auth/auth_sam_reply.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Convert a server info struct into the form for PAC and NETLOGON replies
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2011
   7    Copyright (C) Stefan Metzmacher <metze@samba.org>  2005
   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 #include "includes.h"
  24 #include "librpc/gen_ndr/auth.h"
  25 #include "libcli/security/security.h"
  26 #include "auth/auth_sam_reply.h"
  27
  28 NTSTATUS auth_convert_user_info_dc_sambaseinfo(TALLOC_CTX *mem_ctx,
  29                                               const struct auth_user_info_dc *user_info_dc,
  30                                               struct netr_SamBaseInfo **_sam)
  31 {
  32         NTSTATUS status;
  33         struct auth_user_info *info;
  34         struct netr_SamBaseInfo *sam = talloc_zero(mem_ctx, struct netr_SamBaseInfo);
  35         NT_STATUS_HAVE_NO_MEMORY(sam);
  36
  37         if (user_info_dc->num_sids > PRIMARY_USER_SID_INDEX) {
  38                 status = dom_sid_split_rid(sam, &user_info_dc->sids[PRIMARY_USER_SID_INDEX],
  39                                            &sam->domain_sid, &sam->rid);
  40                 if (!NT_STATUS_IS_OK(status)) {
  41                         return status;
  42                 }
  43         } else {
  44                 return NT_STATUS_INVALID_PARAMETER;
  45         }
  46
  47         if (user_info_dc->num_sids > PRIMARY_GROUP_SID_INDEX) {
  48                 status = dom_sid_split_rid(NULL, &user_info_dc->sids[PRIMARY_GROUP_SID_INDEX],
  49                                            NULL, &sam->primary_gid);
  50                 if (!NT_STATUS_IS_OK(status)) {
  51                         return status;
  52                 }
  53         } else {
  54                 /* if we have to encode something like SYSTEM (with no
  55                  * second SID in the token) then this is the only
  56                  * choice */
  57                 sam->primary_gid = sam->rid;
  58         }
  59
  60         info = user_info_dc->info;
  61
  62         sam->logon_time = info->last_logon;
  63         sam->logoff_time =  info->last_logoff;
  64         sam->kickoff_time = info->acct_expiry;
  65         sam->last_password_change = info->last_password_change;
  66         sam->allow_password_change = info->allow_password_change;
  67         sam->force_password_change = info->force_password_change;
  68
  69         sam->account_name.string = info->account_name;
  70         sam->full_name.string = info->full_name;
  71         sam->logon_script.string = info->logon_script;
  72         sam->profile_path.string = info->profile_path;
  73         sam->home_directory.string = info->home_directory;
  74         sam->home_drive.string = info->home_drive;
  75
  76         sam->logon_count = info->logon_count;
  77         sam->bad_password_count = info->bad_password_count;
  78         sam->groups.count = 0;
  79         sam->groups.rids = NULL;
  80
  81         if (user_info_dc->num_sids > 2) {
  82                 size_t i;
  83                 sam->groups.rids = talloc_array(sam, struct samr_RidWithAttribute,
  84                                                 user_info_dc->num_sids);
  85
  86                 if (sam->groups.rids == NULL)
  87                         return NT_STATUS_NO_MEMORY;
  88
  89                 for (i=2; i<user_info_dc->num_sids; i++) {
  90                         struct dom_sid *group_sid = &user_info_dc->sids[i];
  91                         if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
  92                                 /* We handle this elsewhere */
  93                                 continue;
  94                         }
  95                         sam->groups.rids[sam->groups.count].rid =
  96                                 group_sid->sub_auths[group_sid->num_auths-1];
  97
  98                         sam->groups.rids[sam->groups.count].attributes =
  99                                 SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 100                         sam->groups.count += 1;
 101                 }
 102         }
 103
 104         sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
 105         if (!user_info_dc->info->authenticated) {
 106                 sam->user_flags |= NETLOGON_GUEST;
 107         }
 108         sam->acct_flags = user_info_dc->info->acct_flags;
 109         sam->logon_server.string = user_info_dc->info->logon_server;
 110         sam->logon_domain.string = user_info_dc->info->domain_name;
 111         sam->sub_auth_status = 0;
 112         sam->last_successful_logon = 0;
 113         sam->last_failed_logon = 0;
 114         sam->failed_logon_count = 0;
 115         sam->reserved = 0;
 116
 117         ZERO_STRUCT(sam->key);
