source4/auth/system_session.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001-2010
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8    Copyright (C) Stefan Metzmacher 2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "libcli/security/security.h"
  26 #include "auth/credentials/credentials.h"
  27 #include "param/param.h"
  28 #include "auth/auth.h" /* for auth_user_info_dc */
  29 #include "auth/session.h"
  30 #include "auth/system_session_proto.h"
  31
  32 #undef DBGC_CLASS
  33 #define DBGC_CLASS DBGC_AUTH
  34
  35 /*
  36   prevent the static system session being freed
  37  */
  38 static int system_session_destructor(struct auth_session_info *info)
  39 {
  40         return -1;
  41 }
  42
  43 /* Create a security token for a session SYSTEM (the most
  44  * trusted/privileged account), including the local machine account as
  45  * the off-host credentials
  46  */
  47 _PUBLIC_ struct auth_session_info *system_session(struct loadparm_context *lp_ctx)
  48 {
  49         static struct auth_session_info *static_session;
  50         NTSTATUS nt_status;
  51
  52         if (static_session) {
  53                 return static_session;
  54         }
  55
  56         /*
  57          * Use NULL here, not the autofree context for this
  58          * static pointer. The destructor prevents freeing this
  59          * memory anyway.
  60          */
  61         nt_status = auth_system_session_info(NULL,
  62                                              lp_ctx,
  63                                              &static_session);
  64         if (!NT_STATUS_IS_OK(nt_status)) {
  65                 TALLOC_FREE(static_session);
  66                 return NULL;
  67         }
  68         talloc_set_destructor(static_session, system_session_destructor);
  69         return static_session;
  70 }
  71
  72 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
  73                                   struct loadparm_context *lp_ctx,
  74                                   struct auth_session_info **_session_info)
  75 {
  76         NTSTATUS nt_status;
  77         struct auth_user_info_dc *user_info_dc = NULL;
  78         struct auth_session_info *session_info = NULL;
  79         TALLOC_CTX *mem_ctx = NULL;
  80         bool ok;
  81
  82         mem_ctx = talloc_new(parent_ctx);
  83         if (mem_ctx == NULL) {
  84                 return NT_STATUS_NO_MEMORY;
  85         }
  86
  87         nt_status = auth_system_user_info_dc(mem_ctx, lpcfg_netbios_name(lp_ctx),
  88                                             &user_info_dc);
  89         if (!NT_STATUS_IS_OK(nt_status)) {
  90                 talloc_free(mem_ctx);
  91                 return nt_status;
  92         }
  93
  94         /* references the user_info_dc into the session_info */
  95         nt_status = auth_generate_session_info(parent_ctx, NULL, NULL, user_info_dc, AUTH_SESSION_INFO_SIMPLE_PRIVILEGES, &session_info);
  96         talloc_free(mem_ctx);
  97
  98         NT_STATUS_NOT_OK_RETURN(nt_status);
  99
 100         session_info->credentials = cli_credentials_init(session_info);
 101         if (!session_info->credentials) {
 102                 return NT_STATUS_NO_MEMORY;
 103         }
 104
 105         ok = cli_credentials_set_conf(session_info->credentials, lp_ctx);
 106         if (!ok) {
 107                 return NT_STATUS_INTERNAL_ERROR;
 108         }
 109
 110         cli_credentials_set_machine_account_pending(session_info->credentials, lp_ctx);
 111         *_session_info = session_info;
 112
 113         return NT_STATUS_OK;
 114 }
 115
 116 NTSTATUS auth_system_user_info_dc(TALLOC_CTX *mem_ctx, const char *netbios_name,
 117                                  struct auth_user_info_dc **_user_info_dc)
 118 {
 119         struct auth_user_info_dc *user_info_dc;
 120         struct auth_user_info *info;
 121
 122         user_info_dc = talloc_zero(mem_ctx, struct auth_user_info_dc);
 123         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 124
 125         /* This returns a pointer to a struct dom_sid, which is the
 126          * same as a 1 element list of struct dom_sid */
 127         user_info_dc->num_sids = 1;
 128         user_info_dc->sids = talloc(user_info_dc, struct auth_SidAttr);
 129         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 130
 131         user_info_dc->sids->sid = global_sid_System;
 132         user_info_dc->sids->attrs = SE_GROUP_DEFAULT_FLAGS;
 133
 134         /* annoying, but the Anonymous really does have a session key,
 135            and it is all zeros! */
