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