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(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 = dom_sid_dup(user_info_dc, &global_sid_System);
 129         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 130
 131         /* annoying, but the Anonymous really does have a session key,
 132            and it is all zeros! */
 133         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 134         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 135
 136         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 137         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 138
 139         data_blob_clear(&user_info_dc->user_session_key);
 140         data_blob_clear(&user_info_dc->lm_session_key);
 141
 142         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 143         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 144
 145         info->account_name = talloc_strdup(info, "SYSTEM");
 146         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 147
 148         info->domain_name = talloc_strdup(info, "NT AUTHORITY");
 149         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 150
 151         info->full_name = talloc_strdup(info, "System");
 152         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 153
 154         info->logon_script = talloc_strdup(info, "");
 155         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 156
 157         info->profile_path = talloc_strdup(info, "");
 158         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 159
 160         info->home_directory = talloc_strdup(info, "");
 161         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 162
 163         info->home_drive = talloc_strdup(info, "");
 164         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 165
 166         info->logon_server = talloc_strdup(info, netbios_name);
 167         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 168
 169         info->last_logon = 0;
 170         info->last_logoff = 0;
 171         info->acct_expiry = 0;
 172         info->last_password_change = 0;
 173         info->allow_password_change = 0;
 174         info->force_password_change = 0;
 175
 176         info->logon_count = 0;
 177         info->bad_password_count = 0;
 178
 179         info->acct_flags = ACB_NORMAL;
 180
 181         info->authenticated = true;
 182
 183         *_user_info_dc = user_info_dc;
 184
 185         return NT_STATUS_OK;
 186 }
 187
 188
 189 static NTSTATUS auth_domain_admin_user_info_dc(TALLOC_CTX *mem_ctx,
 190                                               const char *netbios_name,
 191                                               const char *domain_name,
 192                                               struct dom_sid *domain_sid,
 193                                               struct auth_user_info_dc **_user_info_dc)
 194 {
 195         struct auth_user_info_dc *user_info_dc;
 196         struct auth_user_info *info;
 197
 198         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 199         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 200
 201         user_info_dc->num_sids = 7;
 202         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid, user_info_dc->num_sids);
 203
 204         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *domain_sid;
 205         sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], DOMAIN_RID_ADMINISTRATOR);
 206
 207         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *domain_sid;
 208         sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], DOMAIN_RID_USERS);
 209
 210         user_info_dc->sids[2] = global_sid_Builtin_Administrators;
 211
 212         user_info_dc->sids[3] = *domain_sid;
 213         sid_append_rid(&user_info_dc->sids[3], DOMAIN_RID_ADMINS);
 214         user_info_dc->sids[4] = *domain_sid;
 215         sid_append_rid(&user_info_dc->sids[4], DOMAIN_RID_ENTERPRISE_ADMINS);
 216         user_info_dc->sids[5] = *domain_sid;
 217         sid_append_rid(&user_info_dc->sids[5], DOMAIN_RID_POLICY_ADMINS);
 218         user_info_dc->sids[6] = *domain_sid;
 219         sid_append_rid(&user_info_dc->sids[6], DOMAIN_RID_SCHEMA_ADMINS);
 220
 221         /* What should the session key be?*/
 222         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 223         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 224
 225         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 226         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 227
 228         data_blob_clear(&user_info_dc->user_session_key);
 229         data_blob_clear(&user_info_dc->lm_session_key);
 230
 231         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 232         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 233
 234         info->account_name = talloc_strdup(info, "Administrator");
 235         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 236
 237         info->domain_name = talloc_strdup(info, domain_name);
 238         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 239
 240         info->full_name = talloc_strdup(info, "Administrator");
 241         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 242
 243         info->logon_script = talloc_strdup(info, "");
 244         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 245
 246         info->profile_path = talloc_strdup(info, "");
 247         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 248
 249         info->home_directory = talloc_strdup(info, "");
 250         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 251
 252         info->home_drive = talloc_strdup(info, "");
 253         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 254
 255         info->logon_server = talloc_strdup(info, netbios_name);
 256         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 257
 258         info->last_logon = 0;
 259         info->last_logoff = 0;
 260         info->acct_expiry = 0;
 261         info->last_password_change = 0;
 262         info->allow_password_change = 0;
 263         info->force_password_change = 0;
 264
 265         info->logon_count = 0;
 266         info->bad_password_count = 0;
 267
 268         info->acct_flags = ACB_NORMAL;
 269
 270         info->authenticated = true;
 271
 272         *_user_info_dc = user_info_dc;
 273
 274         return NT_STATUS_OK;
 275 }
 276
 277 static NTSTATUS auth_domain_admin_session_info(TALLOC_CTX *parent_ctx,
 278                                                struct loadparm_context *lp_ctx,
 279                                                struct dom_sid *domain_sid,
 280                                                struct auth_session_info **session_info)
