source3/passdb/pdb_wbc_sam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Password and authentication handling by wbclient
   5
   6    Copyright (C) Andrew Bartlett                        2002
   7    Copyright (C) Jelmer Vernooij                        2002
   8    Copyright (C) Simo Sorce                             2003
   9    Copyright (C) Volker Lendecke                        2006
  10    Copyright (C) Dan Sledz                              2009
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 /* This passdb module retrieves full passdb information for local users and
  27  * groups from a wbclient compatible daemon.
  28  *
  29  * The purpose of this module is to defer all SAM authorization information
  30  * storage and retrieval to a wbc compatible daemon.
  31  *
  32  * This passdb backend is most useful when used in conjunction with auth_wbc.
  33  *
  34  * A few current limitations of this module are:
  35  *   - read only interface
  36  *   - no privileges
  37  */
  38
  39 #include "includes.h"
  40
  41 /***************************************************************************
  42   Default implementations of some functions.
  43  ****************************************************************************/
  44 static NTSTATUS _pdb_wbc_sam_getsampw(struct pdb_methods *methods,
  45                                        struct samu *user,
  46                                        const struct passwd *pwd)
  47 {
  48         NTSTATUS result = NT_STATUS_OK;
  49
  50         if (pwd == NULL)
  51                 return NT_STATUS_NO_SUCH_USER;
  52
  53         memset(user, 0, sizeof(user));
  54
  55         /* Can we really get away with this little of information */
  56         user->methods = methods;
  57         result = samu_set_unix(user, pwd);
  58
  59         return result;
  60 }
  61
  62 static NTSTATUS pdb_wbc_sam_getsampwnam(struct pdb_methods *methods, struct samu *user, const char *sname)
  63 {
  64         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwnam(sname));
  65 }
  66
  67 static NTSTATUS pdb_wbc_sam_getsampwsid(struct pdb_methods *methods, struct samu *user, const DOM_SID *sid)
  68 {
  69         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwsid(sid));
  70 }
  71
  72 static bool pdb_wbc_sam_uid_to_sid(struct pdb_methods *methods, uid_t uid,
  73                                    DOM_SID *sid)
  74 {
  75         return winbind_uid_to_sid(sid, uid);
  76 }
  77
  78 static bool pdb_wbc_sam_gid_to_sid(struct pdb_methods *methods, gid_t gid,
  79                                    DOM_SID *sid)
  80 {
  81         return winbind_gid_to_sid(sid, gid);
  82 }
  83
  84 static bool pdb_wbc_sam_sid_to_id(struct pdb_methods *methods,
  85                                   const DOM_SID *sid,
  86                                   union unid_t *id, enum lsa_SidType *type)
  87 {
  88         if (winbind_sid_to_uid(&id->uid, sid)) {
  89                 *type = SID_NAME_USER;
  90         } else if (winbind_sid_to_gid(&id->gid, sid)) {
  91                 /* We assume all gids are groups, not aliases */
  92                 *type = SID_NAME_DOM_GRP;
  93         } else {
  94                 return false;
  95         }
  96
  97         return true;
  98 }
  99
 100 static NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
 101                                                TALLOC_CTX *mem_ctx,
 102                                                const DOM_SID *group,
 103                                                uint32 **pp_member_rids,
 104                                                size_t *p_num_members)
 105 {
 106         return NT_STATUS_NOT_IMPLEMENTED;
 107 }
 108
 109 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
 110                                                    TALLOC_CTX *mem_ctx,
 111                                                    struct samu *user,
 112                                                    DOM_SID **pp_sids,
 113                                                    gid_t **pp_gids,
 114                                                    size_t *p_num_groups)
 115 {
 116         size_t i;
 117         const char *username = pdb_get_username(user);
 118         uint32_t num_groups;
 119
 120         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 121                 return NT_STATUS_NO_SUCH_USER;
 122         }
 123         *p_num_groups = num_groups;
 124
 125         if (*p_num_groups == 0) {
 126                 smb_panic("primary group missing");
 127         }
 128
 129         *pp_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *p_num_groups);
 130
 131         if (*pp_sids == NULL) {
 132                 TALLOC_FREE(*pp_gids);
 133                 return NT_STATUS_NO_MEMORY;
 134         }
 135
 136         for (i=0; i < *p_num_groups; i++) {
 137                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 138         }
 139
 140         return NT_STATUS_OK;
 141 }
 142
 143 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 144                                         const DOM_SID *domain_sid,
 145                                         int num_rids,
 146                                         uint32 *rids,
 147                                         const char **names,
 148                                         enum lsa_SidType *attrs)
 149 {
 150         NTSTATUS result = NT_STATUS_OK;
 151         char *domain = NULL;
 152         char **account_names = NULL;
