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s4:dsdb/password_hash: Honor password complexity settings.
[Samba/vl.git] / source4 / dsdb / samdb / ldb_modules / password_hash.c
blob0f8920c433399f0d9d68134b2961953fc3c16418
1 /*
2 ldb database module
3
4 Copyright (C) Simo Sorce 2004-2008
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
6 Copyright (C) Andrew Tridgell 2004
7 Copyright (C) Stefan Metzmacher 2007-2010
8 Copyright (C) Matthias Dieter Wallnöfer 2009-2010
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 /*
25 * Name: ldb
26 *
27 * Component: ldb password_hash module
28 *
29 * Description: correctly handle AD password changes fields
30 *
31 * Author: Andrew Bartlett
32 * Author: Stefan Metzmacher
33 */
34
35 #include "includes.h"
36 #include "ldb_module.h"
37 #include "libcli/auth/libcli_auth.h"
38 #include "system/kerberos.h"
39 #include "auth/kerberos/kerberos.h"
40 #include "dsdb/samdb/samdb.h"
41 #include "dsdb/samdb/ldb_modules/util.h"
42 #include "dsdb/samdb/ldb_modules/password_modules.h"
43 #include "librpc/gen_ndr/ndr_drsblobs.h"
44 #include "../lib/crypto/crypto.h"
45 #include "param/param.h"
46
47 /* If we have decided there is a reason to work on this request, then
48 * setup all the password hash types correctly.
49 *
50 * If we haven't the hashes yet but the password given as plain-text (attributes
51 * 'unicodePwd', 'userPassword' and 'clearTextPassword') we have to check for
52 * the constraints. Once this is done, we calculate the password hashes.
53 *
54 * Notice: unlike the real AD which only supports the UTF16 special based
55 * 'unicodePwd' and the UTF8 based 'userPassword' plaintext attribute we
56 * understand also a UTF16 based 'clearTextPassword' one.
57 * The latter is also accessible through LDAP so it can also be set by external
58 * tools and scripts. But be aware that this isn't portable on non SAMBA 4 ADs!
59 *
60 * Also when the module receives only the password hashes (possible through
61 * specifying an internal LDB control - for security reasons) some checks are
62 * performed depending on the operation mode (see below) (e.g. if the password
63 * has been in use before if the password memory policy was activated).
64 *
65 * Attention: There is a difference between "modify" and "reset" operations
66 * (see MS-ADTS 3.1.1.3.1.5). If the client sends a "add" and "remove"
67 * operation for a password attribute we thread this as a "modify"; if it sends
68 * only a "replace" one we have an (administrative) reset.
69 *
70 * Finally, if the administrator has requested that a password history
71 * be maintained, then this should also be written out.
72 *
73 */
74
75 /* TODO: [consider always MS-ADTS 3.1.1.3.1.5]
76 * - Check for right connection encryption
77 */
78
79 /* Notice: Definition of "dsdb_control_password_change_status" moved into
80 * "samdb.h" */
81
82 struct ph_context {
83 struct ldb_module *module;
84 struct ldb_request *req;
85
86 struct ldb_request *dom_req;
87 struct ldb_reply *dom_res;
88
89 struct ldb_reply *search_res;
90
91 struct dsdb_control_password_change_status *status;
92 struct dsdb_control_password_change *change;
93
94 bool pwd_reset;
95 bool change_status;
96 bool hash_values;
97 bool userPassword;
98 bool pwd_last_set_bypass;
99 };
100
101
102 struct setup_password_fields_io {
103 struct ph_context *ac;
104
105 struct smb_krb5_context *smb_krb5_context;
106
107 /* infos about the user account */
108 struct {
109 uint32_t userAccountControl;
110 NTTIME pwdLastSet;
111 const char *sAMAccountName;
112 const char *user_principal_name;
113 bool is_computer;
114 uint32_t restrictions;
115 } u;
116
117 /* new credentials and old given credentials */
118 struct setup_password_fields_given {
119 const struct ldb_val *cleartext_utf8;
120 const struct ldb_val *cleartext_utf16;
121 struct samr_Password *nt_hash;
122 struct samr_Password *lm_hash;
123 } n, og;
124
125 /* old credentials */
126 struct {
127 struct samr_Password *nt_hash;
128 struct samr_Password *lm_hash;
129 uint32_t nt_history_len;
130 struct samr_Password *nt_history;
131 uint32_t lm_history_len;
132 struct samr_Password *lm_history;
133 const struct ldb_val *supplemental;
134 struct supplementalCredentialsBlob scb;
135 } o;
136
137 /* generated credentials */
138 struct {
139 struct samr_Password *nt_hash;
140 struct samr_Password *lm_hash;
141 uint32_t nt_history_len;
142 struct samr_Password *nt_history;
143 uint32_t lm_history_len;
144 struct samr_Password *lm_history;
145 const char *salt;
146 DATA_BLOB aes_256;
147 DATA_BLOB aes_128;
148 DATA_BLOB des_md5;
149 DATA_BLOB des_crc;
150 struct ldb_val supplemental;
151 NTTIME last_set;
152 } g;
153 };
154
155 static int password_hash_bypass(struct ldb_module *module, struct ldb_request *request)
156 {
157 struct ldb_context *ldb = ldb_module_get_ctx(module);
158 const struct ldb_message *msg;
159 struct ldb_message_element *nte;
160 struct ldb_message_element *lme;
161 struct ldb_message_element *nthe;
162 struct ldb_message_element *lmhe;
163 struct ldb_message_element *sce;
164
165 switch (request->operation) {
166 case LDB_ADD:
167 msg = request->op.add.message;
168 break;
169 case LDB_MODIFY:
170 msg = request->op.mod.message;
171 break;
172 default:
173 return ldb_next_request(module, request);
174 }
175
176 /* nobody must touch password histories and 'supplementalCredentials' */
177 nte = dsdb_get_single_valued_attr(msg, "unicodePwd",
178 request->operation);
179 lme = dsdb_get_single_valued_attr(msg, "dBCSPwd",
180 request->operation);
181 nthe = dsdb_get_single_valued_attr(msg, "ntPwdHistory",
182 request->operation);
183 lmhe = dsdb_get_single_valued_attr(msg, "lmPwdHistory",
184 request->operation);
185 sce = dsdb_get_single_valued_attr(msg, "supplementalCredentials",
186 request->operation);
187
188 #define CHECK_HASH_ELEMENT(e, min, max) do {\
189 if (e && e->num_values) { \
190 unsigned int _count; \
191 if (e->num_values != 1) { \
192 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
193 "num_values != 1"); \
194 } \
195 if ((e->values[0].length % 16) != 0) { \
196 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
197 "length % 16 != 0"); \
198 } \
199 _count = e->values[0].length / 16; \
200 if (_count < min) { \
201 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
202 "count < min"); \
203 } \
204 if (_count > max) { \
205 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
206 "count > max"); \
207 } \
208 } \
209 } while (0)
210
211 CHECK_HASH_ELEMENT(nte, 1, 1);
212 CHECK_HASH_ELEMENT(lme, 1, 1);
213 CHECK_HASH_ELEMENT(nthe, 1, INT32_MAX);
214 CHECK_HASH_ELEMENT(lmhe, 1, INT32_MAX);
215
216 if (sce && sce->num_values) {
217 enum ndr_err_code ndr_err;
218 struct supplementalCredentialsBlob *scb;
219 struct supplementalCredentialsPackage *scpp = NULL;
220 struct supplementalCredentialsPackage *scpk = NULL;
221 struct supplementalCredentialsPackage *scpkn = NULL;
222 struct supplementalCredentialsPackage *scpct = NULL;
223 DATA_BLOB scpbp = data_blob_null;
224 DATA_BLOB scpbk = data_blob_null;
225 DATA_BLOB scpbkn = data_blob_null;
226 DATA_BLOB scpbct = data_blob_null;
227 DATA_BLOB blob;
228 uint32_t i;
229
230 if (sce->num_values != 1) {
231 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
232 "num_values != 1");
233 }
234
235 scb = talloc_zero(request, struct supplementalCredentialsBlob);
236 if (!scb) {
237 return ldb_module_oom(module);
238 }
239
240 ndr_err = ndr_pull_struct_blob_all(&sce->values[0], scb, scb,
241 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
242 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
243 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
244 "ndr_pull_struct_blob_all");
245 }
246
247 if (scb->sub.num_packages < 2) {
248 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
249 "num_packages < 2");
250 }
251
252 for (i=0; i < scb->sub.num_packages; i++) {
253 DATA_BLOB subblob;
254
255 subblob = strhex_to_data_blob(scb, scb->sub.packages[i].data);
256 if (subblob.data == NULL) {
257 return ldb_module_oom(module);
258 }
259
260 if (strcmp(scb->sub.packages[i].name, "Packages") == 0) {
261 if (scpp) {
262 return ldb_error(ldb,
263 LDB_ERR_CONSTRAINT_VIOLATION,
264 "Packages twice");
265 }
266 scpp = &scb->sub.packages[i];
267 scpbp = subblob;
268 continue;
269 }
270 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos") == 0) {
271 if (scpk) {
272 return ldb_error(ldb,
273 LDB_ERR_CONSTRAINT_VIOLATION,
274 "Primary:Kerberos twice");
275 }
276 scpk = &scb->sub.packages[i];
277 scpbk = subblob;
278 continue;
279 }
280 if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos-Newer-Keys") == 0) {
281 if (scpkn) {
282 return ldb_error(ldb,
283 LDB_ERR_CONSTRAINT_VIOLATION,
284 "Primary:Kerberos-Newer-Keys twice");
285 }
286 scpkn = &scb->sub.packages[i];
287 scpbkn = subblob;
288 continue;
289 }
290 if (strcmp(scb->sub.packages[i].name, "Primary:CLEARTEXT") == 0) {
291 if (scpct) {
292 return ldb_error(ldb,
293 LDB_ERR_CONSTRAINT_VIOLATION,
294 "Primary:CLEARTEXT twice");
295 }
296 scpct = &scb->sub.packages[i];
297 scpbct = subblob;
298 continue;
299 }
300
301 data_blob_free(&subblob);
302 }
303
304 if (scpp == NULL) {
305 return ldb_error(ldb,
306 LDB_ERR_CONSTRAINT_VIOLATION,
307 "Primary:Packages missing");
308 }
309
310 if (scpk == NULL) {
311 /*
312 * If Primary:Kerberos is missing w2k8r2 reboots
313 * when a password is changed.
314 */
315 return ldb_error(ldb,
316 LDB_ERR_CONSTRAINT_VIOLATION,
317 "Primary:Kerberos missing");
318 }
319
320 if (scpp) {
321 struct package_PackagesBlob *p;
322 uint32_t n;
323
324 p = talloc_zero(scb, struct package_PackagesBlob);
325 if (p == NULL) {
326 return ldb_module_oom(module);
327 }
328
329 ndr_err = ndr_pull_struct_blob(&scpbp, p, p,
330 (ndr_pull_flags_fn_t)ndr_pull_package_PackagesBlob);
331 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
332 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
333 "ndr_pull_struct_blob Packages");
334 }
335
336 if (p->names == NULL) {
337 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
338 "Packages names == NULL");
339 }
340
341 for (n = 0; p->names[n]; n++) {
342 /* noop */
343 }
344
345 if (scb->sub.num_packages != (n + 1)) {
346 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
347 "Packages num_packages != num_names + 1");
348 }
349
350 talloc_free(p);
351 }
352
353 if (scpk) {
354 struct package_PrimaryKerberosBlob *k;
355
356 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
357 if (k == NULL) {
358 return ldb_module_oom(module);
359 }
360
361 ndr_err = ndr_pull_struct_blob(&scpbk, k, k,
362 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
363 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
364 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
365 "ndr_pull_struct_blob PrimaryKerberos");
366 }
367
368 if (k->version != 3) {
369 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
370 "PrimaryKerberos version != 3");
371 }
372
373 if (k->ctr.ctr3.salt.string == NULL) {
374 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
375 "PrimaryKerberos salt == NULL");
376 }
377
378 if (strlen(k->ctr.ctr3.salt.string) == 0) {
379 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
380 "PrimaryKerberos strlen(salt) == 0");
381 }
382
383 if (k->ctr.ctr3.num_keys != 2) {
384 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
385 "PrimaryKerberos num_keys != 2");
386 }
387
388 if (k->ctr.ctr3.num_old_keys > k->ctr.ctr3.num_keys) {
389 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
390 "PrimaryKerberos num_old_keys > num_keys");
391 }
392
393 if (k->ctr.ctr3.keys[0].keytype != ENCTYPE_DES_CBC_MD5) {
394 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
395 "PrimaryKerberos key[0] != DES_CBC_MD5");
396 }
397 if (k->ctr.ctr3.keys[1].keytype != ENCTYPE_DES_CBC_CRC) {
398 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
399 "PrimaryKerberos key[1] != DES_CBC_CRC");
400 }
401
402 if (k->ctr.ctr3.keys[0].value_len != 8) {
403 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
404 "PrimaryKerberos key[0] value_len != 8");
405 }
406 if (k->ctr.ctr3.keys[1].value_len != 8) {
407 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
408 "PrimaryKerberos key[1] value_len != 8");
409 }
410
411 for (i = 0; i < k->ctr.ctr3.num_old_keys; i++) {
412 if (k->ctr.ctr3.old_keys[i].keytype ==
413 k->ctr.ctr3.keys[i].keytype &&
414 k->ctr.ctr3.old_keys[i].value_len ==
415 k->ctr.ctr3.keys[i].value_len) {
416 continue;
417 }
418
419 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
420 "PrimaryKerberos old_keys type/value_len doesn't match");
421 }
422
423 talloc_free(k);
424 }
425
426 if (scpkn) {
427 struct package_PrimaryKerberosBlob *k;
428
429 k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
430 if (k == NULL) {
431 return ldb_module_oom(module);
432 }
433
434 ndr_err = ndr_pull_struct_blob(&scpbkn, k, k,
435 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
436 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
437 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
438 "ndr_pull_struct_blob PrimaryKerberosNeverKeys");
439 }
440
441 if (k->version != 4) {
442 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
443 "KerberosNerverKeys version != 4");
444 }
445
446 if (k->ctr.ctr4.salt.string == NULL) {
447 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
448 "KerberosNewerKeys salt == NULL");
449 }
450
451 if (strlen(k->ctr.ctr4.salt.string) == 0) {
452 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
453 "KerberosNewerKeys strlen(salt) == 0");
454 }
455
456 if (k->ctr.ctr4.num_keys != 4) {
457 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
458 "KerberosNewerKeys num_keys != 2");
459 }
460
461 if (k->ctr.ctr4.num_old_keys > k->ctr.ctr4.num_keys) {
462 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
463 "KerberosNewerKeys num_old_keys > num_keys");
464 }
465
466 if (k->ctr.ctr4.num_older_keys > k->ctr.ctr4.num_old_keys) {
467 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
468 "KerberosNewerKeys num_older_keys > num_old_keys");
469 }
470
471 if (k->ctr.ctr4.keys[0].keytype != ENCTYPE_AES256_CTS_HMAC_SHA1_96) {
472 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
473 "KerberosNewerKeys key[0] != AES256");
474 }
475 if (k->ctr.ctr4.keys[1].keytype != ENCTYPE_AES128_CTS_HMAC_SHA1_96) {
476 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
477 "KerberosNewerKeys key[1] != AES128");
478 }
479 if (k->ctr.ctr4.keys[2].keytype != ENCTYPE_DES_CBC_MD5) {
480 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
481 "KerberosNewerKeys key[2] != DES_CBC_MD5");
482 }
483 if (k->ctr.ctr4.keys[3].keytype != ENCTYPE_DES_CBC_CRC) {
484 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
485 "KerberosNewerKeys key[3] != DES_CBC_CRC");
486 }
487
488 if (k->ctr.ctr4.keys[0].value_len != 32) {
489 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
490 "KerberosNewerKeys key[0] value_len != 32");
491 }
492 if (k->ctr.ctr4.keys[1].value_len != 16) {
493 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
494 "KerberosNewerKeys key[1] value_len != 16");
495 }
496 if (k->ctr.ctr4.keys[2].value_len != 8) {
497 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
498 "KerberosNewerKeys key[2] value_len != 8");
499 }
500 if (k->ctr.ctr4.keys[3].value_len != 8) {
501 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
502 "KerberosNewerKeys key[3] value_len != 8");
503 }
504
505 /*
506 * TODO:
507 * Maybe we can check old and older keys here.
