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 static 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         const struct auth_user_info *info;
  34
  35         ZERO_STRUCTP(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 #define _COPY_STRING_TALLOC(src_name, dst_name) do { \
  70         if (info->src_name != NULL) {\
  71                 sam->dst_name.string = talloc_strdup(mem_ctx, info->src_name); \
  72                 if (sam->dst_name.string == NULL) { \
  73                         return NT_STATUS_NO_MEMORY; \
  74                 } \
  75         } \
  76 } while(0)
  77         _COPY_STRING_TALLOC(account_name, account_name);
  78         _COPY_STRING_TALLOC(full_name, full_name);
  79         _COPY_STRING_TALLOC(logon_script, logon_script);
  80         _COPY_STRING_TALLOC(profile_path, profile_path);
  81         _COPY_STRING_TALLOC(home_directory, home_directory);
  82         _COPY_STRING_TALLOC(home_drive, home_drive);
  83         _COPY_STRING_TALLOC(logon_server, logon_server);
  84         _COPY_STRING_TALLOC(domain_name, logon_domain);
  85 #undef _COPY_STRING_TALLOC
  86
  87         sam->logon_count = info->logon_count;
  88         sam->bad_password_count = info->bad_password_count;
  89         sam->groups.count = 0;
  90         sam->groups.rids = NULL;
  91
  92         if (user_info_dc->num_sids > 2) {
  93                 size_t i;
  94                 sam->groups.rids = talloc_array(mem_ctx, struct samr_RidWithAttribute,
  95                                                 user_info_dc->num_sids);
  96
  97                 if (sam->groups.rids == NULL)
  98                         return NT_STATUS_NO_MEMORY;
  99
 100                 for (i=2; i<user_info_dc->num_sids; i++) {
 101                         struct dom_sid *group_sid = &user_info_dc->sids[i];
 102                         if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
 103                                 /* We handle this elsewhere */
 104                                 continue;
 105                         }
 106                         sam->groups.rids[sam->groups.count].rid =
 107                                 group_sid->sub_auths[group_sid->num_auths-1];
 108
 109                         sam->groups.rids[sam->groups.count].attributes =
 110                                 SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 111                         sam->groups.count += 1;
 112                 }
 113         }
 114
 115         sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
 116         if (!user_info_dc->info->authenticated) {
 117                 sam->user_flags |= NETLOGON_GUEST;
 118         }
 119         sam->acct_flags = user_info_dc->info->acct_flags;
 120         sam->sub_auth_status = 0;
 121         sam->last_successful_logon = 0;
 122         sam->last_failed_logon = 0;
 123         sam->failed_logon_count = 0;
 124         sam->reserved = 0;
 125
 126         ZERO_STRUCT(sam->key);
 127         if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
 128                 memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
 129         }
 130
 131         ZERO_STRUCT(sam->LMSessKey);
 132         if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
 133                 memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
 134                        sizeof(sam->LMSessKey.key));
 135         }
 136
 137         return NT_STATUS_OK;
 138 }
 139
 140 /* Note that the validity of the _sam6 structure is only as long as
 141  * the user_info_dc it was generated from */
 142 NTSTATUS auth_convert_user_info_dc_saminfo6(TALLOC_CTX *mem_ctx,
 143                                             const struct auth_user_info_dc *user_info_dc,
 144                                             struct netr_SamInfo6 **_sam6)
 145 {
 146         NTSTATUS status;
 147         struct netr_SamInfo6 *sam6 = NULL;
 148         size_t i;
 149
 150         sam6 = talloc_zero(mem_ctx, struct netr_SamInfo6);
 151         if (sam6 == NULL) {
 152                 return NT_STATUS_NO_MEMORY;
 153         }
 154
 155         status = auth_convert_user_info_dc_sambaseinfo(sam6,
 156                                                        user_info_dc,
 157                                                        &sam6->base);
 158         if (!NT_STATUS_IS_OK(status)) {
 159                 TALLOC_FREE(sam6);
