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
 119         if (!winbind_get_groups(mem_ctx, username, p_num_groups, pp_gids)) {
 120                 return NT_STATUS_NO_SUCH_USER;
 121         }
 122
 123         if (*p_num_groups == 0) {
 124                 smb_panic("primary group missing");
 125         }
 126
 127         *pp_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *p_num_groups);
 128
 129         if (*pp_sids == NULL) {
 130                 TALLOC_FREE(*pp_gids);
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133
 134         for (i=0; i < *p_num_groups; i++) {
 135                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 136         }
 137
 138         return NT_STATUS_OK;
 139 }
 140
 141 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 142                                         const DOM_SID *domain_sid,
 143                                         int num_rids,
 144                                         uint32 *rids,
 145                                         const char **names,
 146                                         enum lsa_SidType *attrs)
 147 {
 148         NTSTATUS result = NT_STATUS_OK;
 149         char *domain = NULL;
 150         char **account_names = NULL;
 151         char name[256];
 152         enum lsa_SidType *attr_list = NULL;
 153         int i;
 154
 155         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 156                                  (const char **)&domain,
 157                                  (const char ***)&account_names, &attr_list))
 158         {
 159                 result = NT_STATUS_NONE_MAPPED;
 160                 goto done;
 161         }
 162
 163         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 164
 165         for (i=0; i<num_rids; i++) {
 166                 if (attrs[i] == SID_NAME_UNKNOWN) {
 167                         names[i] = NULL;
 168                 } else {
 169                         snprintf(name, sizeof(name), "%s%c%s", domain,
 170                                  *lp_winbind_separator(), account_names[i]);
 171                         names[i] = talloc_strdup(names, name);
 172                 }
 173         }
 174
 175 done:
 176         TALLOC_FREE(account_names);
 177         TALLOC_FREE(domain);
 178         TALLOC_FREE(attrs);
 179         return result;
 180 }
 181
 182 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, int policy_index, uint32 *value)
 183 {
 184         return NT_STATUS_UNSUCCESSFUL;
 185 }
 186
 187 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, int policy_index, uint32 value)
 188 {
 189         return NT_STATUS_UNSUCCESSFUL;
 190 }
 191
 192 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 193                                       struct pdb_search *search)
 194 {
 195         return false;
 196 }
 197
 198 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 199                                        struct pdb_search *search,
 200                                        const DOM_SID *sid)
 201 {
 202
 203         return false;
 204 }
 205
 206 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 207                                           const char *domain,
 208                                           char **pwd,
 209                                           DOM_SID *sid,
 210                                           time_t *pass_last_set_time)
 211 {
 212         return false;
 213
 214 }
 215
 216 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 217                                           const char *domain,
 218                                           const char *pwd,
 219                                           const DOM_SID *sid)
 220 {
 221         return false;
 222 }
 223
 224 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 225                                           const char *domain)
 226 {
 227         return false;
 228 }
 229
 230 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 231                                              TALLOC_CTX *mem_ctx,
 232                                              uint32 *num_domains,
 233                                              struct trustdom_info ***domains)
 234 {
 235         return NT_STATUS_NOT_IMPLEMENTED;
 236 }
 237
 238 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)
 239 {
 240         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 241                 domain, *lp_winbind_separator(), name);
 242         map->sid_name_use = name_type;
 243         map->sid = *sid;
 244         map->gid = gid;
 245         return true;
 246 }
 247
 248 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 249                                  DOM_SID sid)
 250 {
 251         NTSTATUS result = NT_STATUS_OK;
 252         char *name = NULL;
 253         char *domain = NULL;
 254         enum lsa_SidType name_type;
 255         gid_t gid;
 256
 257         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 258                                 (const char **) &name, &name_type)) {
 259                 result = NT_STATUS_NO_SUCH_GROUP;
 260                 goto done;
 261         }
 262
 263         if ((name_type != SID_NAME_DOM_GRP) &&
 264             (name_type != SID_NAME_DOMAIN) &&
 265             (name_type != SID_NAME_ALIAS) &&
 266             (name_type != SID_NAME_WKN_GRP)) {
 267                 result = NT_STATUS_NO_SUCH_GROUP;
 268                 goto done;
 269         }
 270
 271         if (!winbind_sid_to_gid(&gid, &sid)) {
 272                 result = NT_STATUS_NO_SUCH_GROUP;
 273                 goto done;
 274         }
 275
 276         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 277                 result = NT_STATUS_NO_SUCH_GROUP;
 278                 goto done;
 279         }
 280
 281 done:
 282         TALLOC_FREE(name);
 283         TALLOC_FREE(domain);
 284         return result;
 285 }
 286
 287 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 288                                  gid_t gid)
 289 {
 290         NTSTATUS result = NT_STATUS_OK;