508 * But we need to do some tests, if the old keys
509 * can be taken from the PrimaryKerberos blob
510 * (with only des keys), when the domain was upgraded
511 * from w2k3 to w2k8.
512 */
513
514 talloc_free(k);
515 }
516
517 if (scpct) {
518 struct package_PrimaryCLEARTEXTBlob *ct;
519
520 ct = talloc_zero(scb, struct package_PrimaryCLEARTEXTBlob);
521 if (ct == NULL) {
522 return ldb_module_oom(module);
523 }
524
525 ndr_err = ndr_pull_struct_blob(&scpbct, ct, ct,
526 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryCLEARTEXTBlob);
527 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
528 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
529 "ndr_pull_struct_blob PrimaryCLEARTEXT");
530 }
531
532 if ((ct->cleartext.length % 2) != 0) {
533 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
534 "PrimaryCLEARTEXT length % 2 != 0");
535 }
536
537 talloc_free(ct);
538 }
539
540 ndr_err = ndr_push_struct_blob(&blob, scb, scb,
541 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
542 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
543 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
544 "ndr_pull_struct_blob_all");
545 }
546
547 if (sce->values[0].length != blob.length) {
548 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
549 "supplementalCredentialsBlob length differ");
550 }
551
552 if (memcmp(sce->values[0].data, blob.data, blob.length) != 0) {
553 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
554 "supplementalCredentialsBlob memcmp differ");
555 }
556
557 talloc_free(scb);
558 }
559
560 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_bypass - validated\n");
561 return ldb_next_request(module, request);
562 }
563
564 /* Get the NT hash, and fill it in as an entry in the password history,
565 and specify it into io->g.nt_hash */
566
567 static int setup_nt_fields(struct setup_password_fields_io *io)
568 {
569 struct ldb_context *ldb;
570 uint32_t i;
571
572 io->g.nt_hash = io->n.nt_hash;
573 ldb = ldb_module_get_ctx(io->ac->module);
574
575 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
576 return LDB_SUCCESS;
577 }
578
579 /* We might not have an old NT password */
580 io->g.nt_history = talloc_array(io->ac,
581 struct samr_Password,
582 io->ac->status->domain_data.pwdHistoryLength);
583 if (!io->g.nt_history) {
584 return ldb_oom(ldb);
585 }
586
587 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
588 io->o.nt_history_len); i++) {
589 io->g.nt_history[i+1] = io->o.nt_history[i];
590 }
591 io->g.nt_history_len = i + 1;
592
593 if (io->g.nt_hash) {
594 io->g.nt_history[0] = *io->g.nt_hash;
595 } else {
596 /*
597 * TODO: is this correct?
598 * the simular behavior is correct for the lm history case
599 */
600 E_md4hash("", io->g.nt_history[0].hash);
601 }
602
603 return LDB_SUCCESS;
604 }
605
606 /* Get the LANMAN hash, and fill it in as an entry in the password history,
607 and specify it into io->g.lm_hash */
608
609 static int setup_lm_fields(struct setup_password_fields_io *io)
610 {
611 struct ldb_context *ldb;
612 uint32_t i;
613
614 io->g.lm_hash = io->n.lm_hash;
615 ldb = ldb_module_get_ctx(io->ac->module);
616
617 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
618 return LDB_SUCCESS;
619 }
620
621 /* We might not have an old LM password */
622 io->g.lm_history = talloc_array(io->ac,
623 struct samr_Password,
624 io->ac->status->domain_data.pwdHistoryLength);
625 if (!io->g.lm_history) {
626 return ldb_oom(ldb);
627 }
628
629 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
630 io->o.lm_history_len); i++) {
631 io->g.lm_history[i+1] = io->o.lm_history[i];
632 }
633 io->g.lm_history_len = i + 1;
634
635 if (io->g.lm_hash) {
636 io->g.lm_history[0] = *io->g.lm_hash;
637 } else {
638 E_deshash("", io->g.lm_history[0].hash);
639 }
640
641 return LDB_SUCCESS;
642 }
643
644 static int setup_kerberos_keys(struct setup_password_fields_io *io)
645 {
646 struct ldb_context *ldb;
647 krb5_error_code krb5_ret;
648 Principal *salt_principal;
649 krb5_salt salt;
650 krb5_keyblock key;
651 krb5_data cleartext_data;
652
653 ldb = ldb_module_get_ctx(io->ac->module);
654 cleartext_data.data = io->n.cleartext_utf8->data;
655 cleartext_data.length = io->n.cleartext_utf8->length;
656
657 /* Many, many thanks to lukeh@padl.com for this
658 * algorithm, described in his Nov 10 2004 mail to
659 * samba-technical@samba.org */
660
661 /*
662 * Determine a salting principal
663 */
664 if (io->u.is_computer) {
665 char *name;
666 char *saltbody;
667
668 name = strlower_talloc(io->ac, io->u.sAMAccountName);
669 if (!name) {
670 return ldb_oom(ldb);
671 }
672
673 if (name[strlen(name)-1] == '$') {
674 name[strlen(name)-1] = '\0';
675 }
676
677 saltbody = talloc_asprintf(io->ac, "%s.%s", name,
678 io->ac->status->domain_data.dns_domain);
679 if (!saltbody) {
680 return ldb_oom(ldb);
681 }
682
683 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
684 &salt_principal,
685 io->ac->status->domain_data.realm,
686 "host", saltbody, NULL);
687 } else if (io->u.user_principal_name) {
688 char *user_principal_name;
689 char *p;
690
691 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
692 if (!user_principal_name) {
693 return ldb_oom(ldb);
694 }
695
696 p = strchr(user_principal_name, '@');
697 if (p) {
698 p[0] = '\0';
699 }
700
701 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
702 &salt_principal,
703 io->ac->status->domain_data.realm,
704 user_principal_name, NULL);
705 } else {
706 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
707 &salt_principal,
708 io->ac->status->domain_data.realm,
709 io->u.sAMAccountName, NULL);
710 }
711 if (krb5_ret) {
712 ldb_asprintf_errstring(ldb,
713 "setup_kerberos_keys: "
714 "generation of a salting principal failed: %s",
715 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
716 krb5_ret, io->ac));
717 return LDB_ERR_OPERATIONS_ERROR;
718 }
719
720 /*
721 * create salt from salt_principal
722 */
723 krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
724 salt_principal, &salt);
725 krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
726 if (krb5_ret) {
727 ldb_asprintf_errstring(ldb,
728 "setup_kerberos_keys: "
729 "generation of krb5_salt failed: %s",
730 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
731 krb5_ret, io->ac));
732 return LDB_ERR_OPERATIONS_ERROR;
733 }
734 /* create a talloc copy */
735 io->g.salt = talloc_strndup(io->ac,
736 (char *)salt.saltvalue.data,
737 salt.saltvalue.length);
738 krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
739 if (!io->g.salt) {
740 return ldb_oom(ldb);
741 }
742 salt.saltvalue.data = discard_const(io->g.salt);
743 salt.saltvalue.length = strlen(io->g.salt);
744
745 /*
746 * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
747 * the salt and the cleartext password
748 */
749 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
750 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
751 cleartext_data,
752 salt,
753 &key);
754 if (krb5_ret) {
755 ldb_asprintf_errstring(ldb,
756 "setup_kerberos_keys: "
757 "generation of a aes256-cts-hmac-sha1-96 key failed: %s",
758 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
759 krb5_ret, io->ac));
760 return LDB_ERR_OPERATIONS_ERROR;
761 }
762 io->g.aes_256 = data_blob_talloc(io->ac,
763 KRB5_KEY_DATA(&key),
764 KRB5_KEY_LENGTH(&key));
765 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
766 if (!io->g.aes_256.data) {
767 return ldb_oom(ldb);
768 }
769
770 /*
771 * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of
772 * the salt and the cleartext password
773 */
774 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
775 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
776 cleartext_data,
777 salt,
778 &key);
779 if (krb5_ret) {
780 ldb_asprintf_errstring(ldb,
781 "setup_kerberos_keys: "
782 "generation of a aes128-cts-hmac-sha1-96 key failed: %s",
783 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
784 krb5_ret, io->ac));
785 return LDB_ERR_OPERATIONS_ERROR;
786 }
787 io->g.aes_128 = data_blob_talloc(io->ac,
788 KRB5_KEY_DATA(&key),
789 KRB5_KEY_LENGTH(&key));
790 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
791 if (!io->g.aes_128.data) {
792 return ldb_oom(ldb);
793 }
794
795 /*
796 * create ENCTYPE_DES_CBC_MD5 key out of
797 * the salt and the cleartext password
798 */
799 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
800 ENCTYPE_DES_CBC_MD5,
801 cleartext_data,
802 salt,
803 &key);
804 if (krb5_ret) {
805 ldb_asprintf_errstring(ldb,
806 "setup_kerberos_keys: "
807 "generation of a des-cbc-md5 key failed: %s",
808 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
809 krb5_ret, io->ac));
810 return LDB_ERR_OPERATIONS_ERROR;
811 }
812 io->g.des_md5 = data_blob_talloc(io->ac,
813 KRB5_KEY_DATA(&key),
814 KRB5_KEY_LENGTH(&key));
815 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
816 if (!io->g.des_md5.data) {
817 return ldb_oom(ldb);
818 }
819
820 /*
821 * create ENCTYPE_DES_CBC_CRC key out of
822 * the salt and the cleartext password
823 */
824 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
825 ENCTYPE_DES_CBC_CRC,
826 cleartext_data,
827 salt,
828 &key);
829 if (krb5_ret) {
830 ldb_asprintf_errstring(ldb,
831 "setup_kerberos_keys: "
832 "generation of a des-cbc-crc key failed: %s",
833 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
834 krb5_ret, io->ac));
835 return LDB_ERR_OPERATIONS_ERROR;
836 }
837 io->g.des_crc = data_blob_talloc(io->ac,
838 KRB5_KEY_DATA(&key),
839 KRB5_KEY_LENGTH(&key));
840 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
841 if (!io->g.des_crc.data) {
842 return ldb_oom(ldb);
843 }
844
845 return LDB_SUCCESS;
846 }
847
848 static int setup_primary_kerberos(struct setup_password_fields_io *io,
849 const struct supplementalCredentialsBlob *old_scb,
850 struct package_PrimaryKerberosBlob *pkb)
851 {
852 struct ldb_context *ldb;
853 struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
854 struct supplementalCredentialsPackage *old_scp = NULL;
855 struct package_PrimaryKerberosBlob _old_pkb;
856 struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
857 uint32_t i;
858 enum ndr_err_code ndr_err;
859
860 ldb = ldb_module_get_ctx(io->ac->module);
861
862 /*
863 * prepare generation of keys
864 *
865 * ENCTYPE_DES_CBC_MD5
866 * ENCTYPE_DES_CBC_CRC
867 */
868 pkb->version = 3;
869 pkb3->salt.string = io->g.salt;
870 pkb3->num_keys = 2;
871 pkb3->keys = talloc_array(io->ac,
872 struct package_PrimaryKerberosKey3,
873 pkb3->num_keys);
874 if (!pkb3->keys) {
875 return ldb_oom(ldb);
876 }
877
878 pkb3->keys[0].keytype = ENCTYPE_DES_CBC_MD5;
879 pkb3->keys[0].value = &io->g.des_md5;
880 pkb3->keys[1].keytype = ENCTYPE_DES_CBC_CRC;
881 pkb3->keys[1].value = &io->g.des_crc;
882
883 /* initialize the old keys to zero */
884 pkb3->num_old_keys = 0;
885 pkb3->old_keys = NULL;
886
887 /* if there're no old keys, then we're done */
888 if (!old_scb) {
889 return LDB_SUCCESS;
890 }
891
892 for (i=0; i < old_scb->sub.num_packages; i++) {
893 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
894 continue;
895 }
896
897 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
898 continue;
899 }
900
901 old_scp = &old_scb->sub.packages[i];
902 break;
903 }
904 /* Primary:Kerberos element of supplementalCredentials */
905 if (old_scp) {
906 DATA_BLOB blob;
907
908 blob = strhex_to_data_blob(io->ac, old_scp->data);
909 if (!blob.data) {
910 return ldb_oom(ldb);
911 }
912
913 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
914 ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
915 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
916 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
917 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
918 ldb_asprintf_errstring(ldb,
919 "setup_primary_kerberos: "
920 "failed to pull old package_PrimaryKerberosBlob: %s",
921 nt_errstr(status));
922 return LDB_ERR_OPERATIONS_ERROR;
923 }
924
925 if (_old_pkb.version != 3) {
926 ldb_asprintf_errstring(ldb,
927 "setup_primary_kerberos: "
928 "package_PrimaryKerberosBlob version[%u] expected[3]",
