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
  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 *attrs[] = {"realm", "dnsDomain", "objectGUID", "name", NULL};
  43         struct ldb_message **res;
  44         int ret;
  45         const char **services = lp_server_services();
  46         uint32_t server_type;
  47         const char *pdc_name;
  48         struct GUID domain_uuid;
  49         const char *realm;
  50         const char *dns_domain;
  51         const char *pdc_dns_name;
  52         const char *flatname;
  53         const char *site_name;
  54         const char *site_name2;
  55         const char *pdc_ip;
  56
  57         if (cldapd->samctx == NULL) {
  58                 cldapd->samctx = samdb_connect(mem_ctx);
  59                 if (cldapd->samctx == NULL) {
  60                         DEBUG(2,("Unable to open sam in cldap netlogon reply\n"));
  61                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
  62                 }
  63         }
  64
  65         /* the domain has an optional trailing . */
  66         if (domain && domain[strlen(domain)-1] == '.') {
  67                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
  68         }
  69
  70         /* try and find the domain */
  71         ret = gendb_search(cldapd->samctx, mem_ctx, NULL, &res, attrs,
  72                            "(&(objectClass=domainDNS)(|(dnsDomain=%s)(objectGUID=%s)))",
  73                            domain?domain:"",
  74                            domain_guid?domain_guid:"");
  75         if (ret != 1) {
  76                 DEBUG(2,("Unable to find domain '%s' in sam\n", domain));
  77                 return NT_STATUS_NO_SUCH_DOMAIN;
  78         }
  79
  80         server_type      =
  81                 NBT_SERVER_PDC | NBT_SERVER_GC |
  82                 NBT_SERVER_DS | NBT_SERVER_TIMESERV |
  83                 NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
  84                 NBT_SERVER_GOOD_TIMESERV;
  85
  86         if (lp_parm_bool(-1, "krb5", "kdc", True)) {
  87                 server_type |= NBT_SERVER_KDC;
  88         }
  89         if (str_list_check(services, "ldap")) {
  90                 server_type |= NBT_SERVER_LDAP;
  91         }
  92
  93         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name());
  94         domain_uuid      = samdb_result_guid(res[0], "objectGUID");
  95         realm            = samdb_result_string(res[0], "realm", lp_realm());
  96         dns_domain       = samdb_result_string(res[0], "dnsDomain", lp_realm());
  97         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s",
  98                                            lp_netbios_name(), dns_domain);
  99         flatname         = samdb_result_string(res[0], "name", lp_workgroup());
 100         site_name        = "Default-First-Site-Name";
 101         site_name2       = "";
 102         pdc_ip           = iface_best_ip(src_address);
 103
 104         ZERO_STRUCTP(netlogon);
 105
 106         switch (version & 0xF) {
 107         case 0:
 108         case 1:
 109                 netlogon->logon1.pdc_name    = pdc_name;
 110                 netlogon->logon1.user_name   = user;
 111                 netlogon->logon1.domain_name = flatname;
 112                 netlogon->logon1.nt_version  = 1;
 113                 netlogon->logon1.lmnt_token  = 0xFFFF;
 114                 netlogon->logon1.lm20_token  = 0xFFFF;
 115                 break;
 116         case 2:
 117         case 3:
 118                 netlogon->logon2.pdc_name     = pdc_name;
 119                 netlogon->logon2.user_name    = user;
 120                 netlogon->logon2.domain_name  = flatname;
 121                 netlogon->logon2.domain_uuid  = domain_uuid;
 122                 netlogon->logon2.forest       = realm;
 123                 netlogon->logon2.dns_domain   = dns_domain;
 124                 netlogon->logon2.pdc_dns_name = pdc_dns_name;
 125                 netlogon->logon2.pdc_ip       = pdc_ip;
 126                 netlogon->logon2.server_type  = server_type;
 127                 netlogon->logon2.nt_version   = 3;
 128                 netlogon->logon2.lmnt_token   = 0xFFFF;
 129                 netlogon->logon2.lm20_token   = 0xFFFF;
 130                 break;
 131         case 4:
 132         case 5:
 133         case 6:
 134         case 7:
 135                 netlogon->logon3.server_type  = server_type;
 136                 netlogon->logon3.domain_uuid  = domain_uuid;
 137                 netlogon->logon3.forest       = realm;
 138                 netlogon->logon3.dns_domain   = dns_domain;
 139                 netlogon->logon3.pdc_dns_name = pdc_dns_name;
 140                 netlogon->logon3.domain       = flatname;
 141                 netlogon->logon3.pdc_name     = pdc_name;
 142                 netlogon->logon3.user_name    = user;
 143                 netlogon->logon3.site_name    = site_name;
 144                 netlogon->logon3.site_name2   = site_name2;
 145                 netlogon->logon3.nt_version   = 3;
 146                 netlogon->logon3.lmnt_token   = 0xFFFF;
 147                 netlogon->logon3.lm20_token   = 0xFFFF;
 148                 break;
 149         default:
 150                 netlogon->logon4.server_type  = server_type;
 151                 netlogon->logon4.domain_uuid  = domain_uuid;
 152                 netlogon->logon4.forest       = realm;
 153                 netlogon->logon4.dns_domain   = dns_domain;
 154                 netlogon->logon4.pdc_dns_name = pdc_dns_name;
 155                 netlogon->logon4.domain       = flatname;
