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 #include "librpc/gen_ndr/ndr_misc.h"
  30 #include "dsdb/samdb/samdb.h"
  31 #include "auth/auth.h"
  32 #include "db_wrap.h"
  33 #include "system/network.h"
  34 #include "netif/netif.h"
  35
  36 /*
  37   fill in the cldap netlogon union for a given version
  38 */
  39 static NTSTATUS cldapd_netlogon_fill(struct cldapd_server *cldapd,
  40                                      TALLOC_CTX *mem_ctx,
  41                                      const char *domain,
  42                                      const char *domain_guid,
  43                                      const char *user,
  44                                      const char *src_address,
  45                                      uint32_t version,
  46                                      union nbt_cldap_netlogon *netlogon)
  47 {
  48         const char *ref_attrs[] = {"nETBIOSName", NULL};
  49         const char *dom_attrs[] = {"dnsDomain", "objectGUID", NULL};
  50         struct ldb_message **ref_res, **dom_res;
  51         int ret;
  52         const char **services = lp_server_services();
  53         uint32_t server_type;
  54         const char *pdc_name;
  55         struct GUID domain_uuid;
  56         const char *realm;
  57         const char *dns_domain;
  58         const char *pdc_dns_name;
  59         const char *flatname;
  60         const char *site_name;
  61         const char *site_name2;
  62         const char *pdc_ip;
  63
  64         if (cldapd->samctx == NULL) {
  65                 cldapd->samctx = samdb_connect(cldapd, anonymous_session(cldapd));
  66                 if (cldapd->samctx == NULL) {
  67                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  68                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  69                 }
  70         }
  71
  72         /* the domain has an optional trailing . */
  73         if (domain && domain[strlen(domain)-1] == '.') {
  74                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  75         }
  76
  77         /* try and find the domain */
  78         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &dom_res, dom_attrs,
  79                            "(&(objectClass=domainDNS)(|(dnsDomain=%s)(objectGUID=%s)))",
  80                            domain?domain:"",
  81                            domain_guid?domain_guid:"");
  82         if (ret != 1) {
  83                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  84                 return NT_STATUS_NO_SUCH_DOMAIN;
  85         }
  86
  87         /* try and find the domain */
  88         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &ref_res, ref_attrs,
  89                            "(&(objectClass=crossRef)(ncName=%s))",
  90                            ldb_dn_linearize(mem_ctx, dom_res[0]->dn));
  91         if (ret != 1) {
  92                 DEBUG(2,("Unable to find referece to '%s' in sam\n",
  93                          ldb_dn_linearize(mem_ctx, dom_res[0]->dn)));
  94                 return NT_STATUS_NO_SUCH_DOMAIN;
  95         }
  96
  97         server_type      =
  98                 NBT_SERVER_PDC | NBT_SERVER_GC |
  99                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
 100                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
 101                 NBT_SERVER_GOOD_TIMESERV;
 102
 103         if (str_list_check(services, "ldap")) {
 104                 server_type |= NBT_SERVER_LDAP;
 105         }
 106
 107         if (str_list_check(services, "kdc")) {
 108                 server_type |= NBT_SERVER_KDC;
 109         }
 110
 111         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
 112         domain_uuid      = samdb_result_guid(dom_res[0], "objectGUID");
 113         realm            = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 114         dns_domain       = samdb_result_string(dom_res[0], "dnsDomain", lp_realm());
 115         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
 116                                            strlower_talloc(mem_ctx, lp_netbios_name()),
 117                                            dns_domain);
 118
 119         flatname         = samdb_result_string(ref_res[0], "nETBIOSName", lp_workgroup());
 120         site_name        = "Default-First-Site-Name";
 121         site_name2       = "Default-First-Site-Name";
 122         pdc_ip           = iface_best_ip(src_address);
 123
 124         ZERO_STRUCTP(netlogon);
 125
 126         switch (version & 0xF) {
 127         case 0:
 128         case 1:
 129                 netlogon->logon1.type        = (user?19+2:19);
 130                 netlogon->logon1.pdc_name    = pdc_name;
 131                 netlogon->logon1.user_name   = user;
 132                 netlogon->logon1.domain_name = flatname;
 133                 netlogon->logon1.nt_version  = 1;
 134                 netlogon->logon1.lmnt_token  = 0xFFFF;
 135                 netlogon->logon1.lm20_token  = 0xFFFF;
 136                 break;
 137         case 2:
 138         case 3:
 139                 netlogon->logon3.type         = (user?19+2:19);
 140                 netlogon->logon3.pdc_name     = pdc_name;
 141                 netlogon->logon3.user_name    = user;
 142                 netlogon->logon3.domain_name  = flatname;
 143                 netlogon->logon3.domain_uuid  = domain_uuid;
 144                 netlogon->logon3.forest       = realm;
 145                 netlogon->logon3.dns_domain   = dns_domain;
 146                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 147                 netlogon->logon3.pdc_ip       = pdc_ip;
 148                 netlogon->logon3.server_type  = server_type;
 149                 netlogon->logon3.lmnt_token   = 0xFFFF;
 150                 netlogon->logon3.lm20_token   = 0xFFFF;
 151                 break;
 152         case 4:
 153         case 5:
 154         case 6:
 155         case 7:
 156                 netlogon->logon5.type         = (user?23+2:23);
 157                 netlogon->logon5.server_type  = server_type;
 158                 netlogon->logon5.domain_uuid  = domain_uuid;
 159                 netlogon->logon5.forest       = realm;
 160                 netlogon->logon5.dns_domain   = dns_domain;
 161                 netlogon->logon5.pdc_dns_name = pdc_dns_name;
