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_dc struct from the info3 returned by a domain logon
 179  */
 180 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 181                                               const char *account_name,
 182                                               uint16_t validation_level,
 183                                               union netr_Validation *validation,
 184                                               struct auth_user_info_dc **_user_info_dc)
 185 {
 186         struct auth_user_info_dc *user_info_dc;
 187         struct auth_user_info *info;
 188         struct netr_SamBaseInfo *base = NULL;
 189         uint32_t i;
 190
 191         switch (validation_level) {
 192         case 2:
 193                 if (!validation || !validation->sam2) {
 194                         return NT_STATUS_INVALID_PARAMETER;
 195                 }
 196                 base = &validation->sam2->base;
 197                 break;
 198         case 3:
 199                 if (!validation || !validation->sam3) {
 200                         return NT_STATUS_INVALID_PARAMETER;
 201                 }
 202                 base = &validation->sam3->base;
 203                 break;
 204         case 6:
 205                 if (!validation || !validation->sam6) {
 206                         return NT_STATUS_INVALID_PARAMETER;
 207                 }
 208                 base = &validation->sam6->base;
 209                 break;
 210         default:
 211                 return NT_STATUS_INVALID_LEVEL;
 212         }
 213
 214         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 215         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 216
 217         /*
 218            Here is where we should check the list of
 219            trusted domains, and verify that the SID
 220            matches.
 221         */
 222         if (!base->domain_sid) {
 223                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 224                 return NT_STATUS_INVALID_PARAMETER;
 225         }
 226
 227         /* The IDL layer would be a better place to check this, but to
 228          * guard the integer addition below, we double-check */
 229         if (base->groups.count > 65535) {
 230                 return NT_STATUS_INVALID_PARAMETER;
 231         }
 232
 233         user_info_dc->num_sids = 2;
 234
 235         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 236         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 237
 238         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 239         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 240                 return NT_STATUS_INVALID_PARAMETER;
 241         }
 242
 243         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 244         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 245                 return NT_STATUS_INVALID_PARAMETER;
 246         }
 247
 248         for (i = 0; i < base->groups.count; i++) {
 249                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 250                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 251                         return NT_STATUS_INVALID_PARAMETER;
 252                 }
 253                 user_info_dc->num_sids++;
 254         }
 255
 256         /* Copy 'other' sids.  We need to do sid filtering here to
 257            prevent possible elevation of privileges.  See:
 258
 259            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 260          */
 261
 262         if (validation_level == 3) {
 263                 struct dom_sid *dgrps = user_info_dc->sids;
 264                 size_t sidcount;
 265
 266                 /* The IDL layer would be a better place to check this, but to
 267                  * guard the integer addition below, we double-check */
 268                 if (validation->sam3->sidcount > 65535) {
 269                         return NT_STATUS_INVALID_PARAMETER;
 270                 }
 271
 272                 sidcount = user_info_dc->num_sids + validation->sam3->sidcount;
 273                 if (validation->sam3->sidcount > 0) {
 274                         dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid, sidcount);
 275                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 276
 277                         for (i = 0; i < validation->sam3->sidcount; i++) {
 278                                 if (validation->sam3->sids[i].sid) {
 279                                         dgrps[user_info_dc->num_sids] = *validation->sam3->sids[i].sid;
 280                                         user_info_dc->num_sids++;
 281                                 }
 282                         }
 283                 }
 284
 285                 user_info_dc->sids = dgrps;
 286
 287                 /* Where are the 'global' sids?... */
 288         }
 289
 290         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 291         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 292
 293         if (base->account_name.string) {
 294                 info->account_name = talloc_reference(info, base->account_name.string);
 295         } else {
 296                 info->account_name = talloc_strdup(info, account_name);
 297                 NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 298         }
 299
 300         info->domain_name = talloc_reference(info, base->domain.string);
 301         info->full_name = talloc_reference(info, base->full_name.string);
 302         info->logon_script = talloc_reference(info, base->logon_script.string);
 303         info->profile_path = talloc_reference(info, base->profile_path.string);
 304         info->home_directory = talloc_reference(info, base->home_directory.string);
 305         info->home_drive = talloc_reference(info, base->home_drive.string);
 306         info->logon_server = talloc_reference(info, base->logon_server.string);
 307         info->last_logon = base->last_logon;
 308         info->last_logoff = base->last_logoff;
 309         info->acct_expiry = base->acct_expiry;
 310         info->last_password_change = base->last_password_change;
 311         info->allow_password_change = base->allow_password_change;
 312         info->force_password_change = base->force_password_change;
 313         info->logon_count = base->logon_count;
 314         info->bad_password_count = base->bad_password_count;
 315         info->acct_flags = base->acct_flags;
 316
 317         info->authenticated = true;
 318
 319         /* ensure we are never given NULL session keys */
 320
 321         if (all_zero(base->key.key, sizeof(base->key.key))) {
 322                 user_info_dc->user_session_key = data_blob(NULL, 0);
 323         } else {
 324                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 325                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 326         }
 327
 328         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 329                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 330         } else {
 331                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 332                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 333         }
 334
 335         *_user_info_dc = user_info_dc;
 336         return NT_STATUS_OK;
 337 }
 338
 339 /**
 340  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 341  */
 342 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 343                               struct PAC_LOGON_INFO *pac_logon_info,
 344                               struct auth_user_info_dc **_user_info_dc)
 345 {
 346         uint32_t i;
 347         NTSTATUS nt_status;
 348         union netr_Validation validation;
 349         struct auth_user_info_dc *user_info_dc;
 350
 351         validation.sam3 = &pac_logon_info->info3;
 352
 353         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation, &user_info_dc);
 354         if (!NT_STATUS_IS_OK(nt_status)) {
 355                 return nt_status;
 356         }
 357
 358         if (pac_logon_info->res_groups.count > 0) {
 359                 size_t sidcount;
 360                 /* The IDL layer would be a better place to check this, but to
 361                  * guard the integer addition below, we double-check */
 362                 if (pac_logon_info->res_groups.count > 65535) {
 363                         talloc_free(user_info_dc);
 364                         return NT_STATUS_INVALID_PARAMETER;
 365                 }
 366
 367                 /*
 368                   Here is where we should check the list of
 369                   trusted domains, and verify that the SID
 370                   matches.
 371                 */
 372                 if (!pac_logon_info->res_group_dom_sid) {
 373                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 374                         return NT_STATUS_INVALID_PARAMETER;
 375                 }
 376
 377                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
 378                 user_info_dc->sids
 379                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 380                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->sids, user_info_dc);
 381
 382                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 383                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
 384                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 385                                             pac_logon_info->res_groups.rids[i].rid)) {
 386                                 return NT_STATUS_INVALID_PARAMETER;
 387                         }
 388                         user_info_dc->num_sids++;
 389                 }
 390         }
 391         *_user_info_dc = user_info_dc;
 392         return NT_STATUS_OK;
 393 }