s4:dsdb Fix crash from LDAP login of DOM\\
[ira/wip.git] / source4 / dsdb / samdb / cracknames.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    endpoint server for the drsuapi pipe
5    DsCrackNames()
6
7    Copyright (C) Stefan Metzmacher 2004
8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
9
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19
20    You should have received a copy of the GNU General Public License
21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "librpc/gen_ndr/drsuapi.h"
26 #include "rpc_server/common/common.h"
27 #include "lib/events/events.h"
28 #include "lib/ldb/include/ldb.h"
29 #include "lib/ldb/include/ldb_errors.h"
30 #include "system/kerberos.h"
31 #include "auth/kerberos/kerberos.h"
32 #include "libcli/ldap/ldap_ndr.h"
33 #include "libcli/security/security.h"
34 #include "librpc/gen_ndr/ndr_misc.h"
35 #include "auth/auth.h"
36 #include "../lib/util/util_ldb.h"
37 #include "dsdb/samdb/samdb.h"
38 #include "param/param.h"
39
40 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
41                                    struct smb_krb5_context *smb_krb5_context,
42                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
43                                    struct ldb_dn *name_dn, const char *name, 
44                                    const char *domain_filter, const char *result_filter, 
45                                    struct drsuapi_DsNameInfo1 *info1);
46 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
47                                         uint32_t format_offered, uint32_t format_desired,
48                                         struct ldb_dn *name_dn, const char *name, 
49                                         struct drsuapi_DsNameInfo1 *info1);
50
51 static WERROR dns_domain_from_principal(TALLOC_CTX *mem_ctx, struct smb_krb5_context *smb_krb5_context, 
52                                         const char *name, 
53                                         struct drsuapi_DsNameInfo1 *info1) 
54 {
55         krb5_error_code ret;
56         krb5_principal principal;
57         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
58         char *realm;
59         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name, 
60                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
61         if (ret) {
62                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
63                 return WERR_OK;
64         }
65
66         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
67         realm = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
68
69         info1->dns_domain_name  = talloc_strdup(mem_ctx, realm);
70         krb5_free_principal(smb_krb5_context->krb5_context, principal);
71
72         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
73
74         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
75         return WERR_OK;
76 }               
77
78 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx, 
79                                                       TALLOC_CTX *mem_ctx,
80                                                       const char *alias_from,
81                                                       char **alias_to)
82 {
83         int i;
84         int ret;
85         struct ldb_result *res;
86         struct ldb_message_element *spnmappings;
87         TALLOC_CTX *tmp_ctx;
88         struct ldb_dn *service_dn;
89         char *service_dn_str;
90
91         const char *directory_attrs[] = {
92                 "sPNMappings", 
93                 NULL
94         };
95
96         tmp_ctx = talloc_new(mem_ctx);
97         if (!tmp_ctx) {
98                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
99         }
100
101         service_dn = ldb_dn_new(tmp_ctx, ldb_ctx, "CN=Directory Service,CN=Windows NT,CN=Services");
102         if ( ! ldb_dn_add_base(service_dn, samdb_config_dn(ldb_ctx))) {
103                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
104         }
105         service_dn_str = ldb_dn_alloc_linearized(tmp_ctx, service_dn);
106         if ( ! service_dn_str) {
107                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
108         }
109
110         ret = ldb_search(ldb_ctx, tmp_ctx, &res, service_dn, LDB_SCOPE_BASE,
111                          directory_attrs, "(objectClass=nTDSService)");
112
113         if (ret != LDB_SUCCESS && ret != LDB_ERR_NO_SUCH_OBJECT) {
114                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
115                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
116         } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
117                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
118                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
119         } else if (res->count != 1) {
120                 talloc_free(res);
121                 DEBUG(1, ("ldb_search: dn: %s not found", service_dn_str));
122                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
123         }
124
125         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
126         if (!spnmappings || spnmappings->num_values == 0) {
127                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
128                 talloc_free(tmp_ctx);
129                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
130         }
131
132         for (i = 0; i < spnmappings->num_values; i++) {
133                 char *mapping, *p, *str;
134                 mapping = talloc_strdup(tmp_ctx, 
135                                         (const char *)spnmappings->values[i].data);
136                 if (!mapping) {
137                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
138                         talloc_free(tmp_ctx);
139                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
140                 }
141
142                 /* C string manipulation sucks */
143
144                 p = strchr(mapping, '=');
145                 if (!p) {
146                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n", 
147                                   service_dn_str, mapping));
148                         talloc_free(tmp_ctx);
149                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
150                 }
151                 p[0] = '\0';
152                 p++;
153                 do {
154                         str = p;
155                         p = strchr(p, ',');
156                         if (p) {
157                                 p[0] = '\0';
158                                 p++;
159                         }
160                         if (strcasecmp(str, alias_from) == 0) {
161                                 *alias_to = mapping;
162                                 talloc_steal(mem_ctx, mapping);
163                                 talloc_free(tmp_ctx);
164                                 return DRSUAPI_DS_NAME_STATUS_OK;
165                         }
166                 } while (p);
167         }
168         DEBUG(4, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
169         talloc_free(tmp_ctx);
170         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
171 }
172
173 /* When cracking a ServicePrincipalName, many services may be served
174  * by the host/ servicePrincipalName.  The incoming query is for cifs/
175  * but we translate it here, and search on host/.  This is done after
176  * the cifs/ entry has been searched for, making this a fallback */
177
178 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
179                                   struct smb_krb5_context *smb_krb5_context,
180                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
181                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
182 {
183         WERROR wret;
184         krb5_error_code ret;
185         krb5_principal principal;
186         const char *service, *dns_name;
187         char *new_service;
188         char *new_princ;
