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
   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         sam->acct_flags = user_info_dc->info->acct_flags;
 106         sam->logon_server.string = user_info_dc->info->logon_server;
 107         sam->domain.string = user_info_dc->info->domain_name;
 108
 109         ZERO_STRUCT(sam->unknown);
 110
 111         ZERO_STRUCT(sam->key);
 112         if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
 113                 memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
 114         }
 115
 116         ZERO_STRUCT(sam->LMSessKey);
 117         if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
 118                 memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
 119                        sizeof(sam->LMSessKey.key));
 120         }
 121
 122         *_sam = sam;
 123
 124         return NT_STATUS_OK;
 125 }
 126
 127 /* Note that the validity of the _sam3 structure is only as long as
 128  * the user_info_dc it was generated from */
 129 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
 130                                            struct auth_user_info_dc *user_info_dc,
 131                                            struct netr_SamInfo3 **_sam3)
 132 {
 133         struct netr_SamBaseInfo *sam;
 134         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 135         NTSTATUS status;
 136         size_t i;
 137         NT_STATUS_HAVE_NO_MEMORY(sam3);
 138
 139         status = auth_convert_user_info_dc_sambaseinfo(sam3, user_info_dc, &sam);
 140         if (!NT_STATUS_IS_OK(status)) {
 141                 talloc_free(sam3);
 142                 return status;
 143         }
 144         sam3->base = *sam;
 145         sam3->sidcount  = 0;
 146         sam3->sids      = NULL;
 147
 148
 149         sam3->sids = talloc_array(sam, struct netr_SidAttr,
 150                                   user_info_dc->num_sids);
 151         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids, sam3);
 152
 153         /* We don't put the user and group SIDs in there */
 154         for (i=2; i<user_info_dc->num_sids; i++) {
 155                 if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
 156                         continue;
 157                 }
 158                 sam3->sids[sam3->sidcount].sid = dom_sid_dup(sam3->sids, &user_info_dc->sids[i]);
 159                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids[sam3->sidcount].sid, sam3);
 160                 sam3->sids[sam3->sidcount].attributes =
 161                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 162                 sam3->sidcount += 1;
 163         }
 164         if (sam3->sidcount) {
 165                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
 166         } else {
 167                 sam3->sids = NULL;
 168         }
 169         *_sam3 = sam3;
 170
 171         return NT_STATUS_OK;
 172 }
 173
 174 /**
 175  * Make a user_info_dc struct from the info3 returned by a domain logon
 176  */
 177 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
 178                                               const char *account_name,
 179                                               uint16_t validation_level,
 180                                               union netr_Validation *validation,
 181                                               struct auth_user_info_dc **_user_info_dc)
 182 {
 183         struct auth_user_info_dc *user_info_dc;
 184         struct auth_user_info *info;
 185         struct netr_SamBaseInfo *base = NULL;
 186         uint32_t i;
 187
 188         switch (validation_level) {
 189         case 2:
 190                 if (!validation || !validation->sam2) {
 191                         return NT_STATUS_INVALID_PARAMETER;
 192                 }
 193                 base = &validation->sam2->base;
 194                 break;
 195         case 3:
 196                 if (!validation || !validation->sam3) {
 197                         return NT_STATUS_INVALID_PARAMETER;
 198                 }
 199                 base = &validation->sam3->base;
 200                 break;
 201         case 6:
 202                 if (!validation || !validation->sam6) {
 203                         return NT_STATUS_INVALID_PARAMETER;
 204                 }
 205                 base = &validation->sam6->base;
 206                 break;
 207         default:
 208                 return NT_STATUS_INVALID_LEVEL;
 209         }
 210
 211         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 212         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 213
 214         /*
 215            Here is where we should check the list of
 216            trusted domains, and verify that the SID
 217            matches.
