?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s4:dsdb/password_hash: Honor password complexity settings.
[Samba/gbeck.git] / source4 / dsdb / samdb / ldb_modules / password_hash.c
blob4644628b9f27a2942427cd854c8e2d9808639d34
1 /*
2 ldb database module
3
4 Copyright (C) Simo Sorce 2004-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
6 Copyright (C) Andrew Tridgell 2004
7 Copyright (C) Stefan Metzmacher 2007-2010
8 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
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 /*
25 * Name: ldb
26 *
27 * Component: ldb password_hash module
28 *
29 * Description: correctly handle AD password changes fields
30 *
31 * Author: Andrew Bartlett
32 * Author: Stefan Metzmacher
33 */
34
35 #include "includes.h"
36 #include "ldb_module.h"
37 #include "libcli/auth/libcli_auth.h"
38 #include "system/kerberos.h"
39 #include "auth/kerberos/kerberos.h"
40 #include "dsdb/samdb/samdb.h"
41 #include "dsdb/samdb/ldb_modules/util.h"
42 #include "dsdb/samdb/ldb_modules/password_modules.h"
43 #include "librpc/gen_ndr/ndr_drsblobs.h"
44 #include "../lib/crypto/crypto.h"
45 #include "param/param.h"
46
47 /* If we have decided there is a reason to work on this request, then
48 * setup all the password hash types correctly.
49 *
50 * If we haven't the hashes yet but the password given as plain-text (attributes
51 * 'unicodePwd', 'userPassword' and 'clearTextPassword') we have to check for
52 * the constraints. Once this is done, we calculate the password hashes.
53 *
54 * Notice: unlike the real AD which only supports the UTF16 special based
55 * 'unicodePwd' and the UTF8 based 'userPassword' plaintext attribute we
56 * understand also a UTF16 based 'clearTextPassword' one.
57 * The latter is also accessible through LDAP so it can also be set by external
58 * tools and scripts. But be aware that this isn't portable on non SAMBA 4 ADs!
59 *
60 * Also when the module receives only the password hashes (possible through
61 * specifying an internal LDB control - for security reasons) some checks are
62 * performed depending on the operation mode (see below) (e.g. if the password
63 * has been in use before if the password memory policy was activated).
64 *
65 * Attention: There is a difference between "modify" and "reset" operations
66 * (see MS-ADTS 3.1.1.3.1.5). If the client sends a "add" and "remove"
67 * operation for a password attribute we thread this as a "modify"; if it sends
68 * only a "replace" one we have an (administrative) reset.
69 *
70 * Finally, if the administrator has requested that a password history
71 * be maintained, then this should also be written out.
72 *
73 */
74
75 /* TODO: [consider always MS-ADTS 3.1.1.3.1.5]
76 * - Check for right connection encryption
77 */
78
79 /* Notice: Definition of "dsdb_control_password_change_status" moved into
80 * "samdb.h" */
81
82 struct ph_context {
83 struct ldb_module *module;
84 struct ldb_request *req;
85
86 struct ldb_request *dom_req;
87 struct ldb_reply *dom_res;
88
89 struct ldb_reply *search_res;
90
91 struct dsdb_control_password_change_status *status;
92 struct dsdb_control_password_change *change;
93
94 bool pwd_reset;
95 bool change_status;
96 bool hash_values;
97 bool userPassword;
98 bool pwd_last_set_bypass;
99 };
100
101
102 struct setup_password_fields_io {
103 struct ph_context *ac;
104
105 struct smb_krb5_context *smb_krb5_context;
106
107 /* infos about the user account */
108 struct {
109 uint32_t userAccountControl;
110 NTTIME pwdLastSet;
111 const char *sAMAccountName;
112 const char *user_principal_name;
113 bool is_computer;
114 uint32_t restrictions;
115 } u;
116
117 /* new credentials and old given credentials */
118 struct setup_password_fields_given {
119 const struct ldb_val *cleartext_utf8;
120 const struct ldb_val *cleartext_utf16;
121 struct samr_Password *nt_hash;
122 struct samr_Password *lm_hash;
123 } n, og;
124
125 /* old credentials */
126 struct {
127 struct samr_Password *nt_hash;
128 struct samr_Password *lm_hash;
129 uint32_t nt_history_len;
130 struct samr_Password *nt_history;
131 uint32_t lm_history_len;
132 struct samr_Password *lm_history;
133 const struct ldb_val *supplemental;
134 struct supplementalCredentialsBlob scb;
135 } o;
136
137 /* generated credentials */
138 struct {
139 struct samr_Password *nt_hash;
140 struct samr_Password *lm_hash;
141 uint32_t nt_history_len;
142 struct samr_Password *nt_history;
143 uint32_t lm_history_len;
144 struct samr_Password *lm_history;
145 const char *salt;
146 DATA_BLOB aes_256;
147 DATA_BLOB aes_128;
148 DATA_BLOB des_md5;
149 DATA_BLOB des_crc;
150 struct ldb_val supplemental;
151 NTTIME last_set;
152 } g;
153 };
154
155 static int password_hash_bypass(struct ldb_module *module, struct ldb_request *request)
156 {
157 struct ldb_context *ldb = ldb_module_get_ctx(module);
158 const struct ldb_message *msg;
159 struct ldb_message_element *nte;
160 struct ldb_message_element *lme;
161 struct ldb_message_element *nthe;
162 struct ldb_message_element *lmhe;
163 struct ldb_message_element *sce;
164
165 switch (request->operation) {
166 case LDB_ADD:
167 msg = request->op.add.message;
168 break;
169 case LDB_MODIFY:
170 msg = request->op.mod.message;
171 break;
172 default:
173 return ldb_next_request(module, request);
174 }
175
176 /* nobody must touch password histories and 'supplementalCredentials' */
177 nte = dsdb_get_single_valued_attr(msg, "unicodePwd",
178 request->operation);
179 lme = dsdb_get_single_valued_attr(msg, "dBCSPwd",
180 request->operation);
181 nthe = dsdb_get_single_valued_attr(msg, "ntPwdHistory",
182 request->operation);
183 lmhe = dsdb_get_single_valued_attr(msg, "lmPwdHistory",
184 request->operation);
185 sce = dsdb_get_single_valued_attr(msg, "supplementalCredentials",
186 request->operation);
187
188 #define CHECK_HASH_ELEMENT(e, min, max) do {\
189 if (e && e->num_values) { \
190 unsigned int _count; \
191 if (e->num_values != 1) { \
192 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
193 "num_values != 1"); \
194 } \
195 if ((e->values[0].length % 16) != 0) { \
196 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
197 "length % 16 != 0"); \
198 } \
199 _count = e->values[0].length / 16; \
200 if (_count < min) { \
201 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
202 "count < min"); \
203 } \
204 if (_count > max) { \
205 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
206 "count > max"); \
207 } \
208 } \
209 } while (0)
210
211 CHECK_HASH_ELEMENT(nte, 1, 1);
212 CHECK_HASH_ELEMENT(lme, 1, 1);
213 CHECK_HASH_ELEMENT(nthe, 1, INT32_MAX);
214 CHECK_HASH_ELEMENT(lmhe, 1, INT32_MAX);
215
216 if (sce && sce->num_values) {
217 enum ndr_err_code ndr_err;
218 struct supplementalCredentialsBlob *scb;
219 struct supplementalCredentialsPackage *scpp = NULL;
220 struct supplementalCredentialsPackage *scpk = NULL;
221 struct supplementalCredentialsPackage *scpkn = NULL;
222 struct supplementalCredentialsPackage *scpct = NULL;
223 DATA_BLOB scpbp = data_blob_null;
224 DATA_BLOB scpbk = data_blob_null;
225 DATA_BLOB scpbkn = data_blob_null;
226 DATA_BLOB scpbct = data_blob_null;
227 DATA_BLOB blob;
228 uint32_t i;
229
230 if (sce->num_values != 1) {
231 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
232 "num_values != 1");
233 }
234
235 scb = talloc_zero(request, struct supplementalCredentialsBlob);
236 if (!scb) {
237 return ldb_module_oom(module);
238 }
239
240 ndr_err = ndr_pull_struct_blob_all(&sce->values[0], scb, scb,
241 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
242 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
243 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
244 "ndr_pull_struct_blob_all");
245 }
246
247 if (scb->sub.num_packages < 2) {
248 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
249 "num_packages < 2");
250 }
251
252 for (i=0; i < scb->sub.num_packages; i++) {
253 DATA_BLOB subblob;
254
255 subblob = strhex_to_data_blob(scb, scb->sub.packages[i].data);
256 if (subblob.data == NULL) {
257 return ldb_module_oom(module);
258 }
259
260 if (strcmp(scb->sub.packages[i].name, "Packages") == 0) {
261 if (scpp) {
262 return ldb_error(ldb,
263 LDB_ERR_CONSTRAINT_VIOLATION,
264 "Packages twice");
265 }
266 scpp = &scb->sub.packages[i];
267 scpbp = subblob;
268 continue;
269 }
270 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos") == 0) {
271 if (scpk) {
272 return ldb_error(ldb,
273 LDB_ERR_CONSTRAINT_VIOLATION,
274 "Primary:Kerberos twice");
275 }
276 scpk = &scb->sub.packages[i];
277 scpbk = subblob;
278 continue;
279 }
280 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos-Newer-Keys") == 0) {
281 if (scpkn) {
282 return ldb_error(ldb,
283 LDB_ERR_CONSTRAINT_VIOLATION,
284 "Primary:Kerberos-Newer-Keys twice");
285 }
286 scpkn = &scb->sub.packages[i];
287 scpbkn = subblob;
288 continue;
289 }
290 if (strcmp(scb->sub.packages[i].name, "Primary:CLEARTEXT") == 0) {
291 if (scpct) {
292 return ldb_error(ldb,
293 LDB_ERR_CONSTRAINT_VIOLATION,
294 "Primary:CLEARTEXT twice");
295 }
296 scpct = &scb->sub.packages[i];
297 scpbct = subblob;
298 continue;
299 }
300
301 data_blob_free(&subblob);
302 }
303
304 if (scpp == NULL) {
305 return ldb_error(ldb,
306 LDB_ERR_CONSTRAINT_VIOLATION,
307 "Primary:Packages missing");
308 }
309
310 if (scpk == NULL) {
311 /*
312 * If Primary:Kerberos is missing w2k8r2 reboots
313 * when a password is changed.
314 */
315 return ldb_error(ldb,
316 LDB_ERR_CONSTRAINT_VIOLATION,
317 "Primary:Kerberos missing");
318 }
319
320 if (scpp) {
321 struct package_PackagesBlob *p;
322 uint32_t n;
323
324 p = talloc_zero(scb, struct package_PackagesBlob);
325 if (p == NULL) {
326 return ldb_module_oom(module);
327 }
328
329 ndr_err = ndr_pull_struct_blob(&scpbp, p, p,
330 (ndr_pull_flags_fn_t)ndr_pull_package_PackagesBlob);
331 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
332 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
333 "ndr_pull_struct_blob Packages");
334 }
335
336 if (p->names == NULL) {
337 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
338 "Packages names == NULL");
339 }
340
341 for (n = 0; p->names[n]; n++) {
342 /* noop */
343 }
344
345 if (scb->sub.num_packages != (n + 1)) {
346 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
347 "Packages num_packages != num_names + 1");
348 }
349
350 talloc_free(p);
351 }
352
353 if (scpk) {
354 struct package_PrimaryKerberosBlob *k;
355
356 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
357 if (k == NULL) {
358 return ldb_module_oom(module);
359 }
360
361 ndr_err = ndr_pull_struct_blob(&scpbk, k, k,
362 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
363 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
364 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
365 "ndr_pull_struct_blob PrimaryKerberos");
366 }
367
368 if (k->version != 3) {
369 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
370 "PrimaryKerberos version != 3");
371 }
372
373 if (k->ctr.ctr3.salt.string == NULL) {
374 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
375 "PrimaryKerberos salt == NULL");
376 }
377
378 if (strlen(k->ctr.ctr3.salt.string) == 0) {
379 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
380 "PrimaryKerberos strlen(salt) == 0");
381 }
382
383 if (k->ctr.ctr3.num_keys != 2) {
384 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
385 "PrimaryKerberos num_keys != 2");
386 }
387
388 if (k->ctr.ctr3.num_old_keys > k->ctr.ctr3.num_keys) {
389 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
390 "PrimaryKerberos num_old_keys > num_keys");
391 }
392
393 if (k->ctr.ctr3.keys[0].keytype != ENCTYPE_DES_CBC_MD5) {
394 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
395 "PrimaryKerberos key[0] != DES_CBC_MD5");
396 }
397 if (k->ctr.ctr3.keys[1].keytype != ENCTYPE_DES_CBC_CRC) {
398 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
399 "PrimaryKerberos key[1] != DES_CBC_CRC");
400 }
401
402 if (k->ctr.ctr3.keys[0].value_len != 8) {
403 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
404 "PrimaryKerberos key[0] value_len != 8");
405 }
406 if (k->ctr.ctr3.keys[1].value_len != 8) {
407 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
408 "PrimaryKerberos key[1] value_len != 8");
409 }
410
411 for (i = 0; i < k->ctr.ctr3.num_old_keys; i++) {
412 if (k->ctr.ctr3.old_keys[i].keytype ==
413 k->ctr.ctr3.keys[i].keytype &&
414 k->ctr.ctr3.old_keys[i].value_len ==
415 k->ctr.ctr3.keys[i].value_len) {
416 continue;
417 }
418
419 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
420 "PrimaryKerberos old_keys type/value_len doesn't match");
421 }
422
423 talloc_free(k);
424 }
425
426 if (scpkn) {
427 struct package_PrimaryKerberosBlob *k;
428
429 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
430 if (k == NULL) {
431 return ldb_module_oom(module);
432 }
433
434 ndr_err = ndr_pull_struct_blob(&scpbkn, k, k,
435 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
436 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
437 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
438 "ndr_pull_struct_blob PrimaryKerberosNeverKeys");
439 }
440
441 if (k->version != 4) {
442 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
443 "KerberosNerverKeys version != 4");
444 }
445
446 if (k->ctr.ctr4.salt.string == NULL) {
447 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
448 "KerberosNewerKeys salt == NULL");
449 }
450
451 if (strlen(k->ctr.ctr4.salt.string) == 0) {
452 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
453 "KerberosNewerKeys strlen(salt) == 0");
454 }
455
456 if (k->ctr.ctr4.num_keys != 4) {
457 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
458 "KerberosNewerKeys num_keys != 2");
459 }
460
461 if (k->ctr.ctr4.num_old_keys > k->ctr.ctr4.num_keys) {
462 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
463 "KerberosNewerKeys num_old_keys > num_keys");
464 }
465
466 if (k->ctr.ctr4.num_older_keys > k->ctr.ctr4.num_old_keys) {
467 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
468 "KerberosNewerKeys num_older_keys > num_old_keys");
469 }
470
471 if (k->ctr.ctr4.keys[0].keytype != ENCTYPE_AES256_CTS_HMAC_SHA1_96) {
472 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
473 "KerberosNewerKeys key[0] != AES256");
474 }
475 if (k->ctr.ctr4.keys[1].keytype != ENCTYPE_AES128_CTS_HMAC_SHA1_96) {
476 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
477 "KerberosNewerKeys key[1] != AES128");
478 }
479 if (k->ctr.ctr4.keys[2].keytype != ENCTYPE_DES_CBC_MD5) {
480 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
481 "KerberosNewerKeys key[2] != DES_CBC_MD5");
482 }
483 if (k->ctr.ctr4.keys[3].keytype != ENCTYPE_DES_CBC_CRC) {
484 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
485 "KerberosNewerKeys key[3] != DES_CBC_CRC");
486 }
487
488 if (k->ctr.ctr4.keys[0].value_len != 32) {
489 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
490 "KerberosNewerKeys key[0] value_len != 32");
491 }
492 if (k->ctr.ctr4.keys[1].value_len != 16) {
493 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
494 "KerberosNewerKeys key[1] value_len != 16");
495 }
496 if (k->ctr.ctr4.keys[2].value_len != 8) {
497 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
498 "KerberosNewerKeys key[2] value_len != 8");
499 }
500 if (k->ctr.ctr4.keys[3].value_len != 8) {
501 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
502 "KerberosNewerKeys key[3] value_len != 8");
503 }
504
505 /*
506 * TODO:
507 * Maybe we can check old and older keys here.
