source/sam/idmap_rid.c

   1 /*
   2  *  idmap_rid: static map between Active Directory/NT RIDs and RFC 2307 accounts
   3  *  Copyright (C) Guenther Deschner, 2004
   4  *  Copyright (C) Sumit Bose, 2004
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_IDMAP
  26
  27 NTSTATUS init_module(void);
  28
  29 struct dom_entry {
  30         fstring name;
  31         fstring sid;
  32         uint32 min_id;
  33         uint32 max_id;
  34 };
  35
  36 typedef struct trust_dom_array {
  37         int number;
  38         struct dom_entry *dom;
  39 } trust_dom_array;
  40
  41 static trust_dom_array trust;
  42
  43 static NTSTATUS rid_idmap_parse(const char *init_param,
  44                                 uint32 num_domains,
  45                                 fstring *domain_names,
  46                                 DOM_SID *domain_sids,
  47                                 uid_t u_low,
  48                                 uid_t u_high)
  49 {
  50         const char *p;
  51         int i;
  52         fstring sid_str;
  53         BOOL known_domain = False;
  54         fstring tok;
  55
  56         p = init_param;
  57         trust.number = 0;
  58
  59         /* falling back to automatic mapping when there were no options given */
  60         if (!*init_param) {
  61
  62                 DEBUG(3,("rid_idmap_parse: no domain list given or trusted domain-support deactivated, falling back to automatic mapping for own domain:\n"));
  63
  64                 sid_to_string(sid_str, &domain_sids[0]);
  65
  66                 fstrcpy(trust.dom[0].name, domain_names[0]);
  67                 fstrcpy(trust.dom[0].sid, sid_str);
  68                 trust.dom[0].min_id = u_low;
  69                 trust.dom[0].max_id = u_high;
  70                 trust.number = 1;
  71
  72                 DEBUGADD(3,("rid_idmap_parse:\tdomain: [%s], sid: [%s], range=[%d-%d]\n",
  73                                 trust.dom[0].name, trust.dom[0].sid, trust.dom[0].min_id, trust.dom[0].max_id));
  74                 return NT_STATUS_OK;
  75         }
  76
  77         /* scan through the init_param-list */
  78         while (next_token(&init_param, tok, LIST_SEP, sizeof(tok))) {
  79
  80                 p = tok;
  81                 DEBUG(3,("rid_idmap_parse: parsing entry: %d\n", trust.number));
  82
  83                 /* reinit sizes */
  84                 trust.dom = SMB_REALLOC_ARRAY(trust.dom, struct dom_entry,
  85                                               trust.number+1);
  86
  87                 if ( trust.dom == NULL ) {
  88                         return NT_STATUS_NO_MEMORY;
  89                 }
  90
  91                 if (!next_token(&p, tok, "=", sizeof(tok))) {
  92                         DEBUG(0, ("rid_idmap_parse: no '=' sign found in domain list [%s]\n", init_param));
  93                         return NT_STATUS_UNSUCCESSFUL;
  94                 }
  95
  96                 /* add the name */
  97                 fstrcpy(trust.dom[trust.number].name, tok);
  98                 DEBUGADD(3,("rid_idmap_parse:\tentry %d has name: [%s]\n", trust.number, trust.dom[trust.number].name));
  99
 100                 /* add the domain-sid */
 101                 for (i=0; i<num_domains; i++) {
 102
 103                         known_domain = False;
 104
 105                         if (strequal(domain_names[i], trust.dom[trust.number].name)) {
 106
 107                                 sid_to_string(sid_str, &domain_sids[i]);
 108                                 fstrcpy(trust.dom[trust.number].sid, sid_str);
 109
 110                                 DEBUGADD(3,("rid_idmap_parse:\tentry %d has sid: [%s]\n", trust.number, trust.dom[trust.number].sid));
 111                                 known_domain = True;
