user?23+2:23);
 156                 netlogon->logon5.server_type  = server_type;
 157                 netlogon->logon5.domain_uuid  = domain_uuid;
 158                 netlogon->logon5.forest       = realm;
 159                 netlogon->logon5.dns_domain   = dns_domain;
 160                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 161                 netlogon->logon5.domain       = flatname;
 162                 netlogon->logon5.pdc_name     = lp_netbios_name();
 163                 netlogon->logon5.user_name    = user;
 164                 netlogon->logon5.site_name    = site_name;
 165                 netlogon->logon5.site_name2   = site_name2;
 166                 netlogon->logon5.lmnt_token   = 0xFFFF;
 167                 netlogon->logon5.lm20_token   = 0xFFFF;
 168                 break;
 169         default:
 170                 netlogon->logon13.type         = (user?23+2:23);
 171                 netlogon->logon13.server_type  = server_type;
 172                 netlogon->logon13.domain_uuid  = domain_uuid;
 173                 netlogon->logon13.forest       = realm;
 174                 netlogon->logon13.dns_domain   = dns_domain;
 175                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 176                 netlogon->logon13.domain       = flatname;
 177                 netlogon->logon13.pdc_name     = lp_netbios_name();
 178                 netlogon->logon13.user_name    = user;
 179                 netlogon->logon13.site_name    = site_name;
 180                 netlogon->logon13.site_name2   = site_name2;
 181                 netlogon->logon13.unknown      = 10;
 182                 netlogon->logon13.unknown2     = 2;
 183                 netlogon->logon13.pdc_ip       = pdc_ip;
 184                 netlogon->logon13.lmnt_token   = 0xFFFF;
 185                 netlogon->logon13.lm20_token   = 0xFFFF;
 186                 break;
 187         }
 188
 189         return NT_STATUS_OK;
 190 }
 191
 192
 193 /*
 194   handle incoming cldap requests
 195 */
 196 void cldapd_netlogon_request(struct cldap_socket *cldap,
 197                              uint32_t message_id,
 198                              struct ldb_parse_tree *tree,
 199                              struct socket_address *src)
 200 {
 201         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 202         int i;
 203         const char *domain = NULL;
 204         const char *host = NULL;
 205         const char *user = NULL;
 206         const char *domain_guid = NULL;
 207         const char *domain_sid = NULL;
 208         int acct_control = -1;
 209         int version = -1;
 210         union nbt_cldap_netlogon netlogon;
 211         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 212
 213         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 214
 215         if (tree->operation != LDB_OP_AND) goto failed;
 216
 217         /* extract the query elements */
 218         for (i=0;i<tree->u.list.num_elements;i++) {
 219                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 220                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 221                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 222                         domain = talloc_strndup(tmp_ctx,
 223                                                 t->u.equality.value.data,
 224                                                 t->u.equality.value.length);
 225                 }
 226                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 227                         host = talloc_strndup(tmp_ctx,
 228                                               t->u.equality.value.data,
 229                                               t->u.equality.value.length);
 230                 }
 231                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 232                         NTSTATUS enc_status;
 233                         struct GUID guid;
 234                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 235                                                           t->u.equality.value, &guid);
 236                         if (NT_STATUS_IS_OK(enc_status)) {
 237                                 domain_guid = GUID_string(tmp_ctx, &guid);
 238                         }
 239                 }
 240                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 241                         domain_sid = talloc_strndup(tmp_ctx,
 242                                                     t->u.equality.value.data,
 243                                                     t->u.equality.value.length);
 244                 }
 245                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 246                         user = talloc_strndup(tmp_ctx,
 247                                               t->u.equality.value.data,
 248                                               t->u.equality.value.length);
 249                 }
 250                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 251                     t->u.equality.value.length == 4) {
 252                         version = IVAL(t->u.equality.value.data, 0);
 253                 }
 254                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 255                     t->u.equality.value.length == 4) {
 256                         acct_control = IVAL(t->u.equality.value.data, 0);
 257                 }
 258         }
 259
 260         if (domain_guid == NULL && domain == NULL) {
 261                 domain = lp_realm();
 262         }
 263
 264         if (version == -1) {
 265                 goto failed;
 266         }
 267
 268         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 269                  domain, host, user, version, domain_guid));
 270
 271         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 272                                       user, src->addr,
 273                                       version, &netlogon);
 274         if (!NT_STATUS_IS_OK(status)) {
 275                 goto failed;
 276         }
 277
 278         status = cldap_netlogon_reply(cldap, message_id, src, version,
 279                                       &netlogon);
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 goto failed;
 282         }
 283
 284         talloc_free(tmp_ctx);
 285         return;
 286
 287 failed:
 288         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 289                  domain, host, version, nt_errstr(status)));
 290         talloc_free(tmp_ctx);
 291         cldap_empty_reply(cldap, message_id, src);
 292 }