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
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.
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.
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/>.
27 * Component: ldb password_hash module
29 * Description: correctly handle AD password changes fields
31 * Author: Andrew Bartlett
32 * Author: Stefan Metzmacher
36 #include "libcli/ldap/ldap_ndr.h"
37 #include "ldb_module.h"
38 #include "librpc/gen_ndr/misc.h"
39 #include "librpc/gen_ndr/samr.h"
40 #include "libcli/auth/libcli_auth.h"
41 #include "libcli/security/security.h"
42 #include "system/kerberos.h"
43 #include "auth/kerberos/kerberos.h"
44 #include "system/time.h"
45 #include "dsdb/samdb/samdb.h"
46 #include "../libds/common/flags.h"
47 #include "dsdb/samdb/ldb_modules/password_modules.h"
48 #include "librpc/ndr/libndr.h"
49 #include "librpc/gen_ndr/ndr_drsblobs.h"
50 #include "../lib/crypto/crypto.h"
51 #include "param/param.h"
53 /* If we have decided there is a reason to work on this request, then
54 * setup all the password hash types correctly.
56 * If we haven't the hashes yet but the password given as plain-text (attributes
57 * 'unicodePwd', 'userPassword' and 'clearTextPassword') we have to check for
58 * the constraints. Once this is done, we calculate the password hashes.
60 * Notice: unlike the real AD which only supports the UTF16 special based
61 * 'unicodePwd' and the UTF8 based 'userPassword' plaintext attribute we
62 * understand also a UTF16 based 'clearTextPassword' one.
63 * The latter is also accessible through LDAP so it can also be set by external
64 * tools and scripts. But be aware that this isn't portable on non SAMBA 4 ADs!
66 * Also when the module receives only the password hashes (possible through
67 * specifying an internal LDB control - for security reasons) some checks are
68 * performed depending on the operation mode (see below) (e.g. if the password
69 * has been in use before if the password memory policy was activated).
71 * Attention: There is a difference between "modify" and "reset" operations
72 * (see MS-ADTS 3.1.1.3.1.5). If the client sends a "add" and "remove"
73 * operation for a password attribute we thread this as a "modify"; if it sends
74 * only a "replace" one we have an (administrative) reset.
76 * Finally, if the administrator has requested that a password history
77 * be maintained, then this should also be written out.
81 /* TODO: [consider always MS-ADTS 3.1.1.3.1.5]
82 * - Check for right connection encryption
85 /* Notice: Definition of "dsdb_control_password_change_status" moved into
89 struct ldb_module *module;
90 struct ldb_request *req;
92 struct ldb_request *dom_req;
93 struct ldb_reply *dom_res;
95 struct ldb_reply *search_res;
97 struct dsdb_control_password_change_status *status;
103 bool change_old_pw_checked;
107 struct setup_password_fields_io {
108 struct ph_context *ac;
110 struct smb_krb5_context *smb_krb5_context;
112 /* infos about the user account */
114 uint32_t userAccountControl;
116 const char *sAMAccountName;
117 const char *user_principal_name;
119 uint32_t restrictions;
122 /* new credentials and old given credentials */
123 struct setup_password_fields_given {
124 const struct ldb_val *cleartext_utf8;
125 const struct ldb_val *cleartext_utf16;
126 struct samr_Password *nt_hash;
127 struct samr_Password *lm_hash;
130 /* old credentials */
132 struct samr_Password *nt_hash;
133 struct samr_Password *lm_hash;
134 uint32_t nt_history_len;
135 struct samr_Password *nt_history;
136 uint32_t lm_history_len;
137 struct samr_Password *lm_history;
138 const struct ldb_val *supplemental;
139 struct supplementalCredentialsBlob scb;
142 /* generated credentials */
144 struct samr_Password *nt_hash;
145 struct samr_Password *lm_hash;
146 uint32_t nt_history_len;
147 struct samr_Password *nt_history;
148 uint32_t lm_history_len;
149 struct samr_Password *lm_history;
155 struct ldb_val supplemental;
160 /* Get the NT hash, and fill it in as an entry in the password history,
161 and specify it into io->g.nt_hash */
163 static int setup_nt_fields(struct setup_password_fields_io *io)
165 struct ldb_context *ldb;
168 io->g.nt_hash = io->n.nt_hash;
169 ldb = ldb_module_get_ctx(io->ac->module);
171 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
175 /* We might not have an old NT password */
176 io->g.nt_history = talloc_array(io->ac,
177 struct samr_Password,
178 io->ac->status->domain_data.pwdHistoryLength);
179 if (!io->g.nt_history) {
183 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
184 io->o.nt_history_len); i++) {
185 io->g.nt_history[i+1] = io->o.nt_history[i];
187 io->g.nt_history_len = i + 1;
190 io->g.nt_history[0] = *io->g.nt_hash;
193 * TODO: is this correct?
194 * the simular behavior is correct for the lm history case
196 E_md4hash("", io->g.nt_history[0].hash);
202 /* Get the LANMAN hash, and fill it in as an entry in the password history,
203 and specify it into io->g.lm_hash */
205 static int setup_lm_fields(struct setup_password_fields_io *io)
207 struct ldb_context *ldb;
210 io->g.lm_hash = io->n.lm_hash;
211 ldb = ldb_module_get_ctx(io->ac->module);
213 if (io->ac->status->domain_data.pwdHistoryLength == 0) {
217 /* We might not have an old LM password */
218 io->g.lm_history = talloc_array(io->ac,
219 struct samr_Password,
220 io->ac->status->domain_data.pwdHistoryLength);
221 if (!io->g.lm_history) {
225 for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
226 io->o.lm_history_len); i++) {
227 io->g.lm_history[i+1] = io->o.lm_history[i];
229 io->g.lm_history_len = i + 1;
232 io->g.lm_history[0] = *io->g.lm_hash;
234 E_deshash("", io->g.lm_history[0].hash);
240 static int setup_kerberos_keys(struct setup_password_fields_io *io)
242 struct ldb_context *ldb;
243 krb5_error_code krb5_ret;
244 Principal *salt_principal;
247 krb5_data cleartext_data;
249 ldb = ldb_module_get_ctx(io->ac->module);
250 cleartext_data.data = io->n.cleartext_utf8->data;
251 cleartext_data.length = io->n.cleartext_utf8->length;
253 /* Many, many thanks to lukeh@padl.com for this
254 * algorithm, described in his Nov 10 2004 mail to
255 * samba-technical@samba.org */
258 * Determine a salting principal
260 if (io->u.is_computer) {
264 name = strlower_talloc(io->ac, io->u.sAMAccountName);
269 if (name[strlen(name)-1] == '$') {
270 name[strlen(name)-1] = '\0';
273 saltbody = talloc_asprintf(io->ac, "%s.%s", name,
274 io->ac->status->domain_data.dns_domain);
279 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
281 io->ac->status->domain_data.realm,
282 "host", saltbody, NULL);
283 } else if (io->u.user_principal_name) {
284 char *user_principal_name;
287 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
288 if (!user_principal_name) {
292 p = strchr(user_principal_name, '@');
297 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
299 io->ac->status->domain_data.realm,
300 user_principal_name, NULL);
302 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
304 io->ac->status->domain_data.realm,
305 io->u.sAMAccountName, NULL);
308 ldb_asprintf_errstring(ldb,
309 "setup_kerberos_keys: "
310 "generation of a salting principal failed: %s",
311 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
313 return LDB_ERR_OPERATIONS_ERROR;
317 * create salt from salt_principal
319 krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
320 salt_principal, &salt);
321 krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
323 ldb_asprintf_errstring(ldb,
324 "setup_kerberos_keys: "
325 "generation of krb5_salt failed: %s",
326 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
328 return LDB_ERR_OPERATIONS_ERROR;
330 /* create a talloc copy */
331 io->g.salt = talloc_strndup(io->ac,
332 (char *)salt.saltvalue.data,
333 salt.saltvalue.length);
334 krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
338 salt.saltvalue.data = discard_const(io->g.salt);
339 salt.saltvalue.length = strlen(io->g.salt);
342 * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
343 * the salt and the cleartext password
345 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