 112                                 break;
 113                         }
 114                 }
 115
 116                 if (!known_domain) {
 117                         DEBUG(0,("rid_idmap_parse: your DC does not know anything about domain: [%s]\n", trust.dom[trust.number].name));
 118                         return NT_STATUS_INVALID_PARAMETER;
 119                 }
 120
 121                 if (!next_token(&p, tok, "-", sizeof(tok))) {
 122                         DEBUG(0,("rid_idmap_parse: no mapping-range defined\n"));
 123                         return NT_STATUS_INVALID_PARAMETER;
 124                 }
 125
 126                 /* add min_id */
 127                 trust.dom[trust.number].min_id = atoi(tok);
 128                 DEBUGADD(3,("rid_idmap_parse:\tentry %d has min_id: [%d]\n", trust.number, trust.dom[trust.number].min_id));
 129
 130                 /* add max_id */
 131                 trust.dom[trust.number].max_id = atoi(p);
 132                 DEBUGADD(3,("rid_idmap_parse:\tentry %d has max_id: [%d]\n", trust.number, trust.dom[trust.number].max_id));
 133
 134                 trust.number++;
 135         }
 136
 137         return NT_STATUS_OK;
 138
 139 }
 140
 141 static NTSTATUS rid_idmap_get_domains(uint32 *num_domains, fstring **domain_names, DOM_SID **domain_sids)
 142 {
 143         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 144         struct cli_state *cli;
 145         TALLOC_CTX *mem_ctx;
 146         POLICY_HND pol;
 147         uint32 des_access = SEC_RIGHTS_MAXIMUM_ALLOWED;
 148         fstring dc_name;
 149         struct in_addr dc_ip;
 150         const char *password = NULL;
 151         const char *username = NULL;
 152         const char *domain = NULL;
 153         uint32 info_class = 5;
 154         char *domain_name = NULL;
 155         DOM_SID *domain_sid, sid;
 156         fstring sid_str;
 157         int i;
 158         uint32 trusted_num_domains = 0;
 159         char **trusted_domain_names;
 160         DOM_SID *trusted_domain_sids;
 161         uint32 enum_ctx = 0;
 162         int own_domains = 2;
 163
 164         /* put the results together */
 165         *num_domains = 2;
 166         *domain_names = SMB_MALLOC_ARRAY(fstring, *num_domains);
 167         *domain_sids = SMB_MALLOC_ARRAY(DOM_SID, *num_domains);
 168
 169         /* avoid calling a DC when trusted domains are not allowed anyway */
 170         if (!lp_allow_trusted_domains()) {
 171
 172                 fstrcpy((*domain_names)[0], lp_workgroup());
 173                 if (!secrets_fetch_domain_sid(lp_workgroup(), &sid)) {
 174                         DEBUG(0,("rid_idmap_get_domains: failed to retrieve domain sid\n"));
 175                         return status;
 176                 }
 177                 sid_copy(&(*domain_sids)[0], &sid);
 178
 179                 /* add BUILTIN */
 180                 fstrcpy((*domain_names)[1], "BUILTIN");
 181                 sid_copy(&(*domain_sids)[1], &global_sid_Builtin);
 182
 183                 return NT_STATUS_OK;
 184         }
 185
 186         /* create mem_ctx */
 187         if (!(mem_ctx = talloc_init("rid_idmap_get_trusted_domains"))) {
 188                 DEBUG(0, ("rid_idmap_get_domains: talloc_init() failed\n"));
 189                 return NT_STATUS_NO_MEMORY;
 190         }
 191
 192         if (!get_dc_name(lp_workgroup(), 0, dc_name, &dc_ip)) {
 193                 DEBUG(1, ("rid_idmap_get_domains: could not get dc-name\n"));
 194                 return NT_STATUS_UNSUCCESSFUL;
 195         }
 196
 197         /* open a connection to the dc */
 198         username = secrets_fetch(SECRETS_AUTH_USER, NULL);
 199         password = secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
