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dsdb: Implement password lockout on LDAP password changes
[Samba.git] / source4 / dsdb / samdb / ldb_modules / password_hash.c
blob1dee6af8f39f118bd80fa68ff8c173989b074f5b
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 MD5_CTX 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 make_error_and_update_badPwdCount(struct setup_password_fields_io *io)
1876 {
1877 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1878 struct ldb_message *mod_msg = NULL;
1879 NTSTATUS status;
1880 int ret;
1881
1882 status = dsdb_update_bad_pwd_count(io->ac, ldb,
1883 io->ac->search_res->message,
1884 io->ac->dom_res->message,
1885 &mod_msg);
1886 if (!NT_STATUS_IS_OK(status)) {
1887 goto done;
1888 }
1889
1890 if (mod_msg == NULL) {
1891 goto done;
1892 }
1893
1894 /*
1895 * OK, horrible semantics ahead.
1896 *
1897 * - We need to abort any existing transaction
1898 * - create a transaction arround the badPwdCount update
1899 * - re-open the transaction so the upper layer
1900 * doesn't know what happened.
1901 *
1902 * This is needed because returning an error to the upper
1903 * layer will cancel the transaction and undo the badPwdCount
1904 * update.
1905 */
1906
1907 /*
1908 * Checking errors here is a bit pointless.
1909 * What can we do if we can't end the transaction?
1910 */
1911 ret = ldb_next_del_trans(io->ac->module);
1912 if (ret != LDB_SUCCESS) {
1913 ldb_debug(ldb, LDB_DEBUG_FATAL,
1914 "Failed to abort transaction prior to update of badPwdCount of %s: %s",
1915 ldb_dn_get_linearized(io->ac->search_res->message->dn),
1916 ldb_errstring(ldb));
1917 /*
1918 * just return the original error
1919 */
1920 goto done;
1921 }
1922
1923 /* Likewise, what should we do if we can't open a new transaction? */
1924 ret = ldb_next_start_trans(io->ac->module);
1925 if (ret != LDB_SUCCESS) {
1926 ldb_debug(ldb, LDB_DEBUG_ERROR,
1927 "Failed to open transaction to update badPwdCount of %s: %s",
1928 ldb_dn_get_linearized(io->ac->search_res->message->dn),
1929 ldb_errstring(ldb));
1930 /*
1931 * just return the original error
1932 */
1933 goto done;
1934 }
1935
1936 ret = dsdb_module_modify(io->ac->module, mod_msg,
1937 DSDB_FLAG_NEXT_MODULE,
1938 io->ac->req);
1939 if (ret != LDB_SUCCESS) {
1940 ldb_debug(ldb, LDB_DEBUG_ERROR,
1941 "Failed to update badPwdCount of %s: %s",
1942 ldb_dn_get_linearized(io->ac->search_res->message->dn),
1943 ldb_errstring(ldb));
1944 /*
1945 * We can only ignore this...
1946 */
1947 }
1948
1949 ret = ldb_next_end_trans(io->ac->module);
1950 if (ret != LDB_SUCCESS) {
1951 ldb_debug(ldb, LDB_DEBUG_ERROR,
1952 "Failed to close transaction to update badPwdCount of %s: %s",
1953 ldb_dn_get_linearized(io->ac->search_res->message->dn),
1954 ldb_errstring(ldb));
1955 /*
1956 * We can only ignore this...
1957 */
1958 }
1959
1960 ret = ldb_next_start_trans(io->ac->module);
1961 if (ret != LDB_SUCCESS) {
1962 ldb_debug(ldb, LDB_DEBUG_ERROR,
1963 "Failed to open transaction after update of badPwdCount of %s: %s",
1964 ldb_dn_get_linearized(io->ac->search_res->message->dn),
1965 ldb_errstring(ldb));
1966 /*
1967 * We can only ignore this...
1968 */
1969 }
1970
1971 done:
1972 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1973 ldb_asprintf_errstring(ldb,
1974 "%08X: %s - check_password_restrictions: "
1975 "The old password specified doesn't match!",
1976 W_ERROR_V(WERR_INVALID_PASSWORD),
1977 ldb_strerror(ret));
1978 return ret;
1979 }
1980
1981 static int check_password_restrictions(struct setup_password_fields_io *io)
1982 {
1983 struct ldb_context *ldb;
1984 int ret;
1985
1986 ldb = ldb_module_get_ctx(io->ac->module);
1987
1988 /* First check the old password is correct, for password changes */
1989 if (!io->ac->pwd_reset) {
1990 bool nt_hash_checked = false;
1991
1992 /* we need the old nt or lm hash given by the client */
1993 if (!io->og.nt_hash && !io->og.lm_hash) {
1994 ldb_asprintf_errstring(ldb,
1995 "check_password_restrictions: "
1996 "You need to provide the old password in order "
1997 "to change it!");
1998 return LDB_ERR_UNWILLING_TO_PERFORM;
1999 }
2000
2001 /* The password modify through the NT hash is encouraged and
2002 has no problems at all */
2003 if (io->og.nt_hash) {
2004 if (!io->o.nt_hash || memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
2005 return make_error_and_update_badPwdCount(io);
2006 }
2007
2008 nt_hash_checked = true;
2009 }
2010
2011 /* But it is also possible to change a password by the LM hash
2012 * alone for compatibility reasons. This check is optional if
2013 * the NT hash was already checked - otherwise it's mandatory.
2014 * (as the SAMR operations request it). */
2015 if (io->og.lm_hash) {
2016 if ((!io->o.lm_hash && !nt_hash_checked)
2017 || (io->o.lm_hash && memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0)) {
2018 return make_error_and_update_badPwdCount(io);
2019 }
2020 }
2021 }
2022
2023 if (io->u.restrictions == 0) {
2024 /* FIXME: Is this right? */
2025 return LDB_SUCCESS;
2026 }
2027
2028 /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
2029 if ((io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) &&
2030 !io->ac->pwd_reset)
2031 {
2032 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2033 ldb_asprintf_errstring(ldb,
2034 "%08X: %s - check_password_restrictions: "
2035 "password is too young to change!",
2036 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2037 ldb_strerror(ret));
2038 return ret;
2039 }
2040
2041 /*
2042 * Fundamental password checks done by the call
2043 * "samdb_check_password".
2044 * It is also in use by "dcesrv_samr_ValidatePassword".