189         enum drsuapi_DsNameStatus namestatus;
190
191         /* parse principal */
192         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, 
193                                     name, KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
194         if (ret) {
195                 DEBUG(2, ("Could not parse principal: %s: %s",
196                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context, 
197                                                            ret, mem_ctx)));
198                 return WERR_NOMEM;
199         }
200
201         /* grab cifs/, http/ etc */
202
203         /* This is checked for in callers, but be safe */
204         if (principal->name.name_string.len < 2) {
205                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
206                 return WERR_OK;
207         }
208         service = principal->name.name_string.val[0];
209         dns_name = principal->name.name_string.val[1];
210
211         /* MAP it */
212         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context, 
213                                           sam_ctx, mem_ctx, 
214                                           service, &new_service);
215
216         if (namestatus == DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
217                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
218                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
219                 if (!info1->dns_domain_name) {
220                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
221                         return WERR_NOMEM;
222                 }
223                 return WERR_OK;
224         } else if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
225                 info1->status = namestatus;
226                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
227                 return WERR_OK;
228         }
229
230         /* ooh, very nasty playing around in the Principal... */
231         free(principal->name.name_string.val[0]);
232         principal->name.name_string.val[0] = strdup(new_service);
233         if (!principal->name.name_string.val[0]) {
234                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
235                 return WERR_NOMEM;
236         }
237
238         /* reform principal */
239         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal, 
240                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &new_princ);
241
242         if (ret) {
243                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
244                 return WERR_NOMEM;
245         }
246
247         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
248                                   new_princ, info1);
249         free(new_princ);
250         if (W_ERROR_IS_OK(wret) && (info1->status == DRSUAPI_DS_NAME_STATUS_NOT_FOUND)) {
251                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
252                 info1->dns_domain_name  = talloc_strdup(mem_ctx, dns_name);
253                 if (!info1->dns_domain_name) {
254                         wret = WERR_NOMEM;
255                 }
256         }
257         krb5_free_principal(smb_krb5_context->krb5_context, principal);
258         return wret;
259 }
260
261 /* Subcase of CrackNames, for the userPrincipalName */
262
263 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
264                              struct smb_krb5_context *smb_krb5_context,
265                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
266                              const char *name, struct drsuapi_DsNameInfo1 *info1)
267 {
268         int ldb_ret;
269         WERROR status;
270         const char *domain_filter = NULL;
271         const char *result_filter = NULL;
272         krb5_error_code ret;
273         krb5_principal principal;
274         char *realm;
275         char *unparsed_name_short;
276         const char *domain_attrs[] = { NULL };
277         struct ldb_result *domain_res = NULL;
278
279         /* Prevent recursion */
280         if (!name) {
281                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
282                 return WERR_OK;
283         }
284
285         ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name, 
286                                     KRB5_PRINCIPAL_PARSE_REQUIRE_REALM, &principal);
287         if (ret) {
288                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
289                 return WERR_OK;
290         }
291
292         realm = krb5_principal_get_realm(smb_krb5_context->krb5_context, principal);
293
294         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
295                                      samdb_partitions_dn(sam_ctx, mem_ctx), 
296                                      LDB_SCOPE_ONELEVEL,
297                                      domain_attrs,
298                                      "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
299                                      ldb_binary_encode_string(mem_ctx, realm), 
300                                      ldb_binary_encode_string(mem_ctx, realm));
301
302         if (ldb_ret != LDB_SUCCESS) {
303                 DEBUG(2, ("DsCrackNameUPN domain ref search failed: %s", ldb_errstring(sam_ctx)));
304                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
305                 return WERR_OK;
306         }
307
308         switch (domain_res->count) {
309         case 1:
310                 break;
311         case 0:
312                 return dns_domain_from_principal(mem_ctx, smb_krb5_context, 
313                                                  name, info1);
314         default:
315                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
316                 return WERR_OK;
317         }
318
319         ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal, 
320                                       KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
321         krb5_free_principal(smb_krb5_context->krb5_context, principal);
322
323         if (ret) {
324                 free(unparsed_name_short);
325                 return WERR_NOMEM;
326         }
327
328         /* This may need to be extended for more userPrincipalName variations */
329         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))", 
330                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
331
332         domain_filter = talloc_asprintf(mem_ctx, "(distinguishedName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
333
334         if (!result_filter || !domain_filter) {
335                 free(unparsed_name_short);
336                 return WERR_NOMEM;
337         }
338         status = DsCrackNameOneFilter(sam_ctx, mem_ctx, 
339                                       smb_krb5_context, 
340                                       format_flags, format_offered, format_desired, 
341                                       NULL, unparsed_name_short, domain_filter, result_filter, 
342                                       info1);
343         free(unparsed_name_short);
344
345         return status;
346 }
347
348 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
349
350 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
351                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
352                           const char *name, struct drsuapi_DsNameInfo1 *info1)
353 {
354         krb5_error_code ret;
355         const char *domain_filter = NULL;
356         const char *result_filter = NULL;
357         struct ldb_dn *name_dn = NULL;
358
359         struct smb_krb5_context *smb_krb5_context = NULL;
360
361         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
362         info1->dns_domain_name = NULL;
363         info1->result_name = NULL;
364
365         if (!name) {
366                 return WERR_INVALID_PARAM;
367         }
368
369         /* TODO: - fill the correct names in all cases!