 200         domain =   secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
 201
 202         if (username) {
 203
 204                 if (!domain)
 205                         domain = smb_xstrdup(lp_workgroup());
 206
 207                 if (!password)
 208                         password = smb_xstrdup("");
 209
 210                 DEBUG(3, ("rid_idmap_get_domains: IPC$ connections done by user %s\\%s\n", domain, username));
 211
 212         } else {
 213
 214                 DEBUG(3, ("rid_idmap_get_domains: IPC$ connections done anonymously\n"));
 215                 username = "";
 216                 domain = "";
 217                 password = "";
 218         }
 219
 220         DEBUG(10, ("rid_idmap_get_domains: opening connection to [%s]\n", dc_name));
 221
 222         status = cli_full_connection(&cli, global_myname(), dc_name,
 223                         NULL, 0,
 224                         "IPC$", "IPC",
 225                         username,
 226                         lp_workgroup(),
 227                         password,
 228                         CLI_FULL_CONNECTION_ANNONYMOUS_FALLBACK, True, NULL);
 229
 230         if (!NT_STATUS_IS_OK(status)) {
 231                 DEBUG(1, ("rid_idmap_get_domains: could not setup connection to dc\n"));
 232                 return status;
 233         }
 234
 235         /* query the lsa-pipe */
 236         if (!cli_nt_session_open (cli, PI_LSARPC)) {
 237                 DEBUG(1, ("rid_idmap_get_domains: could not setup connection to dc\n"));
 238                 goto out;
 239         }
 240
 241         /* query policies */
 242         status = cli_lsa_open_policy(cli, mem_ctx, False, des_access, &pol);
 243         if (!NT_STATUS_IS_OK(status)) {
 244                 goto out;
 245         }
 246
 247         status = cli_lsa_query_info_policy(cli, mem_ctx, &pol, info_class, &domain_name, &domain_sid);
 248         if (!NT_STATUS_IS_OK(status)) {
 249                 DEBUG(1, ("rid_idmap_get_domains: cannot retrieve domain-info\n"));
 250                 goto out;
 251         }
 252
 253         sid_to_string(sid_str, domain_sid);
 254         DEBUG(10,("rid_idmap_get_domains: my domain: [%s], sid: [%s]\n", domain_name, sid_str));
 255
 256         /* scan trusted domains */
 257         DEBUG(10, ("rid_idmap_get_domains: enumerating trusted domains\n"));
 258         status = cli_lsa_enum_trust_dom(cli, mem_ctx, &pol, &enum_ctx,
 259                         &trusted_num_domains,
 260                         &trusted_domain_names,
 261                         &trusted_domain_sids);
 262
 263         if (!NT_STATUS_IS_OK(status) &&
 264             !NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES) &&
 265             !NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 266                 DEBUG(1, ("rid_idmap_get_domains: could not enumerate trusted domains\n"));
 267                 goto out;
 268         }
 269
 270         /* show trusted domains */
 271         DEBUG(10,("rid_idmap_get_domains: scan for trusted domains gave %d results:\n", trusted_num_domains));
 272         for (i=0; i<trusted_num_domains; i++) {
 273                 sid_to_string(sid_str, &trusted_domain_sids[i]);
 274                 DEBUGADD(10,("rid_idmap_get_domains:\t#%d\tDOMAIN: [%s], SID: [%s]\n",
 275                                         i, trusted_domain_names[i], sid_str));
 276         }
 277
 278         if (!sid_equal(domain_sid, get_global_sam_sid()))
 279                 ++own_domains;
 280
 281         /* put the results together */
 282         *num_domains = trusted_num_domains + own_domains;
 283         *domain_names = SMB_REALLOC_ARRAY(*domain_names, fstring,
 284                                           *num_domains);
