source4/dsdb/samdb/ldb_modules/password_hash.c

   1 /*
   2    ldb database module
   3
   4    Copyright (C) Simo Sorce  2004-2006
   5    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
   6    Copyright (C) Andrew Tridgell 2004
   7    Copyright (C) Stefan Metzmacher 2007
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /*
  24  *  Name: ldb
  25  *
  26  *  Component: ldb password_hash module
  27  *
  28  *  Description: correctly update hash values based on changes to userPassword and friends
  29  *
  30  *  Author: Andrew Bartlett
  31  *  Author: Stefan Metzmacher
  32  */
  33
  34 #include "includes.h"
  35 #include "libcli/ldap/ldap_ndr.h"
  36 #include "ldb/include/ldb_errors.h"
  37 #include "ldb/include/ldb.h"
  38 #include "ldb/include/ldb_private.h"
  39 #include "librpc/gen_ndr/misc.h"
  40 #include "librpc/gen_ndr/samr.h"
  41 #include "libcli/auth/libcli_auth.h"
  42 #include "libcli/security/security.h"
  43 #include "system/kerberos.h"
  44 #include "auth/kerberos/kerberos.h"
  45 #include "system/time.h"
  46 #include "dsdb/samdb/samdb.h"
  47 #include "dsdb/common/flags.h"
  48 #include "dsdb/samdb/ldb_modules/password_modules.h"
  49 #include "librpc/ndr/libndr.h"
  50 #include "librpc/gen_ndr/ndr_drsblobs.h"
  51 #include "lib/crypto/crypto.h"
  52 #include "param/param.h"
  53
  54 /* If we have decided there is reason to work on this request, then
  55  * setup all the password hash types correctly.
  56  *
  57  * If the administrator doesn't want the userPassword stored (set in the
  58  * domain and per-account policies) then we must strip that out before
  59  * we do the first operation.
  60  *
  61  * Once this is done (which could update anything at all), we
  62  * calculate the password hashes.
  63  *
  64  * This function must not only update the unicodePwd, dBCSPwd and
  65  * supplementalCredentials fields, it must also atomicly increment the
  66  * msDS-KeyVersionNumber.  We should be in a transaction, so all this
  67  * should be quite safe...
  68  *
  69  * Finally, if the administrator has requested that a password history
  70  * be maintained, then this should also be written out.
  71  *
  72  */
  73
  74 struct ph_context {
  75
  76         enum ph_type {PH_ADD, PH_MOD} type;
  77         enum ph_step {PH_ADD_SEARCH_DOM, PH_ADD_DO_ADD, PH_MOD_DO_REQ, PH_MOD_SEARCH_SELF, PH_MOD_SEARCH_DOM, PH_MOD_DO_MOD} step;
  78
  79         struct ldb_module *module;
  80         struct ldb_request *orig_req;
  81
  82         struct ldb_request *dom_req;
  83         struct ldb_reply *dom_res;
  84
  85         struct ldb_request *down_req;
  86
  87         struct ldb_request *search_req;
  88         struct ldb_reply *search_res;
  89
  90         struct ldb_request *mod_req;
  91
  92         struct dom_sid *domain_sid;
  93 };
  94
  95 struct domain_data {
  96         bool store_cleartext;
  97         uint_t pwdProperties;
  98         uint_t pwdHistoryLength;
  99         char *netbios_domain;
 100         char *dns_domain;
 101         char *realm;
 102 };
 103
 104 struct setup_password_fields_io {
 105         struct ph_context *ac;
 106         struct domain_data *domain;
 107         struct smb_krb5_context *smb_krb5_context;
 108
 109         /* infos about the user account */
 110         struct {
 111                 uint32_t user_account_control;
 112                 const char *sAMAccountName;
 113                 const char *user_principal_name;
 114                 bool is_computer;
 115         } u;
 116
 117         /* new credentials */
 118         struct {
 119                 const char *cleartext;
 120                 struct samr_Password *nt_hash;
 121                 struct samr_Password *lm_hash;
 122         } n;
 123
 124         /* old credentials */
 125         struct {
 126                 uint32_t nt_history_len;
 127                 struct samr_Password *nt_history;
 128                 uint32_t lm_history_len;
 129                 struct samr_Password *lm_history;
 130                 const struct ldb_val *supplemental;
 131                 struct supplementalCredentialsBlob scb;
 132                 uint32_t kvno;
 133         } o;
 134
 135         /* generated credentials */
 136         struct {
 137                 struct samr_Password *nt_hash;
 138                 struct samr_Password *lm_hash;
 139                 uint32_t nt_history_len;
 140                 struct samr_Password *nt_history;
 141                 uint32_t lm_history_len;
 142                 struct samr_Password *lm_history;
 143                 struct ldb_val supplemental;
 144                 NTTIME last_set;
 145                 uint32_t kvno;
 146         } g;
 147 };
 148
 149 static int setup_nt_fields(struct setup_password_fields_io *io)
 150 {
 151         uint32_t i;
 152
 153         io->g.nt_hash = io->n.nt_hash;
 154
 155         if (io->domain->pwdHistoryLength == 0) {
 156                 return LDB_SUCCESS;
 157         }
 158
 159         /* We might not have an old NT password */
 160         io->g.nt_history = talloc_array(io->ac,
 161                                         struct samr_Password,
 162                                         io->domain->pwdHistoryLength);
 163         if (!io->g.nt_history) {
 164                 ldb_oom(io->ac->module->ldb);
 165                 return LDB_ERR_OPERATIONS_ERROR;
 166         }
 167
 168         for (i = 0; i < MIN(io->domain->pwdHistoryLength-1, io->o.nt_history_len); i++) {
 169                 io->g.nt_history[i+1] = io->o.nt_history[i];
 170         }
 171         io->g.nt_history_len = i + 1;
 172
 173         if (io->g.nt_hash) {
 174                 io->g.nt_history[0] = *io->g.nt_hash;
 175         } else {
 176                 /*
 177                  * TODO: is this correct?
 178                  * the simular behavior is correct for the lm history case
 179                  */
 180                 E_md4hash("", io->g.nt_history[0].hash);
 181         }
 182
 183         return LDB_SUCCESS;
 184 }
 185
 186 static int setup_lm_fields(struct setup_password_fields_io *io)
 187 {
 188         uint32_t i;
 189
 190         io->g.lm_hash = io->n.lm_hash;
 191
 192         if (io->domain->pwdHistoryLength == 0) {
 193                 return LDB_SUCCESS;
 194         }
 195
 196         /* We might not have an old NT password */
 197         io->g.lm_history = talloc_array(io->ac,
 198                                         struct samr_Password,
 199                                         io->domain->pwdHistoryLength);
 200         if (!io->g.lm_history) {
 201                 ldb_oom(io->ac->module->ldb);
 202                 return LDB_ERR_OPERATIONS_ERROR;
 203         }
 204
 205         for (i = 0; i < MIN(io->domain->pwdHistoryLength-1, io->o.lm_history_len); i++) {
 206                 io->g.lm_history[i+1] = io->o.lm_history[i];
 207         }
 208         io->g.lm_history_len = i + 1;
 209
 210         if (io->g.lm_hash) {
 211                 io->g.lm_history[0] = *io->g.lm_hash;
 212         } else {
 213                 E_deshash("", io->g.lm_history[0].hash);
 214         }
 215
 216         return LDB_SUCCESS;
 217 }
 218
 219 static int setup_primary_kerberos(struct setup_password_fields_io *io,
 220                                   const struct supplementalCredentialsBlob *old_scb,
 221                                   struct package_PrimaryKerberosBlob *pkb)
 222 {
 223         krb5_error_code krb5_ret;
 224         Principal *salt_principal;
 225         krb5_salt salt;
 226         krb5_keyblock key;
 227         uint32_t k=0;
 228         struct package_PrimaryKerberosCtr3 *pkb3 = &pkb->ctr.ctr3;
 229         struct supplementalCredentialsPackage *old_scp = NULL;
 230         struct package_PrimaryKerberosBlob _old_pkb;
 231         struct package_PrimaryKerberosCtr3 *old_pkb3 = NULL;
 232         uint32_t i;
 233         enum ndr_err_code ndr_err;
 234
 235         /* Many, many thanks to lukeh@padl.com for this
 236          * algorithm, described in his Nov 10 2004 mail to
 237          * samba-technical@samba.org */
 238
 239         /*
 240          * Determine a salting principal
 241          */
 242         if (io->u.is_computer) {
 243                 char *name;
 244                 char *saltbody;
 245
 246                 name = talloc_strdup(io->ac, io->u.sAMAccountName);
 247                 if (!name) {
 248                         ldb_oom(io->ac->module->ldb);
 249                         return LDB_ERR_OPERATIONS_ERROR;
 250                 }
 251
 252                 if (name[strlen(name)-1] == '$') {
 253                         name[strlen(name)-1] = '\0';
 254                 }
 255
 256                 saltbody = talloc_asprintf(io->ac, "%s.%s", name, io->domain->dns_domain);
 257                 if (!saltbody) {
 258                         ldb_oom(io->ac->module->ldb);
 259                         return LDB_ERR_OPERATIONS_ERROR;
 260                 }
 261
 262                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 263                                                &salt_principal,
 264                                                io->domain->realm, "host",
 265                                                saltbody, NULL);
 266         } else if (io->u.user_principal_name) {
 267                 char *user_principal_name;
 268                 char *p;
 269
 270                 user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
 271                 if (!user_principal_name) {
 272                         ldb_oom(io->ac->module->ldb);
 273                         return LDB_ERR_OPERATIONS_ERROR;
 274                 }
 275
 276                 p = strchr(user_principal_name, '@');
 277                 if (p) {
 278                         p[0] = '\0';
 279                 }
 280
 281                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 282                                                &salt_principal,
 283                                                io->domain->realm, user_principal_name,
 284                                                NULL);
 285         } else {
 286                 krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
 287                                                &salt_principal,
 288                                                io->domain->realm, io->u.sAMAccountName,
 289                                                NULL);
 290         }
 291         if (krb5_ret) {
 292                 ldb_asprintf_errstring(io->ac->module->ldb,
 293                                        "setup_primary_kerberos: "
 294                                        "generation of a salting principal failed: %s",
 295                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context, krb5_ret, io->ac));
 296                 return LDB_ERR_OPERATIONS_ERROR;
 297         }
 298
 299         /*
 300          * create salt from salt_principal
 301          */
 302         krb5_ret = krb5_get_pw_salt(io->smb_krb5_context->krb5_context,
 303                                     salt_principal, &salt);
 304         krb5_free_principal(io->smb_krb5_context->krb5_context, salt_principal);
 305         if (krb5_ret) {
 306                 ldb_asprintf_errstring(io->ac->module->ldb,
 307                                        "setup_primary_kerberos: "
 308                                        "generation of krb5_salt failed: %s",
 309                                        smb_get_krb5_error_message(io->smb_krb5_context->krb5_context, krb5_ret, io->ac));
 310                 return LDB_ERR_OPERATIONS_ERROR;
 311         }
 312         /* create a talloc copy */
 313         pkb3->salt.string = talloc_strndup(io->ac,
 314                                           salt.saltvalue.data,
 315                                           salt.saltvalue.length);
 316         krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
 317         if (!pkb3->salt.string) {
 318                 ldb_oom(io->ac->module->ldb);
 319                 return LDB_ERR_OPERATIONS_ERROR;
 320         }
 321         salt.saltvalue.data     = discard_const(pkb3->salt.string);
 322         salt.saltvalue.length   = strlen(pkb3->salt.string);
 323
 324         /*
 325          * prepare generation of keys
 326          *
 327          * ENCTYPE_AES256_CTS_HMAC_SHA1_96 (disabled by default)
 328          * ENCTYPE_DES_CBC_MD5
 329          * ENCTYPE_DES_CBC_CRC
 330          *
 331          * NOTE: update num_keys when you add another enctype!