370          *       - handle format_flags
371          */
372
373         /* here we need to set the domain_filter and/or the result_filter */
374         switch (format_offered) {
375         case DRSUAPI_DS_NAME_FORMAT_UNKNOWN:
376         {
377                 int i;
378                 enum drsuapi_DsNameFormat formats[] = {
379                         DRSUAPI_DS_NAME_FORMAT_FQDN_1779, DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
380                         DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT, DRSUAPI_DS_NAME_FORMAT_CANONICAL,
381                         DRSUAPI_DS_NAME_FORMAT_GUID, DRSUAPI_DS_NAME_FORMAT_DISPLAY,
382                         DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
383                         DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY,
384                         DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX
385                 };
386                 WERROR werr;
387                 for (i=0; i < ARRAY_SIZE(formats); i++) {
388                         werr = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, formats[i], format_desired, name, info1);
389                         if (!W_ERROR_IS_OK(werr)) {
390                                 return werr;
391                         }
392                         if (info1->status != DRSUAPI_DS_NAME_STATUS_NOT_FOUND) {
393                                 return werr;
394                         }
395                 }
396                 return werr;
397         }
398
399         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
400         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
401         {
402                 char *str, *s, *account;
403
404                 if (strlen(name) == 0) {
405                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
406                         return WERR_OK;
407                 }
408
409                 str = talloc_strdup(mem_ctx, name);
410                 W_ERROR_HAVE_NO_MEMORY(str);
411
412                 if (format_offered == DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX) {
413                         /* Look backwards for the \n, and replace it with / */
414                         s = strrchr(str, '\n');
415                         if (!s) {
416                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
417                                 return WERR_OK;
418                         }
419                         s[0] = '/';
420                 }
421
422                 s = strchr(str, '/');
423                 if (!s) {
424                         /* there must be at least one / */
425                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
426                         return WERR_OK;
427                 }
428
429                 s[0] = '\0';
430                 s++;
431
432                 domain_filter = talloc_asprintf(mem_ctx, "(&(objectClass=crossRef)(ncName=%s))", 
433                                                 ldb_dn_get_linearized(samdb_dns_domain_to_dn(sam_ctx, mem_ctx, str)));
434                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
435
436                 /* There may not be anything after the domain component (search for the domain itself) */
437                 if (s[0]) {
438
439                         account = strrchr(s, '/');
440                         if (!account) {
441                                 account = s;
442                         } else {
443                                 account++;
444                         }
445                         account = ldb_binary_encode_string(mem_ctx, account);
446                         W_ERROR_HAVE_NO_MEMORY(account);
447                         result_filter = talloc_asprintf(mem_ctx, "(name=%s)",
448                                                         account);              
449                         W_ERROR_HAVE_NO_MEMORY(result_filter);
450                 }
451                 break;
452         }
453         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
454                 char *p;
455                 char *domain;
456                 const char *account = NULL;
457
458                 domain = talloc_strdup(mem_ctx, name);
459                 W_ERROR_HAVE_NO_MEMORY(domain);
460
461                 p = strchr(domain, '\\');
462                 if (!p) {
463                         /* invalid input format */
464                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
465                         return WERR_OK;
466                 }
467                 p[0] = '\0';
468
469                 if (p[1]) {
470                         account = &p[1];
471                 }
472
473                 domain_filter = talloc_asprintf(mem_ctx, 
474                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))", 
475                                                 ldb_binary_encode_string(mem_ctx, domain));
476                 W_ERROR_HAVE_NO_MEMORY(domain_filter);
477                 if (account) {
478                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
479                                                         ldb_binary_encode_string(mem_ctx, account));
480                         W_ERROR_HAVE_NO_MEMORY(result_filter);
481                 }
482
483                 talloc_free(domain);
484                 break;
485         }
486
487                 /* A LDAP DN as a string */
488         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
489                 domain_filter = NULL;
490                 name_dn = ldb_dn_new(mem_ctx, sam_ctx, name);
491                 if (! ldb_dn_validate(name_dn)) {
492                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
493                         return WERR_OK;
494                 }
495                 break;
496         }
497
498                 /* A GUID as a string */
499         case DRSUAPI_DS_NAME_FORMAT_GUID: {
500                 struct GUID guid;
501                 char *ldap_guid;
502                 NTSTATUS nt_status;
503                 domain_filter = NULL;
504
505                 nt_status = GUID_from_string(name, &guid);
506                 if (!NT_STATUS_IS_OK(nt_status)) {
507                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
508                         return WERR_OK;
509                 }
510
511                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
512                 if (!ldap_guid) {
513                         return WERR_NOMEM;
514                 }
515                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
516                                                 ldap_guid);
517                 W_ERROR_HAVE_NO_MEMORY(result_filter);
518                 break;
519         }
520         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
521                 domain_filter = NULL;
522
523                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
524                                                 ldb_binary_encode_string(mem_ctx, name), 
525                                                 ldb_binary_encode_string(mem_ctx, name));
526                 W_ERROR_HAVE_NO_MEMORY(result_filter);
527                 break;
528         }
529
530                 /* A S-1234-5678 style string */
531         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
532                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
533                 char *ldap_sid;
534
535                 domain_filter = NULL;
536                 if (!sid) {
537                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
538                         return WERR_OK;
539                 }
540                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx, 