 153         enum lsa_SidType *attr_list = NULL;
 154         int i;
 155
 156         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 157                                  (const char **)&domain,
 158                                  (const char ***)&account_names, &attr_list))
 159         {
 160                 result = NT_STATUS_NONE_MAPPED;
 161                 goto done;
 162         }
 163
 164         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 165
 166         for (i=0; i<num_rids; i++) {
 167                 if (attrs[i] == SID_NAME_UNKNOWN) {
 168                         names[i] = NULL;
 169                 } else {
 170                         names[i] = talloc_strdup(names, account_names[i]);
 171                         if (names[i] == NULL) {
 172                                 result = NT_STATUS_NO_MEMORY;
 173                                 goto done;
 174                         }
 175
 176                 }
 177         }
 178
 179 done:
 180         TALLOC_FREE(account_names);
 181         TALLOC_FREE(domain);
 182         TALLOC_FREE(attr_list);
 183         return result;
 184 }
 185
 186 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, int policy_index, uint32 *value)
 187 {
 188         return NT_STATUS_UNSUCCESSFUL;
 189 }
 190
 191 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, int policy_index, uint32 value)
 192 {
 193         return NT_STATUS_UNSUCCESSFUL;
 194 }
 195
 196 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 197                                       struct pdb_search *search)
 198 {
 199         return false;
 200 }
 201
 202 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 203                                        struct pdb_search *search,
 204                                        const DOM_SID *sid)
 205 {
 206
 207         return false;
 208 }
 209
 210 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 211                                           const char *domain,
 212                                           char **pwd,
 213                                           DOM_SID *sid,
 214                                           time_t *pass_last_set_time)
 215 {
 216         return false;
 217
 218 }
 219
 220 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 221                                           const char *domain,
 222                                           const char *pwd,
 223                                           const DOM_SID *sid)
 224 {
 225         return false;
 226 }
 227
 228 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 229                                           const char *domain)
 230 {
 231         return false;
 232 }
 233
 234 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 235                                              TALLOC_CTX *mem_ctx,
 236                                              uint32 *num_domains,
 237                                              struct trustdom_info ***domains)
 238 {
 239         return NT_STATUS_NOT_IMPLEMENTED;
 240 }
 241
 242 static bool _make_group_map(struct pdb_methods *methods, const char *domain, const char *name, enum lsa_SidType name_type, gid_t gid, DOM_SID *sid, GROUP_MAP *map)
 243 {
 244         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 245                 domain, *lp_winbind_separator(), name);
 246         map->sid_name_use = name_type;
 247         map->sid = *sid;
 248         map->gid = gid;
 249         return true;
 250 }
 251
 252 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 253                                  DOM_SID sid)
 254 {
 255         NTSTATUS result = NT_STATUS_OK;
 256         char *name = NULL;
 257         char *domain = NULL;
 258         enum lsa_SidType name_type;
 259         gid_t gid;
 260
 261         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 262                                 (const char **) &name, &name_type)) {
 263                 result = NT_STATUS_NO_SUCH_GROUP;
 264                 goto done;
 265         }
 266
 267         if ((name_type != SID_NAME_DOM_GRP) &&
 268             (name_type != SID_NAME_DOMAIN) &&
 269             (name_type != SID_NAME_ALIAS) &&
 270             (name_type != SID_NAME_WKN_GRP)) {
 271                 result = NT_STATUS_NO_SUCH_GROUP;
 272                 goto done;
 273         }
 274
 275         if (!winbind_sid_to_gid(&gid, &sid)) {
 276                 result = NT_STATUS_NO_SUCH_GROUP;
 277                 goto done;
 278         }
 279
 280         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 281                 result = NT_STATUS_NO_SUCH_GROUP;
 282                 goto done;
 283         }
 284
 285 done:
 286         TALLOC_FREE(name);
 287         TALLOC_FREE(domain);
 288         return result;
 289 }
 290
 291 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 292                                  gid_t gid)
 293 {
 294         NTSTATUS result = NT_STATUS_OK;
 295         char *name = NULL;
 296         char *domain = NULL;
 297         DOM_SID sid;
 298         enum lsa_SidType name_type;
 299
 300         if (!winbind_gid_to_sid(&sid, gid)) {
 301                 result = NT_STATUS_NO_SUCH_GROUP;
 302                 goto done;
 303         }
 304
 305         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 306                                 (const char **)&name, &name_type)) {
 307                 result = NT_STATUS_NO_SUCH_GROUP;
 308                 goto done;
 309         }
 310