 332          */
 333         pkb3->num_keys  = 3;
 334         pkb3->keys      = talloc_array(io->ac, struct package_PrimaryKerberosKey, pkb3->num_keys);
 335         if (!pkb3->keys) {
 336                 ldb_oom(io->ac->module->ldb);
 337                 return LDB_ERR_OPERATIONS_ERROR;
 338         }
 339         pkb3->unknown3  = talloc_zero_array(io->ac, uint64_t, pkb3->num_keys);
 340         if (!pkb3->unknown3) {
 341                 ldb_oom(io->ac->module->ldb);
 342                 return LDB_ERR_OPERATIONS_ERROR;
 343         }
 344
 345         if (lp_parm_bool(ldb_get_opaque(io->ac->module->ldb, "loadparm"), NULL, "password_hash", "create_aes_key", false)) {
 346         /*
 347          * TODO:
 348          *
 349          * w2k and w2k3 doesn't support AES, so we'll not include
 350          * the AES key here yet.
 351          *
 352          * Also we don't have an example supplementalCredentials blob
 353          * from Windows Longhorn Server with AES support
 354          *
 355          */
 356         /*
 357          * create ENCTYPE_AES256_CTS_HMAC_SHA1_96 key out of
 358          * the salt and the cleartext password
 359          */
 360         krb5_ret = krb5_string_to_key_salt(io->smb_krb5_context->krb5_context,
 361                                            ENCTYPE_AES256_CTS_HMAC_SHA1_96,
 362                                            io->n.cleartext,
 363                                            salt,
 364                                            &key);
 365         pkb3->keys[k].keytype   = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
 366         pkb3->keys[k].value     = talloc(pkb3->keys, DATA_BLOB);
 367         if (!pkb3->keys[k].value) {
 368                 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 369                 ldb_oom(io->ac->module->ldb);
 370                 return LDB_ERR_OPERATIONS_ERROR;
 371         }
 372         *pkb3->keys[k].value    = data_blob_talloc(pkb3->keys[k].value,
 373                                                    key.keyvalue.data,
 374                                                    key.keyvalue.length);
 375         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 376         if (!pkb3->keys[k].value->data) {
 377                 ldb_oom(io->ac->module->ldb);
 378                 return LDB_ERR_OPERATIONS_ERROR;
 379         }
 380         k++;
 381 }
 382
 383         /*
 384          * create ENCTYPE_DES_CBC_MD5 key out of
 385          * the salt and the cleartext password
 386          */
 387         krb5_ret = krb5_string_to_key_salt(io->smb_krb5_context->krb5_context,
 388                                            ENCTYPE_DES_CBC_MD5,
 389                                            io->n.cleartext,
 390                                            salt,
 391                                            &key);
 392         pkb3->keys[k].keytype   = ENCTYPE_DES_CBC_MD5;
 393         pkb3->keys[k].value     = talloc(pkb3->keys, DATA_BLOB);
 394         if (!pkb3->keys[k].value) {
 395                 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 396                 ldb_oom(io->ac->module->ldb);
 397                 return LDB_ERR_OPERATIONS_ERROR;
 398         }
 399         *pkb3->keys[k].value    = data_blob_talloc(pkb3->keys[k].value,
 400                                                    key.keyvalue.data,
 401                                                    key.keyvalue.length);
 402         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 403         if (!pkb3->keys[k].value->data) {
 404                 ldb_oom(io->ac->module->ldb);
 405                 return LDB_ERR_OPERATIONS_ERROR;
 406         }
 407         k++;
 408
 409         /*
 410          * create ENCTYPE_DES_CBC_CRC key out of
 411          * the salt and the cleartext password
 412          */
 413         krb5_ret = krb5_string_to_key_salt(io->smb_krb5_context->krb5_context,
 414                                            ENCTYPE_DES_CBC_CRC,
 415                                            io->n.cleartext,
 416                                            salt,
 417                                            &key);
 418         pkb3->keys[k].keytype   = ENCTYPE_DES_CBC_CRC;
 419         pkb3->keys[k].value     = talloc(pkb3->keys, DATA_BLOB);
 420         if (!pkb3->keys[k].value) {
 421                 krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 422                 ldb_oom(io->ac->module->ldb);
 423                 return LDB_ERR_OPERATIONS_ERROR;
 424         }
 425         *pkb3->keys[k].value    = data_blob_talloc(pkb3->keys[k].value,
 426                                                    key.keyvalue.data,
 427                                                    key.keyvalue.length);
 428         krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
 429         if (!pkb3->keys[k].value->data) {
 430                 ldb_oom(io->ac->module->ldb);
 431                 return LDB_ERR_OPERATIONS_ERROR;
 432         }
 433         k++;
 434
 435         /* fix up key number */
 436         pkb3->num_keys = k;
 437
 438         /* initialize the old keys to zero */
 439         pkb3->num_old_keys      = 0;
 440         pkb3->old_keys          = NULL;
 441         pkb3->unknown3_old      = NULL;
 442
 443         /* if there're no old keys, then we're done */
 444         if (!old_scb) {
 445                 return LDB_SUCCESS;
 446         }
 447
 448         for (i=0; i < old_scb->sub.num_packages; i++) {
 449                 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
 450                         continue;
 451                 }
 452
 453                 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
 454                         continue;
 455                 }
 456
 457                 old_scp = &old_scb->sub.packages[i];
 458                 break;
 459         }
 460         /* Primary:Kerberos element of supplementalCredentials */
 461         if (old_scp) {
 462                 DATA_BLOB blob;
 463
 464                 blob = strhex_to_data_blob(old_scp->data);
 465                 if (!blob.data) {
 466                         ldb_oom(io->ac->module->ldb);
 467                         return LDB_ERR_OPERATIONS_ERROR;
 468                 }
 469                 talloc_steal(io->ac, blob.data);
 470
 471                 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
 472                 ndr_err = ndr_pull_struct_blob(&blob, io->ac, lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")), &_old_pkb,
 473                                                (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 474                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 475                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 476                         ldb_asprintf_errstring(io->ac->module->ldb,
 477                                                "setup_primary_kerberos: "
 478                                                "failed to pull old package_PrimaryKerberosBlob: %s",
 479                                                nt_errstr(status));
 480                         return LDB_ERR_OPERATIONS_ERROR;
 481                 }
 482
 483                 if (_old_pkb.version != 3) {
 484                         ldb_asprintf_errstring(io->ac->module->ldb,
 485                                                "setup_primary_kerberos: "
 486                                                "package_PrimaryKerberosBlob version[%u] expected[3]",
 487                                                _old_pkb.version);
 488                         return LDB_ERR_OPERATIONS_ERROR;
 489                 }
 490
 491                 old_pkb3 = &_old_pkb.ctr.ctr3;
 492         }
 493
 494         /* if we didn't found the old keys we're done */
 495         if (!old_pkb3) {
 496                 return LDB_SUCCESS;
 497         }
 498
 499         /* fill in the old keys */
 500         pkb3->num_old_keys      = old_pkb3->num_keys;
 501         pkb3->old_keys          = old_pkb3->keys;
 502         pkb3->unknown3_old      = old_pkb3->unknown3;
 503
 504         return LDB_SUCCESS;
 505 }
 506
 507 static int setup_primary_wdigest(struct setup_password_fields_io *io,
 508                                  const struct supplementalCredentialsBlob *old_scb,
 509                                  struct package_PrimaryWDigestBlob *pdb)
 510 {
 511         DATA_BLOB sAMAccountName;
 512         DATA_BLOB sAMAccountName_l;
 513         DATA_BLOB sAMAccountName_u;
 514         const char *user_principal_name = io->u.user_principal_name;
 515         DATA_BLOB userPrincipalName;
 516         DATA_BLOB userPrincipalName_l;
 517         DATA_BLOB userPrincipalName_u;
 518         DATA_BLOB netbios_domain;
 519         DATA_BLOB netbios_domain_l;
 520         DATA_BLOB netbios_domain_u;
 521         DATA_BLOB dns_domain;
 522         DATA_BLOB dns_domain_l;
 523         DATA_BLOB dns_domain_u;
 524         DATA_BLOB cleartext;
 525         DATA_BLOB digest;
 526         DATA_BLOB delim;
 527         DATA_BLOB backslash;
 528         uint8_t i;
 529         struct {
 530                 DATA_BLOB *user;
 531                 DATA_BLOB *realm;
 532                 DATA_BLOB *nt4dom;
 533         } wdigest[] = {
 534         /*
 535          * See
 536          * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
 537          * for what precalculated hashes are supposed to be stored...