 160                 return status;
 161         }
 162
 163         sam6->sids = talloc_array(sam6, struct netr_SidAttr,
 164                                   user_info_dc->num_sids);
 165         if (sam6->sids == NULL) {
 166                 TALLOC_FREE(sam6);
 167                 return NT_STATUS_NO_MEMORY;
 168         }
 169
 170         /* We don't put the user and group SIDs in there */
 171         for (i=2; i<user_info_dc->num_sids; i++) {
 172                 if (dom_sid_in_domain(sam6->base.domain_sid, &user_info_dc->sids[i])) {
 173                         continue;
 174                 }
 175                 sam6->sids[sam6->sidcount].sid = dom_sid_dup(sam6->sids, &user_info_dc->sids[i]);
 176                 if (sam6->sids[sam6->sidcount].sid == NULL) {
 177                         TALLOC_FREE(sam6);
 178                         return NT_STATUS_NO_MEMORY;
 179                 }
 180                 sam6->sids[sam6->sidcount].attributes =
 181                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 182                 sam6->sidcount += 1;
 183         }
 184         if (sam6->sidcount) {
 185                 sam6->base.user_flags |= NETLOGON_EXTRA_SIDS;
 186         } else {
 187                 sam6->sids = NULL;
 188         }
 189
 190         if (user_info_dc->info->dns_domain_name != NULL) {
 191                 sam6->dns_domainname.string = talloc_strdup(sam6,
 192                                         user_info_dc->info->dns_domain_name);
 193                 if (sam6->dns_domainname.string == NULL) {
 194                         TALLOC_FREE(sam6);
 195                         return NT_STATUS_NO_MEMORY;
 196                 }
 197         }
 198
 199         if (user_info_dc->info->user_principal_name != NULL) {
 200                 sam6->principal_name.string = talloc_strdup(sam6,
 201                                         user_info_dc->info->user_principal_name);
 202                 if (sam6->principal_name.string == NULL) {
 203                         TALLOC_FREE(sam6);
 204                         return NT_STATUS_NO_MEMORY;
 205                 }
 206         }
 207
 208         *_sam6 = sam6;
 209         return NT_STATUS_OK;
 210 }
 211
 212 /* Note that the validity of the _sam2 structure is only as long as
 213  * the user_info_dc it was generated from */
 214 NTSTATUS auth_convert_user_info_dc_saminfo2(TALLOC_CTX *mem_ctx,
 215                                            const struct auth_user_info_dc *user_info_dc,
 216                                            struct netr_SamInfo2 **_sam2)
 217 {
 218         NTSTATUS status;
 219         struct netr_SamInfo6 *sam6 = NULL;
 220         struct netr_SamInfo2 *sam2 = NULL;
 221
 222         sam2 = talloc_zero(mem_ctx, struct netr_SamInfo2);
 223         if (sam2 == NULL) {
 224                 return NT_STATUS_NO_MEMORY;
 225         }
 226
 227         status = auth_convert_user_info_dc_saminfo6(sam2, user_info_dc, &sam6);
 228         if (!NT_STATUS_IS_OK(status)) {
 229                 TALLOC_FREE(sam2);
 230                 return status;
 231         }
 232         sam2->base      = sam6->base;
 233
 234         *_sam2 = sam2;
 235         return NT_STATUS_OK;
 236 }
 237
 238 /* Note that the validity of the _sam3 structure is only as long as
 239  * the user_info_dc it was generated from */
 240 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
 241                                            const struct auth_user_info_dc *user_info_dc,
 242                                            struct netr_SamInfo3 **_sam3)
 243 {
 244         NTSTATUS status;
 245         struct netr_SamInfo6 *sam6 = NULL;
 246         struct netr_SamInfo3 *sam3 = NULL;
 247
 248         sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 249         if (sam3 == NULL) {
 250                 return NT_STATUS_NO_MEMORY;
 251         }
 252
 253         status = auth_convert_user_info_dc_saminfo6(sam3, user_info_dc, &sam6);
 254         if (!NT_STATUS_IS_OK(status)) {
 255                 TALLOC_FREE(sam3);
 256                 return status;
 257         }
 258         sam3->base      = sam6->base;
 259         sam3->sidcount  = sam6->sidcount;
 260         sam3->sids      = sam6->sids;
 261
 262         *_sam3 = sam3;
 263         return NT_STATUS_OK;
 264 }
 265
 266 /**
 267  * Make a user_info struct from the info3 or similar returned by a domain logon.
