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 (old_scb->sub.packages[i].unknown1 != 0x00000001) {
 450                         continue;
 451                 }
 452
 453                 if (strcmp("Primary:Kerberos", old_scb->sub.packages[i].name) != 0) {
 454                         continue;
 455                 }
 456
 457                 if (!old_scb->sub.packages[i].data || !old_scb->sub.packages[i].data[0]) {
 458                         continue;
 459                 }
 460
 461                 old_scp = &old_scb->sub.packages[i];
 462                 break;
 463         }
 464         /* Primary:Kerberos element of supplementalCredentials */
 465         if (old_scp) {
 466                 DATA_BLOB blob;
 467
 468                 blob = strhex_to_data_blob(old_scp->data);
 469                 if (!blob.data) {
 470                         ldb_oom(io->ac->module->ldb);
 471                         return LDB_ERR_OPERATIONS_ERROR;
 472                 }
 473                 talloc_steal(io->ac, blob.data);
 474
 475                 /* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
 476                 ndr_err = ndr_pull_struct_blob(&blob, io->ac, lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")), &_old_pkb,
 477                                                (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
 478                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 479                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 480                         ldb_asprintf_errstring(io->ac->module->ldb,
 481                                                "setup_primary_kerberos: "
 482                                                "failed to pull old package_PrimaryKerberosBlob: %s",
 483                                                nt_errstr(status));
 484                         return LDB_ERR_OPERATIONS_ERROR;
 485                 }
 486
 487                 if (_old_pkb.version != 3) {
 488                         ldb_asprintf_errstring(io->ac->module->ldb,
 489                                                "setup_primary_kerberos: "
 490                                                "package_PrimaryKerberosBlob version[%u] expected[3]",
 491                                                _old_pkb.version);
 492                         return LDB_ERR_OPERATIONS_ERROR;
 493                 }
 494
 495                 old_pkb3 = &_old_pkb.ctr.ctr3;
 496         }
 497
 498         /* if we didn't found the old keys we're done */
 499         if (!old_pkb3) {
 500                 return LDB_SUCCESS;
 501         }
 502
 503         /* fill in the old keys */
 504         pkb3->num_old_keys      = old_pkb3->num_keys;
 505         pkb3->old_keys          = old_pkb3->keys;
 506         pkb3->unknown3_old      = old_pkb3->unknown3;
 507
 508         return LDB_SUCCESS;
 509 }
 510
 511 static int setup_primary_wdigest(struct setup_password_fields_io *io,
 512                                  const struct supplementalCredentialsBlob *old_scb,
 513                                  struct package_PrimaryWDigestBlob *pdb)
 514 {
 515         DATA_BLOB sAMAccountName;
 516         DATA_BLOB sAMAccountName_l;
 517         DATA_BLOB sAMAccountName_u;
 518         const char *user_principal_name = io->u.user_principal_name;
 519         DATA_BLOB userPrincipalName;
 520         DATA_BLOB userPrincipalName_l;
 521         DATA_BLOB userPrincipalName_u;
 522         DATA_BLOB netbios_domain;
 523         DATA_BLOB netbios_domain_l;
 524         DATA_BLOB netbios_domain_u;
 525         DATA_BLOB dns_domain;
 526         DATA_BLOB dns_domain_l;
 527         DATA_BLOB dns_domain_u;
 528         DATA_BLOB cleartext;
 529         DATA_BLOB digest;
 530         DATA_BLOB delim;
 531         DATA_BLOB backslash;
 532         uint8_t i;
 533         struct {
 534                 DATA_BLOB *user;
 535                 DATA_BLOB *realm;
 536                 DATA_BLOB *nt4dom;
 537         } wdigest[] = {
 538         /*
 539          * See
 540          * http://technet2.microsoft.com/WindowsServer/en/library/717b450c-f4a0-4cc9-86f4-cc0633aae5f91033.mspx?mfr=true
 541          * for what precalculated hashes are supposed to be stored...
 542          *
 543          * I can't reproduce all values which should contain "Digest" as realm,
 544          * am I doing something wrong or is w2k3 just broken...?
 545          *
 546          * W2K3 fills in following for a user:
 547          *
 548          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
 549          * sAMAccountName: NewUser2Sam
 550          * userPrincipalName: NewUser2Princ@sub1.w2k3.vmnet1.vm.base
 551          *
 552          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 553          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
 554          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
 555          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 556          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
 557          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
 558          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
 559          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 560          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 561          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 562          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 563          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 564          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 565          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 566          * 221c55284451ae9b3aacaa2a3c86f10f => NewUser2Princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 567          * 74e1be668853d4324d38c07e2acfb8ea => (w2k3 has a bug here!) newuser2princ@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 568          * e1e244ab7f098e3ae1761be7f9229bbb => NEWUSER2PRINC@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
 569          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
 570          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
 571          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
 572          * 31dc704d3640335b2123d4ee28aa1f11 => ??? changes with NewUser2Sam => NewUser1Sam
 573          * 36349f5cecd07320fb3bb0e119230c43 => ??? changes with NewUser2Sam => NewUser1Sam
 574          * 12adf019d037fb535c01fd0608e78d9d => ??? changes with NewUser2Sam => NewUser1Sam
 575          * 6feecf8e724906f3ee1105819c5105a1 => ??? changes with NewUser2Princ => NewUser1Princ
 576          * 6c6911f3de6333422640221b9c51ff1f => ??? changes with NewUser2Princ => NewUser1Princ
 577          * 4b279877e742895f9348ac67a8de2f69 => ??? changes with NewUser2Princ => NewUser1Princ
 578          * db0c6bff069513e3ebb9870d29b57490 => ??? changes with NewUser2Sam => NewUser1Sam
 579          * 45072621e56b1c113a4e04a8ff68cd0e => ??? changes with NewUser2Sam => NewUser1Sam
 580          * 11d1220abc44a9c10cf91ef4a9c1de02 => ??? changes with NewUser2Sam => NewUser1Sam
 581          *
 582          * dn: CN=NewUser,OU=newtop,DC=sub1,DC=w2k3,DC=vmnet1,DC=vm,DC=base
 583          * sAMAccountName: NewUser2Sam
 584          *
 585          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 586          * b7ec9da91062199aee7d121e6710fe23 => newuser2sam:sub1:TestPwd2007
 587          * 17d290bc5c9f463fac54c37a8cea134d => NEWUSER2SAM:SUB1:TestPwd2007
 588          * 4279815024bda54fc074a5f8bd0a6e6f => NewUser2Sam:SUB1:TestPwd2007
 589          * 5d57e7823938348127322e08cd81bcb5 => NewUser2Sam:sub1:TestPwd2007
 590          * 07dd701bf8a011ece585de3d47237140 => NEWUSER2SAM:sub1:TestPwd2007
 591          * e14fb0eb401498d2cb33c9aae1cc7f37 => newuser2sam:SUB1:TestPwd2007
 592          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 593          * f52da1266a6bdd290ffd48b2c823dda7 => newuser2sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 594          * d2b42f171248cec37a3c5c6b55404062 => NEWUSER2SAM:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 595          * fff8d790ff6c152aaeb6ebe17b4021de => NewUser2Sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 596          * 8dadc90250f873d8b883f79d890bef82 => NewUser2Sam:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 597          * 2a7563c3715bc418d626dabef378c008 => NEWUSER2SAM:sub1.w2k3.vmnet1.vm.base:TestPwd2007
 598          * c8e9557a87cd4200fda0c11d2fa03f96 => newuser2sam:SUB1.W2K3.VMNET1.VM.BASE:TestPwd2007
 599          * 8a140d30b6f0a5912735dc1e3bc993b4 => NewUser2Sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 600          * 86d95b2faae6cae4ec261e7fbaccf093 => (here w2k3 is correct) newuser2sam@sub1.w2k3.vmnet1.vm.base::TestPwd2007
 601          * dfeff1493110220efcdfc6362e5f5450 => NEWUSER2SAM@SUB1.W2K3.VMNET1.VM.BASE::TestPwd2007
 602          * 86db637df42513039920e605499c3af6 => SUB1\NewUser2Sam::TestPwd2007
 603          * f5e43474dfaf067fee8197a253debaa2 => sub1\newuser2sam::TestPwd2007
 604          * 2ecaa8382e2518e4b77a52422b279467 => SUB1\NEWUSER2SAM::TestPwd2007
 605          * 31dc704d3640335b2123d4ee28aa1f11 => ???M1   changes with NewUser2Sam => NewUser1Sam
 606          * 36349f5cecd07320fb3bb0e119230c43 => ???M1.L changes with newuser2sam => newuser1sam
 607          * 12adf019d037fb535c01fd0608e78d9d => ???M1.U changes with NEWUSER2SAM => NEWUSER1SAM
 608          * 569b4533f2d9e580211dd040e5e360a8 => ???M2   changes with NewUser2Princ => NewUser1Princ
 609          * 52528bddf310a587c5d7e6a9ae2cbb20 => ???M2.L changes with newuser2princ => newuser1princ
 610          * 4f629a4f0361289ca4255ab0f658fcd5 => ???M3 changes with NewUser2Princ => NewUser1Princ (doesn't depend on case of userPrincipal )
 611          * db0c6bff069513e3ebb9870d29b57490 => ???M4 changes with NewUser2Sam => NewUser1Sam
 612          * 45072621e56b1c113a4e04a8ff68cd0e => ???M5 changes with NewUser2Sam => NewUser1Sam (doesn't depend on case of sAMAccountName)