 538          *
 539          * I can't reproduce all values which should contain "Digest" as realm,
 540          * am I doing something wrong or is w2k3 just broken...?
 541          *
 542          * W2K3 fills in following for a user:
 543          *
 544          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
 545          * sAMAccountName: NewUser2Sam
 546          * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
 547          *
 548          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 549          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
 550          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
 551          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 552          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
 553          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
 554          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
 555          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 556          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 557          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 558          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 559          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 560          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 561          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 562          * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 563          * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 564          * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
 565          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
 566          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
 567          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
 568          * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
 569          * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
 570          * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
 571          * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
 572          * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
 573          * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
 574          * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
 575          * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
 576          * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
 577          *
 578          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
 579          * sAMAccountName: NewUser2Sam
 580          *
 581          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 582          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
 583          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
 584          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 585          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
 586          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
 587          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
 588          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 589          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 590          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 591          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 592          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 593          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 594          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 595          * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 596          * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 597          * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
 598          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
 599          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
 600          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
 601          * 31dc704d3640335b2123d4ee28aa1f11 => ???M1   changes with NewUser2Sam => NewUser1Sam
 602          * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
 603          * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
 604          * 569b4533f2d9e580211dd040e5e360a8 => ???M2   changes with NewUser2Princ => NewUser1Princ
 605          * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
 606          * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
 607          * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
 608          * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
 609          * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
 610          */
 611
 612         /*
 613          * sAMAccountName, netbios_domain
 614          */
 615                 {
 616                 .user   = &sAMAccountName,
 617                 .realm  = &netbios_domain,
 618                 },
 619                 {
 620                 .user   = &sAMAccountName_l,
 621                 .realm  = &netbios_domain_l,
 622                 },
 623                 {
 624                 .user   = &sAMAccountName_u,
 625                 .realm  = &netbios_domain_u,
 626                 },
 627                 {
 628                 .user   = &sAMAccountName,
 629                 .realm  = &netbios_domain_u,
 630                 },
 631                 {
 632                 .user   = &sAMAccountName,
 633                 .realm  = &netbios_domain_l,
 634                 },
 635                 {
 636                 .user   = &sAMAccountName_u,
 637                 .realm  = &netbios_domain_l,
 638                 },
 639                 {
 640                 .user   = &sAMAccountName_l,
 641                 .realm  = &netbios_domain_u,
 642                 },
 643         /*
 644          * sAMAccountName, dns_domain
 645          */
 646                 {
 647                 .user   = &sAMAccountName,
 648                 .realm  = &dns_domain,
 649                 },
 650                 {
 651                 .user   = &sAMAccountName_l,
 652                 .realm  = &dns_domain_l,
 653                 },
 654                 {
 655                 .user   = &sAMAccountName_u,
 656                 .realm  = &dns_domain_u,
 657                 },
 658                 {
 659                 .user   = &sAMAccountName,
 660                 .realm  = &dns_domain_u,
 661                 },
 662                 {
 663                 .user   = &sAMAccountName,
 664                 .realm  = &dns_domain_l,
 665                 },
 666                 {
 667                 .user   = &sAMAccountName_u,
 668                 .realm  = &dns_domain_l,
 669                 },
 670                 {
 671                 .user   = &sAMAccountName_l,
 672                 .realm  = &dns_domain_u,
 673                 },
 674         /*
 675          * userPrincipalName, no realm
 676          */
 677                 {
 678                 .user   = &userPrincipalName,
 679                 },
 680                 {
 681                 /*
 682                  * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
 683                  *       the fallback to the sAMAccountName based userPrincipalName is correct
 684                  */
 685                 .user   = &userPrincipalName_l,
 686                 },
 687                 {
 688                 .user   = &userPrincipalName_u,
 689                 },
 690         /*
 691          * nt4dom\sAMAccountName, no realm
 692          */
 693                 {
 694                 .user   = &sAMAccountName,
 695                 .nt4dom = &netbios_domain
 696                 },
 697                 {
 698                 .user   = &sAMAccountName_l,
 699                 .nt4dom = &netbios_domain_l
 700                 },
 701                 {
 702                 .user   = &sAMAccountName_u,
 703                 .nt4dom = &netbios_domain_u
 704                 },
 705
 706         /*
 707          * the following ones are guessed depending on the technet2 article
 708          * but not reproducable on a w2k3 server
 709          */
 710         /* sAMAccountName with "Digest" realm */
 711                 {
 712                 .user   = &sAMAccountName,
 713                 .realm  = &digest
 714                 },
 715                 {
 716                 .user   = &sAMAccountName_l,
 717                 .realm  = &digest
 718                 },
 719                 {
 720                 .user   = &sAMAccountName_u,
 721                 .realm  = &digest
 722                 },
 723         /* userPrincipalName with "Digest" realm */
 724                 {
 725                 .user   = &userPrincipalName,
 726                 .realm  = &digest
 727                 },
 728                 {
 729                 .user   = &userPrincipalName_l,
 730                 .realm  = &digest
 731                 },
 732                 {
 733                 .user   = &userPrincipalName_u,
 734                 .realm  = &digest
 735                 },
 736         /* nt4dom\\sAMAccountName with "Digest" realm */
 737                 {
 738                 .user   = &sAMAccountName,
 739                 .nt4dom = &netbios_domain,
 740                 .realm  = &digest
 741                 },
 742                 {
 743                 .user   = &sAMAccountName_l,
 744                 .nt4dom = &netbios_domain_l,
 745                 .realm  = &digest
 746                 },
 747                 {
 748                 .user   = &sAMAccountName_u,
 749                 .nt4dom = &netbios_domain_u,
 750                 .realm  = &digest
 751                 },
 752         };
 753
 754         /* prepare DATA_BLOB's used in the combinations array */
 755         sAMAccountName          = data_blob_string_const(io->u.sAMAccountName);
 756         sAMAccountName_l        = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
 757         if (!sAMAccountName_l.data) {
 758                 ldb_oom(io->ac->module->ldb);
 759                 return LDB_ERR_OPERATIONS_ERROR;
 760         }
 761         sAMAccountName_u        = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
 762         if (!sAMAccountName_u.data) {
 763                 ldb_oom(io->ac->module->ldb);
 764                 return LDB_ERR_OPERATIONS_ERROR;
 765         }
 766
 767         /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
 768         if (!user_principal_name) {
 769                 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
 770                                                       io->u.sAMAccountName,
 771                                                       io->domain->dns_domain);
 772                 if (!user_principal_name) {
 773                         ldb_oom(io->ac->module->ldb);
 774                         return LDB_ERR_OPERATIONS_ERROR;
 775                 }
 776         }
 777         userPrincipalName       = data_blob_string_const(user_principal_name);
 778         userPrincipalName_l     = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
 779         if (!userPrincipalName_l.data) {
 780                 ldb_oom(io->ac->module->ldb);
 781                 return LDB_ERR_OPERATIONS_ERROR;
 782         }
 783         userPrincipalName_u     = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
 784         if (!userPrincipalName_u.data) {
 785                 ldb_oom(io->ac->module->ldb);
 786                 return LDB_ERR_OPERATIONS_ERROR;
 787         }
 788
 789         netbios_domain          = data_blob_string_const(io->domain->netbios_domain);
 790         netbios_domain_l        = data_blob_string_const(strlower_talloc(io->ac, io->domain->netbios_domain));
 791         if (!netbios_domain_l.data) {
 792                 ldb_oom(io->ac->module->ldb);
 793                 return LDB_ERR_OPERATIONS_ERROR;
 794         }
 795         netbios_domain_u        = data_blob_string_const(strupper_talloc(io->ac, io->domain->netbios_domain));
 796         if (!netbios_domain_u.data) {
 797                 ldb_oom(io->ac->module->ldb);
 798                 return LDB_ERR_OPERATIONS_ERROR;
 799         }
 800
 801         dns_domain              = data_blob_string_const(io->domain->dns_domain);
 802         dns_domain_l            = data_blob_string_const(io->domain->dns_domain);
 803         dns_domain_u            = data_blob_string_const(io->domain->realm);
 804
 805         cleartext               = data_blob_string_const(io->n.cleartext);
