b06fd609f29239bc5a7da767dfc96f767b742860
[ira/wip.git] / 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    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
8    
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 3 of the License, or
12    (at your option) any later version.
13    
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18    
19    You should have received a copy of the GNU General Public License
20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "lib/ldb/include/ldb.h"
25 #include "lib/ldb/include/ldb_errors.h"
26 #include "lib/events/events.h"
27 #include "smbd/service_task.h"
28 #include "cldap_server/cldap_server.h"
29 #include "librpc/gen_ndr/ndr_misc.h"
30 #include "libcli/ldap/ldap_ndr.h"
31 #include "libcli/security/security.h"
32 #include "dsdb/samdb/samdb.h"
33 #include "auth/auth.h"
34 #include "ldb_wrap.h"
35 #include "system/network.h"
36 #include "lib/socket/netif.h"
37 #include "param/param.h"
38 #include "../lib/tsocket/tsocket.h"
39
40 /*
41   fill in the cldap netlogon union for a given version
42 */
43 NTSTATUS fill_netlogon_samlogon_response(struct ldb_context *sam_ctx,
44                                          TALLOC_CTX *mem_ctx,
45                                          const char *domain,
46                                          const char *netbios_domain,
47                                          struct dom_sid *domain_sid,
48                                          const char *domain_guid,
49                                          const char *user,
50                                          uint32_t acct_control,
51                                          const char *src_address,
52                                          uint32_t version,
53                                          struct loadparm_context *lp_ctx,
54                                          struct netlogon_samlogon_response *netlogon)
55 {
56         const char *dom_attrs[] = {"objectGUID", NULL};
57         const char *none_attrs[] = {NULL};
58         struct ldb_result *dom_res = NULL, *user_res = NULL;
59         int ret;
60         const char **services = lp_server_services(lp_ctx);
61         uint32_t server_type;
62         const char *pdc_name;
63         struct GUID domain_uuid;
64         const char *dns_domain;
65         const char *pdc_dns_name;
66         const char *flatname;
67         const char *server_site;
68         const char *client_site;
69         const char *pdc_ip;
70         struct ldb_dn *domain_dn = NULL;
71         struct interface *ifaces;
72         bool user_known;
73         NTSTATUS status;
74
75         /* the domain has an optional trailing . */
76         if (domain && domain[strlen(domain)-1] == '.') {
77                 domain = talloc_strndup(mem_ctx, domain, strlen(domain)-1);
78         }
79
80         if (domain && strcasecmp_m(domain, lp_dnsdomain(lp_ctx)) == 0) {
81                 domain_dn = ldb_get_default_basedn(sam_ctx);
82         }
83
84         if (netbios_domain && strcasecmp_m(domain, lp_sam_name(lp_ctx))) {
85                 domain_dn = ldb_get_default_basedn(sam_ctx);
86         }
87
88         if (domain_dn) {
89                 ret = ldb_search(sam_ctx, mem_ctx, &dom_res,
90                                  domain_dn, LDB_SCOPE_BASE, dom_attrs,
91                                  "objectClass=domain");
92                 if (ret != LDB_SUCCESS) {
93                         DEBUG(2,("Error finding domain '%s'/'%s' in sam: %s\n", domain, ldb_dn_get_linearized(domain_dn), ldb_errstring(sam_ctx)));
94                         return NT_STATUS_NO_SUCH_DOMAIN;
95                 }
96                 if (dom_res->count != 1) {
97                         DEBUG(2,("Error finding domain '%s'/'%s' in sam\n", domain, ldb_dn_get_linearized(domain_dn)));
98                         return NT_STATUS_NO_SUCH_DOMAIN;
99                 }
100         }
101
102         if ((dom_res == NULL || dom_res->count == 0) && (domain_guid || domain_sid)) {
103
104                 if (domain_guid) {
105                         struct GUID binary_guid;
106                         struct ldb_val guid_val;
107                         enum ndr_err_code ndr_err;
108
109                         /* By this means, we ensure we don't have funny stuff in the GUID */