 613          * 11d1220abc44a9c10cf91ef4a9c1de02 => ???M4.U changes with NEWUSER2SAM => NEWUSER1SAM
 614          */
 615
 616         /*
 617          * sAMAccountName, netbios_domain
 618          */
 619                 {
 620                 .user   = &sAMAccountName,
 621                 .realm  = &netbios_domain,
 622                 },
 623                 {
 624                 .user   = &sAMAccountName_l,
 625                 .realm  = &netbios_domain_l,
 626                 },
 627                 {
 628                 .user   = &sAMAccountName_u,
 629                 .realm  = &netbios_domain_u,
 630                 },
 631                 {
 632                 .user   = &sAMAccountName,
 633                 .realm  = &netbios_domain_u,
 634                 },
 635                 {
 636                 .user   = &sAMAccountName,
 637                 .realm  = &netbios_domain_l,
 638                 },
 639                 {
 640                 .user   = &sAMAccountName_u,
 641                 .realm  = &netbios_domain_l,
 642                 },
 643                 {
 644                 .user   = &sAMAccountName_l,
 645                 .realm  = &netbios_domain_u,
 646                 },
 647         /*
 648          * sAMAccountName, dns_domain
 649          */
 650                 {
 651                 .user   = &sAMAccountName,
 652                 .realm  = &dns_domain,
 653                 },
 654                 {
 655                 .user   = &sAMAccountName_l,
 656                 .realm  = &dns_domain_l,
 657                 },
 658                 {
 659                 .user   = &sAMAccountName_u,
 660                 .realm  = &dns_domain_u,
 661                 },
 662                 {
 663                 .user   = &sAMAccountName,
 664                 .realm  = &dns_domain_u,
 665                 },
 666                 {
 667                 .user   = &sAMAccountName,
 668                 .realm  = &dns_domain_l,
 669                 },
 670                 {
 671                 .user   = &sAMAccountName_u,
 672                 .realm  = &dns_domain_l,
 673                 },
 674                 {
 675                 .user   = &sAMAccountName_l,
 676                 .realm  = &dns_domain_u,
 677                 },
 678         /*
 679          * userPrincipalName, no realm
 680          */
 681                 {
 682                 .user   = &userPrincipalName,
 683                 },
 684                 {
 685                 /*
 686                  * NOTE: w2k3 messes this up, if the user has a real userPrincipalName,
 687                  *       the fallback to the sAMAccountName based userPrincipalName is correct
 688                  */
 689                 .user   = &userPrincipalName_l,
 690                 },
 691                 {
 692                 .user   = &userPrincipalName_u,
 693                 },
 694         /*
 695          * nt4dom\sAMAccountName, no realm
 696          */
 697                 {
 698                 .user   = &sAMAccountName,
 699                 .nt4dom = &netbios_domain
 700                 },
 701                 {
 702                 .user   = &sAMAccountName_l,
 703                 .nt4dom = &netbios_domain_l
 704                 },
 705                 {
 706                 .user   = &sAMAccountName_u,
 707                 .nt4dom = &netbios_domain_u
 708                 },
 709
 710         /*
 711          * the following ones are guessed depending on the technet2 article
 712          * but not reproducable on a w2k3 server
 713          */
 714         /* sAMAccountName with "Digest" realm */
 715                 {
 716                 .user   = &sAMAccountName,
 717                 .realm  = &digest
 718                 },
 719                 {
 720                 .user   = &sAMAccountName_l,
 721                 .realm  = &digest
 722                 },
 723                 {
 724                 .user   = &sAMAccountName_u,
 725                 .realm  = &digest
 726                 },
 727         /* userPrincipalName with "Digest" realm */
 728                 {
 729                 .user   = &userPrincipalName,
 730                 .realm  = &digest
 731                 },
 732                 {
 733                 .user   = &userPrincipalName_l,
 734                 .realm  = &digest
 735                 },
 736                 {
 737                 .user   = &userPrincipalName_u,
 738                 .realm  = &digest
 739                 },
 740         /* nt4dom\\sAMAccountName with "Digest" realm */
 741                 {
 742                 .user   = &sAMAccountName,
 743                 .nt4dom = &netbios_domain,
 744                 .realm  = &digest
 745                 },
 746                 {
 747                 .user   = &sAMAccountName_l,
 748                 .nt4dom = &netbios_domain_l,
 749                 .realm  = &digest
 750                 },
 751                 {
 752                 .user   = &sAMAccountName_u,
 753                 .nt4dom = &netbios_domain_u,
 754                 .realm  = &digest
 755                 },
 756         };
 757
 758         /* prepare DATA_BLOB's used in the combinations array */
 759         sAMAccountName          = data_blob_string_const(io->u.sAMAccountName);
 760         sAMAccountName_l        = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
 761         if (!sAMAccountName_l.data) {
 762                 ldb_oom(io->ac->module->ldb);
 763                 return LDB_ERR_OPERATIONS_ERROR;
 764         }
 765         sAMAccountName_u        = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
 766         if (!sAMAccountName_u.data) {
 767                 ldb_oom(io->ac->module->ldb);
 768                 return LDB_ERR_OPERATIONS_ERROR;
 769         }
 770
 771         /* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
 772         if (!user_principal_name) {
 773                 user_principal_name = talloc_asprintf(io->ac, "%s@%s",
 774                                                       io->u.sAMAccountName,
 775                                                       io->domain->dns_domain);
 776                 if (!user_principal_name) {
 777                         ldb_oom(io->ac->module->ldb);
 778                         return LDB_ERR_OPERATIONS_ERROR;
 779                 }
 780         }
 781         userPrincipalName       = data_blob_string_const(user_principal_name);
 782         userPrincipalName_l     = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
 783         if (!userPrincipalName_l.data) {
 784                 ldb_oom(io->ac->module->ldb);
 785                 return LDB_ERR_OPERATIONS_ERROR;
 786         }
 787         userPrincipalName_u     = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
 788         if (!userPrincipalName_u.data) {
 789                 ldb_oom(io->ac->module->ldb);
 790                 return LDB_ERR_OPERATIONS_ERROR;
 791         }
 792
 793         netbios_domain          = data_blob_string_const(io->domain->netbios_domain);
 794         netbios_domain_l        = data_blob_string_const(strlower_talloc(io->ac, io->domain->netbios_domain));
 795         if (!netbios_domain_l.data) {
 796                 ldb_oom(io->ac->module->ldb);
 797                 return LDB_ERR_OPERATIONS_ERROR;
 798         }
 799         netbios_domain_u        = data_blob_string_const(strupper_talloc(io->ac, io->domain->netbios_domain));
 800         if (!netbios_domain_u.data) {
 801                 ldb_oom(io->ac->module->ldb);
 802                 return LDB_ERR_OPERATIONS_ERROR;
 803         }
 804
 805         dns_domain              = data_blob_string_const(io->domain->dns_domain);
 806         dns_domain_l            = data_blob_string_const(io->domain->dns_domain);
 807         dns_domain_u            = data_blob_string_const(io->domain->realm);
 808
 809         cleartext               = data_blob_string_const(io->n.cleartext);
 810
 811         digest                  = data_blob_string_const("Digest");
 812
 813         delim                   = data_blob_string_const(":");
 814         backslash               = data_blob_string_const("\\");
 815
 816         pdb->num_hashes = ARRAY_SIZE(wdigest);
 817         pdb->hashes     = talloc_array(io->ac, struct package_PrimaryWDigestHash, pdb->num_hashes);
 818         if (!pdb->hashes) {
 819                 ldb_oom(io->ac->module->ldb);
 820                 return LDB_ERR_OPERATIONS_ERROR;
 821         }
 822
 823         for (i=0; i < ARRAY_SIZE(wdigest); i++) {
 824                 struct MD5Context md5;
 825                 MD5Init(&md5);
 826                 if (wdigest[i].nt4dom) {
 827                         MD5Update(&md5, wdigest[i].nt4dom->data, wdigest[i].nt4dom->length);
 828                         MD5Update(&md5, backslash.data, backslash.length);
 829                 }
 830                 MD5Update(&md5, wdigest[i].user->data, wdigest[i].user->length);
 831                 MD5Update(&md5, delim.data, delim.length);
 832                 if (wdigest[i].realm) {
 833                         MD5Update(&md5, wdigest[i].realm->data, wdigest[i].realm->length);
 834                 }
 835                 MD5Update(&md5, delim.data, delim.length);
 836                 MD5Update(&md5, cleartext.data, cleartext.length);
 837                 MD5Final(pdb->hashes[i].hash, &md5);
 838         }
 839
 840         return LDB_SUCCESS;
 841 }
 842
 843 static int setup_supplemental_field(struct setup_password_fields_io *io)
 844 {
 845         struct supplementalCredentialsBlob scb;
 846         struct supplementalCredentialsBlob _old_scb;
 847         struct supplementalCredentialsBlob *old_scb = NULL;
 848         /* Packages + (Kerberos, WDigest and maybe CLEARTEXT) */
 849         uint32_t num_packages = 1 + 2;
 850         struct supplementalCredentialsPackage packages[1+3];