346 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
351 ldb_asprintf_errstring(ldb,
352 "setup_kerberos_keys: "
353 "generation of a aes256-cts-hmac-sha1-96 key failed: %s",
354 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
356 return LDB_ERR_OPERATIONS_ERROR;
358 io->g.aes_256 = data_blob_talloc(io->ac,
360 key.keyvalue.length);
361 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
362 if (!io->g.aes_256.data) {
367 * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of
368 * the salt and the cleartext password
370 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
371 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
376 ldb_asprintf_errstring(ldb,
377 "setup_kerberos_keys: "
378 "generation of a aes128-cts-hmac-sha1-96 key failed: %s",
379 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
381 return LDB_ERR_OPERATIONS_ERROR;
383 io->g.aes_128 = data_blob_talloc(io->ac,
385 key.keyvalue.length);
386 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
387 if (!io->g.aes_128.data) {
392 * create ENCTYPE_DES_CBC_MD5 key out of
393 * the salt and the cleartext password
395 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
401 ldb_asprintf_errstring(ldb,
402 "setup_kerberos_keys: "
403 "generation of a des-cbc-md5 key failed: %s",
404 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
406 return LDB_ERR_OPERATIONS_ERROR;
408 io->g.des_md5 = data_blob_talloc(io->ac,
410 key.keyvalue.length);
411 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
412 if (!io->g.des_md5.data) {
417 * create ENCTYPE_DES_CBC_CRC key out of
418 * the salt and the cleartext password
420 krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
426 ldb_asprintf_errstring(ldb,
427 "setup_kerberos_keys: "
428 "generation of a des-cbc-crc key failed: %s",
429 smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
431 return LDB_ERR_OPERATIONS_ERROR;
433 io->g.des_crc = data_blob_talloc(io->ac,
435 key.keyvalue.length);
436 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
437 if (!io->g.des_crc.data) {
444 static int setup_primary_kerberos(struct setup_password_fields_io *io,
445 const struct supplementalCredentialsBlob *old_scb,
446 struct package_PrimaryKerberosBlob *pkb)
448 struct ldb_context *ldb;
449 struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
450 struct supplementalCredentialsPackage *old_scp = NULL;
451 struct package_PrimaryKerberosBlob _old_pkb;
452 struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
454 enum ndr_err_code ndr_err;
456 ldb = ldb_module_get_ctx(io->ac->module);
459 * prepare generation of keys
461 * ENCTYPE_DES_CBC_MD5
462 * ENCTYPE_DES_CBC_CRC
465 pkb3->salt.string = io->g.salt;
467 pkb3->keys = talloc_array(io->ac,
468 struct package_PrimaryKerberosKey3,
474 pkb3->keys[0].keytype = ENCTYPE_DES_CBC_MD5;
475 pkb3->keys[0].value = &io->g.des_md5;
476 pkb3->keys[1].keytype = ENCTYPE_DES_CBC_CRC;
477 pkb3->keys[1].value = &io->g.des_crc;
479 /* initialize the old keys to zero */
480 pkb3->num_old_keys = 0;
481 pkb3->old_keys = NULL;
483 /* if there're no old keys, then we're done */
488 for (i=0; i < old_scb->sub.num_packages; i++) {
489 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
493 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
497 old_scp = &old_scb->sub.packages[i];
500 /* Primary:Kerberos element of supplementalCredentials */
504 blob = strhex_to_data_blob(io->ac, old_scp->data);
509 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
510 ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
511 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
512 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
513 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
514 ldb_asprintf_errstring(ldb,
515 "setup_primary_kerberos: "
516 "failed to pull old package_PrimaryKerberosBlob: %s",
518 return LDB_ERR_OPERATIONS_ERROR;
521 if (_old_pkb.version != 3) {
522 ldb_asprintf_errstring(ldb,
523 "setup_primary_kerberos: "
524 "package_PrimaryKerberosBlob version[%u] expected[3]",
526 return LDB_ERR_OPERATIONS_ERROR;
529 old_pkb3 = &_old_pkb.ctr.ctr3;
532 /* if we didn't found the old keys we're done */
537 /* fill in the old keys */
538 pkb3->num_old_keys = old_pkb3->num_keys;
539 pkb3->old_keys = old_pkb3->keys;
544 static int setup_primary_kerberos_newer(struct setup_password_fields_io *io,
545 const struct supplementalCredentialsBlob *old_scb,
546 struct package_PrimaryKerberosBlob *pkb)
548 struct ldb_context *ldb;
549 struct package_PrimaryKerberosCtr4 *pkb4 = &pkb->ctr.ctr4;
550 struct supplementalCredentialsPackage *old_scp = NULL;
551 struct package_PrimaryKerberosBlob _old_pkb;
552 struct package_PrimaryKerberosCtr4 *old_pkb4 = NULL;
554 enum ndr_err_code ndr_err;
556 ldb = ldb_module_get_ctx(io->ac->module);
559 * prepare generation of keys
561 * ENCTYPE_AES256_CTS_HMAC_SHA1_96
562 * ENCTYPE_AES128_CTS_HMAC_SHA1_96
563 * ENCTYPE_DES_CBC_MD5
564 * ENCTYPE_DES_CBC_CRC
567 pkb4->salt.string = io->g.salt;
568 pkb4->default_iteration_count = 4096;
571 pkb4->keys = talloc_array(io->ac,
572 struct package_PrimaryKerberosKey4,
578 pkb4->keys[0].iteration_count = 4096;
579 pkb4->keys[0].keytype = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
580 pkb4->keys[0].value = &io->g.aes_256;
581 pkb4->keys[1].iteration_count = 4096;
582 pkb4->keys[1].keytype = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
583 pkb4->keys[1].value = &io->g.aes_128;
584 pkb4->keys[2].iteration_count = 4096;
585 pkb4->keys[2].keytype = ENCTYPE_DES_CBC_MD5;
586 pkb4->keys[2].value = &io->g.des_md5;
587 pkb4->keys[3].iteration_count = 4096;
588 pkb4->keys[3].keytype = ENCTYPE_DES_CBC_CRC;
589 pkb4->keys[3].value = &io->g.des_crc;
591 /* initialize the old keys to zero */
592 pkb4->num_old_keys = 0;
593 pkb4->old_keys = NULL;
594 pkb4->num_older_keys = 0;
595 pkb4->older_keys = NULL;
597 /* if there're no old keys, then we're done */
602 for (i=0; i < old_scb->sub.num_packages; i++) {
603 if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) {
607 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
611 old_scp = &old_scb->sub.packages[i];
614 /* Primary:Kerberos-Newer-Keys element of supplementalCredentials */
618 blob = strhex_to_data_blob(io->ac, old_scp->data);
623 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
624 ndr_err = ndr_pull_struct_blob(&blob, io->ac,
626 (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
627 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
628 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
629 ldb_asprintf_errstring(ldb,
630 "setup_primary_kerberos_newer: "
631 "failed to pull old package_PrimaryKerberosBlob: %s",
633 return LDB_ERR_OPERATIONS_ERROR;
636 if (_old_pkb.version != 4) {
637 ldb_asprintf_errstring(ldb,
638 "setup_primary_kerberos_newer: "
639 "package_PrimaryKerberosBlob version[%u] expected[4]",
641 return LDB_ERR_OPERATIONS_ERROR;
644 old_pkb4 = &_old_pkb.ctr.ctr4;
647 /* if we didn't found the old keys we're done */
652 /* fill in the old keys */
653 pkb4->num_old_keys = old_pkb4->num_keys;
654 pkb4->old_keys = old_pkb4->keys;
655 pkb4->num_older_keys = old_pkb4->num_old_keys;
656 pkb4->older_keys = old_pkb4->old_keys;
661 static int setup_primary_wdigest(struct setup_password_fields_io *io,
662 const struct supplementalCredentialsBlob *old_scb,
663 struct package_PrimaryWDigestBlob *pdb)
665 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
666 DATA_BLOB sAMAccountName;
667 DATA_BLOB sAMAccountName_l;
668 DATA_BLOB sAMAccountName_u;
669 const char *user_principal_name = io->u.user_principal_name;
670 DATA_BLOB userPrincipalName;
671 DATA_BLOB userPrincipalName_l;
672 DATA_BLOB userPrincipalName_u;
673 DATA_BLOB netbios_domain;
674 DATA_BLOB netbios_domain_l;
675 DATA_BLOB netbios_domain_u;
676 DATA_BLOB dns_domain;
677 DATA_BLOB dns_domain_l;
678 DATA_BLOB dns_domain_u;
690 * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
691 * for what precalculated hashes are supposed to be stored...
693 * I can't reproduce all values which should contain "Digest" as realm,
694 * am I doing something wrong or is w2k3 just broken...?