508 * But we need to do some tests, if the old keys
509 * can be taken from the PrimaryKerberos blob
510 * (with only des keys), when the domain was upgraded
511 * from w2k3 to w2k8.
512 */
513
514 talloc_free(k);
515 }
516
517 if (scpct) {
518 struct package_PrimaryCLEARTEXTBlob *ct;
519
520 ct = talloc_zero(scb, struct package_PrimaryCLEARTEXTBlob);
521 if (ct == NULL) {
522 return ldb_module_oom(module);
523 }
524
525 ndr_err = ndr_pull_struct_blob(&scpbct, ct, ct,
526 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryCLEARTEXTBlob);
527 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
528 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
529 "ndr_pull_struct_blob PrimaryCLEARTEXT");
530 }
531
532 if ((ct->cleartext.length % 2) != 0) {
533 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
534 "PrimaryCLEARTEXT length % 2 != 0");
535 }
536
537 talloc_free(ct);
538 }
539
540 ndr_err = ndr_push_struct_blob(&blob, scb, scb,
541 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
542 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
543 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
544 "ndr_pull_struct_blob_all");
545 }
546
547 if (sce->values[0].length != blob.length) {
548 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
549 "supplementalCredentialsBlob length differ");
550 }
551
552 if (memcmp(sce->values[0].data, blob.data, blob.length) != 0) {
553 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
554 "supplementalCredentialsBlob memcmp differ");
555 }
556
557 talloc_free(scb);
558 }
559
560 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_bypass - validated\n");
561 return ldb_next_request(module, request);
562 }
563
564 /* Get the NT hash, and fill it in as an entry in the password history,
565 and specify it into io->g.nt_hash */
566
567 static int setup_nt_fields(struct setup_password_fields_io *io)
568 {
569 struct ldb_context *ldb;
570 uint32_t i;
571
572 io->g.nt_hash = io->n.nt_hash;
573 ldb = ldb_module_get_ctx(io->ac->module);
574
575 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
576 return LDB_SUCCESS;
577 }
578
579 /* We might not have an old NT password */
580 io->g.nt_history = talloc_array(io->ac,
581 struct samr_Password,
582 io->ac->status->domain_data.pwdHistoryLength);
583 if (!io->g.nt_history) {
584 return ldb_oom(ldb);
585 }
586
587 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
588 io->o.nt_history_len); i++) {
589 io->g.nt_history[i+1] = io->o.nt_history[i];
590 }
591 io->g.nt_history_len = i + 1;
592
593 if (io->g.nt_hash) {
594 io->g.nt_history[0] = *io->g.nt_hash;
595 } else {
596 /*
597 * TODO: is this correct?
598 * the simular behavior is correct for the lm history case
599 */
600 E_md4hash("", io->g.nt_history[0].hash);
601 }
602
603 return LDB_SUCCESS;
604 }
605
606 /* Get the LANMAN hash, and fill it in as an entry in the password history,
607 and specify it into io->g.lm_hash */
608
609 static int setup_lm_fields(struct setup_password_fields_io *io)
610 {
611 struct ldb_context *ldb;
612 uint32_t i;
613
614 io->g.lm_hash = io->n.lm_hash;
615 ldb = ldb_module_get_ctx(io->ac->module);
616
617 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
618 return LDB_SUCCESS;
619 }
620
621 /* We might not have an old LM password */
622 io->g.lm_history = talloc_array(io->ac,
623 struct samr_Password,
624 io->ac->status->domain_data.pwdHistoryLength);
625 if (!io->g.lm_history) {
626 return ldb_oom(ldb);
627 }
628
629 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
630 io->o.lm_history_len); i++) {
631 io->g.lm_history[i+1] = io->o.lm_history[i];
632 }
633 io->g.lm_history_len = i + 1;
634
635 if (io->g.lm_hash) {
636 io->g.lm_history[0] = *io->g.lm_hash;
637 } else {
638 E_deshash("", io->g.lm_history[0].hash);
639 }
640
641 return LDB_SUCCESS;
642 }
643
644 static int setup_kerberos_keys(struct setup_password_fields_io *io)
645 {
646 struct ldb_context *ldb;
647 krb5_error_code krb5_ret;
648 Principal *salt_principal;
649 krb5_salt salt;
650 krb5_keyblock key;
651 krb5_data cleartext_data;
652
653 ldb = ldb_module_get_ctx(io->ac->module);
654 cleartext_data.data = io->n.cleartext_utf8->data;
655 cleartext_data.length = io->n.cleartext_utf8->length;
656
657 /* Many, many thanks to lukeh@padl.com for this
658 * algorithm, described in his Nov 10 2004 mail to
659 * samba-technical@samba.org */
660
661 /*
662 * Determine a salting principal
663 */
664 if (io->u.is_computer) {
665 char *name;
666 char *saltbody;
667
668 name = strlower_talloc(io->ac, io->u.sAMAccountName);
669 if (!name) {
670 return ldb_oom(ldb);
671 }
672
673 if (name[strlen(name)-1] == '$') {
674 name[strlen(name)-1] = '\0';
675 }
676
677 saltbody = talloc_asprintf(io->ac, "%s.%s", name,
678 io->ac->status->domain_data.dns_domain);
679 if (!saltbody) {
680 return ldb_oom(ldb);
681 }
682
683 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
684 &salt_principal,
685 io->ac->status->domain_data.realm,
686 "host", saltbody, NULL);
687 } else if (io->u.user_principal_name) {
688 char *user_principal_name;
689 char *p;
690
691 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
692 if (!user_principal_name) {
693 return ldb_oom(ldb);
694 }
695
696 p = strchr(user_principal_name, '@');
697 if (p) {
698 p[0] = '\0';
699 }
700
701 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
702 &salt_principal,
703 io->ac->status->domain_data.realm,
704 user_principal_name, NULL);
705 } else {
706 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
707 &salt_principal,
708 io->ac->status->domain_data.realm,
709 io->u.sAMAccountName, NULL);
710 }
711 if (krb5_ret) {
712 ldb_asprintf_errstring(ldb,
713 "setup_kerberos_keys: "
714 "generation of a salting principal failed: %s",
715 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
716 krb5_ret, io->ac));
717 return LDB_ERR_OPERATIONS_ERROR;
718 }
719
720 /*
721 * create salt from salt_principal
722 */
723 krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
724 salt_principal, &salt);
725 krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
726 if (krb5_ret) {
727 ldb_asprintf_errstring(ldb,
728 "setup_kerberos_keys: "
729 "generation of krb5_salt failed: %s",
730 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
731 krb5_ret, io->ac));
732 return LDB_ERR_OPERATIONS_ERROR;
733 }
734 /* create a talloc copy */
735 io->g.salt = talloc_strndup(io->ac,
736 (char *)salt.saltvalue.data,
737 salt.saltvalue.length);
738 krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
739 if (!io->g.salt) {
740 return ldb_oom(ldb);
741 }
742 salt.saltvalue.data = discard_const(io->g.salt);
743 salt.saltvalue.length = strlen(io->g.salt);
744
745 /*
746 * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
747 * the salt and the cleartext password
748 */
749 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
750 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
751 cleartext_data,
752 salt,
753 &key);
754 if (krb5_ret) {
755 ldb_asprintf_errstring(ldb,
756 "setup_kerberos_keys: "
757 "generation of a aes256-cts-hmac-sha1-96 key failed: %s",
758 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
759 krb5_ret, io->ac));
760 return LDB_ERR_OPERATIONS_ERROR;
761 }
762 io->g.aes_256 = data_blob_talloc(io->ac,
763 KRB5_KEY_DATA(&key),
764 KRB5_KEY_LENGTH(&key));
765 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
766 if (!io->g.aes_256.data) {
767 return ldb_oom(ldb);
768 }
769
770 /*
771 * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of
772 * the salt and the cleartext password
773 */
774 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
775 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
776 cleartext_data,
777 salt,
778 &key);
779 if (krb5_ret) {
780 ldb_asprintf_errstring(ldb,
781 "setup_kerberos_keys: "
782 "generation of a aes128-cts-hmac-sha1-96 key failed: %s",
783 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
784 krb5_ret, io->ac));
785 return LDB_ERR_OPERATIONS_ERROR;
786 }
787 io->g.aes_128 = data_blob_talloc(io->ac,
788 KRB5_KEY_DATA(&key),
789 KRB5_KEY_LENGTH(&key));
790 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
791 if (!io->g.aes_128.data) {
792 return ldb_oom(ldb);
793 }
794
795 /*
796 * create ENCTYPE_DES_CBC_MD5 key out of
797 * the salt and the cleartext password
798 */
799 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
800 ENCTYPE_DES_CBC_MD5,
801 cleartext_data,
802 salt,
803 &key);
804 if (krb5_ret) {
805 ldb_asprintf_errstring(ldb,
806 "setup_kerberos_keys: "
807 "generation of a des-cbc-md5 key failed: %s",
808 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
809 krb5_ret, io->ac));
810 return LDB_ERR_OPERATIONS_ERROR;
811 }
812 io->g.des_md5 = data_blob_talloc(io->ac,
813 KRB5_KEY_DATA(&key),
814 KRB5_KEY_LENGTH(&key));
815 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
816 if (!io->g.des_md5.data) {
817 return ldb_oom(ldb);
818 }
819
820 /*
821 * create ENCTYPE_DES_CBC_CRC key out of
822 * the salt and the cleartext password
823 */
824 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
825 ENCTYPE_DES_CBC_CRC,
826 cleartext_data,
827 salt,
828 &key);
829 if (krb5_ret) {
830 ldb_asprintf_errstring(ldb,
831 "setup_kerberos_keys: "
832 "generation of a des-cbc-crc key failed: %s",
833 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
834 krb5_ret, io->ac));
835 return LDB_ERR_OPERATIONS_ERROR;
836 }
837 io->g.des_crc = data_blob_talloc(io->ac,
838 KRB5_KEY_DATA(&key),
839 KRB5_KEY_LENGTH(&key));
840 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
841 if (!io->g.des_crc.data) {
842 return ldb_oom(ldb);
843 }
844
845 return LDB_SUCCESS;
846 }
847
848 static int setup_primary_kerberos(struct setup_password_fields_io *io,
849 const struct supplementalCredentialsBlob *old_scb,
850 struct package_PrimaryKerberosBlob *pkb)
851 {
852 struct ldb_context *ldb;
853 struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
854 struct supplementalCredentialsPackage *old_scp = NULL;
855 struct package_PrimaryKerberosBlob _old_pkb;
856 struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
857 uint32_t i;
858 enum ndr_err_code ndr_err;
859
860 ldb = ldb_module_get_ctx(io->ac->module);
861
862 /*
863 * prepare generation of keys
864 *
865 * ENCTYPE_DES_CBC_MD5
866 * ENCTYPE_DES_CBC_CRC
867 */
868 pkb->version = 3;
869 pkb3->salt.string = io->g.salt;
870 pkb3->num_keys = 2;
871 pkb3->keys = talloc_array(io->ac,
872 struct package_PrimaryKerberosKey3,
873 pkb3->num_keys);
874 if (!pkb3->keys) {
875 return ldb_oom(ldb);
876 }
877
878 pkb3->keys[0].keytype = ENCTYPE_DES_CBC_MD5;
879 pkb3->keys[0].value = &io->g.des_md5;
880 pkb3->keys[1].keytype = ENCTYPE_DES_CBC_CRC;
881 pkb3->keys[1].value = &io->g.des_crc;
882
883 /* initialize the old keys to zero */
884 pkb3->num_old_keys = 0;
885 pkb3->old_keys = NULL;
886
887 /* if there're no old keys, then we're done */
888 if (!old_scb) {
889 return LDB_SUCCESS;
890 }
891
892 for (i=0; i < old_scb->sub.num_packages; i++) {
893 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
894 continue;
895 }
896
897 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
898 continue;
899 }
900
901 old_scp = &old_scb->sub.packages[i];
902 break;
903 }
904 /* Primary:Kerberos element of supplementalCredentials */
905 if (old_scp) {
906 DATA_BLOB blob;
907
908 blob = strhex_to_data_blob(io->ac, old_scp->data);
909 if (!blob.data) {
910 return ldb_oom(ldb);
911 }
912
913 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
914 ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
915 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
916 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
917 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
918 ldb_asprintf_errstring(ldb,
919 "setup_primary_kerberos: "
920 "failed to pull old package_PrimaryKerberosBlob: %s",
921 nt_errstr(status));
922 return LDB_ERR_OPERATIONS_ERROR;
923 }
924
925 if (_old_pkb.version != 3) {
926 ldb_asprintf_errstring(ldb,
927 "setup_primary_kerberos: "
928 "package_PrimaryKerberosBlob version[%u] expected[3]",
