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 _sam3 structure is only as long as
 134  * the user_info_dc it was generated from */
 135 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
 136                                            const struct auth_user_info_dc *user_info_dc,
 137                                            struct netr_SamInfo3 **_sam3)
 138 {
 139         struct netr_SamBaseInfo *sam;
 140         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 141         NTSTATUS status;
 142         size_t i;
 143         NT_STATUS_HAVE_NO_MEMORY(sam3);
 144
 145         status = auth_convert_user_info_dc_sambaseinfo(sam3, user_info_dc, &sam);
 146         if (!NT_STATUS_IS_OK(status)) {
 147                 talloc_free(sam3);
 148                 return status;
 149         }
 150         sam3->base = *sam;
 151         sam3->sidcount  = 0;
 152         sam3->sids      = NULL;
 153
 154
 155         sam3->sids = talloc_array(sam, struct netr_SidAttr,
 156                                   user_info_dc->num_sids);
 157         if (sam3->sids == NULL) {
 158                 TALLOC_FREE(sam3);
 159                 return NT_STATUS_NO_MEMORY;
 160         }
 161
 162         /* We don't put the user and group SIDs in there */
 163         for (i=2; i<user_info_dc->num_sids; i++) {
 164                 if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
 165                         continue;
 166                 }
 167                 sam3->sids[sam3->sidcount].sid = dom_sid_dup(sam3->sids, &user_info_dc->sids[i]);
 168                 if (sam3->sids[sam3->sidcount].sid == NULL) {
 169                         TALLOC_FREE(sam3);
 170                         return NT_STATUS_NO_MEMORY;
 171                 }
 172                 sam3->sids[sam3->sidcount].attributes =
 173                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 174                 sam3->sidcount += 1;
 175         }
 176         if (sam3->sidcount) {
 177                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
 178         } else {
 179                 sam3->sids = NULL;
 180         }
 181         *_sam3 = sam3;
 182
 183         return NT_STATUS_OK;
 184 }
 185
 186 /**
 187  * Make a user_info struct from the info3 or similar returned by a domain logon.
 188  *
 189  * The netr_SamInfo3 is also a key structure in the source3 auth subsystem
 190  */
 191
 192 NTSTATUS make_user_info_SamBaseInfo(TALLOC_CTX *mem_ctx,
 193                                     const char *account_name,
 194                                     const struct netr_SamBaseInfo *base,
 195                                     bool authenticated,
 196                                     struct auth_user_info **_user_info)
 197 {
 198         struct auth_user_info *info;
 199
 200         info = talloc_zero(mem_ctx, struct auth_user_info);
 201         NT_STATUS_HAVE_NO_MEMORY(info);
 202
 203         if (base->account_name.string) {
 204                 info->account_name = talloc_strdup(info, base->account_name.string);
 205         } else {
 206                 info->account_name = talloc_strdup(info, account_name);
 207         }
 208         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 209
 210         if (base->logon_domain.string) {
 211                 info->domain_name = talloc_strdup(info, base->logon_domain.string);
 212                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 213         }
 214
 215         if (base->full_name.string) {
 216                 info->full_name = talloc_strdup(info, base->full_name.string);
 217                 NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 218         }
 219         if (base->logon_script.string) {
 220                 info->logon_script = talloc_strdup(info, base->logon_script.string);
 221                 NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 222         }
 223         if (base->profile_path.string) {
 224                 info->profile_path = talloc_strdup(info, base->profile_path.string);
 225                 NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 226         }
 227         if (base->home_directory.string) {
 228                 info->home_directory = talloc_strdup(info, base->home_directory.string);
 229                 NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 230         }
 231         if (base->home_drive.string) {
 232                 info->home_drive = talloc_strdup(info, base->home_drive.string);
 233                 NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 234         }
 235         if (base->logon_server.string) {
 236                 info->logon_server = talloc_strdup(info, base->logon_server.string);
 237                 NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 238         }
 239         info->last_logon = base->logon_time;
 240         info->last_logoff = base->logoff_time;
 241         info->acct_expiry = base->kickoff_time;
 242         info->last_password_change = base->last_password_change;
 243         info->allow_password_change = base->allow_password_change;
 244         info->force_password_change = base->force_password_change;
