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                                               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->last_logon = info->last_logon;
  63         sam->last_logoff =  info->last_logoff;
  64         sam->acct_expiry = 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->domain.string = user_info_dc->info->domain_name;
 111
 112         ZERO_STRUCT(sam->unknown);
 113
 114         ZERO_STRUCT(sam->key);
 115         if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
 116                 memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
 117         }
 118
 119         ZERO_STRUCT(sam->LMSessKey);
 120         if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
 121                 memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
 122                        sizeof(sam->LMSessKey.key));
 123         }
 124
 125         *_sam = sam;
 126
 127         return NT_STATUS_OK;
 128 }
 129
 130 /* Note that the validity of the _sam3 structure is only as long as
 131  * the user_info_dc it was generated from */
 132 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
 133                                            struct auth_user_info_dc *user_info_dc,
 134                                            struct netr_SamInfo3 **_sam3)
 135 {
 136         struct netr_SamBaseInfo *sam;
 137         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 138         NTSTATUS status;
 139         size_t i;
 140         NT_STATUS_HAVE_NO_MEMORY(sam3);
 141
 142         status = auth_convert_user_info_dc_sambaseinfo(sam3, user_info_dc, &sam);
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 talloc_free(sam3);
 145                 return status;
 146         }
 147         sam3->base = *sam;
 148         sam3->sidcount  = 0;
 149         sam3->sids      = NULL;
 150
 151
 152         sam3->sids = talloc_array(sam, struct netr_SidAttr,
 153                                   user_info_dc->num_sids);
 154         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids, sam3);
 155
 156         /* We don't put the user and group SIDs in there */
 157         for (i=2; i<user_info_dc->num_sids; i++) {
 158                 if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
 159                         continue;
 160                 }
 161                 sam3->sids[sam3->sidcount].sid = dom_sid_dup(sam3->sids, &user_info_dc->sids[i]);
 162                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids[sam3->sidcount].sid, sam3);
 163                 sam3->sids[sam3->sidcount].attributes =
 164                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 165                 sam3->sidcount += 1;
 166         }
 167         if (sam3->sidcount) {
 168                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
 169         } else {
 170                 sam3->sids = NULL;
 171         }
 172         *_sam3 = sam3;
 173
 174         return NT_STATUS_OK;
 175 }
 176
 177 /**
 178  * Make a user_info struct from the info3 or similar returned by a domain logon.
 179  *
 180  * The netr_SamInfo3 is also a key structure in the source3 auth subsystem
 181  */
 182
 183 NTSTATUS make_user_info_SamBaseInfo(TALLOC_CTX *mem_ctx,
 184                                     const char *account_name,
 185                                     struct netr_SamBaseInfo *base,
 186                                     bool authenticated,
 187                                     struct auth_user_info **_user_info)
 188 {
 189         struct auth_user_info *info;
 190
 191         info = talloc_zero(mem_ctx, struct auth_user_info);
 192         NT_STATUS_HAVE_NO_MEMORY(info);
 193
 194         if (base->account_name.string) {
 195                 info->account_name = talloc_strdup(info, base->account_name.string);
 196         } else {
 197                 info->account_name = talloc_strdup(info, account_name);
 198         }
 199         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 200
 201         if (base->domain.string) {
 202                 info->domain_name = talloc_strdup(info, base->domain.string);
 203                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 204         }
 205
 206         if (base->full_name.string) {
 207                 info->full_name = talloc_strdup(info, base->full_name.string);
 208                 NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 209         }
 210         if (base->logon_script.string) {
 211                 info->logon_script = talloc_strdup(info, base->logon_script.string);
 212                 NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 213         }
 214         if (base->profile_path.string) {
 215                 info->profile_path = talloc_strdup(info, base->profile_path.string);
 216                 NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 217         }
 218         if (base->home_directory.string) {
 219                 info->home_directory = talloc_strdup(info, base->home_directory.string);
 220                 NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 221         }
 222         if (base->home_drive.string) {
 223                 info->home_drive = talloc_strdup(info, base->home_drive.string);
 224                 NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 225         }
 226         if (base->logon_server.string) {
 227                 info->logon_server = talloc_strdup(info, base->logon_server.string);
 228                 NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 229         }
 230         info->last_logon = base->last_logon;
 231         info->last_logoff = base->last_logoff;
 232         info->acct_expiry = base->acct_expiry;
 233         info->last_password_change = base->last_password_change;
 234         info->allow_password_change = base->allow_password_change;
 235         info->force_password_change = base->force_password_change;
 236         info->logon_count = base->logon_count;
 237         info->bad_password_count = base->bad_password_count;
 238         info->acct_flags = base->acct_flags;
 239
 240         /* Only set authenticated if both NETLOGON_GUEST is not set, and authenticated is set */
 241         info->authenticated = (authenticated && (!(base->user_flags & NETLOGON_GUEST)));
 242
 243         *_user_info = info;
 244         return NT_STATUS_OK;
 245 }
 246
 247 /**
 248  * Make a user_info_dc struct from the info3 returned by a domain logon
 249  */
 250 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 251                                               const char *account_name,
 252                                               uint16_t validation_level,
 253                                               union netr_Validation *validation,
 254                                                bool authenticated,
 255                                               struct auth_user_info_dc **_user_info_dc)
 256 {
 257         NTSTATUS status;
 258         struct auth_user_info_dc *user_info_dc;
 259         struct netr_SamBaseInfo *base = NULL;
 260         uint32_t i;
 261
 262         switch (validation_level) {
 263         case 2:
 264                 if (!validation || !validation->sam2) {
 265                         return NT_STATUS_INVALID_PARAMETER;
 266                 }
 267                 base = &validation->sam2->base;
 268                 break;
 269         case 3:
 270                 if (!validation || !validation->sam3) {
 271                         return NT_STATUS_INVALID_PARAMETER;
 272                 }
 273                 base = &validation->sam3->base;
 274                 break;
 275         case 6:
 276                 if (!validation || !validation->sam6) {
 277                         return NT_STATUS_INVALID_PARAMETER;
 278                 }
 279                 base = &validation->sam6->base;
 280                 break;
 281         default:
 282                 return NT_STATUS_INVALID_LEVEL;
 283         }
 284
 285         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 286         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 287
 288         /*
 289            Here is where we should check the list of
 290            trusted domains, and verify that the SID
 291            matches.