541                                                    sid);
542                 if (!ldap_sid) {
543                         return WERR_NOMEM;
544                 }
545                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
546                                                 ldap_sid);
547                 W_ERROR_HAVE_NO_MEMORY(result_filter);
548                 break;
549         }
550         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
551                 krb5_principal principal;
552                 char *unparsed_name;
553
554                 ret = smb_krb5_init_context(mem_ctx, 
555                                             ldb_get_event_context(sam_ctx),
556                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"), 
557                                             &smb_krb5_context);
558
559                 if (ret) {
560                         return WERR_NOMEM;
561                 }
562
563                 /* Ensure we reject compleate junk first */
564                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
565                 if (ret) {
566                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
567                         return WERR_OK;
568                 }
569
570                 domain_filter = NULL;
571
572                 /* By getting the unparsed name here, we ensure the escaping is correct (and trust the client less) */
573                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
574                 if (ret) {
575                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
576                         return WERR_NOMEM;
577                 }
578
579                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
580
581                 /* The ldb_binary_encode_string() here avoid LDAP filter injection attacks */
582                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))", 
583                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
584
585                 free(unparsed_name);
586                 W_ERROR_HAVE_NO_MEMORY(result_filter);
587                 break;
588         }
589         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
590                 krb5_principal principal;
591                 char *unparsed_name_short;
592                 char *service;
593
594                 ret = smb_krb5_init_context(mem_ctx, 
595                                             ldb_get_event_context(sam_ctx),
596                                             (struct loadparm_context *)ldb_get_opaque(sam_ctx, "loadparm"), 
597                                             &smb_krb5_context);
598
599                 if (ret) {
600                         return WERR_NOMEM;
601                 }
602
603                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
604                 if (ret == 0 && principal->name.name_string.len < 2) {
605                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
606                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
607                         return WERR_OK;
608                 }
609                 ret = krb5_parse_name_flags(smb_krb5_context->krb5_context, name, 
610                                             KRB5_PRINCIPAL_PARSE_NO_REALM, &principal);
611                 if (ret) {
612                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
613
614                         return dns_domain_from_principal(mem_ctx, smb_krb5_context,
615                                                          name, info1);
616                 }
617
618                 domain_filter = NULL;
619
620                 ret = krb5_unparse_name_flags(smb_krb5_context->krb5_context, principal, 
621                                               KRB5_PRINCIPAL_UNPARSE_NO_REALM, &unparsed_name_short);
622                 if (ret) {
623                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
624                         return WERR_NOMEM;
625                 }
626
627                 service = principal->name.name_string.val[0];
628                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
629                         /* the 'cn' attribute is just the leading part of the name */
630                         char *computer_name;
631                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1], 
632                                                       strcspn(principal->name.name_string.val[1], "."));
633                         if (computer_name == NULL) {
634                                 return WERR_NOMEM;
635                         }
636
637                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))", 
638                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short), 
639                                                         ldb_binary_encode_string(mem_ctx, computer_name));
640                 } else {
641                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
642                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
643                 }
644                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
645                 free(unparsed_name_short);
646                 W_ERROR_HAVE_NO_MEMORY(result_filter);
647
648                 break;
649         }
650         default: {
651                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
652                 return WERR_OK;
653         }
654
655         }
656
657         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
658                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
659                                                  name_dn, name, info1);
660         }
661
662         return DsCrackNameOneFilter(sam_ctx, mem_ctx, 
663                                     smb_krb5_context, 
664                                     format_flags, format_offered, format_desired, 
665                                     name_dn, name, 
666                                     domain_filter, result_filter, 
667                                     info1);
668 }
669
670 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
671  * (FQDN_1779) into a canoical name without actually searching the
672  * database */
673
674 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
675                                         uint32_t format_offered, uint32_t format_desired,
676                                         struct ldb_dn *name_dn, const char *name, 
677                                         struct drsuapi_DsNameInfo1 *info1)
678 {
679         char *cracked;
680         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
681                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
682                 return WERR_OK;
683         }
684
685         switch (format_desired) {
686         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: 
687                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
688                 break;
689         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
690                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
691                 break;
692         default:
693                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
694                 return WERR_OK;
695         }
696         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
697         info1->result_name      = cracked;
698         if (!cracked) {
699                 return WERR_NOMEM;
700         }
701
702         return WERR_OK; 
703 }
704
705 /* Given a filter for the domain, and one for the result, perform the
706  * ldb search. The format offered and desired flags change the
707  * behaviours, including what attributes to return.