 285         *domain_sids = SMB_REALLOC_ARRAY(*domain_sids, DOM_SID, *num_domains);
 286
 287         /* first add mydomain */
 288         fstrcpy((*domain_names)[0], domain_name);
 289         sid_copy(&(*domain_sids)[0], domain_sid);
 290
 291         /* then add BUILTIN */
 292         fstrcpy((*domain_names)[1], "BUILTIN");
 293         sid_copy(&(*domain_sids)[1], &global_sid_Builtin);
 294
 295         /* then add my local sid */
 296         if (!sid_equal(domain_sid, get_global_sam_sid())) {
 297                 fstrcpy((*domain_names)[2], global_myname());
 298                 sid_copy(&(*domain_sids)[2], get_global_sam_sid());
 299         }
 300
 301         /* add trusted domains */
 302         for (i=0; i<trusted_num_domains; i++) {
 303                 fstrcpy((*domain_names)[i+own_domains], trusted_domain_names[i]);
 304                 sid_copy(&((*domain_sids)[i+own_domains]), &(trusted_domain_sids[i]));
 305         }
 306
 307         /* show complete domain list */
 308         DEBUG(5,("rid_idmap_get_domains: complete domain-list has %d entries:\n", *num_domains));
 309         for (i=0; i<*num_domains; i++) {
 310                 sid_to_string(sid_str, &((*domain_sids)[i]));
 311                 DEBUGADD(5,("rid_idmap_get_domains:\t#%d\tdomain: [%s], sid: [%s]\n",
 312                                         i, (*domain_names)[i], sid_str ));
 313         }
 314
 315         status = NT_STATUS_OK;
 316
 317 out:
 318         cli_lsa_close(cli, mem_ctx, &pol);
 319         cli_nt_session_close(cli);
 320         talloc_destroy(mem_ctx);
 321         cli_shutdown(cli);
 322
 323         return status;
 324 }
 325
 326 static NTSTATUS rid_idmap_init(char *init_param)
 327 {
 328         int i, j;
 329         uid_t u_low, u_high;
 330         gid_t g_low, g_high;
 331         uint32 num_domains = 0;
 332         fstring *domain_names;
 333         DOM_SID *domain_sids;
 334         NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
 335         trust.dom = NULL;
 336
 337         /* basic sanity checks */
 338         if (!lp_idmap_uid(&u_low, &u_high) || !lp_idmap_gid(&g_low, &g_high)) {
 339                 DEBUG(0, ("rid_idmap_init: cannot get required global idmap-ranges.\n"));
 340                 return nt_status;
 341         }
 342
 343         if (u_low != g_low || u_high != g_high) {
 344                 DEBUG(0, ("rid_idmap_init: range defined in \"idmap uid\" must match range of \"idmap gid\".\n"));
 345                 return nt_status;
 346         }
 347
 348         if (lp_allow_trusted_domains()) {
 349 #if IDMAP_RID_SUPPORT_TRUSTED_DOMAINS
 350                 DEBUG(3,("rid_idmap_init: enabling trusted-domain-mapping\n"));
 351 #else
 352                 DEBUG(0,("rid_idmap_init: idmap_rid does not work with trusted domains\n"));
 353                 DEBUGADD(0,("rid_idmap_init: please set \"allow trusted domains\" to \"no\" when using idmap_rid\n"));
 354                 return nt_status;
 355 #endif
 356         }
 357
 358         /* init sizes */
 359         trust.dom = SMB_MALLOC_P(struct dom_entry);
 360         if (trust.dom == NULL) {
 361                 return NT_STATUS_NO_MEMORY;
 362         }
 363
 364         /* retrieve full domain list */
 365         nt_status = rid_idmap_get_domains(&num_domains, &domain_names, &domain_sids);
 366         if (!NT_STATUS_IS_OK(nt_status) &&
 367             !NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_MORE_ENTRIES) &&
 368             !NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES)) {
 369                 DEBUG(0, ("rid_idmap_init: cannot fetch sids for domain and/or trusted-domains from domain-controller.\n"));
 370                 return nt_status;
 371         }
 372