 136         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 137         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 138
 139         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 140         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 141
 142         data_blob_clear(&user_info_dc->user_session_key);
 143         data_blob_clear(&user_info_dc->lm_session_key);
 144
 145         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 146         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 147
 148         info->account_name = talloc_strdup(info, "SYSTEM");
 149         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 150
 151         info->domain_name = talloc_strdup(info, "NT AUTHORITY");
 152         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 153
 154         info->full_name = talloc_strdup(info, "System");
 155         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 156
 157         info->logon_script = talloc_strdup(info, "");
 158         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 159
 160         info->profile_path = talloc_strdup(info, "");
 161         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 162
 163         info->home_directory = talloc_strdup(info, "");
 164         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 165
 166         info->home_drive = talloc_strdup(info, "");
 167         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 168
 169         info->logon_server = talloc_strdup(info, netbios_name);
 170         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 171
 172         info->last_logon = 0;
 173         info->last_logoff = 0;
 174         info->acct_expiry = 0;
 175         info->last_password_change = 0;
 176         info->allow_password_change = 0;
 177         info->force_password_change = 0;
 178
 179         info->logon_count = 0;
 180         info->bad_password_count = 0;
 181
 182         info->acct_flags = ACB_NORMAL;
 183
 184         info->user_flags = 0;
 185
 186         *_user_info_dc = user_info_dc;
 187
 188         return NT_STATUS_OK;
 189 }
 190
 191
 192 static NTSTATUS auth_domain_admin_user_info_dc(TALLOC_CTX *mem_ctx,
 193                                               const char *netbios_name,
 194                                               const char *domain_name,
 195                                               struct dom_sid *domain_sid,
 196                                               struct auth_user_info_dc **_user_info_dc)
 197 {
 198         struct auth_user_info_dc *user_info_dc;
 199         struct auth_user_info *info;
 200
 201         user_info_dc = talloc_zero(mem_ctx, struct auth_user_info_dc);
 202         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 203
 204         user_info_dc->num_sids = 8;
 205         user_info_dc->sids = talloc_array(user_info_dc, struct auth_SidAttr, user_info_dc->num_sids);
 206
 207         user_info_dc->sids[PRIMARY_USER_SID_INDEX].sid = *domain_sid;
 208         sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX].sid, DOMAIN_RID_ADMINISTRATOR);
 209         user_info_dc->sids[PRIMARY_USER_SID_INDEX].attrs = SE_GROUP_DEFAULT_FLAGS;
 210
 211         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX].sid = *domain_sid;
 212         sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX].sid, DOMAIN_RID_USERS);
 213         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX].attrs = SE_GROUP_DEFAULT_FLAGS;
 214
 215         /* Add the primary group again. */
 216         user_info_dc->sids[2] = user_info_dc->sids[PRIMARY_GROUP_SID_INDEX];
 217
 218         user_info_dc->sids[3].sid = global_sid_Builtin_Administrators;
 219         user_info_dc->sids[3].attrs = SE_GROUP_DEFAULT_FLAGS;
 220
 221         user_info_dc->sids[4].sid = *domain_sid;
 222         sid_append_rid(&user_info_dc->sids[4].sid, DOMAIN_RID_ADMINS);
 223         user_info_dc->sids[4].attrs = SE_GROUP_DEFAULT_FLAGS;
 224         user_info_dc->sids[5].sid = *domain_sid;
 225         sid_append_rid(&user_info_dc->sids[5].sid, DOMAIN_RID_ENTERPRISE_ADMINS);
 226         user_info_dc->sids[5].attrs = SE_GROUP_DEFAULT_FLAGS;
 227         user_info_dc->sids[6].sid = *domain_sid;
 228         sid_append_rid(&user_info_dc->sids[6].sid, DOMAIN_RID_POLICY_ADMINS);
 229         user_info_dc->sids[6].attrs = SE_GROUP_DEFAULT_FLAGS;
 230         user_info_dc->sids[7].sid = *domain_sid;
 231         sid_append_rid(&user_info_dc->sids[7].sid, DOMAIN_RID_SCHEMA_ADMINS);
 232         user_info_dc->sids[7].attrs = SE_GROUP_DEFAULT_FLAGS;
 233
 234         /* What should the session key be?*/