708  *
709  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
710  */
711
712 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
713                                    struct smb_krb5_context *smb_krb5_context,
714                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
715                                    struct ldb_dn *name_dn, const char *name, 
716                                    const char *domain_filter, const char *result_filter, 
717                                    struct drsuapi_DsNameInfo1 *info1)
718 {
719         int ldb_ret;
720         struct ldb_result *domain_res = NULL;
721         const char * const *domain_attrs;
722         const char * const *result_attrs;
723         struct ldb_message **result_res = NULL;
724         struct ldb_message *result = NULL;
725         struct ldb_dn *result_basedn = NULL;
726         int i;
727         char *p;
728         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
729
730         const char * const _domain_attrs_1779[] = { "ncName", "dnsRoot", NULL};
731         const char * const _result_attrs_null[] = { NULL };
732
733         const char * const _domain_attrs_canonical[] = { "ncName", "dnsRoot", NULL};
734         const char * const _result_attrs_canonical[] = { "canonicalName", NULL };
735
736         const char * const _domain_attrs_nt4[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
737         const char * const _result_attrs_nt4[] = { "sAMAccountName", "objectSid", "objectClass", NULL};
738
739         const char * const _domain_attrs_guid[] = { "ncName", "dnsRoot", NULL};
740         const char * const _result_attrs_guid[] = { "objectGUID", NULL};
741
742         const char * const _domain_attrs_display[] = { "ncName", "dnsRoot", NULL};
743         const char * const _result_attrs_display[] = { "displayName", "samAccountName", NULL};
744
745         const char * const _domain_attrs_none[] = { "ncName", "dnsRoot" , NULL};
746         const char * const _result_attrs_none[] = { NULL};
747
748         /* here we need to set the attrs lists for domain and result lookups */
749         switch (format_desired) {
750         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
751         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
752                 domain_attrs = _domain_attrs_1779;
753                 result_attrs = _result_attrs_null;
754                 break;
755         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
756                 domain_attrs = _domain_attrs_canonical;
757                 result_attrs = _result_attrs_canonical;
758                 break;
759         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT:
760                 domain_attrs = _domain_attrs_nt4;
761                 result_attrs = _result_attrs_nt4;
762                 break;
763         case DRSUAPI_DS_NAME_FORMAT_GUID:               
764                 domain_attrs = _domain_attrs_guid;
765                 result_attrs = _result_attrs_guid;
766                 break;
767         case DRSUAPI_DS_NAME_FORMAT_DISPLAY:            
768                 domain_attrs = _domain_attrs_display;
769                 result_attrs = _result_attrs_display;
770                 break;
771         default:
772                 domain_attrs = _domain_attrs_none;
773                 result_attrs = _result_attrs_none;
774                 break;
775         }
776
777         if (domain_filter) {
778                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
779                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
780                                              partitions_basedn,
781                                              LDB_SCOPE_ONELEVEL,
782                                              domain_attrs,
783                                              "%s", domain_filter);
784
785                 if (ldb_ret != LDB_SUCCESS) {
786                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
787                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
788                         return WERR_OK;
789                 }
790
791                 switch (domain_res->count) {
792                 case 1:
793                         break;
794                 case 0:
795                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
796                         return WERR_OK;
797                 default:
798                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
799                         return WERR_OK;
800                 }
801
802                 info1->dns_domain_name  = samdb_result_string(domain_res->msgs[0], "dnsRoot", NULL);
803                 W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
804                 info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
805         } else {
806                 info1->dns_domain_name  = NULL;
807                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
808         }
809
810         if (result_filter) {
811                 int ret;
812                 struct ldb_result *res;
813                 if (domain_res) {
814                         result_basedn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
815
816                         ret = ldb_search(sam_ctx, mem_ctx, &res,
817                                                  result_basedn, LDB_SCOPE_SUBTREE, 
818                                                  result_attrs, "%s", result_filter);
819                         if (ret != LDB_SUCCESS) {
820                                 talloc_free(result_res);
821                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
822                                 return WERR_OK;
823                         }
824                         ldb_ret = res->count;
825                         result_res = res->msgs;
826                 } else {
827                         /* search with the 'phantom root' flag */
828                         struct ldb_request *req;
829
830                         res = talloc_zero(mem_ctx, struct ldb_result);
831                         W_ERROR_HAVE_NO_MEMORY(res);
832
833                         ret = ldb_build_search_req(&req, sam_ctx, mem_ctx,
834                                                    ldb_get_root_basedn(sam_ctx),
835                                                    LDB_SCOPE_SUBTREE,
836                                                    result_filter,
837                                                    result_attrs,
838                                                    NULL,
839                                                    res,
840                                                    ldb_search_default_callback,
841                                                    NULL);
842                         if (ret == LDB_SUCCESS) {
843                                 struct ldb_search_options_control *search_options;
844                                 search_options = talloc(req, struct ldb_search_options_control);
845                                 W_ERROR_HAVE_NO_MEMORY(search_options);
846                                 search_options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
847
848                                 ret = ldb_request_add_control(req, LDB_CONTROL_SEARCH_OPTIONS_OID, false, search_options);
849                         }
850                         if (ret != LDB_SUCCESS) {
851                                 talloc_free(res);
852                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
853                                 return WERR_OK;
854                         }
855
856                         ret = ldb_request(sam_ctx, req);
857
858                         if (ret == LDB_SUCCESS) {
859                                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