 806
 807         digest                  = data_blob_string_const("Digest");
 808
 809         delim                   = data_blob_string_const(":");
 810         backslash               = data_blob_string_const("\\");
 811
 812         pdb->num_hashes = ARRAY_SIZE(wdigest);
 813         pdb->hashes     = talloc_array(io->ac, struct package_PrimaryWDigestHash, pdb->num_hashes);
 814         if (!pdb->hashes) {
 815                 ldb_oom(io->ac->module->ldb);
 816                 return LDB_ERR_OPERATIONS_ERROR;
 817         }
 818
 819         for (i=0; i < ARRAY_SIZE(wdigest); i++) {
 820                 struct MD5Context md5;
 821                 MD5Init(&md5);
 822                 if (wdigest[i].nt4dom) {
 823                         MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
 824                         MD5Update(&md5, backslash.data, backslash.length);
 825                 }
 826                 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
 827                 MD5Update(&md5, delim.data, delim.length);
 828                 if (wdigest[i].realm) {
 829                         MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
 830                 }
 831                 MD5Update(&md5, delim.data, delim.length);
 832                 MD5Update(&md5, cleartext.data, cleartext.length);
 833                 MD5Final(pdb->hashes[i].hash, &md5);
 834         }
 835
 836         return LDB_SUCCESS;
 837 }
 838
 839 static int setup_supplemental_field(struct setup_password_fields_io *io)
 840 {
 841         struct supplementalCredentialsBlob scb;
 842         struct supplementalCredentialsBlob _old_scb;
 843         struct supplementalCredentialsBlob *old_scb = NULL;
 844         /* Packages + (Kerberos, WDigest and maybe CLEARTEXT) */
 845         uint32_t num_packages = 1 + 2;
 846         struct supplementalCredentialsPackage packages[1+3];
 847         struct supplementalCredentialsPackage *pp = &packages[0];
 848         struct supplementalCredentialsPackage *pk = &packages[1];
 849         struct supplementalCredentialsPackage *pd = &packages[2];
 850         struct supplementalCredentialsPackage *pc = NULL;
 851         struct package_PackagesBlob pb;
 852         DATA_BLOB pb_blob;
 853         char *pb_hexstr;
 854         struct package_PrimaryKerberosBlob pkb;
 855         DATA_BLOB pkb_blob;
 856         char *pkb_hexstr;
 857         struct package_PrimaryWDigestBlob pdb;
 858         DATA_BLOB pdb_blob;
 859         char *pdb_hexstr;
 860         struct package_PrimaryCLEARTEXTBlob pcb;
 861         DATA_BLOB pcb_blob;
 862         char *pcb_hexstr;
 863         int ret;
 864         enum ndr_err_code ndr_err;
 865         uint8_t zero16[16];
 866
 867         ZERO_STRUCT(zero16);
 868
 869         if (!io->n.cleartext) {
 870                 /*
 871                  * when we don't have a cleartext password
 872                  * we can't setup a supplementalCredential value
 873                  */
 874                 return LDB_SUCCESS;
 875         }
 876
 877         /* if there's an old supplementaCredentials blob then parse it */
 878         if (io->o.supplemental) {
 879                 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
 880                                                    lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 881                                                    &_old_scb,
 882                                                    (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
 883                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 884                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 885                         ldb_asprintf_errstring(io->ac->module->ldb,
 886                                                "setup_supplemental_field: "
 887                                                "failed to pull old supplementalCredentialsBlob: %s",
 888                                                nt_errstr(status));
 889                         return LDB_ERR_OPERATIONS_ERROR;
 890                 }
 891
 892                 if (_old_scb.sub.signature == SUPPLEMENTAL_CREDENTIALS_SIGNATURE) {
 893                         old_scb = &_old_scb;
 894                 } else {
 895                         ldb_debug(io->ac->module->ldb, LDB_DEBUG_ERROR,
 896                                                "setup_supplemental_field: "
 897                                                "supplementalCredentialsBlob signature[0x%04X] expected[0x%04X]",
 898                                                _old_scb.sub.signature, SUPPLEMENTAL_CREDENTIALS_SIGNATURE);
 899                 }
 900         }
 901
 902         if (io->domain->store_cleartext &&
 903             (io->u.user_account_control & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
 904                 pc = &packages[3];
 905                 num_packages++;
 906         }
 907
 908         /* Kerberos, WDigest, CLEARTEXT and termination(counted by the Packages element) */
 909         pb.names = talloc_zero_array(io->ac, const char *, num_packages);
 910
 911         /*
 912          * setup 'Primary:Kerberos' element
 913          */
 914         pb.names[0] = "Kerberos";
 915
 916         ret = setup_primary_kerberos(io, old_scb, &pkb);
 917         if (ret != LDB_SUCCESS) {
 918                 return ret;
 919         }
 920
 921         ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
 922                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 923                                        &pkb,
 924                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
 925         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 926                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 927                 ldb_asprintf_errstring(io->ac->module->ldb,
 928                                        "setup_supplemental_field: "
 929                                        "failed to push package_PrimaryKerberosBlob: %s",
 930                                        nt_errstr(status));
 931                 return LDB_ERR_OPERATIONS_ERROR;
 932         }
 933         pkb_hexstr = data_blob_hex_string(io->ac, &pkb_blob);
 934         if (!pkb_hexstr) {
 935                 ldb_oom(io->ac->module->ldb);
 936                 return LDB_ERR_OPERATIONS_ERROR;
 937         }
 938         pk->name        = "Primary:Kerberos";
 939         pk->reserved    = 1;
 940         pk->data        = pkb_hexstr;
 941
 942         /*
 943          * setup 'Primary:WDigest' element
 944          */
 945         pb.names[1] = "WDigest";
 946
 947         ret = setup_primary_wdigest(io, old_scb, &pdb);
 948         if (ret != LDB_SUCCESS) {
 949                 return ret;
 950         }
 951
 952         ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
 953                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 954                                        &pdb,
 955                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
 956         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 957                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 958                 ldb_asprintf_errstring(io->ac->module->ldb,
 959                                        "setup_supplemental_field: "
 960                                        "failed to push package_PrimaryWDigestBlob: %s",
 961                                        nt_errstr(status));
 962                 return LDB_ERR_OPERATIONS_ERROR;
 963         }
 964         pdb_hexstr = data_blob_hex_string(io->ac, &pdb_blob);
 965         if (!pdb_hexstr) {
 966                 ldb_oom(io->ac->module->ldb);
 967                 return LDB_ERR_OPERATIONS_ERROR;
 968         }
 969         pd->name        = "Primary:WDigest";
 970         pd->reserved    = 1;
 971         pd->data        = pdb_hexstr;
 972
 973         /*
 974          * setup 'Primary:CLEARTEXT' element
 975          */
 976         if (pc) {
 977                 pb.names[2]     = "CLEARTEXT";
 978
 979                 pcb.cleartext   = io->n.cleartext;
 980
 981                 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
 982                                                lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 983                                                &pcb,
 984                                                (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
 985                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 986                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 987                         ldb_asprintf_errstring(io->ac->module->ldb,
 988                                                "setup_supplemental_field: "
 989                                                "failed to push package_PrimaryCLEARTEXTBlob: %s",
 990                                                nt_errstr(status));
 991                         return LDB_ERR_OPERATIONS_ERROR;
 992                 }
 993                 pcb_hexstr = data_blob_hex_string(io->ac, &pcb_blob);
 994                 if (!pcb_hexstr) {
 995                         ldb_oom(io->ac->module->ldb);
 996                         return LDB_ERR_OPERATIONS_ERROR;
 997                 }
 998                 pc->name        = "Primary:CLEARTEXT";
 999                 pc->reserved    = 1;
1000                 pc->data        = pcb_hexstr;
1001         }
1002
1003         /*
1004          * setup 'Packages' element
1005          */
1006         ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1007                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
1008                                        &pb,
1009                                        (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1010         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1011                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1012                 ldb_asprintf_errstring(io->ac->module->ldb,
1013                                        "setup_supplemental_field: "
1014                                        "failed to push package_PackagesBlob: %s",
1015                                        nt_errstr(status));
1016                 return LDB_ERR_OPERATIONS_ERROR;
1017         }
1018         pb_hexstr = data_blob_hex_string(io->ac, &pb_blob);
1019         if (!pb_hexstr) {
1020                 ldb_oom(io->ac->module->ldb);
1021                 return LDB_ERR_OPERATIONS_ERROR;
1022         }
1023         pp->name        = "Packages";
1024         pp->reserved    = 2;
1025         pp->data        = pb_hexstr;
1026
1027         /*
1028          * setup 'supplementalCredentials' value
1029          */
1030         scb.sub.num_packages    = num_packages;
1031         scb.sub.packages        = packages;
1032
1033         ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1034                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
1035                                        &scb,
1036                                        (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1037         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1038                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1039                 ldb_asprintf_errstring(io->ac->module->ldb,
1040                                        "setup_supplemental_field: "
1041                                        "failed to push supplementalCredentialsBlob: %s",
1042                                        nt_errstr(status));
1043                 return LDB_ERR_OPERATIONS_ERROR;
1044         }
1045
1046         return LDB_SUCCESS;
1047 }
1048
1049 static int setup_last_set_field(struct setup_password_fields_io *io)
1050 {
1051         /* set it as now */
1052         unix_to_nt_time(&io->g.last_set, time(NULL));
1053
1054         return LDB_SUCCESS;
1055 }
1056
1057 static int setup_kvno_field(struct setup_password_fields_io *io)
1058 {
1059         /* increment by one */
1060         io->g.kvno = io->o.kvno + 1;
1061
1062         return LDB_SUCCESS;
1063 }
1064
1065 static int setup_password_fields(struct setup_password_fields_io *io)
1066 {
1067         bool ok;
1068         int ret;
1069
1070         /*
1071          * refuse the change if someone want to change the cleartext
1072          * and supply his own hashes at the same time...
