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 NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
  85                                                TALLOC_CTX *mem_ctx,
  86                                                const DOM_SID *group,
  87                                                uint32 **pp_member_rids,
  88                                                size_t *p_num_members)
  89 {
  90         return NT_STATUS_NOT_IMPLEMENTED;
  91 }
  92
  93 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
  94                                                    TALLOC_CTX *mem_ctx,
  95                                                    struct samu *user,
  96                                                    DOM_SID **pp_sids,
  97                                                    gid_t **pp_gids,
  98                                                    size_t *p_num_groups)
  99 {
 100         size_t i;
 101         const char *username = pdb_get_username(user);
 102         uint32_t num_groups;
 103
 104         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 105                 return NT_STATUS_NO_SUCH_USER;
 106         }
 107         *p_num_groups = num_groups;
 108
 109         if (*p_num_groups == 0) {
 110                 smb_panic("primary group missing");
 111         }
 112
 113         *pp_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, *p_num_groups);
 114
 115         if (*pp_sids == NULL) {
 116                 TALLOC_FREE(*pp_gids);
 117                 return NT_STATUS_NO_MEMORY;
 118         }
 119
 120         for (i=0; i < *p_num_groups; i++) {
 121                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 122         }
 123
 124         return NT_STATUS_OK;
 125 }
 126
 127 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 128                                         const DOM_SID *domain_sid,
 129                                         int num_rids,
 130                                         uint32 *rids,
 131                                         const char **names,
 132                                         enum lsa_SidType *attrs)
 133 {
 134         NTSTATUS result = NT_STATUS_OK;
 135         char *domain = NULL;
 136         char **account_names = NULL;
 137         enum lsa_SidType *attr_list = NULL;
 138         int i;
 139
 140         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 141                                  (const char **)&domain,
 142                                  (const char ***)&account_names, &attr_list))
 143         {
 144                 result = NT_STATUS_NONE_MAPPED;
 145                 goto done;
 146         }
 147
 148         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 149
 150         for (i=0; i<num_rids; i++) {
 151                 if (attrs[i] == SID_NAME_UNKNOWN) {
 152                         names[i] = NULL;
 153                 } else {
 154                         names[i] = talloc_strdup(names, account_names[i]);
 155                         if (names[i] == NULL) {
 156                                 result = NT_STATUS_NO_MEMORY;
 157                                 goto done;
 158                         }
 159
 160                 }
 161         }
 162
 163 done:
 164         TALLOC_FREE(account_names);
 165         TALLOC_FREE(domain);
 166         TALLOC_FREE(attr_list);
 167         return result;
 168 }
 169
 170 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t *value)
 171 {
 172         return NT_STATUS_UNSUCCESSFUL;
 173 }
 174
 175 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t value)
 176 {
 177         return NT_STATUS_UNSUCCESSFUL;
 178 }
 179
 180 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 181                                       struct pdb_search *search)
 182 {
 183         return false;
 184 }
 185
 186 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 187                                        struct pdb_search *search,
 188                                        const DOM_SID *sid)
 189 {
 190
 191         return false;
 192 }
 193
 194 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 195                                           const char *domain,
 196                                           char **pwd,
 197                                           DOM_SID *sid,
 198                                           time_t *pass_last_set_time)
 199 {
 200         return false;
 201
 202 }
 203
 204 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 205                                           const char *domain,
 206                                           const char *pwd,
 207                                           const DOM_SID *sid)
 208 {
 209         return false;
 210 }
 211
 212 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 213                                           const char *domain)
 214 {
 215         return false;
 216 }
 217
 218 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 219                                              TALLOC_CTX *mem_ctx,
 220                                              uint32 *num_domains,