860                         }
861
862                         talloc_free(req);
863
864                         if (ret != LDB_SUCCESS) {
865                                 DEBUG(2, ("DsCrackNameOneFilter phantom root search failed: %s", 
866                                           ldb_errstring(sam_ctx)));
867                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
868                                 return WERR_OK;
869                         }
870                         ldb_ret = res->count;
871                         result_res = res->msgs;
872                 }
873         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
874                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
875                                           result_attrs);
876         } else if (domain_res) {
877                 name_dn = samdb_result_dn(sam_ctx, mem_ctx, domain_res->msgs[0], "ncName", NULL);
878                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
879                                           result_attrs);
880         } else {
881                 /* Can't happen */
882                 DEBUG(0, ("LOGIC ERROR: DsCrackNameOneFilter domain ref search not availible: This can't happen..."));
883                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
884                 return WERR_OK;
885         }
886
887         switch (ldb_ret) {
888         case 1:
889                 result = result_res[0];
890                 break;
891         case 0:
892                 switch (format_offered) {
893                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: 
894                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx, 
895                                                    smb_krb5_context, 
896                                                    format_flags, format_offered, format_desired,
897                                                    name, info1);
898
899                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
900                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context, 
901                                               format_flags, format_offered, format_desired,
902                                               name, info1);
903                 }
904                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
905                 return WERR_OK;
906         case -1:
907                 DEBUG(2, ("DsCrackNameOneFilter result search failed: %s", ldb_errstring(sam_ctx)));
908                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
909                 return WERR_OK;
910         default:
911                 switch (format_offered) {
912                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
913                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
914                 {
915                         const char *canonical_name = NULL; /* Not required, but we get warnings... */
916                         /* We may need to manually filter further */
917                         for (i = 0; i < ldb_ret; i++) {
918                                 switch (format_offered) {
919                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
920                                         canonical_name = ldb_dn_canonical_string(mem_ctx, result_res[i]->dn);
921                                         break;
922                                 case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
923                                         canonical_name = ldb_dn_canonical_ex_string(mem_ctx, result_res[i]->dn);
924                                         break;
925                                 }
926                                 if (strcasecmp_m(canonical_name, name) == 0) {
927                                         result = result_res[i];
928                                         break;
929                                 }
930                         }
931                         if (!result) {
932                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
933                                 return WERR_OK;
934                         }
935                 }
936                 default:
937                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
938                         return WERR_OK;
939                 }
940         }
941
942         info1->dns_domain_name = ldb_dn_canonical_string(mem_ctx, result->dn);
943         W_ERROR_HAVE_NO_MEMORY(info1->dns_domain_name);
944         p = strchr(info1->dns_domain_name, '/');
945         if (p) {
946                 p[0] = '\0';
947         }
948
949         /* here we can use result and domain_res[0] */
950         switch (format_desired) {
951         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
952                 info1->result_name      = ldb_dn_alloc_linearized(mem_ctx, result->dn);
953                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
954
955                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
956                 return WERR_OK;
957         }
958         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
959                 info1->result_name      = samdb_result_string(result, "canonicalName", NULL);
960                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
961                 return WERR_OK;
962         }
963         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
964                 /* Not in the virtual ldb attribute */
965                 return DsCrackNameOneSyntactical(mem_ctx, 
966                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779, 
967                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
968                                                  result->dn, name, info1);
969         }
970         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
971
972                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result, "objectSid");
973                 const char *_acc = "", *_dom = "";
974
975                 if (samdb_find_attribute(sam_ctx, result, "objectClass", "domain")) {
976
977                         ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
978                                                      partitions_basedn,
979                                                      LDB_SCOPE_ONELEVEL,
980                                                      domain_attrs,
981                                                      "(ncName=%s)", ldb_dn_get_linearized(result->dn));
982
983                         if (ldb_ret != LDB_SUCCESS) {
984                                 DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
985                                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
986                                 return WERR_OK;
987                         }
988
989                         switch (domain_res->count) {
990                         case 1:
991                                 break;
992                         case 0:
993                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
994                                 return WERR_OK;
995                         default:
996                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
997                                 return WERR_OK;
998                         }
999                         _dom = samdb_result_string(domain_res->msgs[0], "nETBIOSName", NULL);
1000                         W_ERROR_HAVE_NO_MEMORY(_dom);
1001                 } else {
1002                         _acc = samdb_result_string(result, "sAMAccountName", NULL);
1003                         if (!_acc) {
1004                                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1005                                 return WERR_OK;