 118         if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
 119                 memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
 120         }
 121
 122         ZERO_STRUCT(sam->LMSessKey);
 123         if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
 124                 memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
 125                        sizeof(sam->LMSessKey.key));
 126         }
 127
 128         *_sam = sam;
 129
 130         return NT_STATUS_OK;
 131 }
 132
 133 /* Note that the validity of the _sam6 structure is only as long as
 134  * the user_info_dc it was generated from */
 135 NTSTATUS auth_convert_user_info_dc_saminfo6(TALLOC_CTX *mem_ctx,
 136                                             const struct auth_user_info_dc *user_info_dc,
 137                                             struct netr_SamInfo6 **_sam6)
 138 {
 139         NTSTATUS status;
 140         struct netr_SamBaseInfo *sam = NULL;
 141         struct netr_SamInfo6 *sam6 = NULL;
 142         size_t i;
 143
 144         sam6 = talloc_zero(mem_ctx, struct netr_SamInfo6);
 145         if (sam6 == NULL) {
 146                 return NT_STATUS_NO_MEMORY;
 147         }
 148
 149         status = auth_convert_user_info_dc_sambaseinfo(sam6, user_info_dc, &sam);
 150         if (!NT_STATUS_IS_OK(status)) {
 151                 TALLOC_FREE(sam6);
 152                 return status;
 153         }
 154         sam6->base = *sam;
 155
 156         sam6->sids = talloc_array(sam6, struct netr_SidAttr,
 157                                   user_info_dc->num_sids);
 158         if (sam6->sids == NULL) {
 159                 TALLOC_FREE(sam6);
 160                 return NT_STATUS_NO_MEMORY;
 161         }
 162
 163         /* We don't put the user and group SIDs in there */
 164         for (i=2; i<user_info_dc->num_sids; i++) {
 165                 if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
 166                         continue;
 167                 }
 168                 sam6->sids[sam6->sidcount].sid = dom_sid_dup(sam6->sids, &user_info_dc->sids[i]);
 169                 if (sam6->sids[sam6->sidcount].sid == NULL) {
 170                         TALLOC_FREE(sam6);
 171                         return NT_STATUS_NO_MEMORY;
 172                 }
 173                 sam6->sids[sam6->sidcount].attributes =
 174                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 175                 sam6->sidcount += 1;
 176         }
 177         if (sam6->sidcount) {
 178                 sam6->base.user_flags |= NETLOGON_EXTRA_SIDS;
 179         } else {
 180                 sam6->sids = NULL;
 181         }
 182
 183         if (user_info_dc->info->dns_domain_name != NULL) {
 184                 sam6->dns_domainname.string = talloc_strdup(sam6,
 185                                         user_info_dc->info->dns_domain_name);
 186                 if (sam6->dns_domainname.string == NULL) {
 187                         TALLOC_FREE(sam6);
 188                         return NT_STATUS_NO_MEMORY;
 189                 }
 190         }
 191
 192         if (user_info_dc->info->user_principal_name != NULL) {
 193                 sam6->principal_name.string = talloc_strdup(sam6,
 194                                         user_info_dc->info->user_principal_name);
 195                 if (sam6->principal_name.string == NULL) {
 196                         TALLOC_FREE(sam6);
 197                         return NT_STATUS_NO_MEMORY;
 198                 }
 199         }
 200
 201         *_sam6 = sam6;
 202         return NT_STATUS_OK;
 203 }
 204
 205 /* Note that the validity of the _sam3 structure is only as long as
 206  * the user_info_dc it was generated from */
 207 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
 208                                            const struct auth_user_info_dc *user_info_dc,
 209                                            struct netr_SamInfo3 **_sam3)
 210 {
 211         NTSTATUS status;
 212         struct netr_SamInfo6 *sam6 = NULL;
 213         struct netr_SamInfo3 *sam3 = NULL;
 214
 215         sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 216         if (sam3 == NULL) {
 217                 return NT_STATUS_NO_MEMORY;
 218         }
 219
 220         status = auth_convert_user_info_dc_saminfo6(sam3, user_info_dc, &sam6);
 221         if (!NT_STATUS_IS_OK(status)) {
 222                 TALLOC_FREE(sam3);
 223                 return status;
 224         }
 225         sam3->base      = sam6->base;
 226         sam3->sidcount  = sam6->sidcount;
 227         sam3->sids      = sam6->sids;
 228
 229         *_sam3 = sam3;
 230         return NT_STATUS_OK;
 231 }
 232
 233 /**
 234  * Make a user_info struct from the info3 or similar returned by a domain logon.