2045 */
2046 if (io->n.cleartext_utf8 != NULL) {
2047 enum samr_ValidationStatus vstat;
2048 vstat = samdb_check_password(io->n.cleartext_utf8,
2049 io->ac->status->domain_data.pwdProperties,
2050 io->ac->status->domain_data.minPwdLength);
2051 switch (vstat) {
2052 case SAMR_VALIDATION_STATUS_SUCCESS:
2053 /* perfect -> proceed! */
2054 break;
2055
2056 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
2057 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2058 ldb_asprintf_errstring(ldb,
2059 "%08X: %s - check_password_restrictions: "
2060 "the password is too short. It should be equal or longer than %u characters!",
2061 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2062 ldb_strerror(ret),
2063 io->ac->status->domain_data.minPwdLength);
2064 io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
2065 return ret;
2066
2067 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
2068 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2069 ldb_asprintf_errstring(ldb,
2070 "%08X: %s - check_password_restrictions: "
2071 "the password does not meet the complexity criteria!",
2072 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2073 ldb_strerror(ret));
2074 io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
2075 return ret;
2076
2077 default:
2078 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2079 ldb_asprintf_errstring(ldb,
2080 "%08X: %s - check_password_restrictions: "
2081 "the password doesn't fit by a certain reason!",
2082 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2083 ldb_strerror(ret));
2084 return ret;
2085 }
2086 }
2087
2088 if (io->ac->pwd_reset) {
2089 return LDB_SUCCESS;
2090 }
2091
2092 if (io->n.nt_hash) {
2093 uint32_t i;
2094
2095 /* checks the NT hash password history */
2096 for (i = 0; i < io->o.nt_history_len; i++) {
2097 ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
2098 if (ret == 0) {
2099 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2100 ldb_asprintf_errstring(ldb,
2101 "%08X: %s - check_password_restrictions: "
2102 "the password was already used (in history)!",
2103 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2104 ldb_strerror(ret));
2105 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2106 return ret;
2107 }
2108 }
2109 }
2110
2111 if (io->n.lm_hash) {
2112 uint32_t i;
2113
2114 /* checks the LM hash password history */
2115 for (i = 0; i < io->o.lm_history_len; i++) {
2116 ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
2117 if (ret == 0) {
2118 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2119 ldb_asprintf_errstring(ldb,
2120 "%08X: %s - check_password_restrictions: "
2121 "the password was already used (in history)!",
2122 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2123 ldb_strerror(ret));
2124 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2125 return ret;
2126 }
2127 }
2128 }
2129
2130 /* are all password changes disallowed? */
2131 if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
2132 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2133 ldb_asprintf_errstring(ldb,
2134 "%08X: %s - check_password_restrictions: "
2135 "password changes disabled!",
2136 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2137 ldb_strerror(ret));
2138 return ret;
2139 }
2140
2141 /* can this user change the password? */
2142 if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
2143 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2144 ldb_asprintf_errstring(ldb,
2145 "%08X: %s - check_password_restrictions: "
2146 "password can't be changed on this account!",
2147 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2148 ldb_strerror(ret));
2149 return ret;
2150 }
2151
2152 return LDB_SUCCESS;
2153 }
2154
2155 /*
2156 * This is intended for use by the "password_hash" module since there
2157 * password changes can be specified through one message element with the
2158 * new password (to set) and another one with the old password (to unset).
2159 *
2160 * The first which sets a password (new value) can have flags
2161 * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
2162 * for entries). The latter (old value) has always specified
2163 * LDB_FLAG_MOD_DELETE.
2164 *
2165 * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
2166 * matching message elements are malformed in respect to the set/change rules.
2167 * Otherwise it returns LDB_SUCCESS.
2168 */
2169 static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
2170 const char *name,
2171 enum ldb_request_type operation,
2172 const struct ldb_val **new_val,
2173 const struct ldb_val **old_val)
2174 {
2175 unsigned int i;
2176
2177 *new_val = NULL;
2178 *old_val = NULL;
2179
2180 if (msg == NULL) {
2181 return LDB_SUCCESS;
2182 }
2183
2184 for (i = 0; i < msg->num_elements; i++) {
2185 if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
2186 continue;
2187 }
2188
2189 if ((operation == LDB_MODIFY) &&
2190 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
2191 /* 0 values are allowed */
2192 if (msg->elements[i].num_values == 1) {
2193 *old_val = &msg->elements[i].values[0];
2194 } else if (msg->elements[i].num_values > 1) {
2195 return LDB_ERR_CONSTRAINT_VIOLATION;
2196 }
2197 } else if ((operation == LDB_MODIFY) &&
2198 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
2199 if (msg->elements[i].num_values > 0) {
2200 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2201 } else {
2202 return LDB_ERR_UNWILLING_TO_PERFORM;
2203 }
2204 } else {
2205 /* Add operations and LDB_FLAG_MOD_ADD */
2206 if (msg->elements[i].num_values > 0) {
2207 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2208 } else {
2209 return LDB_ERR_CONSTRAINT_VIOLATION;
2210 }
2211 }
2212 }
2213
2214 return LDB_SUCCESS;
2215 }
2216
2217 static int setup_io(struct ph_context *ac,
2218 const struct ldb_message *orig_msg,
2219 const struct ldb_message *searched_msg,
2220 struct setup_password_fields_io *io)
2221 {
2222 const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
2223 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2224 struct loadparm_context *lp_ctx =
2225 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2226 struct loadparm_context);
2227 int ret;
2228
2229 ZERO_STRUCTP(io);
2230
2231 /* Some operations below require kerberos contexts */
2232
2233 if (smb_krb5_init_context(ac,
2234 ldb_get_event_context(ldb),
2235 (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
2236 &io->smb_krb5_context) != 0) {
2237 return ldb_operr(ldb);
2238 }
2239
2240 io->ac = ac;
2241
2242 io->u.userAccountControl = ldb_msg_find_attr_as_uint(searched_msg,
2243 "userAccountControl", 0);
2244 io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
2245 io->u.sAMAccountName = ldb_msg_find_attr_as_string(searched_msg,
2246 "sAMAccountName", NULL);
2247 io->u.user_principal_name = ldb_msg_find_attr_as_string(searched_msg,
2248 "userPrincipalName", NULL);
2249 io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
2250
2251 if (io->u.sAMAccountName == NULL) {
2252 ldb_asprintf_errstring(ldb,
2253 "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
2254 ldb_dn_get_linearized(searched_msg->dn));
2255
2256 return LDB_ERR_CONSTRAINT_VIOLATION;
2257 }
2258
2259 /* Only non-trust accounts have restrictions (possibly this test is the
2260 * wrong way around, but we like to be restrictive if possible */
2261 io->u.restrictions = !(io->u.userAccountControl
2262 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
2263 | UF_SERVER_TRUST_ACCOUNT));
2264
2265 if (ac->userPassword) {