1006                         }
1007                         if (dom_sid_in_domain(dom_sid_parse_talloc(mem_ctx, SID_BUILTIN), sid)) {
1008                                 _dom = "BUILTIN";
1009                         } else {
1010                                 const char *attrs[] = { NULL };
1011                                 struct ldb_result *domain_res2;
1012                                 struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
1013                                 if (!dom_sid) {
1014                                         return WERR_OK;
1015                                 }
1016                                 dom_sid->num_auths--;
1017                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res,
1018                                                              NULL,
1019                                                              LDB_SCOPE_BASE,
1020                                                              attrs,
1021                                                              "(&(objectSid=%s)(objectClass=domain))", 
1022                                                              ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
1023
1024                                 if (ldb_ret != LDB_SUCCESS) {
1025                                         DEBUG(2, ("DsCrackNameOneFilter domain search failed: %s", ldb_errstring(sam_ctx)));
1026                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1027                                         return WERR_OK;
1028                                 }
1029
1030                                 switch (domain_res->count) {
1031                                 case 1:
1032                                         break;
1033                                 case 0:
1034                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1035                                         return WERR_OK;
1036                                 default:
1037                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1038                                         return WERR_OK;
1039                                 }
1040
1041                                 ldb_ret = ldb_search(sam_ctx, mem_ctx, &domain_res2,
1042                                                              partitions_basedn,
1043                                                              LDB_SCOPE_ONELEVEL,
1044                                                              domain_attrs,
1045                                                              "(ncName=%s)", ldb_dn_get_linearized(domain_res->msgs[0]->dn));
1046
1047                                 if (ldb_ret != LDB_SUCCESS) {
1048                                         DEBUG(2, ("DsCrackNameOneFilter domain ref search failed: %s", ldb_errstring(sam_ctx)));
1049                                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1050                                         return WERR_OK;
1051                                 }
1052
1053                                 switch (domain_res2->count) {
1054                                 case 1:
1055                                         break;
1056                                 case 0:
1057                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1058                                         return WERR_OK;
1059                                 default:
1060                                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1061                                         return WERR_OK;
1062                                 }
1063                                 _dom = samdb_result_string(domain_res2->msgs[0], "nETBIOSName", NULL);
1064                                 W_ERROR_HAVE_NO_MEMORY(_dom);
1065                         }
1066                 }
1067
1068                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
1069                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1070
1071                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1072                 return WERR_OK;
1073         }
1074         case DRSUAPI_DS_NAME_FORMAT_GUID: {
1075                 struct GUID guid;
1076
1077                 guid = samdb_result_guid(result, "objectGUID");
1078
1079                 info1->result_name      = GUID_string2(mem_ctx, &guid);
1080                 W_ERROR_HAVE_NO_MEMORY(info1->result_name);
1081
1082                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
1083                 return WERR_OK;
1084         }
1085         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
1086                 info1->result_name      = samdb_result_string(result, "displayName", NULL);
1087                 if (!info1->result_name) {
1088                         info1->result_name      = samdb_result_string(result, "sAMAccountName", NULL);
1089                 } 
1090                 if (!info1->result_name) {
1091                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
1092                 } else {
1093                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
1094                 }
1095                 return WERR_OK;
1096         }
1097         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
1098                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
1099                 return WERR_OK;
1100         }
1101         case DRSUAPI_DS_NAME_FORMAT_DNS_DOMAIN: 
1102         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
1103                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
1104                 return WERR_OK;
1105         }
1106         default:
1107                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
1108                 return WERR_OK;
1109         }
1110 }
1111
1112 /* Given a user Principal Name (such as foo@bar.com),
1113  * return the user and domain DNs.  This is used in the KDC to then
1114  * return the Keys and evaluate policy */
1115
1116 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx, 
1117                                    TALLOC_CTX *mem_ctx, 
1118                                    const char *user_principal_name, 
1119                                    struct ldb_dn **user_dn,
1120                                    struct ldb_dn **domain_dn) 
1121 {
1122         WERROR werr;
1123         struct drsuapi_DsNameInfo1 info1;
1124         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1125                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
1126                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779, 
1127                                   user_principal_name,
1128                                   &info1);
1129         if (!W_ERROR_IS_OK(werr)) {
1130                 return werror_to_ntstatus(werr);
1131         }
1132         switch (info1.status) {
1133         case DRSUAPI_DS_NAME_STATUS_OK:
1134                 break;
1135         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1136         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1137         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1138                 return NT_STATUS_NO_SUCH_USER;
1139         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1140         default:
1141                 return NT_STATUS_UNSUCCESSFUL;
1142         }
1143
1144         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1145
1146         if (domain_dn) {
1147                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1148                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1149                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779, 
1150                                           talloc_asprintf(mem_ctx, "%s/", 
1151                                                           info1.dns_domain_name),