929 _old_pkb.version);
930 return LDB_ERR_OPERATIONS_ERROR;
931 }
932
933 old_pkb3 = &_old_pkb.ctr.ctr3;
934 }
935
936 /* if we didn't found the old keys we're done */
937 if (!old_pkb3) {
938 return LDB_SUCCESS;
939 }
940
941 /* fill in the old keys */
942 pkb3->num_old_keys = old_pkb3->num_keys;
943 pkb3->old_keys = old_pkb3->keys;
944
945 return LDB_SUCCESS;
946 }
947
948 static int setup_primary_kerberos_newer(struct setup_password_fields_io *io,
949 const struct supplementalCredentialsBlob *old_scb,
950 struct package_PrimaryKerberosBlob *pkb)
951 {
952 struct ldb_context *ldb;
953 struct package_PrimaryKerberosCtr4 *pkb4 = &pkb->ctr.ctr4;
954 struct supplementalCredentialsPackage *old_scp = NULL;
955 struct package_PrimaryKerberosBlob _old_pkb;
956 struct package_PrimaryKerberosCtr4 *old_pkb4 = NULL;
957 uint32_t i;
958 enum ndr_err_code ndr_err;
959
960 ldb = ldb_module_get_ctx(io->ac->module);
961
962 /*
963 * prepare generation of keys
964 *
965 * ENCTYPE_AES256_CTS_HMAC_SHA1_96
966 * ENCTYPE_AES128_CTS_HMAC_SHA1_96
967 * ENCTYPE_DES_CBC_MD5
968 * ENCTYPE_DES_CBC_CRC
969 */
970 pkb->version = 4;
971 pkb4->salt.string = io->g.salt;
972 pkb4->default_iteration_count = 4096;
973 pkb4->num_keys = 4;
974
975 pkb4->keys = talloc_array(io->ac,
976 struct package_PrimaryKerberosKey4,
977 pkb4->num_keys);
978 if (!pkb4->keys) {
979 return ldb_oom(ldb);
980 }
981
982 pkb4->keys[0].iteration_count = 4096;
983 pkb4->keys[0].keytype = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
984 pkb4->keys[0].value = &io->g.aes_256;
985 pkb4->keys[1].iteration_count = 4096;
986 pkb4->keys[1].keytype = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
987 pkb4->keys[1].value = &io->g.aes_128;
988 pkb4->keys[2].iteration_count = 4096;
989 pkb4->keys[2].keytype = ENCTYPE_DES_CBC_MD5;
990 pkb4->keys[2].value = &io->g.des_md5;
991 pkb4->keys[3].iteration_count = 4096;
992 pkb4->keys[3].keytype = ENCTYPE_DES_CBC_CRC;
993 pkb4->keys[3].value = &io->g.des_crc;
994
995 /* initialize the old keys to zero */
996 pkb4->num_old_keys = 0;
997 pkb4->old_keys = NULL;
998 pkb4->num_older_keys = 0;
999 pkb4->older_keys = NULL;
1000
1001 /* if there're no old keys, then we're done */
1002 if (!old_scb) {
1003 return LDB_SUCCESS;
1004 }
1005
1006 for (i=0; i < old_scb->sub.num_packages; i++) {
1007 if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) {
1008 continue;
1009 }
1010
1011 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
1012 continue;
1013 }
1014
1015 old_scp = &old_scb->sub.packages[i];
1016 break;
1017 }
1018 /* Primary:Kerberos-Newer-Keys element of supplementalCredentials */
1019 if (old_scp) {
1020 DATA_BLOB blob;
1021
1022 blob = strhex_to_data_blob(io->ac, old_scp->data);
1023 if (!blob.data) {
1024 return ldb_oom(ldb);
1025 }
1026
1027 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
1028 ndr_err = ndr_pull_struct_blob(&blob, io->ac,
1029 &_old_pkb,
1030 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
1031 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1032 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1033 ldb_asprintf_errstring(ldb,
1034 "setup_primary_kerberos_newer: "
1035 "failed to pull old package_PrimaryKerberosBlob: %s",
1036 nt_errstr(status));
1037 return LDB_ERR_OPERATIONS_ERROR;
1038 }
1039
1040 if (_old_pkb.version != 4) {
1041 ldb_asprintf_errstring(ldb,
1042 "setup_primary_kerberos_newer: "
1043 "package_PrimaryKerberosBlob version[%u] expected[4]",
1044 _old_pkb.version);
1045 return LDB_ERR_OPERATIONS_ERROR;
1046 }
1047
1048 old_pkb4 = &_old_pkb.ctr.ctr4;
1049 }
1050
1051 /* if we didn't found the old keys we're done */
1052 if (!old_pkb4) {
1053 return LDB_SUCCESS;
1054 }
1055
1056 /* fill in the old keys */
1057 pkb4->num_old_keys = old_pkb4->num_keys;
1058 pkb4->old_keys = old_pkb4->keys;
1059 pkb4->num_older_keys = old_pkb4->num_old_keys;
1060 pkb4->older_keys = old_pkb4->old_keys;
1061
1062 return LDB_SUCCESS;
1063 }
1064
1065 static int setup_primary_wdigest(struct setup_password_fields_io *io,
1066 const struct supplementalCredentialsBlob *old_scb,
1067 struct package_PrimaryWDigestBlob *pdb)
1068 {
1069 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1070 DATA_BLOB sAMAccountName;
1071 DATA_BLOB sAMAccountName_l;
1072 DATA_BLOB sAMAccountName_u;
1073 const char *user_principal_name = io->u.user_principal_name;
1074 DATA_BLOB userPrincipalName;
1075 DATA_BLOB userPrincipalName_l;
1076 DATA_BLOB userPrincipalName_u;
1077 DATA_BLOB netbios_domain;
1078 DATA_BLOB netbios_domain_l;
1079 DATA_BLOB netbios_domain_u;
1080 DATA_BLOB dns_domain;
1081 DATA_BLOB dns_domain_l;
1082 DATA_BLOB dns_domain_u;
1083 DATA_BLOB digest;
1084 DATA_BLOB delim;
1085 DATA_BLOB backslash;
1086 uint8_t i;
1087 struct {
1088 DATA_BLOB *user;
1089 DATA_BLOB *realm;
1090 DATA_BLOB *nt4dom;
1091 } wdigest[] = {
1092 /*
1093 * See
1094 * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
1095 * for what precalculated hashes are supposed to be stored...
1096 *
1097 * I can't reproduce all values which should contain "Digest" as realm,
1098 * am I doing something wrong or is w2k3 just broken...?
1099 *
1100 * W2K3 fills in following for a user:
1101 *
1102 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1103 * sAMAccountName: NewUser2Sam
1104 * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
1105 *
1106 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1107 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1108 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1109 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1110 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1111 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1112 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1113 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1114 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1115 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1116 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1117 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1118 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1119 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1120 * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1121 * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1122 * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1123 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1124 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1125 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1126 * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
1127 * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
1128 * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
1129 * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
1130 * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
1131 * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
1132 * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
1133 * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
1134 * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
1135 *
1136 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1137 * sAMAccountName: NewUser2Sam
1138 *
1139 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1140 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1141 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1142 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1143 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1144 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1145 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1146 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1147 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1148 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1149 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1150 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1151 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1152 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1153 * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1154 * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1155 * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1156 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1157 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1158 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1159 * 31dc704d3640335b2123d4ee28aa1f11 => ???M1 changes with NewUser2Sam => NewUser1Sam
1160 * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
1161 * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
1162 * 569b4533f2d9e580211dd040e5e360a8 => ???M2 changes with NewUser2Princ => NewUser1Princ
1163 * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
1164 * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
1165 * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
1166 * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
1167 * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
1168 */
1169
1170 /*
1171 * sAMAccountName, netbios_domain
1172 */
1173 {
1174 .user = &sAMAccountName,
1175 .realm = &netbios_domain,
1176 },
1177 {
1178 .user = &sAMAccountName_l,
1179 .realm = &netbios_domain_l,
1180 },
1181 {
1182 .user = &sAMAccountName_u,
1183 .realm = &netbios_domain_u,
1184 },
1185 {
1186 .user = &sAMAccountName,
1187 .realm = &netbios_domain_u,
1188 },
1189 {
1190 .user = &sAMAccountName,
1191 .realm = &netbios_domain_l,
1192 },
1193 {
1194 .user = &sAMAccountName_u,
1195 .realm = &netbios_domain_l,
1196 },
1197 {
1198 .user = &sAMAccountName_l,
1199 .realm = &netbios_domain_u,
1200 },
1201 /*
1202 * sAMAccountName, dns_domain
1203 */
1204 {
1205 .user = &sAMAccountName,
1206 .realm = &dns_domain,
1207 },
1208 {
1209 .user = &sAMAccountName_l,
1210 .realm = &dns_domain_l,
1211 },
1212 {
1213 .user = &sAMAccountName_u,
1214 .realm = &dns_domain_u,
1215 },
1216 {
1217 .user = &sAMAccountName,
1218 .realm = &dns_domain_u,
1219 },
1220 {
1221 .user = &sAMAccountName,
1222 .realm = &dns_domain_l,
1223 },
1224 {
1225 .user = &sAMAccountName_u,
1226 .realm = &dns_domain_l,
1227 },
1228 {
1229 .user = &sAMAccountName_l,
1230 .realm = &dns_domain_u,
1231 },
1232 /*
1233 * userPrincipalName, no realm
1234 */
1235 {
1236 .user = &userPrincipalName,
1237 },
1238 {
1239 /*
1240 * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
1241 * the fallback to the sAMAccountName based userPrincipalName is correct
1242 */
1243 .user = &userPrincipalName_l,
1244 },
1245 {
1246 .user = &userPrincipalName_u,
1247 },
1248 /*
1249 * nt4dom\sAMAccountName, no realm
1250 */
1251 {
1252 .user = &sAMAccountName,
1253 .nt4dom = &netbios_domain
1254 },
1255 {
1256 .user = &sAMAccountName_l,
1257 .nt4dom = &netbios_domain_l
1258 },
1259 {
1260 .user = &sAMAccountName_u,
1261 .nt4dom = &netbios_domain_u
1262 },
1263
1264 /*
1265 * the following ones are guessed depending on the technet2 article
1266 * but not reproducable on a w2k3 server
1267 */
1268 /* sAMAccountName with "Digest" realm */
1269 {
1270 .user = &sAMAccountName,
1271 .realm = &digest
1272 },
1273 {
1274 .user = &sAMAccountName_l,
1275 .realm = &digest
1276 },
1277 {
1278 .user = &sAMAccountName_u,
1279 .realm = &digest
1280 },
1281 /* userPrincipalName with "Digest" realm */
1282 {
1283 .user = &userPrincipalName,
1284 .realm = &digest
1285 },
1286 {
1287 .user = &userPrincipalName_l,
1288 .realm = &digest
1289 },
1290 {
1291 .user = &userPrincipalName_u,
1292 .realm = &digest
1293 },
1294 /* nt4dom\\sAMAccountName with "Digest" realm */
1295 {
1296 .user = &sAMAccountName,
1297 .nt4dom = &netbios_domain,
1298 .realm = &digest
1299 },
1300 {
1301 .user = &sAMAccountName_l,
1302 .nt4dom = &netbios_domain_l,
1303 .realm = &digest
1304 },
1305 {
1306 .user = &sAMAccountName_u,
1307 .nt4dom = &netbios_domain_u,
1308 .realm = &digest
1309 },
1310 };
1311
1312 /* prepare DATA_BLOB's used in the combinations array */
1313 sAMAccountName = data_blob_string_const(io->u.sAMAccountName);
1314 sAMAccountName_l = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