696 * W2K3 fills in following for a user:
698 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
699 * sAMAccountName: NewUser2Sam
700 * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
702 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
703 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
704 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
705 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
706 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
707 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
708 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
709 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
710 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
711 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
712 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
713 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
714 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
715 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
716 * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
717 * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
718 * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
719 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
720 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
721 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
722 * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
723 * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
724 * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
725 * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
726 * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
727 * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
728 * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
729 * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
730 * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
732 * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
733 * sAMAccountName: NewUser2Sam
735 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
736 * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
737 * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
738 * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
739 * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
740 * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
741 * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
742 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
743 * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
744 * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
745 * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
746 * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
747 * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
748 * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
749 * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
750 * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
751 * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
752 * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
753 * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
754 * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
755 * 31dc704d3640335b2123d4ee28aa1f11 => ???M1 changes with NewUser2Sam => NewUser1Sam
756 * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
757 * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
758 * 569b4533f2d9e580211dd040e5e360a8 => ???M2 changes with NewUser2Princ => NewUser1Princ
759 * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
760 * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
761 * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
762 * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
763 * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
767 * sAMAccountName, netbios_domain
770 .user = &sAMAccountName,
771 .realm = &netbios_domain,
774 .user = &sAMAccountName_l,
775 .realm = &netbios_domain_l,
778 .user = &sAMAccountName_u,
779 .realm = &netbios_domain_u,
782 .user = &sAMAccountName,
783 .realm = &netbios_domain_u,
786 .user = &sAMAccountName,
787 .realm = &netbios_domain_l,
790 .user = &sAMAccountName_u,
791 .realm = &netbios_domain_l,
794 .user = &sAMAccountName_l,
795 .realm = &netbios_domain_u,
798 * sAMAccountName, dns_domain
801 .user = &sAMAccountName,
802 .realm = &dns_domain,
805 .user = &sAMAccountName_l,
806 .realm = &dns_domain_l,
809 .user = &sAMAccountName_u,
810 .realm = &dns_domain_u,
813 .user = &sAMAccountName,
814 .realm = &dns_domain_u,
817 .user = &sAMAccountName,
818 .realm = &dns_domain_l,
821 .user = &sAMAccountName_u,
822 .realm = &dns_domain_l,
825 .user = &sAMAccountName_l,
826 .realm = &dns_domain_u,
829 * userPrincipalName, no realm
832 .user = &userPrincipalName,
836 * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
837 * the fallback to the sAMAccountName based userPrincipalName is correct
839 .user = &userPrincipalName_l,
842 .user = &userPrincipalName_u,
845 * nt4dom\sAMAccountName, no realm
848 .user = &sAMAccountName,
849 .nt4dom = &netbios_domain
852 .user = &sAMAccountName_l,
853 .nt4dom = &netbios_domain_l
856 .user = &sAMAccountName_u,
857 .nt4dom = &netbios_domain_u
861 * the following ones are guessed depending on the technet2 article
862 * but not reproducable on a w2k3 server
864 /* sAMAccountName with "Digest" realm */
866 .user = &sAMAccountName,
870 .user = &sAMAccountName_l,
874 .user = &sAMAccountName_u,
877 /* userPrincipalName with "Digest" realm */
879 .user = &userPrincipalName,
883 .user = &userPrincipalName_l,
887 .user = &userPrincipalName_u,
890 /* nt4dom\\sAMAccountName with "Digest" realm */
892 .user = &sAMAccountName,
893 .nt4dom = &netbios_domain,
897 .user = &sAMAccountName_l,
898 .nt4dom = &netbios_domain_l,
902 .user = &sAMAccountName_u,
903 .nt4dom = &netbios_domain_u,
908 /* prepare DATA_BLOB's used in the combinations array */
909 sAMAccountName = data_blob_string_const(io->u.sAMAccountName);
910 sAMAccountName_l = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
911 if (!sAMAccountName_l.data) {
914 sAMAccountName_u = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
915 if (!sAMAccountName_u.data) {
919 /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
920 if (!user_principal_name) {
921 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
922 io->u.sAMAccountName,
923 io->ac->status->domain_data.dns_domain);
924 if (!user_principal_name) {
928 userPrincipalName = data_blob_string_const(user_principal_name);
929 userPrincipalName_l = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
930 if (!userPrincipalName_l.data) {
933 userPrincipalName_u = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
934 if (!userPrincipalName_u.data) {
938 netbios_domain = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
939 netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac,
940 io->ac->status->domain_data.netbios_domain));
941 if (!netbios_domain_l.data) {
944 netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac,
945 io->ac->status->domain_data.netbios_domain));
946 if (!netbios_domain_u.data) {
950 dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
951 dns_domain_l = data_blob_string_const(io->ac->status->domain_data.dns_domain);
952 dns_domain_u = data_blob_string_const(io->ac->status->domain_data.realm);
954 digest = data_blob_string_const("Digest");
956 delim = data_blob_string_const(":");
957 backslash = data_blob_string_const("\\");
959 pdb->num_hashes = ARRAY_SIZE(wdigest);
960 pdb->hashes = talloc_array(io->ac, struct package_PrimaryWDigestHash,
966 for (i=0; i < ARRAY_SIZE(wdigest); i++) {
967 struct MD5Context md5;
969 if (wdigest[i].nt4dom) {
970 MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
971 MD5Update(&md5, backslash.data, backslash.length);
973 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
974 MD5Update(&md5, delim.data, delim.length);
975 if (wdigest[i].realm) {
976 MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
978 MD5Update(&md5, delim.data, delim.length);
979 MD5Update(&md5, io->n.cleartext_utf8->data, io->n.cleartext_utf8->length);
980 MD5Final(pdb->hashes[i].hash, &md5);
986 static int setup_supplemental_field(struct setup_password_fields_io *io)
988 struct ldb_context *ldb;
989 struct supplementalCredentialsBlob scb;
990 struct supplementalCredentialsBlob _old_scb;
991 struct supplementalCredentialsBlob *old_scb = NULL;
992 /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */
993 uint32_t num_names = 0;
994 const char *names[1+4];
995 uint32_t num_packages = 0;
996 struct supplementalCredentialsPackage packages[1+4];
998 struct supplementalCredentialsPackage *pp = NULL;
999 struct package_PackagesBlob pb;
1002 /* Primary:Kerberos-Newer-Keys */
1003 const char **nkn = NULL;
1004 struct supplementalCredentialsPackage *pkn = NULL;
1005 struct package_PrimaryKerberosBlob pknb;
1006 DATA_BLOB pknb_blob;
1008 /* Primary:Kerberos */
1009 const char **nk = NULL;
1010 struct supplementalCredentialsPackage *pk = NULL;
1011 struct package_PrimaryKerberosBlob pkb;
1014 /* Primary:WDigest */
1015 const char **nd = NULL;
1016 struct supplementalCredentialsPackage *pd = NULL;
1017 struct package_PrimaryWDigestBlob pdb;
1020 /* Primary:CLEARTEXT */
1021 const char **nc = NULL;
1022 struct supplementalCredentialsPackage *pc = NULL;
1023 struct package_PrimaryCLEARTEXTBlob pcb;
1027 enum ndr_err_code ndr_err;
1029 bool do_newer_keys = false;
1030 bool do_cleartext = false;
1032 ZERO_STRUCT(zero16);
1035 ldb = ldb_module_get_ctx(io->ac->module);
1037 if (!io->n.cleartext_utf8) {
1039 * when we don't have a cleartext password
1040 * we can't setup a supplementalCredential value
1045 /* if there's an old supplementaCredentials blob then parse it */
1046 if (io->o.supplemental) {
1047 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
1049 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
1050 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1051 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1052 ldb_asprintf_errstring(ldb,