 291         char *name = NULL;
 292         char *domain = NULL;
 293         DOM_SID sid;
 294         enum lsa_SidType name_type;
 295
 296         if (!winbind_gid_to_sid(&sid, gid)) {
 297                 result = NT_STATUS_NO_SUCH_GROUP;
 298                 goto done;
 299         }
 300
 301         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 302                                 (const char **)&name, &name_type)) {
 303                 result = NT_STATUS_NO_SUCH_GROUP;
 304                 goto done;
 305         }
 306
 307         if ((name_type != SID_NAME_DOM_GRP) &&
 308             (name_type != SID_NAME_DOMAIN) &&
 309             (name_type != SID_NAME_ALIAS) &&
 310             (name_type != SID_NAME_WKN_GRP)) {
 311                 result = NT_STATUS_NO_SUCH_GROUP;
 312                 goto done;
 313         }
 314
 315         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 316                 result = NT_STATUS_NO_SUCH_GROUP;
 317                 goto done;
 318         }
 319
 320 done:
 321         TALLOC_FREE(name);
 322         TALLOC_FREE(domain);
 323
 324         return result;
 325 }
 326
 327 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 328                                  const char *name)
 329 {
 330         NTSTATUS result = NT_STATUS_OK;
 331         char *user_name = NULL;
 332         char *domain = NULL;
 333         DOM_SID sid;
 334         gid_t gid;
 335         enum lsa_SidType name_type;
 336
 337         if (!winbind_lookup_name(domain, user_name, &sid, &name_type)) {
 338                 result = NT_STATUS_NO_SUCH_GROUP;
 339                 goto done;
 340         }
 341
 342         if ((name_type != SID_NAME_DOM_GRP) &&
 343             (name_type != SID_NAME_DOMAIN) &&
 344             (name_type != SID_NAME_ALIAS) &&
 345             (name_type != SID_NAME_WKN_GRP)) {
 346                 result = NT_STATUS_NO_SUCH_GROUP;
 347                 goto done;
 348         }
 349
 350         if (!winbind_sid_to_gid(&gid, &sid)) {
 351                 result = NT_STATUS_NO_SUCH_GROUP;
 352                 goto done;
 353         }
 354
 355         if (!_make_group_map(methods, domain, user_name, name_type, gid, &sid, map)) {
 356                 result = NT_STATUS_NO_SUCH_GROUP;
 357                 goto done;
 358         }
 359
 360 done:
 361
 362         return result;
 363 }
 364
 365 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 366                                            const DOM_SID *sid, enum lsa_SidType sid_name_use,
 367                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 368                                            bool unix_only)
 369 {
 370         return NT_STATUS_NOT_IMPLEMENTED;
 371 }
 372
 373 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 374                                    const DOM_SID *sid,
 375                                    struct acct_info *info)
 376 {
 377         return NT_STATUS_NOT_IMPLEMENTED;
 378 }
 379
 380 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 381                                    const DOM_SID *alias, DOM_SID **pp_members,
 382                                    size_t *p_num_members)
 383 {
 384         return NT_STATUS_NOT_IMPLEMENTED;
 385 }
 386
 387 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 388                                        TALLOC_CTX *mem_ctx,
 389                                        const DOM_SID *domain_sid,
 390                                        const DOM_SID *members,
 391                                        size_t num_members,
 392                                        uint32 **pp_alias_rids,
 393                                        size_t *p_num_alias_rids)
 394 {
 395         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 396                     members, num_members, pp_alias_rids, p_num_alias_rids))
 397                 return NT_STATUS_UNSUCCESSFUL;
 398
 399         return NT_STATUS_OK;
 400 }
 401
 402 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 403 {
 404         NTSTATUS result;
 405
 406         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 407                 return result;
 408         }
 409
 410         (*pdb_method)->name = "wbc_sam";
 411
 412         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 413         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 414
 415         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 416         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 417         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 418         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 419         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 420         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 421         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 422         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 423         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 424         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 425         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 426         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 427         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 428         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 429         (*pdb_method)->sid_to_id = pdb_wbc_sam_sid_to_id;
 430
 431         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 432         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 433
 434         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 435         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 436         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 437         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 438
 439         (*pdb_method)->private_data = NULL;
 440         (*pdb_method)->free_private_data = NULL;
 441
 442         return NT_STATUS_OK;
 443 }
 444
 445 NTSTATUS pdb_wbc_sam_init(void)
 446 {
 447         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 448 }