 851         struct supplementalCredentialsPackage *pp = &packages[0];
 852         struct supplementalCredentialsPackage *pk = &packages[1];
 853         struct supplementalCredentialsPackage *pd = &packages[2];
 854         struct supplementalCredentialsPackage *pc = NULL;
 855         struct package_PackagesBlob pb;
 856         DATA_BLOB pb_blob;
 857         char *pb_hexstr;
 858         struct package_PrimaryKerberosBlob pkb;
 859         DATA_BLOB pkb_blob;
 860         char *pkb_hexstr;
 861         struct package_PrimaryWDigestBlob pdb;
 862         DATA_BLOB pdb_blob;
 863         char *pdb_hexstr;
 864         struct package_PrimaryCLEARTEXTBlob pcb;
 865         DATA_BLOB pcb_blob;
 866         char *pcb_hexstr;
 867         int ret;
 868         enum ndr_err_code ndr_err;
 869         uint8_t zero16[16];
 870
 871         ZERO_STRUCT(zero16);
 872
 873         if (!io->n.cleartext) {
 874                 /*
 875                  * when we don't have a cleartext password
 876                  * we can't setup a supplementalCredential value
 877                  */
 878                 return LDB_SUCCESS;
 879         }
 880
 881         /* if there's an old supplementaCredentials blob then parse it */
 882         if (io->o.supplemental) {
 883                 ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac, lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")), &_old_scb,
 884                                                    (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
 885                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 886                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 887                         ldb_asprintf_errstring(io->ac->module->ldb,
 888                                                "setup_supplemental_field: "
 889                                                "failed to pull old supplementalCredentialsBlob: %s",
 890                                                nt_errstr(status));
 891                         return LDB_ERR_OPERATIONS_ERROR;
 892                 }
 893
 894                 old_scb = &_old_scb;
 895         }
 896
 897         if (io->domain->store_cleartext &&
 898             (io->u.user_account_control & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
 899                 pc = &packages[3];
 900                 num_packages++;
 901         }
 902
 903         /* Kerberos, WDigest, CLEARTEXT and termination(counted by the Packages element) */
 904         pb.names = talloc_zero_array(io->ac, const char *, num_packages);
 905
 906         /*
 907          * setup 'Primary:Kerberos' element
 908          */
 909         pb.names[0] = "Kerberos";
 910
 911         ret = setup_primary_kerberos(io, old_scb, &pkb);
 912         if (ret != LDB_SUCCESS) {
 913                 return ret;
 914         }
 915
 916         ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
 917                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 918                                        &pkb,
 919                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
 920         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 921                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 922                 ldb_asprintf_errstring(io->ac->module->ldb,
 923                                        "setup_supplemental_field: "
 924                                        "failed to push package_PrimaryKerberosBlob: %s",
 925                                        nt_errstr(status));
 926                 return LDB_ERR_OPERATIONS_ERROR;
 927         }
 928         pkb_hexstr = data_blob_hex_string(io->ac, &pkb_blob);
 929         if (!pkb_hexstr) {
 930                 ldb_oom(io->ac->module->ldb);
 931                 return LDB_ERR_OPERATIONS_ERROR;
 932         }
 933         pk->name        = "Primary:Kerberos";
 934         pk->unknown1    = 1;
 935         pk->data        = pkb_hexstr;
 936
 937         /*
 938          * setup 'Primary:WDigest' element
 939          */
 940         pb.names[1] = "WDigest";
 941
 942         ret = setup_primary_wdigest(io, old_scb, &pdb);
 943         if (ret != LDB_SUCCESS) {
 944                 return ret;
 945         }
 946
 947         ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
 948                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 949                                        &pdb,
 950                                        (ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
 951         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 952                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 953                 ldb_asprintf_errstring(io->ac->module->ldb,
 954                                        "setup_supplemental_field: "
 955                                        "failed to push package_PrimaryWDigestBlob: %s",
 956                                        nt_errstr(status));
 957                 return LDB_ERR_OPERATIONS_ERROR;
 958         }
 959         pdb_hexstr = data_blob_hex_string(io->ac, &pdb_blob);
 960         if (!pdb_hexstr) {
 961                 ldb_oom(io->ac->module->ldb);
 962                 return LDB_ERR_OPERATIONS_ERROR;
 963         }
 964         pd->name        = "Primary:WDigest";
 965         pd->unknown1    = 1;
 966         pd->data        = pdb_hexstr;
 967
 968         /*
 969          * setup 'Primary:CLEARTEXT' element
 970          */
 971         if (pc) {
 972                 pb.names[2]     = "CLEARTEXT";
 973
 974                 pcb.cleartext   = io->n.cleartext;
 975
 976                 ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
 977                                                lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
 978                                                &pcb,
 979                                                (ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
 980                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 981                         NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 982                         ldb_asprintf_errstring(io->ac->module->ldb,
 983                                                "setup_supplemental_field: "
 984                                                "failed to push package_PrimaryCLEARTEXTBlob: %s",
 985                                                nt_errstr(status));
 986                         return LDB_ERR_OPERATIONS_ERROR;
 987                 }
 988                 pcb_hexstr = data_blob_hex_string(io->ac, &pcb_blob);
 989                 if (!pcb_hexstr) {
 990                         ldb_oom(io->ac->module->ldb);
 991                         return LDB_ERR_OPERATIONS_ERROR;
 992                 }
 993                 pc->name        = "Primary:CLEARTEXT";
 994                 pc->unknown1    = 1;
 995                 pc->data        = pcb_hexstr;
 996         }
 997
 998         /*
 999          * setup 'Packages' element
1000          */
1001         ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
1002                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
1003                                        &pb,
1004                                        (ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
1005         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1006                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1007                 ldb_asprintf_errstring(io->ac->module->ldb,
1008                                        "setup_supplemental_field: "
1009                                        "failed to push package_PackagesBlob: %s",
1010                                        nt_errstr(status));
1011                 return LDB_ERR_OPERATIONS_ERROR;
1012         }
1013         pb_hexstr = data_blob_hex_string(io->ac, &pb_blob);
1014         if (!pb_hexstr) {
1015                 ldb_oom(io->ac->module->ldb);
1016                 return LDB_ERR_OPERATIONS_ERROR;
1017         }
1018         pp->name        = "Packages";
1019         pp->unknown1    = 2;
1020         pp->data        = pb_hexstr;
1021
1022         /*
1023          * setup 'supplementalCredentials' value
1024          */
1025         scb.sub.num_packages    = num_packages;
1026         scb.sub.packages        = packages;
1027
1028         ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
1029                                        lp_iconv_convenience(ldb_get_opaque(io->ac->module->ldb, "loadparm")),
1030                                        &scb,
1031                                        (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
1032         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1033                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
1034                 ldb_asprintf_errstring(io->ac->module->ldb,
1035                                        "setup_supplemental_field: "
1036                                        "failed to push supplementalCredentialsBlob: %s",
1037                                        nt_errstr(status));
1038                 return LDB_ERR_OPERATIONS_ERROR;
1039         }
1040
1041         return LDB_SUCCESS;
1042 }
1043
1044 static int setup_last_set_field(struct setup_password_fields_io *io)
1045 {
1046         /* set it as now */
1047         unix_to_nt_time(&io->g.last_set, time(NULL));
1048
1049         return LDB_SUCCESS;
1050 }
1051
1052 static int setup_kvno_field(struct setup_password_fields_io *io)
1053 {
1054         /* increment by one */
1055         io->g.kvno = io->o.kvno + 1;
1056
1057         return LDB_SUCCESS;
1058 }
1059
1060 static int setup_password_fields(struct setup_password_fields_io *io)
1061 {
1062         bool ok;
1063         int ret;
1064
1065         /*
1066          * refuse the change if someone want to change the cleartext
1067          * and supply his own hashes at the same time...
