source4/dsdb/samdb/ldb_modules/password_hash.c

   1 /*
   2    ldb database module
   3
   4    Copyright (C) Simo Sorce  2004-2008
   5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
   6    Copyright (C) Andrew Tridgell 2004
   7    Copyright (C) Stefan Metzmacher 2007-2010
   8    Copyright (C) Matthias Dieter Wallnöfer 2009-2010
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 /*
  25  *  Name: ldb
  26  *
  27  *  Component: ldb password_hash module
  28  *
  29  *  Description: correctly handle AD password changes fields
  30  *
  31  *  Author: Andrew Bartlett
  32  *  Author: Stefan Metzmacher
  33  */
  34
  35 #include "includes.h"
  36 #include "ldb_module.h"
  37 #include "libcli/auth/libcli_auth.h"
  38 #include "system/kerberos.h"
  39 #include "auth/kerberos/kerberos.h"
  40 #include "dsdb/samdb/samdb.h"
  41 #include "dsdb/samdb/ldb_modules/util.h"
  42 #include "dsdb/samdb/ldb_modules/password_modules.h"
  43 #include "librpc/gen_ndr/ndr_drsblobs.h"
  44 #include "../lib/crypto/crypto.h"
  45 #include "param/param.h"
  46
  47 /* If we have decided there is a reason to work on this request, then
  48  * setup all the password hash types correctly.
  49  *
  50  * If we haven't the hashes yet but the password given as plain-text (attributes
  51  * 'unicodePwd', 'userPassword' and 'clearTextPassword') we have to check for
  52  * the constraints. Once this is done, we calculate the password hashes.
  53  *
  54  * Notice: unlike the real AD which only supports the UTF16 special based
  55  * 'unicodePwd' and the UTF8 based 'userPassword' plaintext attribute we
  56  * understand also a UTF16 based 'clearTextPassword' one.
  57  * The latter is also accessible through LDAP so it can also be set by external
  58  * tools and scripts. But be aware that this isn't portable on non SAMBA 4 ADs!
  59  *
  60  * Also when the module receives only the password hashes (possible through
  61  * specifying an internal LDB control - for security reasons) some checks are
  62  * performed depending on the operation mode (see below) (e.g. if the password
  63  * has been in use before if the password memory policy was activated).
  64  *
  65  * Attention: There is a difference between "modify" and "reset" operations
  66  * (see MS-ADTS 3.1.1.3.1.5). If the client sends a "add" and "remove"
  67  * operation for a password attribute we thread this as a "modify"; if it sends
  68  * only a "replace" one we have an (administrative) reset.
  69  *
  70  * Finally, if the administrator has requested that a password history
  71  * be maintained, then this should also be written out.
  72  *
  73  */
  74
  75 /* TODO: [consider always MS-ADTS 3.1.1.3.1.5]
  76  * - Check for right connection encryption
  77  */
  78
  79 /* Notice: Definition of "dsdb_control_password_change_status" moved into
  80  * "samdb.h" */
  81
  82 struct ph_context {
  83         struct ldb_module *module;
  84         struct ldb_request *req;
  85
  86         struct ldb_request *dom_req;
  87         struct ldb_reply *dom_res;
  88
  89         struct ldb_reply *search_res;
  90
  91         struct dsdb_control_password_change_status *status;
  92         struct dsdb_control_password_change *change;
  93
  94         bool pwd_reset;
  95         bool change_status;
  96         bool hash_values;
  97         bool userPassword;
  98         bool pwd_last_set_bypass;
  99 };
 100
 101
 102 struct setup_password_fields_io {
 103         struct ph_context *ac;
 104
 105         struct smb_krb5_context *smb_krb5_context;
 106
 107         /* infos about the user account */
 108         struct {
 109                 uint32_t userAccountControl;
 110                 NTTIME pwdLastSet;
 111                 const char *sAMAccountName;
 112                 const char *user_principal_name;
 113                 bool is_computer;
 114                 uint32_t restrictions;
 115         } u;
 116
 117         /* new credentials and old given credentials */
 118         struct setup_password_fields_given {
 119                 const struct ldb_val *cleartext_utf8;
 120                 const struct ldb_val *cleartext_utf16;
 121                 struct samr_Password *nt_hash;
 122                 struct samr_Password *lm_hash;
 123         } n, og;
 124
 125         /* old credentials */
 126         struct {
 127                 struct samr_Password *nt_hash;
 128                 struct samr_Password *lm_hash;
 129                 uint32_t nt_history_len;
 130                 struct samr_Password *nt_history;
 131                 uint32_t lm_history_len;
 132                 struct samr_Password *lm_history;
 133                 const struct ldb_val *supplemental;
 134                 struct supplementalCredentialsBlob scb;
 135         } o;
 136
 137         /* generated credentials */
 138         struct {
 139                 struct samr_Password *nt_hash;
 140                 struct samr_Password *lm_hash;
 141                 uint32_t nt_history_len;
 142                 struct samr_Password *nt_history;
 143                 uint32_t lm_history_len;
 144                 struct samr_Password *lm_history;
 145                 const char *salt;
 146                 DATA_BLOB aes_256;
 147                 DATA_BLOB aes_128;
 148                 DATA_BLOB des_md5;
 149                 DATA_BLOB des_crc;
 150                 struct ldb_val supplemental;
 151                 NTTIME last_set;
 152         } g;
 153 };
 154
 155 static int password_hash_bypass(struct ldb_module *module, struct ldb_request *request)
 156 {
 157         struct ldb_context *ldb = ldb_module_get_ctx(module);
 158         const struct ldb_message *msg;
 159         struct ldb_message_element *nte;
 160         struct ldb_message_element *lme;
 161         struct ldb_message_element *nthe;
 162         struct ldb_message_element *lmhe;
 163         struct ldb_message_element *sce;
 164
 165         switch (request->operation) {
 166         case LDB_ADD:
 167                 msg = request->op.add.message;
 168                 break;
 169         case LDB_MODIFY:
 170                 msg = request->op.mod.message;
 171                 break;
 172         default:
 173                 return ldb_next_request(module, request);
 174         }
 175
 176         /* nobody must touch password histories and 'supplementalCredentials' */
 177         nte = dsdb_get_single_valued_attr(msg, "unicodePwd",
 178                                           request->operation);
 179         lme = dsdb_get_single_valued_attr(msg, "dBCSPwd",
 180                                           request->operation);
 181         nthe = dsdb_get_single_valued_attr(msg, "ntPwdHistory",
 182                                            request->operation);
 183         lmhe = dsdb_get_single_valued_attr(msg, "lmPwdHistory",
 184                                            request->operation);
 185         sce = dsdb_get_single_valued_attr(msg, "supplementalCredentials",
 186                                           request->operation);
 187
 188 #define CHECK_HASH_ELEMENT(e, min, max) do {\
 189         if (e && e->num_values) { \
 190                 unsigned int _count; \
 191                 if (e->num_values != 1) { \
 192                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
 193                                          "num_values != 1"); \
 194                 } \
 195                 if ((e->values[0].length % 16) != 0) { \
 196                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
 197                                          "length % 16 != 0"); \
 198                 } \
 199                 _count = e->values[0].length / 16; \
 200                 if (_count < min) { \
 201                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
 202                                          "count < min"); \
 203                 } \
 204                 if (_count > max) { \
 205                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
 206                                          "count > max"); \
 207                 } \
 208         } \
 209 } while (0)
 210
 211         CHECK_HASH_ELEMENT(nte, 1, 1);
 212         CHECK_HASH_ELEMENT(lme, 1, 1);
 213         CHECK_HASH_ELEMENT(nthe, 1, INT32_MAX);
 214         CHECK_HASH_ELEMENT(lmhe, 1, INT32_MAX);
 215
 216         if (sce && sce->num_values) {
 217                 enum ndr_err_code ndr_err;
 218                 struct supplementalCredentialsBlob *scb;
 219                 struct supplementalCredentialsPackage *scpp = NULL;
 220                 struct supplementalCredentialsPackage *scpk = NULL;
 221                 struct supplementalCredentialsPackage *scpkn = NULL;
 222                 struct supplementalCredentialsPackage *scpct = NULL;
 223                 DATA_BLOB scpbp = data_blob_null;
 224                 DATA_BLOB scpbk = data_blob_null;
 225                 DATA_BLOB scpbkn = data_blob_null;
 226                 DATA_BLOB scpbct = data_blob_null;
 227                 DATA_BLOB blob;
 228                 uint32_t i;
 229
 230                 if (sce->num_values != 1) {
 231                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 232                                          "num_values != 1");
 233                 }
 234
 235                 scb = talloc_zero(request, struct supplementalCredentialsBlob);
 236                 if (!scb) {
 237                         return ldb_module_oom(module);
 238                 }
 239
 240                 ndr_err = ndr_pull_struct_blob_all(&sce->values[0], scb, scb,
 241                                 (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
 242                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 243                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 244                                          "ndr_pull_struct_blob_all");
 245                 }
 246
 247                 if (scb->sub.num_packages < 2) {
 248                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 249                                          "num_packages < 2");
 250                 }
 251
 252                 for (i=0; i < scb->sub.num_packages; i++) {
 253                         DATA_BLOB subblob;
 254
 255                         subblob = strhex_to_data_blob(scb, scb->sub.packages[i].data);
 256                         if (subblob.data == NULL) {
 257                                 return ldb_module_oom(module);
 258                         }
 259
 260                         if (strcmp(scb->sub.packages[i].name, "Packages") == 0) {
 261                                 if (scpp) {
 262                                         return ldb_error(ldb,
 263                                                          LDB_ERR_CONSTRAINT_VIOLATION,
 264                                                          "Packages twice");
 265                                 }
 266                                 scpp = &scb->sub.packages[i];
 267                                 scpbp = subblob;
 268                                 continue;
 269                         }
 270                         if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos") == 0) {
 271                                 if (scpk) {
 272                                         return ldb_error(ldb,
 273                                                          LDB_ERR_CONSTRAINT_VIOLATION,
 274                                                          "Primary:Kerberos twice");
 275                                 }
 276                                 scpk = &scb->sub.packages[i];
 277                                 scpbk = subblob;
 278                                 continue;
 279                         }
 280                         if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos-Newer-Keys") == 0) {
 281                                 if (scpkn) {
 282                                         return ldb_error(ldb,
 283                                                          LDB_ERR_CONSTRAINT_VIOLATION,
 284                                                          "Primary:Kerberos-Newer-Keys twice");
 285                                 }
 286                                 scpkn = &scb->sub.packages[i];
 287                                 scpbkn = subblob;
 288                                 continue;
 289                         }
 290                         if (strcmp(scb->sub.packages[i].name, "Primary:CLEARTEXT") == 0) {
 291                                 if (scpct) {
 292                                         return ldb_error(ldb,
 293                                                          LDB_ERR_CONSTRAINT_VIOLATION,
 294                                                          "Primary:CLEARTEXT twice");
 295                                 }
 296                                 scpct = &scb->sub.packages[i];
 297                                 scpbct = subblob;
 298                                 continue;
 299                         }
 300
 301                         data_blob_free(&subblob);
 302                 }
 303
 304                 if (scpp == NULL) {
 305                         return ldb_error(ldb,
 306                                          LDB_ERR_CONSTRAINT_VIOLATION,
 307                                          "Primary:Packages missing");
 308                 }
 309
 310                 if (scpk == NULL) {
 311                         /*
 312                          * If Primary:Kerberos is missing w2k8r2 reboots
 313                          * when a password is changed.
 314                          */
 315                         return ldb_error(ldb,
 316                                          LDB_ERR_CONSTRAINT_VIOLATION,
 317                                          "Primary:Kerberos missing");
 318                 }
 319
 320                 if (scpp) {
 321                         struct package_PackagesBlob *p;
 322                         uint32_t n;
 323
 324                         p = talloc_zero(scb, struct package_PackagesBlob);
 325                         if (p == NULL) {
 326                                 return ldb_module_oom(module);
 327                         }
 328
 329                         ndr_err = ndr_pull_struct_blob(&scpbp, p, p,
 330                                         (ndr_pull_flags_fn_t)ndr_pull_package_PackagesBlob);
 331                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 332                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 333                                                  "ndr_pull_struct_blob Packages");
 334                         }
 335
 336                         if (p->names == NULL) {
 337                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 338                                                  "Packages names == NULL");
 339                         }
 340
 341                         for (n = 0; p->names[n]; n++) {
 342                                 /* noop */
 343                         }
 344
 345                         if (scb->sub.num_packages != (n + 1)) {
 346                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 347                                                  "Packages num_packages != num_names + 1");
 348                         }
 349
 350                         talloc_free(p);
 351                 }
 352
 353                 if (scpk) {
 354                         struct package_PrimaryKerberosBlob *k;
 355
 356                         k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
 357                         if (k == NULL) {
 358                                 return ldb_module_oom(module);
 359                         }
 360
 361                         ndr_err = ndr_pull_struct_blob(&scpbk, k, k,
 362                                         (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 363                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 364                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 365                                                  "ndr_pull_struct_blob PrimaryKerberos");
 366                         }
 367
 368                         if (k->version != 3) {
 369                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 370                                                  "PrimaryKerberos version != 3");
 371                         }
 372
 373                         if (k->ctr.ctr3.salt.string == NULL) {
 374                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 375                                                  "PrimaryKerberos salt == NULL");
 376                         }
 377
 378                         if (strlen(k->ctr.ctr3.salt.string) == 0) {
 379                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 380                                                  "PrimaryKerberos strlen(salt) == 0");
 381                         }
 382
 383                         if (k->ctr.ctr3.num_keys != 2) {
 384                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 385                                                  "PrimaryKerberos num_keys != 2");
 386                         }
 387
 388                         if (k->ctr.ctr3.num_old_keys > k->ctr.ctr3.num_keys) {
 389                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 390                                                  "PrimaryKerberos num_old_keys > num_keys");
 391                         }
 392
 393                         if (k->ctr.ctr3.keys[0].keytype != ENCTYPE_DES_CBC_MD5) {
 394                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 395                                                  "PrimaryKerberos key[0] != DES_CBC_MD5");
 396                         }
 397                         if (k->ctr.ctr3.keys[1].keytype != ENCTYPE_DES_CBC_CRC) {
 398                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 399                                                  "PrimaryKerberos key[1] != DES_CBC_CRC");
 400                         }
 401
 402                         if (k->ctr.ctr3.keys[0].value_len != 8) {
 403                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 404                                                  "PrimaryKerberos key[0] value_len != 8");
 405                         }
 406                         if (k->ctr.ctr3.keys[1].value_len != 8) {
 407                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 408                                                  "PrimaryKerberos key[1] value_len != 8");
 409                         }
 410
 411                         for (i = 0; i < k->ctr.ctr3.num_old_keys; i++) {
 412                                 if (k->ctr.ctr3.old_keys[i].keytype ==
 413                                     k->ctr.ctr3.keys[i].keytype &&
 414                                     k->ctr.ctr3.old_keys[i].value_len ==
 415                                     k->ctr.ctr3.keys[i].value_len) {
 416                                         continue;
 417                                 }
 418
 419                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 420                                                  "PrimaryKerberos old_keys type/value_len doesn't match");
 421                         }
 422
 423                         talloc_free(k);
 424                 }
 425
 426                 if (scpkn) {
 427                         struct package_PrimaryKerberosBlob *k;
 428
 429                         k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
 430                         if (k == NULL) {
 431                                 return ldb_module_oom(module);
 432                         }
 433
 434                         ndr_err = ndr_pull_struct_blob(&scpbkn, k, k,
 435                                         (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 436                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 437                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 438                                                  "ndr_pull_struct_blob PrimaryKerberosNeverKeys");
 439                         }
 440
 441                         if (k->version != 4) {
 442                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 443                                                  "KerberosNerverKeys version != 4");
 444                         }
 445
 446                         if (k->ctr.ctr4.salt.string == NULL) {
 447                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 448                                                  "KerberosNewerKeys salt == NULL");
 449                         }
 450
 451                         if (strlen(k->ctr.ctr4.salt.string) == 0) {
 452                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 453                                                  "KerberosNewerKeys strlen(salt) == 0");
 454                         }
 455
 456                         if (k->ctr.ctr4.num_keys != 4) {
 457                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 458                                                  "KerberosNewerKeys num_keys != 2");
 459                         }
 460
 461                         if (k->ctr.ctr4.num_old_keys > k->ctr.ctr4.num_keys) {
 462                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 463                                                  "KerberosNewerKeys num_old_keys > num_keys");
 464                         }
 465
 466                         if (k->ctr.ctr4.num_older_keys > k->ctr.ctr4.num_old_keys) {
 467                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 468                                                  "KerberosNewerKeys num_older_keys > num_old_keys");
 469                         }
 470
 471                         if (k->ctr.ctr4.keys[0].keytype != ENCTYPE_AES256_CTS_HMAC_SHA1_96) {
 472                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 473                                                  "KerberosNewerKeys key[0] != AES256");
 474                         }
 475                         if (k->ctr.ctr4.keys[1].keytype != ENCTYPE_AES128_CTS_HMAC_SHA1_96) {
 476                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 477                                                  "KerberosNewerKeys key[1] != AES128");
 478                         }
 479                         if (k->ctr.ctr4.keys[2].keytype != ENCTYPE_DES_CBC_MD5) {
 480                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 481                                                  "KerberosNewerKeys key[2] != DES_CBC_MD5");
 482                         }
 483                         if (k->ctr.ctr4.keys[3].keytype != ENCTYPE_DES_CBC_CRC) {
 484                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 485                                                  "KerberosNewerKeys key[3] != DES_CBC_CRC");
 486                         }
 487
 488                         if (k->ctr.ctr4.keys[0].value_len != 32) {
 489                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 490                                                  "KerberosNewerKeys key[0] value_len != 32");
 491                         }
 492                         if (k->ctr.ctr4.keys[1].value_len != 16) {
 493                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 494                                                  "KerberosNewerKeys key[1] value_len != 16");
 495                         }
 496                         if (k->ctr.ctr4.keys[2].value_len != 8) {
 497                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 498                                                  "KerberosNewerKeys key[2] value_len != 8");
 499                         }
 500                         if (k->ctr.ctr4.keys[3].value_len != 8) {
 501                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 502                                                  "KerberosNewerKeys key[3] value_len != 8");
 503                         }
 504
 505                         /*
 506                          * TODO:
 507                          * Maybe we can check old and older keys here.