1315 if (!sAMAccountName_l.data) {
1316 return ldb_oom(ldb);
1317 }
1318 sAMAccountName_u = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
1319 if (!sAMAccountName_u.data) {
1320 return ldb_oom(ldb);
1321 }
1322
1323 /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
1324 if (!user_principal_name) {
1325 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
1326 io->u.sAMAccountName,
1327 io->ac->status->domain_data.dns_domain);
1328 if (!user_principal_name) {
1329 return ldb_oom(ldb);
1330 }
1331 }
1332 userPrincipalName = data_blob_string_const(user_principal_name);
1333 userPrincipalName_l = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
1334 if (!userPrincipalName_l.data) {
1335 return ldb_oom(ldb);
1336 }
1337 userPrincipalName_u = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
1338 if (!userPrincipalName_u.data) {
1339 return ldb_oom(ldb);
1340 }
1341
1342 netbios_domain = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
1343 netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac,
1344 io->ac->status->domain_data.netbios_domain));
1345 if (!netbios_domain_l.data) {
1346 return ldb_oom(ldb);
1347 }
1348 netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac,
1349 io->ac->status->domain_data.netbios_domain));
1350 if (!netbios_domain_u.data) {
1351 return ldb_oom(ldb);
1352 }
1353
1354 dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1355 dns_domain_l = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1356 dns_domain_u = data_blob_string_const(io->ac->status->domain_data.realm);
1357
1358 digest = data_blob_string_const("Digest");
1359
1360 delim = data_blob_string_const(":");
1361 backslash = data_blob_string_const("\\");
1362
1363 pdb->num_hashes = ARRAY_SIZE(wdigest);
1364 pdb->hashes = talloc_array(io->ac, struct package_PrimaryWDigestHash,
1365 pdb->num_hashes);
1366 if (!pdb->hashes) {
1367 return ldb_oom(ldb);
1368 }
1369
1370 for (i=0; i < ARRAY_SIZE(wdigest); i++) {
1371 struct MD5Context md5;
1372 MD5Init(&md5);
1373 if (wdigest[i].nt4dom) {
1374 MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
1375 MD5Update(&md5, backslash.data, backslash.length);
1376 }
1377 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
1378 MD5Update(&md5, delim.data, delim.length);
1379 if (wdigest[i].realm) {
1380 MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
1381 }
1382 MD5Update(&md5, delim.data, delim.length);
1383 MD5Update(&md5, io->n.cleartext_utf8->data, io->n.cleartext_utf8->length);
1384 MD5Final(pdb->hashes[i].hash, &md5);
1385 }
1386
1387 return LDB_SUCCESS;
1388 }
1389
1390 static int setup_supplemental_field(struct setup_password_fields_io *io)
1391 {
1392 struct ldb_context *ldb;
1393 struct supplementalCredentialsBlob scb;
1394 struct supplementalCredentialsBlob _old_scb;
1395 struct supplementalCredentialsBlob *old_scb = NULL;
1396 /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */
1397 uint32_t num_names = 0;
1398 const char *names[1+4];
1399 uint32_t num_packages = 0;
1400 struct supplementalCredentialsPackage packages[1+4];
1401 /* Packages */
1402 struct supplementalCredentialsPackage *pp = NULL;
1403 struct package_PackagesBlob pb;
1404 DATA_BLOB pb_blob;
1405 char *pb_hexstr;
1406 /* Primary:Kerberos-Newer-Keys */
1407 const char **nkn = NULL;
1408 struct supplementalCredentialsPackage *pkn = NULL;
1409 struct package_PrimaryKerberosBlob pknb;
1410 DATA_BLOB pknb_blob;
1411 char *pknb_hexstr;
1412 /* Primary:Kerberos */
1413 const char **nk = NULL;
1414 struct supplementalCredentialsPackage *pk = NULL;
1415 struct package_PrimaryKerberosBlob pkb;
1416 DATA_BLOB pkb_blob;
1417 char *pkb_hexstr;
1418 /* Primary:WDigest */
1419 const char **nd = NULL;
1420 struct supplementalCredentialsPackage *pd = NULL;
1421 struct package_PrimaryWDigestBlob pdb;
1422 DATA_BLOB pdb_blob;
1423 char *pdb_hexstr;
1424 /* Primary:CLEARTEXT */
1425 const char **nc = NULL;
1426 struct supplementalCredentialsPackage *pc = NULL;
1427 struct package_PrimaryCLEARTEXTBlob pcb;
1428 DATA_BLOB pcb_blob;
1429 char *pcb_hexstr;
1430 int ret;
1431 enum ndr_err_code ndr_err;
1432 uint8_t zero16[16];
1433 bool do_newer_keys = false;
1434 bool do_cleartext = false;
1435
1436 ZERO_STRUCT(zero16);
1437 ZERO_STRUCT(names);
1438
1439 ldb = ldb_module_get_ctx(io->ac->module);
1440
1441 if (!io->n.cleartext_utf8) {
1442 /*
1443 * when we don't have a cleartext password
1444 * we can't setup a supplementalCredential value
1445 */
1446 return LDB_SUCCESS;
1447 }
1448
1449 /* if there's an old supplementaCredentials blob then parse it */
1450 if (io->o.supplemental) {
1451 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
1452 &_old_scb,
1453 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
1454 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1455 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1456 ldb_asprintf_errstring(ldb,
1457 "setup_supplemental_field: "
1458 "failed to pull old supplementalCredentialsBlob: %s",
1459 nt_errstr(status));
1460 return LDB_ERR_OPERATIONS_ERROR;
1461 }
1462
1463 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
1464 old_scb = &_old_scb;
1465 } else {
1466 ldb_debug(ldb, LDB_DEBUG_ERROR,
1467 "setup_supplemental_field: "
1468 "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
1469 _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
1470 }
1471 }
1472 /* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
1473 do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
1474
1475 if (io->ac->status->domain_data.store_cleartext &&
1476 (io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
1477 do_cleartext = true;
1478 }
1479
1480 /*
1481 * The ordering is this
1482 *
1483 * Primary:Kerberos-Newer-Keys (optional)
1484 * Primary:Kerberos
1485 * Primary:WDigest
1486 * Primary:CLEARTEXT (optional)
1487 *
1488 * And the 'Packages' package is insert before the last
1489 * other package.
1490 */
1491 if (do_newer_keys) {
1492 /* Primary:Kerberos-Newer-Keys */
1493 nkn = &names[num_names++];
1494 pkn = &packages[num_packages++];
1495 }
1496
1497 /* Primary:Kerberos */
1498 nk = &names[num_names++];
1499 pk = &packages[num_packages++];
1500
1501 if (!do_cleartext) {
1502 /* Packages */
1503 pp = &packages[num_packages++];
1504 }
1505
1506 /* Primary:WDigest */
1507 nd = &names[num_names++];
1508 pd = &packages[num_packages++];
1509
1510 if (do_cleartext) {
1511 /* Packages */
1512 pp = &packages[num_packages++];
1513
1514 /* Primary:CLEARTEXT */
1515 nc = &names[num_names++];
1516 pc = &packages[num_packages++];
1517 }
1518
1519 if (pkn) {
1520 /*
1521 * setup 'Primary:Kerberos-Newer-Keys' element
1522 */
1523 *nkn = "Kerberos-Newer-Keys";
1524
1525 ret = setup_primary_kerberos_newer(io, old_scb, &pknb);
1526 if (ret != LDB_SUCCESS) {
1527 return ret;
1528 }
1529
1530 ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
1531 &pknb,
1532 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1533 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1534 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1535 ldb_asprintf_errstring(ldb,
1536 "setup_supplemental_field: "
1537 "failed to push package_PrimaryKerberosNeverBlob: %s",
1538 nt_errstr(status));
1539 return LDB_ERR_OPERATIONS_ERROR;
1540 }
1541 pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
1542 if (!pknb_hexstr) {
1543 return ldb_oom(ldb);
1544 }
1545 pkn->name = "Primary:Kerberos-Newer-Keys";
1546 pkn->reserved = 1;
1547 pkn->data = pknb_hexstr;
1548 }
1549
1550 /*
1551 * setup 'Primary:Kerberos' element
1552 */
1553 *nk = "Kerberos";
1554
1555 ret = setup_primary_kerberos(io, old_scb, &pkb);
1556 if (ret != LDB_SUCCESS) {
1557 return ret;
1558 }
1559
1560 ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
1561 &pkb,
1562 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1563 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1564 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1565 ldb_asprintf_errstring(ldb,
1566 "setup_supplemental_field: "
1567 "failed to push package_PrimaryKerberosBlob: %s",
1568 nt_errstr(status));
1569 return LDB_ERR_OPERATIONS_ERROR;
1570 }
1571 pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
1572 if (!pkb_hexstr) {
1573 return ldb_oom(ldb);
1574 }
1575 pk->name = "Primary:Kerberos";
1576 pk->reserved = 1;
1577 pk->data = pkb_hexstr;
1578
1579 /*
1580 * setup 'Primary:WDigest' element
1581 */
1582 *nd = "WDigest";
1583
1584 ret = setup_primary_wdigest(io, old_scb, &pdb);
1585 if (ret != LDB_SUCCESS) {
1586 return ret;
1587 }
1588
1589 ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
1590 &pdb,
1591 (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
1592 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1593 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1594 ldb_asprintf_errstring(ldb,
1595 "setup_supplemental_field: "
1596 "failed to push package_PrimaryWDigestBlob: %s",
1597 nt_errstr(status));
1598 return LDB_ERR_OPERATIONS_ERROR;
1599 }
1600 pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
1601 if (!pdb_hexstr) {
1602 return ldb_oom(ldb);
1603 }
1604 pd->name = "Primary:WDigest";
1605 pd->reserved = 1;
1606 pd->data = pdb_hexstr;
1607
1608 /*
1609 * setup 'Primary:CLEARTEXT' element
1610 */
1611 if (pc) {
1612 *nc = "CLEARTEXT";
1613
1614 pcb.cleartext = *io->n.cleartext_utf16;
1615
1616 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
1617 &pcb,
1618 (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
1619 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1620 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1621 ldb_asprintf_errstring(ldb,
1622 "setup_supplemental_field: "
1623 "failed to push package_PrimaryCLEARTEXTBlob: %s",
1624 nt_errstr(status));
1625 return LDB_ERR_OPERATIONS_ERROR;
1626 }
1627 pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
1628 if (!pcb_hexstr) {
1629 return ldb_oom(ldb);
1630 }
1631 pc->name = "Primary:CLEARTEXT";
1632 pc->reserved = 1;
1633 pc->data = pcb_hexstr;
1634 }
1635
1636 /*
1637 * setup 'Packages' element
1638 */
1639 pb.names = names;
1640 ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1641 &pb,
1642 (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1643 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1644 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1645 ldb_asprintf_errstring(ldb,
1646 "setup_supplemental_field: "
1647 "failed to push package_PackagesBlob: %s",
1648 nt_errstr(status));
1649 return LDB_ERR_OPERATIONS_ERROR;
1650 }
1651 pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
1652 if (!pb_hexstr) {
1653 return ldb_oom(ldb);
1654 }
1655 pp->name = "Packages";
1656 pp->reserved = 2;
1657 pp->data = pb_hexstr;
1658
1659 /*
1660 * setup 'supplementalCredentials' value
1661 */
1662 ZERO_STRUCT(scb);
1663 scb.sub.num_packages = num_packages;
1664 scb.sub.packages = packages;
1665
1666 ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1667 &scb,
1668 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1669 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1670 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1671 ldb_asprintf_errstring(ldb,
1672 "setup_supplemental_field: "
1673 "failed to push supplementalCredentialsBlob: %s",
1674 nt_errstr(status));
1675 return LDB_ERR_OPERATIONS_ERROR;
1676 }
1677
1678 return LDB_SUCCESS;
1679 }
1680
1681 static int setup_last_set_field(struct setup_password_fields_io *io)
1682 {
1683 const struct ldb_message *msg = NULL;
1684
1685 switch (io->ac->req->operation) {
1686 case LDB_ADD:
1687 msg = io->ac->req->op.add.message;
1688 break;
1689 case LDB_MODIFY:
1690 msg = io->ac->req->op.mod.message;
1691 break;
1692 default:
1693 return LDB_ERR_OPERATIONS_ERROR;
1694 break;
1695 }
1696
1697 if (io->ac->pwd_last_set_bypass) {
1698 struct ldb_message_element *el;
1699
1700 if (msg == NULL) {
1701 return LDB_ERR_CONSTRAINT_VIOLATION;
1702 }
1703
1704 el = ldb_msg_find_element(msg, "pwdLastSet");
1705 if (el == NULL) {
1706 return LDB_ERR_CONSTRAINT_VIOLATION;
1707 }
1708
1709 io->g.last_set = samdb_result_nttime(msg, "pwdLastSet", 0);