1053 "setup_supplemental_field: "
1054 "failed to pull old supplementalCredentialsBlob: %s",
1056 return LDB_ERR_OPERATIONS_ERROR;
1059 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
1060 old_scb = &_old_scb;
1062 ldb_debug(ldb, LDB_DEBUG_ERROR,
1063 "setup_supplemental_field: "
1064 "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
1065 _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
1068 /* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
1069 do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
1071 if (io->ac->status->domain_data.store_cleartext &&
1072 (io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
1073 do_cleartext = true;
1077 * The ordering is this
1079 * Primary:Kerberos-Newer-Keys (optional)
1082 * Primary:CLEARTEXT (optional)
1084 * And the 'Packages' package is insert before the last
1087 if (do_newer_keys) {
1088 /* Primary:Kerberos-Newer-Keys */
1089 nkn = &names[num_names++];
1090 pkn = &packages[num_packages++];
1093 /* Primary:Kerberos */
1094 nk = &names[num_names++];
1095 pk = &packages[num_packages++];
1097 if (!do_cleartext) {
1099 pp = &packages[num_packages++];
1102 /* Primary:WDigest */
1103 nd = &names[num_names++];
1104 pd = &packages[num_packages++];
1108 pp = &packages[num_packages++];
1110 /* Primary:CLEARTEXT */
1111 nc = &names[num_names++];
1112 pc = &packages[num_packages++];
1117 * setup 'Primary:Kerberos-Newer-Keys' element
1119 *nkn = "Kerberos-Newer-Keys";
1121 ret = setup_primary_kerberos_newer(io, old_scb, &pknb);
1122 if (ret != LDB_SUCCESS) {
1126 ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
1128 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1129 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1130 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1131 ldb_asprintf_errstring(ldb,
1132 "setup_supplemental_field: "
1133 "failed to push package_PrimaryKerberosNeverBlob: %s",
1135 return LDB_ERR_OPERATIONS_ERROR;
1137 pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
1139 return ldb_oom(ldb);
1141 pkn->name = "Primary:Kerberos-Newer-Keys";
1143 pkn->data = pknb_hexstr;
1147 * setup 'Primary:Kerberos' element
1151 ret = setup_primary_kerberos(io, old_scb, &pkb);
1152 if (ret != LDB_SUCCESS) {
1156 ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
1158 (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1159 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1160 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1161 ldb_asprintf_errstring(ldb,
1162 "setup_supplemental_field: "
1163 "failed to push package_PrimaryKerberosBlob: %s",
1165 return LDB_ERR_OPERATIONS_ERROR;
1167 pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
1169 return ldb_oom(ldb);
1171 pk->name = "Primary:Kerberos";
1173 pk->data = pkb_hexstr;
1176 * setup 'Primary:WDigest' element
1180 ret = setup_primary_wdigest(io, old_scb, &pdb);
1181 if (ret != LDB_SUCCESS) {
1185 ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
1187 (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
1188 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1189 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1190 ldb_asprintf_errstring(ldb,
1191 "setup_supplemental_field: "
1192 "failed to push package_PrimaryWDigestBlob: %s",
1194 return LDB_ERR_OPERATIONS_ERROR;
1196 pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
1198 return ldb_oom(ldb);
1200 pd->name = "Primary:WDigest";
1202 pd->data = pdb_hexstr;
1205 * setup 'Primary:CLEARTEXT' element
1210 pcb.cleartext = *io->n.cleartext_utf16;
1212 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
1214 (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
1215 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1216 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1217 ldb_asprintf_errstring(ldb,
1218 "setup_supplemental_field: "
1219 "failed to push package_PrimaryCLEARTEXTBlob: %s",
1221 return LDB_ERR_OPERATIONS_ERROR;
1223 pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
1225 return ldb_oom(ldb);
1227 pc->name = "Primary:CLEARTEXT";
1229 pc->data = pcb_hexstr;
1233 * setup 'Packages' element
1236 ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1238 (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1239 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1240 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1241 ldb_asprintf_errstring(ldb,
1242 "setup_supplemental_field: "
1243 "failed to push package_PackagesBlob: %s",
1245 return LDB_ERR_OPERATIONS_ERROR;
1247 pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
1249 return ldb_oom(ldb);
1251 pp->name = "Packages";
1253 pp->data = pb_hexstr;
1256 * setup 'supplementalCredentials' value
1259 scb.sub.num_packages = num_packages;
1260 scb.sub.packages = packages;
1262 ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1264 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1265 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1266 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1267 ldb_asprintf_errstring(ldb,
1268 "setup_supplemental_field: "
1269 "failed to push supplementalCredentialsBlob: %s",
1271 return LDB_ERR_OPERATIONS_ERROR;
1277 static int setup_last_set_field(struct setup_password_fields_io *io)
1280 unix_to_nt_time(&io->g.last_set, time(NULL));
1285 static int setup_given_passwords(struct setup_password_fields_io *io,
1286 struct setup_password_fields_given *g)
1288 struct ldb_context *ldb;
1291 ldb = ldb_module_get_ctx(io->ac->module);
1293 if (g->cleartext_utf8) {
1294 char **cleartext_utf16_str;
1295 struct ldb_val *cleartext_utf16_blob;
1296 size_t converted_pw_len;
1298 cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
1299 if (!cleartext_utf16_blob) {
1300 return ldb_oom(ldb);
1302 if (!convert_string_talloc(io->ac,
1304 g->cleartext_utf8->data,
1305 g->cleartext_utf8->length,
1306 (void *)&cleartext_utf16_str,
1307 &converted_pw_len, false)) {
1308 ldb_asprintf_errstring(ldb,
1309 "setup_password_fields: "
1310 "failed to generate UTF16 password from cleartext UTF8 password");
1311 return LDB_ERR_OPERATIONS_ERROR;
1313 *cleartext_utf16_blob = data_blob_const(cleartext_utf16_str,
1315 g->cleartext_utf16 = cleartext_utf16_blob;
1316 } else if (g->cleartext_utf16) {
1317 char *cleartext_utf8_str;
1318 struct ldb_val *cleartext_utf8_blob;
1319 size_t converted_pw_len;
1321 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
1322 if (!cleartext_utf8_blob) {
1323 return ldb_oom(ldb);
1325 if (!convert_string_talloc(io->ac,
1326 CH_UTF16MUNGED, CH_UTF8,
1327 g->cleartext_utf16->data,
1328 g->cleartext_utf16->length,
1329 (void *)&cleartext_utf8_str,
1330 &converted_pw_len, false)) {
1331 /* We can't bail out entirely, as these unconvertable passwords are frustratingly valid */
1332 talloc_free(cleartext_utf8_blob);
1334 *cleartext_utf8_blob = data_blob_const(cleartext_utf8_str,
1336 g->cleartext_utf8 = cleartext_utf8_blob;
1340 if (g->cleartext_utf16) {
1341 struct samr_Password *nt_hash;
1343 nt_hash = talloc(io->ac, struct samr_Password);
1345 return ldb_oom(ldb);
1347 g->nt_hash = nt_hash;
1349 /* compute the new nt hash */
1350 mdfour(nt_hash->hash,
1351 g->cleartext_utf16->data,
1352 g->cleartext_utf16->length);
1355 if (g->cleartext_utf8) {
1356 struct samr_Password *lm_hash;
1358 lm_hash = talloc(io->ac, struct samr_Password);
1360 return ldb_oom(ldb);
1363 /* compute the new lm hash */
1364 ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
1366 g->lm_hash = lm_hash;
1368 talloc_free(lm_hash);
1375 static int setup_password_fields(struct setup_password_fields_io *io)
1377 struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1378 struct loadparm_context *lp_ctx =
1379 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1380 struct loadparm_context);
1383 /* transform the old password (for password changes) */
1384 ret = setup_given_passwords(io, &io->og);
1385 if (ret != LDB_SUCCESS) {
1389 /* transform the new password */
1390 ret = setup_given_passwords(io, &io->n);
1391 if (ret != LDB_SUCCESS) {
1395 if (io->n.cleartext_utf8) {
1396 ret = setup_kerberos_keys(io);
1397 if (ret != LDB_SUCCESS) {
1402 ret = setup_nt_fields(io);
1403 if (ret != LDB_SUCCESS) {
1407 if (lpcfg_lanman_auth(lp_ctx)) {
1408 ret = setup_lm_fields(io);
1409 if (ret != LDB_SUCCESS) {
1413 io->g.lm_hash = NULL;
1414 io->g.lm_history_len = 0;
1417 ret = setup_supplemental_field(io);
1418 if (ret != LDB_SUCCESS) {
1422 ret = setup_last_set_field(io);
1423 if (ret != LDB_SUCCESS) {
1430 static int check_password_restrictions(struct setup_password_fields_io *io)
1432 struct ldb_context *ldb;
1434 enum samr_ValidationStatus stat;
1436 ldb = ldb_module_get_ctx(io->ac->module);
1438 /* First check the old password is correct, for password changes */
1439 if (!io->ac->pwd_reset && !io->ac->change_old_pw_checked) {
1440 bool nt_hash_checked = false;
1442 /* we need the old nt or lm hash given by the client */
1443 if (!io->og.nt_hash && !io->og.lm_hash) {
1444 ldb_asprintf_errstring(ldb,
1445 "check_password_restrictions: "
1446 "You need to provide the old password in order "
1448 return LDB_ERR_UNWILLING_TO_PERFORM;
1451 /* The password modify through the NT hash is encouraged and
1452 has no problems at all */
1453 if (io->og.nt_hash) {
1454 if (!io->o.nt_hash) {
1455 ldb_asprintf_errstring(ldb,
1456 "check_password_restrictions: "
1457 "There's no old nt_hash, which is needed "
1458 "in order to change your password!");
1459 return LDB_ERR_CONSTRAINT_VIOLATION;
1462 if (memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
1463 ldb_asprintf_errstring(ldb,
1464 "check_password_restrictions: "
1465 "The old password specified doesn't match!");
1466 return LDB_ERR_CONSTRAINT_VIOLATION;
1469 nt_hash_checked = true;
1472 /* But it is also possible to change a password by the LM hash
1473 * alone for compatibility reasons. This check is optional if
1474 * the NT hash was already checked - otherwise it's mandatory.