1068          */
1069         if (io->n.cleartext && (io->n.nt_hash || io->n.lm_hash)) {
1070                 ldb_asprintf_errstring(io->ac->module->ldb,
1071                                        "setup_password_fields: "
1072                                        "it's only allowed to set the cleartext password or the password hashes");
1073                 return LDB_ERR_UNWILLING_TO_PERFORM;
1074         }
1075
1076         if (io->n.cleartext && !io->n.nt_hash) {
1077                 struct samr_Password *hash;
1078
1079                 hash = talloc(io->ac, struct samr_Password);
1080                 if (!hash) {
1081                         ldb_oom(io->ac->module->ldb);
1082                         return LDB_ERR_OPERATIONS_ERROR;
1083                 }
1084
1085                 /* compute the new nt hash */
1086                 ok = E_md4hash(io->n.cleartext, hash->hash);
1087                 if (ok) {
1088                         io->n.nt_hash = hash;
1089                 } else {
1090                         ldb_asprintf_errstring(io->ac->module->ldb,
1091                                                "setup_password_fields: "
1092                                                "failed to generate nthash from cleartext password");
1093                         return LDB_ERR_OPERATIONS_ERROR;
1094                 }
1095         }
1096
1097         if (io->n.cleartext && !io->n.lm_hash) {
1098                 struct samr_Password *hash;
1099
1100                 hash = talloc(io->ac, struct samr_Password);
1101                 if (!hash) {
1102                         ldb_oom(io->ac->module->ldb);
1103                         return LDB_ERR_OPERATIONS_ERROR;
1104                 }
1105
1106                 /* compute the new lm hash */
1107                 ok = E_deshash(io->n.cleartext, hash->hash);
1108                 if (ok) {
1109                         io->n.lm_hash = hash;
1110                 } else {
1111                         talloc_free(hash->hash);
1112                 }
1113         }
1114
1115         ret = setup_nt_fields(io);
1116         if (ret != 0) {
1117                 return ret;
1118         }
1119
1120         ret = setup_lm_fields(io);
1121         if (ret != 0) {
1122                 return ret;
1123         }
1124
1125         ret = setup_supplemental_field(io);
1126         if (ret != 0) {
1127                 return ret;
1128         }
1129
1130         ret = setup_last_set_field(io);
1131         if (ret != 0) {
1132                 return ret;
1133         }
1134
1135         ret = setup_kvno_field(io);
1136         if (ret != 0) {
1137                 return ret;
1138         }
1139
1140         return LDB_SUCCESS;
1141 }
1142
1143 static struct ldb_handle *ph_init_handle(struct ldb_request *req, struct ldb_module *module, enum ph_type type)
1144 {
1145         struct ph_context *ac;
1146         struct ldb_handle *h;
1147
1148         h = talloc_zero(req, struct ldb_handle);
1149         if (h == NULL) {
1150                 ldb_set_errstring(module->ldb, "Out of Memory");
1151                 return NULL;
1152         }
1153
1154         h->module = module;
1155
1156         ac = talloc_zero(h, struct ph_context);
1157         if (ac == NULL) {
1158                 ldb_set_errstring(module->ldb, "Out of Memory");
1159                 talloc_free(h);
1160                 return NULL;
1161         }
1162
1163         h->private_data = (void *)ac;
1164
1165         h->state = LDB_ASYNC_INIT;
1166         h->status = LDB_SUCCESS;
1167
1168         ac->type = type;
1169         ac->module = module;
1170         ac->orig_req = req;
1171
1172         return h;
1173 }
1174
1175 static int get_domain_data_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
1176 {
1177         struct ph_context *ac;
1178
1179         ac = talloc_get_type(context, struct ph_context);
1180
1181         /* we are interested only in the single reply (base search) we receive here */
1182         if (ares->type == LDB_REPLY_ENTRY) {
1183                 if (ac->dom_res != NULL) {
1184                         ldb_set_errstring(ldb, "Too many results");
1185                         talloc_free(ares);
1186                         return LDB_ERR_OPERATIONS_ERROR;
1187                 }
1188                 ac->dom_res = talloc_steal(ac, ares);
1189         } else {
1190                 talloc_free(ares);
1191         }
1192
1193         return LDB_SUCCESS;
1194 }
1195
1196 static int build_domain_data_request(struct ph_context *ac)
1197 {
1198         /* attrs[] is returned from this function in
1199            ac->dom_req->op.search.attrs, so it must be static, as
1200            otherwise the compiler can put it on the stack */
1201         static const char * const attrs[] = { "pwdProperties", "pwdHistoryLength", NULL };
1202         char *filter;
1203
1204         ac->dom_req = talloc_zero(ac, struct ldb_request);
1205         if (ac->dom_req == NULL) {
1206                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1207                 return LDB_ERR_OPERATIONS_ERROR;
1208         }
1209         ac->dom_req->operation = LDB_SEARCH;
1210         ac->dom_req->op.search.base = ldb_get_default_basedn(ac->module->ldb);
1211         ac->dom_req->op.search.scope = LDB_SCOPE_SUBTREE;
1212
1213         filter = talloc_asprintf(ac->dom_req,
1214                                  "(&(objectSid=%s)(|(|(objectClass=domain)(objectClass=builtinDomain))(objectClass=samba4LocalDomain)))",
1215                                  ldap_encode_ndr_dom_sid(ac->dom_req, ac->domain_sid));
1216         if (filter == NULL) {
1217                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1218                 talloc_free(ac->dom_req);
1219                 return LDB_ERR_OPERATIONS_ERROR;
1220         }
1221
1222         ac->dom_req->op.search.tree = ldb_parse_tree(ac->dom_req, filter);
1223         if (ac->dom_req->op.search.tree == NULL) {
1224                 ldb_set_errstring(ac->module->ldb, "Invalid search filter");
1225                 talloc_free(ac->dom_req);
1226                 return LDB_ERR_OPERATIONS_ERROR;
1227         }
1228         ac->dom_req->op.search.attrs = attrs;
1229         ac->dom_req->controls = NULL;
1230         ac->dom_req->context = ac;
1231         ac->dom_req->callback = get_domain_data_callback;
1232         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->dom_req);
1233
1234         return LDB_SUCCESS;
1235 }
1236
1237 static struct domain_data *get_domain_data(struct ldb_module *module, void *ctx, struct ldb_reply *res)
1238 {
1239         struct domain_data *data;
1240         const char *tmp;
1241         struct ph_context *ac;
1242         char *p;
1243
1244         ac = talloc_get_type(ctx, struct ph_context);
1245
1246         data = talloc_zero(ac, struct domain_data);
1247         if (data == NULL) {
1248                 return NULL;
1249         }
1250
1251         if (res == NULL) {
1252                 ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Could not find this user's domain: %s!\n", dom_sid_string(data, ac->domain_sid));
1253                 talloc_free(data);
1254                 return NULL;
1255         }
1256
1257         data->pwdProperties= samdb_result_uint(res->message, "pwdProperties", 0);
1258         data->store_cleartext = data->pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
1259         data->pwdHistoryLength = samdb_result_uint(res->message, "pwdHistoryLength", 0);
1260
1261         /* For a domain DN, this puts things in dotted notation */
1262         /* For builtin domains, this will give details for the host,
1263          * but that doesn't really matter, as it's just used for salt
1264          * and kerberos principals, which don't exist here */
1265
1266         tmp = ldb_dn_canonical_string(ctx, res->message->dn);
1267         if (!tmp) {
1268                 return NULL;
1269         }
1270
1271         /* But it puts a trailing (or just before 'builtin') / on things, so kill that */
1272         p = strchr(tmp, '/');
1273         if (p) {
1274                 p[0] = '\0';
1275         }
1276
1277         if (tmp != NULL) {
1278                 data->dns_domain = strlower_talloc(data, tmp);