1710 return LDB_SUCCESS;
1711 }
1712
1713 /* set it as now */
1714 unix_to_nt_time(&io->g.last_set, time(NULL));
1715
1716 return LDB_SUCCESS;
1717 }
1718
1719 static int setup_given_passwords(struct setup_password_fields_io *io,
1720 struct setup_password_fields_given *g)
1721 {
1722 struct ldb_context *ldb;
1723 bool ok;
1724
1725 ldb = ldb_module_get_ctx(io->ac->module);
1726
1727 if (g->cleartext_utf8) {
1728 struct ldb_val *cleartext_utf16_blob;
1729
1730 cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
1731 if (!cleartext_utf16_blob) {
1732 return ldb_oom(ldb);
1733 }
1734 if (!convert_string_talloc(io->ac,
1735 CH_UTF8, CH_UTF16,
1736 g->cleartext_utf8->data,
1737 g->cleartext_utf8->length,
1738 (void *)&cleartext_utf16_blob->data,
1739 &cleartext_utf16_blob->length)) {
1740 if (g->cleartext_utf8->length != 0) {
1741 talloc_free(cleartext_utf16_blob);
1742 ldb_asprintf_errstring(ldb,
1743 "setup_password_fields: "
1744 "failed to generate UTF16 password from cleartext UTF8 one for user '%s'!",
1745 io->u.sAMAccountName);
1746 return LDB_ERR_CONSTRAINT_VIOLATION;
1747 } else {
1748 /* passwords with length "0" are valid! */
1749 cleartext_utf16_blob->data = NULL;
1750 cleartext_utf16_blob->length = 0;
1751 }
1752 }
1753 g->cleartext_utf16 = cleartext_utf16_blob;
1754 } else if (g->cleartext_utf16) {
1755 struct ldb_val *cleartext_utf8_blob;
1756
1757 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
1758 if (!cleartext_utf8_blob) {
1759 return ldb_oom(ldb);
1760 }
1761 if (!convert_string_talloc(io->ac,
1762 CH_UTF16MUNGED, CH_UTF8,
1763 g->cleartext_utf16->data,
1764 g->cleartext_utf16->length,
1765 (void *)&cleartext_utf8_blob->data,
1766 &cleartext_utf8_blob->length)) {
1767 if (g->cleartext_utf16->length != 0) {
1768 /* We must bail out here, the input wasn't even
1769 * a multiple of 2 bytes */
1770 talloc_free(cleartext_utf8_blob);
1771 ldb_asprintf_errstring(ldb,
1772 "setup_password_fields: "
1773 "failed to generate UTF8 password from cleartext UTF 16 one for user '%s' - the latter had odd length (length must be a multiple of 2)!",
1774 io->u.sAMAccountName);
1775 return LDB_ERR_CONSTRAINT_VIOLATION;
1776 } else {
1777 /* passwords with length "0" are valid! */
1778 cleartext_utf8_blob->data = NULL;
1779 cleartext_utf8_blob->length = 0;
1780 }
1781 }
1782 g->cleartext_utf8 = cleartext_utf8_blob;
1783 }
1784
1785 if (g->cleartext_utf16) {
1786 struct samr_Password *nt_hash;
1787
1788 nt_hash = talloc(io->ac, struct samr_Password);
1789 if (!nt_hash) {
1790 return ldb_oom(ldb);
1791 }
1792 g->nt_hash = nt_hash;
1793
1794 /* compute the new nt hash */
1795 mdfour(nt_hash->hash,
1796 g->cleartext_utf16->data,
1797 g->cleartext_utf16->length);
1798 }
1799
1800 if (g->cleartext_utf8) {
1801 struct samr_Password *lm_hash;
1802
1803 lm_hash = talloc(io->ac, struct samr_Password);
1804 if (!lm_hash) {
1805 return ldb_oom(ldb);
1806 }
1807
1808 /* compute the new lm hash */
1809 ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
1810 if (ok) {
1811 g->lm_hash = lm_hash;
1812 } else {
1813 talloc_free(lm_hash);
1814 }
1815 }
1816
1817 return LDB_SUCCESS;
1818 }
1819
1820 static int setup_password_fields(struct setup_password_fields_io *io)
1821 {
1822 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1823 struct loadparm_context *lp_ctx =
1824 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1825 struct loadparm_context);
1826 int ret;
1827
1828 /* transform the old password (for password changes) */
1829 ret = setup_given_passwords(io, &io->og);
1830 if (ret != LDB_SUCCESS) {
1831 return ret;
1832 }
1833
1834 /* transform the new password */
1835 ret = setup_given_passwords(io, &io->n);
1836 if (ret != LDB_SUCCESS) {
1837 return ret;
1838 }
1839
1840 if (io->n.cleartext_utf8) {
1841 ret = setup_kerberos_keys(io);
1842 if (ret != LDB_SUCCESS) {
1843 return ret;
1844 }
1845 }
1846
1847 ret = setup_nt_fields(io);
1848 if (ret != LDB_SUCCESS) {
1849 return ret;
1850 }
1851
1852 if (lpcfg_lanman_auth(lp_ctx)) {
1853 ret = setup_lm_fields(io);
1854 if (ret != LDB_SUCCESS) {
1855 return ret;
1856 }
1857 } else {
1858 io->g.lm_hash = NULL;
1859 io->g.lm_history_len = 0;
1860 }
1861
1862 ret = setup_supplemental_field(io);
1863 if (ret != LDB_SUCCESS) {
1864 return ret;
1865 }
1866
1867 ret = setup_last_set_field(io);
1868 if (ret != LDB_SUCCESS) {
1869 return ret;
1870 }
1871
1872 return LDB_SUCCESS;
1873 }
1874
1875 static int check_password_restrictions(struct setup_password_fields_io *io)
1876 {
1877 struct ldb_context *ldb;
1878 int ret;
1879 enum samr_ValidationStatus stat;
1880
1881 ldb = ldb_module_get_ctx(io->ac->module);
1882
1883 /* First check the old password is correct, for password changes */
1884 if (!io->ac->pwd_reset) {
1885 bool nt_hash_checked = false;
1886
1887 /* we need the old nt or lm hash given by the client */
1888 if (!io->og.nt_hash && !io->og.lm_hash) {
1889 ldb_asprintf_errstring(ldb,
1890 "check_password_restrictions: "
1891 "You need to provide the old password in order "
1892 "to change it!");
1893 return LDB_ERR_UNWILLING_TO_PERFORM;
1894 }
1895
1896 /* The password modify through the NT hash is encouraged and
1897 has no problems at all */
1898 if (io->og.nt_hash) {
1899 if (!io->o.nt_hash) {
1900 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1901 ldb_asprintf_errstring(ldb,
1902 "%08X: %s - check_password_restrictions: "
1903 "There's no old nt_hash, which is needed "
1904 "in order to change your password!",
1905 W_ERROR_V(WERR_INVALID_PASSWORD),
1906 ldb_strerror(ret));
1907 return ret;
1908 }
1909
1910 if (memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
1911 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1912 ldb_asprintf_errstring(ldb,
1913 "%08X: %s - check_password_restrictions: "
1914 "The old password specified doesn't match!",
1915 W_ERROR_V(WERR_INVALID_PASSWORD),
1916 ldb_strerror(ret));
1917 return ret;
1918 }
1919
1920 nt_hash_checked = true;
1921 }
1922
1923 /* But it is also possible to change a password by the LM hash
1924 * alone for compatibility reasons. This check is optional if
1925 * the NT hash was already checked - otherwise it's mandatory.
1926 * (as the SAMR operations request it). */
1927 if (io->og.lm_hash) {
1928 if (!io->o.lm_hash && !nt_hash_checked) {
1929 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1930 ldb_asprintf_errstring(ldb,
1931 "%08X: %s - check_password_restrictions: "
1932 "There's no old lm_hash, which is needed "
1933 "in order to change your password!",
1934 W_ERROR_V(WERR_INVALID_PASSWORD),
1935 ldb_strerror(ret));
1936 return ret;
1937 }
1938
1939 if (io->o.lm_hash &&
1940 memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0) {
1941 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1942 ldb_asprintf_errstring(ldb,
1943 "%08X: %s - check_password_restrictions: "
1944 "The old password specified doesn't match!",
1945 W_ERROR_V(WERR_INVALID_PASSWORD),
1946 ldb_strerror(ret));
1947 return ret;
1948 }
1949 }
1950 }
1951
1952 if (io->u.restrictions == 0) {
1953 /* FIXME: Is this right? */
1954 return LDB_SUCCESS;
1955 }
1956
1957 /*
1958 * Fundamental password checks done by the call
1959 * "samdb_check_password".
1960 * It is also in use by "dcesrv_samr_ValidatePassword".
1961 */
1962 if (io->n.cleartext_utf8 != NULL) {
1963 stat = samdb_check_password(io->n.cleartext_utf8,
1964 io->ac->status->domain_data.pwdProperties,
1965 io->ac->status->domain_data.minPwdLength);
1966 switch (stat) {
1967 case SAMR_VALIDATION_STATUS_SUCCESS:
1968 /* perfect -> proceed! */
1969 break;
1970
1971 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
1972 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1973 ldb_asprintf_errstring(ldb,
1974 "%08X: %s - check_password_restrictions: "
1975 "the password is too short. It should be equal or longer than %u characters!",
1976 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1977 ldb_strerror(ret),
1978 io->ac->status->domain_data.minPwdLength);
1979 io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
1980 return ret;
1981
1982 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
1983 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1984 ldb_asprintf_errstring(ldb,
1985 "%08X: %s - check_password_restrictions: "
1986 "the password does not meet the complexity criteria!",
1987 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1988 ldb_strerror(ret));
1989 io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
1990 return ret;
1991
1992 default:
1993 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1994 ldb_asprintf_errstring(ldb,
1995 "%08X: %s - check_password_restrictions: "
1996 "the password doesn't fit by a certain reason!",
1997 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1998 ldb_strerror(ret));
1999 return ret;
2000 }
2001 }
2002
2003 if (io->ac->pwd_reset) {
2004 return LDB_SUCCESS;
2005 }
2006
2007 if (io->n.nt_hash) {
2008 uint32_t i;
2009
2010 /* checks the NT hash password history */
2011 for (i = 0; i < io->o.nt_history_len; i++) {
2012 ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
2013 if (ret == 0) {
2014 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2015 ldb_asprintf_errstring(ldb,
2016 "%08X: %s - check_password_restrictions: "
2017 "the password was already used (in history)!",
2018 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2019 ldb_strerror(ret));
2020 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2021 return ret;
2022 }
2023 }
2024 }
2025
2026 if (io->n.lm_hash) {
2027 uint32_t i;
2028
2029 /* checks the LM hash password history */
2030 for (i = 0; i < io->o.lm_history_len; i++) {
2031 ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
2032 if (ret == 0) {
2033 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2034 ldb_asprintf_errstring(ldb,
2035 "%08X: %s - check_password_restrictions: "
2036 "the password was already used (in history)!",
2037 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2038 ldb_strerror(ret));
2039 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2040 return ret;
2041 }
2042 }
2043 }
2044
2045 /* are all password changes disallowed? */
2046 if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
2047 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2048 ldb_asprintf_errstring(ldb,
2049 "%08X: %s - check_password_restrictions: "
2050 "password changes disabled!",
2051 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2052 ldb_strerror(ret));
2053 return ret;
2054 }
2055
2056 /* can this user change the password? */
2057 if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
2058 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2059 ldb_asprintf_errstring(ldb,
2060 "%08X: %s - check_password_restrictions: "
2061 "password can't be changed on this account!",
2062 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2063 ldb_strerror(ret));
2064 return ret;
2065 }
2066
2067 /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
2068 if (io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) {
2069 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2070 ldb_asprintf_errstring(ldb,
2071 "%08X: %s - check_password_restrictions: "
2072 "password is too young to change!",
2073 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2074 ldb_strerror(ret));
2075 return ret;
2076 }
2077
2078 return LDB_SUCCESS;
2079 }
2080
2081 /*
2082 * This is intended for use by the "password_hash" module since there
2083 * password changes can be specified through one message element with the
2084 * new password (to set) and another one with the old password (to unset).
2085 *
2086 * The first which sets a password (new value) can have flags
2087 * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
2088 * for entries). The latter (old value) has always specified
2089 * LDB_FLAG_MOD_DELETE.
2090 *
2091 * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
2092 * matching message elements are malformed in respect to the set/change rules.
2093 * Otherwise it returns LDB_SUCCESS.