 268  *
 269  * The netr_SamInfo3 is also a key structure in the source3 auth subsystem
 270  */
 271
 272 NTSTATUS make_user_info_SamBaseInfo(TALLOC_CTX *mem_ctx,
 273                                     const char *account_name,
 274                                     const struct netr_SamBaseInfo *base,
 275                                     bool authenticated,
 276                                     struct auth_user_info **_user_info)
 277 {
 278         struct auth_user_info *info;
 279
 280         info = talloc_zero(mem_ctx, struct auth_user_info);
 281         NT_STATUS_HAVE_NO_MEMORY(info);
 282
 283         if (base->account_name.string) {
 284                 info->account_name = talloc_strdup(info, base->account_name.string);
 285         } else {
 286                 info->account_name = talloc_strdup(info, account_name);
 287         }
 288         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 289
 290         if (base->logon_domain.string) {
 291                 info->domain_name = talloc_strdup(info, base->logon_domain.string);
 292                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 293         }
 294
 295         if (base->full_name.string) {
 296                 info->full_name = talloc_strdup(info, base->full_name.string);
 297                 NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 298         }
 299         if (base->logon_script.string) {
 300                 info->logon_script = talloc_strdup(info, base->logon_script.string);
 301                 NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 302         }
 303         if (base->profile_path.string) {
 304                 info->profile_path = talloc_strdup(info, base->profile_path.string);
 305                 NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 306         }
 307         if (base->home_directory.string) {
 308                 info->home_directory = talloc_strdup(info, base->home_directory.string);
 309                 NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 310         }
 311         if (base->home_drive.string) {
 312                 info->home_drive = talloc_strdup(info, base->home_drive.string);
 313                 NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 314         }
 315         if (base->logon_server.string) {
 316                 info->logon_server = talloc_strdup(info, base->logon_server.string);
 317                 NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 318         }
 319         info->last_logon = base->logon_time;
 320         info->last_logoff = base->logoff_time;
 321         info->acct_expiry = base->kickoff_time;
 322         info->last_password_change = base->last_password_change;
 323         info->allow_password_change = base->allow_password_change;
 324         info->force_password_change = base->force_password_change;
 325         info->logon_count = base->logon_count;
 326         info->bad_password_count = base->bad_password_count;
 327         info->acct_flags = base->acct_flags;
 328
 329         /* Only set authenticated if both NETLOGON_GUEST is not set, and authenticated is set */
 330         info->authenticated = (authenticated && (!(base->user_flags & NETLOGON_GUEST)));
 331
 332         *_user_info = info;
 333         return NT_STATUS_OK;
 334 }
 335
 336 struct auth_user_info *auth_user_info_copy(TALLOC_CTX *mem_ctx,
 337                                            const struct auth_user_info *src)
 338 {
 339         struct auth_user_info *dst = NULL;
 340
 341         dst = talloc_zero(mem_ctx, struct auth_user_info);
 342         if (dst == NULL) {
 343                 return NULL;
 344         }
 345
 346         *dst = *src;
 347 #define _COPY_STRING(_mem, _str) do { \
 348         if ((_str) != NULL) { \
 349                 (_str) = talloc_strdup((_mem), (_str)); \
 350                 if ((_str) == NULL) { \
 351                         TALLOC_FREE(dst); \
 352                         return NULL; \
 353                 } \
 354         } \
 355 } while(0)
 356         _COPY_STRING(dst, dst->account_name);
 357         _COPY_STRING(dst, dst->user_principal_name);
 358         _COPY_STRING(dst, dst->domain_name);
 359         _COPY_STRING(dst, dst->dns_domain_name);
 360         _COPY_STRING(dst, dst->full_name);
 361         _COPY_STRING(dst, dst->logon_script);
 362         _COPY_STRING(dst, dst->profile_path);
 363         _COPY_STRING(dst, dst->home_directory);
 364         _COPY_STRING(dst, dst->home_drive);
 365         _COPY_STRING(dst, dst->logon_server);
 366 #undef _COPY_STRING
 367
 368         return dst;
 369 }
 370
 371 /**
 372  * Make a user_info_dc struct from the info3 returned by a domain logon
 373  */
 374 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 375                                               const char *account_name,
 376                                               uint16_t validation_level,
 377                                               const union netr_Validation *validation,
 378                                                bool authenticated,
 379                                               struct auth_user_info_dc **_user_info_dc)
 380 {
 381         NTSTATUS status;
 382         struct auth_user_info_dc *user_info_dc = NULL;
 383         const struct netr_SamBaseInfo *base = NULL;
 384         uint32_t sidcount = 0;