 508                          * But we need to do some tests, if the old keys
 509                          * can be taken from the PrimaryKerberos blob
 510                          * (with only des keys), when the domain was upgraded
 511                          * from w2k3 to w2k8.
 512                          */
 513
 514                         talloc_free(k);
 515                 }
 516
 517                 if (scpct) {
 518                         struct package_PrimaryCLEARTEXTBlob *ct;
 519
 520                         ct = talloc_zero(scb, struct package_PrimaryCLEARTEXTBlob);
 521                         if (ct == NULL) {
 522                                 return ldb_module_oom(module);
 523                         }
 524
 525                         ndr_err = ndr_pull_struct_blob(&scpbct, ct, ct,
 526                                         (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryCLEARTEXTBlob);
 527                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 528                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 529                                                  "ndr_pull_struct_blob PrimaryCLEARTEXT");
 530                         }
 531
 532                         if ((ct->cleartext.length % 2) != 0) {
 533                                 return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 534                                                  "PrimaryCLEARTEXT length % 2 != 0");
 535                         }
 536
 537                         talloc_free(ct);
 538                 }
 539
 540                 ndr_err = ndr_push_struct_blob(&blob, scb, scb,
 541                                 (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
 542                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 543                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 544                                          "ndr_pull_struct_blob_all");
 545                 }
 546
 547                 if (sce->values[0].length != blob.length) {
 548                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 549                                          "supplementalCredentialsBlob length differ");
 550                 }
 551
 552                 if (memcmp(sce->values[0].data, blob.data, blob.length) != 0) {
 553                         return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
 554                                          "supplementalCredentialsBlob memcmp differ");
 555                 }
 556
 557                 talloc_free(scb);
 558         }
 559
 560         ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_bypass - validated\n");
 561         return ldb_next_request(module, request);
 562 }
 563
 564 /* Get the NT hash, and fill it in as an entry in the password history,
 565    and specify it into io->g.nt_hash */
 566
 567 static int setup_nt_fields(struct setup_password_fields_io *io)
 568 {
 569         struct ldb_context *ldb;
 570         uint32_t i;
 571
 572         io->g.nt_hash = io->n.nt_hash;
 573         ldb = ldb_module_get_ctx(io->ac->module);
 574
 575         if (io->ac->status->domain_data.pwdHistoryLength == 0) {
 576                 return LDB_SUCCESS;
 577         }
 578
 579         /* We might not have an old NT password */
 580         io->g.nt_history = talloc_array(io->ac,
 581                                         struct samr_Password,
 582                                         io->ac->status->domain_data.pwdHistoryLength);
 583         if (!io->g.nt_history) {
 584                 return ldb_oom(ldb);
 585         }
 586
 587         for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
 588                             io->o.nt_history_len); i++) {
 589                 io->g.nt_history[i+1] = io->o.nt_history[i];
 590         }
 591         io->g.nt_history_len = i + 1;
 592
 593         if (io->g.nt_hash) {
 594                 io->g.nt_history[0] = *io->g.nt_hash;
 595         } else {
 596                 /*
 597                  * TODO: is this correct?
 598                  * the simular behavior is correct for the lm history case
 599                  */
 600                 E_md4hash("", io->g.nt_history[0].hash);
 601         }
 602
 603         return LDB_SUCCESS;
 604 }
 605
 606 /* Get the LANMAN hash, and fill it in as an entry in the password history,
 607    and specify it into io->g.lm_hash */
 608
 609 static int setup_lm_fields(struct setup_password_fields_io *io)
 610 {
 611         struct ldb_context *ldb;
 612         uint32_t i;
 613
 614         io->g.lm_hash = io->n.lm_hash;
 615         ldb = ldb_module_get_ctx(io->ac->module);
 616
 617         if (io->ac->status->domain_data.pwdHistoryLength == 0) {
 618                 return LDB_SUCCESS;
 619         }
 620
 621         /* We might not have an old LM password */
 622         io->g.lm_history = talloc_array(io->ac,
 623                                         struct samr_Password,
 624                                         io->ac->status->domain_data.pwdHistoryLength);
 625         if (!io->g.lm_history) {
 626                 return ldb_oom(ldb);
 627         }
 628
 629         for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
 630                             io->o.lm_history_len); i++) {
 631                 io->g.lm_history[i+1] = io->o.lm_history[i];
 632         }
 633         io->g.lm_history_len = i + 1;
 634
 635         if (io->g.lm_hash) {
 636                 io->g.lm_history[0] = *io->g.lm_hash;
 637         } else {
 638                 E_deshash("", io->g.lm_history[0].hash);
 639         }
 640
 641         return LDB_SUCCESS;
 642 }
 643
 644 static int setup_kerberos_keys(struct setup_password_fields_io *io)
 645 {
 646         struct ldb_context *ldb;
 647         krb5_error_code krb5_ret;
 648         Principal *salt_principal;
 649         krb5_salt salt;
 650         krb5_keyblock key;
 651         krb5_data cleartext_data;
 652
 653         ldb = ldb_module_get_ctx(io->ac->module);
 654         cleartext_data.data = io->n.cleartext_utf8->data;
 655         cleartext_data.length = io->n.cleartext_utf8->length;
 656
 657         /* Many, many thanks to lukeh@padl.com for this
 658          * algorithm, described in his Nov 10 2004 mail to
 659          * samba-technical@samba.org */
 660
 661         /*
 662          * Determine a salting principal
 663          */
 664         if (io->u.is_computer) {
 665                 char *name;
 666                 char *saltbody;
 667
 668                 name = strlower_talloc(io->ac, io->u.sAMAccountName);
 669                 if (!name) {
 670                         return ldb_oom(ldb);
 671                 }
 672
 673                 if (name[strlen(name)-1] == '$') {
 674                         name[strlen(name)-1] = '\0';
 675                 }
 676
 677                 saltbody = talloc_asprintf(io->ac, "%s.%s", name,
 678                                            io->ac->status->domain_data.dns_domain);
 679                 if (!saltbody) {
 680                         return ldb_oom(ldb);
 681                 }
 682
 683                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 684                                                &salt_principal,
 685                                                io->ac->status->domain_data.realm,
 686                                                "host", saltbody, NULL);
 687         } else if (io->u.user_principal_name) {
 688                 char *user_principal_name;
 689                 char *p;
 690
 691                 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
 692                 if (!user_principal_name) {
 693                         return ldb_oom(ldb);
 694                 }
 695
 696                 p = strchr(user_principal_name, '@');
 697                 if (p) {
 698                         p[0] = '\0';
 699                 }
 700
 701                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 702                                                &salt_principal,
 703                                                io->ac->status->domain_data.realm,
 704                                                user_principal_name, NULL);
 705         } else {
 706                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 707                                                &salt_principal,
 708                                                io->ac->status->domain_data.realm,
 709                                                io->u.sAMAccountName, NULL);
 710         }
 711         if (krb5_ret) {
 712                 ldb_asprintf_errstring(ldb,
 713                                        "setup_kerberos_keys: "
 714                                        "generation of a salting principal failed: %s",
 715                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 716                                                                   krb5_ret, io->ac));
 717                 return LDB_ERR_OPERATIONS_ERROR;
 718         }
 719
 720         /*
 721          * create salt from salt_principal
 722          */
 723         krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
 724                                     salt_principal, &salt);
 725         krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
 726         if (krb5_ret) {
 727                 ldb_asprintf_errstring(ldb,
 728                                        "setup_kerberos_keys: "
 729                                        "generation of krb5_salt failed: %s",
 730                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 731                                                                   krb5_ret, io->ac));
 732                 return LDB_ERR_OPERATIONS_ERROR;
 733         }
 734         /* create a talloc copy */
 735         io->g.salt = talloc_strndup(io->ac,
 736                                     (char *)salt.saltvalue.data,
 737                                     salt.saltvalue.length);
 738         krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
 739         if (!io->g.salt) {
 740                 return ldb_oom(ldb);
 741         }
 742         salt.saltvalue.data     = discard_const(io->g.salt);
 743         salt.saltvalue.length   = strlen(io->g.salt);
 744
 745         /*
 746          * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
 747          * the salt and the cleartext password
 748          */
 749         krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
 750                                                 ENCTYPE_AES256_CTS_HMAC_SHA1_96,
 751                                                 cleartext_data,
 752                                                 salt,
 753                                                 &key);
 754         if (krb5_ret) {
 755                 ldb_asprintf_errstring(ldb,
 756                                        "setup_kerberos_keys: "
 757                                        "generation of a aes256-cts-hmac-sha1-96 key failed: %s",
 758                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 759                                                                   krb5_ret, io->ac));
 760                 return LDB_ERR_OPERATIONS_ERROR;
 761         }
 762         io->g.aes_256 = data_blob_talloc(io->ac,
 763                                          KRB5_KEY_DATA(&key),
 764                                          KRB5_KEY_LENGTH(&key));
 765         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 766         if (!io->g.aes_256.data) {
 767                 return ldb_oom(ldb);
 768         }
 769
 770         /*
 771          * create ENCTYPE_AES128_CTS_HMAC_SHA1_96 key out of
 772          * the salt and the cleartext password
 773          */
 774         krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
 775                                                 ENCTYPE_AES128_CTS_HMAC_SHA1_96,
 776                                                 cleartext_data,
 777                                                 salt,
 778                                                 &key);
 779         if (krb5_ret) {
 780                 ldb_asprintf_errstring(ldb,
 781                                        "setup_kerberos_keys: "
 782                                        "generation of a aes128-cts-hmac-sha1-96 key failed: %s",
 783                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 784                                                                   krb5_ret, io->ac));
 785                 return LDB_ERR_OPERATIONS_ERROR;
 786         }
 787         io->g.aes_128 = data_blob_talloc(io->ac,
 788                                          KRB5_KEY_DATA(&key),
 789                                          KRB5_KEY_LENGTH(&key));
 790         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 791         if (!io->g.aes_128.data) {
 792                 return ldb_oom(ldb);
 793         }
 794
 795         /*
 796          * create ENCTYPE_DES_CBC_MD5 key out of
 797          * the salt and the cleartext password
 798          */
 799         krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
 800                                                 ENCTYPE_DES_CBC_MD5,
 801                                                 cleartext_data,
 802                                                 salt,
 803                                                 &key);
 804         if (krb5_ret) {
 805                 ldb_asprintf_errstring(ldb,
 806                                        "setup_kerberos_keys: "
 807                                        "generation of a des-cbc-md5 key failed: %s",
 808                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 809                                                                   krb5_ret, io->ac));
 810                 return LDB_ERR_OPERATIONS_ERROR;
 811         }
 812         io->g.des_md5 = data_blob_talloc(io->ac,
 813                                          KRB5_KEY_DATA(&key),
 814                                          KRB5_KEY_LENGTH(&key));
 815         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 816         if (!io->g.des_md5.data) {
 817                 return ldb_oom(ldb);
 818         }
 819
 820         /*
 821          * create ENCTYPE_DES_CBC_CRC key out of
 822          * the salt and the cleartext password
 823          */
 824         krb5_ret = krb5_string_to_key_data_salt(io->smb_krb5_context->krb5_context,
 825                                                 ENCTYPE_DES_CBC_CRC,
 826                                                 cleartext_data,
 827                                                 salt,
 828                                                 &key);
 829         if (krb5_ret) {
 830                 ldb_asprintf_errstring(ldb,
 831                                        "setup_kerberos_keys: "
 832                                        "generation of a des-cbc-crc key failed: %s",
 833                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context,
 834                                                                   krb5_ret, io->ac));
 835                 return LDB_ERR_OPERATIONS_ERROR;
 836         }
 837         io->g.des_crc = data_blob_talloc(io->ac,
 838                                          KRB5_KEY_DATA(&key),
 839                                          KRB5_KEY_LENGTH(&key));
 840         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 841         if (!io->g.des_crc.data) {
 842                 return ldb_oom(ldb);
 843         }
 844
 845         return LDB_SUCCESS;
 846 }
 847
 848 static int setup_primary_kerberos(struct setup_password_fields_io *io,
 849                                   const struct supplementalCredentialsBlob *old_scb,
 850                                   struct package_PrimaryKerberosBlob *pkb)
 851 {
 852         struct ldb_context *ldb;
 853         struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
 854         struct supplementalCredentialsPackage *old_scp = NULL;
 855         struct package_PrimaryKerberosBlob _old_pkb;
 856         struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
 857         uint32_t i;
 858         enum ndr_err_code ndr_err;
 859
 860         ldb = ldb_module_get_ctx(io->ac->module);
 861
 862         /*
 863          * prepare generation of keys
 864          *
 865          * ENCTYPE_DES_CBC_MD5
 866          * ENCTYPE_DES_CBC_CRC
 867          */
 868         pkb->version            = 3;
 869         pkb3->salt.string       = io->g.salt;
 870         pkb3->num_keys          = 2;
 871         pkb3->keys              = talloc_array(io->ac,
 872                                                struct package_PrimaryKerberosKey3,
 873                                                pkb3->num_keys);
 874         if (!pkb3->keys) {
 875                 return ldb_oom(ldb);
 876         }
 877
 878         pkb3->keys[0].keytype   = ENCTYPE_DES_CBC_MD5;
 879         pkb3->keys[0].value     = &io->g.des_md5;
 880         pkb3->keys[1].keytype   = ENCTYPE_DES_CBC_CRC;
 881         pkb3->keys[1].value     = &io->g.des_crc;
 882
 883         /* initialize the old keys to zero */
 884         pkb3->num_old_keys      = 0;
 885         pkb3->old_keys          = NULL;
 886
 887         /* if there're no old keys, then we're done */
 888         if (!old_scb) {
 889                 return LDB_SUCCESS;
 890         }
 891
 892         for (i=0; i < old_scb->sub.num_packages; i++) {
 893                 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
 894                         continue;
 895                 }
 896
 897                 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
 898                         continue;
 899                 }
 900
 901                 old_scp = &old_scb->sub.packages[i];
 902                 break;
 903         }