929 _old_pkb.version);
930 return LDB_ERR_OPERATIONS_ERROR;
931 }
932
933 old_pkb3 = &_old_pkb.ctr.ctr3;
934 }
935
936 /* if we didn't found the old keys we're done */
937 if (!old_pkb3) {
938 return LDB_SUCCESS;
939 }
940
941 /* fill in the old keys */
942 pkb3->num_old_keys = old_pkb3->num_keys;
943 pkb3->old_keys = old_pkb3->keys;
944
945 return LDB_SUCCESS;
946 }
947
948 static int setup_primary_kerberos_newer(struct setup_password_fields_io *io,
949 const struct supplementalCredentialsBlob *old_scb,
950 struct package_PrimaryKerberosBlob *pkb)
951 {
952 struct ldb_context *ldb;
953 struct package_PrimaryKerberosCtr4 *pkb4 = &pkb->ctr.ctr4;
954 struct supplementalCredentialsPackage *old_scp = NULL;
955 struct package_PrimaryKerberosBlob _old_pkb;
956 struct package_PrimaryKerberosCtr4 *old_pkb4 = NULL;
957 uint32_t i;
958 enum ndr_err_code ndr_err;
959
960 ldb = ldb_module_get_ctx(io->ac->module);
961
962 /*
963 * prepare generation of keys
964 *
965 * ENCTYPE_AES256_CTS_HMAC_SHA1_96
966 * ENCTYPE_AES128_CTS_HMAC_SHA1_96
967 * ENCTYPE_DES_CBC_MD5
968 * ENCTYPE_DES_CBC_CRC
969 */
970 pkb->version = 4;
971 pkb4->salt.string = io->g.salt;
972 pkb4->default_iteration_count = 4096;
973 pkb4->num_keys = 4;
974
975 pkb4->keys = talloc_array(io->ac,
976 struct package_PrimaryKerberosKey4,
977 pkb4->num_keys);
978 if (!pkb4->keys) {
979 return ldb_oom(ldb);
980 }
981
982 pkb4->keys[0].iteration_count = 4096;
983 pkb4->keys[0].keytype = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
984 pkb4->keys[0].value = &io->g.aes_256;
985 pkb4->keys[1].iteration_count = 4096;
986 pkb4->keys[1].keytype = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
987 pkb4->keys[1].value = &io->g.aes_128;
988 pkb4->keys[2].iteration_count = 4096;
989 pkb4->keys[2].keytype = ENCTYPE_DES_CBC_MD5;
990 pkb4->keys[2].value = &io->g.des_md5;
991 pkb4->keys[3].iteration_count = 4096;
992 pkb4->keys[3].keytype = ENCTYPE_DES_CBC_CRC;
993 pkb4->keys[3].value = &io->g.des_crc;
994
995 /* initialize the old keys to zero */
996 pkb4->num_old_keys = 0;
997 pkb4->old_keys = NULL;
998 pkb4->num_older_keys = 0;
999 pkb4->older_keys = NULL;
1000
1001 /* if there're no old keys, then we're done */
1002 if (!old_scb) {
1003 return LDB_SUCCESS;
1004 }
1005
1006 for (i=0; i < old_scb->sub.num_packages; i++) {
1007 if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) {
1008 continue;
1009 }
1010
1011 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
1012 continue;
1013 }
1014
1015 old_scp = &old_scb->sub.packages[i];
1016 break;
1017 }
1018 /* Primary:Kerberos-Newer-Keys element of supplementalCredentials */
1019 if (old_scp) {
1020 DATA_BLOB blob;
1021
1022 blob = strhex_to_data_blob(io->ac, old_scp->data);
1023 if (!blob.data) {
1024 return ldb_oom(ldb);
1025 }
1026
1027 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
1028 ndr_err = ndr_pull_struct_blob(&blob, io->ac,
1029 &_old_pkb,
1030 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
1031 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1032 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1033 ldb_asprintf_errstring(ldb,
1034 "setup_primary_kerberos_newer: "
1035 "failed to pull old package_PrimaryKerberosBlob: %s",
1036 nt_errstr(status));
1037 return LDB_ERR_OPERATIONS_ERROR;
1038 }
1039
1040 if (_old_pkb.version != 4) {
1041 ldb_asprintf_errstring(ldb,
1042 "setup_primary_kerberos_newer: "
1043 "package_PrimaryKerberosBlob version[%u] expected[4]",
1044 _old_pkb.version);
1045 return LDB_ERR_OPERATIONS_ERROR;
1046 }
1047
1048 old_pkb4 = &_old_pkb.ctr.ctr4;
1049 }
1050
1051 /* if we didn't found the old keys we're done */
1052 if (!old_pkb4) {
1053 return LDB_SUCCESS;
1054 }
1055
1056 /* fill in the old keys */
1057 pkb4->num_old_keys = old_pkb4->num_keys;
1058 pkb4->old_keys = old_pkb4->keys;
1059 pkb4->num_older_keys = old_pkb4->num_old_keys;
1060 pkb4->older_keys = old_pkb4->old_keys;
1061
1062 return LDB_SUCCESS;
1063 }
1064
1065 static int setup_primary_wdigest(struct setup_password_fields_io *io,
1066 const struct supplementalCredentialsBlob *old_scb,
1067 struct package_PrimaryWDigestBlob *pdb)
1068 {
1069 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1070 DATA_BLOB sAMAccountName;
1071 DATA_BLOB sAMAccountName_l;
1072 DATA_BLOB sAMAccountName_u;
1073 const char *user_principal_name = io->u.user_principal_name;
1074 DATA_BLOB userPrincipalName;
1075 DATA_BLOB userPrincipalName_l;
1076 DATA_BLOB userPrincipalName_u;
1077 DATA_BLOB netbios_domain;
1078 DATA_BLOB netbios_domain_l;
1079 DATA_BLOB netbios_domain_u;
1080 DATA_BLOB dns_domain;
1081 DATA_BLOB dns_domain_l;
1082 DATA_BLOB dns_domain_u;
1083 DATA_BLOB digest;
1084 DATA_BLOB delim;
1085 DATA_BLOB backslash;
1086 uint8_t i;
1087 struct {
1088 DATA_BLOB *user;
1089 DATA_BLOB *realm;
1090 DATA_BLOB *nt4dom;
1091 } wdigest[] = {
1092 /*
1093 * See
1094 * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
1095 * for what precalculated hashes are supposed to be stored...
1096 *
1097 * I can't reproduce all values which should contain "Digest" as realm,
1098 * am I doing something wrong or is w2k3 just broken...?
1099 *
1100 * W2K3 fills in following for a user:
1101 *
1102 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1103 * sAMAccountName: NewUser2Sam
1104 * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
1105 *
1106 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1107 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1108 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1109 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1110 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1111 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1112 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1113 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1114 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1115 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1116 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1117 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1118 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1119 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1120 * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1121 * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1122 * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1123 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1124 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1125 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1126 * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
1127 * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
1128 * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
1129 * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
1130 * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
1131 * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
1132 * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
1133 * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
1134 * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
1135 *
1136 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1137 * sAMAccountName: NewUser2Sam
1138 *
1139 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1140 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1141 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1142 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1143 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1144 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1145 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1146 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1147 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1148 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1149 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1150 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1151 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1152 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1153 * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1154 * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1155 * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1156 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1157 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1158 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1159 * 31dc704d3640335b2123d4ee28aa1f11 => ???M1 changes with NewUser2Sam => NewUser1Sam
1160 * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
1161 * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
1162 * 569b4533f2d9e580211dd040e5e360a8 => ???M2 changes with NewUser2Princ => NewUser1Princ
1163 * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
1164 * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
1165 * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
1166 * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
1167 * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
1168 */
1169
1170 /*
1171 * sAMAccountName, netbios_domain
1172 */
1173 {
1174 .user = &sAMAccountName,
1175 .realm = &netbios_domain,
1176 },
1177 {
1178 .user = &sAMAccountName_l,
1179 .realm = &netbios_domain_l,
1180 },
1181 {
1182 .user = &sAMAccountName_u,
1183 .realm = &netbios_domain_u,
1184 },
1185 {
1186 .user = &sAMAccountName,
1187 .realm = &netbios_domain_u,
1188 },
1189 {
1190 .user = &sAMAccountName,
1191 .realm = &netbios_domain_l,
1192 },
1193 {
1194 .user = &sAMAccountName_u,
1195 .realm = &netbios_domain_l,
1196 },
1197 {
1198 .user = &sAMAccountName_l,
1199 .realm = &netbios_domain_u,
1200 },
1201 /*
1202 * sAMAccountName, dns_domain
1203 */
1204 {
1205 .user = &sAMAccountName,
1206 .realm = &dns_domain,
1207 },
1208 {
1209 .user = &sAMAccountName_l,
1210 .realm = &dns_domain_l,
1211 },
1212 {
1213 .user = &sAMAccountName_u,
1214 .realm = &dns_domain_u,
1215 },
1216 {
1217 .user = &sAMAccountName,
1218 .realm = &dns_domain_u,
1219 },
1220 {
1221 .user = &sAMAccountName,
1222 .realm = &dns_domain_l,
1223 },
1224 {
1225 .user = &sAMAccountName_u,
1226 .realm = &dns_domain_l,
1227 },
1228 {
1229 .user = &sAMAccountName_l,
1230 .realm = &dns_domain_u,
1231 },
1232 /*
1233 * userPrincipalName, no realm
1234 */
1235 {
1236 .user = &userPrincipalName,
1237 },
1238 {
1239 /*
1240 * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
1241 * the fallback to the sAMAccountName based userPrincipalName is correct
1242 */
1243 .user = &userPrincipalName_l,
1244 },
1245 {
1246 .user = &userPrincipalName_u,
1247 },
1248 /*
1249 * nt4dom\sAMAccountName, no realm
1250 */
1251 {
1252 .user = &sAMAccountName,
1253 .nt4dom = &netbios_domain
1254 },
1255 {
1256 .user = &sAMAccountName_l,
1257 .nt4dom = &netbios_domain_l
1258 },
1259 {
1260 .user = &sAMAccountName_u,
1261 .nt4dom = &netbios_domain_u
1262 },
1263
1264 /*
1265 * the following ones are guessed depending on the technet2 article
1266 * but not reproducable on a w2k3 server
1267 */
1268 /* sAMAccountName with "Digest" realm */
1269 {
1270 .user = &sAMAccountName,
1271 .realm = &digest
1272 },
1273 {
1274 .user = &sAMAccountName_l,
1275 .realm = &digest
1276 },
1277 {
1278 .user = &sAMAccountName_u,
1279 .realm = &digest
1280 },
1281 /* userPrincipalName with "Digest" realm */
1282 {
1283 .user = &userPrincipalName,
1284 .realm = &digest
1285 },
1286 {
1287 .user = &userPrincipalName_l,
1288 .realm = &digest
1289 },
1290 {
1291 .user = &userPrincipalName_u,
1292 .realm = &digest
1293 },
1294 /* nt4dom\\sAMAccountName with "Digest" realm */
1295 {
1296 .user = &sAMAccountName,
1297 .nt4dom = &netbios_domain,
1298 .realm = &digest
1299 },
1300 {
1301 .user = &sAMAccountName_l,
1302 .nt4dom = &netbios_domain_l,
1303 .realm = &digest
1304 },
1305 {
1306 .user = &sAMAccountName_u,
1307 .nt4dom = &netbios_domain_u,
1308 .realm = &digest
1309 },
1310 };
1311
1312 /* prepare DATA_BLOB's used in the combinations array */
1313 sAMAccountName = data_blob_string_const(io->u.sAMAccountName);
1314 sAMAccountName_l = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