2266 ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
2267 ac->req->operation,
2268 &io->n.cleartext_utf8,
2269 &io->og.cleartext_utf8);
2270 if (ret != LDB_SUCCESS) {
2271 ldb_asprintf_errstring(ldb,
2272 "setup_io: "
2273 "it's only allowed to set the old password once!");
2274 return ret;
2275 }
2276 }
2277
2278 if (io->n.cleartext_utf8 != NULL) {
2279 struct ldb_val *cleartext_utf8_blob;
2280 char *p;
2281
2282 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
2283 if (!cleartext_utf8_blob) {
2284 return ldb_oom(ldb);
2285 }
2286
2287 *cleartext_utf8_blob = *io->n.cleartext_utf8;
2288
2289 /* make sure we have a null terminated string */
2290 p = talloc_strndup(cleartext_utf8_blob,
2291 (const char *)io->n.cleartext_utf8->data,
2292 io->n.cleartext_utf8->length);
2293 if ((p == NULL) && (io->n.cleartext_utf8->length > 0)) {
2294 return ldb_oom(ldb);
2295 }
2296 cleartext_utf8_blob->data = (uint8_t *)p;
2297
2298 io->n.cleartext_utf8 = cleartext_utf8_blob;
2299 }
2300
2301 ret = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
2302 ac->req->operation,
2303 &io->n.cleartext_utf16,
2304 &io->og.cleartext_utf16);
2305 if (ret != LDB_SUCCESS) {
2306 ldb_asprintf_errstring(ldb,
2307 "setup_io: "
2308 "it's only allowed to set the old password once!");
2309 return ret;
2310 }
2311
2312 /* this rather strange looking piece of code is there to
2313 handle a ldap client setting a password remotely using the
2314 unicodePwd ldap field. The syntax is that the password is
2315 in UTF-16LE, with a " at either end. Unfortunately the
2316 unicodePwd field is also used to store the nt hashes
2317 internally in Samba, and is used in the nt hash format on
2318 the wire in DRS replication, so we have a single name for
2319 two distinct values. The code below leaves us with a small
2320 chance (less than 1 in 2^32) of a mixup, if someone manages
2321 to create a MD4 hash which starts and ends in 0x22 0x00, as
2322 that would then be treated as a UTF16 password rather than
2323 a nthash */
2324
2325 ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
2326 ac->req->operation,
2327 &quoted_utf16,
2328 &old_quoted_utf16);
2329 if (ret != LDB_SUCCESS) {
2330 ldb_asprintf_errstring(ldb,
2331 "setup_io: "
2332 "it's only allowed to set the old password once!");
2333 return ret;
2334 }
2335
2336 /* Checks and converts the actual "unicodePwd" attribute */
2337 if (!ac->hash_values &&
2338 quoted_utf16 &&
2339 quoted_utf16->length >= 4 &&
2340 quoted_utf16->data[0] == '"' &&
2341 quoted_utf16->data[1] == 0 &&
2342 quoted_utf16->data[quoted_utf16->length-2] == '"' &&
2343 quoted_utf16->data[quoted_utf16->length-1] == 0) {
2344 struct ldb_val *quoted_utf16_2;
2345
2346 if (io->n.cleartext_utf16) {
2347 /* refuse the change if someone wants to change with
2348 with both UTF16 possibilities at the same time... */
2349 ldb_asprintf_errstring(ldb,
2350 "setup_io: "
2351 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2352 return LDB_ERR_UNWILLING_TO_PERFORM;
2353 }
2354
2355 /*
2356 * adapt the quoted UTF16 string to be a real
2357 * cleartext one
2358 */
2359 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2360 if (quoted_utf16_2 == NULL) {
2361 return ldb_oom(ldb);
2362 }
2363
2364 quoted_utf16_2->data = quoted_utf16->data + 2;
2365 quoted_utf16_2->length = quoted_utf16->length-4;
2366 io->n.cleartext_utf16 = quoted_utf16_2;
2367 io->n.nt_hash = NULL;
2368
2369 } else if (quoted_utf16) {
2370 /* We have only the hash available -> so no plaintext here */
2371 if (!ac->hash_values) {
2372 /* refuse the change if someone wants to change
2373 the hash without control specified... */
2374 ldb_asprintf_errstring(ldb,
2375 "setup_io: "
2376 "it's not allowed to set the NT hash password directly'");
2377 /* this looks odd but this is what Windows does:
2378 returns "UNWILLING_TO_PERFORM" on wrong
2379 password sets and "CONSTRAINT_VIOLATION" on
2380 wrong password changes. */
2381 if (old_quoted_utf16 == NULL) {
2382 return LDB_ERR_UNWILLING_TO_PERFORM;
2383 }
2384
2385 return LDB_ERR_CONSTRAINT_VIOLATION;
2386 }
2387
2388 io->n.nt_hash = talloc(io->ac, struct samr_Password);
2389 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
2390 MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
2391 }
2392
2393 /* Checks and converts the previous "unicodePwd" attribute */
2394 if (!ac->hash_values &&
2395 old_quoted_utf16 &&
2396 old_quoted_utf16->length >= 4 &&
2397 old_quoted_utf16->data[0] == '"' &&
2398 old_quoted_utf16->data[1] == 0 &&
2399 old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
2400 old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
2401 struct ldb_val *old_quoted_utf16_2;
2402
2403 if (io->og.cleartext_utf16) {
2404 /* refuse the change if someone wants to change with
2405 both UTF16 possibilities at the same time... */
2406 ldb_asprintf_errstring(ldb,
2407 "setup_io: "
2408 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2409 return LDB_ERR_UNWILLING_TO_PERFORM;
2410 }
2411
2412 /*
2413 * adapt the quoted UTF16 string to be a real
2414 * cleartext one
2415 */
2416 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2417 if (old_quoted_utf16_2 == NULL) {
2418 return ldb_oom(ldb);
2419 }
2420
2421 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
2422 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
2423
2424 io->og.cleartext_utf16 = old_quoted_utf16_2;
2425 io->og.nt_hash = NULL;
2426 } else if (old_quoted_utf16) {
2427 /* We have only the hash available -> so no plaintext here */
2428 if (!ac->hash_values) {
2429 /* refuse the change if someone wants to change
2430 the hash without control specified... */
2431 ldb_asprintf_errstring(ldb,
2432 "setup_io: "
2433 "it's not allowed to set the NT hash password directly'");
2434 return LDB_ERR_UNWILLING_TO_PERFORM;
2435 }
2436
2437 io->og.nt_hash = talloc(io->ac, struct samr_Password);
2438 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
2439 MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
2440 }
2441
2442 /* Handles the "dBCSPwd" attribute (LM hash) */
2443 io->n.lm_hash = NULL; io->og.lm_hash = NULL;
2444 ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
2445 ac->req->operation,
2446 &lm_hash, &old_lm_hash);
2447 if (ret != LDB_SUCCESS) {
2448 ldb_asprintf_errstring(ldb,
2449 "setup_io: "
2450 "it's only allowed to set the old password once!");
2451 return ret;
2452 }
2453
2454 if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
2455 /* refuse the change if someone wants to change the hash
2456 without control specified... */
2457 ldb_asprintf_errstring(ldb,
2458 "setup_io: "
2459 "it's not allowed to set the LM hash password directly'");
2460 return LDB_ERR_UNWILLING_TO_PERFORM;
2461 }
2462
2463 if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
2464 io->n.lm_hash = talloc(io->ac, struct samr_Password);
2465 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
2466 sizeof(io->n.lm_hash->hash)));
2467 }
2468 if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
2469 io->og.lm_hash = talloc(io->ac, struct samr_Password);
2470 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
2471 sizeof(io->og.lm_hash->hash)));
2472 }
2473
2474 /*
2475 * Handles the password change control if it's specified. It has the
2476 * precedance and overrides already specified old password values of
2477 * change requests (but that shouldn't happen since the control is
2478 * fully internal and only used in conjunction with replace requests!).