 162                 netlogon->logon5.domain       = flatname;
 163                 netlogon->logon5.pdc_name     = lp_netbios_name();
 164                 netlogon->logon5.user_name    = user;
 165                 netlogon->logon5.site_name    = site_name;
 166                 netlogon->logon5.site_name2   = site_name2;
 167                 netlogon->logon5.lmnt_token   = 0xFFFF;
 168                 netlogon->logon5.lm20_token   = 0xFFFF;
 169                 break;
 170         default:
 171                 netlogon->logon13.type         = (user?23+2:23);
 172                 netlogon->logon13.server_type  = server_type;
 173                 netlogon->logon13.domain_uuid  = domain_uuid;
 174                 netlogon->logon13.forest       = realm;
 175                 netlogon->logon13.dns_domain   = dns_domain;
 176                 netlogon->logon13.pdc_dns_name = pdc_dns_name;
 177                 netlogon->logon13.domain       = flatname;
 178                 netlogon->logon13.pdc_name     = lp_netbios_name();
 179                 netlogon->logon13.user_name    = user;
 180                 netlogon->logon13.site_name    = site_name;
 181                 netlogon->logon13.site_name2   = site_name2;
 182                 netlogon->logon13.unknown      = 10;
 183                 netlogon->logon13.unknown2     = 2;
 184                 netlogon->logon13.pdc_ip       = pdc_ip;
 185                 netlogon->logon13.lmnt_token   = 0xFFFF;
 186                 netlogon->logon13.lm20_token   = 0xFFFF;
 187                 break;
 188         }
 189
 190         return NT_STATUS_OK;
 191 }
 192
 193
 194 /*
 195   handle incoming cldap requests
 196 */
 197 void cldapd_netlogon_request(struct cldap_socket *cldap,
 198                              uint32_t message_id,
 199                              struct ldb_parse_tree *tree,
 200                              struct socket_address *src)
 201 {
 202         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 203         int i;
 204         const char *domain = NULL;
 205         const char *host = NULL;
 206         const char *user = NULL;
 207         const char *domain_guid = NULL;
 208         const char *domain_sid = NULL;
 209         int acct_control = -1;
 210         int version = -1;
 211         union nbt_cldap_netlogon netlogon;
 212         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 213
 214         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 215
 216         if (tree->operation != LDB_OP_AND) goto failed;
 217
 218         /* extract the query elements */
 219         for (i=0;i<tree->u.list.num_elements;i++) {
 220                 struct ldb_parse_tree *t = tree->u.list.elements[i];
 221                 if (t->operation != LDB_OP_EQUALITY) goto failed;
 222                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
 223                         domain = talloc_strndup(tmp_ctx,
 224                                                 (const char *)t->u.equality.value.data,
 225                                                 t->u.equality.value.length);
 226                 }
 227                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
 228                         host = talloc_strndup(tmp_ctx,
 229                                               (const char *)t->u.equality.value.data,
 230                                               t->u.equality.value.length);
 231                 }
 232                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
 233                         NTSTATUS enc_status;
 234                         struct GUID guid;
 235                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 236                                                           t->u.equality.value, &guid);
 237                         if (NT_STATUS_IS_OK(enc_status)) {
 238                                 domain_guid = GUID_string(tmp_ctx, &guid);
 239                         }
 240                 }
 241                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
 242                         domain_sid = talloc_strndup(tmp_ctx,
 243                                                     (const char *)t->u.equality.value.data,
 244                                                     t->u.equality.value.length);
 245                 }
 246                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
 247                         user = talloc_strndup(tmp_ctx,
 248                                               (const char *)t->u.equality.value.data,
 249                                               t->u.equality.value.length);
 250                 }
 251                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
 252                     t->u.equality.value.length == 4) {
 253                         version = IVAL(t->u.equality.value.data, 0);
 254                 }
 255                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
 256                     t->u.equality.value.length == 4) {
 257                         acct_control = IVAL(t->u.equality.value.data, 0);
 258                 }
 259         }
 260
 261         if (domain_guid == NULL && domain == NULL) {
 262                 domain = lp_realm();
 263         }
 264
 265         if (version == -1) {
 266                 goto failed;
 267         }
 268
 269         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 270                  domain, host, user, version, domain_guid));
 271
 272         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 273                                       user, src->addr,
 274                                       version, &netlogon);
 275         if (!NT_STATUS_IS_OK(status)) {
 276                 goto failed;
 277         }
 278
 279         status = cldap_netlogon_reply(cldap, message_id, src, version,
 280                                       &netlogon);
 281         if (!NT_STATUS_IS_OK(status)) {
 282                 goto failed;
 283         }
 284
 285         talloc_free(tmp_ctx);
 286         return;
 287
 288 failed:
 289         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 290                  domain, host, version, nt_errstr(status)));
 291         talloc_free(tmp_ctx);
 292         cldap_empty_reply(cldap, message_id, src);
 293 }