1279                 if (data->dns_domain == NULL) {
1280                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1281                         return NULL;
1282                 }
1283                 data->realm = strupper_talloc(data, tmp);
1284                 if (data->realm == NULL) {
1285                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1286                         return NULL;
1287                 }
1288                 p = strchr(tmp, '.');
1289                 if (p) {
1290                         p[0] = '\0';
1291                 }
1292                 data->netbios_domain = strupper_talloc(data, tmp);
1293                 if (data->netbios_domain == NULL) {
1294                         ldb_debug(module->ldb, LDB_DEBUG_ERROR, "Out of memory!\n");
1295                         return NULL;
1296                 }
1297         }
1298
1299         return data;
1300 }
1301
1302 static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
1303 {
1304         struct ldb_handle *h;
1305         struct ph_context *ac;
1306         struct ldb_message_element *sambaAttr;
1307         struct ldb_message_element *ntAttr;
1308         struct ldb_message_element *lmAttr;
1309         int ret;
1310
1311         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "password_hash_add\n");
1312
1313         if (ldb_dn_is_special(req->op.add.message->dn)) { /* do not manipulate our control entries */
1314                 return ldb_next_request(module, req);
1315         }
1316
1317         /* If the caller is manipulating the local passwords directly, let them pass */
1318         if (ldb_dn_compare_base(ldb_dn_new(req, module->ldb, LOCAL_BASE),
1319                                 req->op.add.message->dn) == 0) {
1320                 return ldb_next_request(module, req);
1321         }
1322
1323         /* nobody must touch this fields */
1324         if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
1325                 return LDB_ERR_UNWILLING_TO_PERFORM;
1326         }
1327         if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
1328                 return LDB_ERR_UNWILLING_TO_PERFORM;
1329         }
1330         if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
1331                 return LDB_ERR_UNWILLING_TO_PERFORM;
1332         }
1333
1334         /* If no part of this ADD touches the userPassword, or the NT
1335          * or LM hashes, then we don't need to make any changes.  */
1336
1337         sambaAttr = ldb_msg_find_element(req->op.mod.message, "userPassword");
1338         ntAttr = ldb_msg_find_element(req->op.mod.message, "unicodePwd");
1339         lmAttr = ldb_msg_find_element(req->op.mod.message, "dBCSPwd");
1340
1341         if ((!sambaAttr) && (!ntAttr) && (!lmAttr)) {
1342                 return ldb_next_request(module, req);
1343         }
1344
1345         /* if it is not an entry of type person its an error */
1346         /* TODO: remove this when userPassword will be in schema */
1347         if (!ldb_msg_check_string_attribute(req->op.add.message, "objectClass", "person")) {
1348                 ldb_set_errstring(module->ldb, "Cannot set a password on entry that does not have objectClass 'person'");
1349                 return LDB_ERR_OBJECT_CLASS_VIOLATION;
1350         }
1351
1352         /* check userPassword is single valued here */
1353         /* TODO: remove this when userPassword will be single valued in schema */
1354         if (sambaAttr && sambaAttr->num_values > 1) {
1355                 ldb_set_errstring(module->ldb, "mupltiple values for userPassword not allowed!\n");
1356                 return LDB_ERR_CONSTRAINT_VIOLATION;
1357         }
1358
1359         if (ntAttr && (ntAttr->num_values > 1)) {
1360                 ldb_set_errstring(module->ldb, "mupltiple values for unicodePwd not allowed!\n");
1361                 return LDB_ERR_CONSTRAINT_VIOLATION;
1362         }
1363         if (lmAttr && (lmAttr->num_values > 1)) {
1364                 ldb_set_errstring(module->ldb, "mupltiple values for dBCSPwd not allowed!\n");
1365                 return LDB_ERR_CONSTRAINT_VIOLATION;
1366         }
1367
1368         if (sambaAttr && sambaAttr->num_values == 0) {
1369                 ldb_set_errstring(module->ldb, "userPassword must have a value!\n");
1370                 return LDB_ERR_CONSTRAINT_VIOLATION;
1371         }
1372
1373         if (ntAttr && (ntAttr->num_values == 0)) {
1374                 ldb_set_errstring(module->ldb, "unicodePwd must have a value!\n");
1375                 return LDB_ERR_CONSTRAINT_VIOLATION;
1376         }
1377         if (lmAttr && (lmAttr->num_values == 0)) {
1378                 ldb_set_errstring(module->ldb, "dBCSPwd must have a value!\n");
1379                 return LDB_ERR_CONSTRAINT_VIOLATION;
1380         }
1381
1382         h = ph_init_handle(req, module, PH_ADD);
1383         if (!h) {
1384                 return LDB_ERR_OPERATIONS_ERROR;
1385         }
1386         ac = talloc_get_type(h->private_data, struct ph_context);
1387
1388         /* get user domain data */
1389         ac->domain_sid = samdb_result_sid_prefix(ac, req->op.add.message, "objectSid");
1390         if (ac->domain_sid == NULL) {
1391                 ldb_debug(module->ldb, LDB_DEBUG_ERROR, "can't handle entry with missing objectSid!\n");
1392                 return LDB_ERR_OPERATIONS_ERROR;
1393         }
1394
1395         ret = build_domain_data_request(ac);
1396         if (ret != LDB_SUCCESS) {
1397                 return ret;
1398         }
1399
1400         ac->step = PH_ADD_SEARCH_DOM;
1401
1402         req->handle = h;
1403
1404         return ldb_next_request(module, ac->dom_req);
1405 }
1406
1407 static int password_hash_add_do_add(struct ldb_handle *h) {
1408
1409         struct ph_context *ac;
1410         struct domain_data *domain;
1411         struct smb_krb5_context *smb_krb5_context;
1412         struct ldb_message *msg;
1413         struct setup_password_fields_io io;
1414         int ret;
1415
1416         ac = talloc_get_type(h->private_data, struct ph_context);
1417
1418         domain = get_domain_data(ac->module, ac, ac->dom_res);
1419         if (domain == NULL) {
1420                 return LDB_ERR_OPERATIONS_ERROR;
1421         }
1422
1423         ac->down_req = talloc(ac, struct ldb_request);
1424         if (ac->down_req == NULL) {
1425                 return LDB_ERR_OPERATIONS_ERROR;
1426         }
1427
1428         *(ac->down_req) = *(ac->orig_req);
1429         ac->down_req->op.add.message = msg = ldb_msg_copy_shallow(ac->down_req, ac->orig_req->op.add.message);
1430         if (ac->down_req->op.add.message == NULL) {
1431                 return LDB_ERR_OPERATIONS_ERROR;
1432         }
1433
1434         /* Some operations below require kerberos contexts */
1435         if (smb_krb5_init_context(ac->down_req,
1436                                   ldb_get_opaque(h->module->ldb, "EventContext"),
1437                                   (struct loadparm_context *)ldb_get_opaque(h->module->ldb, "loadparm"),
1438                                   &smb_krb5_context) != 0) {
1439                 return LDB_ERR_OPERATIONS_ERROR;
1440         }
1441
1442         ZERO_STRUCT(io);
1443         io.ac                           = ac;
1444         io.domain                       = domain;
1445         io.smb_krb5_context             = smb_krb5_context;
1446
1447         io.u.user_account_control       = samdb_result_uint(msg, "userAccountControl", 0);
1448         io.u.sAMAccountName             = samdb_result_string(msg, "samAccountName", NULL);
1449         io.u.user_principal_name        = samdb_result_string(msg, "userPrincipalName", NULL);
1450         io.u.is_computer                = ldb_msg_check_string_attribute(msg, "objectClass", "computer");
1451
1452         io.n.cleartext                  = samdb_result_string(msg, "userPassword", NULL);
1453         io.n.nt_hash                    = samdb_result_hash(io.ac, msg, "unicodePwd");
1454         io.n.lm_hash                    = samdb_result_hash(io.ac, msg, "dBCSPwd");
1455
1456         /* remove attributes */
1457         if (io.n.cleartext) ldb_msg_remove_attr(msg, "userPassword");