2479 */
2480 if (ac->change != NULL) {
2481 io->og.nt_hash = NULL;
2482 if (ac->change->old_nt_pwd_hash != NULL) {
2483 io->og.nt_hash = talloc_memdup(io->ac,
2484 ac->change->old_nt_pwd_hash,
2485 sizeof(struct samr_Password));
2486 }
2487 io->og.lm_hash = NULL;
2488 if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
2489 io->og.lm_hash = talloc_memdup(io->ac,
2490 ac->change->old_lm_pwd_hash,
2491 sizeof(struct samr_Password));
2492 }
2493 }
2494
2495 /* refuse the change if someone wants to change the clear-
2496 text and supply his own hashes at the same time... */
2497 if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
2498 && (io->n.nt_hash || io->n.lm_hash)) {
2499 ldb_asprintf_errstring(ldb,
2500 "setup_io: "
2501 "it's only allowed to set the password in form of cleartext attributes or as hashes");
2502 return LDB_ERR_UNWILLING_TO_PERFORM;
2503 }
2504
2505 /* refuse the change if someone wants to change the password
2506 using both plaintext methods (UTF8 and UTF16) at the same time... */
2507 if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
2508 ldb_asprintf_errstring(ldb,
2509 "setup_io: "
2510 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2511 return LDB_ERR_UNWILLING_TO_PERFORM;
2512 }
2513
2514 /* refuse the change if someone tries to set/change the password by
2515 * the lanman hash alone and we've deactivated that mechanism. This
2516 * would end in an account without any password! */
2517 if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
2518 && (!io->n.nt_hash) && (!io->n.lm_hash)) {
2519 ldb_asprintf_errstring(ldb,
2520 "setup_io: "
2521 "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
2522 /* on "userPassword" and "clearTextPassword" we've to return
2523 * something different, since these are virtual attributes */
2524 if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
2525 (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
2526 return LDB_ERR_CONSTRAINT_VIOLATION;
2527 }
2528 return LDB_ERR_UNWILLING_TO_PERFORM;
2529 }
2530
2531 /* refuse the change if someone wants to compare against a plaintext
2532 or hash at the same time for a "password modify" operation... */
2533 if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
2534 && (io->og.nt_hash || io->og.lm_hash)) {
2535 ldb_asprintf_errstring(ldb,
2536 "setup_io: "
2537 "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
2538 return LDB_ERR_UNWILLING_TO_PERFORM;
2539 }
2540
2541 /* refuse the change if someone wants to compare against both
2542 * plaintexts at the same time for a "password modify" operation... */
2543 if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
2544 ldb_asprintf_errstring(ldb,
2545 "setup_io: "
2546 "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2547 return LDB_ERR_UNWILLING_TO_PERFORM;
2548 }
2549
2550 /* Decides if we have a password modify or password reset operation */
2551 if (ac->req->operation == LDB_ADD) {
2552 /* On "add" we have only "password reset" */
2553 ac->pwd_reset = true;
2554 } else if (ac->req->operation == LDB_MODIFY) {
2555 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
2556 || io->og.nt_hash || io->og.lm_hash) {
2557 /* If we have an old password specified then for sure it
2558 * is a user "password change" */
2559 ac->pwd_reset = false;
2560 } else {
2561 /* Otherwise we have also here a "password reset" */
2562 ac->pwd_reset = true;
2563 }
2564 } else {
2565 /* this shouldn't happen */
2566 return ldb_operr(ldb);
2567 }
2568
2569 return LDB_SUCCESS;
2570 }
2571
2572 static struct ph_context *ph_init_context(struct ldb_module *module,
2573 struct ldb_request *req,
2574 bool userPassword)
2575 {
2576 struct ldb_context *ldb;
2577 struct ph_context *ac;
2578
2579 ldb = ldb_module_get_ctx(module);
2580
2581 ac = talloc_zero(req, struct ph_context);
2582 if (ac == NULL) {
2583 ldb_set_errstring(ldb, "Out of Memory");
2584 return NULL;
2585 }
2586
2587 ac->module = module;
2588 ac->req = req;
2589 ac->userPassword = userPassword;
2590
2591 return ac;
2592 }
2593
2594 static void ph_apply_controls(struct ph_context *ac)
2595 {
2596 struct ldb_control *ctrl;
2597
2598 ac->change_status = false;
2599 ctrl = ldb_request_get_control(ac->req,
2600 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
2601 if (ctrl != NULL) {
2602 ac->change_status = true;
2603
2604 /* Mark the "change status" control as uncritical (done) */
2605 ctrl->critical = false;
2606 }
2607
2608 ac->hash_values = false;
2609 ctrl = ldb_request_get_control(ac->req,
2610 DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
2611 if (ctrl != NULL) {
2612 ac->hash_values = true;
2613
2614 /* Mark the "hash values" control as uncritical (done) */
2615 ctrl->critical = false;
2616 }
2617
2618 ctrl = ldb_request_get_control(ac->req,
2619 DSDB_CONTROL_PASSWORD_CHANGE_OID);
2620 if (ctrl != NULL) {
2621 ac->change = (struct dsdb_control_password_change *) ctrl->data;
2622
2623 /* Mark the "change" control as uncritical (done) */
2624 ctrl->critical = false;
2625 }
2626
2627 ac->pwd_last_set_bypass = false;
2628 ctrl = ldb_request_get_control(ac->req,
2629 DSDB_CONTROL_PASSWORD_BYPASS_LAST_SET_OID);
2630 if (ctrl != NULL) {
2631 ac->pwd_last_set_bypass = true;
2632
2633 /* Mark the "bypass pwdLastSet" control as uncritical (done) */
2634 ctrl->critical = false;
2635 }
2636 }
2637
2638 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
2639 {
2640 struct ph_context *ac;
2641
2642 ac = talloc_get_type(req->context, struct ph_context);
2643
2644 if (!ares) {
2645 return ldb_module_done(ac->req, NULL, NULL,
2646 LDB_ERR_OPERATIONS_ERROR);
2647 }
2648
2649 if (ares->type == LDB_REPLY_REFERRAL) {
2650 return ldb_module_send_referral(ac->req, ares->referral);
2651 }
2652
2653 if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2654 /* On success and trivial errors a status control is being
2655 * added (used for example by the "samdb_set_password" call) */
2656 ldb_reply_add_control(ares,
2657 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2658 false,
2659 ac->status);
2660 }
2661
2662 if (ares->error != LDB_SUCCESS) {
2663 return ldb_module_done(ac->req, ares->controls,
2664 ares->response, ares->error);
2665 }
2666