 245         info->logon_count = base->logon_count;
 246         info->bad_password_count = base->bad_password_count;
 247         info->acct_flags = base->acct_flags;
 248
 249         /* Only set authenticated if both NETLOGON_GUEST is not set, and authenticated is set */
 250         info->authenticated = (authenticated && (!(base->user_flags & NETLOGON_GUEST)));
 251
 252         *_user_info = info;
 253         return NT_STATUS_OK;
 254 }
 255
 256 /**
 257  * Make a user_info_dc struct from the info3 returned by a domain logon
 258  */
 259 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 260                                               const char *account_name,
 261                                               uint16_t validation_level,
 262                                               const union netr_Validation *validation,
 263                                                bool authenticated,
 264                                               struct auth_user_info_dc **_user_info_dc)
 265 {
 266         NTSTATUS status;
 267         struct auth_user_info_dc *user_info_dc = NULL;
 268         const struct netr_SamBaseInfo *base = NULL;
 269         uint32_t sidcount = 0;
 270         const struct netr_SidAttr *sids = NULL;
 271         const char *dns_domainname = NULL;
 272         const char *principal = NULL;
 273         uint32_t i;
 274
 275         switch (validation_level) {
 276         case 2:
 277                 if (!validation || !validation->sam2) {
 278                         return NT_STATUS_INVALID_PARAMETER;
 279                 }
 280                 base = &validation->sam2->base;
 281                 break;
 282         case 3:
 283                 if (!validation || !validation->sam3) {
 284                         return NT_STATUS_INVALID_PARAMETER;
 285                 }
 286                 base = &validation->sam3->base;
 287                 sidcount = validation->sam3->sidcount;
 288                 sids = validation->sam3->sids;
 289                 break;
 290         case 6:
 291                 if (!validation || !validation->sam6) {
 292                         return NT_STATUS_INVALID_PARAMETER;
 293                 }
 294                 base = &validation->sam6->base;
 295                 sidcount = validation->sam6->sidcount;
 296                 sids = validation->sam6->sids;
 297                 dns_domainname = validation->sam6->dns_domainname.string;
 298                 principal = validation->sam6->principal_name.string;
 299                 break;
 300         default:
 301                 return NT_STATUS_INVALID_LEVEL;
 302         }
 303
 304         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 305         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 306
 307         /*
 308            Here is where we should check the list of
 309            trusted domains, and verify that the SID
 310            matches.
 311         */
 312         if (!base->domain_sid) {
 313                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 314                 return NT_STATUS_INVALID_PARAMETER;
 315         }
 316
 317         /* The IDL layer would be a better place to check this, but to
 318          * guard the integer addition below, we double-check */
 319         if (base->groups.count > 65535) {
 320                 return NT_STATUS_INVALID_PARAMETER;
 321         }
 322
 323         user_info_dc->num_sids = 2;
 324
 325         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 326         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 327
 328         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 329         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 330                 return NT_STATUS_INVALID_PARAMETER;
 331         }
 332
 333         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 334         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 335                 return NT_STATUS_INVALID_PARAMETER;
 336         }
 337
 338         for (i = 0; i < base->groups.count; i++) {
 339                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 340                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 341                         return NT_STATUS_INVALID_PARAMETER;
 342                 }
 343                 user_info_dc->num_sids++;
 344         }
 345
 346         /* Copy 'other' sids.  We need to do sid filtering here to
 347            prevent possible elevation of privileges.  See:
 348
 349            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 350          */
 351
 352         /*
 353          * The IDL layer would be a better place to check this, but to
 354          * guard the integer addition below, we double-check
 355          */
 356         if (sidcount > UINT16_MAX) {
 357                 return NT_STATUS_INVALID_PARAMETER;
 358         }
 359
 360         if (sidcount > 0) {
 361                 struct dom_sid *dgrps = user_info_dc->sids;
 362                 size_t dgrps_count;
 363
 364                 dgrps_count = user_info_dc->num_sids + sidcount;
 365                 dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid,
 366                                        dgrps_count);