2094 */
2095 static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
2096 const char *name,
2097 enum ldb_request_type operation,
2098 const struct ldb_val **new_val,
2099 const struct ldb_val **old_val)
2100 {
2101 unsigned int i;
2102
2103 *new_val = NULL;
2104 *old_val = NULL;
2105
2106 if (msg == NULL) {
2107 return LDB_SUCCESS;
2108 }
2109
2110 for (i = 0; i < msg->num_elements; i++) {
2111 if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
2112 continue;
2113 }
2114
2115 if ((operation == LDB_MODIFY) &&
2116 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
2117 /* 0 values are allowed */
2118 if (msg->elements[i].num_values == 1) {
2119 *old_val = &msg->elements[i].values[0];
2120 } else if (msg->elements[i].num_values > 1) {
2121 return LDB_ERR_CONSTRAINT_VIOLATION;
2122 }
2123 } else if ((operation == LDB_MODIFY) &&
2124 (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
2125 if (msg->elements[i].num_values > 0) {
2126 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2127 } else {
2128 return LDB_ERR_UNWILLING_TO_PERFORM;
2129 }
2130 } else {
2131 /* Add operations and LDB_FLAG_MOD_ADD */
2132 if (msg->elements[i].num_values > 0) {
2133 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2134 } else {
2135 return LDB_ERR_CONSTRAINT_VIOLATION;
2136 }
2137 }
2138 }
2139
2140 return LDB_SUCCESS;
2141 }
2142
2143 static int setup_io(struct ph_context *ac,
2144 const struct ldb_message *orig_msg,
2145 const struct ldb_message *searched_msg,
2146 struct setup_password_fields_io *io)
2147 {
2148 const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
2149 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2150 struct loadparm_context *lp_ctx =
2151 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2152 struct loadparm_context);
2153 int ret;
2154
2155 ZERO_STRUCTP(io);
2156
2157 /* Some operations below require kerberos contexts */
2158
2159 if (smb_krb5_init_context(ac,
2160 ldb_get_event_context(ldb),
2161 (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
2162 &io->smb_krb5_context) != 0) {
2163 return ldb_operr(ldb);
2164 }
2165
2166 io->ac = ac;
2167
2168 io->u.userAccountControl = ldb_msg_find_attr_as_uint(searched_msg,
2169 "userAccountControl", 0);
2170 io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
2171 io->u.sAMAccountName = ldb_msg_find_attr_as_string(searched_msg,
2172 "sAMAccountName", NULL);
2173 io->u.user_principal_name = ldb_msg_find_attr_as_string(searched_msg,
2174 "userPrincipalName", NULL);
2175 io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
2176
2177 if (io->u.sAMAccountName == NULL) {
2178 ldb_asprintf_errstring(ldb,
2179 "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
2180 ldb_dn_get_linearized(searched_msg->dn));
2181
2182 return LDB_ERR_CONSTRAINT_VIOLATION;
2183 }
2184
2185 /* Only non-trust accounts have restrictions (possibly this test is the
2186 * wrong way around, but we like to be restrictive if possible */
2187 io->u.restrictions = !(io->u.userAccountControl
2188 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
2189 | UF_SERVER_TRUST_ACCOUNT));
2190
2191 if (!ldb_req_is_untrusted(ac->req) &&
2192 (io->u.userAccountControl & UF_PASSWD_NOTREQD))
2193 {
2194 /* see [MS-ADTS] 2.2.15 */
2195 /*
2196 * This seems to only happen for SAMR
2197 * and not for LDAP clients
2198 */
2199 io->u.restrictions = 0;
2200 }
2201
2202 if (ac->userPassword) {
2203 ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
2204 ac->req->operation,
2205 &io->n.cleartext_utf8,
2206 &io->og.cleartext_utf8);
2207 if (ret != LDB_SUCCESS) {
2208 ldb_asprintf_errstring(ldb,
2209 "setup_io: "
2210 "it's only allowed to set the old password once!");
2211 return ret;
2212 }
2213 }
2214
2215 ret = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
2216 ac->req->operation,
2217 &io->n.cleartext_utf16,
2218 &io->og.cleartext_utf16);
2219 if (ret != LDB_SUCCESS) {
2220 ldb_asprintf_errstring(ldb,
2221 "setup_io: "
2222 "it's only allowed to set the old password once!");
2223 return ret;
2224 }
2225
2226 /* this rather strange looking piece of code is there to
2227 handle a ldap client setting a password remotely using the
2228 unicodePwd ldap field. The syntax is that the password is
2229 in UTF-16LE, with a " at either end. Unfortunately the
2230 unicodePwd field is also used to store the nt hashes
2231 internally in Samba, and is used in the nt hash format on
2232 the wire in DRS replication, so we have a single name for
2233 two distinct values. The code below leaves us with a small
2234 chance (less than 1 in 2^32) of a mixup, if someone manages
2235 to create a MD4 hash which starts and ends in 0x22 0x00, as
2236 that would then be treated as a UTF16 password rather than
2237 a nthash */
2238
2239 ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
2240 ac->req->operation,
2241 &quoted_utf16,
2242 &old_quoted_utf16);
2243 if (ret != LDB_SUCCESS) {
2244 ldb_asprintf_errstring(ldb,
2245 "setup_io: "
2246 "it's only allowed to set the old password once!");
2247 return ret;
2248 }
2249
2250 /* Checks and converts the actual "unicodePwd" attribute */
2251 if (!ac->hash_values &&
2252 quoted_utf16 &&
2253 quoted_utf16->length >= 4 &&
2254 quoted_utf16->data[0] == '"' &&
2255 quoted_utf16->data[1] == 0 &&
2256 quoted_utf16->data[quoted_utf16->length-2] == '"' &&
2257 quoted_utf16->data[quoted_utf16->length-1] == 0) {
2258 struct ldb_val *quoted_utf16_2;
2259
2260 if (io->n.cleartext_utf16) {
2261 /* refuse the change if someone wants to change with
2262 with both UTF16 possibilities at the same time... */
2263 ldb_asprintf_errstring(ldb,
2264 "setup_io: "
2265 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2266 return LDB_ERR_UNWILLING_TO_PERFORM;
2267 }
2268
2269 /*
2270 * adapt the quoted UTF16 string to be a real
2271 * cleartext one
2272 */
2273 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2274 if (quoted_utf16_2 == NULL) {
2275 return ldb_oom(ldb);
2276 }
2277
2278 quoted_utf16_2->data = quoted_utf16->data + 2;
2279 quoted_utf16_2->length = quoted_utf16->length-4;
2280 io->n.cleartext_utf16 = quoted_utf16_2;
2281 io->n.nt_hash = NULL;
2282
2283 } else if (quoted_utf16) {
2284 /* We have only the hash available -> so no plaintext here */
2285 if (!ac->hash_values) {
2286 /* refuse the change if someone wants to change
2287 the hash without control specified... */
2288 ldb_asprintf_errstring(ldb,
2289 "setup_io: "
2290 "it's not allowed to set the NT hash password directly'");
2291 /* this looks odd but this is what Windows does:
2292 returns "UNWILLING_TO_PERFORM" on wrong
2293 password sets and "CONSTRAINT_VIOLATION" on
2294 wrong password changes. */
2295 if (old_quoted_utf16 == NULL) {
2296 return LDB_ERR_UNWILLING_TO_PERFORM;
2297 }
2298
2299 return LDB_ERR_CONSTRAINT_VIOLATION;
2300 }
2301
2302 io->n.nt_hash = talloc(io->ac, struct samr_Password);
2303 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
2304 MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
2305 }
2306
2307 /* Checks and converts the previous "unicodePwd" attribute */
2308 if (!ac->hash_values &&
2309 old_quoted_utf16 &&
2310 old_quoted_utf16->length >= 4 &&
2311 old_quoted_utf16->data[0] == '"' &&
2312 old_quoted_utf16->data[1] == 0 &&
2313 old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
2314 old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
2315 struct ldb_val *old_quoted_utf16_2;
2316
2317 if (io->og.cleartext_utf16) {
2318 /* refuse the change if someone wants to change with
2319 both UTF16 possibilities at the same time... */
2320 ldb_asprintf_errstring(ldb,
2321 "setup_io: "
2322 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2323 return LDB_ERR_UNWILLING_TO_PERFORM;
2324 }
2325
2326 /*
2327 * adapt the quoted UTF16 string to be a real
2328 * cleartext one
2329 */
2330 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2331 if (old_quoted_utf16_2 == NULL) {
2332 return ldb_oom(ldb);
2333 }
2334
2335 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
2336 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
2337
2338 io->og.cleartext_utf16 = old_quoted_utf16_2;
2339 io->og.nt_hash = NULL;
2340 } else if (old_quoted_utf16) {
2341 /* We have only the hash available -> so no plaintext here */
2342 if (!ac->hash_values) {
2343 /* refuse the change if someone wants to change
2344 the hash without control specified... */
2345 ldb_asprintf_errstring(ldb,
2346 "setup_io: "
2347 "it's not allowed to set the NT hash password directly'");
2348 return LDB_ERR_UNWILLING_TO_PERFORM;
2349 }
2350
2351 io->og.nt_hash = talloc(io->ac, struct samr_Password);
2352 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
2353 MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
2354 }
2355
2356 /* Handles the "dBCSPwd" attribute (LM hash) */
2357 io->n.lm_hash = NULL; io->og.lm_hash = NULL;
2358 ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
2359 ac->req->operation,
2360 &lm_hash, &old_lm_hash);
2361 if (ret != LDB_SUCCESS) {
2362 ldb_asprintf_errstring(ldb,
2363 "setup_io: "
2364 "it's only allowed to set the old password once!");
2365 return ret;
2366 }
2367
2368 if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
2369 /* refuse the change if someone wants to change the hash
2370 without control specified... */
2371 ldb_asprintf_errstring(ldb,
2372 "setup_io: "
2373 "it's not allowed to set the LM hash password directly'");
2374 return LDB_ERR_UNWILLING_TO_PERFORM;
2375 }
2376
2377 if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
2378 io->n.lm_hash = talloc(io->ac, struct samr_Password);
2379 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
2380 sizeof(io->n.lm_hash->hash)));
2381 }
2382 if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
2383 io->og.lm_hash = talloc(io->ac, struct samr_Password);
2384 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
2385 sizeof(io->og.lm_hash->hash)));
2386 }
2387
2388 /*
2389 * Handles the password change control if it's specified. It has the
2390 * precedance and overrides already specified old password values of
2391 * change requests (but that shouldn't happen since the control is
2392 * fully internal and only used in conjunction with replace requests!).
2393 */
2394 if (ac->change != NULL) {
2395 io->og.nt_hash = NULL;
2396 if (ac->change->old_nt_pwd_hash != NULL) {
2397 io->og.nt_hash = talloc_memdup(io->ac,
2398 ac->change->old_nt_pwd_hash,
2399 sizeof(struct samr_Password));
2400 }
2401 io->og.lm_hash = NULL;
2402 if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
2403 io->og.lm_hash = talloc_memdup(io->ac,
2404 ac->change->old_lm_pwd_hash,
2405 sizeof(struct samr_Password));
2406 }
2407 }
2408
2409 /* refuse the change if someone wants to change the clear-
2410 text and supply his own hashes at the same time... */
2411 if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
2412 && (io->n.nt_hash || io->n.lm_hash)) {
2413 ldb_asprintf_errstring(ldb,
2414 "setup_io: "
2415 "it's only allowed to set the password in form of cleartext attributes or as hashes");
2416 return LDB_ERR_UNWILLING_TO_PERFORM;
2417 }
2418
2419 /* refuse the change if someone wants to change the password
2420 using both plaintext methods (UTF8 and UTF16) at the same time... */
2421 if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
2422 ldb_asprintf_errstring(ldb,
2423 "setup_io: "
2424 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2425 return LDB_ERR_UNWILLING_TO_PERFORM;
2426 }
2427
2428 /* refuse the change if someone tries to set/change the password by
2429 * the lanman hash alone and we've deactivated that mechanism. This
2430 * would end in an account without any password! */
2431 if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
2432 && (!io->n.nt_hash) && (!io->n.lm_hash)) {
2433 ldb_asprintf_errstring(ldb,
2434 "setup_io: "
2435 "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
2436 /* on "userPassword" and "clearTextPassword" we've to return
2437 * something different, since these are virtual attributes */
2438 if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
2439 (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
2440 return LDB_ERR_CONSTRAINT_VIOLATION;
2441 }
2442 return LDB_ERR_UNWILLING_TO_PERFORM;
2443 }
2444
2445 /* refuse the change if someone wants to compare against a plaintext
2446 or hash at the same time for a "password modify" operation... */
2447 if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
2448 && (io->og.nt_hash || io->og.lm_hash)) {
2449 ldb_asprintf_errstring(ldb,
2450 "setup_io: "
2451 "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
2452 return LDB_ERR_UNWILLING_TO_PERFORM;
2453 }
2454
2455 /* refuse the change if someone wants to compare against both
2456 * plaintexts at the same time for a "password modify" operation... */
2457 if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
2458 ldb_asprintf_errstring(ldb,
2459 "setup_io: "
2460 "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2461 return LDB_ERR_UNWILLING_TO_PERFORM;
2462 }
2463
2464 /* Decides if we have a password modify or password reset operation */
2465 if (ac->req->operation == LDB_ADD) {
2466 /* On "add" we have only "password reset" */
2467 ac->pwd_reset = true;
2468 } else if (ac->req->operation == LDB_MODIFY) {
2469 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
2470 || io->og.nt_hash || io->og.lm_hash) {