1458         if (io.n.nt_hash) ldb_msg_remove_attr(msg, "unicodePwd");
1459         if (io.n.lm_hash) ldb_msg_remove_attr(msg, "dBCSPwd");
1460         ldb_msg_remove_attr(msg, "pwdLastSet");
1461         io.o.kvno = samdb_result_uint(msg, "msDs-KeyVersionNumber", 1) - 1;
1462         ldb_msg_remove_attr(msg, "msDs-KeyVersionNumber");
1463
1464         ret = setup_password_fields(&io);
1465         if (ret != LDB_SUCCESS) {
1466                 return ret;
1467         }
1468
1469         if (io.g.nt_hash) {
1470                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1471                                          "unicodePwd", io.g.nt_hash);
1472                 if (ret != LDB_SUCCESS) {
1473                         return ret;
1474                 }
1475         }
1476         if (io.g.lm_hash) {
1477                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1478                                          "dBCSPwd", io.g.lm_hash);
1479                 if (ret != LDB_SUCCESS) {
1480                         return ret;
1481                 }
1482         }
1483         if (io.g.nt_history_len > 0) {
1484                 ret = samdb_msg_add_hashes(ac, msg,
1485                                            "ntPwdHistory",
1486                                            io.g.nt_history,
1487                                            io.g.nt_history_len);
1488                 if (ret != LDB_SUCCESS) {
1489                         return ret;
1490                 }
1491         }
1492         if (io.g.lm_history_len > 0) {
1493                 ret = samdb_msg_add_hashes(ac, msg,
1494                                            "lmPwdHistory",
1495                                            io.g.lm_history,
1496                                            io.g.lm_history_len);
1497                 if (ret != LDB_SUCCESS) {
1498                         return ret;
1499                 }
1500         }
1501         if (io.g.supplemental.length > 0) {
1502                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
1503                                         &io.g.supplemental, NULL);
1504                 if (ret != LDB_SUCCESS) {
1505                         return ret;
1506                 }
1507         }
1508         ret = samdb_msg_add_uint64(ac->module->ldb, ac, msg,
1509                                    "pwdLastSet",
1510                                    io.g.last_set);
1511         if (ret != LDB_SUCCESS) {
1512                 return ret;
1513         }
1514         ret = samdb_msg_add_uint(ac->module->ldb, ac, msg,
1515                                  "msDs-KeyVersionNumber",
1516                                  io.g.kvno);
1517         if (ret != LDB_SUCCESS) {
1518                 return ret;
1519         }
1520
1521         h->state = LDB_ASYNC_INIT;
1522         h->status = LDB_SUCCESS;
1523
1524         ac->step = PH_ADD_DO_ADD;
1525
1526         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->down_req);
1527
1528         /* perform the operation */
1529         return ldb_next_request(ac->module, ac->down_req);
1530 }
1531
1532 static int password_hash_mod_search_self(struct ldb_handle *h);
1533
1534 static int password_hash_modify(struct ldb_module *module, struct ldb_request *req)
1535 {
1536         struct ldb_handle *h;
1537         struct ph_context *ac;
1538         struct ldb_message_element *sambaAttr;
1539         struct ldb_message_element *ntAttr;
1540         struct ldb_message_element *lmAttr;
1541         struct ldb_message *msg;
1542
1543         ldb_debug(module->ldb, LDB_DEBUG_TRACE, "password_hash_modify\n");
1544
1545         if (ldb_dn_is_special(req->op.mod.message->dn)) { /* do not manipulate our control entries */
1546                 return ldb_next_request(module, req);
1547         }
1548
1549         /* If the caller is manipulating the local passwords directly, let them pass */
1550         if (ldb_dn_compare_base(ldb_dn_new(req, module->ldb, LOCAL_BASE),
1551                                 req->op.mod.message->dn) == 0) {
1552                 return ldb_next_request(module, req);
1553         }
1554
1555         /* nobody must touch password Histories */
1556         if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
1557                 return LDB_ERR_UNWILLING_TO_PERFORM;
1558         }
1559         if (ldb_msg_find_element(req->op.add.message, "lmPwdHistory")) {
1560                 return LDB_ERR_UNWILLING_TO_PERFORM;
1561         }
1562         if (ldb_msg_find_element(req->op.add.message, "supplementalCredentials")) {
1563                 return LDB_ERR_UNWILLING_TO_PERFORM;
1564         }
1565
1566         sambaAttr = ldb_msg_find_element(req->op.mod.message, "userPassword");
1567         ntAttr = ldb_msg_find_element(req->op.mod.message, "unicodePwd");
1568         lmAttr = ldb_msg_find_element(req->op.mod.message, "dBCSPwd");
1569
1570         /* If no part of this touches the userPassword OR unicodePwd and/or dBCSPwd, then we don't
1571          * need to make any changes.  For password changes/set there should
1572          * be a 'delete' or a 'modify' on this attribute. */
1573         if ((!sambaAttr) && (!ntAttr) && (!lmAttr)) {
1574                 return ldb_next_request(module, req);
1575         }
1576
1577         /* check passwords are single valued here */
1578         /* TODO: remove this when passwords will be single valued in schema */
1579         if (sambaAttr && (sambaAttr->num_values > 1)) {
1580                 return LDB_ERR_CONSTRAINT_VIOLATION;
1581         }
1582         if (ntAttr && (ntAttr->num_values > 1)) {
1583                 return LDB_ERR_CONSTRAINT_VIOLATION;
1584         }
1585         if (lmAttr && (lmAttr->num_values > 1)) {
1586                 return LDB_ERR_CONSTRAINT_VIOLATION;
1587         }
1588
1589         h = ph_init_handle(req, module, PH_MOD);
1590         if (!h) {
1591                 return LDB_ERR_OPERATIONS_ERROR;
1592         }
1593         ac = talloc_get_type(h->private_data, struct ph_context);
1594
1595         /* return or own handle to deal with this call */
1596         req->handle = h;
1597
1598         /* prepare the first operation */
1599         ac->down_req = talloc_zero(ac, struct ldb_request);
1600         if (ac->down_req == NULL) {
1601                 ldb_set_errstring(module->ldb, "Out of memory!");
1602                 return LDB_ERR_OPERATIONS_ERROR;
1603         }
1604
1605         *(ac->down_req) = *req; /* copy the request */
1606
1607         /* use a new message structure so that we can modify it */
1608         ac->down_req->op.mod.message = msg = ldb_msg_copy_shallow(ac->down_req, req->op.mod.message);
1609
1610         /* - remove any imodification to the password from the first commit
1611          *   we will make the real modification later */
1612         if (sambaAttr) ldb_msg_remove_attr(msg, "userPassword");
1613         if (ntAttr) ldb_msg_remove_attr(msg, "unicodePwd");
1614         if (lmAttr) ldb_msg_remove_attr(msg, "dBCSPwd");
1615
1616         /* if there was nothing else to be modify skip to next step */
1617         if (msg->num_elements == 0) {
1618                 talloc_free(ac->down_req);
1619                 ac->down_req = NULL;
1620                 return password_hash_mod_search_self(h);
1621         }
1622
1623         ac->down_req->context = NULL;
1624         ac->down_req->callback = NULL;
1625
1626         ac->step = PH_MOD_DO_REQ;
1627
1628         ldb_set_timeout_from_prev_req(module->ldb, req, ac->down_req);
1629
1630         return ldb_next_request(module, ac->down_req);
1631 }
1632
1633 static int get_self_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
1634 {
1635         struct ph_context *ac;
1636
1637         ac = talloc_get_type(context, struct ph_context);
1638
1639         /* we are interested only in the single reply (base search) we receive here */
1640         if (ares->type == LDB_REPLY_ENTRY) {
1641                 if (ac->search_res != NULL) {
1642                         ldb_set_errstring(ldb, "Too many results");
1643                         talloc_free(ares);
1644                         return LDB_ERR_OPERATIONS_ERROR;
1645                 }
1646