1475 * (as the SAMR operations request it). */
1476 if (io->og.lm_hash) {
1477 if (!io->o.lm_hash && !nt_hash_checked) {
1478 ldb_asprintf_errstring(ldb,
1479 "check_password_restrictions: "
1480 "There's no old lm_hash, which is needed "
1481 "in order to change your password!");
1482 return LDB_ERR_CONSTRAINT_VIOLATION;
1485 if (io->o.lm_hash &&
1486 memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0) {
1487 ldb_asprintf_errstring(ldb,
1488 "check_password_restrictions: "
1489 "The old password specified doesn't match!");
1490 return LDB_ERR_CONSTRAINT_VIOLATION;
1495 if (io->u.restrictions == 0) {
1496 /* FIXME: Is this right? */
1501 * Fundamental password checks done by the call
1502 * "samdb_check_password".
1503 * It is also in use by "dcesrv_samr_ValidatePassword".
1505 if (io->n.cleartext_utf8 != NULL) {
1506 stat = samdb_check_password(io->n.cleartext_utf8,
1507 io->ac->status->domain_data.pwdProperties,
1508 io->ac->status->domain_data.minPwdLength);
1510 case SAMR_VALIDATION_STATUS_SUCCESS:
1511 /* perfect -> proceed! */
1514 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
1515 ldb_asprintf_errstring(ldb,
1516 "check_password_restrictions: "
1517 "the password is too short. It should be equal or longer than %i characters!",
1518 io->ac->status->domain_data.minPwdLength);
1520 io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
1521 return LDB_ERR_CONSTRAINT_VIOLATION;
1523 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
1524 ldb_asprintf_errstring(ldb,
1525 "check_password_restrictions: "
1526 "the password does not meet the complexity criterias!");
1527 io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
1529 return LDB_ERR_CONSTRAINT_VIOLATION;
1532 ldb_asprintf_errstring(ldb,
1533 "check_password_restrictions: "
1534 "the password doesn't fit by a certain reason!");
1536 return LDB_ERR_CONSTRAINT_VIOLATION;
1540 if (io->ac->pwd_reset) {
1544 if (io->n.nt_hash) {
1547 /* checks the NT hash password history */
1548 for (i = 0; i < io->o.nt_history_len; i++) {
1549 ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
1551 ldb_asprintf_errstring(ldb,
1552 "check_password_restrictions: "
1553 "the password was already used (in history)!");
1555 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
1557 return LDB_ERR_CONSTRAINT_VIOLATION;
1562 if (io->n.lm_hash) {
1565 /* checks the LM hash password history */
1566 for (i = 0; i < io->o.lm_history_len; i++) {
1567 ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
1569 ldb_asprintf_errstring(ldb,
1570 "check_password_restrictions: "
1571 "the password was already used (in history)!");
1573 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
1575 return LDB_ERR_CONSTRAINT_VIOLATION;
1580 /* are all password changes disallowed? */
1581 if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
1582 ldb_asprintf_errstring(ldb,
1583 "check_password_restrictions: "
1584 "password changes disabled!");
1585 return LDB_ERR_CONSTRAINT_VIOLATION;
1588 /* can this user change the password? */
1589 if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
1590 ldb_asprintf_errstring(ldb,
1591 "check_password_restrictions: "
1592 "password can't be changed on this account!");
1593 return LDB_ERR_CONSTRAINT_VIOLATION;
1596 /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
1597 if (io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) {
1598 ldb_asprintf_errstring(ldb,
1599 "check_password_restrictions: "
1600 "password is too young to change!");
1601 return LDB_ERR_CONSTRAINT_VIOLATION;
1607 static int setup_io(struct ph_context *ac,
1608 const struct ldb_message *orig_msg,
1609 const struct ldb_message *searched_msg,
1610 struct setup_password_fields_io *io)
1612 const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
1613 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
1614 struct loadparm_context *lp_ctx =
1615 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1616 struct loadparm_context);
1621 /* Some operations below require kerberos contexts */
1623 if (smb_krb5_init_context(ac,
1624 ldb_get_event_context(ldb),
1625 (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
1626 &io->smb_krb5_context) != 0) {
1627 return ldb_operr(ldb);
1632 io->u.userAccountControl = samdb_result_uint(searched_msg, "userAccountControl", 0);
1633 io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
1634 io->u.sAMAccountName = samdb_result_string(searched_msg, "sAMAccountName", NULL);
1635 io->u.user_principal_name = samdb_result_string(searched_msg, "userPrincipalName", NULL);
1636 io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
1638 if (io->u.sAMAccountName == NULL) {
1639 ldb_asprintf_errstring(ldb,
1640 "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
1641 ldb_dn_get_linearized(searched_msg->dn));
1643 return LDB_ERR_CONSTRAINT_VIOLATION;
1646 /* Only non-trust accounts have restrictions (possibly this test is the
1647 * wrong way around, but we like to be restrictive if possible */
1648 io->u.restrictions = !(io->u.userAccountControl
1649 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
1650 | UF_SERVER_TRUST_ACCOUNT));
1652 if ((io->u.userAccountControl & UF_PASSWD_NOTREQD) != 0) {
1653 /* see [MS-ADTS] 2.2.15 */
1654 io->u.restrictions = 0;
1657 ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "userPassword",
1658 &io->n.cleartext_utf8, &io->og.cleartext_utf8);
1659 if (ret != LDB_SUCCESS) {
1660 ldb_asprintf_errstring(ldb,
1662 "it's only allowed to set the old password once!");
1666 ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "clearTextPassword",
1667 &io->n.cleartext_utf16, &io->og.cleartext_utf16);
1668 if (ret != LDB_SUCCESS) {
1669 ldb_asprintf_errstring(ldb,
1671 "it's only allowed to set the old password once!");
1675 /* this rather strange looking piece of code is there to
1676 handle a ldap client setting a password remotely using the
1677 unicodePwd ldap field. The syntax is that the password is
1678 in UTF-16LE, with a " at either end. Unfortunately the
1679 unicodePwd field is also used to store the nt hashes
1680 internally in Samba, and is used in the nt hash format on
1681 the wire in DRS replication, so we have a single name for
1682 two distinct values. The code below leaves us with a small
1683 chance (less than 1 in 2^32) of a mixup, if someone manages
1684 to create a MD4 hash which starts and ends in 0x22 0x00, as
1685 that would then be treated as a UTF16 password rather than
1688 ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "unicodePwd",
1689 "ed_utf16, &old_quoted_utf16);
1690 if (ret != LDB_SUCCESS) {
1691 ldb_asprintf_errstring(ldb,
1693 "it's only allowed to set the old password once!");
1697 /* Checks and converts the actual "unicodePwd" attribute */
1699 quoted_utf16->length >= 4 &&
1700 quoted_utf16->data[0] == '"' &&
1701 quoted_utf16->data[1] == 0 &&
1702 quoted_utf16->data[quoted_utf16->length-2] == '"' &&
1703 quoted_utf16->data[quoted_utf16->length-1] == 0) {
1704 struct ldb_val *quoted_utf16_2;
1706 if (io->n.cleartext_utf16) {
1707 /* refuse the change if someone wants to change with
1708 with both UTF16 possibilities at the same time... */
1709 ldb_asprintf_errstring(ldb,
1711 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
1712 return LDB_ERR_UNWILLING_TO_PERFORM;
1716 * adapt the quoted UTF16 string to be a real
1719 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
1720 if (quoted_utf16_2 == NULL) {
1721 return ldb_oom(ldb);
1724 quoted_utf16_2->data = quoted_utf16->data + 2;
1725 quoted_utf16_2->length = quoted_utf16->length-4;
1726 io->n.cleartext_utf16 = quoted_utf16_2;
1727 io->n.nt_hash = NULL;
1729 } else if (quoted_utf16) {
1730 /* We have only the hash available -> so no plaintext here */
1731 if (!ac->hash_values) {
1732 /* refuse the change if someone wants to change
1733 the hash without control specified... */
1734 ldb_asprintf_errstring(ldb,
1736 "it's not allowed to set the NT hash password directly'");
1737 /* this looks odd but this is what Windows does:
1738 returns "UNWILLING_TO_PERFORM" on wrong
1739 password sets and "CONSTRAINT_VIOLATION" on
1740 wrong password changes. */
1741 if (old_quoted_utf16 == NULL) {
1742 return LDB_ERR_UNWILLING_TO_PERFORM;
1745 return LDB_ERR_CONSTRAINT_VIOLATION;
1748 io->n.nt_hash = talloc(io->ac, struct samr_Password);
1749 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
1750 MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
1753 /* Checks and converts the previous "unicodePwd" attribute */
1754 if (old_quoted_utf16 &&
1755 old_quoted_utf16->length >= 4 &&