 385         const struct netr_SidAttr *sids = NULL;
 386         const char *dns_domainname = NULL;
 387         const char *principal = NULL;
 388         uint32_t i;
 389
 390         switch (validation_level) {
 391         case 2:
 392                 if (!validation || !validation->sam2) {
 393                         return NT_STATUS_INVALID_PARAMETER;
 394                 }
 395                 base = &validation->sam2->base;
 396                 break;
 397         case 3:
 398                 if (!validation || !validation->sam3) {
 399                         return NT_STATUS_INVALID_PARAMETER;
 400                 }
 401                 base = &validation->sam3->base;
 402                 sidcount = validation->sam3->sidcount;
 403                 sids = validation->sam3->sids;
 404                 break;
 405         case 6:
 406                 if (!validation || !validation->sam6) {
 407                         return NT_STATUS_INVALID_PARAMETER;
 408                 }
 409                 base = &validation->sam6->base;
 410                 sidcount = validation->sam6->sidcount;
 411                 sids = validation->sam6->sids;
 412                 dns_domainname = validation->sam6->dns_domainname.string;
 413                 principal = validation->sam6->principal_name.string;
 414                 break;
 415         default:
 416                 return NT_STATUS_INVALID_LEVEL;
 417         }
 418
 419         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 420         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 421
 422         /*
 423            Here is where we should check the list of
 424            trusted domains, and verify that the SID
 425            matches.
 426         */
 427         if (!base->domain_sid) {
 428                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 429                 return NT_STATUS_INVALID_PARAMETER;
 430         }
 431
 432         /* The IDL layer would be a better place to check this, but to
 433          * guard the integer addition below, we double-check */
 434         if (base->groups.count > 65535) {
 435                 return NT_STATUS_INVALID_PARAMETER;
 436         }
 437
 438         user_info_dc->num_sids = 2;
 439
 440         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 441         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 442
 443         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 444         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 445                 return NT_STATUS_INVALID_PARAMETER;
 446         }
 447
 448         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 449         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 450                 return NT_STATUS_INVALID_PARAMETER;
 451         }
 452
 453         for (i = 0; i < base->groups.count; i++) {
 454                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 455                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 456                         return NT_STATUS_INVALID_PARAMETER;
 457                 }
 458                 user_info_dc->num_sids++;
 459         }
 460
 461         /* Copy 'other' sids.  We need to do sid filtering here to
 462            prevent possible elevation of privileges.  See:
 463
 464            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 465          */
 466
 467         /*
 468          * The IDL layer would be a better place to check this, but to
 469          * guard the integer addition below, we double-check
 470          */
 471         if (sidcount > UINT16_MAX) {
 472                 return NT_STATUS_INVALID_PARAMETER;
 473         }
 474
 475         if (sidcount > 0) {
 476                 struct dom_sid *dgrps = user_info_dc->sids;
 477                 size_t dgrps_count;
 478
 479                 dgrps_count = user_info_dc->num_sids + sidcount;
 480                 dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid,
 481                                        dgrps_count);
 482                 if (dgrps == NULL) {
 483                         return NT_STATUS_NO_MEMORY;
 484                 }
 485
 486                 for (i = 0; i < sidcount; i++) {
 487                         if (sids[i].sid) {
 488                                 dgrps[user_info_dc->num_sids] = *sids[i].sid;
 489                                 user_info_dc->num_sids++;
 490                         }
 491                 }
 492
 493                 user_info_dc->sids = dgrps;
 494
 495                 /* Where are the 'global' sids?... */
 496         }
 497
 498         status = make_user_info_SamBaseInfo(user_info_dc, account_name, base, authenticated, &user_info_dc->info);
 499         if (!NT_STATUS_IS_OK(status)) {
 500                 return status;
 501         }
 502
 503         if (dns_domainname != NULL) {
 504                 user_info_dc->info->dns_domain_name = talloc_strdup(user_info_dc->info,
 505                                                                     dns_domainname);
 506                 if (user_info_dc->info->dns_domain_name == NULL) {
 507                         return NT_STATUS_NO_MEMORY;
 508                 }
 509         }
 510
 511         if (principal != NULL) {
 512                 user_info_dc->info->user_principal_name = talloc_strdup(user_info_dc->info,
 513                                                                         principal);