 292         */
 293         if (!base->domain_sid) {
 294                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 295                 return NT_STATUS_INVALID_PARAMETER;
 296         }
 297
 298         /* The IDL layer would be a better place to check this, but to
 299          * guard the integer addition below, we double-check */
 300         if (base->groups.count > 65535) {
 301                 return NT_STATUS_INVALID_PARAMETER;
 302         }
 303
 304         user_info_dc->num_sids = 2;
 305
 306         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 307         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 308
 309         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 310         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 311                 return NT_STATUS_INVALID_PARAMETER;
 312         }
 313
 314         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 315         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 316                 return NT_STATUS_INVALID_PARAMETER;
 317         }
 318
 319         for (i = 0; i < base->groups.count; i++) {
 320                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 321                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 322                         return NT_STATUS_INVALID_PARAMETER;
 323                 }
 324                 user_info_dc->num_sids++;
 325         }
 326
 327         /* Copy 'other' sids.  We need to do sid filtering here to
 328            prevent possible elevation of privileges.  See:
 329
 330            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 331          */
 332
 333         if (validation_level == 3) {
 334                 struct dom_sid *dgrps = user_info_dc->sids;
 335                 size_t sidcount;
 336
 337                 /* The IDL layer would be a better place to check this, but to
 338                  * guard the integer addition below, we double-check */
 339                 if (validation->sam3->sidcount > 65535) {
 340                         return NT_STATUS_INVALID_PARAMETER;
 341                 }
 342
 343                 sidcount = user_info_dc->num_sids + validation->sam3->sidcount;
 344                 if (validation->sam3->sidcount > 0) {
 345                         dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid, sidcount);
 346                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 347
 348                         for (i = 0; i < validation->sam3->sidcount; i++) {
 349                                 if (validation->sam3->sids[i].sid) {
 350                                         dgrps[user_info_dc->num_sids] = *validation->sam3->sids[i].sid;
 351                                         user_info_dc->num_sids++;
 352                                 }
 353                         }
 354                 }
 355
 356                 user_info_dc->sids = dgrps;
 357
 358                 /* Where are the 'global' sids?... */
 359         }
 360
 361         status = make_user_info_SamBaseInfo(user_info_dc, account_name, base, authenticated, &user_info_dc->info);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 return status;
 364         }
 365
 366         /* ensure we are never given NULL session keys */
 367
 368         if (all_zero(base->key.key, sizeof(base->key.key))) {
 369                 user_info_dc->user_session_key = data_blob(NULL, 0);
 370         } else {
 371                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 372                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 373         }
 374
 375         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 376                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 377         } else {
 378                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 379                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 380         }
 381
 382         *_user_info_dc = user_info_dc;
 383         return NT_STATUS_OK;
 384 }
 385
 386 /**
 387  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 388  */
 389 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 390                               struct PAC_LOGON_INFO *pac_logon_info,
 391                               struct auth_user_info_dc **_user_info_dc)
 392 {
 393         uint32_t i;
 394         NTSTATUS nt_status;
 395         union netr_Validation validation;
 396         struct auth_user_info_dc *user_info_dc;
 397
 398         validation.sam3 = &pac_logon_info->info3;
 399
 400         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation,
 401                                                           true, /* This user was authenticated */
 402                                                           &user_info_dc);
 403         if (!NT_STATUS_IS_OK(nt_status)) {
 404                 return nt_status;
 405         }
 406
 407         if (pac_logon_info->res_groups.count > 0) {
 408                 size_t sidcount;
 409                 /* The IDL layer would be a better place to check this, but to
 410                  * guard the integer addition below, we double-check */
 411                 if (pac_logon_info->res_groups.count > 65535) {
 412                         talloc_free(user_info_dc);
 413                         return NT_STATUS_INVALID_PARAMETER;
 414                 }
 415
 416                 /*
 417                   Here is where we should check the list of
 418                   trusted domains, and verify that the SID
 419                   matches.
 420                 */
 421                 if (!pac_logon_info->res_group_dom_sid) {
 422                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 423                         return NT_STATUS_INVALID_PARAMETER;
 424                 }
 425
 426                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
 427                 user_info_dc->sids
 428                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 429                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->sids, user_info_dc);
 430
 431                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 432                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
 433                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 434                                             pac_logon_info->res_groups.rids[i].rid)) {
 435                                 return NT_STATUS_INVALID_PARAMETER;
 436                         }
 437                         user_info_dc->num_sids++;
 438                 }
 439         }
 440         *_user_info_dc = user_info_dc;
 441         return NT_STATUS_OK;
 442 }