1756 old_quoted_utf16->data[0] == '"' &&
1757 old_quoted_utf16->data[1] == 0 &&
1758 old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
1759 old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
1760 struct ldb_val *old_quoted_utf16_2;
1762 if (io->og.cleartext_utf16) {
1763 /* refuse the change if someone wants to change with
1764 both UTF16 possibilities at the same time... */
1765 ldb_asprintf_errstring(ldb,
1767 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
1768 return LDB_ERR_UNWILLING_TO_PERFORM;
1772 * adapt the quoted UTF16 string to be a real
1775 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
1776 if (old_quoted_utf16_2 == NULL) {
1777 return ldb_oom(ldb);
1780 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
1781 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
1783 io->og.cleartext_utf16 = old_quoted_utf16_2;
1784 io->og.nt_hash = NULL;
1785 } else if (old_quoted_utf16) {
1786 /* We have only the hash available -> so no plaintext here */
1787 if (!ac->hash_values) {
1788 /* refuse the change if someone wants to change
1789 the hash without control specified... */
1790 ldb_asprintf_errstring(ldb,
1792 "it's not allowed to set the NT hash password directly'");
1793 return LDB_ERR_UNWILLING_TO_PERFORM;
1796 io->og.nt_hash = talloc(io->ac, struct samr_Password);
1797 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
1798 MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
1801 /* Handles the "dBCSPwd" attribute (LM hash) */
1802 io->n.lm_hash = NULL; io->og.lm_hash = NULL;
1803 ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "dBCSPwd",
1804 &lm_hash, &old_lm_hash);
1805 if (ret != LDB_SUCCESS) {
1806 ldb_asprintf_errstring(ldb,
1808 "it's only allowed to set the old password once!");
1812 if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
1813 /* refuse the change if someone wants to change the hash
1814 without control specified... */
1815 ldb_asprintf_errstring(ldb,
1817 "it's not allowed to set the LM hash password directly'");
1818 return LDB_ERR_UNWILLING_TO_PERFORM;
1821 if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
1822 io->n.lm_hash = talloc(io->ac, struct samr_Password);
1823 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
1824 sizeof(io->n.lm_hash->hash)));
1826 if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
1827 io->og.lm_hash = talloc(io->ac, struct samr_Password);
1828 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
1829 sizeof(io->og.lm_hash->hash)));
1832 /* refuse the change if someone wants to change the clear-
1833 text and supply his own hashes at the same time... */
1834 if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
1835 && (io->n.nt_hash || io->n.lm_hash)) {
1836 ldb_asprintf_errstring(ldb,
1838 "it's only allowed to set the password in form of cleartext attributes or as hashes");
1839 return LDB_ERR_UNWILLING_TO_PERFORM;
1842 /* refuse the change if someone wants to change the password
1843 using both plaintext methods (UTF8 and UTF16) at the same time... */
1844 if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
1845 ldb_asprintf_errstring(ldb,
1847 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
1848 return LDB_ERR_UNWILLING_TO_PERFORM;
1851 /* refuse the change if someone tries to set/change the password by
1852 * the lanman hash alone and we've deactivated that mechanism. This
1853 * would end in an account without any password! */
1854 if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
1855 && (!io->n.nt_hash) && (!io->n.lm_hash)) {
1856 ldb_asprintf_errstring(ldb,
1858 "The password change/set operations performed using the LAN Manager hash alone are deactivated!");
1859 return LDB_ERR_UNWILLING_TO_PERFORM;
1862 /* refuse the change if someone wants to compare against a plaintext
1863 or hash at the same time for a "password modify" operation... */
1864 if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
1865 && (io->og.nt_hash || io->og.lm_hash)) {
1866 ldb_asprintf_errstring(ldb,
1868 "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
1869 return LDB_ERR_UNWILLING_TO_PERFORM;
1872 /* refuse the change if someone wants to compare against both
1873 * plaintexts at the same time for a "password modify" operation... */
1874 if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
1875 ldb_asprintf_errstring(ldb,
1877 "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
1878 return LDB_ERR_UNWILLING_TO_PERFORM;
1881 /* Decides if we have a password modify or password reset operation */
1882 if (ac->req->operation == LDB_ADD) {
1883 /* On "add" we have only "password reset" */
1884 ac->pwd_reset = true;
1885 } else if (ac->req->operation == LDB_MODIFY) {
1886 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
1887 || io->og.nt_hash || io->og.lm_hash
1888 || ac->change_old_pw_checked) {
1889 /* If we have an old password or the "change old
1890 * password checked" control specified then for sure it
1891 * is a user "password change" */
1892 ac->pwd_reset = false;
1894 /* Otherwise we have also here a "password reset" */
1895 ac->pwd_reset = true;
1898 /* this shouldn't happen */
1899 return ldb_operr(ldb);
1905 static struct ph_context *ph_init_context(struct ldb_module *module,
1906 struct ldb_request *req)
1908 struct ldb_context *ldb;
1909 struct ph_context *ac;
1911 ldb = ldb_module_get_ctx(module);
1913 ac = talloc_zero(req, struct ph_context);
1915 ldb_set_errstring(ldb, "Out of Memory");
1919 ac->module = module;
1925 static void ph_apply_controls(struct ph_context *ac)
1927 struct ldb_control *ctrl;
1929 ac->change_status = false;
1930 ctrl = ldb_request_get_control(ac->req,
1931 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
1933 ac->change_status = true;
1935 /* Mark the "change status" control as uncritical (done) */
1936 ctrl->critical = false;
1939 ac->hash_values = false;
1940 ctrl = ldb_request_get_control(ac->req,
1941 DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
1943 ac->hash_values = true;
1945 /* Mark the "hash values" control as uncritical (done) */
1946 ctrl->critical = false;
1949 ac->change_old_pw_checked = false;
1950 ctrl = ldb_request_get_control(ac->req,
1951 DSDB_CONTROL_PASSWORD_CHANGE_OLD_PW_CHECKED_OID);
1953 ac->change_old_pw_checked = true;
1955 /* Mark the "change old password checked" control as uncritical
1957 ctrl->critical = false;
1961 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
1963 struct ph_context *ac;
1965 ac = talloc_get_type(req->context, struct ph_context);
1968 return ldb_module_done(ac->req, NULL, NULL,
1969 LDB_ERR_OPERATIONS_ERROR);
1972 if (ares->type == LDB_REPLY_REFERRAL) {
1973 return ldb_module_send_referral(ac->req, ares->referral);
1976 if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
1977 /* On success and trivial errors a status control is being
1978 * added (used for example by the "samdb_set_password" call) */
1979 ldb_reply_add_control(ares,
1980 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
1985 if (ares->error != LDB_SUCCESS) {
1986 return ldb_module_done(ac->req, ares->controls,
1987 ares->response, ares->error);
1990 if (ares->type != LDB_REPLY_DONE) {
1992 return ldb_module_done(ac->req, NULL, NULL,
1993 LDB_ERR_OPERATIONS_ERROR);
1996 return ldb_module_done(ac->req, ares->controls,
1997 ares->response, ares->error);
2000 static int password_hash_add_do_add(struct ph_context *ac);
2001 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2002 static int password_hash_mod_search_self(struct ph_context *ac);
2003 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2004 static int password_hash_mod_do_mod(struct ph_context *ac);
2006 static int get_domain_data_callback(struct ldb_request *req,
2007 struct ldb_reply *ares)
2009 struct ldb_context *ldb;
2010 struct ph_context *ac;
2011 struct loadparm_context *lp_ctx;
2014 ac = talloc_get_type(req->context, struct ph_context);
2015 ldb = ldb_module_get_ctx(ac->module);
2018 ret = LDB_ERR_OPERATIONS_ERROR;
2021 if (ares->error != LDB_SUCCESS) {
2022 return ldb_module_done(ac->req, ares->controls,
2023 ares->response, ares->error);
2026 switch (ares->type) {
2027 case LDB_REPLY_ENTRY:
2028 if (ac->status != NULL) {
2031 ldb_set_errstring(ldb, "Too many results");
2032 ret = LDB_ERR_OPERATIONS_ERROR;
2036 /* Setup the "status" structure (used as control later) */
2037 ac->status = talloc_zero(ac->req,
2038 struct dsdb_control_password_change_status);
2039 if (ac->status == NULL) {
2043 ret = LDB_ERR_OPERATIONS_ERROR;
2047 /* Setup the "domain data" structure */