1073          */
1074         if (io->n.cleartext && (io->n.nt_hash || io->n.lm_hash)) {
1075                 ldb_asprintf_errstring(io->ac->module->ldb,
1076                                        "setup_password_fields: "
1077                                        "it's only allowed to set the cleartext password or the password hashes");
1078                 return LDB_ERR_UNWILLING_TO_PERFORM;
1079         }
1080
1081         if (io->n.cleartext && !io->n.nt_hash) {
1082                 struct samr_Password *hash;
1083
1084                 hash = talloc(io->ac, struct samr_Password);
1085                 if (!hash) {
1086                         ldb_oom(io->ac->module->ldb);
1087                         return LDB_ERR_OPERATIONS_ERROR;
1088                 }
1089
1090                 /* compute the new nt hash */
1091                 ok = E_md4hash(io->n.cleartext, hash->hash);
1092                 if (ok) {
1093                         io->n.nt_hash = hash;
1094                 } else {
1095                         ldb_asprintf_errstring(io->ac->module->ldb,
1096                                                "setup_password_fields: "
1097                                                "failed to generate nthash from cleartext password");
1098                         return LDB_ERR_OPERATIONS_ERROR;
1099                 }
1100         }
1101
1102         if (io->n.cleartext && !io->n.lm_hash) {
1103                 struct samr_Password *hash;
1104
1105                 hash = talloc(io->ac, struct samr_Password);
1106                 if (!hash) {
1107                         ldb_oom(io->ac->module->ldb);
1108                         return LDB_ERR_OPERATIONS_ERROR;
1109                 }
1110
1111                 /* compute the new lm hash */
1112                 ok = E_deshash(io->n.cleartext, hash->hash);
1113                 if (ok) {
1114                         io->n.lm_hash = hash;
1115                 } else {
1116                         talloc_free(hash->hash);
1117                 }
1118         }
1119
1120         ret = setup_nt_fields(io);
1121         if (ret != 0) {
1122                 return ret;
1123         }
1124
1125         ret = setup_lm_fields(io);
1126         if (ret != 0) {
1127                 return ret;
1128         }
1129
1130         ret = setup_supplemental_field(io);
1131         if (ret != 0) {
1132                 return ret;
1133         }
1134
1135         ret = setup_last_set_field(io);
1136         if (ret != 0) {
1137                 return ret;
1138         }
1139
1140         ret = setup_kvno_field(io);
1141         if (ret != 0) {
1142                 return ret;
1143         }
1144
1145         return LDB_SUCCESS;
1146 }
1147
1148 static struct ldb_handle *ph_init_handle(struct ldb_request *req, struct ldb_module *module, enum ph_type type)
1149 {
1150         struct ph_context *ac;
1151         struct ldb_handle *h;
1152
1153         h = talloc_zero(req, struct ldb_handle);
1154         if (h == NULL) {
1155                 ldb_set_errstring(module->ldb, "Out of Memory");
1156                 return NULL;
1157         }
1158
1159         h->module = module;
1160
1161         ac = talloc_zero(h, struct ph_context);
1162         if (ac == NULL) {
1163                 ldb_set_errstring(module->ldb, "Out of Memory");
1164                 talloc_free(h);
1165                 return NULL;
1166         }
1167
1168         h->private_data = (void *)ac;
1169
1170         h->state = LDB_ASYNC_INIT;
1171         h->status = LDB_SUCCESS;
1172
1173         ac->type = type;
1174         ac->module = module;
1175         ac->orig_req = req;
1176
1177         return h;
1178 }
1179
1180 static int get_domain_data_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
1181 {
1182         struct ph_context *ac;
1183
1184         ac = talloc_get_type(context, struct ph_context);
1185
1186         /* we are interested only in the single reply (base search) we receive here */
1187         if (ares->type == LDB_REPLY_ENTRY) {
1188                 if (ac->dom_res != NULL) {
1189                         ldb_set_errstring(ldb, "Too many results");
1190                         talloc_free(ares);
1191                         return LDB_ERR_OPERATIONS_ERROR;
1192                 }
1193                 ac->dom_res = talloc_steal(ac, ares);
1194         } else {
1195                 talloc_free(ares);
1196         }
1197
1198         return LDB_SUCCESS;
1199 }
1200
1201 static int build_domain_data_request(struct ph_context *ac)
1202 {
1203         /* attrs[] is returned from this function in
1204            ac->dom_req->op.search.attrs, so it must be static, as
1205            otherwise the compiler can put it on the stack */
1206         static const char * const attrs[] = { "pwdProperties", "pwdHistoryLength", NULL };
1207         char *filter;
1208
1209         ac->dom_req = talloc_zero(ac, struct ldb_request);
1210         if (ac->dom_req == NULL) {
1211                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1212                 return LDB_ERR_OPERATIONS_ERROR;
1213         }
1214         ac->dom_req->operation = LDB_SEARCH;
1215         ac->dom_req->op.search.base = ldb_get_default_basedn(ac->module->ldb);
1216         ac->dom_req->op.search.scope = LDB_SCOPE_SUBTREE;
1217
1218         filter = talloc_asprintf(ac->dom_req,
1219                                  "(&(objectSid=%s)(|(|(objectClass=domain)(objectClass=builtinDomain))(objectClass=samba4LocalDomain)))",
1220                                  ldap_encode_ndr_dom_sid(ac->dom_req, ac->domain_sid));
1221         if (filter == NULL) {
1222                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1223                 talloc_free(ac->dom_req);
1224                 return LDB_ERR_OPERATIONS_ERROR;
1225         }
1226
1227         ac->dom_req->op.search.tree = ldb_parse_tree(ac->dom_req, filter);
1228         if (ac->dom_req->op.search.tree == NULL) {
1229                 ldb_set_errstring(ac->module->ldb, "Invalid search filter");
1230                 talloc_free(ac->dom_req);
1231                 return LDB_ERR_OPERATIONS_ERROR;
1232         }
1233         ac->dom_req->op.search.attrs = attrs;
1234         ac->dom_req->controls = NULL;
1235         ac->dom_req->context = ac;
1236         ac->dom_req->callback = get_domain_data_callback;
1237         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->dom_req);
1238
1239         return LDB_SUCCESS;
1240 }
1241
1242 static struct domain_data *get_domain_data(struct ldb_module *module, void *ctx, struct ldb_reply *res)
1243 {
1244         struct domain_data *data;
1245         const char *tmp;
1246         struct ph_context *ac;
1247         char *p;
1248
1249         ac = talloc_get_type(ctx, struct ph_context);
1250
1251         data = talloc_zero(ac, struct domain_data);
1252         if (data == NULL) {
1253                 return NULL;
1254         }
1255
1256         if (res == NULL) {
1257                 ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Could not find this user's domain: %s!\n", dom_sid_string(data, ac->domain_sid));
1258                 talloc_free(data);
1259                 return NULL;
1260         }
1261
1262         data->pwdProperties= samdb_result_uint(res->message, "pwdProperties", 0);
1263         data->store_cleartext = data->pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
1264         data->pwdHistoryLength = samdb_result_uint(res->message, "pwdHistoryLength", 0);
1265
1266         /* For a domain DN, this puts things in dotted notation */
1267         /* For builtin domains, this will give details for the host,
1268          * but that doesn't really matter, as it's just used for salt
1269          * and kerberos principals, which don't exist here */
1270
1271         tmp = ldb_dn_canonical_string(ctx, res->message->dn);
1272         if (!tmp) {
1273                 return NULL;
1274         }
1275
1276         /* But it puts a trailing (or just before 'builtin') / on things, so kill that */
1277         p = strchr(tmp, '/');
1278         if (p) {
1279                 p[0] = '\0';
1280         }
1281
1282         if (tmp != NULL) {
1283                 data->dns_domain = strlower_talloc(data, tmp);
1284                 if (data->dns_domain == NULL) {
1285                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1286                         return NULL;
1287                 }
1288                 data->realm = strupper_talloc(data, tmp);
1289                 if (data->realm == NULL) {
1290                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1291                         return NULL;
1292                 }
1293                 p = strchr(tmp, '.');
1294                 if (p) {
1295                         p[0] = '\0';
1296                 }
1297                 data->netbios_domain = strupper_talloc(data, tmp);
1298                 if (data->netbios_domain == NULL) {
1299                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1300                         return NULL;
1301                 }
1302         }
1303
1304         return data;
1305 }
1306
1307 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
1308 {
1309         struct ldb_handle *h;
1310         struct ph_context *ac;
1311         struct ldb_message_element *sambaAttr;
1312         struct ldb_message_element *ntAttr;
1313         struct ldb_message_element *lmAttr;
1314         int ret;
1315
1316         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
1317
1318         if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
1319                 return ldb_next_request(module, req);
1320         }
1321
1322         /* If the caller is manipulating the local passwords directly, let them pass */
1323         if (ldb_dn_compare_base(ldb_dn_new(req, module->ldb, LOCAL_BASE),
1324                                 req->op.add.message->dn) == 0) {
1325                 return ldb_next_request(module, req);
1326         }
1327
1328         /* nobody must touch this fields */
1329         if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
1330                 return LDB_ERR_UNWILLING_TO_PERFORM;
1331         }