 311         if ((name_type != SID_NAME_DOM_GRP) &&
 312             (name_type != SID_NAME_DOMAIN) &&
 313             (name_type != SID_NAME_ALIAS) &&
 314             (name_type != SID_NAME_WKN_GRP)) {
 315                 result = NT_STATUS_NO_SUCH_GROUP;
 316                 goto done;
 317         }
 318
 319         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 320                 result = NT_STATUS_NO_SUCH_GROUP;
 321                 goto done;
 322         }
 323
 324 done:
 325         TALLOC_FREE(name);
 326         TALLOC_FREE(domain);
 327
 328         return result;
 329 }
 330
 331 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 332                                  const char *name)
 333 {
 334         NTSTATUS result = NT_STATUS_OK;
 335         char *user_name = NULL;
 336         char *domain = NULL;
 337         DOM_SID sid;
 338         gid_t gid;
 339         enum lsa_SidType name_type;
 340
 341         if (!winbind_lookup_name(domain, user_name, &sid, &name_type)) {
 342                 result = NT_STATUS_NO_SUCH_GROUP;
 343                 goto done;
 344         }
 345
 346         if ((name_type != SID_NAME_DOM_GRP) &&
 347             (name_type != SID_NAME_DOMAIN) &&
 348             (name_type != SID_NAME_ALIAS) &&
 349             (name_type != SID_NAME_WKN_GRP)) {
 350                 result = NT_STATUS_NO_SUCH_GROUP;
 351                 goto done;
 352         }
 353
 354         if (!winbind_sid_to_gid(&gid, &sid)) {
 355                 result = NT_STATUS_NO_SUCH_GROUP;
 356                 goto done;
 357         }
 358
 359         if (!_make_group_map(methods, domain, user_name, name_type, gid, &sid, map)) {
 360                 result = NT_STATUS_NO_SUCH_GROUP;
 361                 goto done;
 362         }
 363
 364 done:
 365
 366         return result;
 367 }
 368
 369 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 370                                            const DOM_SID *sid, enum lsa_SidType sid_name_use,
 371                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 372                                            bool unix_only)
 373 {
 374         return NT_STATUS_NOT_IMPLEMENTED;
 375 }
 376
 377 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 378                                    const DOM_SID *sid,
 379                                    struct acct_info *info)
 380 {
 381         return NT_STATUS_NOT_IMPLEMENTED;
 382 }
 383
 384 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 385                                    const DOM_SID *alias, DOM_SID **pp_members,
 386                                    size_t *p_num_members)
 387 {
 388         return NT_STATUS_NOT_IMPLEMENTED;
 389 }
 390
 391 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 392                                        TALLOC_CTX *mem_ctx,
 393                                        const DOM_SID *domain_sid,
 394                                        const DOM_SID *members,
 395                                        size_t num_members,
 396                                        uint32 **pp_alias_rids,
 397                                        size_t *p_num_alias_rids)
 398 {
 399         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 400                     members, num_members, pp_alias_rids, p_num_alias_rids))
 401                 return NT_STATUS_UNSUCCESSFUL;
 402
 403         return NT_STATUS_OK;
 404 }
 405
 406 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 407 {
 408         NTSTATUS result;
 409
 410         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 411                 return result;
 412         }
 413
 414         (*pdb_method)->name = "wbc_sam";
 415
 416         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 417         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 418
 419         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 420         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 421         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 422         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 423         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 424         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 425         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 426         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 427         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 428         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 429         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 430         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 431         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 432         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 433         (*pdb_method)->sid_to_id = pdb_wbc_sam_sid_to_id;
 434
 435         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 436         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 437
 438         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 439         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 440         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 441         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 442
 443         (*pdb_method)->private_data = NULL;
 444         (*pdb_method)->free_private_data = NULL;
 445
 446         return NT_STATUS_OK;
 447 }
 448
 449 NTSTATUS pdb_wbc_sam_init(void)
 450 {
 451         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 452 }