110
111                         status = GUID_from_string(domain_guid, &binary_guid);
112                         if (!NT_STATUS_IS_OK(status)) {
113                                 return status;
114                         }
115
116                         /* And this gets the result into the binary format we want anyway */
117                         ndr_err = ndr_push_struct_blob(&guid_val, mem_ctx, NULL, &binary_guid,
118                                                        (ndr_push_flags_fn_t)ndr_push_GUID);
119                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
120                                 return NT_STATUS_INVALID_PARAMETER;
121                         }
122                         ret = ldb_search(sam_ctx, mem_ctx, &dom_res,
123                                                  NULL, LDB_SCOPE_SUBTREE, 
124                                                  dom_attrs, 
125                                                  "(&(objectCategory=DomainDNS)(objectGUID=%s))", 
126                                                  ldb_binary_encode(mem_ctx, guid_val));
127                 } else { /* domain_sid case */
128                         struct dom_sid *sid;
129                         struct ldb_val sid_val;
130                         enum ndr_err_code ndr_err;
131                         
132                         /* Rather than go via the string, just push into the NDR form */
133                         ndr_err = ndr_push_struct_blob(&sid_val, mem_ctx, NULL, &sid,
134                                                        (ndr_push_flags_fn_t)ndr_push_dom_sid);
135                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
136                                 return NT_STATUS_INVALID_PARAMETER;
137                         }
138
139                         ret = ldb_search(sam_ctx, mem_ctx, &dom_res,
140                                                  NULL, LDB_SCOPE_SUBTREE, 
141                                                  dom_attrs, 
142                                                  "(&(objectCategory=DomainDNS)(objectSID=%s))", 
143                                                  ldb_binary_encode(mem_ctx, sid_val));
144                 }
145                 
146                 if (ret != LDB_SUCCESS) {
147                         DEBUG(2,("Unable to find referece to GUID '%s' or SID %s in sam: %s\n",
148                                  domain_guid, dom_sid_string(mem_ctx, domain_sid),
149                                  ldb_errstring(sam_ctx)));
150                         return NT_STATUS_NO_SUCH_DOMAIN;
151                 } else if (dom_res->count == 1) {
152                         /* Ok, now just check it is our domain */
153                         
154                         if (ldb_dn_compare(ldb_get_default_basedn(sam_ctx), dom_res->msgs[0]->dn) != 0) {
155                                 return NT_STATUS_NO_SUCH_DOMAIN;
156                         }
157                 } else if (dom_res->count > 1) {
158                         return NT_STATUS_NO_SUCH_DOMAIN;
159                 }
160         }
161
162
163         if ((dom_res == NULL || dom_res->count == 0)) {
164                 DEBUG(2,("Unable to find domain with name %s or GUID {%s}\n", domain, domain_guid));
165                 return NT_STATUS_NO_SUCH_DOMAIN;
166         }
167
168         /* work around different inputs for not-specified users */
169         if (!user) {
170                 user = "";
171         }
172
173         /* Enquire about any valid username with just a CLDAP packet -
174          * if kerberos didn't also do this, the security folks would
175          * scream... */
176         if (user[0]) {                                                  \
177                 /* Only allow some bits to be enquired:  [MS-ATDS] 7.3.3.2 */
178                 if (acct_control == (uint32_t)-1) {
179                         acct_control = 0;
180                 }
181                 acct_control = acct_control & (ACB_TEMPDUP | ACB_NORMAL | ACB_DOMTRUST | ACB_WSTRUST | ACB_SVRTRUST);
182
183                 /* We must exclude disabled accounts, but otherwise do the bitwise match the client asked for */