 156                 netlogon->logon4.pdc_name     = lp_netbios_name();
 157                 netlogon->logon4.user_name    = user;
 158                 netlogon->logon4.site_name    = site_name;
 159                 netlogon->logon4.site_name2   = site_name2;
 160                 netlogon->logon4.unknown      = 10;
 161                 netlogon->logon4.unknown2     = 2;
 162                 netlogon->logon4.pdc_ip       = pdc_ip;
 163                 netlogon->logon4.nt_version   = 5;
 164                 netlogon->logon4.lmnt_token   = 0xFFFF;
 165                 netlogon->logon4.lm20_token   = 0xFFFF;
 166                 break;
 167         }
 168
 169         return NT_STATUS_OK;
 170 }
 171
 172
 173 /*
 174   handle incoming cldap requests
 175 */
 176 void cldapd_netlogon_request(struct cldap_socket *cldap,
 177                              uint32_t message_id,
 178                              const char *filter,
 179                              const char *src_address, int src_port)
 180 {
 181         struct cldapd_server *cldapd = talloc_get_type(cldap->incoming.private, struct cldapd_server);
 182         struct ldap_parse_tree *tree;
 183         int i;
 184         const char *domain = NULL;
 185         const char *host = NULL;
 186         const char *user = "";
 187         const char *domain_guid = NULL;
 188         const char *domain_sid = NULL;
 189         int acct_control = -1;
 190         int version = -1;
 191         union nbt_cldap_netlogon netlogon;
 192         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 193
 194         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
 195
 196         DEBUG(5,("cldap filter='%s'\n", filter));
 197
 198         tree = ldap_parse_filter_string(tmp_ctx, filter);
 199         if (tree == NULL) goto failed;
 200
 201         if (tree->operation != LDAP_OP_AND) goto failed;
 202
 203         /* extract the query elements */
 204         for (i=0;i<tree->u.list.num_elements;i++) {
 205                 struct ldap_parse_tree *t = tree->u.list.elements[i];
 206                 if (t->operation != LDAP_OP_SIMPLE) goto failed;
 207                 if (strcasecmp(t->u.simple.attr, "DnsDomain") == 0) {
 208                         domain = talloc_strndup(tmp_ctx,
 209                                                 t->u.simple.value.data,
 210                                                 t->u.simple.value.length);
 211                 }
 212                 if (strcasecmp(t->u.simple.attr, "Host") == 0) {
 213                         host = talloc_strndup(tmp_ctx,
 214                                               t->u.simple.value.data,
 215                                               t->u.simple.value.length);
 216                 }
 217                 if (strcasecmp(t->u.simple.attr, "DomainGuid") == 0) {
 218                         NTSTATUS enc_status;
 219                         struct GUID guid;
 220                         enc_status = ldap_decode_ndr_GUID(tmp_ctx,
 221                                                           t->u.simple.value, &guid);
 222                         if (NT_STATUS_IS_OK(enc_status)) {
 223                                 domain_guid = GUID_string(tmp_ctx, &guid);
 224                         }
 225                 }
 226                 if (strcasecmp(t->u.simple.attr, "DomainSid") == 0) {
 227                         domain_sid = talloc_strndup(tmp_ctx,
 228                                                     t->u.simple.value.data,
 229                                                     t->u.simple.value.length);
 230                 }
 231                 if (strcasecmp(t->u.simple.attr, "User") == 0) {
 232                         user = talloc_strndup(tmp_ctx,
 233                                               t->u.simple.value.data,
 234                                               t->u.simple.value.length);
 235                 }
 236                 if (strcasecmp(t->u.simple.attr, "NtVer") == 0 &&
 237                     t->u.simple.value.length == 4) {
 238                         version = IVAL(t->u.simple.value.data, 0);
 239                 }
 240                 if (strcasecmp(t->u.simple.attr, "AAC") == 0 &&
 241                     t->u.simple.value.length == 4) {
 242                         acct_control = IVAL(t->u.simple.value.data, 0);
 243                 }
 244         }
 245
 246         if (domain_guid == NULL && domain == NULL) {
 247                 domain = lp_realm();
 248         }
 249
 250         if (version == -1) {
 251                 goto failed;
 252         }
 253
 254         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
 255                  domain, host, user, version, domain_guid));
 256
 257         status = cldapd_netlogon_fill(cldapd, tmp_ctx, domain, domain_guid,
 258                                       user, src_address,
 259                                       version, &netlogon);
 260         if (!NT_STATUS_IS_OK(status)) {
 261                 goto failed;
 262         }
 263
 264         status = cldap_netlogon_reply(cldap, message_id, src_address, src_port, version,
 265                                       &netlogon);
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 goto failed;
 268         }
 269
 270         talloc_free(tmp_ctx);
 271         return;
 272
 273 failed:
 274         DEBUG(0,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
 275                  domain, host, version, nt_errstr(status)));
 276         talloc_free(tmp_ctx);
 277         cldap_empty_reply(cldap, message_id, src_address, src_port);
 278 }