 904         /* Primary:Kerberos element of supplementalCredentials */
 905         if (old_scp) {
 906                 DATA_BLOB blob;
 907
 908                 blob = strhex_to_data_blob(io->ac, old_scp->data);
 909                 if (!blob.data) {
 910                         return ldb_oom(ldb);
 911                 }
 912
 913                 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
 914                 ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
 915                                                (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 916                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 917                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 918                         ldb_asprintf_errstring(ldb,
 919                                                "setup_primary_kerberos: "
 920                                                "failed to pull old package_PrimaryKerberosBlob: %s",
 921                                                nt_errstr(status));
 922                         return LDB_ERR_OPERATIONS_ERROR;
 923                 }
 924
 925                 if (_old_pkb.version != 3) {
 926                         ldb_asprintf_errstring(ldb,
 927                                                "setup_primary_kerberos: "
 928                                                "package_PrimaryKerberosBlob version[%u] expected[3]",
 929                                                _old_pkb.version);
 930                         return LDB_ERR_OPERATIONS_ERROR;
 931                 }
 932
 933                 old_pkb3 = &_old_pkb.ctr.ctr3;
 934         }
 935
 936         /* if we didn't found the old keys we're done */
 937         if (!old_pkb3) {
 938                 return LDB_SUCCESS;
 939         }
 940
 941         /* fill in the old keys */
 942         pkb3->num_old_keys      = old_pkb3->num_keys;
 943         pkb3->old_keys          = old_pkb3->keys;
 944
 945         return LDB_SUCCESS;
 946 }
 947
 948 static int setup_primary_kerberos_newer(struct setup_password_fields_io *io,
 949                                         const struct supplementalCredentialsBlob *old_scb,
 950                                         struct package_PrimaryKerberosBlob *pkb)
 951 {
 952         struct ldb_context *ldb;
 953         struct package_PrimaryKerberosCtr4 *pkb4 = &pkb->ctr.ctr4;
 954         struct supplementalCredentialsPackage *old_scp = NULL;
 955         struct package_PrimaryKerberosBlob _old_pkb;
 956         struct package_PrimaryKerberosCtr4 *old_pkb4 = NULL;
 957         uint32_t i;
 958         enum ndr_err_code ndr_err;
 959
 960         ldb = ldb_module_get_ctx(io->ac->module);
 961
 962         /*
 963          * prepare generation of keys
 964          *
 965          * ENCTYPE_AES256_CTS_HMAC_SHA1_96
 966          * ENCTYPE_AES128_CTS_HMAC_SHA1_96
 967          * ENCTYPE_DES_CBC_MD5
 968          * ENCTYPE_DES_CBC_CRC
 969          */
 970         pkb->version                    = 4;
 971         pkb4->salt.string               = io->g.salt;
 972         pkb4->default_iteration_count   = 4096;
 973         pkb4->num_keys                  = 4;
 974
 975         pkb4->keys = talloc_array(io->ac,
 976                                   struct package_PrimaryKerberosKey4,
 977                                   pkb4->num_keys);
 978         if (!pkb4->keys) {
 979                 return ldb_oom(ldb);
 980         }
 981
 982         pkb4->keys[0].iteration_count   = 4096;
 983         pkb4->keys[0].keytype           = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
 984         pkb4->keys[0].value             = &io->g.aes_256;
 985         pkb4->keys[1].iteration_count   = 4096;
 986         pkb4->keys[1].keytype           = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
 987         pkb4->keys[1].value             = &io->g.aes_128;
 988         pkb4->keys[2].iteration_count   = 4096;
 989         pkb4->keys[2].keytype           = ENCTYPE_DES_CBC_MD5;
 990         pkb4->keys[2].value             = &io->g.des_md5;
 991         pkb4->keys[3].iteration_count   = 4096;
 992         pkb4->keys[3].keytype           = ENCTYPE_DES_CBC_CRC;
 993         pkb4->keys[3].value             = &io->g.des_crc;
 994
 995         /* initialize the old keys to zero */
 996         pkb4->num_old_keys      = 0;
 997         pkb4->old_keys          = NULL;
 998         pkb4->num_older_keys    = 0;
 999         pkb4->older_keys        = NULL;
1000
1001         /* if there're no old keys, then we're done */
1002         if (!old_scb) {
1003                 return LDB_SUCCESS;
1004         }
1005
1006         for (i=0; i < old_scb->sub.num_packages; i++) {
1007                 if (strcmp("Primary:Kerberos-Newer-Keys", old_scb->sub.packages[i].name) != 0) {
1008                         continue;
1009                 }
1010
1011                 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
1012                         continue;
1013                 }
1014
1015                 old_scp = &old_scb->sub.packages[i];
1016                 break;
1017         }
1018         /* Primary:Kerberos-Newer-Keys element of supplementalCredentials */
1019         if (old_scp) {
1020                 DATA_BLOB blob;
1021
1022                 blob = strhex_to_data_blob(io->ac, old_scp->data);
1023                 if (!blob.data) {
1024                         return ldb_oom(ldb);
1025                 }
1026
1027                 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
1028                 ndr_err = ndr_pull_struct_blob(&blob, io->ac,
1029                                                &_old_pkb,
1030                                                (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
1031                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1032                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1033                         ldb_asprintf_errstring(ldb,
1034                                                "setup_primary_kerberos_newer: "
1035                                                "failed to pull old package_PrimaryKerberosBlob: %s",
1036                                                nt_errstr(status));
1037                         return LDB_ERR_OPERATIONS_ERROR;
1038                 }
1039
1040                 if (_old_pkb.version != 4) {
1041                         ldb_asprintf_errstring(ldb,
1042                                                "setup_primary_kerberos_newer: "
1043                                                "package_PrimaryKerberosBlob version[%u] expected[4]",
1044                                                _old_pkb.version);
1045                         return LDB_ERR_OPERATIONS_ERROR;
1046                 }
1047
1048                 old_pkb4 = &_old_pkb.ctr.ctr4;
1049         }
1050
1051         /* if we didn't found the old keys we're done */
1052         if (!old_pkb4) {
1053                 return LDB_SUCCESS;
1054         }
1055
1056         /* fill in the old keys */
1057         pkb4->num_old_keys      = old_pkb4->num_keys;
1058         pkb4->old_keys          = old_pkb4->keys;
1059         pkb4->num_older_keys    = old_pkb4->num_old_keys;
1060         pkb4->older_keys        = old_pkb4->old_keys;
1061
1062         return LDB_SUCCESS;
1063 }
1064
1065 static int setup_primary_wdigest(struct setup_password_fields_io *io,
1066                                  const struct supplementalCredentialsBlob *old_scb,
1067                                  struct package_PrimaryWDigestBlob *pdb)
1068 {
1069         struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1070         DATA_BLOB sAMAccountName;
1071         DATA_BLOB sAMAccountName_l;
1072         DATA_BLOB sAMAccountName_u;
1073         const char *user_principal_name = io->u.user_principal_name;
1074         DATA_BLOB userPrincipalName;
1075         DATA_BLOB userPrincipalName_l;
1076         DATA_BLOB userPrincipalName_u;
1077         DATA_BLOB netbios_domain;
1078         DATA_BLOB netbios_domain_l;
1079         DATA_BLOB netbios_domain_u;
1080         DATA_BLOB dns_domain;
1081         DATA_BLOB dns_domain_l;
1082         DATA_BLOB dns_domain_u;
1083         DATA_BLOB digest;
1084         DATA_BLOB delim;
1085         DATA_BLOB backslash;
1086         uint8_t i;
1087         struct {
1088                 DATA_BLOB *user;
1089                 DATA_BLOB *realm;
1090                 DATA_BLOB *nt4dom;
1091         } wdigest[] = {
1092         /*
1093          * See
1094          * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
1095          * for what precalculated hashes are supposed to be stored...
1096          *
1097          * I can't reproduce all values which should contain "Digest" as realm,
1098          * am I doing something wrong or is w2k3 just broken...?
1099          *
1100          * W2K3 fills in following for a user:
1101          *
1102          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1103          * sAMAccountName: NewUser2Sam
1104          * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
1105          *
1106          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1107          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1108          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1109          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1110          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1111          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1112          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1113          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1114          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1115          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1116          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1117          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1118          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1119          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1120          * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1121          * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1122          * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1123          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1124          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1125          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1126          * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
1127          * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
1128          * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
1129          * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
1130          * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
1131          * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
1132          * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
1133          * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
1134          * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
1135          *
1136          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
1137          * sAMAccountName: NewUser2Sam
1138          *
1139          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1140          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
1141          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
1142          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
1143          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
1144          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
1145          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
1146          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1147          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1148          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1149          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1150          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1151          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
1152          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
1153          * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1154          * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
1155          * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
1156          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
1157          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
1158          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
1159          * 31dc704d3640335b2123d4ee28aa1f11 => ???M1   changes with NewUser2Sam => NewUser1Sam
1160          * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
1161          * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
1162          * 569b4533f2d9e580211dd040e5e360a8 => ???M2   changes with NewUser2Princ => NewUser1Princ
1163          * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
1164          * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
1165          * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
1166          * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
1167          * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
1168          */
1169
1170         /*
1171          * sAMAccountName, netbios_domain
1172          */
1173                 {
1174                 .user   = &sAMAccountName,
1175                 .realm  = &netbios_domain,
1176                 },
1177                 {
1178                 .user   = &sAMAccountName_l,
1179                 .realm  = &netbios_domain_l,
1180                 },
1181                 {
1182                 .user   = &sAMAccountName_u,
1183                 .realm  = &netbios_domain_u,
1184                 },
1185                 {
1186                 .user   = &sAMAccountName,
1187                 .realm  = &netbios_domain_u,
1188                 },
1189                 {
1190                 .user   = &sAMAccountName,
1191                 .realm  = &netbios_domain_l,
1192                 },
1193                 {
1194                 .user   = &sAMAccountName_u,
1195                 .realm  = &netbios_domain_l,
1196                 },
1197                 {
1198                 .user   = &sAMAccountName_l,
1199                 .realm  = &netbios_domain_u,
1200                 },
1201         /*
1202          * sAMAccountName, dns_domain
1203          */
1204                 {
1205                 .user   = &sAMAccountName,
1206                 .realm  = &dns_domain,
1207                 },
1208                 {
1209                 .user   = &sAMAccountName_l,
1210                 .realm  = &dns_domain_l,
1211                 },
1212                 {
1213                 .user   = &sAMAccountName_u,
1214                 .realm  = &dns_domain_u,
1215                 },
1216                 {
1217                 .user   = &sAMAccountName,
1218                 .realm  = &dns_domain_u,
1219                 },
1220                 {
1221                 .user   = &sAMAccountName,
1222                 .realm  = &dns_domain_l,
1223                 },
1224                 {
1225                 .user   = &sAMAccountName_u,
1226                 .realm  = &dns_domain_l,
1227                 },
1228                 {
1229                 .user   = &sAMAccountName_l,
1230                 .realm  = &dns_domain_u,
1231                 },
1232         /*
1233          * userPrincipalName, no realm
1234          */
1235                 {
1236                 .user   = &userPrincipalName,
1237                 },
1238                 {
1239                 /*
1240                  * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
1241                  *       the fallback to the sAMAccountName based userPrincipalName is correct
1242                  */
1243                 .user   = &userPrincipalName_l,
1244                 },
1245                 {
1246                 .user   = &userPrincipalName_u,
1247                 },
1248         /*
1249          * nt4dom\sAMAccountName, no realm
1250          */
1251                 {
1252                 .user   = &sAMAccountName,
1253                 .nt4dom = &netbios_domain
1254                 },
1255                 {
1256                 .user   = &sAMAccountName_l,
1257                 .nt4dom = &netbios_domain_l
1258                 },
1259                 {
1260                 .user   = &sAMAccountName_u,
1261                 .nt4dom = &netbios_domain_u
1262                 },
1263
1264         /*
1265          * the following ones are guessed depending on the technet2 article
1266          * but not reproducable on a w2k3 server
1267          */
1268         /* sAMAccountName with "Digest" realm */
1269                 {
1270                 .user   = &sAMAccountName,
1271                 .realm  = &digest
1272                 },
1273                 {
1274                 .user   = &sAMAccountName_l,
1275                 .realm  = &digest
1276                 },
1277                 {
1278                 .user   = &sAMAccountName_u,
1279                 .realm  = &digest
1280                 },
1281         /* userPrincipalName with "Digest" realm */
1282                 {
1283                 .user   = &userPrincipalName,
1284                 .realm  = &digest
1285                 },
1286                 {
1287                 .user   = &userPrincipalName_l,
1288                 .realm  = &digest
1289                 },
1290                 {
1291                 .user   = &userPrincipalName_u,
1292                 .realm  = &digest
1293                 },
1294         /* nt4dom\\sAMAccountName with "Digest" realm */
1295                 {
1296                 .user   = &sAMAccountName,
1297                 .nt4dom = &netbios_domain,
1298                 .realm  = &digest
1299                 },
1300                 {