2048 ac->status->domain_data.pwdProperties = samdb_result_uint(ares->message, "pwdProperties", -1);
2049 ac->status->domain_data.pwdHistoryLength = samdb_result_uint(ares->message, "pwdHistoryLength", -1);
2050 ac->status->domain_data.maxPwdAge = samdb_result_int64(ares->message, "maxPwdAge", -1);
2051 ac->status->domain_data.minPwdAge = samdb_result_int64(ares->message, "minPwdAge", -1);
2052 ac->status->domain_data.minPwdLength = samdb_result_uint(ares->message, "minPwdLength", -1);
2053 ac->status->domain_data.store_cleartext =
2054 ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2058 /* For a domain DN, this puts things in dotted notation */
2059 /* For builtin domains, this will give details for the host,
2060 * but that doesn't really matter, as it's just used for salt
2061 * and kerberos principals, which don't exist here */
2063 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2064 struct loadparm_context);
2066 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2067 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2068 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2070 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2075 case LDB_REPLY_REFERRAL:
2081 case LDB_REPLY_DONE:
2083 /* call the next step */
2084 switch (ac->req->operation) {
2086 ret = password_hash_add_do_add(ac);
2090 ret = password_hash_mod_do_mod(ac);
2094 ret = LDB_ERR_OPERATIONS_ERROR;
2101 if (ret != LDB_SUCCESS) {
2102 struct ldb_reply *new_ares;
2104 new_ares = talloc_zero(ac->req, struct ldb_reply);
2105 if (new_ares == NULL) {
2107 return ldb_module_done(ac->req, NULL, NULL,
2108 LDB_ERR_OPERATIONS_ERROR);
2111 new_ares->error = ret;
2112 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2113 /* On success and trivial errors a status control is being
2114 * added (used for example by the "samdb_set_password" call) */
2115 ldb_reply_add_control(new_ares,
2116 DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2121 return ldb_module_done(ac->req, new_ares->controls,
2122 new_ares->response, new_ares->error);
2128 static int build_domain_data_request(struct ph_context *ac)
2130 /* attrs[] is returned from this function in
2131 ac->dom_req->op.search.attrs, so it must be static, as
2132 otherwise the compiler can put it on the stack */
2133 struct ldb_context *ldb;
2134 static const char * const attrs[] = { "pwdProperties",
2141 ldb = ldb_module_get_ctx(ac->module);
2143 return ldb_build_search_req(&ac->dom_req, ldb, ac,
2144 ldb_get_default_basedn(ldb),
2148 ac, get_domain_data_callback,
2152 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2154 struct ldb_context *ldb;
2155 struct ph_context *ac;
2156 struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2159 struct ldb_control *bypass = NULL;
2161 ldb = ldb_module_get_ctx(module);
2163 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2165 if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2166 return ldb_next_request(module, req);
2169 /* If the caller is manipulating the local passwords directly, let them pass */
2170 if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
2171 req->op.add.message->dn) == 0) {
2172 return ldb_next_request(module, req);
2175 bypass = ldb_request_get_control(req,
2176 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2177 if (bypass != NULL) {
2178 /* Mark the "bypass" control as uncritical (done) */
2179 bypass->critical = false;
2180 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2181 return ldb_next_request(module, req);
2184 /* nobody must touch password histories and 'supplementalCredentials' */
2185 if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2186 return LDB_ERR_UNWILLING_TO_PERFORM;
2188 if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2189 return LDB_ERR_UNWILLING_TO_PERFORM;
2191 if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2192 return LDB_ERR_UNWILLING_TO_PERFORM;
2195 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2196 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2198 userPasswordAttr = ldb_msg_find_element(req->op.add.message, "userPassword");
2199 clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2200 ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2201 lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2203 if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2204 return ldb_next_request(module, req);
2207 /* Make sure we are performing the password set action on a (for us)
2208 * valid object. Those are instances of either "user" and/or
2209 * "inetOrgPerson". Otherwise continue with the submodules. */
2210 if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2211 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2213 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2214 ldb_set_errstring(ldb,
2215 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2216 return LDB_ERR_NO_SUCH_ATTRIBUTE;
2219 return ldb_next_request(module, req);
2222 ac = ph_init_context(module, req);
2224 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2225 return ldb_operr(ldb);
2227 ph_apply_controls(ac);
2229 /* get user domain data */
2230 ret = build_domain_data_request(ac);
2231 if (ret != LDB_SUCCESS) {
2235 return ldb_next_request(module, ac->dom_req);
2238 static int password_hash_add_do_add(struct ph_context *ac)
2240 struct ldb_context *ldb;
2241 struct ldb_request *down_req;
2242 struct ldb_message *msg;
2243 struct setup_password_fields_io io;
2246 /* Prepare the internal data structure containing the passwords */
2247 ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2248 if (ret != LDB_SUCCESS) {
2252 ldb = ldb_module_get_ctx(ac->module);
2254 msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2256 return ldb_operr(ldb);
2259 /* remove attributes that we just read into 'io' */
2260 ldb_msg_remove_attr(msg, "userPassword");
2261 ldb_msg_remove_attr(msg, "clearTextPassword");
2262 ldb_msg_remove_attr(msg, "unicodePwd");
2263 ldb_msg_remove_attr(msg, "dBCSPwd");
2264 ldb_msg_remove_attr(msg, "pwdLastSet");
2266 ret = setup_password_fields(&io);
2267 if (ret != LDB_SUCCESS) {
2271 ret = check_password_restrictions(&io);
2272 if (ret != LDB_SUCCESS) {
2277 ret = samdb_msg_add_hash(ldb, ac, msg,
2278 "unicodePwd", io.g.nt_hash);
2279 if (ret != LDB_SUCCESS) {
2284 ret = samdb_msg_add_hash(ldb, ac, msg,
2285 "dBCSPwd", io.g.lm_hash);
2286 if (ret != LDB_SUCCESS) {
2290 if (io.g.nt_history_len > 0) {
2291 ret = samdb_msg_add_hashes(ldb, ac, msg,
2294 io.g.nt_history_len);
2295 if (ret != LDB_SUCCESS) {
2299 if (io.g.lm_history_len > 0) {
2300 ret = samdb_msg_add_hashes(ldb, ac, msg,
2303 io.g.lm_history_len);
2304 if (ret != LDB_SUCCESS) {
2308 if (io.g.supplemental.length > 0) {
2309 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2310 &io.g.supplemental, NULL);
2311 if (ret != LDB_SUCCESS) {
2315 ret = samdb_msg_add_uint64(ldb, ac, msg,
2318 if (ret != LDB_SUCCESS) {
2322 ret = ldb_build_add_req(&down_req, ldb, ac,
2327 if (ret != LDB_SUCCESS) {
2331 return ldb_next_request(ac->module, down_req);
2334 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
2336 struct ldb_context *ldb;
2337 struct ph_context *ac;
2338 const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
2339 "unicodePwd", "dBCSPwd", NULL }, **l;
2340 unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
2341 struct ldb_message_element *passwordAttr;
2342 struct ldb_message *msg;
2343 struct ldb_request *down_req;
2345 struct ldb_control *bypass = NULL;
2347 ldb = ldb_module_get_ctx(module);
2349 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
2351 if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
2352 return ldb_next_request(module, req);
2355 /* If the caller is manipulating the local passwords directly, let them pass */
2356 if (ldb_dn_compare_base(ldb_dn_new(req, ldb, LOCAL_BASE),
2357 req->op.mod.message->dn) == 0) {
2358 return ldb_next_request(module, req);
2361 bypass = ldb_request_get_control(req,
2362 DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2363 if (bypass != NULL) {
2364 /* Mark the "bypass" control as uncritical (done) */
2365 bypass->critical = false;
2366 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
2367 return ldb_next_request(module, req);
2370 /* nobody must touch password histories and 'supplementalCredentials' */
2371 if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
2372 return LDB_ERR_UNWILLING_TO_PERFORM;
2374 if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
2375 return LDB_ERR_UNWILLING_TO_PERFORM;
2377 if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
2378 return LDB_ERR_UNWILLING_TO_PERFORM;