2667 if (ares->type != LDB_REPLY_DONE) {
2668 talloc_free(ares);
2669 return ldb_module_done(ac->req, NULL, NULL,
2670 LDB_ERR_OPERATIONS_ERROR);
2671 }
2672
2673 return ldb_module_done(ac->req, ares->controls,
2674 ares->response, ares->error);
2675 }
2676
2677 static int password_hash_add_do_add(struct ph_context *ac);
2678 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2679 static int password_hash_mod_search_self(struct ph_context *ac);
2680 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2681 static int password_hash_mod_do_mod(struct ph_context *ac);
2682
2683 static int get_domain_data_callback(struct ldb_request *req,
2684 struct ldb_reply *ares)
2685 {
2686 struct ldb_context *ldb;
2687 struct ph_context *ac;
2688 struct loadparm_context *lp_ctx;
2689 int ret = LDB_SUCCESS;
2690
2691 ac = talloc_get_type(req->context, struct ph_context);
2692 ldb = ldb_module_get_ctx(ac->module);
2693
2694 if (!ares) {
2695 ret = LDB_ERR_OPERATIONS_ERROR;
2696 goto done;
2697 }
2698 if (ares->error != LDB_SUCCESS) {
2699 return ldb_module_done(ac->req, ares->controls,
2700 ares->response, ares->error);
2701 }
2702
2703 switch (ares->type) {
2704 case LDB_REPLY_ENTRY:
2705 if (ac->status != NULL) {
2706 talloc_free(ares);
2707
2708 ldb_set_errstring(ldb, "Too many results");
2709 ret = LDB_ERR_OPERATIONS_ERROR;
2710 goto done;
2711 }
2712
2713 /* Setup the "status" structure (used as control later) */
2714 ac->status = talloc_zero(ac->req,
2715 struct dsdb_control_password_change_status);
2716 if (ac->status == NULL) {
2717 talloc_free(ares);
2718
2719 ldb_oom(ldb);
2720 ret = LDB_ERR_OPERATIONS_ERROR;
2721 goto done;
2722 }
2723
2724 /* Setup the "domain data" structure */
2725 ac->status->domain_data.pwdProperties =
2726 ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
2727 ac->status->domain_data.pwdHistoryLength =
2728 ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
2729 ac->status->domain_data.maxPwdAge =
2730 ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
2731 ac->status->domain_data.minPwdAge =
2732 ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
2733 ac->status->domain_data.minPwdLength =
2734 ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
2735 ac->status->domain_data.store_cleartext =
2736 ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2737
2738 /* For a domain DN, this puts things in dotted notation */
2739 /* For builtin domains, this will give details for the host,
2740 * but that doesn't really matter, as it's just used for salt
2741 * and kerberos principals, which don't exist here */
2742
2743 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2744 struct loadparm_context);
2745
2746 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2747 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2748 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2749
2750 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2751
2752 if (ac->dom_res != NULL) {
2753 talloc_free(ares);
2754
2755 ldb_set_errstring(ldb, "Too many results");
2756 ret = LDB_ERR_OPERATIONS_ERROR;
2757 goto done;
2758 }
2759
2760 ac->dom_res = talloc_steal(ac, ares);
2761 ret = LDB_SUCCESS;
2762 break;
2763
2764 case LDB_REPLY_REFERRAL:
2765 /* ignore */
2766 talloc_free(ares);
2767 ret = LDB_SUCCESS;
2768 break;
2769
2770 case LDB_REPLY_DONE:
2771 talloc_free(ares);
2772 /* call the next step */
2773 switch (ac->req->operation) {
2774 case LDB_ADD:
2775 ret = password_hash_add_do_add(ac);
2776 break;
2777
2778 case LDB_MODIFY:
2779 ret = password_hash_mod_do_mod(ac);
2780 break;
2781
2782 default:
2783 ret = LDB_ERR_OPERATIONS_ERROR;
2784 break;
2785 }
2786 break;
2787 }
2788
2789 done:
2790 if (ret != LDB_SUCCESS) {
2791 struct ldb_reply *new_ares;
2792
2793 new_ares = talloc_zero(ac->req, struct ldb_reply);
2794 if (new_ares == NULL) {
2795 ldb_oom(ldb);
2796 return ldb_module_done(ac->req, NULL, NULL,
2797 LDB_ERR_OPERATIONS_ERROR);
2798 }
2799
2800 new_ares->error = ret;
2801 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2802 /* On success and trivial errors a status control is being
2803 * added (used for example by the "samdb_set_password" call) */
2804 ldb_reply_add_control(new_ares,
2805 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2806 false,
2807 ac->status);
2808 }
2809
2810 return ldb_module_done(ac->req, new_ares->controls,
2811 new_ares->response, new_ares->error);
2812 }
2813
2814 return LDB_SUCCESS;
2815 }
2816
2817 static int build_domain_data_request(struct ph_context *ac)
2818 {
2819 /* attrs[] is returned from this function in
2820 ac->dom_req->op.search.attrs, so it must be static, as
2821 otherwise the compiler can put it on the stack */
2822 struct ldb_context *ldb;
2823 static const char * const attrs[] = { "pwdProperties",
2824 "pwdHistoryLength",
2825 "maxPwdAge",
2826 "minPwdAge",
2827 "minPwdLength",
2828 "lockoutThreshold",
2829 "lockOutObservationWindow",
2830 NULL };
2831 int ret;
2832
2833 ldb = ldb_module_get_ctx(ac->module);
2834
2835 ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
2836 ldb_get_default_basedn(ldb),
2837 LDB_SCOPE_BASE,
2838 NULL, attrs,
2839 NULL,
2840 ac, get_domain_data_callback,
2841 ac->req);
2842 LDB_REQ_SET_LOCATION(ac->dom_req);
2843 return ret;
2844 }
2845
2846 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2847 {
2848 struct ldb_context *ldb;
2849 struct ph_context *ac;
2850 struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2851 *ntAttr, *lmAttr;
2852 int ret;
2853 struct ldb_control *bypass = NULL;
2854 bool userPassword = dsdb_user_password_support(module, req, req);
2855
2856 ldb = ldb_module_get_ctx(module);
2857
2858 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2859
2860 if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2861 return ldb_next_request(module, req);
2862 }
2863
2864 bypass = ldb_request_get_control(req,
2865 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2866 if (bypass != NULL) {
2867 /* Mark the "bypass" control as uncritical (done) */
2868 bypass->critical = false;
2869 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2870 return password_hash_bypass(module, req);
2871 }
2872