1647                 /* if it is not an entry of type person this is an error */
1648                 /* TODO: remove this when userPassword will be in schema */
1649                 if (!ldb_msg_check_string_attribute(ares->message, "objectClass", "person")) {
1650                         ldb_set_errstring(ldb, "Object class violation");
1651                         talloc_free(ares);
1652                         return LDB_ERR_OBJECT_CLASS_VIOLATION;
1653                 }
1654
1655                 ac->search_res = talloc_steal(ac, ares);
1656         } else {
1657                 talloc_free(ares);
1658         }
1659
1660         return LDB_SUCCESS;
1661 }
1662
1663 static int password_hash_mod_search_self(struct ldb_handle *h) {
1664
1665         struct ph_context *ac;
1666         static const char * const attrs[] = { "userAccountControl", "lmPwdHistory",
1667                                               "ntPwdHistory",
1668                                               "objectSid", "msDS-KeyVersionNumber",
1669                                               "objectClass", "userPrincipalName",
1670                                               "sAMAccountName",
1671                                               "dBCSPwd", "unicodePwd",
1672                                               "supplementalCredentials",
1673                                               NULL };
1674
1675         ac = talloc_get_type(h->private_data, struct ph_context);
1676
1677         /* prepare the search operation */
1678         ac->search_req = talloc_zero(ac, struct ldb_request);
1679         if (ac->search_req == NULL) {
1680                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "Out of Memory!\n");
1681                 return LDB_ERR_OPERATIONS_ERROR;
1682         }
1683
1684         ac->search_req->operation = LDB_SEARCH;
1685         ac->search_req->op.search.base = ac->orig_req->op.mod.message->dn;
1686         ac->search_req->op.search.scope = LDB_SCOPE_BASE;
1687         ac->search_req->op.search.tree = ldb_parse_tree(ac->search_req, NULL);
1688         if (ac->search_req->op.search.tree == NULL) {
1689                 ldb_set_errstring(ac->module->ldb, "Invalid search filter");
1690                 return LDB_ERR_OPERATIONS_ERROR;
1691         }
1692         ac->search_req->op.search.attrs = attrs;
1693         ac->search_req->controls = NULL;
1694         ac->search_req->context = ac;
1695         ac->search_req->callback = get_self_callback;
1696         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->search_req);
1697
1698         ac->step = PH_MOD_SEARCH_SELF;
1699
1700         return ldb_next_request(ac->module, ac->search_req);
1701 }
1702
1703 static int password_hash_mod_search_dom(struct ldb_handle *h) {
1704
1705         struct ph_context *ac;
1706         int ret;
1707
1708         ac = talloc_get_type(h->private_data, struct ph_context);
1709
1710         /* get object domain sid */
1711         ac->domain_sid = samdb_result_sid_prefix(ac, ac->search_res->message, "objectSid");
1712         if (ac->domain_sid == NULL) {
1713                 ldb_debug(ac->module->ldb, LDB_DEBUG_ERROR, "can't handle entry with missing objectSid!\n");
1714                 return LDB_ERR_OPERATIONS_ERROR;
1715         }
1716
1717         /* get user domain data */
1718         ret = build_domain_data_request(ac);
1719         if (ret != LDB_SUCCESS) {
1720                 return ret;
1721         }
1722
1723         ac->step = PH_MOD_SEARCH_DOM;
1724
1725         return ldb_next_request(ac->module, ac->dom_req);
1726 }
1727
1728 static int password_hash_mod_do_mod(struct ldb_handle *h) {
1729
1730         struct ph_context *ac;
1731         struct domain_data *domain;
1732         struct smb_krb5_context *smb_krb5_context;
1733         struct ldb_message *msg;
1734         struct ldb_message *orig_msg;
1735         struct ldb_message *searched_msg;
1736         struct setup_password_fields_io io;
1737         int ret;
1738
1739         ac = talloc_get_type(h->private_data, struct ph_context);
1740
1741         domain = get_domain_data(ac->module, ac, ac->dom_res);
1742         if (domain == NULL) {
1743                 return LDB_ERR_OPERATIONS_ERROR;
1744         }
1745
1746         ac->mod_req = talloc(ac, struct ldb_request);
1747         if (ac->mod_req == NULL) {
1748                 return LDB_ERR_OPERATIONS_ERROR;
1749         }
1750
1751         *(ac->mod_req) = *(ac->orig_req);
1752
1753         /* use a new message structure so that we can modify it */
1754         ac->mod_req->op.mod.message = msg = ldb_msg_new(ac->mod_req);
1755         if (msg == NULL) {
1756                 return LDB_ERR_OPERATIONS_ERROR;
1757         }
1758
1759         /* modify dn */
1760         msg->dn = ac->orig_req->op.mod.message->dn;
1761
1762         /* Some operations below require kerberos contexts */
1763         if (smb_krb5_init_context(ac->mod_req,
1764                                   ldb_get_opaque(h->module->ldb, "EventContext"),
1765                                   (struct loadparm_context *)ldb_get_opaque(h->module->ldb, "loadparm"),
1766                                   &smb_krb5_context) != 0) {
1767                 return LDB_ERR_OPERATIONS_ERROR;
1768         }
1769
1770         orig_msg        = discard_const(ac->orig_req->op.mod.message);
1771         searched_msg    = ac->search_res->message;
1772
1773         ZERO_STRUCT(io);
1774         io.ac                           = ac;
1775         io.domain                       = domain;
1776         io.smb_krb5_context             = smb_krb5_context;
1777
1778         io.u.user_account_control       = samdb_result_uint(searched_msg, "userAccountControl", 0);
1779         io.u.sAMAccountName             = samdb_result_string(searched_msg, "samAccountName", NULL);
1780         io.u.user_principal_name        = samdb_result_string(searched_msg, "userPrincipalName", NULL);
1781         io.u.is_computer                = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
1782
1783         io.n.cleartext                  = samdb_result_string(orig_msg, "userPassword", NULL);
1784         io.n.nt_hash                    = samdb_result_hash(io.ac, orig_msg, "unicodePwd");
1785         io.n.lm_hash                    = samdb_result_hash(io.ac, orig_msg, "dBCSPwd");
1786
1787         io.o.kvno                       = samdb_result_uint(searched_msg, "msDs-KeyVersionNumber", 0);
1788         io.o.nt_history_len             = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
1789         io.o.lm_history_len             = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
1790         io.o.supplemental               = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
1791
1792         ret = setup_password_fields(&io);
1793         if (ret != LDB_SUCCESS) {
1794                 return ret;
1795         }
1796
1797         /* make sure we replace all the old attributes */
1798         ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
1799         ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
1800         ret = ldb_msg_add_empty(msg, "ntPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
1801         ret = ldb_msg_add_empty(msg, "lmPwdHistory", LDB_FLAG_MOD_REPLACE, NULL);
1802         ret = ldb_msg_add_empty(msg, "supplementalCredentials", LDB_FLAG_MOD_REPLACE, NULL);
1803         ret = ldb_msg_add_empty(msg, "pwdLastSet", LDB_FLAG_MOD_REPLACE, NULL);
1804         ret = ldb_msg_add_empty(msg, "msDs-KeyVersionNumber", LDB_FLAG_MOD_REPLACE, NULL);
1805
1806         if (io.g.nt_hash) {
1807                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1808                                          "unicodePwd", io.g.nt_hash);
1809                 if (ret != LDB_SUCCESS) {
1810                         return ret;
1811                 }
1812         }
1813         if (io.g.lm_hash) {
1814                 ret = samdb_msg_add_hash(ac->module->ldb, ac, msg,
1815                                          "dBCSPwd", io.g.lm_hash);
1816                 if (ret != LDB_SUCCESS) {
1817                         return ret;
1818                 }
1819         }
1820         if (io.g.nt_history_len > 0) {
1821                 ret = samdb_msg_add_hashes(ac, msg,