 235         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 236         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 237
 238         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 239         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 240
 241         data_blob_clear(&user_info_dc->user_session_key);
 242         data_blob_clear(&user_info_dc->lm_session_key);
 243
 244         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 245         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 246
 247         info->account_name = talloc_strdup(info, "Administrator");
 248         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 249
 250         info->domain_name = talloc_strdup(info, domain_name);
 251         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 252
 253         info->full_name = talloc_strdup(info, "Administrator");
 254         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 255
 256         info->logon_script = talloc_strdup(info, "");
 257         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 258
 259         info->profile_path = talloc_strdup(info, "");
 260         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 261
 262         info->home_directory = talloc_strdup(info, "");
 263         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 264
 265         info->home_drive = talloc_strdup(info, "");
 266         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 267
 268         info->logon_server = talloc_strdup(info, netbios_name);
 269         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 270
 271         info->last_logon = 0;
 272         info->last_logoff = 0;
 273         info->acct_expiry = 0;
 274         info->last_password_change = 0;
 275         info->allow_password_change = 0;
 276         info->force_password_change = 0;
 277
 278         info->logon_count = 0;
 279         info->bad_password_count = 0;
 280
 281         info->acct_flags = ACB_NORMAL;
 282
 283         info->user_flags = 0;
 284
 285         *_user_info_dc = user_info_dc;
 286
 287         return NT_STATUS_OK;
 288 }
 289
 290 static NTSTATUS auth_domain_admin_session_info(TALLOC_CTX *parent_ctx,
 291                                                struct loadparm_context *lp_ctx,
 292                                                struct dom_sid *domain_sid,
 293                                                struct auth_session_info **session_info)
 294 {
 295         NTSTATUS nt_status;
 296         struct auth_user_info_dc *user_info_dc = NULL;
 297         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 298
 299         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
 300
 301         nt_status = auth_domain_admin_user_info_dc(mem_ctx, lpcfg_netbios_name(lp_ctx),
 302                                                   lpcfg_workgroup(lp_ctx), domain_sid,
 303                                                   &user_info_dc);
 304         if (!NT_STATUS_IS_OK(nt_status)) {
 305                 talloc_free(mem_ctx);
 306                 return nt_status;
 307         }
 308
 309         nt_status = auth_generate_session_info(mem_ctx, NULL, NULL, user_info_dc,
 310                                                AUTH_SESSION_INFO_SIMPLE_PRIVILEGES|AUTH_SESSION_INFO_AUTHENTICATED|AUTH_SESSION_INFO_DEFAULT_GROUPS,
 311                                                session_info);
 312         /* There is already a reference between the session_info and user_info_dc */
 313         if (NT_STATUS_IS_OK(nt_status)) {
 314                 talloc_steal(parent_ctx, *session_info);
 315         }
 316         talloc_free(mem_ctx);
 317         return nt_status;
 318 }
 319
 320 _PUBLIC_ struct auth_session_info *admin_session(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, struct dom_sid *domain_sid)
 321 {
 322         NTSTATUS nt_status;
 323         struct auth_session_info *session_info = NULL;
 324         nt_status = auth_domain_admin_session_info(mem_ctx,
 325                                                    lp_ctx,
 326                                                    domain_sid,
 327                                                    &session_info);
 328         if (!NT_STATUS_IS_OK(nt_status)) {
 329                 return NULL;
 330         }
 331         return session_info;
 332 }
 333
 334 _PUBLIC_ NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
 335                                               struct loadparm_context *lp_ctx,
 336                                               struct auth_session_info **_session_info)
 337 {
 338         NTSTATUS nt_status;