 235  *
 236  * The netr_SamInfo3 is also a key structure in the source3 auth subsystem
 237  */
 238
 239 NTSTATUS make_user_info_SamBaseInfo(TALLOC_CTX *mem_ctx,
 240                                     const char *account_name,
 241                                     const struct netr_SamBaseInfo *base,
 242                                     bool authenticated,
 243                                     struct auth_user_info **_user_info)
 244 {
 245         struct auth_user_info *info;
 246
 247         info = talloc_zero(mem_ctx, struct auth_user_info);
 248         NT_STATUS_HAVE_NO_MEMORY(info);
 249
 250         if (base->account_name.string) {
 251                 info->account_name = talloc_strdup(info, base->account_name.string);
 252         } else {
 253                 info->account_name = talloc_strdup(info, account_name);
 254         }
 255         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 256
 257         if (base->logon_domain.string) {
 258                 info->domain_name = talloc_strdup(info, base->logon_domain.string);
 259                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 260         }
 261
 262         if (base->full_name.string) {
 263                 info->full_name = talloc_strdup(info, base->full_name.string);
 264                 NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 265         }
 266         if (base->logon_script.string) {
 267                 info->logon_script = talloc_strdup(info, base->logon_script.string);
 268                 NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 269         }
 270         if (base->profile_path.string) {
 271                 info->profile_path = talloc_strdup(info, base->profile_path.string);
 272                 NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 273         }
 274         if (base->home_directory.string) {
 275                 info->home_directory = talloc_strdup(info, base->home_directory.string);
 276                 NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 277         }
 278         if (base->home_drive.string) {
 279                 info->home_drive = talloc_strdup(info, base->home_drive.string);
 280                 NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 281         }
 282         if (base->logon_server.string) {
 283                 info->logon_server = talloc_strdup(info, base->logon_server.string);
 284                 NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 285         }
 286         info->last_logon = base->logon_time;
 287         info->last_logoff = base->logoff_time;
 288         info->acct_expiry = base->kickoff_time;
 289         info->last_password_change = base->last_password_change;
 290         info->allow_password_change = base->allow_password_change;
 291         info->force_password_change = base->force_password_change;
 292         info->logon_count = base->logon_count;
 293         info->bad_password_count = base->bad_password_count;
 294         info->acct_flags = base->acct_flags;
 295
 296         /* Only set authenticated if both NETLOGON_GUEST is not set, and authenticated is set */
 297         info->authenticated = (authenticated && (!(base->user_flags & NETLOGON_GUEST)));
 298
 299         *_user_info = info;
 300         return NT_STATUS_OK;
 301 }
 302
 303 /**
 304  * Make a user_info_dc struct from the info3 returned by a domain logon
 305  */
 306 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 307                                               const char *account_name,
 308                                               uint16_t validation_level,
 309                                               const union netr_Validation *validation,
 310                                                bool authenticated,
 311                                               struct auth_user_info_dc **_user_info_dc)
 312 {
 313         NTSTATUS status;
 314         struct auth_user_info_dc *user_info_dc = NULL;
 315         const struct netr_SamBaseInfo *base = NULL;
 316         uint32_t sidcount = 0;
 317         const struct netr_SidAttr *sids = NULL;
 318         const char *dns_domainname = NULL;
 319         const char *principal = NULL;
 320         uint32_t i;
 321
 322         switch (validation_level) {
 323         case 2:
 324                 if (!validation || !validation->sam2) {
 325                         return NT_STATUS_INVALID_PARAMETER;
 326                 }
 327                 base = &validation->sam2->base;
 328                 break;
 329         case 3:
 330                 if (!validation || !validation->sam3) {
 331                         return NT_STATUS_INVALID_PARAMETER;
 332                 }
 333                 base = &validation->sam3->base;
 334                 sidcount = validation->sam3->sidcount;
 335                 sids = validation->sam3->sids;
 336                 break;
 337         case 6:
 338                 if (!validation || !validation->sam6) {
 339                         return NT_STATUS_INVALID_PARAMETER;
 340                 }
 341                 base = &validation->sam6->base;
 342                 sidcount = validation->sam6->sidcount;
 343                 sids = validation->sam6->sids;
 344                 dns_domainname = validation->sam6->dns_domainname.string;
 345                 principal = validation->sam6->principal_name.string;
 346                 break;
 347         default:
 348                 return NT_STATUS_INVALID_LEVEL;
 349         }
 350
 351         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 352         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 353
 354         /*
 355            Here is where we should check the list of
 356            trusted domains, and verify that the SID
 357            matches.