 373         /* parse the init string */
 374         nt_status = rid_idmap_parse(init_param, num_domains, domain_names, domain_sids, u_low, u_high);
 375         if (!NT_STATUS_IS_OK(nt_status)) {
 376                 DEBUG(0, ("rid_idmap_init: cannot parse module-configuration\n"));
 377                 goto out;
 378         }
 379
 380         nt_status = NT_STATUS_INVALID_PARAMETER;
 381
 382         /* some basic sanity checks */
 383         for (i=0; i<trust.number; i++) {
 384
 385                 if (trust.dom[i].min_id > trust.dom[i].max_id) {
 386                         DEBUG(0, ("rid_idmap_init: min_id (%d) has to be smaller than max_id (%d) for domain [%s]\n",
 387                                                 trust.dom[i].min_id, trust.dom[i].max_id, trust.dom[i].name));
 388                         goto out;
 389                 }
 390
 391                 if (trust.dom[i].min_id < u_low || trust.dom[i].max_id > u_high) {
 392                         DEBUG(0, ("rid_idmap_init: mapping of domain [%s] (%d-%d) has to fit into global idmap range (%d-%d).\n",
 393                                                 trust.dom[i].name, trust.dom[i].min_id, trust.dom[i].max_id, u_low, u_high));
 394                         goto out;
 395                 }
 396         }
 397
 398         /* check for overlaps */
 399         for (i=0; i<trust.number-1; i++) {
 400                 for (j=i+1; j<trust.number; j++) {
 401                         if (trust.dom[i].min_id <= trust.dom[j].max_id && trust.dom[j].min_id <= trust.dom[i].max_id) {
 402                                 DEBUG(0, ("rid_idmap_init: the ranges of domain [%s] and [%s] overlap\n",
 403                                                         trust.dom[i+1].name, trust.dom[i].name));
 404                                 goto out;
 405                         }
 406                 }
 407         }
 408
 409         DEBUG(3, ("rid_idmap_init: using %d mappings:\n", trust.number));
 410         for (i=0; i<trust.number; i++) {
 411                 DEBUGADD(3, ("rid_idmap_init:\tdomain: [%s], sid: [%s], min_id: [%d], max_id: [%d]\n",
 412                                 trust.dom[i].name, trust.dom[i].sid, trust.dom[i].min_id, trust.dom[i].max_id));
 413         }
 414
 415         nt_status = NT_STATUS_OK;
 416
 417 out:
 418         SAFE_FREE(domain_names);
 419         SAFE_FREE(domain_sids);
 420
 421         return nt_status;
 422 }
 423
 424 static NTSTATUS rid_idmap_get_sid_from_id(DOM_SID *sid, unid_t unid, int id_type)
 425 {
 426         fstring sid_string;
 427         int i;
 428         DOM_SID sidstr;
 429
 430         /* find range */
 431         for (i=0; i<trust.number; i++) {
 432                 if (trust.dom[i].min_id <= unid.uid && trust.dom[i].max_id >= unid.uid )
 433                         break;
 434         }
 435
 436         if (i == trust.number) {
 437                 DEBUG(0,("rid_idmap_get_sid_from_id: no suitable range available for id: %d\n", unid.uid));
 438                 return NT_STATUS_INVALID_PARAMETER;
 439         }
 440
 441         /* use lower-end of idmap-range as offset for users and groups*/
 442         unid.uid -= trust.dom[i].min_id;
 443
 444         if (!trust.dom[i].sid)
 445                 return NT_STATUS_INVALID_PARAMETER;
 446
 447         string_to_sid(&sidstr, trust.dom[i].sid);
 448         sid_copy(sid, &sidstr);
 449         if (!sid_append_rid( sid, (unsigned long)unid.uid )) {
 450                 DEBUG(0,("rid_idmap_get_sid_from_id: could not append rid to domain sid\n"));
 451                 return NT_STATUS_NO_MEMORY;
 452         }
 453
 454         DEBUG(3, ("rid_idmap_get_sid_from_id: mapped POSIX %s %d to SID [%s]\n",
 455                 (id_type == ID_GROUPID) ? "GID" : "UID", unid.uid,