2873 /* nobody must touch password histories and 'supplementalCredentials' */
2874 if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2875 return LDB_ERR_UNWILLING_TO_PERFORM;
2876 }
2877 if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2878 return LDB_ERR_UNWILLING_TO_PERFORM;
2879 }
2880 if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2881 return LDB_ERR_UNWILLING_TO_PERFORM;
2882 }
2883
2884 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2885 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2886
2887 userPasswordAttr = NULL;
2888 if (userPassword) {
2889 userPasswordAttr = ldb_msg_find_element(req->op.add.message,
2890 "userPassword");
2891 /* MS-ADTS 3.1.1.3.1.5.2 */
2892 if ((userPasswordAttr != NULL) &&
2893 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2894 return LDB_ERR_CONSTRAINT_VIOLATION;
2895 }
2896 }
2897 clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2898 ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2899 lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2900
2901 if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2902 return ldb_next_request(module, req);
2903 }
2904
2905 /* Make sure we are performing the password set action on a (for us)
2906 * valid object. Those are instances of either "user" and/or
2907 * "inetOrgPerson". Otherwise continue with the submodules. */
2908 if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2909 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2910
2911 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2912 ldb_set_errstring(ldb,
2913 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2914 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2915 }
2916
2917 return ldb_next_request(module, req);
2918 }
2919
2920 ac = ph_init_context(module, req, userPassword);
2921 if (ac == NULL) {
2922 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2923 return ldb_operr(ldb);
2924 }
2925 ph_apply_controls(ac);
2926
2927 /* get user domain data */
2928 ret = build_domain_data_request(ac);
2929 if (ret != LDB_SUCCESS) {
2930 return ret;
2931 }
2932
2933 return ldb_next_request(module, ac->dom_req);
2934 }
2935
2936 static int password_hash_add_do_add(struct ph_context *ac)
2937 {
2938 struct ldb_context *ldb;
2939 struct ldb_request *down_req;
2940 struct ldb_message *msg;
2941 struct setup_password_fields_io io;
2942 int ret;
2943
2944 /* Prepare the internal data structure containing the passwords */
2945 ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2946 if (ret != LDB_SUCCESS) {
2947 return ret;
2948 }
2949
2950 ldb = ldb_module_get_ctx(ac->module);
2951
2952 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2953 if (msg == NULL) {
2954 return ldb_operr(ldb);
2955 }
2956
2957 /* remove attributes that we just read into 'io' */
2958 if (ac->userPassword) {
2959 ldb_msg_remove_attr(msg, "userPassword");
2960 }
2961 ldb_msg_remove_attr(msg, "clearTextPassword");
2962 ldb_msg_remove_attr(msg, "unicodePwd");
2963 ldb_msg_remove_attr(msg, "dBCSPwd");
2964 ldb_msg_remove_attr(msg, "pwdLastSet");
2965
2966 ret = setup_password_fields(&io);
2967 if (ret != LDB_SUCCESS) {
2968 return ret;
2969 }
2970
2971 ret = check_password_restrictions(&io);
2972 if (ret != LDB_SUCCESS) {
2973 return ret;
2974 }
2975
2976 if (io.g.nt_hash) {
2977 ret = samdb_msg_add_hash(ldb, ac, msg,
2978 "unicodePwd", io.g.nt_hash);
2979 if (ret != LDB_SUCCESS) {
2980 return ret;
2981 }
2982 }
2983 if (io.g.lm_hash) {
2984 ret = samdb_msg_add_hash(ldb, ac, msg,
2985 "dBCSPwd", io.g.lm_hash);
2986 if (ret != LDB_SUCCESS) {
2987 return ret;
2988 }
2989 }
2990 if (io.g.nt_history_len > 0) {
2991 ret = samdb_msg_add_hashes(ldb, ac, msg,
2992 "ntPwdHistory",
2993 io.g.nt_history,
2994 io.g.nt_history_len);
2995 if (ret != LDB_SUCCESS) {
2996 return ret;
2997 }
2998 }
2999 if (io.g.lm_history_len > 0) {
3000 ret = samdb_msg_add_hashes(ldb, ac, msg,
3001 "lmPwdHistory",
3002 io.g.lm_history,
3003 io.g.lm_history_len);
3004 if (ret != LDB_SUCCESS) {
3005 return ret;
3006 }
3007 }
3008 if (io.g.supplemental.length > 0) {
3009 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3010 &io.g.supplemental, NULL);
3011 if (ret != LDB_SUCCESS) {
3012 return ret;
3013 }
3014 }
3015 ret = samdb_msg_add_uint64(ldb, ac, msg,
3016 "pwdLastSet",
3017 io.g.last_set);
3018 if (ret != LDB_SUCCESS) {
3019 return ret;
3020 }
3021
3022 ret = ldb_build_add_req(&down_req, ldb, ac,
3023 msg,
3024 ac->req->controls,
3025 ac, ph_op_callback,
3026 ac->req);
3027 LDB_REQ_SET_LOCATION(down_req);
3028 if (ret != LDB_SUCCESS) {
3029 return ret;
3030 }
3031
3032 return ldb_next_request(ac->module, down_req);
3033 }
3034
3035 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
3036 {
3037 struct ldb_context *ldb;
3038 struct ph_context *ac;
3039 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
3040 "unicodePwd", "dBCSPwd", NULL }, **l;
3041 unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
3042 struct ldb_message_element *passwordAttr;
3043 struct ldb_message *msg;
3044 struct ldb_request *down_req;
3045 int ret;
3046 struct ldb_control *bypass = NULL;
3047 bool userPassword = dsdb_user_password_support(module, req, req);
3048
3049 ldb = ldb_module_get_ctx(module);
3050
3051 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
3052
3053 if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
3054 return ldb_next_request(module, req);
3055 }
3056
3057 bypass = ldb_request_get_control(req,
3058 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
3059 if (bypass != NULL) {
3060 /* Mark the "bypass" control as uncritical (done) */
3061 bypass->critical = false;
3062 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
3063 return password_hash_bypass(module, req);
3064 }
3065
3066 /* nobody must touch password histories and 'supplementalCredentials' */
3067 if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
3068 return LDB_ERR_UNWILLING_TO_PERFORM;
3069 }
3070 if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
3071 return LDB_ERR_UNWILLING_TO_PERFORM;
3072 }
3073 if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
3074 return LDB_ERR_UNWILLING_TO_PERFORM;
3075 }
3076
3077 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