1315 if (!sAMAccountName_l.data) {
1316 return ldb_oom(ldb);
1317 }
1318 sAMAccountName_u = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
1319 if (!sAMAccountName_u.data) {
1320 return ldb_oom(ldb);
1321 }
1322
1323 /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
1324 if (!user_principal_name) {
1325 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
1326 io->u.sAMAccountName,
1327 io->ac->status->domain_data.dns_domain);
1328 if (!user_principal_name) {
1329 return ldb_oom(ldb);
1330 }
1331 }
1332 userPrincipalName = data_blob_string_const(user_principal_name);
1333 userPrincipalName_l = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
1334 if (!userPrincipalName_l.data) {
1335 return ldb_oom(ldb);
1336 }
1337 userPrincipalName_u = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
1338 if (!userPrincipalName_u.data) {
1339 return ldb_oom(ldb);
1340 }
1341
1342 netbios_domain = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
1343 netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac,
1344 io->ac->status->domain_data.netbios_domain));
1345 if (!netbios_domain_l.data) {
1346 return ldb_oom(ldb);
1347 }
1348 netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac,
1349 io->ac->status->domain_data.netbios_domain));
1350 if (!netbios_domain_u.data) {
1351 return ldb_oom(ldb);
1352 }
1353
1354 dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1355 dns_domain_l = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1356 dns_domain_u = data_blob_string_const(io->ac->status->domain_data.realm);
1357
1358 digest = data_blob_string_const("Digest");
1359
1360 delim = data_blob_string_const(":");
1361 backslash = data_blob_string_const("\\");
1362
1363 pdb->num_hashes = ARRAY_SIZE(wdigest);
1364 pdb->hashes = talloc_array(io->ac, struct package_PrimaryWDigestHash,
1365 pdb->num_hashes);
1366 if (!pdb->hashes) {
1367 return ldb_oom(ldb);
1368 }
1369
1370 for (i=0; i < ARRAY_SIZE(wdigest); i++) {
1371 struct MD5Context md5;
1372 MD5Init(&md5);
1373 if (wdigest[i].nt4dom) {
1374 MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
1375 MD5Update(&md5, backslash.data, backslash.length);
1376 }
1377 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
1378 MD5Update(&md5, delim.data, delim.length);
1379 if (wdigest[i].realm) {
1380 MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
1381 }
1382 MD5Update(&md5, delim.data, delim.length);
1383 MD5Update(&md5, io->n.cleartext_utf8->data, io->n.cleartext_utf8->length);
1384 MD5Final(pdb->hashes[i].hash, &md5);
1385 }
1386
1387 return LDB_SUCCESS;
1388 }
1389
1390 static int setup_supplemental_field(struct setup_password_fields_io *io)
1391 {
1392 struct ldb_context *ldb;
1393 struct supplementalCredentialsBlob scb;
1394 struct supplementalCredentialsBlob _old_scb;
1395 struct supplementalCredentialsBlob *old_scb = NULL;
1396 /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */
1397 uint32_t num_names = 0;
1398 const char *names[1+4];
1399 uint32_t num_packages = 0;
1400 struct supplementalCredentialsPackage packages[1+4];
1401 /* Packages */
1402 struct supplementalCredentialsPackage *pp = NULL;
1403 struct package_PackagesBlob pb;
1404 DATA_BLOB pb_blob;
1405 char *pb_hexstr;
1406 /* Primary:Kerberos-Newer-Keys */
1407 const char **nkn = NULL;
1408 struct supplementalCredentialsPackage *pkn = NULL;
1409 struct package_PrimaryKerberosBlob pknb;
1410 DATA_BLOB pknb_blob;
1411 char *pknb_hexstr;
1412 /* Primary:Kerberos */
1413 const char **nk = NULL;
1414 struct supplementalCredentialsPackage *pk = NULL;
1415 struct package_PrimaryKerberosBlob pkb;
1416 DATA_BLOB pkb_blob;
1417 char *pkb_hexstr;
1418 /* Primary:WDigest */
1419 const char **nd = NULL;
1420 struct supplementalCredentialsPackage *pd = NULL;
1421 struct package_PrimaryWDigestBlob pdb;
1422 DATA_BLOB pdb_blob;
1423 char *pdb_hexstr;
1424 /* Primary:CLEARTEXT */
1425 const char **nc = NULL;
1426 struct supplementalCredentialsPackage *pc = NULL;
1427 struct package_PrimaryCLEARTEXTBlob pcb;
1428 DATA_BLOB pcb_blob;
1429 char *pcb_hexstr;
1430 int ret;
1431 enum ndr_err_code ndr_err;
1432 uint8_t zero16[16];
1433 bool do_newer_keys = false;
1434 bool do_cleartext = false;
1435
1436 ZERO_STRUCT(zero16);
1437 ZERO_STRUCT(names);
1438
1439 ldb = ldb_module_get_ctx(io->ac->module);
1440
1441 if (!io->n.cleartext_utf8) {
1442 /*
1443 * when we don't have a cleartext password
1444 * we can't setup a supplementalCredential value
1445 */
1446 return LDB_SUCCESS;
1447 }
1448
1449 /* if there's an old supplementaCredentials blob then parse it */
1450 if (io->o.supplemental) {
1451 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
1452 &_old_scb,
1453 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
1454 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1455 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1456 ldb_asprintf_errstring(ldb,
1457 "setup_supplemental_field: "
1458 "failed to pull old supplementalCredentialsBlob: %s",
1459 nt_errstr(status));
1460 return LDB_ERR_OPERATIONS_ERROR;
1461 }
1462
1463 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
1464 old_scb = &_old_scb;
1465 } else {
1466 ldb_debug(ldb, LDB_DEBUG_ERROR,
1467 "setup_supplemental_field: "
1468 "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
1469 _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
1470 }
1471 }
1472 /* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
1473 do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
1474
1475 if (io->ac->status->domain_data.store_cleartext &&
1476 (io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
1477 do_cleartext = true;
1478 }
1479
1480 /*
1481 * The ordering is this
1482 *
1483 * Primary:Kerberos-Newer-Keys (optional)
1484 * Primary:Kerberos
1485 * Primary:WDigest
1486 * Primary:CLEARTEXT (optional)
1487 *
1488 * And the 'Packages' package is insert before the last
1489 * other package.
1490 */
1491 if (do_newer_keys) {
1492 /* Primary:Kerberos-Newer-Keys */
1493 nkn = &names[num_names++];
1494 pkn = &packages[num_packages++];
1495 }
1496
1497 /* Primary:Kerberos */
1498 nk = &names[num_names++];
1499 pk = &packages[num_packages++];
1500
1501 if (!do_cleartext) {
1502 /* Packages */
1503 pp = &packages[num_packages++];
1504 }
1505
1506 /* Primary:WDigest */
1507 nd = &names[num_names++];
1508 pd = &packages[num_packages++];
1509
1510 if (do_cleartext) {
1511 /* Packages */
1512 pp = &packages[num_packages++];
1513
1514 /* Primary:CLEARTEXT */
1515 nc = &names[num_names++];
1516 pc = &packages[num_packages++];
1517 }
1518
1519 if (pkn) {
1520 /*
1521 * setup 'Primary:Kerberos-Newer-Keys' element
1522 */
1523 *nkn = "Kerberos-Newer-Keys";
1524
1525 ret = setup_primary_kerberos_newer(io, old_scb, &pknb);
1526 if (ret != LDB_SUCCESS) {
1527 return ret;
1528 }
1529
1530 ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
1531 &pknb,
1532 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1533 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1534 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1535 ldb_asprintf_errstring(ldb,
1536 "setup_supplemental_field: "
1537 "failed to push package_PrimaryKerberosNeverBlob: %s",
1538 nt_errstr(status));
1539 return LDB_ERR_OPERATIONS_ERROR;
1540 }
1541 pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
1542 if (!pknb_hexstr) {
1543 return ldb_oom(ldb);
1544 }
1545 pkn->name = "Primary:Kerberos-Newer-Keys";
1546 pkn->reserved = 1;
1547 pkn->data = pknb_hexstr;
1548 }
1549
1550 /*
1551 * setup 'Primary:Kerberos' element
1552 */
1553 *nk = "Kerberos";
1554
1555 ret = setup_primary_kerberos(io, old_scb, &pkb);
1556 if (ret != LDB_SUCCESS) {
1557 return ret;
1558 }
1559
1560 ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
1561 &pkb,
1562 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1563 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1564 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1565 ldb_asprintf_errstring(ldb,
1566 "setup_supplemental_field: "
1567 "failed to push package_PrimaryKerberosBlob: %s",
1568 nt_errstr(status));
1569 return LDB_ERR_OPERATIONS_ERROR;
1570 }
1571 pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
1572 if (!pkb_hexstr) {
1573 return ldb_oom(ldb);
1574 }
1575 pk->name = "Primary:Kerberos";
1576 pk->reserved = 1;
1577 pk->data = pkb_hexstr;
1578
1579 /*
1580 * setup 'Primary:WDigest' element
1581 */
1582 *nd = "WDigest";
1583
1584 ret = setup_primary_wdigest(io, old_scb, &pdb);
1585 if (ret != LDB_SUCCESS) {
1586 return ret;
1587 }
1588
1589 ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
1590 &pdb,
1591 (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
1592 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1593 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1594 ldb_asprintf_errstring(ldb,
1595 "setup_supplemental_field: "
1596 "failed to push package_PrimaryWDigestBlob: %s",
1597 nt_errstr(status));
1598 return LDB_ERR_OPERATIONS_ERROR;
1599 }
1600 pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
1601 if (!pdb_hexstr) {
1602 return ldb_oom(ldb);
1603 }
1604 pd->name = "Primary:WDigest";
1605 pd->reserved = 1;
1606 pd->data = pdb_hexstr;
1607
1608 /*
1609 * setup 'Primary:CLEARTEXT' element
1610 */
1611 if (pc) {
1612 *nc = "CLEARTEXT";
1613
1614 pcb.cleartext = *io->n.cleartext_utf16;
1615
1616 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
1617 &pcb,
1618 (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
1619 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1620 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1621 ldb_asprintf_errstring(ldb,
1622 "setup_supplemental_field: "
1623 "failed to push package_PrimaryCLEARTEXTBlob: %s",
1624 nt_errstr(status));
1625 return LDB_ERR_OPERATIONS_ERROR;
1626 }
1627 pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
1628 if (!pcb_hexstr) {
1629 return ldb_oom(ldb);
1630 }
1631 pc->name = "Primary:CLEARTEXT";
1632 pc->reserved = 1;
1633 pc->data = pcb_hexstr;
1634 }
1635
1636 /*
1637 * setup 'Packages' element
1638 */
1639 pb.names = names;
1640 ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1641 &pb,
1642 (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1643 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1644 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1645 ldb_asprintf_errstring(ldb,
1646 "setup_supplemental_field: "
1647 "failed to push package_PackagesBlob: %s",
1648 nt_errstr(status));
1649 return LDB_ERR_OPERATIONS_ERROR;
1650 }
1651 pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
1652 if (!pb_hexstr) {
1653 return ldb_oom(ldb);
1654 }
1655 pp->name = "Packages";
1656 pp->reserved = 2;
1657 pp->data = pb_hexstr;
1658
1659 /*
1660 * setup 'supplementalCredentials' value
1661 */
1662 ZERO_STRUCT(scb);
1663 scb.sub.num_packages = num_packages;
1664 scb.sub.packages = packages;
1665
1666 ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1667 &scb,
1668 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1669 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1670 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1671 ldb_asprintf_errstring(ldb,
1672 "setup_supplemental_field: "
1673 "failed to push supplementalCredentialsBlob: %s",
1674 nt_errstr(status));
1675 return LDB_ERR_OPERATIONS_ERROR;
1676 }
1677
1678 return LDB_SUCCESS;
1679 }
1680
1681 static int setup_last_set_field(struct setup_password_fields_io *io)
1682 {
1683 const struct ldb_message *msg = NULL;
1684
1685 switch (io->ac->req->operation) {
1686 case LDB_ADD:
1687 msg = io->ac->req->op.add.message;
1688 break;
1689 case LDB_MODIFY:
1690 msg = io->ac->req->op.mod.message;
1691 break;
1692 default:
1693 return LDB_ERR_OPERATIONS_ERROR;
1694 break;
1695 }
1696
1697 if (io->ac->pwd_last_set_bypass) {
1698 struct ldb_message_element *el;
1699
1700 if (msg == NULL) {
1701 return LDB_ERR_CONSTRAINT_VIOLATION;
1702 }
1703
1704 el = ldb_msg_find_element(msg, "pwdLastSet");
1705 if (el == NULL) {
1706 return LDB_ERR_CONSTRAINT_VIOLATION;
1707 }
1708
1709 io->g.last_set = samdb_result_nttime(msg, "pwdLastSet", 0);