1822                                            "ntPwdHistory",
1823                                            io.g.nt_history,
1824                                            io.g.nt_history_len);
1825                 if (ret != LDB_SUCCESS) {
1826                         return ret;
1827                 }
1828         }
1829         if (io.g.lm_history_len > 0) {
1830                 ret = samdb_msg_add_hashes(ac, msg,
1831                                            "lmPwdHistory",
1832                                            io.g.lm_history,
1833                                            io.g.lm_history_len);
1834                 if (ret != LDB_SUCCESS) {
1835                         return ret;
1836                 }
1837         }
1838         if (io.g.supplemental.length > 0) {
1839                 ret = ldb_msg_add_value(msg, "supplementalCredentials",
1840                                         &io.g.supplemental, NULL);
1841                 if (ret != LDB_SUCCESS) {
1842                         return ret;
1843                 }
1844         }
1845         ret = samdb_msg_add_uint64(ac->module->ldb, ac, msg,
1846                                    "pwdLastSet",
1847                                    io.g.last_set);
1848         if (ret != LDB_SUCCESS) {
1849                 return ret;
1850         }
1851         ret = samdb_msg_add_uint(ac->module->ldb, ac, msg,
1852                                  "msDs-KeyVersionNumber",
1853                                  io.g.kvno);
1854         if (ret != LDB_SUCCESS) {
1855                 return ret;
1856         }
1857
1858         h->state = LDB_ASYNC_INIT;
1859         h->status = LDB_SUCCESS;
1860
1861         ac->step = PH_MOD_DO_MOD;
1862
1863         ldb_set_timeout_from_prev_req(ac->module->ldb, ac->orig_req, ac->mod_req);
1864
1865         /* perform the search */
1866         return ldb_next_request(ac->module, ac->mod_req);
1867 }
1868
1869 static int ph_wait(struct ldb_handle *handle) {
1870         struct ph_context *ac;
1871         int ret;
1872
1873         if (!handle || !handle->private_data) {
1874                 return LDB_ERR_OPERATIONS_ERROR;
1875         }
1876
1877         if (handle->state == LDB_ASYNC_DONE) {
1878                 return handle->status;
1879         }
1880
1881         handle->state = LDB_ASYNC_PENDING;
1882         handle->status = LDB_SUCCESS;
1883
1884         ac = talloc_get_type(handle->private_data, struct ph_context);
1885
1886         switch (ac->step) {
1887         case PH_ADD_SEARCH_DOM:
1888                 ret = ldb_wait(ac->dom_req->handle, LDB_WAIT_NONE);
1889
1890                 if (ret != LDB_SUCCESS) {
1891                         handle->status = ret;
1892                         goto done;
1893                 }
1894                 if (ac->dom_req->handle->status != LDB_SUCCESS) {
1895                         handle->status = ac->dom_req->handle->status;
1896                         goto done;
1897                 }
1898
1899                 if (ac->dom_req->handle->state != LDB_ASYNC_DONE) {
1900                         return LDB_SUCCESS;
1901                 }
1902
1903                 /* domain search done, go on */
1904                 return password_hash_add_do_add(handle);
1905
1906         case PH_ADD_DO_ADD:
1907                 ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE);
1908
1909                 if (ret != LDB_SUCCESS) {
1910                         handle->status = ret;
1911                         goto done;
1912                 }
1913                 if (ac->down_req->handle->status != LDB_SUCCESS) {
1914                         handle->status = ac->down_req->handle->status;
1915                         goto done;
1916                 }
1917
1918                 if (ac->down_req->handle->state != LDB_ASYNC_DONE) {
1919                         return LDB_SUCCESS;
1920                 }
1921
1922                 break;
1923
1924         case PH_MOD_DO_REQ:
1925                 ret = ldb_wait(ac->down_req->handle, LDB_WAIT_NONE);
1926
1927                 if (ret != LDB_SUCCESS) {
1928                         handle->status = ret;
1929                         goto done;
1930                 }
1931                 if (ac->down_req->handle->status != LDB_SUCCESS) {
1932                         handle->status = ac->down_req->handle->status;
1933                         goto done;
1934                 }
1935
1936                 if (ac->down_req->handle->state != LDB_ASYNC_DONE) {
1937                         return LDB_SUCCESS;
1938                 }
1939
1940                 /* non-password mods done, go on */
1941                 return password_hash_mod_search_self(handle);
1942
1943         case PH_MOD_SEARCH_SELF:
1944                 ret = ldb_wait(ac->search_req->handle, LDB_WAIT_NONE);
1945
1946                 if (ret != LDB_SUCCESS) {
1947                         handle->status = ret;
1948                         goto done;
1949                 }
1950                 if (ac->search_req->handle->status != LDB_SUCCESS) {
1951                         handle->status = ac->search_req->handle->status;
1952                         goto done;
1953                 }
1954
1955                 if (ac->search_req->handle->state != LDB_ASYNC_DONE) {
1956                         return LDB_SUCCESS;
1957                 }
1958
1959                 if (ac->search_res == NULL) {
1960                         return LDB_ERR_NO_SUCH_OBJECT;
1961                 }
1962
1963                 /* self search done, go on */
1964                 return password_hash_mod_search_dom(handle);
1965
1966         case PH_MOD_SEARCH_DOM:
1967                 ret = ldb_wait(ac->dom_req->handle, LDB_WAIT_NONE);
1968
1969                 if (ret != LDB_SUCCESS) {
1970                         handle->status = ret;
1971                         goto done;
1972                 }
1973                 if (ac->dom_req->handle->status != LDB_SUCCESS) {
1974                         handle->status = ac->dom_req->handle->status;
1975                         goto done;
1976                 }
1977
1978                 if (ac->dom_req->handle->state != LDB_ASYNC_DONE) {
1979                         return LDB_SUCCESS;
1980                 }
1981
1982                 /* domain search done, go on */
1983                 return password_hash_mod_do_mod(handle);
1984
1985         case PH_MOD_DO_MOD:
1986                 ret = ldb_wait(ac->mod_req->handle, LDB_WAIT_NONE);
1987
1988                 if (ret != LDB_SUCCESS) {
1989                         handle->status = ret;
1990                         goto done;
1991                 }
1992                 if (ac->mod_req->handle->status != LDB_SUCCESS) {
1993                         handle->status = ac->mod_req->handle->status;
1994                         goto done;
1995                 }
1996
1997                 if (ac->mod_req->handle->state != LDB_ASYNC_DONE) {
1998                         return LDB_SUCCESS;
1999                 }
2000
2001                 break;
2002
2003         default:
2004                 ret = LDB_ERR_OPERATIONS_ERROR;
2005                 goto done;
2006         }
2007
2008         ret = LDB_SUCCESS;
2009
2010 done:
2011         handle->state = LDB_ASYNC_DONE;
2012         return ret;
2013 }
2014
2015 static int ph_wait_all(struct ldb_handle *handle) {
2016
2017         int ret;
2018
2019         while (handle->state != LDB_ASYNC_DONE) {
2020                 ret = ph_wait(handle);
2021                 if (ret != LDB_SUCCESS) {
2022                         return ret;
2023                 }
2024         }
2025
2026         return handle->status;
2027 }
2028
2029 static int password_hash_wait(struct ldb_handle *handle, enum ldb_wait_type type)
2030 {
2031         if (type == LDB_WAIT_ALL) {
2032                 return ph_wait_all(handle);
2033         } else {
2034                 return ph_wait(handle);
2035         }
2036 }
2037
2038 _PUBLIC_ const struct ldb_module_ops ldb_password_hash_module_ops = {
2039         .name          = "password_hash",
2040         .add           = password_hash_add,
2041         .modify        = password_hash_modify,
2042         .wait          = password_hash_wait
2043 };