 358         */
 359         if (!base->domain_sid) {
 360                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 361                 return NT_STATUS_INVALID_PARAMETER;
 362         }
 363
 364         /* The IDL layer would be a better place to check this, but to
 365          * guard the integer addition below, we double-check */
 366         if (base->groups.count > 65535) {
 367                 return NT_STATUS_INVALID_PARAMETER;
 368         }
 369
 370         user_info_dc->num_sids = 2;
 371
 372         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 373         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 374
 375         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 376         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 377                 return NT_STATUS_INVALID_PARAMETER;
 378         }
 379
 380         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 381         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 382                 return NT_STATUS_INVALID_PARAMETER;
 383         }
 384
 385         for (i = 0; i < base->groups.count; i++) {
 386                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 387                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 388                         return NT_STATUS_INVALID_PARAMETER;
 389                 }
 390                 user_info_dc->num_sids++;
 391         }
 392
 393         /* Copy 'other' sids.  We need to do sid filtering here to
 394            prevent possible elevation of privileges.  See:
 395
 396            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 397          */
 398
 399         /*
 400          * The IDL layer would be a better place to check this, but to
 401          * guard the integer addition below, we double-check
 402          */
 403         if (sidcount > UINT16_MAX) {
 404                 return NT_STATUS_INVALID_PARAMETER;
 405         }
 406
 407         if (sidcount > 0) {
 408                 struct dom_sid *dgrps = user_info_dc->sids;
 409                 size_t dgrps_count;
 410
 411                 dgrps_count = user_info_dc->num_sids + sidcount;
 412                 dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid,
 413                                        dgrps_count);
 414                 if (dgrps == NULL) {
 415                         return NT_STATUS_NO_MEMORY;
 416                 }
 417
 418                 for (i = 0; i < sidcount; i++) {
 419                         if (sids[i].sid) {
 420                                 dgrps[user_info_dc->num_sids] = *sids[i].sid;
 421                                 user_info_dc->num_sids++;
 422                         }
 423                 }
 424
 425                 user_info_dc->sids = dgrps;
 426
 427                 /* Where are the 'global' sids?... */
 428         }
 429
 430         status = make_user_info_SamBaseInfo(user_info_dc, account_name, base, authenticated, &user_info_dc->info);
 431         if (!NT_STATUS_IS_OK(status)) {
 432                 return status;
 433         }
 434
 435         if (dns_domainname != NULL) {
 436                 user_info_dc->info->dns_domain_name = talloc_strdup(user_info_dc->info,
 437                                                                     dns_domainname);
 438                 if (user_info_dc->info->dns_domain_name == NULL) {
 439                         return NT_STATUS_NO_MEMORY;
 440                 }
 441         }
 442
 443         if (principal != NULL) {
 444                 user_info_dc->info->user_principal_name = talloc_strdup(user_info_dc->info,
 445                                                                         principal);
 446                 if (user_info_dc->info->user_principal_name == NULL) {
 447                         return NT_STATUS_NO_MEMORY;
 448                 }
 449         }
 450
 451         /* ensure we are never given NULL session keys */
 452
 453         if (all_zero(base->key.key, sizeof(base->key.key))) {
 454                 user_info_dc->user_session_key = data_blob(NULL, 0);
 455         } else {
 456                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 457                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 458         }
 459
 460         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 461                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 462         } else {
 463                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 464                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 465         }
 466
 467         *_user_info_dc = user_info_dc;
 468         return NT_STATUS_OK;
 469 }
 470
 471 /**
 472  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 473  */
 474 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 475                               const struct PAC_LOGON_INFO *pac_logon_info,
 476                               struct auth_user_info_dc **_user_info_dc)
 477 {
 478         uint32_t i;
 479         NTSTATUS nt_status;
 480         union netr_Validation validation;
 481         struct auth_user_info_dc *user_info_dc;
 482
 483         validation.sam3 = discard_const_p(struct netr_SamInfo3, &pac_logon_info->info3);
 484
 485         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation,
 486                                                           true, /* This user was authenticated */
 487                                                           &user_info_dc);
 488         if (!NT_STATUS_IS_OK(nt_status)) {
 489                 return nt_status;
 490         }
 491
 492         if (pac_logon_info->res_groups.count > 0) {
 493                 size_t sidcount;
 494                 /* The IDL layer would be a better place to check this, but to
 495                  * guard the integer addition below, we double-check */
 496                 if (pac_logon_info->res_groups.count > 65535) {
 497                         talloc_free(user_info_dc);
 498                         return NT_STATUS_INVALID_PARAMETER;
 499                 }
 500
 501                 /*
 502                   Here is where we should check the list of
 503                   trusted domains, and verify that the SID
 504                   matches.
 505                 */
 506                 if (!pac_logon_info->res_group_dom_sid) {
 507                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 508                         return NT_STATUS_INVALID_PARAMETER;
 509                 }
 510
 511                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
 512                 user_info_dc->sids
 513                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 514                 if (user_info_dc->sids == NULL) {
 515                         TALLOC_FREE(user_info_dc);
 516                         return NT_STATUS_NO_MEMORY;
 517                 }
 518
 519                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 520                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
 521                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 522                                             pac_logon_info->res_groups.rids[i].rid)) {
 523                                 return NT_STATUS_INVALID_PARAMETER;
 524                         }
 525                         user_info_dc->num_sids++;
 526                 }
 527         }
 528         *_user_info_dc = user_info_dc;
 529         return NT_STATUS_OK;
 530 }