1710 return LDB_SUCCESS;
1711 }
1712
1713 /* set it as now */
1714 unix_to_nt_time(&io->g.last_set, time(NULL));
1715
1716 return LDB_SUCCESS;
1717 }
1718
1719 static int setup_given_passwords(struct setup_password_fields_io *io,
1720 struct setup_password_fields_given *g)
1721 {
1722 struct ldb_context *ldb;
1723 bool ok;
1724
1725 ldb = ldb_module_get_ctx(io->ac->module);
1726
1727 if (g->cleartext_utf8) {
1728 struct ldb_val *cleartext_utf16_blob;
1729
1730 cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
1731 if (!cleartext_utf16_blob) {
1732 return ldb_oom(ldb);
1733 }
1734 if (!convert_string_talloc(io->ac,
1735 CH_UTF8, CH_UTF16,
1736 g->cleartext_utf8->data,
1737 g->cleartext_utf8->length,
1738 (void *)&cleartext_utf16_blob->data,
1739 &cleartext_utf16_blob->length)) {
1740 if (g->cleartext_utf8->length != 0) {
1741 talloc_free(cleartext_utf16_blob);
1742 ldb_asprintf_errstring(ldb,
1743 "setup_password_fields: "
1744 "failed to generate UTF16 password from cleartext UTF8 one for user '%s'!",
1745 io->u.sAMAccountName);
1746 return LDB_ERR_CONSTRAINT_VIOLATION;
1747 } else {
1748 /* passwords with length "0" are valid! */
1749 cleartext_utf16_blob->data = NULL;
1750 cleartext_utf16_blob->length = 0;
1751 }
1752 }
1753 g->cleartext_utf16 = cleartext_utf16_blob;
1754 } else if (g->cleartext_utf16) {
1755 struct ldb_val *cleartext_utf8_blob;
1756
1757 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
1758 if (!cleartext_utf8_blob) {
1759 return ldb_oom(ldb);
1760 }
1761 if (!convert_string_talloc(io->ac,
1762 CH_UTF16MUNGED, CH_UTF8,
1763 g->cleartext_utf16->data,
1764 g->cleartext_utf16->length,
1765 (void *)&cleartext_utf8_blob->data,
1766 &cleartext_utf8_blob->length)) {
1767 if (g->cleartext_utf16->length != 0) {
1768 /* We must bail out here, the input wasn't even
1769 * a multiple of 2 bytes */
1770 talloc_free(cleartext_utf8_blob);
1771 ldb_asprintf_errstring(ldb,
1772 "setup_password_fields: "
1773 "failed to generate UTF8 password from cleartext UTF 16 one for user '%s' - the latter had odd length (length must be a multiple of 2)!",
1774 io->u.sAMAccountName);
1775 return LDB_ERR_CONSTRAINT_VIOLATION;
1776 } else {
1777 /* passwords with length "0" are valid! */
1778 cleartext_utf8_blob->data = NULL;
1779 cleartext_utf8_blob->length = 0;
1780 }
1781 }
1782 g->cleartext_utf8 = cleartext_utf8_blob;
1783 }
1784
1785 if (g->cleartext_utf16) {
1786 struct samr_Password *nt_hash;
1787
1788 nt_hash = talloc(io->ac, struct samr_Password);
1789 if (!nt_hash) {
1790 return ldb_oom(ldb);
1791 }
1792 g->nt_hash = nt_hash;
1793
1794 /* compute the new nt hash */
1795 mdfour(nt_hash->hash,
1796 g->cleartext_utf16->data,
1797 g->cleartext_utf16->length);
1798 }
1799
1800 if (g->cleartext_utf8) {
1801 struct samr_Password *lm_hash;
1802
1803 lm_hash = talloc(io->ac, struct samr_Password);
1804 if (!lm_hash) {
1805 return ldb_oom(ldb);
1806 }
1807
1808 /* compute the new lm hash */
1809 ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
1810 if (ok) {
1811 g->lm_hash = lm_hash;
1812 } else {
1813 talloc_free(lm_hash);
1814 }
1815 }
1816
1817 return LDB_SUCCESS;
1818 }
1819
1820 static int setup_password_fields(struct setup_password_fields_io *io)
1821 {
1822 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1823 struct loadparm_context *lp_ctx =
1824 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1825 struct loadparm_context);
1826 int ret;
1827
1828 /* transform the old password (for password changes) */
1829 ret = setup_given_passwords(io, &io->og);
1830 if (ret != LDB_SUCCESS) {
1831 return ret;
1832 }
1833
1834 /* transform the new password */
1835 ret = setup_given_passwords(io, &io->n);
1836 if (ret != LDB_SUCCESS) {
1837 return ret;
1838 }
1839
1840 if (io->n.cleartext_utf8) {
1841 ret = setup_kerberos_keys(io);
1842 if (ret != LDB_SUCCESS) {
1843 return ret;
1844 }
1845 }
1846
1847 ret = setup_nt_fields(io);
1848 if (ret != LDB_SUCCESS) {
1849 return ret;
1850 }
1851
1852 if (lpcfg_lanman_auth(lp_ctx)) {
1853 ret = setup_lm_fields(io);
1854 if (ret != LDB_SUCCESS) {
1855 return ret;
1856 }
1857 } else {
1858 io->g.lm_hash = NULL;
1859 io->g.lm_history_len = 0;
1860 }
1861
1862 ret = setup_supplemental_field(io);
1863 if (ret != LDB_SUCCESS) {
1864 return ret;
1865 }
1866
1867 ret = setup_last_set_field(io);
1868 if (ret != LDB_SUCCESS) {
1869 return ret;
1870 }
1871
1872 return LDB_SUCCESS;
1873 }
1874
1875 static int check_password_restrictions(struct setup_password_fields_io *io)
1876 {
1877 struct ldb_context *ldb;
1878 int ret;
1879 enum samr_ValidationStatus stat;
1880
1881 ldb = ldb_module_get_ctx(io->ac->module);
1882
1883 /* First check the old password is correct, for password changes */
1884 if (!io->ac->pwd_reset) {
1885 bool nt_hash_checked = false;
1886
1887 /* we need the old nt or lm hash given by the client */
1888 if (!io->og.nt_hash && !io->og.lm_hash) {
1889 ldb_asprintf_errstring(ldb,
1890 "check_password_restrictions: "
1891 "You need to provide the old password in order "
1892 "to change it!");
1893 return LDB_ERR_UNWILLING_TO_PERFORM;
1894 }
1895
1896 /* The password modify through the NT hash is encouraged and
1897 has no problems at all */
1898 if (io->og.nt_hash) {
1899 if (!io->o.nt_hash) {
1900 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1901 ldb_asprintf_errstring(ldb,
1902 "%08X: %s - check_password_restrictions: "
1903 "There's no old nt_hash, which is needed "
1904 "in order to change your password!",
1905 W_ERROR_V(WERR_INVALID_PASSWORD),
1906 ldb_strerror(ret));
1907 return ret;
1908 }
1909
1910 if (memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
1911 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1912 ldb_asprintf_errstring(ldb,
1913 "%08X: %s - check_password_restrictions: "
1914 "The old password specified doesn't match!",
1915 W_ERROR_V(WERR_INVALID_PASSWORD),
1916 ldb_strerror(ret));
1917 return ret;
1918 }
1919
1920 nt_hash_checked = true;
1921 }
1922
1923 /* But it is also possible to change a password by the LM hash
1924 * alone for compatibility reasons. This check is optional if
1925 * the NT hash was already checked - otherwise it's mandatory.
1926 * (as the SAMR operations request it). */
1927 if (io->og.lm_hash) {
1928 if (!io->o.lm_hash && !nt_hash_checked) {
1929 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1930 ldb_asprintf_errstring(ldb,
1931 "%08X: %s - check_password_restrictions: "
1932 "There's no old lm_hash, which is needed "
1933 "in order to change your password!",
1934 W_ERROR_V(WERR_INVALID_PASSWORD),
1935 ldb_strerror(ret));
1936 return ret;
1937 }
1938
1939 if (io->o.lm_hash &&
1940 memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0) {
1941 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1942 ldb_asprintf_errstring(ldb,
1943 "%08X: %s - check_password_restrictions: "
1944 "The old password specified doesn't match!",
1945 W_ERROR_V(WERR_INVALID_PASSWORD),
1946 ldb_strerror(ret));
1947 return ret;
1948 }
1949 }
1950 }
1951
1952 if (io->u.restrictions == 0) {
1953 /* FIXME: Is this right? */
1954 return LDB_SUCCESS;
1955 }
1956
1957 /*
1958 * Fundamental password checks done by the call
1959 * "samdb_check_password".
1960 * It is also in use by "dcesrv_samr_ValidatePassword".
1961 */
1962 if (io->n.cleartext_utf8 != NULL) {
1963 stat = samdb_check_password(io->n.cleartext_utf8,
1964 io->ac->status->domain_data.pwdProperties,
1965 io->ac->status->domain_data.minPwdLength);
1966 switch (stat) {
1967 case SAMR_VALIDATION_STATUS_SUCCESS:
1968 /* perfect -> proceed! */
1969 break;
1970
1971 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
1972 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1973 ldb_asprintf_errstring(ldb,
1974 "%08X: %s - check_password_restrictions: "
1975 "the password is too short. It should be equal or longer than %u characters!",
1976 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1977 ldb_strerror(ret),
1978 io->ac->status->domain_data.minPwdLength);
1979 io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
1980 return ret;
1981
1982 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
1983 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1984 ldb_asprintf_errstring(ldb,
1985 "%08X: %s - check_password_restrictions: "
1986 "the password does not meet the complexity criteria!",
1987 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1988 ldb_strerror(ret));
1989 io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
1990 return ret;
1991
1992 default:
1993 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1994 ldb_asprintf_errstring(ldb,
1995 "%08X: %s - check_password_restrictions: "
1996 "the password doesn't fit by a certain reason!",
1997 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1998 ldb_strerror(ret));
1999 return ret;
2000 }
2001 }
2002
2003 if (io->ac->pwd_reset) {
2004 return LDB_SUCCESS;
2005 }
2006
2007 if (io->n.nt_hash) {
2008 uint32_t i;
2009
2010 /* checks the NT hash password history */
2011 for (i = 0; i < io->o.nt_history_len; i++) {
2012 ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
2013 if (ret == 0) {
2014 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2015 ldb_asprintf_errstring(ldb,
2016 "%08X: %s - check_password_restrictions: "
2017 "the password was already used (in history)!",
2018 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2019 ldb_strerror(ret));
2020 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2021 return ret;
2022 }
2023 }
2024 }
2025
2026 if (io->n.lm_hash) {
2027 uint32_t i;
2028
2029 /* checks the LM hash password history */
2030 for (i = 0; i < io->o.lm_history_len; i++) {
2031 ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
2032 if (ret == 0) {
2033 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2034 ldb_asprintf_errstring(ldb,
2035 "%08X: %s - check_password_restrictions: "
2036 "the password was already used (in history)!",
2037 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2038 ldb_strerror(ret));
2039 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2040 return ret;
2041 }
2042 }
2043 }
2044
2045 /* are all password changes disallowed? */
2046 if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
2047 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2048 ldb_asprintf_errstring(ldb,
2049 "%08X: %s - check_password_restrictions: "
2050 "password changes disabled!",
2051 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2052 ldb_strerror(ret));
2053 return ret;
2054 }
2055
2056 /* can this user change the password? */
2057 if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
2058 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2059 ldb_asprintf_errstring(ldb,
2060 "%08X: %s - check_password_restrictions: "
2061 "password can't be changed on this account!",
2062 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2063 ldb_strerror(ret));
2064 return ret;
2065 }
2066
2067 /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
2068 if (io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) {
2069 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2070 ldb_asprintf_errstring(ldb,
2071 "%08X: %s - check_password_restrictions: "
2072 "password is too young to change!",
2073 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2074 ldb_strerror(ret));
2075 return ret;
2076 }
2077
2078 return LDB_SUCCESS;
2079 }
2080
2081 /*
2082 * This is intended for use by the "password_hash" module since there
2083 * password changes can be specified through one message element with the
2084 * new password (to set) and another one with the old password (to unset).
2085 *
2086 * The first which sets a password (new value) can have flags
2087 * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
2088 * for entries). The latter (old value) has always specified
2089 * LDB_FLAG_MOD_DELETE.
2090 *
2091 * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
2092 * matching message elements are malformed in respect to the set/change rules.
2093 * Otherwise it returns LDB_SUCCESS.