2471 /* If we have an old password specified then for sure it
2472 * is a user "password change" */
2473 ac->pwd_reset = false;
2474 } else {
2475 /* Otherwise we have also here a "password reset" */
2476 ac->pwd_reset = true;
2477 }
2478 } else {
2479 /* this shouldn't happen */
2480 return ldb_operr(ldb);
2481 }
2482
2483 return LDB_SUCCESS;
2484 }
2485
2486 static struct ph_context *ph_init_context(struct ldb_module *module,
2487 struct ldb_request *req,
2488 bool userPassword)
2489 {
2490 struct ldb_context *ldb;
2491 struct ph_context *ac;
2492
2493 ldb = ldb_module_get_ctx(module);
2494
2495 ac = talloc_zero(req, struct ph_context);
2496 if (ac == NULL) {
2497 ldb_set_errstring(ldb, "Out of Memory");
2498 return NULL;
2499 }
2500
2501 ac->module = module;
2502 ac->req = req;
2503 ac->userPassword = userPassword;
2504
2505 return ac;
2506 }
2507
2508 static void ph_apply_controls(struct ph_context *ac)
2509 {
2510 struct ldb_control *ctrl;
2511
2512 ac->change_status = false;
2513 ctrl = ldb_request_get_control(ac->req,
2514 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
2515 if (ctrl != NULL) {
2516 ac->change_status = true;
2517
2518 /* Mark the "change status" control as uncritical (done) */
2519 ctrl->critical = false;
2520 }
2521
2522 ac->hash_values = false;
2523 ctrl = ldb_request_get_control(ac->req,
2524 DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
2525 if (ctrl != NULL) {
2526 ac->hash_values = true;
2527
2528 /* Mark the "hash values" control as uncritical (done) */
2529 ctrl->critical = false;
2530 }
2531
2532 ctrl = ldb_request_get_control(ac->req,
2533 DSDB_CONTROL_PASSWORD_CHANGE_OID);
2534 if (ctrl != NULL) {
2535 ac->change = (struct dsdb_control_password_change *) ctrl->data;
2536
2537 /* Mark the "change" control as uncritical (done) */
2538 ctrl->critical = false;
2539 }
2540
2541 ac->pwd_last_set_bypass = false;
2542 ctrl = ldb_request_get_control(ac->req,
2543 DSDB_CONTROL_PASSWORD_BYPASS_LAST_SET_OID);
2544 if (ctrl != NULL) {
2545 ac->pwd_last_set_bypass = true;
2546
2547 /* Mark the "bypass pwdLastSet" control as uncritical (done) */
2548 ctrl->critical = false;
2549 }
2550 }
2551
2552 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
2553 {
2554 struct ph_context *ac;
2555
2556 ac = talloc_get_type(req->context, struct ph_context);
2557
2558 if (!ares) {
2559 return ldb_module_done(ac->req, NULL, NULL,
2560 LDB_ERR_OPERATIONS_ERROR);
2561 }
2562
2563 if (ares->type == LDB_REPLY_REFERRAL) {
2564 return ldb_module_send_referral(ac->req, ares->referral);
2565 }
2566
2567 if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2568 /* On success and trivial errors a status control is being
2569 * added (used for example by the "samdb_set_password" call) */
2570 ldb_reply_add_control(ares,
2571 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2572 false,
2573 ac->status);
2574 }
2575
2576 if (ares->error != LDB_SUCCESS) {
2577 return ldb_module_done(ac->req, ares->controls,
2578 ares->response, ares->error);
2579 }
2580
2581 if (ares->type != LDB_REPLY_DONE) {
2582 talloc_free(ares);
2583 return ldb_module_done(ac->req, NULL, NULL,
2584 LDB_ERR_OPERATIONS_ERROR);
2585 }
2586
2587 return ldb_module_done(ac->req, ares->controls,
2588 ares->response, ares->error);
2589 }
2590
2591 static int password_hash_add_do_add(struct ph_context *ac);
2592 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2593 static int password_hash_mod_search_self(struct ph_context *ac);
2594 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2595 static int password_hash_mod_do_mod(struct ph_context *ac);
2596
2597 static int get_domain_data_callback(struct ldb_request *req,
2598 struct ldb_reply *ares)
2599 {
2600 struct ldb_context *ldb;
2601 struct ph_context *ac;
2602 struct loadparm_context *lp_ctx;
2603 int ret;
2604
2605 ac = talloc_get_type(req->context, struct ph_context);
2606 ldb = ldb_module_get_ctx(ac->module);
2607
2608 if (!ares) {
2609 ret = LDB_ERR_OPERATIONS_ERROR;
2610 goto done;
2611 }
2612 if (ares->error != LDB_SUCCESS) {
2613 return ldb_module_done(ac->req, ares->controls,
2614 ares->response, ares->error);
2615 }
2616
2617 switch (ares->type) {
2618 case LDB_REPLY_ENTRY:
2619 if (ac->status != NULL) {
2620 talloc_free(ares);
2621
2622 ldb_set_errstring(ldb, "Too many results");
2623 ret = LDB_ERR_OPERATIONS_ERROR;
2624 goto done;
2625 }
2626
2627 /* Setup the "status" structure (used as control later) */
2628 ac->status = talloc_zero(ac->req,
2629 struct dsdb_control_password_change_status);
2630 if (ac->status == NULL) {
2631 talloc_free(ares);
2632
2633 ldb_oom(ldb);
2634 ret = LDB_ERR_OPERATIONS_ERROR;
2635 goto done;
2636 }
2637
2638 /* Setup the "domain data" structure */
2639 ac->status->domain_data.pwdProperties =
2640 ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
2641 ac->status->domain_data.pwdHistoryLength =
2642 ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
2643 ac->status->domain_data.maxPwdAge =
2644 ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
2645 ac->status->domain_data.minPwdAge =
2646 ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
2647 ac->status->domain_data.minPwdLength =
2648 ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
2649 ac->status->domain_data.store_cleartext =
2650 ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2651
2652 talloc_free(ares);
2653
2654 /* For a domain DN, this puts things in dotted notation */
2655 /* For builtin domains, this will give details for the host,
2656 * but that doesn't really matter, as it's just used for salt
2657 * and kerberos principals, which don't exist here */
2658
2659 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2660 struct loadparm_context);
2661
2662 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2663 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2664 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2665
2666 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2667
2668 ret = LDB_SUCCESS;
2669 break;
2670
2671 case LDB_REPLY_REFERRAL:
2672 /* ignore */
2673 talloc_free(ares);
2674 ret = LDB_SUCCESS;
2675 break;
2676
2677 case LDB_REPLY_DONE:
2678 talloc_free(ares);
2679 /* call the next step */
2680 switch (ac->req->operation) {
2681 case LDB_ADD:
2682 ret = password_hash_add_do_add(ac);
2683 break;
2684
2685 case LDB_MODIFY:
2686 ret = password_hash_mod_do_mod(ac);
2687 break;
2688
2689 default:
2690 ret = LDB_ERR_OPERATIONS_ERROR;
2691 break;
2692 }
2693 break;
2694 }
2695
2696 done:
2697 if (ret != LDB_SUCCESS) {
2698 struct ldb_reply *new_ares;
2699
2700 new_ares = talloc_zero(ac->req, struct ldb_reply);
2701 if (new_ares == NULL) {
2702 ldb_oom(ldb);
2703 return ldb_module_done(ac->req, NULL, NULL,
2704 LDB_ERR_OPERATIONS_ERROR);
2705 }
2706
2707 new_ares->error = ret;
2708 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2709 /* On success and trivial errors a status control is being
2710 * added (used for example by the "samdb_set_password" call) */
2711 ldb_reply_add_control(new_ares,
2712 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2713 false,
2714 ac->status);
2715 }
2716
2717 return ldb_module_done(ac->req, new_ares->controls,
2718 new_ares->response, new_ares->error);
2719 }
2720
2721 return LDB_SUCCESS;
2722 }
2723
2724 static int build_domain_data_request(struct ph_context *ac)
2725 {
2726 /* attrs[] is returned from this function in
2727 ac->dom_req->op.search.attrs, so it must be static, as
2728 otherwise the compiler can put it on the stack */
2729 struct ldb_context *ldb;
2730 static const char * const attrs[] = { "pwdProperties",
2731 "pwdHistoryLength",
2732 "maxPwdAge",
2733 "minPwdAge",
2734 "minPwdLength",
2735 NULL };
2736 int ret;
2737
2738 ldb = ldb_module_get_ctx(ac->module);
2739
2740 ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
2741 ldb_get_default_basedn(ldb),
2742 LDB_SCOPE_BASE,
2743 NULL, attrs,
2744 NULL,
2745 ac, get_domain_data_callback,
2746 ac->req);
2747 LDB_REQ_SET_LOCATION(ac->dom_req);
2748 return ret;
2749 }
2750
2751 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2752 {
2753 struct ldb_context *ldb;
2754 struct ph_context *ac;
2755 struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2756 *ntAttr, *lmAttr;
2757 int ret;
2758 struct ldb_control *bypass = NULL;
2759 bool userPassword = dsdb_user_password_support(module, req, req);
2760
2761 ldb = ldb_module_get_ctx(module);
2762
2763 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2764
2765 if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2766 return ldb_next_request(module, req);
2767 }
2768
2769 bypass = ldb_request_get_control(req,
2770 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2771 if (bypass != NULL) {
2772 /* Mark the "bypass" control as uncritical (done) */
2773 bypass->critical = false;
2774 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2775 return password_hash_bypass(module, req);
2776 }
2777
2778 /* nobody must touch password histories and 'supplementalCredentials' */
2779 if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2780 return LDB_ERR_UNWILLING_TO_PERFORM;
2781 }
2782 if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2783 return LDB_ERR_UNWILLING_TO_PERFORM;
2784 }
2785 if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2786 return LDB_ERR_UNWILLING_TO_PERFORM;
2787 }
2788
2789 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2790 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2791
2792 userPasswordAttr = NULL;
2793 if (userPassword) {
2794 userPasswordAttr = ldb_msg_find_element(req->op.add.message,
2795 "userPassword");
2796 /* MS-ADTS 3.1.1.3.1.5.2 */
2797 if ((userPasswordAttr != NULL) &&
2798 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2799 return LDB_ERR_CONSTRAINT_VIOLATION;
2800 }
2801 }
2802 clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2803 ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2804 lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2805
2806 if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2807 return ldb_next_request(module, req);
2808 }
2809
2810 /* Make sure we are performing the password set action on a (for us)
2811 * valid object. Those are instances of either "user" and/or
2812 * "inetOrgPerson". Otherwise continue with the submodules. */
2813 if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2814 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2815
2816 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2817 ldb_set_errstring(ldb,
2818 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2819 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2820 }
2821
2822 return ldb_next_request(module, req);
2823 }
2824
2825 ac = ph_init_context(module, req, userPassword);
2826 if (ac == NULL) {
2827 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2828 return ldb_operr(ldb);
2829 }
2830 ph_apply_controls(ac);
2831
2832 /* get user domain data */
2833 ret = build_domain_data_request(ac);
2834 if (ret != LDB_SUCCESS) {
2835 return ret;
2836 }
2837
2838 return ldb_next_request(module, ac->dom_req);
2839 }
2840
2841 static int password_hash_add_do_add(struct ph_context *ac)
2842 {
2843 struct ldb_context *ldb;
2844 struct ldb_request *down_req;
2845 struct ldb_message *msg;
2846 struct setup_password_fields_io io;
2847 int ret;
2848
2849 /* Prepare the internal data structure containing the passwords */
2850 ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2851 if (ret != LDB_SUCCESS) {
2852 return ret;
2853 }
2854
2855 ldb = ldb_module_get_ctx(ac->module);
2856
2857 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2858 if (msg == NULL) {
2859 return ldb_operr(ldb);
2860 }
2861
2862 /* remove attributes that we just read into 'io' */
2863 if (ac->userPassword) {
2864 ldb_msg_remove_attr(msg, "userPassword");
2865 }
2866 ldb_msg_remove_attr(msg, "clearTextPassword");
2867 ldb_msg_remove_attr(msg, "unicodePwd");
2868 ldb_msg_remove_attr(msg, "dBCSPwd");
2869 ldb_msg_remove_attr(msg, "pwdLastSet");
2870
2871 ret = setup_password_fields(&io);
2872 if (ret != LDB_SUCCESS) {
2873 return ret;
2874 }
2875
2876 ret = check_password_restrictions(&io);
2877 if (ret != LDB_SUCCESS) {
2878 return ret;
2879 }
2880
2881 if (io.g.nt_hash) {
2882 ret = samdb_msg_add_hash(ldb, ac, msg,
2883 "unicodePwd", io.g.nt_hash);
2884 if (ret != LDB_SUCCESS) {
2885 return ret;
2886 }
2887 }
2888 if (io.g.lm_hash) {
2889 ret = samdb_msg_add_hash(ldb, ac, msg,
2890 "dBCSPwd", io.g.lm_hash);
2891 if (ret != LDB_SUCCESS) {
2892 return ret;
2893 }
2894 }
2895 if (io.g.nt_history_len > 0) {
2896 ret = samdb_msg_add_hashes(ldb, ac, msg,
2897 "ntPwdHistory",
2898 io.g.nt_history,
2899 io.g.nt_history_len);
2900 if (ret != LDB_SUCCESS) {
2901 return ret;
2902 }
2903 }
2904 if (io.g.lm_history_len > 0) {
2905 ret = samdb_msg_add_hashes(ldb, ac, msg,
2906 "lmPwdHistory",
2907 io.g.lm_history,
2908 io.g.lm_history_len);
2909 if (ret != LDB_SUCCESS) {
2910 return ret;
2911 }
2912 }
2913 if (io.g.supplemental.length > 0) {
2914 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2915 &io.g.supplemental, NULL);
2916 if (ret != LDB_SUCCESS) {
2917 return ret;
2918 }
2919 }
2920 ret = samdb_msg_add_uint64(ldb, ac, msg,
2921 "pwdLastSet",
2922 io.g.last_set);
2923 if (ret != LDB_SUCCESS) {
2924 return ret;
2925 }
2926
2927 ret = ldb_build_add_req(&down_req, ldb, ac,