 339         struct auth_user_info_dc *user_info_dc = NULL;
 340         struct auth_session_info *session_info = NULL;
 341         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 342         bool ok;
 343
 344         nt_status = auth_anonymous_user_info_dc(mem_ctx,
 345                                                lpcfg_netbios_name(lp_ctx),
 346                                                &user_info_dc);
 347         if (!NT_STATUS_IS_OK(nt_status)) {
 348                 talloc_free(mem_ctx);
 349                 return nt_status;
 350         }
 351
 352         /* references the user_info_dc into the session_info */
 353         nt_status = auth_generate_session_info(parent_ctx, NULL, NULL, user_info_dc, AUTH_SESSION_INFO_SIMPLE_PRIVILEGES, &session_info);
 354         talloc_free(mem_ctx);
 355
 356         NT_STATUS_NOT_OK_RETURN(nt_status);
 357
 358         session_info->credentials = cli_credentials_init(session_info);
 359         if (!session_info->credentials) {
 360                 return NT_STATUS_NO_MEMORY;
 361         }
 362
 363         ok = cli_credentials_set_conf(session_info->credentials, lp_ctx);
 364         if (!ok) {
 365                 return NT_STATUS_INTERNAL_ERROR;
 366         }
 367         cli_credentials_set_anonymous(session_info->credentials);
 368
 369         *_session_info = session_info;
 370
 371         return NT_STATUS_OK;
 372 }
 373
 374 _PUBLIC_ NTSTATUS auth_anonymous_user_info_dc(TALLOC_CTX *mem_ctx,
 375                                     const char *netbios_name,
 376                                     struct auth_user_info_dc **_user_info_dc)
 377 {
 378         struct auth_user_info_dc *user_info_dc;
 379         struct auth_user_info *info;
 380         user_info_dc = talloc_zero(mem_ctx, struct auth_user_info_dc);
 381         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 382
 383         /* This returns a pointer to a struct dom_sid, which is the
 384          * same as a 1 element list of struct dom_sid */
 385         user_info_dc->num_sids = 1;
 386         user_info_dc->sids = talloc(user_info_dc, struct auth_SidAttr);
 387         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 388
 389         user_info_dc->sids->sid = global_sid_Anonymous;
 390         user_info_dc->sids->attrs = SE_GROUP_DEFAULT_FLAGS;
 391
 392         /* annoying, but the Anonymous really does have a session key... */
 393         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 394         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 395
 396         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 397         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 398
 399         /*  and it is all zeros! */
 400         data_blob_clear(&user_info_dc->user_session_key);
 401         data_blob_clear(&user_info_dc->lm_session_key);
 402
 403         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 404         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 405
 406         info->account_name = talloc_strdup(info, "ANONYMOUS LOGON");
 407         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 408
 409         info->domain_name = talloc_strdup(info, "NT AUTHORITY");
 410         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 411
 412         info->full_name = talloc_strdup(info, "Anonymous Logon");
 413         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 414
 415         info->logon_script = talloc_strdup(info, "");
 416         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 417
 418         info->profile_path = talloc_strdup(info, "");
 419         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 420
 421         info->home_directory = talloc_strdup(info, "");
 422         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 423
 424         info->home_drive = talloc_strdup(info, "");
 425         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 426
 427         info->logon_server = talloc_strdup(info, netbios_name);
 428         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 429
 430         info->last_logon = 0;
 431         info->last_logoff = 0;
 432         info->acct_expiry = 0;
 433         info->last_password_change = 0;
 434         info->allow_password_change = 0;
 435         info->force_password_change = 0;
 436
 437         info->logon_count = 0;
 438         info->bad_password_count = 0;
 439
 440         info->acct_flags = ACB_NORMAL;
 441
 442         /* The user is not authenticated. */
 443         info->user_flags = NETLOGON_GUEST;
 444
 445         *_user_info_dc = user_info_dc;
 446
 447         return NT_STATUS_OK;
 448 }
 449