2094 */
2095 static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
2096 const char *name,
2097 enum ldb_request_type operation,
2098 const struct ldb_val **new_val,
2099 const struct ldb_val **old_val)
2100 {
2101 unsigned int i;
2102
2103 *new_val = NULL;
2104 *old_val = NULL;
2105
2106 if (msg == NULL) {
2107 return LDB_SUCCESS;
2108 }
2109
2110 for (i = 0; i < msg->num_elements; i++) {
2111 if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
2112 continue;
2113 }
2114
2115 if ((operation == LDB_MODIFY) &&
2116 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
2117 /* 0 values are allowed */
2118 if (msg->elements[i].num_values == 1) {
2119 *old_val = &msg->elements[i].values[0];
2120 } else if (msg->elements[i].num_values > 1) {
2121 return LDB_ERR_CONSTRAINT_VIOLATION;
2122 }
2123 } else if ((operation == LDB_MODIFY) &&
2124 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
2125 if (msg->elements[i].num_values > 0) {
2126 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2127 } else {
2128 return LDB_ERR_UNWILLING_TO_PERFORM;
2129 }
2130 } else {
2131 /* Add operations and LDB_FLAG_MOD_ADD */
2132 if (msg->elements[i].num_values > 0) {
2133 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2134 } else {
2135 return LDB_ERR_CONSTRAINT_VIOLATION;
2136 }
2137 }
2138 }
2139
2140 return LDB_SUCCESS;
2141 }
2142
2143 static int setup_io(struct ph_context *ac,
2144 const struct ldb_message *orig_msg,
2145 const struct ldb_message *searched_msg,
2146 struct setup_password_fields_io *io)
2147 {
2148 const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
2149 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2150 struct loadparm_context *lp_ctx =
2151 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2152 struct loadparm_context);
2153 int ret;
2154
2155 ZERO_STRUCTP(io);
2156
2157 /* Some operations below require kerberos contexts */
2158
2159 if (smb_krb5_init_context(ac,
2160 ldb_get_event_context(ldb),
2161 (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
2162 &io->smb_krb5_context) != 0) {
2163 return ldb_operr(ldb);
2164 }
2165
2166 io->ac = ac;
2167
2168 io->u.userAccountControl = ldb_msg_find_attr_as_uint(searched_msg,
2169 "userAccountControl", 0);
2170 io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
2171 io->u.sAMAccountName = ldb_msg_find_attr_as_string(searched_msg,
2172 "sAMAccountName", NULL);
2173 io->u.user_principal_name = ldb_msg_find_attr_as_string(searched_msg,
2174 "userPrincipalName", NULL);
2175 io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
2176
2177 if (io->u.sAMAccountName == NULL) {
2178 ldb_asprintf_errstring(ldb,
2179 "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
2180 ldb_dn_get_linearized(searched_msg->dn));
2181
2182 return LDB_ERR_CONSTRAINT_VIOLATION;
2183 }
2184
2185 /* Only non-trust accounts have restrictions (possibly this test is the
2186 * wrong way around, but we like to be restrictive if possible */
2187 io->u.restrictions = !(io->u.userAccountControl
2188 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
2189 | UF_SERVER_TRUST_ACCOUNT));
2190
2191 if (ac->userPassword) {
2192 ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
2193 ac->req->operation,
2194 &io->n.cleartext_utf8,
2195 &io->og.cleartext_utf8);
2196 if (ret != LDB_SUCCESS) {
2197 ldb_asprintf_errstring(ldb,
2198 "setup_io: "
2199 "it's only allowed to set the old password once!");
2200 return ret;
2201 }
2202 }
2203
2204 ret = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
2205 ac->req->operation,
2206 &io->n.cleartext_utf16,
2207 &io->og.cleartext_utf16);
2208 if (ret != LDB_SUCCESS) {
2209 ldb_asprintf_errstring(ldb,
2210 "setup_io: "
2211 "it's only allowed to set the old password once!");
2212 return ret;
2213 }
2214
2215 /* this rather strange looking piece of code is there to
2216 handle a ldap client setting a password remotely using the
2217 unicodePwd ldap field. The syntax is that the password is
2218 in UTF-16LE, with a " at either end. Unfortunately the
2219 unicodePwd field is also used to store the nt hashes
2220 internally in Samba, and is used in the nt hash format on
2221 the wire in DRS replication, so we have a single name for
2222 two distinct values. The code below leaves us with a small
2223 chance (less than 1 in 2^32) of a mixup, if someone manages
2224 to create a MD4 hash which starts and ends in 0x22 0x00, as
2225 that would then be treated as a UTF16 password rather than
2226 a nthash */
2227
2228 ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
2229 ac->req->operation,
2230 &quoted_utf16,
2231 &old_quoted_utf16);
2232 if (ret != LDB_SUCCESS) {
2233 ldb_asprintf_errstring(ldb,
2234 "setup_io: "
2235 "it's only allowed to set the old password once!");
2236 return ret;
2237 }
2238
2239 /* Checks and converts the actual "unicodePwd" attribute */
2240 if (!ac->hash_values &&
2241 quoted_utf16 &&
2242 quoted_utf16->length >= 4 &&
2243 quoted_utf16->data[0] == '"' &&
2244 quoted_utf16->data[1] == 0 &&
2245 quoted_utf16->data[quoted_utf16->length-2] == '"' &&
2246 quoted_utf16->data[quoted_utf16->length-1] == 0) {
2247 struct ldb_val *quoted_utf16_2;
2248
2249 if (io->n.cleartext_utf16) {
2250 /* refuse the change if someone wants to change with
2251 with both UTF16 possibilities at the same time... */
2252 ldb_asprintf_errstring(ldb,
2253 "setup_io: "
2254 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2255 return LDB_ERR_UNWILLING_TO_PERFORM;
2256 }
2257
2258 /*
2259 * adapt the quoted UTF16 string to be a real
2260 * cleartext one
2261 */
2262 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2263 if (quoted_utf16_2 == NULL) {
2264 return ldb_oom(ldb);
2265 }
2266
2267 quoted_utf16_2->data = quoted_utf16->data + 2;
2268 quoted_utf16_2->length = quoted_utf16->length-4;
2269 io->n.cleartext_utf16 = quoted_utf16_2;
2270 io->n.nt_hash = NULL;
2271
2272 } else if (quoted_utf16) {
2273 /* We have only the hash available -> so no plaintext here */
2274 if (!ac->hash_values) {
2275 /* refuse the change if someone wants to change
2276 the hash without control specified... */
2277 ldb_asprintf_errstring(ldb,
2278 "setup_io: "
2279 "it's not allowed to set the NT hash password directly'");
2280 /* this looks odd but this is what Windows does:
2281 returns "UNWILLING_TO_PERFORM" on wrong
2282 password sets and "CONSTRAINT_VIOLATION" on
2283 wrong password changes. */
2284 if (old_quoted_utf16 == NULL) {
2285 return LDB_ERR_UNWILLING_TO_PERFORM;
2286 }
2287
2288 return LDB_ERR_CONSTRAINT_VIOLATION;
2289 }
2290
2291 io->n.nt_hash = talloc(io->ac, struct samr_Password);
2292 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
2293 MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
2294 }
2295
2296 /* Checks and converts the previous "unicodePwd" attribute */
2297 if (!ac->hash_values &&
2298 old_quoted_utf16 &&
2299 old_quoted_utf16->length >= 4 &&
2300 old_quoted_utf16->data[0] == '"' &&
2301 old_quoted_utf16->data[1] == 0 &&
2302 old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
2303 old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
2304 struct ldb_val *old_quoted_utf16_2;
2305
2306 if (io->og.cleartext_utf16) {
2307 /* refuse the change if someone wants to change with
2308 both UTF16 possibilities at the same time... */
2309 ldb_asprintf_errstring(ldb,
2310 "setup_io: "
2311 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2312 return LDB_ERR_UNWILLING_TO_PERFORM;
2313 }
2314
2315 /*
2316 * adapt the quoted UTF16 string to be a real
2317 * cleartext one
2318 */
2319 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2320 if (old_quoted_utf16_2 == NULL) {
2321 return ldb_oom(ldb);
2322 }
2323
2324 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
2325 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
2326
2327 io->og.cleartext_utf16 = old_quoted_utf16_2;
2328 io->og.nt_hash = NULL;
2329 } else if (old_quoted_utf16) {
2330 /* We have only the hash available -> so no plaintext here */
2331 if (!ac->hash_values) {
2332 /* refuse the change if someone wants to change
2333 the hash without control specified... */
2334 ldb_asprintf_errstring(ldb,
2335 "setup_io: "
2336 "it's not allowed to set the NT hash password directly'");
2337 return LDB_ERR_UNWILLING_TO_PERFORM;
2338 }
2339
2340 io->og.nt_hash = talloc(io->ac, struct samr_Password);
2341 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
2342 MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
2343 }
2344
2345 /* Handles the "dBCSPwd" attribute (LM hash) */
2346 io->n.lm_hash = NULL; io->og.lm_hash = NULL;
2347 ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
2348 ac->req->operation,
2349 &lm_hash, &old_lm_hash);
2350 if (ret != LDB_SUCCESS) {
2351 ldb_asprintf_errstring(ldb,
2352 "setup_io: "
2353 "it's only allowed to set the old password once!");
2354 return ret;
2355 }
2356
2357 if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
2358 /* refuse the change if someone wants to change the hash
2359 without control specified... */
2360 ldb_asprintf_errstring(ldb,
2361 "setup_io: "
2362 "it's not allowed to set the LM hash password directly'");
2363 return LDB_ERR_UNWILLING_TO_PERFORM;
2364 }
2365
2366 if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
2367 io->n.lm_hash = talloc(io->ac, struct samr_Password);
2368 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
2369 sizeof(io->n.lm_hash->hash)));
2370 }
2371 if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
2372 io->og.lm_hash = talloc(io->ac, struct samr_Password);
2373 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
2374 sizeof(io->og.lm_hash->hash)));
2375 }
2376
2377 /*
2378 * Handles the password change control if it's specified. It has the
2379 * precedance and overrides already specified old password values of
2380 * change requests (but that shouldn't happen since the control is
2381 * fully internal and only used in conjunction with replace requests!).
2382 */
2383 if (ac->change != NULL) {
2384 io->og.nt_hash = NULL;
2385 if (ac->change->old_nt_pwd_hash != NULL) {
2386 io->og.nt_hash = talloc_memdup(io->ac,
2387 ac->change->old_nt_pwd_hash,
2388 sizeof(struct samr_Password));
2389 }
2390 io->og.lm_hash = NULL;
2391 if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
2392 io->og.lm_hash = talloc_memdup(io->ac,
2393 ac->change->old_lm_pwd_hash,
2394 sizeof(struct samr_Password));
2395 }
2396 }
2397
2398 /* refuse the change if someone wants to change the clear-
2399 text and supply his own hashes at the same time... */
2400 if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
2401 && (io->n.nt_hash || io->n.lm_hash)) {
2402 ldb_asprintf_errstring(ldb,
2403 "setup_io: "
2404 "it's only allowed to set the password in form of cleartext attributes or as hashes");
2405 return LDB_ERR_UNWILLING_TO_PERFORM;
2406 }
2407
2408 /* refuse the change if someone wants to change the password
2409 using both plaintext methods (UTF8 and UTF16) at the same time... */
2410 if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
2411 ldb_asprintf_errstring(ldb,
2412 "setup_io: "
2413 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2414 return LDB_ERR_UNWILLING_TO_PERFORM;
2415 }
2416
2417 /* refuse the change if someone tries to set/change the password by
2418 * the lanman hash alone and we've deactivated that mechanism. This
2419 * would end in an account without any password! */
2420 if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
2421 && (!io->n.nt_hash) && (!io->n.lm_hash)) {
2422 ldb_asprintf_errstring(ldb,
2423 "setup_io: "
2424 "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
2425 /* on "userPassword" and "clearTextPassword" we've to return
2426 * something different, since these are virtual attributes */
2427 if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
2428 (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
2429 return LDB_ERR_CONSTRAINT_VIOLATION;
2430 }
2431 return LDB_ERR_UNWILLING_TO_PERFORM;
2432 }
2433
2434 /* refuse the change if someone wants to compare against a plaintext
2435 or hash at the same time for a "password modify" operation... */
2436 if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
2437 && (io->og.nt_hash || io->og.lm_hash)) {
2438 ldb_asprintf_errstring(ldb,
2439 "setup_io: "
2440 "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
2441 return LDB_ERR_UNWILLING_TO_PERFORM;
2442 }
2443
2444 /* refuse the change if someone wants to compare against both
2445 * plaintexts at the same time for a "password modify" operation... */
2446 if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
2447 ldb_asprintf_errstring(ldb,
2448 "setup_io: "
2449 "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2450 return LDB_ERR_UNWILLING_TO_PERFORM;
2451 }
2452
2453 /* Decides if we have a password modify or password reset operation */
2454 if (ac->req->operation == LDB_ADD) {
2455 /* On "add" we have only "password reset" */
2456 ac->pwd_reset = true;
2457 } else if (ac->req->operation == LDB_MODIFY) {
2458 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
2459 || io->og.nt_hash || io->og.lm_hash) {
2460 /* If we have an old password specified then for sure it
2461 * is a user "password change" */
2462 ac->pwd_reset = false;
2463 } else {