2928 msg,
2929 ac->req->controls,
2930 ac, ph_op_callback,
2931 ac->req);
2932 LDB_REQ_SET_LOCATION(down_req);
2933 if (ret != LDB_SUCCESS) {
2934 return ret;
2935 }
2936
2937 return ldb_next_request(ac->module, down_req);
2938 }
2939
2940 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
2941 {
2942 struct ldb_context *ldb;
2943 struct ph_context *ac;
2944 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
2945 "unicodePwd", "dBCSPwd", NULL }, **l;
2946 unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
2947 struct ldb_message_element *passwordAttr;
2948 struct ldb_message *msg;
2949 struct ldb_request *down_req;
2950 int ret;
2951 struct ldb_control *bypass = NULL;
2952 bool userPassword = dsdb_user_password_support(module, req, req);
2953
2954 ldb = ldb_module_get_ctx(module);
2955
2956 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
2957
2958 if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
2959 return ldb_next_request(module, req);
2960 }
2961
2962 bypass = ldb_request_get_control(req,
2963 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2964 if (bypass != NULL) {
2965 /* Mark the "bypass" control as uncritical (done) */
2966 bypass->critical = false;
2967 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
2968 return password_hash_bypass(module, req);
2969 }
2970
2971 /* nobody must touch password histories and 'supplementalCredentials' */
2972 if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
2973 return LDB_ERR_UNWILLING_TO_PERFORM;
2974 }
2975 if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
2976 return LDB_ERR_UNWILLING_TO_PERFORM;
2977 }
2978 if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
2979 return LDB_ERR_UNWILLING_TO_PERFORM;
2980 }
2981
2982 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2983 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
2984 * For password changes/set there should be a 'delete' or a 'modify'
2985 * on these attributes. */
2986 attr_cnt = 0;
2987 for (l = passwordAttrs; *l != NULL; l++) {
2988 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
2989 continue;
2990 }
2991
2992 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
2993 /* MS-ADTS 3.1.1.3.1.5.2 */
2994 if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
2995 (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2996 return LDB_ERR_CONSTRAINT_VIOLATION;
2997 }
2998
2999 ++attr_cnt;
3000 }
3001 }
3002 if (attr_cnt == 0) {
3003 return ldb_next_request(module, req);
3004 }
3005
3006 ac = ph_init_context(module, req, userPassword);
3007 if (!ac) {
3008 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
3009 return ldb_operr(ldb);
3010 }
3011 ph_apply_controls(ac);
3012
3013 /* use a new message structure so that we can modify it */
3014 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
3015 if (msg == NULL) {
3016 return ldb_oom(ldb);
3017 }
3018
3019 /* - check for single-valued password attributes
3020 * (if not return "CONSTRAINT_VIOLATION")
3021 * - check that for a password change operation one add and one delete
3022 * operation exists
3023 * (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
3024 * - check that a password change and a password set operation cannot
3025 * be mixed
3026 * (if not return "UNWILLING_TO_PERFORM")
3027 * - remove all password attributes modifications from the first change
3028 * operation (anything without the passwords) - we will make the real
3029 * modification later */
3030 del_attr_cnt = 0;
3031 add_attr_cnt = 0;
3032 rep_attr_cnt = 0;
3033 for (l = passwordAttrs; *l != NULL; l++) {
3034 if ((!ac->userPassword) &&
3035 (ldb_attr_cmp(*l, "userPassword") == 0)) {
3036 continue;
3037 }
3038
3039 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
3040 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
3041 ++del_attr_cnt;
3042 }
3043 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
3044 ++add_attr_cnt;
3045 }
3046 if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
3047 ++rep_attr_cnt;
3048 }
3049 if ((passwordAttr->num_values != 1) &&
3050 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
3051 talloc_free(ac);
3052 ldb_asprintf_errstring(ldb,
3053 "'%s' attribute must have exactly one value on add operations!",
3054 *l);
3055 return LDB_ERR_CONSTRAINT_VIOLATION;
3056 }
3057 if ((passwordAttr->num_values > 1) &&
3058 (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
3059 talloc_free(ac);
3060 ldb_asprintf_errstring(ldb,
3061 "'%s' attribute must have zero or one value(s) on delete operations!",
3062 *l);
3063 return LDB_ERR_CONSTRAINT_VIOLATION;
3064 }
3065 ldb_msg_remove_element(msg, passwordAttr);
3066 }
3067 }
3068 if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
3069 talloc_free(ac);
3070 ldb_set_errstring(ldb,
3071 "Only the add action for a password change specified!");
3072 return LDB_ERR_UNWILLING_TO_PERFORM;
3073 }
3074 if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
3075 talloc_free(ac);
3076 ldb_set_errstring(ldb,
3077 "Only one delete and one add action for a password change allowed!");
3078 return LDB_ERR_UNWILLING_TO_PERFORM;
3079 }
3080 if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
3081 talloc_free(ac);
3082 ldb_set_errstring(ldb,
3083 "Either a password change or a password set operation is allowed!");
3084 return LDB_ERR_UNWILLING_TO_PERFORM;
3085 }
3086
3087 /* if there was nothing else to be modified skip to next step */
3088 if (msg->num_elements == 0) {
3089 return password_hash_mod_search_self(ac);
3090 }
3091
3092 ret = ldb_build_mod_req(&down_req, ldb, ac,
3093 msg,
3094 req->controls,
3095 ac, ph_modify_callback,
3096 req);
3097 LDB_REQ_SET_LOCATION(down_req);
3098 if (ret != LDB_SUCCESS) {
3099 return ret;
3100 }
3101
3102 return ldb_next_request(module, down_req);
3103 }
3104
3105 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3106 {
3107 struct ph_context *ac;
3108
3109 ac = talloc_get_type(req->context, struct ph_context);
3110
3111 if (!ares) {
3112 return ldb_module_done(ac->req, NULL, NULL,
3113 LDB_ERR_OPERATIONS_ERROR);
3114 }
3115
3116 if (ares->type == LDB_REPLY_REFERRAL) {
3117 return ldb_module_send_referral(ac->req, ares->referral);
3118 }
3119
3120 if (ares->error != LDB_SUCCESS) {
3121 return ldb_module_done(ac->req, ares->controls,
3122 ares->response, ares->error);
3123 }
3124
3125 if (ares->type != LDB_REPLY_DONE) {
3126 talloc_free(ares);
3127 return ldb_module_done(ac->req, NULL, NULL,
3128 LDB_ERR_OPERATIONS_ERROR);
3129 }
3130
3131 talloc_free(ares);
3132
3133 return password_hash_mod_search_self(ac);
3134 }
3135
3136 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
3137 {
3138 struct ldb_context *ldb;
3139 struct ph_context *ac;
3140 int ret;
3141
3142 ac = talloc_get_type(req->context, struct ph_context);
3143 ldb = ldb_module_get_ctx(ac->module);
3144
3145 if (!ares) {
3146 ret = LDB_ERR_OPERATIONS_ERROR;
3147 goto done;
3148 }
3149 if (ares->error != LDB_SUCCESS) {
3150 return ldb_module_done(ac->req, ares->controls,
3151 ares->response, ares->error);
3152 }
3153
3154 /* we are interested only in the single reply (base search) */
3155 switch (ares->type) {
3156 case LDB_REPLY_ENTRY:
3157 /* Make sure we are performing the password change action on a
3158 * (for us) valid object. Those are instances of either "user"
3159 * and/or "inetOrgPerson". Otherwise continue with the
3160 * submodules. */
3161 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
3162 && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
3163 talloc_free(ares);
3164
3165 if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
3166 ldb_set_errstring(ldb,
3167 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
3168 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
3169 goto done;
3170 }
3171
3172 ret = ldb_next_request(ac->module, ac->req);
3173 goto done;
3174 }
3175
3176 if (ac->search_res != NULL) {
3177 talloc_free(ares);
3178
3179 ldb_set_errstring(ldb, "Too many results");
3180 ret = LDB_ERR_OPERATIONS_ERROR;
3181 goto done;
3182 }
3183
3184 ac->search_res = talloc_steal(ac, ares);
3185 ret = LDB_SUCCESS;
3186 break;
3187
3188 case LDB_REPLY_REFERRAL:
3189 /* ignore anything else for now */
3190 talloc_free(ares);
3191 ret = LDB_SUCCESS;
3192 break;
3193
3194 case LDB_REPLY_DONE:
3195 talloc_free(ares);
3196
3197 /* get user domain data */
3198 ret = build_domain_data_request(ac);
3199 if (ret != LDB_SUCCESS) {
3200 return ldb_module_done(ac->req, NULL, NULL, ret);
3201 }
3202
3203 ret = ldb_next_request(ac->module, ac->dom_req);
3204 break;
3205 }
3206
3207 done:
3208 if (ret != LDB_SUCCESS) {
3209 return ldb_module_done(ac->req, NULL, NULL, ret);
3210 }
3211
3212 return LDB_SUCCESS;
3213 }
3214
3215 static int password_hash_mod_search_self(struct ph_context *ac)
3216 {
3217 struct ldb_context *ldb;
3218 static const char * const attrs[] = { "objectClass",
3219 "userAccountControl",
3220 "pwdLastSet",
3221 "sAMAccountName",
3222 "objectSid",
3223 "userPrincipalName",
3224 "supplementalCredentials",
3225 "lmPwdHistory",
3226 "ntPwdHistory",
3227 "dBCSPwd",
3228 "unicodePwd",
3229 NULL };
3230 struct ldb_request *search_req;
3231 int ret;
3232
3233 ldb = ldb_module_get_ctx(ac->module);
3234
3235 ret = ldb_build_search_req(&search_req, ldb, ac,
3236 ac->req->op.mod.message->dn,
3237 LDB_SCOPE_BASE,
3238 "(objectclass=*)",
3239 attrs,
3240 NULL,
3241 ac, ph_mod_search_callback,
3242 ac->req);
3243 LDB_REQ_SET_LOCATION(search_req);
3244 if (ret != LDB_SUCCESS) {
3245 return ret;
3246 }
3247
3248 return ldb_next_request(ac->module, search_req);
3249 }
3250
3251 static int password_hash_mod_do_mod(struct ph_context *ac)
3252 {
3253 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3254 struct loadparm_context *lp_ctx =
3255 talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
3256 struct loadparm_context);
3257 struct ldb_request *mod_req;
3258 struct ldb_message *msg;
3259 const struct ldb_message *orig_msg, *searched_msg;
3260 struct setup_password_fields_io io;
3261 int ret;
3262 NTSTATUS status;
3263
3264 /* use a new message structure so that we can modify it */
3265 msg = ldb_msg_new(ac);
3266 if (msg == NULL) {
3267 return ldb_operr(ldb);
3268 }
3269
3270 /* modify dn */
3271 msg->dn = ac->req->op.mod.message->dn;
3272
3273 orig_msg = ac->req->op.mod.message;
3274 searched_msg = ac->search_res->message;
3275
3276 /* Prepare the internal data structure containing the passwords */
3277 ret = setup_io(ac, orig_msg, searched_msg, &io);
3278 if (ret != LDB_SUCCESS) {
3279 return ret;
3280 }
3281
3282 /* Get the old password from the database */
3283 status = samdb_result_passwords(io.ac,
3284 lp_ctx,
3285 discard_const_p(struct ldb_message, searched_msg),
3286 &io.o.lm_hash, &io.o.nt_hash);
3287 if (!NT_STATUS_IS_OK(status)) {
3288 return ldb_operr(ldb);
3289 }
3290
3291 io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
3292 io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
3293 io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
3294
3295 ret = setup_password_fields(&io);
3296 if (ret != LDB_SUCCESS) {
3297 return ret;
3298 }
3299
3300 ret = check_password_restrictions(&io);
3301 if (ret != LDB_SUCCESS) {
3302 return ret;
3303 }
3304
3305 /* make sure we replace all the old attributes */
3306 ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
3307 ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
3308 ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3309 ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3310 ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
3311 ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
3312
3313 if (io.g.nt_hash) {
3314 ret = samdb_msg_add_hash(ldb, ac, msg,
3315 "unicodePwd", io.g.nt_hash);
3316 if (ret != LDB_SUCCESS) {
3317 return ret;
3318 }
3319 }
3320 if (io.g.lm_hash) {
3321 ret = samdb_msg_add_hash(ldb, ac, msg,
3322 "dBCSPwd", io.g.lm_hash);
3323 if (ret != LDB_SUCCESS) {
3324 return ret;
3325 }
3326 }
3327 if (io.g.nt_history_len > 0) {
3328 ret = samdb_msg_add_hashes(ldb, ac, msg,
3329 "ntPwdHistory",
3330 io.g.nt_history,
3331 io.g.nt_history_len);
3332 if (ret != LDB_SUCCESS) {
3333 return ret;
3334 }
3335 }
3336 if (io.g.lm_history_len > 0) {
3337 ret = samdb_msg_add_hashes(ldb, ac, msg,
3338 "lmPwdHistory",
3339 io.g.lm_history,
3340 io.g.lm_history_len);
3341 if (ret != LDB_SUCCESS) {
3342 return ret;
3343 }
3344 }
3345 if (io.g.supplemental.length > 0) {
3346 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3347 &io.g.supplemental, NULL);
3348 if (ret != LDB_SUCCESS) {
3349 return ret;
3350 }
3351 }
3352 ret = samdb_msg_add_uint64(ldb, ac, msg,
3353 "pwdLastSet",
3354 io.g.last_set);
3355 if (ret != LDB_SUCCESS) {
3356 return ret;
3357 }
3358
3359 ret = ldb_build_mod_req(&mod_req, ldb, ac,
3360 msg,
3361 ac->req->controls,
3362 ac, ph_op_callback,
3363 ac->req);
3364 LDB_REQ_SET_LOCATION(mod_req);
3365 if (ret != LDB_SUCCESS) {
3366 return ret;
3367 }
3368
3369 return ldb_next_request(ac->module, mod_req);
3370 }
3371
3372 static const struct ldb_module_ops ldb_password_hash_module_ops = {
3373 .name = "password_hash",
3374 .add = password_hash_add,
3375 .modify = password_hash_modify
3376 };
3377
3378 int ldb_password_hash_module_init(const char *version)
3379 {
3380 LDB_MODULE_CHECK_VERSION(version);
3381 return ldb_register_module(&ldb_password_hash_module_ops);
3382 }