 281 {
 282         NTSTATUS nt_status;
 283         struct auth_user_info_dc *user_info_dc = NULL;
 284         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 285
 286         NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
 287
 288         nt_status = auth_domain_admin_user_info_dc(mem_ctx, lpcfg_netbios_name(lp_ctx),
 289                                                   lpcfg_workgroup(lp_ctx), domain_sid,
 290                                                   &user_info_dc);
 291         if (!NT_STATUS_IS_OK(nt_status)) {
 292                 talloc_free(mem_ctx);
 293                 return nt_status;
 294         }
 295
 296         nt_status = auth_generate_session_info(mem_ctx, NULL, NULL, user_info_dc,
 297                                                AUTH_SESSION_INFO_SIMPLE_PRIVILEGES|AUTH_SESSION_INFO_AUTHENTICATED|AUTH_SESSION_INFO_DEFAULT_GROUPS,
 298                                                session_info);
 299         /* There is already a reference between the sesion_info and user_info_dc */
 300         if (NT_STATUS_IS_OK(nt_status)) {
 301                 talloc_steal(parent_ctx, *session_info);
 302         }
 303         talloc_free(mem_ctx);
 304         return nt_status;
 305 }
 306
 307 _PUBLIC_ struct auth_session_info *admin_session(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, struct dom_sid *domain_sid)
 308 {
 309         NTSTATUS nt_status;
 310         struct auth_session_info *session_info = NULL;
 311         nt_status = auth_domain_admin_session_info(mem_ctx,
 312                                                    lp_ctx,
 313                                                    domain_sid,
 314                                                    &session_info);
 315         if (!NT_STATUS_IS_OK(nt_status)) {
 316                 return NULL;
 317         }
 318         return session_info;
 319 }
 320
 321 _PUBLIC_ NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
 322                                               struct loadparm_context *lp_ctx,
 323                                               struct auth_session_info **_session_info)
 324 {
 325         NTSTATUS nt_status;
 326         struct auth_user_info_dc *user_info_dc = NULL;
 327         struct auth_session_info *session_info = NULL;
 328         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 329         bool ok;
 330
 331         nt_status = auth_anonymous_user_info_dc(mem_ctx,
 332                                                lpcfg_netbios_name(lp_ctx),
 333                                                &user_info_dc);
 334         if (!NT_STATUS_IS_OK(nt_status)) {
 335                 talloc_free(mem_ctx);
 336                 return nt_status;
 337         }
 338
 339         /* references the user_info_dc into the session_info */
 340         nt_status = auth_generate_session_info(parent_ctx, NULL, NULL, user_info_dc, AUTH_SESSION_INFO_SIMPLE_PRIVILEGES, &session_info);
 341         talloc_free(mem_ctx);
 342
 343         NT_STATUS_NOT_OK_RETURN(nt_status);
 344
 345         session_info->credentials = cli_credentials_init(session_info);
 346         if (!session_info->credentials) {
 347                 return NT_STATUS_NO_MEMORY;
 348         }
 349
 350         ok = cli_credentials_set_conf(session_info->credentials, lp_ctx);
 351         if (!ok) {
 352                 return NT_STATUS_INTERNAL_ERROR;
 353         }
 354         cli_credentials_set_anonymous(session_info->credentials);
 355
 356         *_session_info = session_info;
 357
 358         return NT_STATUS_OK;
 359 }
 360
 361 _PUBLIC_ NTSTATUS auth_anonymous_user_info_dc(TALLOC_CTX *mem_ctx,
 362                                     const char *netbios_name,
 363                                     struct auth_user_info_dc **_user_info_dc)
 364 {
 365         struct auth_user_info_dc *user_info_dc;
 366         struct auth_user_info *info;
 367         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
 368         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
 369
 370         /* This returns a pointer to a struct dom_sid, which is the
 371          * same as a 1 element list of struct dom_sid */
 372         user_info_dc->num_sids = 1;
 373         user_info_dc->sids = dom_sid_dup(user_info_dc, &global_sid_Anonymous);
 374         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
 375
 376         /* annoying, but the Anonymous really does have a session key... */
 377         user_info_dc->user_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 378         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
 379
 380         user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, NULL, 16);
 381         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
 382
 383         /*  and it is all zeros! */
 384         data_blob_clear(&user_info_dc->user_session_key);
 385         data_blob_clear(&user_info_dc->lm_session_key);
 386
 387         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
 388         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
 389
 390         info->account_name = talloc_strdup(info, "ANONYMOUS LOGON");
 391         NT_STATUS_HAVE_NO_MEMORY(info->account_name);
 392
 393         info->domain_name = talloc_strdup(info, "NT AUTHORITY");
 394         NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 395
 396         info->full_name = talloc_strdup(info, "Anonymous Logon");
 397         NT_STATUS_HAVE_NO_MEMORY(info->full_name);
 398
 399         info->logon_script = talloc_strdup(info, "");
 400         NT_STATUS_HAVE_NO_MEMORY(info->logon_script);
 401
 402         info->profile_path = talloc_strdup(info, "");
 403         NT_STATUS_HAVE_NO_MEMORY(info->profile_path);
 404
 405         info->home_directory = talloc_strdup(info, "");
 406         NT_STATUS_HAVE_NO_MEMORY(info->home_directory);
 407
 408         info->home_drive = talloc_strdup(info, "");
 409         NT_STATUS_HAVE_NO_MEMORY(info->home_drive);
 410
 411         info->logon_server = talloc_strdup(info, netbios_name);
 412         NT_STATUS_HAVE_NO_MEMORY(info->logon_server);
 413
 414         info->last_logon = 0;
 415         info->last_logoff = 0;
 416         info->acct_expiry = 0;
 417         info->last_password_change = 0;
 418         info->allow_password_change = 0;
 419         info->force_password_change = 0;
 420
 421         info->logon_count = 0;
 422         info->bad_password_count = 0;
 423
 424         info->acct_flags = ACB_NORMAL;
 425
 426         info->authenticated = false;
 427
 428         *_user_info_dc = user_info_dc;
 429
 430         return NT_STATUS_OK;
 431 }
 432