2464 /* Otherwise we have also here a "password reset" */
2465 ac->pwd_reset = true;
2466 }
2467 } else {
2468 /* this shouldn't happen */
2469 return ldb_operr(ldb);
2470 }
2471
2472 return LDB_SUCCESS;
2473 }
2474
2475 static struct ph_context *ph_init_context(struct ldb_module *module,
2476 struct ldb_request *req,
2477 bool userPassword)
2478 {
2479 struct ldb_context *ldb;
2480 struct ph_context *ac;
2481
2482 ldb = ldb_module_get_ctx(module);
2483
2484 ac = talloc_zero(req, struct ph_context);
2485 if (ac == NULL) {
2486 ldb_set_errstring(ldb, "Out of Memory");
2487 return NULL;
2488 }
2489
2490 ac->module = module;
2491 ac->req = req;
2492 ac->userPassword = userPassword;
2493
2494 return ac;
2495 }
2496
2497 static void ph_apply_controls(struct ph_context *ac)
2498 {
2499 struct ldb_control *ctrl;
2500
2501 ac->change_status = false;
2502 ctrl = ldb_request_get_control(ac->req,
2503 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
2504 if (ctrl != NULL) {
2505 ac->change_status = true;
2506
2507 /* Mark the "change status" control as uncritical (done) */
2508 ctrl->critical = false;
2509 }
2510
2511 ac->hash_values = false;
2512 ctrl = ldb_request_get_control(ac->req,
2513 DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
2514 if (ctrl != NULL) {
2515 ac->hash_values = true;
2516
2517 /* Mark the "hash values" control as uncritical (done) */
2518 ctrl->critical = false;
2519 }
2520
2521 ctrl = ldb_request_get_control(ac->req,
2522 DSDB_CONTROL_PASSWORD_CHANGE_OID);
2523 if (ctrl != NULL) {
2524 ac->change = (struct dsdb_control_password_change *) ctrl->data;
2525
2526 /* Mark the "change" control as uncritical (done) */
2527 ctrl->critical = false;
2528 }
2529
2530 ac->pwd_last_set_bypass = false;
2531 ctrl = ldb_request_get_control(ac->req,
2532 DSDB_CONTROL_PASSWORD_BYPASS_LAST_SET_OID);
2533 if (ctrl != NULL) {
2534 ac->pwd_last_set_bypass = true;
2535
2536 /* Mark the "bypass pwdLastSet" control as uncritical (done) */
2537 ctrl->critical = false;
2538 }
2539 }
2540
2541 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
2542 {
2543 struct ph_context *ac;
2544
2545 ac = talloc_get_type(req->context, struct ph_context);
2546
2547 if (!ares) {
2548 return ldb_module_done(ac->req, NULL, NULL,
2549 LDB_ERR_OPERATIONS_ERROR);
2550 }
2551
2552 if (ares->type == LDB_REPLY_REFERRAL) {
2553 return ldb_module_send_referral(ac->req, ares->referral);
2554 }
2555
2556 if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2557 /* On success and trivial errors a status control is being
2558 * added (used for example by the "samdb_set_password" call) */
2559 ldb_reply_add_control(ares,
2560 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2561 false,
2562 ac->status);
2563 }
2564
2565 if (ares->error != LDB_SUCCESS) {
2566 return ldb_module_done(ac->req, ares->controls,
2567 ares->response, ares->error);
2568 }
2569
2570 if (ares->type != LDB_REPLY_DONE) {
2571 talloc_free(ares);
2572 return ldb_module_done(ac->req, NULL, NULL,
2573 LDB_ERR_OPERATIONS_ERROR);
2574 }
2575
2576 return ldb_module_done(ac->req, ares->controls,
2577 ares->response, ares->error);
2578 }
2579
2580 static int password_hash_add_do_add(struct ph_context *ac);
2581 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2582 static int password_hash_mod_search_self(struct ph_context *ac);
2583 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2584 static int password_hash_mod_do_mod(struct ph_context *ac);
2585
2586 static int get_domain_data_callback(struct ldb_request *req,
2587 struct ldb_reply *ares)
2588 {
2589 struct ldb_context *ldb;
2590 struct ph_context *ac;
2591 struct loadparm_context *lp_ctx;
2592 int ret;
2593
2594 ac = talloc_get_type(req->context, struct ph_context);
2595 ldb = ldb_module_get_ctx(ac->module);
2596
2597 if (!ares) {
2598 ret = LDB_ERR_OPERATIONS_ERROR;
2599 goto done;
2600 }
2601 if (ares->error != LDB_SUCCESS) {
2602 return ldb_module_done(ac->req, ares->controls,
2603 ares->response, ares->error);
2604 }
2605
2606 switch (ares->type) {
2607 case LDB_REPLY_ENTRY:
2608 if (ac->status != NULL) {
2609 talloc_free(ares);
2610
2611 ldb_set_errstring(ldb, "Too many results");
2612 ret = LDB_ERR_OPERATIONS_ERROR;
2613 goto done;
2614 }
2615
2616 /* Setup the "status" structure (used as control later) */
2617 ac->status = talloc_zero(ac->req,
2618 struct dsdb_control_password_change_status);
2619 if (ac->status == NULL) {
2620 talloc_free(ares);
2621
2622 ldb_oom(ldb);
2623 ret = LDB_ERR_OPERATIONS_ERROR;
2624 goto done;
2625 }
2626
2627 /* Setup the "domain data" structure */
2628 ac->status->domain_data.pwdProperties =
2629 ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
2630 ac->status->domain_data.pwdHistoryLength =
2631 ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
2632 ac->status->domain_data.maxPwdAge =
2633 ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
2634 ac->status->domain_data.minPwdAge =
2635 ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
2636 ac->status->domain_data.minPwdLength =
2637 ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
2638 ac->status->domain_data.store_cleartext =
2639 ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2640
2641 talloc_free(ares);
2642
2643 /* For a domain DN, this puts things in dotted notation */
2644 /* For builtin domains, this will give details for the host,
2645 * but that doesn't really matter, as it's just used for salt
2646 * and kerberos principals, which don't exist here */
2647
2648 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2649 struct loadparm_context);
2650
2651 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2652 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2653 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2654
2655 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2656
2657 ret = LDB_SUCCESS;
2658 break;
2659
2660 case LDB_REPLY_REFERRAL:
2661 /* ignore */
2662 talloc_free(ares);
2663 ret = LDB_SUCCESS;
2664 break;
2665
2666 case LDB_REPLY_DONE:
2667 talloc_free(ares);
2668 /* call the next step */
2669 switch (ac->req->operation) {
2670 case LDB_ADD:
2671 ret = password_hash_add_do_add(ac);
2672 break;
2673
2674 case LDB_MODIFY:
2675 ret = password_hash_mod_do_mod(ac);
2676 break;
2677
2678 default:
2679 ret = LDB_ERR_OPERATIONS_ERROR;
2680 break;
2681 }
2682 break;
2683 }
2684
2685 done:
2686 if (ret != LDB_SUCCESS) {
2687 struct ldb_reply *new_ares;
2688
2689 new_ares = talloc_zero(ac->req, struct ldb_reply);
2690 if (new_ares == NULL) {
2691 ldb_oom(ldb);
2692 return ldb_module_done(ac->req, NULL, NULL,
2693 LDB_ERR_OPERATIONS_ERROR);
2694 }
2695
2696 new_ares->error = ret;
2697 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2698 /* On success and trivial errors a status control is being
2699 * added (used for example by the "samdb_set_password" call) */
2700 ldb_reply_add_control(new_ares,
2701 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2702 false,
2703 ac->status);
2704 }
2705
2706 return ldb_module_done(ac->req, new_ares->controls,
2707 new_ares->response, new_ares->error);
2708 }
2709
2710 return LDB_SUCCESS;
2711 }
2712
2713 static int build_domain_data_request(struct ph_context *ac)
2714 {
2715 /* attrs[] is returned from this function in
2716 ac->dom_req->op.search.attrs, so it must be static, as
2717 otherwise the compiler can put it on the stack */
2718 struct ldb_context *ldb;
2719 static const char * const attrs[] = { "pwdProperties",
2720 "pwdHistoryLength",
2721 "maxPwdAge",
2722 "minPwdAge",
2723 "minPwdLength",
2724 NULL };
2725 int ret;
2726
2727 ldb = ldb_module_get_ctx(ac->module);
2728
2729 ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
2730 ldb_get_default_basedn(ldb),
2731 LDB_SCOPE_BASE,
2732 NULL, attrs,
2733 NULL,
2734 ac, get_domain_data_callback,
2735 ac->req);
2736 LDB_REQ_SET_LOCATION(ac->dom_req);
2737 return ret;
2738 }
2739
2740 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2741 {
2742 struct ldb_context *ldb;
2743 struct ph_context *ac;
2744 struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2745 *ntAttr, *lmAttr;
2746 int ret;
2747 struct ldb_control *bypass = NULL;
2748 bool userPassword = dsdb_user_password_support(module, req, req);
2749
2750 ldb = ldb_module_get_ctx(module);
2751
2752 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2753
2754 if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2755 return ldb_next_request(module, req);
2756 }
2757
2758 bypass = ldb_request_get_control(req,
2759 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2760 if (bypass != NULL) {
2761 /* Mark the "bypass" control as uncritical (done) */
2762 bypass->critical = false;
2763 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2764 return password_hash_bypass(module, req);
2765 }
2766
2767 /* nobody must touch password histories and 'supplementalCredentials' */
2768 if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2769 return LDB_ERR_UNWILLING_TO_PERFORM;
2770 }
2771 if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2772 return LDB_ERR_UNWILLING_TO_PERFORM;
2773 }
2774 if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2775 return LDB_ERR_UNWILLING_TO_PERFORM;
2776 }
2777
2778 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2779 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2780
2781 userPasswordAttr = NULL;
2782 if (userPassword) {
2783 userPasswordAttr = ldb_msg_find_element(req->op.add.message,
2784 "userPassword");
2785 /* MS-ADTS 3.1.1.3.1.5.2 */
2786 if ((userPasswordAttr != NULL) &&
2787 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2788 return LDB_ERR_CONSTRAINT_VIOLATION;
2789 }
2790 }
2791 clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2792 ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2793 lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2794
2795 if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2796 return ldb_next_request(module, req);
2797 }
2798
2799 /* Make sure we are performing the password set action on a (for us)
2800 * valid object. Those are instances of either "user" and/or
2801 * "inetOrgPerson". Otherwise continue with the submodules. */
2802 if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2803 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2804
2805 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2806 ldb_set_errstring(ldb,
2807 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2808 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2809 }
2810
2811 return ldb_next_request(module, req);
2812 }
2813
2814 ac = ph_init_context(module, req, userPassword);
2815 if (ac == NULL) {
2816 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2817 return ldb_operr(ldb);
2818 }
2819 ph_apply_controls(ac);
2820
2821 /* get user domain data */
2822 ret = build_domain_data_request(ac);
2823 if (ret != LDB_SUCCESS) {
2824 return ret;
2825 }
2826
2827 return ldb_next_request(module, ac->dom_req);
2828 }
2829
2830 static int password_hash_add_do_add(struct ph_context *ac)
2831 {
2832 struct ldb_context *ldb;
2833 struct ldb_request *down_req;
2834 struct ldb_message *msg;
2835 struct setup_password_fields_io io;
2836 int ret;
2837
2838 /* Prepare the internal data structure containing the passwords */
2839 ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2840 if (ret != LDB_SUCCESS) {
2841 return ret;
2842 }
2843
2844 ldb = ldb_module_get_ctx(ac->module);
2845
2846 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2847 if (msg == NULL) {
2848 return ldb_operr(ldb);
2849 }
2850
2851 /* remove attributes that we just read into 'io' */
2852 if (ac->userPassword) {
2853 ldb_msg_remove_attr(msg, "userPassword");
2854 }
2855 ldb_msg_remove_attr(msg, "clearTextPassword");
2856 ldb_msg_remove_attr(msg, "unicodePwd");
2857 ldb_msg_remove_attr(msg, "dBCSPwd");
2858 ldb_msg_remove_attr(msg, "pwdLastSet");
2859
2860 ret = setup_password_fields(&io);
2861 if (ret != LDB_SUCCESS) {
2862 return ret;
2863 }
2864
2865 ret = check_password_restrictions(&io);
2866 if (ret != LDB_SUCCESS) {
2867 return ret;
2868 }
2869
2870 if (io.g.nt_hash) {
2871 ret = samdb_msg_add_hash(ldb, ac, msg,
2872 "unicodePwd", io.g.nt_hash);
2873 if (ret != LDB_SUCCESS) {
2874 return ret;
2875 }
2876 }
2877 if (io.g.lm_hash) {
2878 ret = samdb_msg_add_hash(ldb, ac, msg,
2879 "dBCSPwd", io.g.lm_hash);
2880 if (ret != LDB_SUCCESS) {
2881 return ret;
2882 }
2883 }
2884 if (io.g.nt_history_len > 0) {
2885 ret = samdb_msg_add_hashes(ldb, ac, msg,
2886 "ntPwdHistory",
2887 io.g.nt_history,
2888 io.g.nt_history_len);
2889 if (ret != LDB_SUCCESS) {
2890 return ret;
2891 }
2892 }
2893 if (io.g.lm_history_len > 0) {
2894 ret = samdb_msg_add_hashes(ldb, ac, msg,
2895 "lmPwdHistory",
2896 io.g.lm_history,
2897 io.g.lm_history_len);
2898 if (ret != LDB_SUCCESS) {
2899 return ret;
2900 }
2901 }
2902 if (io.g.supplemental.length > 0) {
2903 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2904 &io.g.supplemental, NULL);
2905 if (ret != LDB_SUCCESS) {
2906 return ret;
2907 }
2908 }
2909 ret = samdb_msg_add_uint64(ldb, ac, msg,
2910 "pwdLastSet",
2911 io.g.last_set);
2912 if (ret != LDB_SUCCESS) {
2913 return ret;
2914 }
2915
2916 ret = ldb_build_add_req(&down_req, ldb, ac,
2917 msg,
2918 ac->req->controls,
2919 ac, ph_op_callback,
2920 ac->req);