3078 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
3079 * For password changes/set there should be a 'delete' or a 'modify'
3080 * on these attributes. */
3081 attr_cnt = 0;
3082 for (l = passwordAttrs; *l != NULL; l++) {
3083 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
3084 continue;
3085 }
3086
3087 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
3088 /* MS-ADTS 3.1.1.3.1.5.2 */
3089 if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
3090 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
3091 return LDB_ERR_CONSTRAINT_VIOLATION;
3092 }
3093
3094 ++attr_cnt;
3095 }
3096 }
3097 if (attr_cnt == 0) {
3098 return ldb_next_request(module, req);
3099 }
3100
3101 ac = ph_init_context(module, req, userPassword);
3102 if (!ac) {
3103 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
3104 return ldb_operr(ldb);
3105 }
3106 ph_apply_controls(ac);
3107
3108 /* use a new message structure so that we can modify it */
3109 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
3110 if (msg == NULL) {
3111 return ldb_oom(ldb);
3112 }
3113
3114 /* - check for single-valued password attributes
3115 * (if not return "CONSTRAINT_VIOLATION")
3116 * - check that for a password change operation one add and one delete
3117 * operation exists
3118 * (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
3119 * - check that a password change and a password set operation cannot
3120 * be mixed
3121 * (if not return "UNWILLING_TO_PERFORM")
3122 * - remove all password attributes modifications from the first change
3123 * operation (anything without the passwords) - we will make the real
3124 * modification later */
3125 del_attr_cnt = 0;
3126 add_attr_cnt = 0;
3127 rep_attr_cnt = 0;
3128 for (l = passwordAttrs; *l != NULL; l++) {
3129 if ((!ac->userPassword) &&
3130 (ldb_attr_cmp(*l, "userPassword") == 0)) {
3131 continue;
3132 }
3133
3134 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
3135 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
3136 ++del_attr_cnt;
3137 }
3138 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
3139 ++add_attr_cnt;
3140 }
3141 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
3142 ++rep_attr_cnt;
3143 }
3144 if ((passwordAttr->num_values != 1) &&
3145 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
3146 talloc_free(ac);
3147 ldb_asprintf_errstring(ldb,
3148 "'%s' attribute must have exactly one value on add operations!",
3149 *l);
3150 return LDB_ERR_CONSTRAINT_VIOLATION;
3151 }
3152 if ((passwordAttr->num_values > 1) &&
3153 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
3154 talloc_free(ac);
3155 ldb_asprintf_errstring(ldb,
3156 "'%s' attribute must have zero or one value(s) on delete operations!",
3157 *l);
3158 return LDB_ERR_CONSTRAINT_VIOLATION;
3159 }
3160 ldb_msg_remove_element(msg, passwordAttr);
3161 }
3162 }
3163 if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
3164 talloc_free(ac);
3165 ldb_set_errstring(ldb,
3166 "Only the add action for a password change specified!");
3167 return LDB_ERR_UNWILLING_TO_PERFORM;
3168 }
3169 if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
3170 talloc_free(ac);
3171 ldb_set_errstring(ldb,
3172 "Only one delete and one add action for a password change allowed!");
3173 return LDB_ERR_UNWILLING_TO_PERFORM;
3174 }
3175 if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
3176 talloc_free(ac);
3177 ldb_set_errstring(ldb,
3178 "Either a password change or a password set operation is allowed!");
3179 return LDB_ERR_UNWILLING_TO_PERFORM;
3180 }
3181
3182 /* if there was nothing else to be modified skip to next step */
3183 if (msg->num_elements == 0) {
3184 return password_hash_mod_search_self(ac);
3185 }
3186
3187 ret = ldb_build_mod_req(&down_req, ldb, ac,
3188 msg,
3189 req->controls,
3190 ac, ph_modify_callback,
3191 req);
3192 LDB_REQ_SET_LOCATION(down_req);
3193 if (ret != LDB_SUCCESS) {
3194 return ret;
3195 }
3196
3197 return ldb_next_request(module, down_req);
3198 }
3199
3200 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3201 {
3202 struct ph_context *ac;
3203
3204 ac = talloc_get_type(req->context, struct ph_context);
3205
3206 if (!ares) {
3207 return ldb_module_done(ac->req, NULL, NULL,
3208 LDB_ERR_OPERATIONS_ERROR);
3209 }
3210
3211 if (ares->type == LDB_REPLY_REFERRAL) {
3212 return ldb_module_send_referral(ac->req, ares->referral);
3213 }
3214
3215 if (ares->error != LDB_SUCCESS) {
3216 return ldb_module_done(ac->req, ares->controls,
3217 ares->response, ares->error);
3218 }
3219
3220 if (ares->type != LDB_REPLY_DONE) {
3221 talloc_free(ares);
3222 return ldb_module_done(ac->req, NULL, NULL,
3223 LDB_ERR_OPERATIONS_ERROR);
3224 }
3225
3226 talloc_free(ares);
3227
3228 return password_hash_mod_search_self(ac);
3229 }
3230
3231 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
3232 {
3233 struct ldb_context *ldb;
3234 struct ph_context *ac;
3235 int ret = LDB_SUCCESS;
3236
3237 ac = talloc_get_type(req->context, struct ph_context);
3238 ldb = ldb_module_get_ctx(ac->module);
3239
3240 if (!ares) {
3241 ret = LDB_ERR_OPERATIONS_ERROR;
3242 goto done;
3243 }
3244 if (ares->error != LDB_SUCCESS) {
3245 return ldb_module_done(ac->req, ares->controls,
3246 ares->response, ares->error);
3247 }
3248
3249 /* we are interested only in the single reply (base search) */
3250 switch (ares->type) {
3251 case LDB_REPLY_ENTRY:
3252 /* Make sure we are performing the password change action on a
3253 * (for us) valid object. Those are instances of either "user"
3254 * and/or "inetOrgPerson". Otherwise continue with the
3255 * submodules. */
3256 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
3257 && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
3258 talloc_free(ares);
3259
3260 if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
3261 ldb_set_errstring(ldb,
3262 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
3263 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
3264 goto done;
3265 }
3266
3267 ret = ldb_next_request(ac->module, ac->req);
3268 goto done;
3269 }
3270
3271 if (ac->search_res != NULL) {
3272 talloc_free(ares);
3273
3274 ldb_set_errstring(ldb, "Too many results");
3275 ret = LDB_ERR_OPERATIONS_ERROR;