1332         if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
1333                 return LDB_ERR_UNWILLING_TO_PERFORM;
1334         }
1335         if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
1336                 return LDB_ERR_UNWILLING_TO_PERFORM;
1337         }
1338
1339         /* If no part of this ADD touches the userPassword, or the NT
1340          * or LM hashes, then we don't need to make any changes.  */
1341
1342         sambaAttr = ldb_msg_find_element(req->op.mod.message, "userPassword");
1343         ntAttr = ldb_msg_find_element(req->op.mod.message, "unicodePwd");
1344         lmAttr = ldb_msg_find_element(req->op.mod.message, "dBCSPwd");
1345
1346         if ((!sambaAttr) && (!ntAttr) && (!lmAttr)) {
1347                 return ldb_next_request(module, req);
1348         }
1349
1350         /* if it is not an entry of type person its an error */
1351         /* TODO: remove this when userPassword will be in schema */
1352         if (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "person")) {
1353                 ldb_set_errstring(module->ldb, "Cannot set a password on entry that does not have objectClass 'person'");
1354                 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1355         }
1356
1357         /* check userPassword is single valued here */
1358         /* TODO: remove this when userPassword will be single valued in schema */
1359         if (sambaAttr && sambaAttr->num_values > 1) {
1360                 ldb_set_errstring(module->ldb, "mupltiple values for userPassword not allowed!\n");
1361                 return LDB_ERR_CONSTRAINT_VIOLATION;
1362         }
1363
1364         if (ntAttr && (ntAttr->num_values > 1)) {
1365                 ldb_set_errstring(module->ldb, "mupltiple values for unicodePwd not allowed!\n");
1366                 return LDB_ERR_CONSTRAINT_VIOLATION;
1367         }
1368         if (lmAttr && (lmAttr->num_values > 1)) {
1369                 ldb_set_errstring(module->ldb, "mupltiple values for dBCSPwd not allowed!\n");
1370                 return LDB_ERR_CONSTRAINT_VIOLATION;
1371         }
1372
1373         if (sambaAttr && sambaAttr->num_values == 0) {
1374                 ldb_set_errstring(module->ldb, "userPassword must have a value!\n");
1375                 return LDB_ERR_CONSTRAINT_VIOLATION;
1376         }
1377
1378         if (ntAttr && (ntAttr->num_values == 0)) {
1379                 ldb_set_errstring(module->ldb, "unicodePwd must have a value!\n");
1380                 return LDB_ERR_CONSTRAINT_VIOLATION;
1381         }
1382         if (lmAttr && (lmAttr->num_values == 0)) {
1383                 ldb_set_errstring(module->ldb, "dBCSPwd must have a value!\n");
1384                 return LDB_ERR_CONSTRAINT_VIOLATION;
1385         }
1386
1387         h = ph_init_handle(req, module, PH_ADD);
1388         if (!h) {
1389                 return LDB_ERR_OPERATIONS_ERROR;
1390         }
1391         ac = talloc_get_type(h->private_data, struct ph_context);
1392
1393         /* get user domain data */
1394         ac->domain_sid = samdb_result_sid_prefix(ac, req->op.add.message, "objectSid");
1395         if (ac->domain_sid == NULL) {
1396                 ldb_debug(module->ldb, LDB_DEBUG_ERROR, "can't handle entry with missing objectSid!\n");
1397                 return LDB_ERR_OPERATIONS_ERROR;
1398         }
1399
1400         ret = build_domain_data_request(ac);
1401         if (ret != LDB_SUCCESS) {
1402                 return ret;
1403         }
1404
1405         ac->step = PH_ADD_SEARCH_DOM;
1406
1407         req->handle = h;
1408
1409         return ldb_next_request(module, ac->dom_req);
1410 }
1411
1412 static int password_hash_add_do_add(struct ldb_handle *h) {
1413
1414         struct ph_context *ac;
1415         struct domain_data *domain;
1416         struct smb_krb5_context *smb_krb5_context;
1417         struct ldb_message *msg;
1418         struct setup_password_fields_io io;
1419         int ret;
1420
1421         ac = talloc_get_type(h->private_data, struct ph_context);
1422
1423         domain = get_domain_data(ac->module, ac, ac->dom_res);
1424         if (domain == NULL) {
1425                 return LDB_ERR_OPERATIONS_ERROR;
1426         }
1427
1428         ac->down_req = talloc(ac, struct ldb_request);
1429         if (ac->down_req == NULL) {
1430                 return LDB_ERR_OPERATIONS_ERROR;
1431         }
1432
1433         *(ac->down_req) = *(ac->orig_req);
1434         ac->down_req->op.add.message = msg = ldb_msg_copy_shallow(ac->down_req, ac->orig_req->op.add.message);
1435         if (ac->down_req->op.add.message == NULL) {
1436                 return LDB_ERR_OPERATIONS_ERROR;
1437         }
1438
1439         /* Some operations below require kerberos contexts */
1440         if (smb_krb5_init_context(ac->down_req,
1441                                   ldb_get_opaque(h->module->ldb, "EventContext"),
1442                                   (struct loadparm_context *)ldb_get_opaque(h->module->ldb, "loadparm"),
1443                                   &smb_krb5_context) != 0) {
1444                 return LDB_ERR_OPERATIONS_ERROR;
1445         }
1446
1447         ZERO_STRUCT(io);
1448         io.ac                           = ac;
1449         io.domain                       = domain;
1450         io.smb_krb5_context             = smb_krb5_context;
1451
1452         io.u.user_account_control       = samdb_result_uint(msg, "userAccountControl", 0);
1453         io.u.sAMAccountName             = samdb_result_string(msg, "samAccountName", NULL);
1454         io.u.user_principal_name        = samdb_result_string(msg, "userPrincipalName", NULL);
1455         io.u.is_computer                = ldb_msg_check_string_attribute(msg, "objectClass", "computer");
1456
1457         io.n.cleartext                  = samdb_result_string(msg, "userPassword", NULL);
1458         io.n.nt_hash                    = samdb_result_hash(io.ac, msg, "unicodePwd");
1459         io.n.lm_hash                    = samdb_result_hash(io.ac, msg, "dBCSPwd");
1460
1461         /* remove attributes */
1462         if (io.n.cleartext) ldb_msg_remove_attr(msg, "userPassword");
1463         if (io.n.nt_hash) ldb_msg_remove_attr(msg, "unicodePwd");
1464         if (io.n.lm_hash) ldb_msg_remove_attr(msg, "dBCSPwd");
1465         ldb_msg_remove_attr(msg, "pwdLastSet");
1466         io.o.kvno = samdb_result_uint(msg, "msDs-KeyVersionNumber", 1) - 1;
1467         ldb_msg_remove_attr(msg, "msDs-KeyVersionNumber");
1468
1469         ret = setup_password_fields(&io);
1470         if (ret != LDB_SUCCESS) {
1471                 return ret;
1472         }
1473
1474         if (io.g.nt_hash) {
1475                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1476                                          "unicodePwd", io.g.nt_hash);
1477                 if (ret != LDB_SUCCESS) {
1478                         return ret;
1479                 }
1480         }
1481         if (io.g.lm_hash) {
1482                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1483                                          "dBCSPwd", io.g.lm_hash);
1484                 if (ret != LDB_SUCCESS) {
1485                         return ret;
1486                 }
1487         }
1488         if (io.g.nt_history_len > 0) {
1489                 ret = samdb_msg_add_hashes(ac, msg,
1490                                            "ntPwdHistory",
1491                                            io.g.nt_history,
1492                                            io.g.nt_history_len);
1493                 if (ret != LDB_SUCCESS) {
1494                         return ret;
1495                 }
1496         }
1497         if (io.g.lm_history_len > 0) {
1498                 ret = samdb_msg_add_hashes(ac, msg,
1499                                            "lmPwdHistory",
1500                                            io.g.lm_history,
1501                                            io.g.lm_history_len);
1502                 if (ret != LDB_SUCCESS) {
1503                         return ret;
1504                 }
1505         }
1506         if (io.g.supplemental.length > 0) {
1507                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
1508                                         &io.g.supplemental, NULL);
1509                 if (ret != LDB_SUCCESS) {
1510                         return ret;
1511                 }
1512         }
1513         ret = samdb_msg_add_uint64(ac->module->ldb, ac, msg,
1514                                    "pwdLastSet",
1515                                    io.g.last_set);
1516         if (ret != LDB_SUCCESS) {
1517                 return ret;
1518         }
1519         ret = samdb_msg_add_uint(ac->module->ldb, ac, msg,
1520                                  "msDs-KeyVersionNumber",
1521                                  io.g.kvno);
1522         if (ret != LDB_SUCCESS) {
1523                 return ret;
1524         }
1525
1526         h->state = LDB_ASYNC_INIT;
1527         h->status = LDB_SUCCESS;
1528
1529         ac->step = PH_ADD_DO_ADD;
1530
1531         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->down_req);
1532
1533         /* perform the operation */
1534         return ldb_next_request(ac->module, ac->down_req);
1535 }
1536
1537 static int password_hash_mod_search_self(struct ldb_handle *h);
1538
1539 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
1540 {
1541         struct ldb_handle *h;
1542         struct ph_context *ac;
1543         struct ldb_message_element *sambaAttr;
1544         struct ldb_message_element *ntAttr;
1545         struct ldb_message_element *lmAttr;
1546         struct ldb_message *msg;
1547
1548         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
1549
1550         if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
1551                 return ldb_next_request(module, req);
1552         }
1553
1554         /* If the caller is manipulating the local passwords directly, let them pass */
1555         if (ldb_dn_compare_base(ldb_dn_new(req, module->ldb, LOCAL_BASE),
1556                                 req->op.mod.message->dn) == 0) {
1557                 return ldb_next_request(module, req);
1558         }