2921 LDB_REQ_SET_LOCATION(down_req);
2922 if (ret != LDB_SUCCESS) {
2923 return ret;
2924 }
2925
2926 return ldb_next_request(ac->module, down_req);
2927 }
2928
2929 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
2930 {
2931 struct ldb_context *ldb;
2932 struct ph_context *ac;
2933 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
2934 "unicodePwd", "dBCSPwd", NULL }, **l;
2935 unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
2936 struct ldb_message_element *passwordAttr;
2937 struct ldb_message *msg;
2938 struct ldb_request *down_req;
2939 int ret;
2940 struct ldb_control *bypass = NULL;
2941 bool userPassword = dsdb_user_password_support(module, req, req);
2942
2943 ldb = ldb_module_get_ctx(module);
2944
2945 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
2946
2947 if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
2948 return ldb_next_request(module, req);
2949 }
2950
2951 bypass = ldb_request_get_control(req,
2952 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2953 if (bypass != NULL) {
2954 /* Mark the "bypass" control as uncritical (done) */
2955 bypass->critical = false;
2956 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
2957 return password_hash_bypass(module, req);
2958 }
2959
2960 /* nobody must touch password histories and 'supplementalCredentials' */
2961 if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
2962 return LDB_ERR_UNWILLING_TO_PERFORM;
2963 }
2964 if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
2965 return LDB_ERR_UNWILLING_TO_PERFORM;
2966 }
2967 if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
2968 return LDB_ERR_UNWILLING_TO_PERFORM;
2969 }
2970
2971 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2972 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
2973 * For password changes/set there should be a 'delete' or a 'modify'
2974 * on these attributes. */
2975 attr_cnt = 0;
2976 for (l = passwordAttrs; *l != NULL; l++) {
2977 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
2978 continue;
2979 }
2980
2981 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
2982 /* MS-ADTS 3.1.1.3.1.5.2 */
2983 if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
2984 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2985 return LDB_ERR_CONSTRAINT_VIOLATION;
2986 }
2987
2988 ++attr_cnt;
2989 }
2990 }
2991 if (attr_cnt == 0) {
2992 return ldb_next_request(module, req);
2993 }
2994
2995 ac = ph_init_context(module, req, userPassword);
2996 if (!ac) {
2997 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2998 return ldb_operr(ldb);
2999 }
3000 ph_apply_controls(ac);
3001
3002 /* use a new message structure so that we can modify it */
3003 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
3004 if (msg == NULL) {
3005 return ldb_oom(ldb);
3006 }
3007
3008 /* - check for single-valued password attributes
3009 * (if not return "CONSTRAINT_VIOLATION")
3010 * - check that for a password change operation one add and one delete
3011 * operation exists
3012 * (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
3013 * - check that a password change and a password set operation cannot
3014 * be mixed
3015 * (if not return "UNWILLING_TO_PERFORM")
3016 * - remove all password attributes modifications from the first change
3017 * operation (anything without the passwords) - we will make the real
3018 * modification later */
3019 del_attr_cnt = 0;
3020 add_attr_cnt = 0;
3021 rep_attr_cnt = 0;
3022 for (l = passwordAttrs; *l != NULL; l++) {
3023 if ((!ac->userPassword) &&
3024 (ldb_attr_cmp(*l, "userPassword") == 0)) {
3025 continue;
3026 }
3027
3028 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
3029 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
3030 ++del_attr_cnt;
3031 }
3032 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
3033 ++add_attr_cnt;
3034 }
3035 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
3036 ++rep_attr_cnt;
3037 }
3038 if ((passwordAttr->num_values != 1) &&
3039 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
3040 talloc_free(ac);
3041 ldb_asprintf_errstring(ldb,
3042 "'%s' attribute must have exactly one value on add operations!",
3043 *l);
3044 return LDB_ERR_CONSTRAINT_VIOLATION;
3045 }
3046 if ((passwordAttr->num_values > 1) &&
3047 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
3048 talloc_free(ac);
3049 ldb_asprintf_errstring(ldb,
3050 "'%s' attribute must have zero or one value(s) on delete operations!",
3051 *l);
3052 return LDB_ERR_CONSTRAINT_VIOLATION;
3053 }
3054 ldb_msg_remove_element(msg, passwordAttr);
3055 }
3056 }
3057 if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
3058 talloc_free(ac);
3059 ldb_set_errstring(ldb,
3060 "Only the add action for a password change specified!");
3061 return LDB_ERR_UNWILLING_TO_PERFORM;
3062 }
3063 if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
3064 talloc_free(ac);
3065 ldb_set_errstring(ldb,
3066 "Only one delete and one add action for a password change allowed!");
3067 return LDB_ERR_UNWILLING_TO_PERFORM;
3068 }
3069 if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
3070 talloc_free(ac);
3071 ldb_set_errstring(ldb,
3072 "Either a password change or a password set operation is allowed!");
3073 return LDB_ERR_UNWILLING_TO_PERFORM;
3074 }
3075
3076 /* if there was nothing else to be modified skip to next step */
3077 if (msg->num_elements == 0) {
3078 return password_hash_mod_search_self(ac);
3079 }
3080
3081 ret = ldb_build_mod_req(&down_req, ldb, ac,
3082 msg,
3083 req->controls,
3084 ac, ph_modify_callback,
3085 req);
3086 LDB_REQ_SET_LOCATION(down_req);
3087 if (ret != LDB_SUCCESS) {
3088 return ret;
3089 }
3090
3091 return ldb_next_request(module, down_req);
3092 }
3093
3094 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3095 {
3096 struct ph_context *ac;
3097
3098 ac = talloc_get_type(req->context, struct ph_context);
3099
3100 if (!ares) {
3101 return ldb_module_done(ac->req, NULL, NULL,
3102 LDB_ERR_OPERATIONS_ERROR);
3103 }
3104
3105 if (ares->type == LDB_REPLY_REFERRAL) {
3106 return ldb_module_send_referral(ac->req, ares->referral);
3107 }
3108
3109 if (ares->error != LDB_SUCCESS) {
3110 return ldb_module_done(ac->req, ares->controls,
3111 ares->response, ares->error);
3112 }
3113
3114 if (ares->type != LDB_REPLY_DONE) {
3115 talloc_free(ares);
3116 return ldb_module_done(ac->req, NULL, NULL,
3117 LDB_ERR_OPERATIONS_ERROR);
3118 }
3119
3120 talloc_free(ares);
3121
3122 return password_hash_mod_search_self(ac);
3123 }
3124
3125 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
3126 {
3127 struct ldb_context *ldb;
3128 struct ph_context *ac;
3129 int ret;
3130
3131 ac = talloc_get_type(req->context, struct ph_context);
3132 ldb = ldb_module_get_ctx(ac->module);
3133
3134 if (!ares) {
3135 ret = LDB_ERR_OPERATIONS_ERROR;
3136 goto done;
3137 }
3138 if (ares->error != LDB_SUCCESS) {
3139 return ldb_module_done(ac->req, ares->controls,
3140 ares->response, ares->error);
3141 }
3142
3143 /* we are interested only in the single reply (base search) */
3144 switch (ares->type) {
3145 case LDB_REPLY_ENTRY:
3146 /* Make sure we are performing the password change action on a
3147 * (for us) valid object. Those are instances of either "user"
3148 * and/or "inetOrgPerson". Otherwise continue with the
3149 * submodules. */
3150 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
3151 && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
3152 talloc_free(ares);
3153
3154 if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
3155 ldb_set_errstring(ldb,
3156 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
3157 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
3158 goto done;
3159 }
3160
3161 ret = ldb_next_request(ac->module, ac->req);
3162 goto done;
3163 }
3164
3165 if (ac->search_res != NULL) {
3166 talloc_free(ares);
3167
3168 ldb_set_errstring(ldb, "Too many results");
3169 ret = LDB_ERR_OPERATIONS_ERROR;
3170 goto done;
3171 }
3172
3173 ac->search_res = talloc_steal(ac, ares);
3174 ret = LDB_SUCCESS;
3175 break;
3176
3177 case LDB_REPLY_REFERRAL:
3178 /* ignore anything else for now */
3179 talloc_free(ares);
3180 ret = LDB_SUCCESS;
3181 break;
3182
3183 case LDB_REPLY_DONE:
3184 talloc_free(ares);
3185
3186 /* get user domain data */
3187 ret = build_domain_data_request(ac);
3188 if (ret != LDB_SUCCESS) {
3189 return ldb_module_done(ac->req, NULL, NULL, ret);
3190 }
3191
3192 ret = ldb_next_request(ac->module, ac->dom_req);
3193 break;
3194 }
3195
3196 done:
3197 if (ret != LDB_SUCCESS) {
3198 return ldb_module_done(ac->req, NULL, NULL, ret);
3199 }
3200
3201 return LDB_SUCCESS;
3202 }
3203
3204 static int password_hash_mod_search_self(struct ph_context *ac)
3205 {
3206 struct ldb_context *ldb;
3207 static const char * const attrs[] = { "objectClass",
3208 "userAccountControl",
3209 "pwdLastSet",
3210 "sAMAccountName",
3211 "objectSid",
3212 "userPrincipalName",
3213 "supplementalCredentials",
3214 "lmPwdHistory",
3215 "ntPwdHistory",
3216 "dBCSPwd",
3217 "unicodePwd",
3218 NULL };
3219 struct ldb_request *search_req;
3220 int ret;
3221
3222 ldb = ldb_module_get_ctx(ac->module);
3223
3224 ret = ldb_build_search_req(&search_req, ldb, ac,
3225 ac->req->op.mod.message->dn,
3226 LDB_SCOPE_BASE,
3227 "(objectclass=*)",
3228 attrs,
3229 NULL,
3230 ac, ph_mod_search_callback,
3231 ac->req);
3232 LDB_REQ_SET_LOCATION(search_req);
3233 if (ret != LDB_SUCCESS) {
3234 return ret;
3235 }
3236
3237 return ldb_next_request(ac->module, search_req);
3238 }
3239
3240 static int password_hash_mod_do_mod(struct ph_context *ac)
3241 {
3242 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3243 struct loadparm_context *lp_ctx =
3244 talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
3245 struct loadparm_context);
3246 struct ldb_request *mod_req;
3247 struct ldb_message *msg;
3248 const struct ldb_message *orig_msg, *searched_msg;
3249 struct setup_password_fields_io io;
3250 int ret;
3251 NTSTATUS status;
3252
3253 /* use a new message structure so that we can modify it */
3254 msg = ldb_msg_new(ac);
3255 if (msg == NULL) {
3256 return ldb_operr(ldb);
3257 }
3258
3259 /* modify dn */
3260 msg->dn = ac->req->op.mod.message->dn;
3261
3262 orig_msg = ac->req->op.mod.message;
3263 searched_msg = ac->search_res->message;
3264
3265 /* Prepare the internal data structure containing the passwords */
3266 ret = setup_io(ac, orig_msg, searched_msg, &io);
3267 if (ret != LDB_SUCCESS) {
3268 return ret;
3269 }
3270
3271 /* Get the old password from the database */
3272 status = samdb_result_passwords(io.ac,
3273 lp_ctx,
3274 discard_const_p(struct ldb_message, searched_msg),
3275 &io.o.lm_hash, &io.o.nt_hash);
3276 if (!NT_STATUS_IS_OK(status)) {
3277 return ldb_operr(ldb);
3278 }
3279
3280 io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
3281 io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
3282 io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
3283
3284 ret = setup_password_fields(&io);
3285 if (ret != LDB_SUCCESS) {
3286 return ret;
3287 }
3288
3289 ret = check_password_restrictions(&io);
3290 if (ret != LDB_SUCCESS) {
3291 return ret;
3292 }
3293
3294 /* make sure we replace all the old attributes */
3295 ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
3296 ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
3297 ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3298 ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3299 ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
3300 ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
3301
3302 if (io.g.nt_hash) {
3303 ret = samdb_msg_add_hash(ldb, ac, msg,
3304 "unicodePwd", io.g.nt_hash);
3305 if (ret != LDB_SUCCESS) {
3306 return ret;
3307 }
3308 }
3309 if (io.g.lm_hash) {
3310 ret = samdb_msg_add_hash(ldb, ac, msg,
3311 "dBCSPwd", io.g.lm_hash);
3312 if (ret != LDB_SUCCESS) {
3313 return ret;
3314 }
3315 }
3316 if (io.g.nt_history_len > 0) {
3317 ret = samdb_msg_add_hashes(ldb, ac, msg,
3318 "ntPwdHistory",
3319 io.g.nt_history,
3320 io.g.nt_history_len);
3321 if (ret != LDB_SUCCESS) {
3322 return ret;
3323 }
3324 }
3325 if (io.g.lm_history_len > 0) {
3326 ret = samdb_msg_add_hashes(ldb, ac, msg,
3327 "lmPwdHistory",
3328 io.g.lm_history,
3329 io.g.lm_history_len);
3330 if (ret != LDB_SUCCESS) {
3331 return ret;
3332 }
3333 }
3334 if (io.g.supplemental.length > 0) {
3335 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3336 &io.g.supplemental, NULL);
3337 if (ret != LDB_SUCCESS) {
3338 return ret;
3339 }
3340 }
3341 ret = samdb_msg_add_uint64(ldb, ac, msg,
3342 "pwdLastSet",
3343 io.g.last_set);
3344 if (ret != LDB_SUCCESS) {
3345 return ret;
3346 }
3347
3348 ret = ldb_build_mod_req(&mod_req, ldb, ac,
3349 msg,
3350 ac->req->controls,
3351 ac, ph_op_callback,
3352 ac->req);
3353 LDB_REQ_SET_LOCATION(mod_req);
3354 if (ret != LDB_SUCCESS) {
3355 return ret;
3356 }
3357
3358 return ldb_next_request(ac->module, mod_req);
3359 }
3360
3361 static const struct ldb_module_ops ldb_password_hash_module_ops = {
3362 .name = "password_hash",
3363 .add = password_hash_add,
3364 .modify = password_hash_modify
3365 };
3366
3367 int ldb_password_hash_module_init(const char *version)
3368 {
3369 LDB_MODULE_CHECK_VERSION(version);
3370 return ldb_register_module(&ldb_password_hash_module_ops);
3371 }
WIP