1152                                           &info1);
1153                 if (!W_ERROR_IS_OK(werr)) {
1154                         return werror_to_ntstatus(werr);
1155                 }
1156                 switch (info1.status) {
1157                 case DRSUAPI_DS_NAME_STATUS_OK:
1158                         break;
1159                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1160                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1161                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1162                         return NT_STATUS_NO_SUCH_USER;
1163                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1164                 default:
1165                         return NT_STATUS_UNSUCCESSFUL;
1166                 }
1167
1168                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1169         }
1170
1171         return NT_STATUS_OK;
1172 }
1173
1174 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
1175  * return the user and domain DNs.  This is used in the KDC to then
1176  * return the Keys and evaluate policy */
1177
1178 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx, 
1179                                       TALLOC_CTX *mem_ctx, 
1180                                       const char *service_principal_name, 
1181                                       struct ldb_dn **user_dn,
1182                                       struct ldb_dn **domain_dn) 
1183 {
1184         WERROR werr;
1185         struct drsuapi_DsNameInfo1 info1;
1186         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1187                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
1188                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779, 
1189                                   service_principal_name,
1190                                   &info1);
1191         if (!W_ERROR_IS_OK(werr)) {
1192                 return werror_to_ntstatus(werr);
1193         }
1194         switch (info1.status) {
1195         case DRSUAPI_DS_NAME_STATUS_OK:
1196                 break;
1197         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1198         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1199         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1200                 return NT_STATUS_NO_SUCH_USER;
1201         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1202         default:
1203                 return NT_STATUS_UNSUCCESSFUL;
1204         }
1205
1206         *user_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1207
1208         if (domain_dn) {
1209                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
1210                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
1211                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779, 
1212                                           talloc_asprintf(mem_ctx, "%s/", 
1213                                                           info1.dns_domain_name),
1214                                           &info1);
1215                 if (!W_ERROR_IS_OK(werr)) {
1216                         return werror_to_ntstatus(werr);
1217                 }
1218                 switch (info1.status) {
1219                 case DRSUAPI_DS_NAME_STATUS_OK:
1220                         break;
1221                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1222                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1223                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1224                         return NT_STATUS_NO_SUCH_USER;
1225                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1226                 default:
1227                         return NT_STATUS_UNSUCCESSFUL;
1228                 }
1229
1230                 *domain_dn = ldb_dn_new(mem_ctx, sam_ctx, info1.result_name);
1231         }
1232
1233         return NT_STATUS_OK;
1234 }
1235
1236 NTSTATUS crack_name_to_nt4_name(TALLOC_CTX *mem_ctx, 
1237                                 struct tevent_context *ev_ctx, 
1238                                 struct loadparm_context *lp_ctx,
1239                                 uint32_t format_offered,
1240                                 const char *name, 
1241                                 const char **nt4_domain, const char **nt4_account)
1242 {
1243         WERROR werr;
1244         struct drsuapi_DsNameInfo1 info1;
1245         struct ldb_context *ldb;
1246         char *p;
1247
1248         /* Handle anonymous bind */
1249         if (!name || !*name) {
1250                 *nt4_domain = "";
1251                 *nt4_account = "";
1252                 return NT_STATUS_OK;
1253         }
1254
1255         ldb = samdb_connect(mem_ctx, ev_ctx, lp_ctx, system_session(mem_ctx, lp_ctx));
1256         if (ldb == NULL) {
1257                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1258         }
1259
1260         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
1261                                   format_offered, 
1262                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
1263                                   name,
1264                                   &info1);
1265         if (!W_ERROR_IS_OK(werr)) {
1266                 return werror_to_ntstatus(werr);
1267         }
1268         switch (info1.status) {
1269         case DRSUAPI_DS_NAME_STATUS_OK:
1270                 break;
1271         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
1272         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
1273         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
1274                 return NT_STATUS_NO_SUCH_USER;
1275         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
1276         default:
1277                 return NT_STATUS_UNSUCCESSFUL;
1278         }
1279
1280         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
1281         if (*nt4_domain == NULL) {
1282                 return NT_STATUS_NO_MEMORY;
1283         }
1284
1285         p = strchr(*nt4_domain, '\\');
1286         if (!p) {
1287                 return NT_STATUS_INVALID_PARAMETER;
1288         }
1289         p[0] = '\0';
1290
1291         *nt4_account = talloc_strdup(mem_ctx, &p[1]);
1292         if (*nt4_account == NULL) {
1293                 return NT_STATUS_NO_MEMORY;
1294         }
1295
1296         return NT_STATUS_OK;
1297 }
1298
1299 NTSTATUS crack_auto_name_to_nt4_name(TALLOC_CTX *mem_ctx,
1300                                      struct tevent_context *ev_ctx, 
1301                                      struct loadparm_context *lp_ctx,
1302                                      const char *name,
1303                                      const char **nt4_domain,
1304                                      const char **nt4_account)
1305 {
1306         uint32_t format_offered = DRSUAPI_DS_NAME_FORMAT_UNKNOWN;
1307
1308         /* Handle anonymous bind */
1309         if (!name || !*name) {
1310                 *nt4_domain = "";
1311                 *nt4_account = "";
1312                 return NT_STATUS_OK;
1313         }
1314
1315         if (strchr_m(name, '=')) {
1316                 format_offered = DRSUAPI_DS_NAME_FORMAT_FQDN_1779;
1317         } else if (strchr_m(name, '@')) {
1318                 format_offered = DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL;
1319         } else if (strchr_m(name, '\\')) {
1320                 format_offered = DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT;
1321         } else if (strchr_m(name, '/')) {
1322                 format_offered = DRSUAPI_DS_NAME_FORMAT_CANONICAL;
1323         } else {
1324                 return NT_STATUS_NO_SUCH_USER;
1325         }
1326
1327         return crack_name_to_nt4_name(mem_ctx, ev_ctx, lp_ctx, format_offered, name, nt4_domain, nt4_account);
1328 }