1559
1560         /* nobody must touch password Histories */
1561         if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
1562                 return LDB_ERR_UNWILLING_TO_PERFORM;
1563         }
1564         if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
1565                 return LDB_ERR_UNWILLING_TO_PERFORM;
1566         }
1567         if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
1568                 return LDB_ERR_UNWILLING_TO_PERFORM;
1569         }
1570
1571         sambaAttr = ldb_msg_find_element(req->op.mod.message, "userPassword");
1572         ntAttr = ldb_msg_find_element(req->op.mod.message, "unicodePwd");
1573         lmAttr = ldb_msg_find_element(req->op.mod.message, "dBCSPwd");
1574
1575         /* If no part of this touches the userPassword OR unicodePwd and/or dBCSPwd, then we don't
1576          * need to make any changes.  For password changes/set there should
1577          * be a 'delete' or a 'modify' on this attribute. */
1578         if ((!sambaAttr) && (!ntAttr) && (!lmAttr)) {
1579                 return ldb_next_request(module, req);
1580         }
1581
1582         /* check passwords are single valued here */
1583         /* TODO: remove this when passwords will be single valued in schema */
1584         if (sambaAttr && (sambaAttr->num_values > 1)) {
1585                 return LDB_ERR_CONSTRAINT_VIOLATION;
1586         }
1587         if (ntAttr && (ntAttr->num_values > 1)) {
1588                 return LDB_ERR_CONSTRAINT_VIOLATION;
1589         }
1590         if (lmAttr && (lmAttr->num_values > 1)) {
1591                 return LDB_ERR_CONSTRAINT_VIOLATION;
1592         }
1593
1594         h = ph_init_handle(req, module, PH_MOD);
1595         if (!h) {
1596                 return LDB_ERR_OPERATIONS_ERROR;
1597         }
1598         ac = talloc_get_type(h->private_data, struct ph_context);
1599
1600         /* return or own handle to deal with this call */
1601         req->handle = h;
1602
1603         /* prepare the first operation */
1604         ac->down_req = talloc_zero(ac, struct ldb_request);
1605         if (ac->down_req == NULL) {
1606                 ldb_set_errstring(module->ldb, "Out of memory!");
1607                 return LDB_ERR_OPERATIONS_ERROR;
1608         }
1609
1610         *(ac->down_req) = *req; /* copy the request */
1611
1612         /* use a new message structure so that we can modify it */
1613         ac->down_req->op.mod.message = msg = ldb_msg_copy_shallow(ac->down_req, req->op.mod.message);
1614
1615         /* - remove any imodification to the password from the first commit
1616          *   we will make the real modification later */
1617         if (sambaAttr) ldb_msg_remove_attr(msg, "userPassword");
1618         if (ntAttr) ldb_msg_remove_attr(msg, "unicodePwd");
1619         if (lmAttr) ldb_msg_remove_attr(msg, "dBCSPwd");
1620
1621         /* if there was nothing else to be modify skip to next step */
1622         if (msg->num_elements == 0) {
1623                 talloc_free(ac->down_req);
1624                 ac->down_req = NULL;
1625                 return password_hash_mod_search_self(h);
1626         }
1627
1628         ac->down_req->context = NULL;
1629         ac->down_req->callback = NULL;
1630
1631         ac->step = PH_MOD_DO_REQ;
1632
1633         ldb_set_timeout_from_prev_req(module->ldb, req, ac->down_req);
1634
1635         return ldb_next_request(module, ac->down_req);
1636 }
1637
1638 static int get_self_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
1639 {
1640         struct ph_context *ac;
1641
1642         ac = talloc_get_type(context, struct ph_context);
1643
1644         /* we are interested only in the single reply (base search) we receive here */
1645         if (ares->type == LDB_REPLY_ENTRY) {
1646                 if (ac->search_res != NULL) {
1647                         ldb_set_errstring(ldb, "Too many results");
1648                         talloc_free(ares);
1649                         return LDB_ERR_OPERATIONS_ERROR;
1650                 }
1651
1652                 /* if it is not an entry of type person this is an error */
1653                 /* TODO: remove this when userPassword will be in schema */
1654                 if (!ldb_msg_check_string_attribute(ares->message, "objectClass", "person")) {
1655                         ldb_set_errstring(ldb, "Object class violation");
1656                         talloc_free(ares);
1657                         return LDB_ERR_OBJECT_CLASS_VIOLATION;
1658                 }
1659
1660                 ac->search_res = talloc_steal(ac, ares);
1661         } else {
1662                 talloc_free(ares);
1663         }
1664
1665         return LDB_SUCCESS;
1666 }
1667
1668 static int password_hash_mod_search_self(struct ldb_handle *h) {
1669
1670         struct ph_context *ac;
1671         static const char * const attrs[] = { "userAccountControl", "lmPwdHistory",
1672                                               "ntPwdHistory",
1673                                               "objectSid", "msDS-KeyVersionNumber",
1674                                               "objectClass", "userPrincipalName",
1675                                               "sAMAccountName",
1676                                               "dBCSPwd", "unicodePwd",
1677                                               "supplementalCredentials",
1678                                               NULL };
1679
1680         ac = talloc_get_type(h->private_data, struct ph_context);
1681
1682         /* prepare the search operation */
1683         ac->search_req = talloc_zero(ac, struct ldb_request);
1684         if (ac->search_req == NULL) {
1685                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1686                 return LDB_ERR_OPERATIONS_ERROR;
1687         }
1688
1689         ac->search_req->operation = LDB_SEARCH;
1690         ac->search_req->op.search.base = ac->orig_req->op.mod.message->dn;
1691         ac->search_req->op.search.scope = LDB_SCOPE_BASE;
1692         ac->search_req->op.search.tree = ldb_parse_tree(ac->search_req, NULL);
1693         if (ac->search_req->op.search.tree == NULL) {
1694                 ldb_set_errstring(ac->module->ldb, "Invalid search filter");
1695                 return LDB_ERR_OPERATIONS_ERROR;
1696         }
1697         ac->search_req->op.search.attrs = attrs;
1698         ac->search_req->controls = NULL;
1699         ac->search_req->context = ac;
1700         ac->search_req->callback = get_self_callback;
1701         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req);
1702
1703         ac->step = PH_MOD_SEARCH_SELF;
1704
1705         return ldb_next_request(ac->module, ac->search_req);
1706 }
1707
1708 static int password_hash_mod_search_dom(struct ldb_handle *h) {
1709
1710         struct ph_context *ac;
1711         int ret;
1712
1713         ac = talloc_get_type(h->private_data, struct ph_context);
1714
1715         /* get object domain sid */
1716         ac->domain_sid = samdb_result_sid_prefix(ac, ac->search_res->message, "objectSid");
1717         if (ac->domain_sid == NULL) {
1718                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "can't handle entry with missing objectSid!\n");
1719                 return LDB_ERR_OPERATIONS_ERROR;
1720         }
1721
1722         /* get user domain data */
1723         ret = build_domain_data_request(ac);
1724         if (ret != LDB_SUCCESS) {
1725                 return ret;
1726         }
1727
1728         ac->step = PH_MOD_SEARCH_DOM;
1729
1730         return ldb_next_request(ac->module, ac->dom_req);
1731 }
1732
1733 static int password_hash_mod_do_mod(struct ldb_handle *h) {
1734
1735         struct ph_context *ac;
1736         struct domain_data *domain;
1737         struct smb_krb5_context *smb_krb5_context;
1738         struct ldb_message *msg;
1739         struct ldb_message *orig_msg;
1740         struct ldb_message *searched_msg;
1741         struct setup_password_fields_io io;
1742         int ret;
1743
1744         ac = talloc_get_type(h->private_data, struct ph_context);
1745
1746         domain = get_domain_data(ac->module, ac, ac->dom_res);
1747         if (domain == NULL) {
1748                 return LDB_ERR_OPERATIONS_ERROR;
1749         }
1750
1751         ac->mod_req = talloc(ac, struct ldb_request);
1752         if (ac->mod_req == NULL) {
1753                 return LDB_ERR_OPERATIONS_ERROR;
1754         }
1755
1756         *(ac->mod_req) = *(ac->orig_req);
1757
1758         /* use a new message structure so that we can modify it */
1759         ac->mod_req->op.mod.message = msg = ldb_msg_new(ac->mod_req);
1760         if (msg == NULL) {
1761                 return LDB_ERR_OPERATIONS_ERROR;
1762         }
1763
1764         /* modify dn */
1765         msg->dn = ac->orig_req->op.mod.message->dn;
1766
1767         /* Some operations below require kerberos contexts */
1768         if (smb_krb5_init_context(ac->mod_req,
1769                                   ldb_get_opaque(h->module->ldb, "EventContext"),
1770                                   (struct loadparm_context *)ldb_get_opaque(h->module->ldb, "loadparm"),
1771                                   &smb_krb5_context) != 0) {
1772                 return LDB_ERR_OPERATIONS_ERROR;
1773         }
1774
1775         orig_msg        = discard_const(ac->orig_req->op.mod.message);
1776         searched_msg    = ac->search_res->message;
1777
1778         ZERO_STRUCT(io);
1779         io.ac                           = ac;
1780         io.domain                       = domain;
1781         io.smb_krb5_context             = smb_krb5_context;
1782
1783         io.u.user_account_control       = samdb_result_uint(searched_msg, "userAccountControl", 0);
1784         io.u.sAMAccountName             = samdb_result_string(searched_msg, "samAccountName", NULL);
1785         io.u.user_principal_name        = samdb_result_string(searched_msg, "userPrincipalName", NULL);
1786         io.u.is_computer                = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
1787
1788         io.n.cleartext                  = samdb_result_string(orig_msg, "userPassword", NULL);