 367                 if (dgrps == NULL) {
 368                         return NT_STATUS_NO_MEMORY;
 369                 }
 370
 371                 for (i = 0; i < sidcount; i++) {
 372                         if (sids[i].sid) {
 373                                 dgrps[user_info_dc->num_sids] = *sids[i].sid;
 374                                 user_info_dc->num_sids++;
 375                         }
 376                 }
 377
 378                 user_info_dc->sids = dgrps;
 379
 380                 /* Where are the 'global' sids?... */
 381         }
 382
 383         status = make_user_info_SamBaseInfo(user_info_dc, account_name, base, authenticated, &user_info_dc->info);
 384         if (!NT_STATUS_IS_OK(status)) {
 385                 return status;
 386         }
 387
 388         if (dns_domainname != NULL) {
 389                 user_info_dc->info->dns_domain_name = talloc_strdup(user_info_dc->info,
 390                                                                     dns_domainname);
 391                 if (user_info_dc->info->dns_domain_name == NULL) {
 392                         return NT_STATUS_NO_MEMORY;
 393                 }
 394         }
 395
 396         if (principal != NULL) {
 397                 user_info_dc->info->user_principal_name = talloc_strdup(user_info_dc->info,
 398                                                                         principal);
 399                 if (user_info_dc->info->user_principal_name == NULL) {
 400                         return NT_STATUS_NO_MEMORY;
 401                 }
 402         }
 403
 404         /* ensure we are never given NULL session keys */
 405
 406         if (all_zero(base->key.key, sizeof(base->key.key))) {
 407                 user_info_dc->user_session_key = data_blob(NULL, 0);
 408         } else {
 409                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 410                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 411         }
 412
 413         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 414                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 415         } else {
 416                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 417                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 418         }
 419
 420         *_user_info_dc = user_info_dc;
 421         return NT_STATUS_OK;
 422 }
 423
 424 /**
 425  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 426  */
 427 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 428                               const struct PAC_LOGON_INFO *pac_logon_info,
 429                               struct auth_user_info_dc **_user_info_dc)
 430 {
 431         uint32_t i;
 432         NTSTATUS nt_status;
 433         union netr_Validation validation;
 434         struct auth_user_info_dc *user_info_dc;
 435
 436         validation.sam3 = discard_const_p(struct netr_SamInfo3, &pac_logon_info->info3);
 437
 438         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation,
 439                                                           true, /* This user was authenticated */
 440                                                           &user_info_dc);
 441         if (!NT_STATUS_IS_OK(nt_status)) {
 442                 return nt_status;
 443         }
 444
 445         if (pac_logon_info->res_groups.count > 0) {
 446                 size_t sidcount;
 447                 /* The IDL layer would be a better place to check this, but to
 448                  * guard the integer addition below, we double-check */
 449                 if (pac_logon_info->res_groups.count > 65535) {
 450                         talloc_free(user_info_dc);
 451                         return NT_STATUS_INVALID_PARAMETER;
 452                 }
 453
 454                 /*
 455                   Here is where we should check the list of
 456                   trusted domains, and verify that the SID
 457                   matches.
 458                 */
 459                 if (!pac_logon_info->res_group_dom_sid) {
 460                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 461                         return NT_STATUS_INVALID_PARAMETER;
 462                 }
 463
 464                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
 465                 user_info_dc->sids
 466                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 467                 if (user_info_dc->sids == NULL) {
 468                         TALLOC_FREE(user_info_dc);
 469                         return NT_STATUS_NO_MEMORY;
 470                 }
 471
 472                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 473                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
 474                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 475                                             pac_logon_info->res_groups.rids[i].rid)) {
 476                                 return NT_STATUS_INVALID_PARAMETER;
 477                         }
 478                         user_info_dc->num_sids++;
 479                 }
 480         }
 481         *_user_info_dc = user_info_dc;
 482         return NT_STATUS_OK;
 483 }