 456                 sid_to_string(sid_string, sid)));
 457
 458         return NT_STATUS_OK;
 459 }
 460
 461 static NTSTATUS rid_idmap_get_id_from_sid(unid_t *unid, int *id_type, const DOM_SID *sid)
 462 {
 463         fstring sid_string;
 464         int i;
 465         uint32 rid;
 466         DOM_SID sidstr;
 467
 468         /* check if we have a mapping for the sid */
 469         for (i=0; i<trust.number; i++) {
 470                 if (!trust.dom[i].sid) {
 471                         return NT_STATUS_INVALID_PARAMETER;
 472                 }
 473                 string_to_sid(&sidstr, trust.dom[i].sid);
 474                 if ( sid_compare_domain(sid, &sidstr) == 0 )
 475                         break;
 476         }
 477
 478         if (i == trust.number) {
 479                 DEBUG(0,("rid_idmap_get_id_from_sid: no suitable range available for sid: %s\n",
 480                         sid_string_static(sid)));
 481                 return NT_STATUS_INVALID_PARAMETER;
 482         }
 483
 484         if (!sid_peek_rid(sid, &rid)) {
 485                 DEBUG(0,("rid_idmap_get_id_from_sid: could not peek rid\n"));
 486                 return NT_STATUS_INVALID_PARAMETER;
 487         }
 488
 489         /* use lower-end of idmap-range as offset for users and groups */
 490         unid->uid = rid + trust.dom[i].min_id;
 491
 492         if (unid->uid > trust.dom[i].max_id) {
 493                 DEBUG(0,("rid_idmap_get_id_from_sid: rid: %d (%s: %d) too high for mapping of domain: %s (%d-%d)\n",
 494                         rid, (*id_type == ID_GROUPID) ? "GID" : "UID", unid->uid, trust.dom[i].name,
 495                         trust.dom[i].min_id, trust.dom[i].max_id));
 496                 return NT_STATUS_INVALID_PARAMETER;
 497         }
 498         if (unid->uid < trust.dom[i].min_id) {
 499                 DEBUG(0,("rid_idmap_get_id_from_sid: rid: %d (%s: %d) too low for mapping of domain: %s (%d-%d)\n",
 500                         rid, (*id_type == ID_GROUPID) ? "GID" : "UID", unid->uid,
 501                         trust.dom[i].name, trust.dom[i].min_id, trust.dom[i].max_id));
 502                 return NT_STATUS_INVALID_PARAMETER;
 503         }
 504
 505         DEBUG(3,("rid_idmap_get_id_from_sid: mapped SID [%s] to POSIX %s %d\n",
 506                 sid_to_string(sid_string, sid),
 507                 (*id_type == ID_GROUPID) ? "GID" : "UID", unid->uid));
 508
 509         return NT_STATUS_OK;
 510
 511 }
 512
 513 static NTSTATUS rid_idmap_set_mapping(const DOM_SID *sid, unid_t id, int id_type)
 514 {
 515         return NT_STATUS_NOT_IMPLEMENTED;
 516 }
 517
 518 static NTSTATUS rid_idmap_close(void)
 519 {
 520         SAFE_FREE(trust.dom);
 521
 522         return NT_STATUS_OK;
 523 }
 524
 525 static NTSTATUS rid_idmap_allocate_rid(uint32 *rid, int rid_type)
 526 {
 527         return NT_STATUS_NOT_IMPLEMENTED;
 528 }
 529
 530 static NTSTATUS rid_idmap_allocate_id(unid_t *id, int id_type)
 531 {
 532         return NT_STATUS_NOT_IMPLEMENTED;
 533 }
 534
 535 static void rid_idmap_status(void)
 536 {
 537         DEBUG(0, ("RID IDMAP Status not available\n"));
 538 }
 539
 540 static struct idmap_methods rid_methods = {
 541         rid_idmap_init,
 542         rid_idmap_allocate_rid,
 543         rid_idmap_allocate_id,
 544         rid_idmap_get_sid_from_id,
 545         rid_idmap_get_id_from_sid,
 546         rid_idmap_set_mapping,
 547         rid_idmap_close,
 548         rid_idmap_status
 549 };
 550
 551 NTSTATUS init_module(void)
 552 {
 553         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "idmap_rid", &rid_methods);
 554         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "rid", &rid_methods);
 555 }
 556