3276 goto done;
3277 }
3278
3279 ac->search_res = talloc_steal(ac, ares);
3280 ret = LDB_SUCCESS;
3281 break;
3282
3283 case LDB_REPLY_REFERRAL:
3284 /* ignore anything else for now */
3285 talloc_free(ares);
3286 ret = LDB_SUCCESS;
3287 break;
3288
3289 case LDB_REPLY_DONE:
3290 talloc_free(ares);
3291
3292 /* get user domain data */
3293 ret = build_domain_data_request(ac);
3294 if (ret != LDB_SUCCESS) {
3295 return ldb_module_done(ac->req, NULL, NULL, ret);
3296 }
3297
3298 ret = ldb_next_request(ac->module, ac->dom_req);
3299 break;
3300 }
3301
3302 done:
3303 if (ret != LDB_SUCCESS) {
3304 return ldb_module_done(ac->req, NULL, NULL, ret);
3305 }
3306
3307 return LDB_SUCCESS;
3308 }
3309
3310 static int password_hash_mod_search_self(struct ph_context *ac)
3311 {
3312 struct ldb_context *ldb;
3313 static const char * const attrs[] = { "objectClass",
3314 "userAccountControl",
3315 "msDS-User-Account-Control-Computed",
3316 "pwdLastSet",
3317 "sAMAccountName",
3318 "objectSid",
3319 "userPrincipalName",
3320 "supplementalCredentials",
3321 "lmPwdHistory",
3322 "ntPwdHistory",
3323 "dBCSPwd",
3324 "unicodePwd",
3325 "badPasswordTime",
3326 "badPwdCount",
3327 "lockoutTime",
3328 NULL };
3329 struct ldb_request *search_req;
3330 int ret;
3331
3332 ldb = ldb_module_get_ctx(ac->module);
3333
3334 ret = ldb_build_search_req(&search_req, ldb, ac,
3335 ac->req->op.mod.message->dn,
3336 LDB_SCOPE_BASE,
3337 "(objectclass=*)",
3338 attrs,
3339 NULL,
3340 ac, ph_mod_search_callback,
3341 ac->req);
3342 LDB_REQ_SET_LOCATION(search_req);
3343 if (ret != LDB_SUCCESS) {
3344 return ret;
3345 }
3346
3347 return ldb_next_request(ac->module, search_req);
3348 }
3349
3350 static int password_hash_mod_do_mod(struct ph_context *ac)
3351 {
3352 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3353 struct loadparm_context *lp_ctx =
3354 talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
3355 struct loadparm_context);
3356 struct ldb_request *mod_req;
3357 struct ldb_message *msg;
3358 const struct ldb_message *orig_msg, *searched_msg;
3359 struct setup_password_fields_io io;
3360 int ret;
3361 NTSTATUS status;
3362
3363 /* use a new message structure so that we can modify it */
3364 msg = ldb_msg_new(ac);
3365 if (msg == NULL) {
3366 return ldb_operr(ldb);
3367 }
3368
3369 /* modify dn */
3370 msg->dn = ac->req->op.mod.message->dn;
3371
3372 orig_msg = ac->req->op.mod.message;
3373 searched_msg = ac->search_res->message;
3374
3375 /* Prepare the internal data structure containing the passwords */
3376 ret = setup_io(ac, orig_msg, searched_msg, &io);
3377 if (ret != LDB_SUCCESS) {
3378 return ret;
3379 }
3380
3381 if (io.ac->pwd_reset) {
3382 /* Get the old password from the database */
3383 status = samdb_result_passwords_no_lockout(io.ac,
3384 lp_ctx,
3385 discard_const_p(struct ldb_message, searched_msg),
3386 &io.o.lm_hash,
3387 &io.o.nt_hash);
3388 } else {
3389 /* Get the old password from the database */
3390 status = samdb_result_passwords(io.ac,
3391 lp_ctx,
3392 discard_const_p(struct ldb_message, searched_msg),
3393 &io.o.lm_hash, &io.o.nt_hash);
3394 }
3395
3396 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
3397 ldb_asprintf_errstring(ldb,
3398 "%08X: check_password: "
3399 "Password change not permitted, account locked out!",
3400 W_ERROR_V(WERR_ACCOUNT_LOCKED_OUT));
3401 return LDB_ERR_CONSTRAINT_VIOLATION;
3402 }
3403
3404 if (!NT_STATUS_IS_OK(status)) {
3405 /*
3406 * This only happens if the database has gone weird,
3407 * not if we are just missing the passwords
3408 */
3409 return ldb_operr(ldb);
3410 }
3411
3412 io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
3413 io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
3414 io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
3415
3416 ret = setup_password_fields(&io);
3417 if (ret != LDB_SUCCESS) {
3418 return ret;
3419 }
3420
3421 ret = check_password_restrictions(&io);
3422 if (ret != LDB_SUCCESS) {
3423 return ret;
3424 }
3425
3426 /* make sure we replace all the old attributes */
3427 ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
3428 ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
3429 ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3430 ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3431 ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
3432 ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
3433
3434 if (io.g.nt_hash) {
3435 ret = samdb_msg_add_hash(ldb, ac, msg,
3436 "unicodePwd", io.g.nt_hash);
3437 if (ret != LDB_SUCCESS) {
3438 return ret;
3439 }
3440 }
3441 if (io.g.lm_hash) {
3442 ret = samdb_msg_add_hash(ldb, ac, msg,
3443 "dBCSPwd", io.g.lm_hash);
3444 if (ret != LDB_SUCCESS) {
3445 return ret;
3446 }
3447 }
3448 if (io.g.nt_history_len > 0) {
3449 ret = samdb_msg_add_hashes(ldb, ac, msg,
3450 "ntPwdHistory",
3451 io.g.nt_history,
3452 io.g.nt_history_len);
3453 if (ret != LDB_SUCCESS) {
3454 return ret;
3455 }
3456 }
3457 if (io.g.lm_history_len > 0) {
3458 ret = samdb_msg_add_hashes(ldb, ac, msg,
3459 "lmPwdHistory",
3460 io.g.lm_history,
3461 io.g.lm_history_len);
3462 if (ret != LDB_SUCCESS) {
3463 return ret;
3464 }
3465 }
3466 if (io.g.supplemental.length > 0) {
3467 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3468 &io.g.supplemental, NULL);
3469 if (ret != LDB_SUCCESS) {
3470 return ret;
3471 }
3472 }
3473 ret = samdb_msg_add_uint64(ldb, ac, msg,
3474 "pwdLastSet",
3475 io.g.last_set);
3476 if (ret != LDB_SUCCESS) {
3477 return ret;
3478 }
3479
3480 ret = ldb_build_mod_req(&mod_req, ldb, ac,
3481 msg,
3482 ac->req->controls,
3483 ac, ph_op_callback,
3484 ac->req);
3485 LDB_REQ_SET_LOCATION(mod_req);
3486 if (ret != LDB_SUCCESS) {
3487 return ret;
3488 }
3489
3490 return ldb_next_request(ac->module, mod_req);
3491 }
3492
3493 static const struct ldb_module_ops ldb_password_hash_module_ops = {
3494 .name = "password_hash",
3495 .add = password_hash_add,
3496 .modify = password_hash_modify
3497 };
3498
3499 int ldb_password_hash_module_init(const char *version)
3500 {
3501 LDB_MODULE_CHECK_VERSION(version);
3502 return ldb_register_module(&ldb_password_hash_module_ops);
3503 }
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