184                 ret = ldb_search(sam_ctx, mem_ctx, &user_res,
185                                          dom_res->msgs[0]->dn, LDB_SCOPE_SUBTREE, 
186                                          none_attrs, 
187                                          "(&(objectClass=user)(samAccountName=%s)"
188                                          "(!(userAccountControl:" LDB_OID_COMPARATOR_AND ":=%u))"
189                                          "(userAccountControl:" LDB_OID_COMPARATOR_OR ":=%u))", 
190                                          ldb_binary_encode_string(mem_ctx, user),
191                                          UF_ACCOUNTDISABLE, ds_acb2uf(acct_control));
192                 if (ret != LDB_SUCCESS) {
193                         DEBUG(2,("Unable to find referece to user '%s' with ACB 0x%8x under %s: %s\n",
194                                  user, acct_control, ldb_dn_get_linearized(dom_res->msgs[0]->dn),
195                                  ldb_errstring(sam_ctx)));
196                         return NT_STATUS_NO_SUCH_USER;
197                 } else if (user_res->count == 1) {
198                         user_known = true;
199                 } else {
200                         user_known = false;
201                 }
202
203         } else {
204                 user_known = true;
205         }
206                 
207         server_type      = 
208                 DS_SERVER_DS | DS_SERVER_TIMESERV |
209                 DS_SERVER_CLOSEST | DS_SERVER_WRITABLE | 
210                 DS_SERVER_GOOD_TIMESERV;
211
212 #if 0
213         /* w2k8-r2 as a DC does not claim these */
214         server_type |= DS_DNS_CONTROLLER | DS_DNS_DOMAIN;
215 #endif
216
217         if (samdb_is_pdc(sam_ctx)) {
218                 int *domainFunctionality;
219                 server_type |= DS_SERVER_PDC;
220                 domainFunctionality = talloc_get_type(ldb_get_opaque(sam_ctx, "domainFunctionality"), int);
221                 if (domainFunctionality && *domainFunctionality >= DS_DOMAIN_FUNCTION_2008) {
222                         server_type |= DS_SERVER_FULL_SECRET_DOMAIN_6;
223                 }
224         }
225
226         if (samdb_is_gc(sam_ctx)) {
227                 server_type |= DS_SERVER_GC;
228         }
229
230         if (str_list_check(services, "ldap")) {
231                 server_type |= DS_SERVER_LDAP;
232         }
233
234         if (str_list_check(services, "kdc")) {
235                 server_type |= DS_SERVER_KDC;
236         }
237
238 #if 0
239         /* w2k8-r2 as a sole DC does not claim this */
240         if (ldb_dn_compare(ldb_get_root_basedn(sam_ctx), ldb_get_default_basedn(sam_ctx)) == 0) {
241                 server_type |= DS_DNS_FOREST_ROOT;
242         }
243 #endif
244
245         pdc_name         = talloc_asprintf(mem_ctx, "\\\\%s", lp_netbios_name(lp_ctx));
246         domain_uuid      = samdb_result_guid(dom_res->msgs[0], "objectGUID");
247         dns_domain       = lp_dnsdomain(lp_ctx);
248         pdc_dns_name     = talloc_asprintf(mem_ctx, "%s.%s", 
249                                            strlower_talloc(mem_ctx, 
250                                                            lp_netbios_name(lp_ctx)), 
251                                            dns_domain);
252
253         flatname         = lp_sam_name(lp_ctx);
254         /* FIXME: Hardcoded site names */
255         server_site      = "Default-First-Site-Name";
256         client_site      = "Default-First-Site-Name";
257         load_interfaces(mem_ctx, lp_interfaces(lp_ctx), &ifaces);
258         pdc_ip           = iface_best_ip(ifaces, src_address);
259
260         ZERO_STRUCTP(netlogon);
261
262         /* check if either of these bits is present */
263         if (version & (NETLOGON_NT_VERSION_5EX|NETLOGON_NT_VERSION_5EX_WITH_IP)) {
264                 uint32_t extra_flags = 0;
265                 netlogon->ntver = NETLOGON_NT_VERSION_5EX;
266
267                 /* could check if the user exists */
268                 if (user_known) {
269                         netlogon->data.nt5_ex.command      = LOGON_SAM_LOGON_RESPONSE_EX;
270                 } else {
271                         netlogon->data.nt5_ex.command      = LOGON_SAM_LOGON_USER_UNKNOWN_EX;
272                 }
