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