 514                 if (user_info_dc->info->user_principal_name == NULL) {
 515                         return NT_STATUS_NO_MEMORY;
 516                 }
 517         }
 518
 519         /* ensure we are never given NULL session keys */
 520
 521         if (all_zero(base->key.key, sizeof(base->key.key))) {
 522                 user_info_dc->user_session_key = data_blob(NULL, 0);
 523         } else {
 524                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 525                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 526         }
 527
 528         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 529                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 530         } else {
 531                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 532                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 533         }
 534
 535         *_user_info_dc = user_info_dc;
 536         return NT_STATUS_OK;
 537 }
 538
 539 /**
 540  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 541  */
 542 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 543                               const struct PAC_LOGON_INFO *pac_logon_info,
 544                               const struct PAC_UPN_DNS_INFO *pac_upn_dns_info,
 545                               struct auth_user_info_dc **_user_info_dc)
 546 {
 547         uint32_t i;
 548         NTSTATUS nt_status;
 549         union netr_Validation validation;
 550         struct auth_user_info_dc *user_info_dc;
 551         const struct PAC_DOMAIN_GROUP_MEMBERSHIP *rg = NULL;
 552         size_t sidcount;
 553
 554         rg = &pac_logon_info->resource_groups;
 555
 556         validation.sam3 = discard_const_p(struct netr_SamInfo3, &pac_logon_info->info3);
 557
 558         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation,
 559                                                           true, /* This user was authenticated */
 560                                                           &user_info_dc);
 561         if (!NT_STATUS_IS_OK(nt_status)) {
 562                 return nt_status;
 563         }
 564
 565         if (pac_logon_info->info3.base.user_flags & NETLOGON_RESOURCE_GROUPS) {
 566                 rg = &pac_logon_info->resource_groups;
 567         }
 568
 569         if (rg == NULL) {
 570                 *_user_info_dc = user_info_dc;
 571                 return NT_STATUS_OK;
 572         }
 573
 574         if (rg->groups.count > 0) {
 575                 /* The IDL layer would be a better place to check this, but to
 576                  * guard the integer addition below, we double-check */
 577                 if (rg->groups.count > 65535) {
 578                         talloc_free(user_info_dc);
 579                         return NT_STATUS_INVALID_PARAMETER;
 580                 }
 581
 582                 /*
 583                   Here is where we should check the list of
 584                   trusted domains, and verify that the SID
 585                   matches.
 586                 */
 587                 if (rg->domain_sid == NULL) {
 588                         talloc_free(user_info_dc);
 589                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 590                         return NT_STATUS_INVALID_PARAMETER;
 591                 }
 592
 593                 sidcount = user_info_dc->num_sids + rg->groups.count;
 594                 user_info_dc->sids
 595                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 596                 if (user_info_dc->sids == NULL) {
 597                         TALLOC_FREE(user_info_dc);
 598                         return NT_STATUS_NO_MEMORY;
 599                 }
 600
 601                 for (i = 0; i < rg->groups.count; i++) {
 602                         bool ok;
 603
 604                         user_info_dc->sids[user_info_dc->num_sids] = *rg->domain_sid;
 605                         ok = sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 606                                             rg->groups.rids[i].rid);
 607                         if (!ok) {
 608                                 return NT_STATUS_INVALID_PARAMETER;
 609                         }
 610                         user_info_dc->num_sids++;
 611                 }
 612         }
 613
 614         if (pac_upn_dns_info != NULL) {
 615                 user_info_dc->info->user_principal_name =
 616                         talloc_strdup(user_info_dc->info,
 617                                       pac_upn_dns_info->upn_name);
 618                 if (user_info_dc->info->user_principal_name == NULL) {
 619                         return NT_STATUS_NO_MEMORY;
 620                 }
 621
 622                 user_info_dc->info->dns_domain_name =
 623                         talloc_strdup(user_info_dc->info,
 624                                       pac_upn_dns_info->dns_domain_name);
 625                 if (user_info_dc->info->dns_domain_name == NULL) {
 626                         return NT_STATUS_NO_MEMORY;
 627                 }
 628
 629                 if (pac_upn_dns_info->flags & PAC_UPN_DNS_FLAG_CONSTRUCTED) {
 630                         user_info_dc->info->user_principal_constructed = true;
 631                 }
 632         }
 633
 634         *_user_info_dc = user_info_dc;
 635         return NT_STATUS_OK;
 636 }