1301                 .user   = &sAMAccountName_l,
1302                 .nt4dom = &netbios_domain_l,
1303                 .realm  = &digest
1304                 },
1305                 {
1306                 .user   = &sAMAccountName_u,
1307                 .nt4dom = &netbios_domain_u,
1308                 .realm  = &digest
1309                 },
1310         };
1311
1312         /* prepare DATA_BLOB's used in the combinations array */
1313         sAMAccountName          = data_blob_string_const(io->u.sAMAccountName);
1314         sAMAccountName_l        = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
1315         if (!sAMAccountName_l.data) {
1316                 return ldb_oom(ldb);
1317         }
1318         sAMAccountName_u        = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
1319         if (!sAMAccountName_u.data) {
1320                 return ldb_oom(ldb);
1321         }
1322
1323         /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
1324         if (!user_principal_name) {
1325                 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
1326                                                       io->u.sAMAccountName,
1327                                                       io->ac->status->domain_data.dns_domain);
1328                 if (!user_principal_name) {
1329                         return ldb_oom(ldb);
1330                 }
1331         }
1332         userPrincipalName       = data_blob_string_const(user_principal_name);
1333         userPrincipalName_l     = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
1334         if (!userPrincipalName_l.data) {
1335                 return ldb_oom(ldb);
1336         }
1337         userPrincipalName_u     = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
1338         if (!userPrincipalName_u.data) {
1339                 return ldb_oom(ldb);
1340         }
1341
1342         netbios_domain          = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
1343         netbios_domain_l        = data_blob_string_const(strlower_talloc(io->ac,
1344                                                                          io->ac->status->domain_data.netbios_domain));
1345         if (!netbios_domain_l.data) {
1346                 return ldb_oom(ldb);
1347         }
1348         netbios_domain_u        = data_blob_string_const(strupper_talloc(io->ac,
1349                                                                          io->ac->status->domain_data.netbios_domain));
1350         if (!netbios_domain_u.data) {
1351                 return ldb_oom(ldb);
1352         }
1353
1354         dns_domain              = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1355         dns_domain_l            = data_blob_string_const(io->ac->status->domain_data.dns_domain);
1356         dns_domain_u            = data_blob_string_const(io->ac->status->domain_data.realm);
1357
1358         digest                  = data_blob_string_const("Digest");
1359
1360         delim                   = data_blob_string_const(":");
1361         backslash               = data_blob_string_const("\\");
1362
1363         pdb->num_hashes = ARRAY_SIZE(wdigest);
1364         pdb->hashes     = talloc_array(io->ac, struct package_PrimaryWDigestHash,
1365                                        pdb->num_hashes);
1366         if (!pdb->hashes) {
1367                 return ldb_oom(ldb);
1368         }
1369
1370         for (i=0; i < ARRAY_SIZE(wdigest); i++) {
1371                 MD5_CTX md5;
1372                 MD5Init(&md5);
1373                 if (wdigest[i].nt4dom) {
1374                         MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
1375                         MD5Update(&md5, backslash.data, backslash.length);
1376                 }
1377                 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
1378                 MD5Update(&md5, delim.data, delim.length);
1379                 if (wdigest[i].realm) {
1380                         MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
1381                 }
1382                 MD5Update(&md5, delim.data, delim.length);
1383                 MD5Update(&md5, io->n.cleartext_utf8->data, io->n.cleartext_utf8->length);
1384                 MD5Final(pdb->hashes[i].hash, &md5);
1385         }
1386
1387         return LDB_SUCCESS;
1388 }
1389
1390 static int setup_supplemental_field(struct setup_password_fields_io *io)
1391 {
1392         struct ldb_context *ldb;
1393         struct supplementalCredentialsBlob scb;
1394         struct supplementalCredentialsBlob _old_scb;
1395         struct supplementalCredentialsBlob *old_scb = NULL;
1396         /* Packages + (Kerberos-Newer-Keys, Kerberos, WDigest and CLEARTEXT) */
1397         uint32_t num_names = 0;
1398         const char *names[1+4];
1399         uint32_t num_packages = 0;
1400         struct supplementalCredentialsPackage packages[1+4];
1401         /* Packages */
1402         struct supplementalCredentialsPackage *pp = NULL;
1403         struct package_PackagesBlob pb;
1404         DATA_BLOB pb_blob;
1405         char *pb_hexstr;
1406         /* Primary:Kerberos-Newer-Keys */
1407         const char **nkn = NULL;
1408         struct supplementalCredentialsPackage *pkn = NULL;
1409         struct package_PrimaryKerberosBlob pknb;
1410         DATA_BLOB pknb_blob;
1411         char *pknb_hexstr;
1412         /* Primary:Kerberos */
1413         const char **nk = NULL;
1414         struct supplementalCredentialsPackage *pk = NULL;
1415         struct package_PrimaryKerberosBlob pkb;
1416         DATA_BLOB pkb_blob;
1417         char *pkb_hexstr;
1418         /* Primary:WDigest */
1419         const char **nd = NULL;
1420         struct supplementalCredentialsPackage *pd = NULL;
1421         struct package_PrimaryWDigestBlob pdb;
1422         DATA_BLOB pdb_blob;
1423         char *pdb_hexstr;
1424         /* Primary:CLEARTEXT */
1425         const char **nc = NULL;
1426         struct supplementalCredentialsPackage *pc = NULL;
1427         struct package_PrimaryCLEARTEXTBlob pcb;
1428         DATA_BLOB pcb_blob;
1429         char *pcb_hexstr;
1430         int ret;
1431         enum ndr_err_code ndr_err;
1432         uint8_t zero16[16];
1433         bool do_newer_keys = false;
1434         bool do_cleartext = false;
1435
1436         ZERO_STRUCT(zero16);
1437         ZERO_STRUCT(names);
1438
1439         ldb = ldb_module_get_ctx(io->ac->module);
1440
1441         if (!io->n.cleartext_utf8) {
1442                 /*
1443                  * when we don't have a cleartext password
1444                  * we can't setup a supplementalCredential value
1445                  */
1446                 return LDB_SUCCESS;
1447         }
1448
1449         /* if there's an old supplementaCredentials blob then parse it */
1450         if (io->o.supplemental) {
1451                 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
1452                                                    &_old_scb,
1453                                                    (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
1454                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1455                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1456                         ldb_asprintf_errstring(ldb,
1457                                                "setup_supplemental_field: "
1458                                                "failed to pull old supplementalCredentialsBlob: %s",
1459                                                nt_errstr(status));
1460                         return LDB_ERR_OPERATIONS_ERROR;
1461                 }
1462
1463                 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
1464                         old_scb = &_old_scb;
1465                 } else {
1466                         ldb_debug(ldb, LDB_DEBUG_ERROR,
1467                                                "setup_supplemental_field: "
1468                                                "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
1469                                                _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
1470                 }
1471         }
1472         /* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
1473         do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
1474
1475         if (io->ac->status->domain_data.store_cleartext &&
1476             (io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
1477                 do_cleartext = true;
1478         }
1479
1480         /*
1481          * The ordering is this
1482          *
1483          * Primary:Kerberos-Newer-Keys (optional)
1484          * Primary:Kerberos
1485          * Primary:WDigest
1486          * Primary:CLEARTEXT (optional)
1487          *
1488          * And the 'Packages' package is insert before the last
1489          * other package.
1490          */
1491         if (do_newer_keys) {
1492                 /* Primary:Kerberos-Newer-Keys */
1493                 nkn = &names[num_names++];
1494                 pkn = &packages[num_packages++];
1495         }
1496
1497         /* Primary:Kerberos */
1498         nk = &names[num_names++];
1499         pk = &packages[num_packages++];
1500
1501         if (!do_cleartext) {
1502                 /* Packages */
1503                 pp = &packages[num_packages++];
1504         }
1505
1506         /* Primary:WDigest */
1507         nd = &names[num_names++];
1508         pd = &packages[num_packages++];
1509
1510         if (do_cleartext) {
1511                 /* Packages */
1512                 pp = &packages[num_packages++];
1513
1514                 /* Primary:CLEARTEXT */
1515                 nc = &names[num_names++];
1516                 pc = &packages[num_packages++];
1517         }
1518
1519         if (pkn) {
1520                 /*
1521                  * setup 'Primary:Kerberos-Newer-Keys' element
1522                  */
1523                 *nkn = "Kerberos-Newer-Keys";
1524
1525                 ret = setup_primary_kerberos_newer(io, old_scb, &pknb);
1526                 if (ret != LDB_SUCCESS) {
1527                         return ret;
1528                 }
1529
1530                 ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
1531                                                &pknb,
1532                                                (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1533                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1534                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1535                         ldb_asprintf_errstring(ldb,
1536                                                "setup_supplemental_field: "
1537                                                "failed to push package_PrimaryKerberosNeverBlob: %s",
1538                                                nt_errstr(status));
1539                         return LDB_ERR_OPERATIONS_ERROR;
1540                 }
1541                 pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
1542                 if (!pknb_hexstr) {
1543                         return ldb_oom(ldb);
1544                 }
1545                 pkn->name       = "Primary:Kerberos-Newer-Keys";
1546                 pkn->reserved   = 1;
1547                 pkn->data       = pknb_hexstr;
1548         }
1549
1550         /*
1551          * setup 'Primary:Kerberos' element
1552          */
1553         *nk = "Kerberos";
1554
1555         ret = setup_primary_kerberos(io, old_scb, &pkb);
1556         if (ret != LDB_SUCCESS) {
1557                 return ret;
1558         }
1559
1560         ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
1561                                        &pkb,
1562                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
1563         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1564                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1565                 ldb_asprintf_errstring(ldb,
1566                                        "setup_supplemental_field: "
1567                                        "failed to push package_PrimaryKerberosBlob: %s",
1568                                        nt_errstr(status));
1569                 return LDB_ERR_OPERATIONS_ERROR;
1570         }
1571         pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
1572         if (!pkb_hexstr) {
1573                 return ldb_oom(ldb);
1574         }
1575         pk->name        = "Primary:Kerberos";
1576         pk->reserved    = 1;
1577         pk->data        = pkb_hexstr;
1578
1579         /*
1580          * setup 'Primary:WDigest' element
1581          */
1582         *nd = "WDigest";
1583
1584         ret = setup_primary_wdigest(io, old_scb, &pdb);
1585         if (ret != LDB_SUCCESS) {
1586                 return ret;
1587         }
1588
1589         ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
1590                                        &pdb,
1591                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
1592         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1593                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1594                 ldb_asprintf_errstring(ldb,
1595                                        "setup_supplemental_field: "
1596                                        "failed to push package_PrimaryWDigestBlob: %s",
1597                                        nt_errstr(status));
1598                 return LDB_ERR_OPERATIONS_ERROR;
1599         }
1600         pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
1601         if (!pdb_hexstr) {
1602                 return ldb_oom(ldb);
1603         }
1604         pd->name        = "Primary:WDigest";
1605         pd->reserved    = 1;
1606         pd->data        = pdb_hexstr;
1607
1608         /*
1609          * setup 'Primary:CLEARTEXT' element
1610          */
1611         if (pc) {
1612                 *nc             = "CLEARTEXT";
1613
1614                 pcb.cleartext   = *io->n.cleartext_utf16;
1615
1616                 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
1617                                                &pcb,
1618                                                (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
1619                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1620                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1621                         ldb_asprintf_errstring(ldb,
1622                                                "setup_supplemental_field: "
1623                                                "failed to push package_PrimaryCLEARTEXTBlob: %s",
1624                                                nt_errstr(status));
1625                         return LDB_ERR_OPERATIONS_ERROR;
1626                 }
1627                 pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
1628                 if (!pcb_hexstr) {
1629                         return ldb_oom(ldb);
1630                 }
1631                 pc->name        = "Primary:CLEARTEXT";
1632                 pc->reserved    = 1;
1633                 pc->data        = pcb_hexstr;
1634         }
1635
1636         /*
1637          * setup 'Packages' element
1638          */
1639         pb.names = names;
1640         ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1641                                        &pb,
1642                                        (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1643         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1644                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1645                 ldb_asprintf_errstring(ldb,
1646                                        "setup_supplemental_field: "
1647                                        "failed to push package_PackagesBlob: %s",
1648                                        nt_errstr(status));
1649                 return LDB_ERR_OPERATIONS_ERROR;
1650         }
1651         pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
1652         if (!pb_hexstr) {
1653                 return ldb_oom(ldb);
1654         }
1655         pp->name        = "Packages";
1656         pp->reserved    = 2;
1657         pp->data        = pb_hexstr;
1658
1659         /*
1660          * setup 'supplementalCredentials' value
1661          */
1662         ZERO_STRUCT(scb);
1663         scb.sub.num_packages    = num_packages;
1664         scb.sub.packages        = packages;
1665
1666         ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1667                                        &scb,
1668                                        (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1669         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1670                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1671                 ldb_asprintf_errstring(ldb,
1672                                        "setup_supplemental_field: "
1673                                        "failed to push supplementalCredentialsBlob: %s",
1674                                        nt_errstr(status));
1675                 return LDB_ERR_OPERATIONS_ERROR;
1676         }
1677
1678         return LDB_SUCCESS;
1679 }
1680
1681 static int setup_last_set_field(struct setup_password_fields_io *io)
1682 {
1683         const struct ldb_message *msg = NULL;
1684
1685         switch (io->ac->req->operation) {
1686         case LDB_ADD:
1687                 msg = io->ac->req->op.add.message;
1688                 break;
1689         case LDB_MODIFY:
1690                 msg = io->ac->req->op.mod.message;
1691                 break;
1692         default:
1693                 return LDB_ERR_OPERATIONS_ERROR;
1694                 break;
1695         }
1696
1697         if (io->ac->pwd_last_set_bypass) {
1698                 struct ldb_message_element *el;
1699
1700                 if (msg == NULL) {