273                 netlogon->data.nt5_ex.server_type  = server_type;
274                 netlogon->data.nt5_ex.domain_uuid  = domain_uuid;
275                 netlogon->data.nt5_ex.forest       = dns_domain;
276                 netlogon->data.nt5_ex.dns_domain   = dns_domain;
277                 netlogon->data.nt5_ex.pdc_dns_name = pdc_dns_name;
278                 netlogon->data.nt5_ex.domain       = flatname;
279                 netlogon->data.nt5_ex.pdc_name     = lp_netbios_name(lp_ctx);
280                 netlogon->data.nt5_ex.user_name    = user;
281                 netlogon->data.nt5_ex.server_site  = server_site;
282                 netlogon->data.nt5_ex.client_site  = client_site;
283
284                 if (version & NETLOGON_NT_VERSION_5EX_WITH_IP) {
285                         /* Clearly this needs to be fixed up for IPv6 */
286                         extra_flags = NETLOGON_NT_VERSION_5EX_WITH_IP;
287                         netlogon->data.nt5_ex.sockaddr.sockaddr_family    = 2;
288                         netlogon->data.nt5_ex.sockaddr.pdc_ip       = pdc_ip;
289                         netlogon->data.nt5_ex.sockaddr.remaining = data_blob_talloc_zero(mem_ctx, 8);
290                 }
291                 netlogon->data.nt5_ex.nt_version   = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5EX|extra_flags;
292                 netlogon->data.nt5_ex.lmnt_token   = 0xFFFF;
293                 netlogon->data.nt5_ex.lm20_token   = 0xFFFF;
294
295         } else if (version & NETLOGON_NT_VERSION_5) {
296                 netlogon->ntver = NETLOGON_NT_VERSION_5;
297
298                 /* could check if the user exists */
299                 if (user_known) {
300                         netlogon->data.nt5.command      = LOGON_SAM_LOGON_RESPONSE;
301                 } else {
302                         netlogon->data.nt5.command      = LOGON_SAM_LOGON_USER_UNKNOWN;
303                 }
304                 netlogon->data.nt5.pdc_name     = pdc_name;
305                 netlogon->data.nt5.user_name    = user;
306                 netlogon->data.nt5.domain_name  = flatname;
307                 netlogon->data.nt5.domain_uuid  = domain_uuid;
308                 netlogon->data.nt5.forest       = dns_domain;
309                 netlogon->data.nt5.dns_domain   = dns_domain;
310                 netlogon->data.nt5.pdc_dns_name = pdc_dns_name;
311                 netlogon->data.nt5.pdc_ip       = pdc_ip;
312                 netlogon->data.nt5.server_type  = server_type;
313                 netlogon->data.nt5.nt_version   = NETLOGON_NT_VERSION_1|NETLOGON_NT_VERSION_5;
314                 netlogon->data.nt5.lmnt_token   = 0xFFFF;
315                 netlogon->data.nt5.lm20_token   = 0xFFFF;
316
317         } else /* (version & NETLOGON_NT_VERSION_1) and all other cases */ {
318                 netlogon->ntver = NETLOGON_NT_VERSION_1;
319                 /* could check if the user exists */
320                 if (user_known) {
321                         netlogon->data.nt4.command      = LOGON_SAM_LOGON_RESPONSE;
322                 } else {
323                         netlogon->data.nt4.command      = LOGON_SAM_LOGON_USER_UNKNOWN;
324                 }
325                 netlogon->data.nt4.server      = pdc_name;
326                 netlogon->data.nt4.user_name   = user;
327                 netlogon->data.nt4.domain      = flatname;
328                 netlogon->data.nt4.nt_version  = NETLOGON_NT_VERSION_1;
329                 netlogon->data.nt4.lmnt_token  = 0xFFFF;
330                 netlogon->data.nt4.lm20_token  = 0xFFFF;
331         }
332
333         return NT_STATUS_OK;
334 }
335
336
337 /*
338   handle incoming cldap requests
339 */
340 void cldapd_netlogon_request(struct cldap_socket *cldap,
341                              struct cldapd_server *cldapd,
342                              TALLOC_CTX *tmp_ctx,
343                              uint32_t message_id,
344                              struct ldb_parse_tree *tree,
345                              struct tsocket_address *src)
346 {
347         int i;
348         const char *domain = NULL;
349         const char *host = NULL;
350         const char *user = NULL;
351         const char *domain_guid = NULL;
352         const char *domain_sid = NULL;
353         int acct_control = -1;