1789         io.n.nt_hash                    = samdb_result_hash(io.ac, orig_msg, "unicodePwd");
1790         io.n.lm_hash                    = samdb_result_hash(io.ac, orig_msg, "dBCSPwd");
1791
1792         io.o.kvno                       = samdb_result_uint(searched_msg, "msDs-KeyVersionNumber", 0);
1793         io.o.nt_history_len             = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
1794         io.o.lm_history_len             = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
1795         io.o.supplemental               = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
1796
1797         ret = setup_password_fields(&io);
1798         if (ret != LDB_SUCCESS) {
1799                 return ret;
1800         }
1801
1802         /* make sure we replace all the old attributes */
1803         ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
1804         ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
1805         ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
1806         ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
1807         ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
1808         ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
1809         ret = ldb_msg_add_empty(msg, "msDs-KeyVersionNumber", LDB_FLAG_MOD_REPLACE, NULL);
1810
1811         if (io.g.nt_hash) {
1812                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1813                                          "unicodePwd", io.g.nt_hash);
1814                 if (ret != LDB_SUCCESS) {
1815                         return ret;
1816                 }
1817         }
1818         if (io.g.lm_hash) {
1819                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1820                                          "dBCSPwd", io.g.lm_hash);
1821                 if (ret != LDB_SUCCESS) {
1822                         return ret;
1823                 }
1824         }
1825         if (io.g.nt_history_len > 0) {
1826                 ret = samdb_msg_add_hashes(ac, msg,
1827                                            "ntPwdHistory",
1828                                            io.g.nt_history,
1829                                            io.g.nt_history_len);
1830                 if (ret != LDB_SUCCESS) {
1831                         return ret;
1832                 }
1833         }
1834         if (io.g.lm_history_len > 0) {
1835                 ret = samdb_msg_add_hashes(ac, msg,
1836                                            "lmPwdHistory",
1837                                            io.g.lm_history,
1838                                            io.g.lm_history_len);
1839                 if (ret != LDB_SUCCESS) {
1840                         return ret;
1841                 }
1842         }
1843         if (io.g.supplemental.length > 0) {
1844                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
1845                                         &io.g.supplemental, NULL);
1846                 if (ret != LDB_SUCCESS) {
1847                         return ret;
1848                 }
1849         }
1850         ret = samdb_msg_add_uint64(ac->module->ldb, ac, msg,
1851                                    "pwdLastSet",
1852                                    io.g.last_set);
1853         if (ret != LDB_SUCCESS) {
1854                 return ret;
1855         }
1856         ret = samdb_msg_add_uint(ac->module->ldb, ac, msg,
1857                                  "msDs-KeyVersionNumber",
1858                                  io.g.kvno);
1859         if (ret != LDB_SUCCESS) {
1860                 return ret;
1861         }
1862
1863         h->state = LDB_ASYNC_INIT;
1864         h->status = LDB_SUCCESS;
1865
1866         ac->step = PH_MOD_DO_MOD;
1867
1868         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->mod_req);
1869
1870         /* perform the search */
1871         return ldb_next_request(ac->module, ac->mod_req);
1872 }
1873
1874 static int ph_wait(struct ldb_handle *handle) {
1875         struct ph_context *ac;
1876         int ret;
1877
1878         if (!handle || !handle->private_data) {
1879                 return LDB_ERR_OPERATIONS_ERROR;
1880         }
1881
1882         if (handle->state == LDB_ASYNC_DONE) {
1883                 return handle->status;
1884         }
1885
1886         handle->state = LDB_ASYNC_PENDING;
1887         handle->status = LDB_SUCCESS;
1888
1889         ac = talloc_get_type(handle->private_data, struct ph_context);
1890
1891         switch (ac->step) {
1892         case PH_ADD_SEARCH_DOM:
1893                 ret = ldb_wait(ac->dom_req->handle, LDB_WAIT_NONE);
1894
1895                 if (ret != LDB_SUCCESS) {
1896                         handle->status = ret;
1897                         goto done;
1898                 }
1899                 if (ac->dom_req->handle->status != LDB_SUCCESS) {
1900                         handle->status = ac->dom_req->handle->status;
1901                         goto done;
1902                 }
1903
1904                 if (ac->dom_req->handle->state != LDB_ASYNC_DONE) {
1905                         return LDB_SUCCESS;
1906                 }
1907
1908                 /* domain search done, go on */
1909                 return password_hash_add_do_add(handle);
1910
1911         case PH_ADD_DO_ADD:
1912                 ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE);
1913
1914                 if (ret != LDB_SUCCESS) {
1915                         handle->status = ret;
1916                         goto done;
1917                 }
1918                 if (ac->down_req->handle->status != LDB_SUCCESS) {
1919                         handle->status = ac->down_req->handle->status;
1920                         goto done;
1921                 }
1922
1923                 if (ac->down_req->handle->state != LDB_ASYNC_DONE) {
1924                         return LDB_SUCCESS;
1925                 }
1926
1927                 break;
1928
1929         case PH_MOD_DO_REQ:
1930                 ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE);
1931
1932                 if (ret != LDB_SUCCESS) {
1933                         handle->status = ret;
1934                         goto done;
1935                 }
1936                 if (ac->down_req->handle->status != LDB_SUCCESS) {
1937                         handle->status = ac->down_req->handle->status;
1938                         goto done;
1939                 }
1940
1941                 if (ac->down_req->handle->state != LDB_ASYNC_DONE) {
1942                         return LDB_SUCCESS;
1943                 }
1944
1945                 /* non-password mods done, go on */
1946                 return password_hash_mod_search_self(handle);
1947
1948         case PH_MOD_SEARCH_SELF:
1949                 ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE);
1950
1951                 if (ret != LDB_SUCCESS) {
1952                         handle->status = ret;
1953                         goto done;
1954                 }
1955                 if (ac->search_req->handle->status != LDB_SUCCESS) {
1956                         handle->status = ac->search_req->handle->status;
1957                         goto done;
1958                 }
1959
1960                 if (ac->search_req->handle->state != LDB_ASYNC_DONE) {
1961                         return LDB_SUCCESS;
1962                 }
1963
1964                 if (ac->search_res == NULL) {
1965                         return LDB_ERR_NO_SUCH_OBJECT;
1966                 }
1967
1968                 /* self search done, go on */
1969                 return password_hash_mod_search_dom(handle);
1970
1971         case PH_MOD_SEARCH_DOM:
1972                 ret = ldb_wait(ac->dom_req->handle, LDB_WAIT_NONE);
1973
1974                 if (ret != LDB_SUCCESS) {
1975                         handle->status = ret;
1976                         goto done;
1977                 }
1978                 if (ac->dom_req->handle->status != LDB_SUCCESS) {
1979                         handle->status = ac->dom_req->handle->status;
1980                         goto done;
1981                 }
1982
1983                 if (ac->dom_req->handle->state != LDB_ASYNC_DONE) {
1984                         return LDB_SUCCESS;
1985                 }
1986
1987                 /* domain search done, go on */
1988                 return password_hash_mod_do_mod(handle);
1989
1990         case PH_MOD_DO_MOD:
1991                 ret = ldb_wait(ac->mod_req->handle, LDB_WAIT_NONE);
1992
1993                 if (ret != LDB_SUCCESS) {
1994                         handle->status = ret;
1995                         goto done;
1996                 }
1997                 if (ac->mod_req->handle->status != LDB_SUCCESS) {
1998                         handle->status = ac->mod_req->handle->status;
1999                         goto done;
2000                 }
2001
2002                 if (ac->mod_req->handle->state != LDB_ASYNC_DONE) {
2003                         return LDB_SUCCESS;
2004                 }
2005
2006                 break;
2007
2008         default:
2009                 ret = LDB_ERR_OPERATIONS_ERROR;
2010                 goto done;
2011         }
2012
2013         ret = LDB_SUCCESS;
2014
2015 done:
2016         handle->state = LDB_ASYNC_DONE;
2017         return ret;
2018 }
2019
2020 static int ph_wait_all(struct ldb_handle *handle) {
2021
2022         int ret;
2023
2024         while (handle->state != LDB_ASYNC_DONE) {
2025                 ret = ph_wait(handle);
2026                 if (ret != LDB_SUCCESS) {
2027                         return ret;
2028                 }
2029         }
2030
2031         return handle->status;
2032 }
2033
2034 static int password_hash_wait(struct ldb_handle *handle, enum ldb_wait_type type)
2035 {
2036         if (type == LDB_WAIT_ALL) {
2037                 return ph_wait_all(handle);
2038         } else {
2039                 return ph_wait(handle);
2040         }
2041 }
2042
2043 _PUBLIC_ const struct ldb_module_ops ldb_password_hash_module_ops = {
2044         .name          = "password_hash",
2045         .add           = password_hash_add,
2046         .modify        = password_hash_modify,
2047         .wait          = password_hash_wait
2048 };