1701                         return LDB_ERR_CONSTRAINT_VIOLATION;
1702                 }
1703
1704                 el = ldb_msg_find_element(msg, "pwdLastSet");
1705                 if (el == NULL) {
1706                         return LDB_ERR_CONSTRAINT_VIOLATION;
1707                 }
1708
1709                 io->g.last_set = samdb_result_nttime(msg, "pwdLastSet", 0);
1710                 return LDB_SUCCESS;
1711         }
1712
1713         /* set it as now */
1714         unix_to_nt_time(&io->g.last_set, time(NULL));
1715
1716         return LDB_SUCCESS;
1717 }
1718
1719 static int setup_given_passwords(struct setup_password_fields_io *io,
1720                                  struct setup_password_fields_given *g)
1721 {
1722         struct ldb_context *ldb;
1723         bool ok;
1724
1725         ldb = ldb_module_get_ctx(io->ac->module);
1726
1727         if (g->cleartext_utf8) {
1728                 struct ldb_val *cleartext_utf16_blob;
1729
1730                 cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
1731                 if (!cleartext_utf16_blob) {
1732                         return ldb_oom(ldb);
1733                 }
1734                 if (!convert_string_talloc(io->ac,
1735                                            CH_UTF8, CH_UTF16,
1736                                            g->cleartext_utf8->data,
1737                                            g->cleartext_utf8->length,
1738                                            (void *)&cleartext_utf16_blob->data,
1739                                            &cleartext_utf16_blob->length)) {
1740                         if (g->cleartext_utf8->length != 0) {
1741                                 talloc_free(cleartext_utf16_blob);
1742                                 ldb_asprintf_errstring(ldb,
1743                                                        "setup_password_fields: "
1744                                                        "failed to generate UTF16 password from cleartext UTF8 one for user '%s'!",
1745                                                        io->u.sAMAccountName);
1746                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1747                         } else {
1748                                 /* passwords with length "0" are valid! */
1749                                 cleartext_utf16_blob->data = NULL;
1750                                 cleartext_utf16_blob->length = 0;
1751                         }
1752                 }
1753                 g->cleartext_utf16 = cleartext_utf16_blob;
1754         } else if (g->cleartext_utf16) {
1755                 struct ldb_val *cleartext_utf8_blob;
1756
1757                 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
1758                 if (!cleartext_utf8_blob) {
1759                         return ldb_oom(ldb);
1760                 }
1761                 if (!convert_string_talloc(io->ac,
1762                                            CH_UTF16MUNGED, CH_UTF8,
1763                                            g->cleartext_utf16->data,
1764                                            g->cleartext_utf16->length,
1765                                            (void *)&cleartext_utf8_blob->data,
1766                                            &cleartext_utf8_blob->length)) {
1767                         if (g->cleartext_utf16->length != 0) {
1768                                 /* We must bail out here, the input wasn't even
1769                                  * a multiple of 2 bytes */
1770                                 talloc_free(cleartext_utf8_blob);
1771                                 ldb_asprintf_errstring(ldb,
1772                                                        "setup_password_fields: "
1773                                                        "failed to generate UTF8 password from cleartext UTF 16 one for user '%s' - the latter had odd length (length must be a multiple of 2)!",
1774                                                        io->u.sAMAccountName);
1775                                 return LDB_ERR_CONSTRAINT_VIOLATION;
1776                         } else {
1777                                 /* passwords with length "0" are valid! */
1778                                 cleartext_utf8_blob->data = NULL;
1779                                 cleartext_utf8_blob->length = 0;
1780                         }
1781                 }
1782                 g->cleartext_utf8 = cleartext_utf8_blob;
1783         }
1784
1785         if (g->cleartext_utf16) {
1786                 struct samr_Password *nt_hash;
1787
1788                 nt_hash = talloc(io->ac, struct samr_Password);
1789                 if (!nt_hash) {
1790                         return ldb_oom(ldb);
1791                 }
1792                 g->nt_hash = nt_hash;
1793
1794                 /* compute the new nt hash */
1795                 mdfour(nt_hash->hash,
1796                        g->cleartext_utf16->data,
1797                        g->cleartext_utf16->length);
1798         }
1799
1800         if (g->cleartext_utf8) {
1801                 struct samr_Password *lm_hash;
1802
1803                 lm_hash = talloc(io->ac, struct samr_Password);
1804                 if (!lm_hash) {
1805                         return ldb_oom(ldb);
1806                 }
1807
1808                 /* compute the new lm hash */
1809                 ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
1810                 if (ok) {
1811                         g->lm_hash = lm_hash;
1812                 } else {
1813                         talloc_free(lm_hash);
1814                 }
1815         }
1816
1817         return LDB_SUCCESS;
1818 }
1819
1820 static int setup_password_fields(struct setup_password_fields_io *io)
1821 {
1822         struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
1823         struct loadparm_context *lp_ctx =
1824                 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
1825                                          struct loadparm_context);
1826         int ret;
1827
1828         /* transform the old password (for password changes) */
1829         ret = setup_given_passwords(io, &io->og);
1830         if (ret != LDB_SUCCESS) {
1831                 return ret;
1832         }
1833
1834         /* transform the new password */
1835         ret = setup_given_passwords(io, &io->n);
1836         if (ret != LDB_SUCCESS) {
1837                 return ret;
1838         }
1839
1840         if (io->n.cleartext_utf8) {
1841                 ret = setup_kerberos_keys(io);
1842                 if (ret != LDB_SUCCESS) {
1843                         return ret;
1844                 }
1845         }
1846
1847         ret = setup_nt_fields(io);
1848         if (ret != LDB_SUCCESS) {
1849                 return ret;
1850         }
1851
1852         if (lpcfg_lanman_auth(lp_ctx)) {
1853                 ret = setup_lm_fields(io);
1854                 if (ret != LDB_SUCCESS) {
1855                         return ret;
1856                 }
1857         } else {
1858                 io->g.lm_hash = NULL;
1859                 io->g.lm_history_len = 0;
1860         }
1861
1862         ret = setup_supplemental_field(io);
1863         if (ret != LDB_SUCCESS) {
1864                 return ret;
1865         }
1866
1867         ret = setup_last_set_field(io);
1868         if (ret != LDB_SUCCESS) {
1869                 return ret;
1870         }
1871
1872         return LDB_SUCCESS;
1873 }
1874
1875 static int check_password_restrictions(struct setup_password_fields_io *io)
1876 {
1877         struct ldb_context *ldb;
1878         int ret;
1879
1880         ldb = ldb_module_get_ctx(io->ac->module);
1881
1882         /* First check the old password is correct, for password changes */
1883         if (!io->ac->pwd_reset) {
1884                 bool nt_hash_checked = false;
1885
1886                 /* we need the old nt or lm hash given by the client */
1887                 if (!io->og.nt_hash && !io->og.lm_hash) {
1888                         ldb_asprintf_errstring(ldb,
1889                                 "check_password_restrictions: "
1890                                 "You need to provide the old password in order "
1891                                 "to change it!");
1892                         return LDB_ERR_UNWILLING_TO_PERFORM;
1893                 }
1894
1895                 /* The password modify through the NT hash is encouraged and
1896                    has no problems at all */
1897                 if (io->og.nt_hash) {
1898                         if (!io->o.nt_hash || memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
1899                                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1900                                 ldb_asprintf_errstring(ldb,
1901                                         "%08X: %s - check_password_restrictions: "
1902                                         "The old password specified doesn't match!",
1903                                         W_ERROR_V(WERR_INVALID_PASSWORD),
1904                                         ldb_strerror(ret));
1905                                 return ret;
1906                         }
1907
1908                         nt_hash_checked = true;
1909                 }
1910
1911                 /* But it is also possible to change a password by the LM hash
1912                  * alone for compatibility reasons. This check is optional if
1913                  * the NT hash was already checked - otherwise it's mandatory.
1914                  * (as the SAMR operations request it). */
1915                 if (io->og.lm_hash) {
1916                         if ((!io->o.lm_hash && !nt_hash_checked)
1917                             || (io->o.lm_hash && memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0)) {
1918                                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1919                                 ldb_asprintf_errstring(ldb,
1920                                         "%08X: %s - check_password_restrictions: "
1921                                         "The old password specified doesn't match!",
1922                                         W_ERROR_V(WERR_INVALID_PASSWORD),
1923                                         ldb_strerror(ret));
1924                                 return ret;
1925                         }
1926                 }
1927         }
1928
1929         if (io->u.restrictions == 0) {
1930                 /* FIXME: Is this right? */
1931                 return LDB_SUCCESS;
1932         }
1933
1934         /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
1935         if ((io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) &&
1936             !io->ac->pwd_reset)
1937         {
1938                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
1939                 ldb_asprintf_errstring(ldb,
1940                         "%08X: %s - check_password_restrictions: "
1941                         "password is too young to change!",
1942                         W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1943                         ldb_strerror(ret));
1944                 return ret;
1945         }
1946
1947         /*
1948          * Fundamental password checks done by the call
1949          * "samdb_check_password".
1950          * It is also in use by "dcesrv_samr_ValidatePassword".
1951          */
1952         if (io->n.cleartext_utf8 != NULL) {
1953                 enum samr_ValidationStatus vstat;
1954                 vstat = samdb_check_password(io->n.cleartext_utf8,
1955                                              io->ac->status->domain_data.pwdProperties,
1956                                              io->ac->status->domain_data.minPwdLength);
1957                 switch (vstat) {
1958                 case SAMR_VALIDATION_STATUS_SUCCESS:
1959                                 /* perfect -> proceed! */
1960                         break;
1961
1962                 case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
1963                         ret = LDB_ERR_CONSTRAINT_VIOLATION;
1964                         ldb_asprintf_errstring(ldb,
1965                                 "%08X: %s - check_password_restrictions: "
1966                                 "the password is too short. It should be equal or longer than %u characters!",
1967                                 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1968                                 ldb_strerror(ret),
1969                                 io->ac->status->domain_data.minPwdLength);
1970                         io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
1971                         return ret;
1972
1973                 case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
1974                         ret = LDB_ERR_CONSTRAINT_VIOLATION;
1975                         ldb_asprintf_errstring(ldb,
1976                                 "%08X: %s - check_password_restrictions: "
1977                                 "the password does not meet the complexity criteria!",
1978                                 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1979                                 ldb_strerror(ret));
1980                         io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
1981                         return ret;
1982
1983                 default:
1984                         ret = LDB_ERR_CONSTRAINT_VIOLATION;
1985                         ldb_asprintf_errstring(ldb,
1986                                 "%08X: %s - check_password_restrictions: "
1987                                 "the password doesn't fit by a certain reason!",
1988                                 W_ERROR_V(WERR_PASSWORD_RESTRICTION),
1989                                 ldb_strerror(ret));
1990                         return ret;
1991                 }
1992         }
1993
1994         if (io->ac->pwd_reset) {
1995                 return LDB_SUCCESS;
1996         }
1997
1998         if (io->n.nt_hash) {
1999                 uint32_t i;
2000
2001                 /* checks the NT hash password history */
2002                 for (i = 0; i < io->o.nt_history_len; i++) {
2003                         ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
2004                         if (ret == 0) {
2005                                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2006                                 ldb_asprintf_errstring(ldb,
2007                                         "%08X: %s - check_password_restrictions: "
2008                                         "the password was already used (in history)!",
2009                                         W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2010                                         ldb_strerror(ret));
2011                                 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2012                                 return ret;
2013                         }
2014                 }
2015         }
2016
2017         if (io->n.lm_hash) {
2018                 uint32_t i;
2019
2020                 /* checks the LM hash password history */
2021                 for (i = 0; i < io->o.lm_history_len; i++) {
2022                         ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
2023                         if (ret == 0) {
2024                                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2025                                 ldb_asprintf_errstring(ldb,
2026                                         "%08X: %s - check_password_restrictions: "
2027                                         "the password was already used (in history)!",
2028                                         W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2029                                         ldb_strerror(ret));
2030                                 io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
2031                                 return ret;
2032                         }
2033                 }
2034         }
2035
2036         /* are all password changes disallowed? */
2037         if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
2038                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2039                 ldb_asprintf_errstring(ldb,
2040                         "%08X: %s - check_password_restrictions: "
2041                         "password changes disabled!",
2042                         W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2043                         ldb_strerror(ret));
2044                 return ret;
2045         }
2046
2047         /* can this user change the password? */
2048         if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
2049                 ret = LDB_ERR_CONSTRAINT_VIOLATION;
2050                 ldb_asprintf_errstring(ldb,
2051                         "%08X: %s - check_password_restrictions: "
2052                         "password can't be changed on this account!",
2053                         W_ERROR_V(WERR_PASSWORD_RESTRICTION),
2054                         ldb_strerror(ret));
2055                 return ret;
2056         }
2057
2058         return LDB_SUCCESS;
2059 }
2060
2061 /*
2062  * This is intended for use by the "password_hash" module since there
2063  * password changes can be specified through one message element with the
2064  * new password (to set) and another one with the old password (to unset).
2065  *
2066  * The first which sets a password (new value) can have flags
2067  * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
2068  * for entries). The latter (old value) has always specified
2069  * LDB_FLAG_MOD_DELETE.
2070  *
2071  * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
2072  * matching message elements are malformed in respect to the set/change rules.
2073  * Otherwise it returns LDB_SUCCESS.