354         int version = -1;
355         struct netlogon_samlogon_response netlogon;
356         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
357
358         if (tree->operation != LDB_OP_AND) goto failed;
359
360         /* extract the query elements */
361         for (i=0;i<tree->u.list.num_elements;i++) {
362                 struct ldb_parse_tree *t = tree->u.list.elements[i];
363                 if (t->operation != LDB_OP_EQUALITY) goto failed;
364                 if (strcasecmp(t->u.equality.attr, "DnsDomain") == 0) {
365                         domain = talloc_strndup(tmp_ctx, 
366                                                 (const char *)t->u.equality.value.data,
367                                                 t->u.equality.value.length);
368                 }
369                 if (strcasecmp(t->u.equality.attr, "Host") == 0) {
370                         host = talloc_strndup(tmp_ctx, 
371                                               (const char *)t->u.equality.value.data,
372                                               t->u.equality.value.length);
373                 }
374                 if (strcasecmp(t->u.equality.attr, "DomainGuid") == 0) {
375                         NTSTATUS enc_status;
376                         struct GUID guid;
377                         enc_status = ldap_decode_ndr_GUID(tmp_ctx, 
378                                                           t->u.equality.value, &guid);
379                         if (NT_STATUS_IS_OK(enc_status)) {
380                                 domain_guid = GUID_string(tmp_ctx, &guid);
381                         }
382                 }
383                 if (strcasecmp(t->u.equality.attr, "DomainSid") == 0) {
384                         domain_sid = talloc_strndup(tmp_ctx, 
385                                                     (const char *)t->u.equality.value.data,
386                                                     t->u.equality.value.length);
387                 }
388                 if (strcasecmp(t->u.equality.attr, "User") == 0) {
389                         user = talloc_strndup(tmp_ctx, 
390                                               (const char *)t->u.equality.value.data,
391                                               t->u.equality.value.length);
392                 }
393                 if (strcasecmp(t->u.equality.attr, "NtVer") == 0 &&
394                     t->u.equality.value.length == 4) {
395                         version = IVAL(t->u.equality.value.data, 0);
396                 }
397                 if (strcasecmp(t->u.equality.attr, "AAC") == 0 &&
398                     t->u.equality.value.length == 4) {
399                         acct_control = IVAL(t->u.equality.value.data, 0);
400                 }
401         }
402
403         if (domain_guid == NULL && domain == NULL) {
404                 domain = lp_dnsdomain(cldapd->task->lp_ctx);
405         }
406
407         if (version == -1) {
408                 goto failed;
409         }
410
411         DEBUG(5,("cldap netlogon query domain=%s host=%s user=%s version=%d guid=%s\n",
412                  domain, host, user, version, domain_guid));
413
414         status = fill_netlogon_samlogon_response(cldapd->samctx, tmp_ctx, domain, NULL, NULL, domain_guid,
415                                                  user, acct_control,
416                                                  tsocket_address_inet_addr_string(src, tmp_ctx),
417                                                  version, cldapd->task->lp_ctx, &netlogon);
418         if (!NT_STATUS_IS_OK(status)) {
419                 goto failed;
420         }
421
422         status = cldap_netlogon_reply(cldap,
423                                       lp_iconv_convenience(cldapd->task->lp_ctx),
424                                       message_id, src, version,
425                                       &netlogon);
426         if (!NT_STATUS_IS_OK(status)) {
427                 goto failed;
428         }
429
430         return;
431         
432 failed:
433         DEBUG(2,("cldap netlogon query failed domain=%s host=%s version=%d - %s\n",
434                  domain, host, version, nt_errstr(status)));
435         cldap_empty_reply(cldap, message_id, src);
436 }