 218         */
 219         if (!base->domain_sid) {
 220                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
 221                 return NT_STATUS_INVALID_PARAMETER;
 222         }
 223
 224         /* The IDL layer would be a better place to check this, but to
 225          * guard the integer addition below, we double-check */
 226         if (base->groups.count > 65535) {
 227                 return NT_STATUS_INVALID_PARAMETER;
 228         }
 229
 230         user_info_dc->num_sids = 2;
 231
 232         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
 233         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 234
 235         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
 236         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
 237                 return NT_STATUS_INVALID_PARAMETER;
 238         }
 239
 240         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
 241         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
 242                 return NT_STATUS_INVALID_PARAMETER;
 243         }
 244
 245         for (i = 0; i < base->groups.count; i++) {
 246                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
 247                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
 248                         return NT_STATUS_INVALID_PARAMETER;
 249                 }
 250                 user_info_dc->num_sids++;
 251         }
 252
 253         /* Copy 'other' sids.  We need to do sid filtering here to
 254            prevent possible elevation of privileges.  See:
 255
 256            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 257          */
 258
 259         if (validation_level == 3) {
 260                 struct dom_sid *dgrps = user_info_dc->sids;
 261                 size_t sidcount;
 262
 263                 /* The IDL layer would be a better place to check this, but to
 264                  * guard the integer addition below, we double-check */
 265                 if (validation->sam3->sidcount > 65535) {
 266                         return NT_STATUS_INVALID_PARAMETER;
 267                 }
 268
 269                 sidcount = user_info_dc->num_sids + validation->sam3->sidcount;
 270                 if (validation->sam3->sidcount > 0) {
 271                         dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid, sidcount);
 272                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 273
 274                         for (i = 0; i < validation->sam3->sidcount; i++) {
 275                                 if (validation->sam3->sids[i].sid) {
 276                                         dgrps[user_info_dc->num_sids] = *validation->sam3->sids[i].sid;
 277                                         user_info_dc->num_sids++;
 278                                 }
 279                         }
 280                 }
 281
 282                 user_info_dc->sids = dgrps;
 283
 284                 /* Where are the 'global' sids?... */
 285         }
 286
 287         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 288         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 289
 290         if (base->account_name.string) {
 291                 info->account_name = talloc_reference(info, base->account_name.string);
 292         } else {
 293                 info->account_name = talloc_strdup(info, account_name);
 294                 NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 295         }
 296
 297         info->domain_name = talloc_reference(info, base->domain.string);
 298         info->full_name = talloc_reference(info, base->full_name.string);
 299         info->logon_script = talloc_reference(info, base->logon_script.string);
 300         info->profile_path = talloc_reference(info, base->profile_path.string);
 301         info->home_directory = talloc_reference(info, base->home_directory.string);
 302         info->home_drive = talloc_reference(info, base->home_drive.string);
 303         info->logon_server = talloc_reference(info, base->logon_server.string);
 304         info->last_logon = base->last_logon;
 305         info->last_logoff = base->last_logoff;
 306         info->acct_expiry = base->acct_expiry;
 307         info->last_password_change = base->last_password_change;
 308         info->allow_password_change = base->allow_password_change;
 309         info->force_password_change = base->force_password_change;
 310         info->logon_count = base->logon_count;
 311         info->bad_password_count = base->bad_password_count;
 312         info->acct_flags = base->acct_flags;
 313
 314         info->authenticated = true;
 315
 316         /* ensure we are never given NULL session keys */
 317
 318         if (all_zero(base->key.key, sizeof(base->key.key))) {
 319                 user_info_dc->user_session_key = data_blob(NULL, 0);
 320         } else {
 321                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
 322                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 323         }
 324
 325         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 326                 user_info_dc->lm_session_key = data_blob(NULL, 0);
 327         } else {
 328                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 329                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 330         }
 331
 332         *_user_info_dc = user_info_dc;
 333         return NT_STATUS_OK;
 334 }
 335
 336 /**
 337  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
 338  */
 339 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
 340                               struct PAC_LOGON_INFO *pac_logon_info,
 341                               struct auth_user_info_dc **_user_info_dc)
 342 {
 343         uint32_t i;
 344         NTSTATUS nt_status;
 345         union netr_Validation validation;
 346         struct auth_user_info_dc *user_info_dc;
 347
 348         validation.sam3 = &pac_logon_info->info3;
 349
 350         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation, &user_info_dc);
 351         if (!NT_STATUS_IS_OK(nt_status)) {
 352                 return nt_status;
 353         }
 354
 355         if (pac_logon_info->res_groups.count > 0) {
 356                 size_t sidcount;
 357                 /* The IDL layer would be a better place to check this, but to
 358                  * guard the integer addition below, we double-check */
 359                 if (pac_logon_info->res_groups.count > 65535) {
 360                         talloc_free(user_info_dc);
 361                         return NT_STATUS_INVALID_PARAMETER;
 362                 }
 363
 364                 /*
 365                   Here is where we should check the list of
 366                   trusted domains, and verify that the SID
 367                   matches.
 368                 */
 369                 if (!pac_logon_info->res_group_dom_sid) {
 370                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
 371                         return NT_STATUS_INVALID_PARAMETER;
 372                 }
 373
 374                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
 375                 user_info_dc->sids
 376                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
 377                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->sids, user_info_dc);
 378
 379                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
 380                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
 381                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
 382                                             pac_logon_info->res_groups.rids[i].rid)) {
 383                                 return NT_STATUS_INVALID_PARAMETER;
 384                         }
 385                         user_info_dc->num_sids++;
 386                 }
 387         }
 388         *_user_info_dc = user_info_dc;
 389         return NT_STATUS_OK;
 390 }