2074  */
2075 static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
2076                                         const char *name,
2077                                         enum ldb_request_type operation,
2078                                         const struct ldb_val **new_val,
2079                                         const struct ldb_val **old_val)
2080 {
2081         unsigned int i;
2082
2083         *new_val = NULL;
2084         *old_val = NULL;
2085
2086         if (msg == NULL) {
2087                 return LDB_SUCCESS;
2088         }
2089
2090         for (i = 0; i < msg->num_elements; i++) {
2091                 if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
2092                         continue;
2093                 }
2094
2095                 if ((operation == LDB_MODIFY) &&
2096                     (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
2097                         /* 0 values are allowed */
2098                         if (msg->elements[i].num_values == 1) {
2099                                 *old_val = &msg->elements[i].values[0];
2100                         } else if (msg->elements[i].num_values > 1) {
2101                                 return LDB_ERR_CONSTRAINT_VIOLATION;
2102                         }
2103                 } else if ((operation == LDB_MODIFY) &&
2104                            (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
2105                         if (msg->elements[i].num_values > 0) {
2106                                 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2107                         } else {
2108                                 return LDB_ERR_UNWILLING_TO_PERFORM;
2109                         }
2110                 } else {
2111                         /* Add operations and LDB_FLAG_MOD_ADD */
2112                         if (msg->elements[i].num_values > 0) {
2113                                 *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
2114                         } else {
2115                                 return LDB_ERR_CONSTRAINT_VIOLATION;
2116                         }
2117                 }
2118         }
2119
2120         return LDB_SUCCESS;
2121 }
2122
2123 static int setup_io(struct ph_context *ac,
2124                     const struct ldb_message *orig_msg,
2125                     const struct ldb_message *searched_msg,
2126                     struct setup_password_fields_io *io)
2127 {
2128         const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
2129         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
2130         struct loadparm_context *lp_ctx =
2131                 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2132                                          struct loadparm_context);
2133         int ret;
2134
2135         ZERO_STRUCTP(io);
2136
2137         /* Some operations below require kerberos contexts */
2138
2139         if (smb_krb5_init_context(ac,
2140                                   ldb_get_event_context(ldb),
2141                                   (struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
2142                                   &io->smb_krb5_context) != 0) {
2143                 return ldb_operr(ldb);
2144         }
2145
2146         io->ac                          = ac;
2147
2148         io->u.userAccountControl        = ldb_msg_find_attr_as_uint(searched_msg,
2149                                                                     "userAccountControl", 0);
2150         io->u.pwdLastSet                = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
2151         io->u.sAMAccountName            = ldb_msg_find_attr_as_string(searched_msg,
2152                                                                       "sAMAccountName", NULL);
2153         io->u.user_principal_name       = ldb_msg_find_attr_as_string(searched_msg,
2154                                                                       "userPrincipalName", NULL);
2155         io->u.is_computer               = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
2156
2157         if (io->u.sAMAccountName == NULL) {
2158                 ldb_asprintf_errstring(ldb,
2159                                        "setup_io: sAMAccountName attribute is missing on %s for attempted password set/change",
2160                                        ldb_dn_get_linearized(searched_msg->dn));
2161
2162                 return LDB_ERR_CONSTRAINT_VIOLATION;
2163         }
2164
2165         /* Only non-trust accounts have restrictions (possibly this test is the
2166          * wrong way around, but we like to be restrictive if possible */
2167         io->u.restrictions = !(io->u.userAccountControl
2168                 & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
2169                         | UF_SERVER_TRUST_ACCOUNT));
2170
2171         if (ac->userPassword) {
2172                 ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
2173                                                    ac->req->operation,
2174                                                    &io->n.cleartext_utf8,
2175                                                    &io->og.cleartext_utf8);
2176                 if (ret != LDB_SUCCESS) {
2177                         ldb_asprintf_errstring(ldb,
2178                                 "setup_io: "
2179                                 "it's only allowed to set the old password once!");
2180                         return ret;
2181                 }
2182         }
2183
2184         if (io->n.cleartext_utf8 != NULL) {
2185                 struct ldb_val *cleartext_utf8_blob;
2186                 char *p;
2187
2188                 cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
2189                 if (!cleartext_utf8_blob) {
2190                         return ldb_oom(ldb);
2191                 }
2192
2193                 *cleartext_utf8_blob = *io->n.cleartext_utf8;
2194
2195                 /* make sure we have a null terminated string */
2196                 p = talloc_strndup(cleartext_utf8_blob,
2197                                    (const char *)io->n.cleartext_utf8->data,
2198                                    io->n.cleartext_utf8->length);
2199                 if ((p == NULL) && (io->n.cleartext_utf8->length > 0)) {
2200                         return ldb_oom(ldb);
2201                 }
2202                 cleartext_utf8_blob->data = (uint8_t *)p;
2203
2204                 io->n.cleartext_utf8 = cleartext_utf8_blob;
2205         }
2206
2207         ret = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
2208                                            ac->req->operation,
2209                                            &io->n.cleartext_utf16,
2210                                            &io->og.cleartext_utf16);
2211         if (ret != LDB_SUCCESS) {
2212                 ldb_asprintf_errstring(ldb,
2213                         "setup_io: "
2214                         "it's only allowed to set the old password once!");
2215                 return ret;
2216         }
2217
2218         /* this rather strange looking piece of code is there to
2219            handle a ldap client setting a password remotely using the
2220            unicodePwd ldap field. The syntax is that the password is
2221            in UTF-16LE, with a " at either end. Unfortunately the
2222            unicodePwd field is also used to store the nt hashes
2223            internally in Samba, and is used in the nt hash format on
2224            the wire in DRS replication, so we have a single name for
2225            two distinct values. The code below leaves us with a small
2226            chance (less than 1 in 2^32) of a mixup, if someone manages
2227            to create a MD4 hash which starts and ends in 0x22 0x00, as
2228            that would then be treated as a UTF16 password rather than
2229            a nthash */
2230
2231         ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
2232                                            ac->req->operation,
2233                                            &quoted_utf16,
2234                                            &old_quoted_utf16);
2235         if (ret != LDB_SUCCESS) {
2236                 ldb_asprintf_errstring(ldb,
2237                         "setup_io: "
2238                         "it's only allowed to set the old password once!");
2239                 return ret;
2240         }
2241
2242         /* Checks and converts the actual "unicodePwd" attribute */
2243         if (!ac->hash_values &&
2244             quoted_utf16 &&
2245             quoted_utf16->length >= 4 &&
2246             quoted_utf16->data[0] == '"' &&
2247             quoted_utf16->data[1] == 0 &&
2248             quoted_utf16->data[quoted_utf16->length-2] == '"' &&
2249             quoted_utf16->data[quoted_utf16->length-1] == 0) {
2250                 struct ldb_val *quoted_utf16_2;
2251
2252                 if (io->n.cleartext_utf16) {
2253                         /* refuse the change if someone wants to change with
2254                            with both UTF16 possibilities at the same time... */
2255                         ldb_asprintf_errstring(ldb,
2256                                 "setup_io: "
2257                                 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2258                         return LDB_ERR_UNWILLING_TO_PERFORM;
2259                 }
2260
2261                 /*
2262                  * adapt the quoted UTF16 string to be a real
2263                  * cleartext one
2264                  */
2265                 quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2266                 if (quoted_utf16_2 == NULL) {
2267                         return ldb_oom(ldb);
2268                 }
2269
2270                 quoted_utf16_2->data = quoted_utf16->data + 2;
2271                 quoted_utf16_2->length = quoted_utf16->length-4;
2272                 io->n.cleartext_utf16 = quoted_utf16_2;
2273                 io->n.nt_hash = NULL;
2274
2275         } else if (quoted_utf16) {
2276                 /* We have only the hash available -> so no plaintext here */
2277                 if (!ac->hash_values) {
2278                         /* refuse the change if someone wants to change
2279                            the hash without control specified... */
2280                         ldb_asprintf_errstring(ldb,
2281                                 "setup_io: "
2282                                 "it's not allowed to set the NT hash password directly'");
2283                         /* this looks odd but this is what Windows does:
2284                            returns "UNWILLING_TO_PERFORM" on wrong
2285                            password sets and "CONSTRAINT_VIOLATION" on
2286                            wrong password changes. */
2287                         if (old_quoted_utf16 == NULL) {
2288                                 return LDB_ERR_UNWILLING_TO_PERFORM;
2289                         }
2290
2291                         return LDB_ERR_CONSTRAINT_VIOLATION;
2292                 }
2293
2294                 io->n.nt_hash = talloc(io->ac, struct samr_Password);
2295                 memcpy(io->n.nt_hash->hash, quoted_utf16->data,
2296                        MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
2297         }
2298
2299         /* Checks and converts the previous "unicodePwd" attribute */
2300         if (!ac->hash_values &&
2301             old_quoted_utf16 &&
2302             old_quoted_utf16->length >= 4 &&
2303             old_quoted_utf16->data[0] == '"' &&
2304             old_quoted_utf16->data[1] == 0 &&
2305             old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
2306             old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
2307                 struct ldb_val *old_quoted_utf16_2;
2308
2309                 if (io->og.cleartext_utf16) {
2310                         /* refuse the change if someone wants to change with
2311                            both UTF16 possibilities at the same time... */
2312                         ldb_asprintf_errstring(ldb,
2313                                 "setup_io: "
2314                                 "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
2315                         return LDB_ERR_UNWILLING_TO_PERFORM;
2316                 }
2317
2318                 /*
2319                  * adapt the quoted UTF16 string to be a real
2320                  * cleartext one
2321                  */
2322                 old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
2323                 if (old_quoted_utf16_2 == NULL) {
2324                         return ldb_oom(ldb);
2325                 }
2326
2327                 old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
2328                 old_quoted_utf16_2->length = old_quoted_utf16->length-4;
2329
2330                 io->og.cleartext_utf16 = old_quoted_utf16_2;
2331                 io->og.nt_hash = NULL;
2332         } else if (old_quoted_utf16) {
2333                 /* We have only the hash available -> so no plaintext here */
2334                 if (!ac->hash_values) {
2335                         /* refuse the change if someone wants to change
2336                            the hash without control specified... */
2337                         ldb_asprintf_errstring(ldb,
2338                                 "setup_io: "
2339                                 "it's not allowed to set the NT hash password directly'");
2340                         return LDB_ERR_UNWILLING_TO_PERFORM;
2341                 }
2342
2343                 io->og.nt_hash = talloc(io->ac, struct samr_Password);
2344                 memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
2345                        MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
2346         }
2347
2348         /* Handles the "dBCSPwd" attribute (LM hash) */
2349         io->n.lm_hash = NULL; io->og.lm_hash = NULL;
2350         ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
2351                                            ac->req->operation,
2352                                            &lm_hash, &old_lm_hash);
2353         if (ret != LDB_SUCCESS) {
2354                 ldb_asprintf_errstring(ldb,
2355                         "setup_io: "
2356                         "it's only allowed to set the old password once!");
2357                 return ret;
2358         }
2359
2360         if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
2361                 /* refuse the change if someone wants to change the hash
2362                    without control specified... */
2363                 ldb_asprintf_errstring(ldb,
2364                         "setup_io: "
2365                         "it's not allowed to set the LM hash password directly'");
2366                 return LDB_ERR_UNWILLING_TO_PERFORM;
2367         }
2368
2369         if (lpcfg_lanman_auth(lp_ctx) && (lm_hash != NULL)) {
2370                 io->n.lm_hash = talloc(io->ac, struct samr_Password);
2371                 memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
2372                        sizeof(io->n.lm_hash->hash)));
2373         }
2374         if (lpcfg_lanman_auth(lp_ctx) && (old_lm_hash != NULL)) {
2375                 io->og.lm_hash = talloc(io->ac, struct samr_Password);
2376                 memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
2377                        sizeof(io->og.lm_hash->hash)));
2378         }
2379
2380         /*
2381          * Handles the password change control if it's specified. It has the
2382          * precedance and overrides already specified old password values of
2383          * change requests (but that shouldn't happen since the control is
2384          * fully internal and only used in conjunction with replace requests!).
2385          */
2386         if (ac->change != NULL) {
2387                 io->og.nt_hash = NULL;
2388                 if (ac->change->old_nt_pwd_hash != NULL) {
2389                         io->og.nt_hash = talloc_memdup(io->ac,
2390                                                        ac->change->old_nt_pwd_hash,
2391                                                        sizeof(struct samr_Password));
2392                 }
2393                 io->og.lm_hash = NULL;
2394                 if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
2395                         io->og.lm_hash = talloc_memdup(io->ac,
2396                                                        ac->change->old_lm_pwd_hash,
2397                                                        sizeof(struct samr_Password));
2398                 }
2399         }
2400
2401         /* refuse the change if someone wants to change the clear-
2402            text and supply his own hashes at the same time... */
2403         if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
2404                         && (io->n.nt_hash || io->n.lm_hash)) {
2405                 ldb_asprintf_errstring(ldb,
2406                         "setup_io: "
2407                         "it's only allowed to set the password in form of cleartext attributes or as hashes");
2408                 return LDB_ERR_UNWILLING_TO_PERFORM;
2409         }
2410
2411         /* refuse the change if someone wants to change the password
2412            using both plaintext methods (UTF8 and UTF16) at the same time... */
2413         if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
2414                 ldb_asprintf_errstring(ldb,
2415                         "setup_io: "
2416                         "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2417                 return LDB_ERR_UNWILLING_TO_PERFORM;
2418         }
2419
2420         /* refuse the change if someone tries to set/change the password by
2421          * the lanman hash alone and we've deactivated that mechanism. This
2422          * would end in an account without any password! */
2423         if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
2424             && (!io->n.nt_hash) && (!io->n.lm_hash)) {
2425                 ldb_asprintf_errstring(ldb,
2426                         "setup_io: "
2427                         "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
2428                 /* on "userPassword" and "clearTextPassword" we've to return
2429                  * something different, since these are virtual attributes */
2430                 if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
2431                     (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
2432                         return LDB_ERR_CONSTRAINT_VIOLATION;
2433                 }
2434                 return LDB_ERR_UNWILLING_TO_PERFORM;
2435         }
2436
2437         /* refuse the change if someone wants to compare against a plaintext
2438            or hash at the same time for a "password modify" operation... */
2439         if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
2440             && (io->og.nt_hash || io->og.lm_hash)) {
2441                 ldb_asprintf_errstring(ldb,
2442                         "setup_io: "
2443                         "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
2444                 return LDB_ERR_UNWILLING_TO_PERFORM;
2445         }
2446
2447         /* refuse the change if someone wants to compare against both
2448          * plaintexts at the same time for a "password modify" operation... */
2449         if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
2450                 ldb_asprintf_errstring(ldb,
2451                         "setup_io: "
2452                         "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
2453                 return LDB_ERR_UNWILLING_TO_PERFORM;
2454         }
2455
2456         /* Decides if we have a password modify or password reset operation */
2457         if (ac->req->operation == LDB_ADD) {
2458                 /* On "add" we have only "password reset" */
2459                 ac->pwd_reset = true;
2460         } else if (ac->req->operation == LDB_MODIFY) {
2461                 if (io->og.cleartext_utf8 || io->og.cleartext_utf16
2462                     || io->og.nt_hash || io->og.lm_hash) {
2463                         /* If we have an old password specified then for sure it
2464                          * is a user "password change" */
2465                         ac->pwd_reset = false;
2466                 } else {
2467                         /* Otherwise we have also here a "password reset" */
2468                         ac->pwd_reset = true;
2469                 }
2470         } else {
2471                 /* this shouldn't happen */
2472                 return ldb_operr(ldb);
2473         }
2474
2475         return LDB_SUCCESS;
2476 }
2477
2478 static struct ph_context *ph_init_context(struct ldb_module *module,
2479                                           struct ldb_request *req,
2480                                           bool userPassword)
2481 {
2482         struct ldb_context *ldb;