2381 /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2382 * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
2383 * For password changes/set there should be a 'delete' or a 'modify'
2384 * on these attributes. */
2386 for (l = passwordAttrs; *l != NULL; l++) {
2387 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
2391 if (attr_cnt == 0) {
2392 return ldb_next_request(module, req);
2395 ac = ph_init_context(module, req);
2397 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2398 return ldb_operr(ldb);
2400 ph_apply_controls(ac);
2402 /* use a new message structure so that we can modify it */
2403 msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
2405 return ldb_oom(ldb);
2408 /* - check for single-valued password attributes
2409 * (if not return "CONSTRAINT_VIOLATION")
2410 * - check that for a password change operation one add and one delete
2412 * (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
2413 * - check that a password change and a password set operation cannot
2415 * (if not return "UNWILLING_TO_PERFORM")
2416 * - remove all password attributes modifications from the first change
2417 * operation (anything without the passwords) - we will make the real
2418 * modification later */
2422 for (l = passwordAttrs; *l != NULL; l++) {
2423 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
2424 if (passwordAttr->flags == LDB_FLAG_MOD_DELETE) {
2427 if (passwordAttr->flags == LDB_FLAG_MOD_ADD) {
2430 if (passwordAttr->flags == LDB_FLAG_MOD_REPLACE) {
2433 if ((passwordAttr->num_values != 1) &&
2434 (passwordAttr->flags != LDB_FLAG_MOD_REPLACE)) {
2436 ldb_asprintf_errstring(ldb,
2437 "'%s' attributes must have exactly one value!",
2439 return LDB_ERR_CONSTRAINT_VIOLATION;
2441 ldb_msg_remove_element(msg, passwordAttr);
2444 if ((del_attr_cnt > 0) && (add_attr_cnt == 0)) {
2446 ldb_set_errstring(ldb,
2447 "Only the delete action for a password change specified!");
2448 return LDB_ERR_CONSTRAINT_VIOLATION;
2450 if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
2452 ldb_set_errstring(ldb,
2453 "Only the add action for a password change specified!");
2454 return LDB_ERR_UNWILLING_TO_PERFORM;
2456 if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
2458 ldb_set_errstring(ldb,
2459 "Only one delete and one add action for a password change allowed!");
2460 return LDB_ERR_UNWILLING_TO_PERFORM;
2462 if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
2464 ldb_set_errstring(ldb,
2465 "Either a password change or a password set operation is allowed!");
2466 return LDB_ERR_UNWILLING_TO_PERFORM;
2469 /* if there was nothing else to be modified skip to next step */
2470 if (msg->num_elements == 0) {
2471 return password_hash_mod_search_self(ac);
2474 ret = ldb_build_mod_req(&down_req, ldb, ac,
2477 ac, ph_modify_callback,
2479 if (ret != LDB_SUCCESS) {
2483 return ldb_next_request(module, down_req);
2486 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
2488 struct ph_context *ac;
2490 ac = talloc_get_type(req->context, struct ph_context);
2493 return ldb_module_done(ac->req, NULL, NULL,
2494 LDB_ERR_OPERATIONS_ERROR);
2497 if (ares->type == LDB_REPLY_REFERRAL) {
2498 return ldb_module_send_referral(ac->req, ares->referral);
2501 if (ares->error != LDB_SUCCESS) {
2502 return ldb_module_done(ac->req, ares->controls,
2503 ares->response, ares->error);
2506 if (ares->type != LDB_REPLY_DONE) {
2508 return ldb_module_done(ac->req, NULL, NULL,
2509 LDB_ERR_OPERATIONS_ERROR);
2514 return password_hash_mod_search_self(ac);
2517 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
2519 struct ldb_context *ldb;
2520 struct ph_context *ac;
2523 ac = talloc_get_type(req->context, struct ph_context);
2524 ldb = ldb_module_get_ctx(ac->module);
2527 ret = LDB_ERR_OPERATIONS_ERROR;
2530 if (ares->error != LDB_SUCCESS) {
2531 return ldb_module_done(ac->req, ares->controls,
2532 ares->response, ares->error);
2535 /* we are interested only in the single reply (base search) */
2536 switch (ares->type) {
2537 case LDB_REPLY_ENTRY:
2538 /* Make sure we are performing the password change action on a
2539 * (for us) valid object. Those are instances of either "user"
2540 * and/or "inetOrgPerson". Otherwise continue with the
2542 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
2543 && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
2546 if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
2547 ldb_set_errstring(ldb,
2548 "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2549 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
2553 ret = ldb_next_request(ac->module, ac->req);
2557 if (ac->search_res != NULL) {
2560 ldb_set_errstring(ldb, "Too many results");
2561 ret = LDB_ERR_OPERATIONS_ERROR;
2565 ac->search_res = talloc_steal(ac, ares);
2569 case LDB_REPLY_REFERRAL:
2570 /* ignore anything else for now */
2575 case LDB_REPLY_DONE:
2578 /* get user domain data */
2579 ret = build_domain_data_request(ac);
2580 if (ret != LDB_SUCCESS) {
2581 return ldb_module_done(ac->req, NULL, NULL, ret);
2584 ret = ldb_next_request(ac->module, ac->dom_req);
2589 if (ret != LDB_SUCCESS) {
2590 return ldb_module_done(ac->req, NULL, NULL, ret);
2596 static int password_hash_mod_search_self(struct ph_context *ac)
2598 struct ldb_context *ldb;
2599 static const char * const attrs[] = { "objectClass",
2600 "userAccountControl",
2604 "userPrincipalName",
2605 "supplementalCredentials",
2611 struct ldb_request *search_req;
2614 ldb = ldb_module_get_ctx(ac->module);
2616 ret = ldb_build_search_req(&search_req, ldb, ac,
2617 ac->req->op.mod.message->dn,
2622 ac, ph_mod_search_callback,
2625 if (ret != LDB_SUCCESS) {
2629 return ldb_next_request(ac->module, search_req);
2632 static int password_hash_mod_do_mod(struct ph_context *ac)
2634 struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2635 struct loadparm_context *lp_ctx =
2636 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2637 struct loadparm_context);
2638 struct ldb_request *mod_req;
2639 struct ldb_message *msg;
2640 const struct ldb_message *orig_msg, *searched_msg;
2641 struct setup_password_fields_io io;
2645 /* use a new message structure so that we can modify it */
2646 msg = ldb_msg_new(ac);
2648 return ldb_operr(ldb);
2652 msg->dn = ac->req->op.mod.message->dn;
2654 orig_msg = ac->req->op.mod.message;
2655 searched_msg = ac->search_res->message;
2657 /* Prepare the internal data structure containing the passwords */
2658 ret = setup_io(ac, orig_msg, searched_msg, &io);
2659 if (ret != LDB_SUCCESS) {
2663 /* Get the old password from the database */
2664 status = samdb_result_passwords(io.ac,
2666 discard_const_p(struct ldb_message, searched_msg),
2667 &io.o.lm_hash, &io.o.nt_hash);
2668 if (!NT_STATUS_IS_OK(status)) {
2669 return ldb_operr(ldb);
2672 io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
2673 io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
2674 io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
2676 ret = setup_password_fields(&io);
2677 if (ret != LDB_SUCCESS) {
2681 ret = check_password_restrictions(&io);
2682 if (ret != LDB_SUCCESS) {
2686 /* make sure we replace all the old attributes */
2687 ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
2688 ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
2689 ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
2690 ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
2691 ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
2692 ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
2695 ret = samdb_msg_add_hash(ldb, ac, msg,
2696 "unicodePwd", io.g.nt_hash);
2697 if (ret != LDB_SUCCESS) {
2702 ret = samdb_msg_add_hash(ldb, ac, msg,
2703 "dBCSPwd", io.g.lm_hash);
2704 if (ret != LDB_SUCCESS) {
2708 if (io.g.nt_history_len > 0) {
2709 ret = samdb_msg_add_hashes(ldb, ac, msg,
2712 io.g.nt_history_len);
2713 if (ret != LDB_SUCCESS) {
2717 if (io.g.lm_history_len > 0) {
2718 ret = samdb_msg_add_hashes(ldb, ac, msg,
2721 io.g.lm_history_len);
2722 if (ret != LDB_SUCCESS) {
2726 if (io.g.supplemental.length > 0) {
2727 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2728 &io.g.supplemental, NULL);
2729 if (ret != LDB_SUCCESS) {
2733 ret = samdb_msg_add_uint64(ldb, ac, msg,
2736 if (ret != LDB_SUCCESS) {
2740 ret = ldb_build_mod_req(&mod_req, ldb, ac,
2745 if (ret != LDB_SUCCESS) {
2749 return ldb_next_request(ac->module, mod_req);
2752 _PUBLIC_ const struct ldb_module_ops ldb_password_hash_module_ops = {
2753 .name = "password_hash",
2754 .add = password_hash_add,
2755 .modify = password_hash_modify