2483         struct ph_context *ac;
2484
2485         ldb = ldb_module_get_ctx(module);
2486
2487         ac = talloc_zero(req, struct ph_context);
2488         if (ac == NULL) {
2489                 ldb_set_errstring(ldb, "Out of Memory");
2490                 return NULL;
2491         }
2492
2493         ac->module = module;
2494         ac->req = req;
2495         ac->userPassword = userPassword;
2496
2497         return ac;
2498 }
2499
2500 static void ph_apply_controls(struct ph_context *ac)
2501 {
2502         struct ldb_control *ctrl;
2503
2504         ac->change_status = false;
2505         ctrl = ldb_request_get_control(ac->req,
2506                                        DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
2507         if (ctrl != NULL) {
2508                 ac->change_status = true;
2509
2510                 /* Mark the "change status" control as uncritical (done) */
2511                 ctrl->critical = false;
2512         }
2513
2514         ac->hash_values = false;
2515         ctrl = ldb_request_get_control(ac->req,
2516                                        DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
2517         if (ctrl != NULL) {
2518                 ac->hash_values = true;
2519
2520                 /* Mark the "hash values" control as uncritical (done) */
2521                 ctrl->critical = false;
2522         }
2523
2524         ctrl = ldb_request_get_control(ac->req,
2525                                        DSDB_CONTROL_PASSWORD_CHANGE_OID);
2526         if (ctrl != NULL) {
2527                 ac->change = (struct dsdb_control_password_change *) ctrl->data;
2528
2529                 /* Mark the "change" control as uncritical (done) */
2530                 ctrl->critical = false;
2531         }
2532
2533         ac->pwd_last_set_bypass = false;
2534         ctrl = ldb_request_get_control(ac->req,
2535                                 DSDB_CONTROL_PASSWORD_BYPASS_LAST_SET_OID);
2536         if (ctrl != NULL) {
2537                 ac->pwd_last_set_bypass = true;
2538
2539                 /* Mark the "bypass pwdLastSet" control as uncritical (done) */
2540                 ctrl->critical = false;
2541         }
2542 }
2543
2544 static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
2545 {
2546         struct ph_context *ac;
2547
2548         ac = talloc_get_type(req->context, struct ph_context);
2549
2550         if (!ares) {
2551                 return ldb_module_done(ac->req, NULL, NULL,
2552                                         LDB_ERR_OPERATIONS_ERROR);
2553         }
2554
2555         if (ares->type == LDB_REPLY_REFERRAL) {
2556                 return ldb_module_send_referral(ac->req, ares->referral);
2557         }
2558
2559         if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2560                 /* On success and trivial errors a status control is being
2561                  * added (used for example by the "samdb_set_password" call) */
2562                 ldb_reply_add_control(ares,
2563                                       DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2564                                       false,
2565                                       ac->status);
2566         }
2567
2568         if (ares->error != LDB_SUCCESS) {
2569                 return ldb_module_done(ac->req, ares->controls,
2570                                         ares->response, ares->error);
2571         }
2572
2573         if (ares->type != LDB_REPLY_DONE) {
2574                 talloc_free(ares);
2575                 return ldb_module_done(ac->req, NULL, NULL,
2576                                         LDB_ERR_OPERATIONS_ERROR);
2577         }
2578
2579         return ldb_module_done(ac->req, ares->controls,
2580                                 ares->response, ares->error);
2581 }
2582
2583 static int password_hash_add_do_add(struct ph_context *ac);
2584 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares);
2585 static int password_hash_mod_search_self(struct ph_context *ac);
2586 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares);
2587 static int password_hash_mod_do_mod(struct ph_context *ac);
2588
2589 static int get_domain_data_callback(struct ldb_request *req,
2590                                     struct ldb_reply *ares)
2591 {
2592         struct ldb_context *ldb;
2593         struct ph_context *ac;
2594         struct loadparm_context *lp_ctx;
2595         int ret = LDB_SUCCESS;
2596
2597         ac = talloc_get_type(req->context, struct ph_context);
2598         ldb = ldb_module_get_ctx(ac->module);
2599
2600         if (!ares) {
2601                 ret = LDB_ERR_OPERATIONS_ERROR;
2602                 goto done;
2603         }
2604         if (ares->error != LDB_SUCCESS) {
2605                 return ldb_module_done(ac->req, ares->controls,
2606                                         ares->response, ares->error);
2607         }
2608
2609         switch (ares->type) {
2610         case LDB_REPLY_ENTRY:
2611                 if (ac->status != NULL) {
2612                         talloc_free(ares);
2613
2614                         ldb_set_errstring(ldb, "Too many results");
2615                         ret = LDB_ERR_OPERATIONS_ERROR;
2616                         goto done;
2617                 }
2618
2619                 /* Setup the "status" structure (used as control later) */
2620                 ac->status = talloc_zero(ac->req,
2621                                          struct dsdb_control_password_change_status);
2622                 if (ac->status == NULL) {
2623                         talloc_free(ares);
2624
2625                         ldb_oom(ldb);
2626                         ret = LDB_ERR_OPERATIONS_ERROR;
2627                         goto done;
2628                 }
2629
2630                 /* Setup the "domain data" structure */
2631                 ac->status->domain_data.pwdProperties =
2632                         ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
2633                 ac->status->domain_data.pwdHistoryLength =
2634                         ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
2635                 ac->status->domain_data.maxPwdAge =
2636                         ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
2637                 ac->status->domain_data.minPwdAge =
2638                         ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
2639                 ac->status->domain_data.minPwdLength =
2640                         ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
2641                 ac->status->domain_data.store_cleartext =
2642                         ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
2643
2644                 talloc_free(ares);
2645
2646                 /* For a domain DN, this puts things in dotted notation */
2647                 /* For builtin domains, this will give details for the host,
2648                  * but that doesn't really matter, as it's just used for salt
2649                  * and kerberos principals, which don't exist here */
2650
2651                 lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
2652                                          struct loadparm_context);
2653
2654                 ac->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
2655                 ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
2656                 ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
2657
2658                 ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
2659
2660                 ret = LDB_SUCCESS;
2661                 break;
2662
2663         case LDB_REPLY_REFERRAL:
2664                 /* ignore */
2665                 talloc_free(ares);
2666                 ret = LDB_SUCCESS;
2667                 break;
2668
2669         case LDB_REPLY_DONE:
2670                 talloc_free(ares);
2671                 /* call the next step */
2672                 switch (ac->req->operation) {
2673                 case LDB_ADD:
2674                         ret = password_hash_add_do_add(ac);
2675                         break;
2676
2677                 case LDB_MODIFY:
2678                         ret = password_hash_mod_do_mod(ac);
2679                         break;
2680
2681                 default:
2682                         ret = LDB_ERR_OPERATIONS_ERROR;
2683                         break;
2684                 }
2685                 break;
2686         }
2687
2688 done:
2689         if (ret != LDB_SUCCESS) {
2690                 struct ldb_reply *new_ares;
2691
2692                 new_ares = talloc_zero(ac->req, struct ldb_reply);
2693                 if (new_ares == NULL) {
2694                         ldb_oom(ldb);
2695                         return ldb_module_done(ac->req, NULL, NULL,
2696                                                LDB_ERR_OPERATIONS_ERROR);
2697                 }
2698
2699                 new_ares->error = ret;
2700                 if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
2701                         /* On success and trivial errors a status control is being
2702                          * added (used for example by the "samdb_set_password" call) */
2703                         ldb_reply_add_control(new_ares,
2704                                               DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
2705                                               false,
2706                                               ac->status);
2707                 }
2708
2709                 return ldb_module_done(ac->req, new_ares->controls,
2710                                        new_ares->response, new_ares->error);
2711         }
2712
2713         return LDB_SUCCESS;
2714 }
2715
2716 static int build_domain_data_request(struct ph_context *ac)
2717 {
2718         /* attrs[] is returned from this function in
2719            ac->dom_req->op.search.attrs, so it must be static, as
2720            otherwise the compiler can put it on the stack */
2721         struct ldb_context *ldb;
2722         static const char * const attrs[] = { "pwdProperties",
2723                                               "pwdHistoryLength",
2724                                               "maxPwdAge",
2725                                               "minPwdAge",
2726                                               "minPwdLength",
2727                                               NULL };
2728         int ret;
2729
2730         ldb = ldb_module_get_ctx(ac->module);
2731
2732         ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
2733                                    ldb_get_default_basedn(ldb),
2734                                    LDB_SCOPE_BASE,
2735                                    NULL, attrs,
2736                                    NULL,
2737                                    ac, get_domain_data_callback,
2738                                    ac->req);
2739         LDB_REQ_SET_LOCATION(ac->dom_req);
2740         return ret;
2741 }
2742
2743 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
2744 {
2745         struct ldb_context *ldb;
2746         struct ph_context *ac;
2747         struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
2748                 *ntAttr, *lmAttr;
2749         int ret;
2750         struct ldb_control *bypass = NULL;
2751         bool userPassword = dsdb_user_password_support(module, req, req);
2752
2753         ldb = ldb_module_get_ctx(module);
2754
2755         ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
2756
2757         if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
2758                 return ldb_next_request(module, req);
2759         }
2760
2761         bypass = ldb_request_get_control(req,
2762                                          DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2763         if (bypass != NULL) {
2764                 /* Mark the "bypass" control as uncritical (done) */
2765                 bypass->critical = false;
2766                 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
2767                 return password_hash_bypass(module, req);
2768         }
2769
2770         /* nobody must touch password histories and 'supplementalCredentials' */
2771         if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
2772                 return LDB_ERR_UNWILLING_TO_PERFORM;
2773         }
2774         if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
2775                 return LDB_ERR_UNWILLING_TO_PERFORM;
2776         }
2777         if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
2778                 return LDB_ERR_UNWILLING_TO_PERFORM;
2779         }
2780
2781         /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2782          * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
2783
2784         userPasswordAttr = NULL;
2785         if (userPassword) {
2786                 userPasswordAttr = ldb_msg_find_element(req->op.add.message,
2787                                                         "userPassword");
2788                 /* MS-ADTS 3.1.1.3.1.5.2 */
2789                 if ((userPasswordAttr != NULL) &&
2790                     (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2791                         return LDB_ERR_CONSTRAINT_VIOLATION;
2792                 }
2793         }
2794         clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
2795         ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
2796         lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
2797
2798         if ((!userPasswordAttr) && (!clearTextPasswordAttr) && (!ntAttr) && (!lmAttr)) {
2799                 return ldb_next_request(module, req);
2800         }
2801
2802         /* Make sure we are performing the password set action on a (for us)
2803          * valid object. Those are instances of either "user" and/or
2804          * "inetOrgPerson". Otherwise continue with the submodules. */
2805         if ((!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "user"))
2806                 && (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "inetOrgPerson"))) {
2807
2808                 if (ldb_msg_find_element(req->op.add.message, "clearTextPassword") != NULL) {
2809                         ldb_set_errstring(ldb,
2810                                           "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
2811                         return LDB_ERR_NO_SUCH_ATTRIBUTE;
2812                 }
2813
2814                 return ldb_next_request(module, req);
2815         }
2816
2817         ac = ph_init_context(module, req, userPassword);
2818         if (ac == NULL) {
2819                 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
2820                 return ldb_operr(ldb);
2821         }
2822         ph_apply_controls(ac);
2823
2824         /* get user domain data */
2825         ret = build_domain_data_request(ac);
2826         if (ret != LDB_SUCCESS) {
2827                 return ret;
2828         }
2829
2830         return ldb_next_request(module, ac->dom_req);
2831 }
2832
2833 static int password_hash_add_do_add(struct ph_context *ac)
2834 {
2835         struct ldb_context *ldb;
2836         struct ldb_request *down_req;
2837         struct ldb_message *msg;
2838         struct setup_password_fields_io io;
2839         int ret;
2840
2841         /* Prepare the internal data structure containing the passwords */
2842         ret = setup_io(ac, ac->req->op.add.message, ac->req->op.add.message, &io);
2843         if (ret != LDB_SUCCESS) {
2844                 return ret;
2845         }
2846
2847         ldb = ldb_module_get_ctx(ac->module);
2848
2849         msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
2850         if (msg == NULL) {
2851                 return ldb_operr(ldb);
2852         }
2853
2854         /* remove attributes that we just read into 'io' */
2855         if (ac->userPassword) {
2856                 ldb_msg_remove_attr(msg, "userPassword");
2857         }
2858         ldb_msg_remove_attr(msg, "clearTextPassword");
2859         ldb_msg_remove_attr(msg, "unicodePwd");
2860         ldb_msg_remove_attr(msg, "dBCSPwd");
2861         ldb_msg_remove_attr(msg, "pwdLastSet");
2862
2863         ret = setup_password_fields(&io);
2864         if (ret != LDB_SUCCESS) {
2865                 return ret;
2866         }
2867
2868         ret = check_password_restrictions(&io);
2869         if (ret != LDB_SUCCESS) {
2870                 return ret;
2871         }
2872
2873         if (io.g.nt_hash) {
2874                 ret = samdb_msg_add_hash(ldb, ac, msg,
2875                                          "unicodePwd", io.g.nt_hash);
2876                 if (ret != LDB_SUCCESS) {
2877                         return ret;
2878                 }
2879         }
2880         if (io.g.lm_hash) {
2881                 ret = samdb_msg_add_hash(ldb, ac, msg,
2882                                          "dBCSPwd", io.g.lm_hash);
2883                 if (ret != LDB_SUCCESS) {
2884                         return ret;
2885                 }
2886         }
2887         if (io.g.nt_history_len > 0) {
2888                 ret = samdb_msg_add_hashes(ldb, ac, msg,
2889                                            "ntPwdHistory",
2890                                            io.g.nt_history,
2891                                            io.g.nt_history_len);
2892                 if (ret != LDB_SUCCESS) {
2893                         return ret;
2894                 }
2895         }
2896         if (io.g.lm_history_len > 0) {
2897                 ret = samdb_msg_add_hashes(ldb, ac, msg,
2898                                            "lmPwdHistory",
2899                                            io.g.lm_history,
2900                                            io.g.lm_history_len);
2901                 if (ret != LDB_SUCCESS) {
2902                         return ret;
2903                 }
2904         }
2905         if (io.g.supplemental.length > 0) {
2906                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
2907                                         &io.g.supplemental, NULL);
2908                 if (ret != LDB_SUCCESS) {
2909                         return ret;
2910                 }
2911         }
2912         ret = samdb_msg_add_uint64(ldb, ac, msg,
2913                                    "pwdLastSet",
2914                                    io.g.last_set);
2915         if (ret != LDB_SUCCESS) {
2916                 return ret;
2917         }
2918
2919         ret = ldb_build_add_req(&down_req, ldb, ac,
2920                                 msg,
2921                                 ac->req->controls,
2922                                 ac, ph_op_callback,
2923                                 ac->req);
2924         LDB_REQ_SET_LOCATION(down_req);
2925         if (ret != LDB_SUCCESS) {
2926                 return ret;
2927         }
2928
2929         return ldb_next_request(ac->module, down_req);
2930 }
2931
2932 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
2933 {
2934         struct ldb_context *ldb;
2935         struct ph_context *ac;
2936         const char *passwordAttrs[] = { "userPassword", "clearTextPassword",
2937                 "unicodePwd", "dBCSPwd", NULL }, **l;
2938         unsigned int attr_cnt, del_attr_cnt, add_attr_cnt, rep_attr_cnt;
2939         struct ldb_message_element *passwordAttr;
2940         struct ldb_message *msg;
2941         struct ldb_request *down_req;
2942         int ret;
2943         struct ldb_control *bypass = NULL;
2944         bool userPassword = dsdb_user_password_support(module, req, req);
2945
2946         ldb = ldb_module_get_ctx(module);
2947
2948         ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
2949
2950         if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
2951                 return ldb_next_request(module, req);
2952         }
2953
2954         bypass = ldb_request_get_control(req,
2955                                          DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
2956         if (bypass != NULL) {
2957                 /* Mark the "bypass" control as uncritical (done) */
2958                 bypass->critical = false;
2959                 ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
2960                 return password_hash_bypass(module, req);
2961         }
2962
2963         /* nobody must touch password histories and 'supplementalCredentials' */
2964         if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
2965                 return LDB_ERR_UNWILLING_TO_PERFORM;
2966         }
2967         if (ldb_msg_find_element(req->op.mod.message, "lmPwdHistory")) {
2968                 return LDB_ERR_UNWILLING_TO_PERFORM;
2969         }
2970         if (ldb_msg_find_element(req->op.mod.message, "supplementalCredentials")) {
2971                 return LDB_ERR_UNWILLING_TO_PERFORM;
2972         }
2973
2974         /* If no part of this touches the 'userPassword' OR 'clearTextPassword'
2975          * OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes.
2976          * For password changes/set there should be a 'delete' or a 'modify'
2977          * on these attributes. */
2978         attr_cnt = 0;
2979         for (l = passwordAttrs; *l != NULL; l++) {
2980                 if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
2981                         continue;
2982                 }
2983
2984                 if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
2985                         /* MS-ADTS 3.1.1.3.1.5.2 */
2986                         if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
2987                             (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
2988                                 return LDB_ERR_CONSTRAINT_VIOLATION;
2989                         }
2990
2991                         ++attr_cnt;
2992                 }
2993         }
2994         if (attr_cnt == 0) {
2995                 return ldb_next_request(module, req);
2996         }
2997
2998         ac = ph_init_context(module, req, userPassword);
2999         if (!ac) {
3000                 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
3001                 return ldb_operr(ldb);
3002         }
3003         ph_apply_controls(ac);
3004
3005         /* use a new message structure so that we can modify it */
3006         msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
3007         if (msg == NULL) {
3008                 return ldb_oom(ldb);
3009         }
3010
3011         /* - check for single-valued password attributes
3012          *   (if not return "CONSTRAINT_VIOLATION")
3013          * - check that for a password change operation one add and one delete
3014          *   operation exists
3015          *   (if not return "CONSTRAINT_VIOLATION" or "UNWILLING_TO_PERFORM")
3016          * - check that a password change and a password set operation cannot
3017          *   be mixed
3018          *   (if not return "UNWILLING_TO_PERFORM")
3019          * - remove all password attributes modifications from the first change
3020          *   operation (anything without the passwords) - we will make the real
3021          *   modification later */
3022         del_attr_cnt = 0;
3023         add_attr_cnt = 0;
3024         rep_attr_cnt = 0;
3025         for (l = passwordAttrs; *l != NULL; l++) {
3026                 if ((!ac->userPassword) &&
3027                     (ldb_attr_cmp(*l, "userPassword") == 0)) {
3028                         continue;
3029                 }
3030
3031                 while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
3032                         if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
3033                                 ++del_attr_cnt;
3034                         }
3035                         if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
3036                                 ++add_attr_cnt;
3037                         }
3038                         if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
3039                                 ++rep_attr_cnt;
3040                         }
3041                         if ((passwordAttr->num_values != 1) &&
3042                             (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
3043                                 talloc_free(ac);
3044                                 ldb_asprintf_errstring(ldb,
3045                                                        "'%s' attribute must have exactly one value on add operations!",
3046                                                        *l);
3047                                 return LDB_ERR_CONSTRAINT_VIOLATION;
3048                         }
3049                         if ((passwordAttr->num_values > 1) &&
3050                             (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
3051                                 talloc_free(ac);
3052                                 ldb_asprintf_errstring(ldb,
3053                                                        "'%s' attribute must have zero or one value(s) on delete operations!",
3054                                                        *l);
3055                                 return LDB_ERR_CONSTRAINT_VIOLATION;
3056                         }
3057                         ldb_msg_remove_element(msg, passwordAttr);
3058                 }
3059         }
3060         if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
3061                 talloc_free(ac);
3062                 ldb_set_errstring(ldb,
3063                                   "Only the add action for a password change specified!");
3064                 return LDB_ERR_UNWILLING_TO_PERFORM;
3065         }
3066         if ((del_attr_cnt > 1) || (add_attr_cnt > 1)) {
3067                 talloc_free(ac);
3068                 ldb_set_errstring(ldb,
3069                                   "Only one delete and one add action for a password change allowed!");
3070                 return LDB_ERR_UNWILLING_TO_PERFORM;
3071         }
3072         if ((rep_attr_cnt > 0) && ((del_attr_cnt > 0) || (add_attr_cnt > 0))) {
3073                 talloc_free(ac);
3074                 ldb_set_errstring(ldb,
3075                                   "Either a password change or a password set operation is allowed!");
3076                 return LDB_ERR_UNWILLING_TO_PERFORM;
3077         }
3078
3079         /* if there was nothing else to be modified skip to next step */
3080         if (msg->num_elements == 0) {
3081                 return password_hash_mod_search_self(ac);
3082         }
3083
3084         ret = ldb_build_mod_req(&down_req, ldb, ac,
3085                                 msg,
3086                                 req->controls,
3087                                 ac, ph_modify_callback,
3088                                 req);
3089         LDB_REQ_SET_LOCATION(down_req);
3090         if (ret != LDB_SUCCESS) {
3091                 return ret;
3092         }
3093
3094         return ldb_next_request(module, down_req);
3095 }
3096
3097 static int ph_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
3098 {
3099         struct ph_context *ac;
3100
3101         ac = talloc_get_type(req->context, struct ph_context);
3102
3103         if (!ares) {
3104                 return ldb_module_done(ac->req, NULL, NULL,
3105                                         LDB_ERR_OPERATIONS_ERROR);
3106         }
3107
3108         if (ares->type == LDB_REPLY_REFERRAL) {
3109                 return ldb_module_send_referral(ac->req, ares->referral);
3110         }
3111
3112         if (ares->error != LDB_SUCCESS) {
3113                 return ldb_module_done(ac->req, ares->controls,
3114                                         ares->response, ares->error);
3115         }
3116
3117         if (ares->type != LDB_REPLY_DONE) {
3118                 talloc_free(ares);
3119                 return ldb_module_done(ac->req, NULL, NULL,
3120                                         LDB_ERR_OPERATIONS_ERROR);
3121         }
3122
3123         talloc_free(ares);
3124
3125         return password_hash_mod_search_self(ac);
3126 }
3127
3128 static int ph_mod_search_callback(struct ldb_request *req, struct ldb_reply *ares)
3129 {
3130         struct ldb_context *ldb;
3131         struct ph_context *ac;
3132         int ret = LDB_SUCCESS;
3133
3134         ac = talloc_get_type(req->context, struct ph_context);
3135         ldb = ldb_module_get_ctx(ac->module);
3136
3137         if (!ares) {
3138                 ret = LDB_ERR_OPERATIONS_ERROR;
3139                 goto done;
3140         }
3141         if (ares->error != LDB_SUCCESS) {
3142                 return ldb_module_done(ac->req, ares->controls,
3143                                         ares->response, ares->error);
3144         }
3145
3146         /* we are interested only in the single reply (base search) */
3147         switch (ares->type) {
3148         case LDB_REPLY_ENTRY:
3149                 /* Make sure we are performing the password change action on a
3150                  * (for us) valid object. Those are instances of either "user"
3151                  * and/or "inetOrgPerson". Otherwise continue with the
3152                  * submodules. */
3153                 if ((!ldb_msg_check_string_attribute(ares->message, "objectClass", "user"))
3154                         && (!ldb_msg_check_string_attribute(ares->message, "objectClass", "inetOrgPerson"))) {
3155                         talloc_free(ares);
3156
3157                         if (ldb_msg_find_element(ac->req->op.mod.message, "clearTextPassword") != NULL) {
3158                                 ldb_set_errstring(ldb,
3159                                                   "'clearTextPassword' is only allowed on objects of class 'user' and/or 'inetOrgPerson'!");
3160                                 ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
3161                                 goto done;
3162                         }
3163
3164                         ret = ldb_next_request(ac->module, ac->req);
3165                         goto done;
3166                 }
3167
3168                 if (ac->search_res != NULL) {
3169                         talloc_free(ares);
3170
3171                         ldb_set_errstring(ldb, "Too many results");
3172                         ret = LDB_ERR_OPERATIONS_ERROR;
3173                         goto done;
3174                 }
3175
3176                 ac->search_res = talloc_steal(ac, ares);
3177                 ret = LDB_SUCCESS;
3178                 break;
3179
3180         case LDB_REPLY_REFERRAL:
3181                 /* ignore anything else for now */
3182                 talloc_free(ares);
3183                 ret = LDB_SUCCESS;
3184                 break;
3185
3186         case LDB_REPLY_DONE:
3187                 talloc_free(ares);
3188
3189                 /* get user domain data */
3190                 ret = build_domain_data_request(ac);
3191                 if (ret != LDB_SUCCESS) {
3192                         return ldb_module_done(ac->req, NULL, NULL, ret);
3193                 }
3194
3195                 ret = ldb_next_request(ac->module, ac->dom_req);
3196                 break;
3197         }
3198
3199 done:
3200         if (ret != LDB_SUCCESS) {
3201                 return ldb_module_done(ac->req, NULL, NULL, ret);
3202         }
3203
3204         return LDB_SUCCESS;
3205 }
3206
3207 static int password_hash_mod_search_self(struct ph_context *ac)
3208 {
3209         struct ldb_context *ldb;
3210         static const char * const attrs[] = { "objectClass",
3211                                               "userAccountControl",
3212                                               "msDS-User-Account-Control-Computed",
3213                                               "pwdLastSet",
3214                                               "sAMAccountName",
3215                                               "objectSid",
3216                                               "userPrincipalName",
3217                                               "supplementalCredentials",
3218                                               "lmPwdHistory",
3219                                               "ntPwdHistory",
3220                                               "dBCSPwd",
3221                                               "unicodePwd",
3222                                               NULL };
3223         struct ldb_request *search_req;
3224         int ret;
3225
3226         ldb = ldb_module_get_ctx(ac->module);
3227
3228         ret = ldb_build_search_req(&search_req, ldb, ac,
3229                                    ac->req->op.mod.message->dn,
3230                                    LDB_SCOPE_BASE,
3231                                    "(objectclass=*)",
3232                                    attrs,
3233                                    NULL,
3234                                    ac, ph_mod_search_callback,
3235                                    ac->req);
3236         LDB_REQ_SET_LOCATION(search_req);
3237         if (ret != LDB_SUCCESS) {
3238                 return ret;
3239         }
3240
3241         return ldb_next_request(ac->module, search_req);
3242 }
3243
3244 static int password_hash_mod_do_mod(struct ph_context *ac)
3245 {
3246         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
3247         struct loadparm_context *lp_ctx =
3248                                 talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
3249                                                 struct loadparm_context);
3250         struct ldb_request *mod_req;
3251         struct ldb_message *msg;
3252         const struct ldb_message *orig_msg, *searched_msg;
3253         struct setup_password_fields_io io;
3254         int ret;
3255         NTSTATUS status;
3256
3257         /* use a new message structure so that we can modify it */
3258         msg = ldb_msg_new(ac);
3259         if (msg == NULL) {
3260                 return ldb_operr(ldb);
3261         }
3262
3263         /* modify dn */
3264         msg->dn = ac->req->op.mod.message->dn;
3265
3266         orig_msg = ac->req->op.mod.message;
3267         searched_msg = ac->search_res->message;
3268
3269         /* Prepare the internal data structure containing the passwords */
3270         ret = setup_io(ac, orig_msg, searched_msg, &io);
3271         if (ret != LDB_SUCCESS) {
3272                 return ret;
3273         }
3274
3275         if (io.ac->pwd_reset) {
3276                 /* Get the old password from the database */
3277                 status = samdb_result_passwords_no_lockout(io.ac,
3278                                                            lp_ctx,
3279                                                            discard_const_p(struct ldb_message, searched_msg),
3280                                                            &io.o.lm_hash,
3281                                                            &io.o.nt_hash);
3282         } else {
3283                 /* Get the old password from the database */
3284                 status = samdb_result_passwords(io.ac,
3285                                                 lp_ctx,
3286                                                 discard_const_p(struct ldb_message, searched_msg),
3287                                                 &io.o.lm_hash, &io.o.nt_hash);
3288         }
3289
3290         if (!NT_STATUS_IS_OK(status)) {
3291                 return ldb_operr(ldb);
3292         }
3293
3294         io.o.nt_history_len             = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
3295         io.o.lm_history_len             = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
3296         io.o.supplemental               = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
3297
3298         ret = setup_password_fields(&io);
3299         if (ret != LDB_SUCCESS) {
3300                 return ret;
3301         }
3302
3303         ret = check_password_restrictions(&io);
3304         if (ret != LDB_SUCCESS) {
3305                 return ret;
3306         }
3307
3308         /* make sure we replace all the old attributes */
3309         ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
3310         ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
3311         ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3312         ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
3313         ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
3314         ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
3315
3316         if (io.g.nt_hash) {
3317                 ret = samdb_msg_add_hash(ldb, ac, msg,
3318                                          "unicodePwd", io.g.nt_hash);
3319                 if (ret != LDB_SUCCESS) {
3320                         return ret;
3321                 }
3322         }
3323         if (io.g.lm_hash) {
3324                 ret = samdb_msg_add_hash(ldb, ac, msg,
3325                                          "dBCSPwd", io.g.lm_hash);
3326                 if (ret != LDB_SUCCESS) {
3327                         return ret;
3328                 }
3329         }
3330         if (io.g.nt_history_len > 0) {
3331                 ret = samdb_msg_add_hashes(ldb, ac, msg,
3332                                            "ntPwdHistory",
3333                                            io.g.nt_history,
3334                                            io.g.nt_history_len);
3335                 if (ret != LDB_SUCCESS) {
3336                         return ret;
3337                 }
3338         }
3339         if (io.g.lm_history_len > 0) {
3340                 ret = samdb_msg_add_hashes(ldb, ac, msg,
3341                                            "lmPwdHistory",
3342                                            io.g.lm_history,
3343                                            io.g.lm_history_len);
3344                 if (ret != LDB_SUCCESS) {
3345                         return ret;
3346                 }
3347         }
3348         if (io.g.supplemental.length > 0) {
3349                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
3350                                         &io.g.supplemental, NULL);
3351                 if (ret != LDB_SUCCESS) {
3352                         return ret;
3353                 }
3354         }
3355         ret = samdb_msg_add_uint64(ldb, ac, msg,
3356                                    "pwdLastSet",
3357                                    io.g.last_set);
3358         if (ret != LDB_SUCCESS) {
3359                 return ret;
3360         }
3361
3362         ret = ldb_build_mod_req(&mod_req, ldb, ac,
3363                                 msg,
3364                                 ac->req->controls,
3365                                 ac, ph_op_callback,
3366                                 ac->req);
3367         LDB_REQ_SET_LOCATION(mod_req);
3368         if (ret != LDB_SUCCESS) {
3369                 return ret;
3370         }
3371
3372         return ldb_next_request(ac->module, mod_req);
3373 }
3374
3375 static const struct ldb_module_ops ldb_password_hash_module_ops = {
3376         .name          = "password_hash",
3377         .add           = password_hash_add,
3378         .modify        = password_hash_modify
3379 };
3380
3381 int ldb_password_hash_module_init(const char *version)
3382 {
3383         LDB_MODULE_CHECK_VERSION(version);
3384         return ldb_register_module(&ldb_password_hash_module_ops);
3385 }