 221                                              struct trustdom_info ***domains)
 222 {
 223         return NT_STATUS_NOT_IMPLEMENTED;
 224 }
 225
 226 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)
 227 {
 228         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 229                 domain, *lp_winbind_separator(), name);
 230         map->sid_name_use = name_type;
 231         map->sid = *sid;
 232         map->gid = gid;
 233         return true;
 234 }
 235
 236 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 237                                  DOM_SID sid)
 238 {
 239         NTSTATUS result = NT_STATUS_OK;
 240         char *name = NULL;
 241         char *domain = NULL;
 242         enum lsa_SidType name_type;
 243         gid_t gid;
 244
 245         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 246                                 (const char **) &name, &name_type)) {
 247                 result = NT_STATUS_NO_SUCH_GROUP;
 248                 goto done;
 249         }
 250
 251         if ((name_type != SID_NAME_DOM_GRP) &&
 252             (name_type != SID_NAME_DOMAIN) &&
 253             (name_type != SID_NAME_ALIAS) &&
 254             (name_type != SID_NAME_WKN_GRP)) {
 255                 result = NT_STATUS_NO_SUCH_GROUP;
 256                 goto done;
 257         }
 258
 259         if (!winbind_sid_to_gid(&gid, &sid)) {
 260                 result = NT_STATUS_NO_SUCH_GROUP;
 261                 goto done;
 262         }
 263
 264         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 265                 result = NT_STATUS_NO_SUCH_GROUP;
 266                 goto done;
 267         }
 268
 269 done:
 270         TALLOC_FREE(name);
 271         TALLOC_FREE(domain);
 272         return result;
 273 }
 274
 275 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 276                                  gid_t gid)
 277 {
 278         NTSTATUS result = NT_STATUS_OK;
 279         char *name = NULL;
 280         char *domain = NULL;
 281         DOM_SID sid;
 282         enum lsa_SidType name_type;
 283
 284         if (!winbind_gid_to_sid(&sid, gid)) {
 285                 result = NT_STATUS_NO_SUCH_GROUP;
 286                 goto done;
 287         }
 288
 289         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 290                                 (const char **)&name, &name_type)) {
 291                 result = NT_STATUS_NO_SUCH_GROUP;
 292                 goto done;
 293         }
 294
 295         if ((name_type != SID_NAME_DOM_GRP) &&
 296             (name_type != SID_NAME_DOMAIN) &&
 297             (name_type != SID_NAME_ALIAS) &&
 298             (name_type != SID_NAME_WKN_GRP)) {
 299                 result = NT_STATUS_NO_SUCH_GROUP;
 300                 goto done;
 301         }
 302
 303         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 304                 result = NT_STATUS_NO_SUCH_GROUP;
 305                 goto done;
 306         }
 307
 308 done:
 309         TALLOC_FREE(name);
 310         TALLOC_FREE(domain);
 311
 312         return result;
 313 }
 314
 315 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 316                                  const char *name)
 317 {
 318         NTSTATUS result = NT_STATUS_OK;
 319         char *user_name = NULL;
 320         char *domain = NULL;
 321         DOM_SID sid;
 322         gid_t gid;
 323         enum lsa_SidType name_type;
 324
 325         if (!winbind_lookup_name(domain, user_name, &sid, &name_type)) {
 326                 result = NT_STATUS_NO_SUCH_GROUP;
 327                 goto done;
 328         }
 329
 330         if ((name_type != SID_NAME_DOM_GRP) &&
 331             (name_type != SID_NAME_DOMAIN) &&
 332             (name_type != SID_NAME_ALIAS) &&
 333             (name_type != SID_NAME_WKN_GRP)) {
 334                 result = NT_STATUS_NO_SUCH_GROUP;
 335                 goto done;
 336         }
 337
 338         if (!winbind_sid_to_gid(&gid, &sid)) {
 339                 result = NT_STATUS_NO_SUCH_GROUP;
 340                 goto done;
 341         }
 342
 343         if (!_make_group_map(methods, domain, user_name, name_type, gid, &sid, map)) {
 344                 result = NT_STATUS_NO_SUCH_GROUP;
 345                 goto done;
 346         }
 347
 348 done:
 349
 350         return result;
 351 }
 352
 353 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 354                                            const DOM_SID *sid, enum lsa_SidType sid_name_use,
 355                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 356                                            bool unix_only)
 357 {
 358         return NT_STATUS_NOT_IMPLEMENTED;
 359 }
 360
 361 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 362                                    const DOM_SID *sid,
 363                                    struct acct_info *info)
 364 {
 365         return NT_STATUS_NOT_IMPLEMENTED;
 366 }
 367
 368 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 369                                           const DOM_SID *alias,
 370                                           TALLOC_CTX *mem_ctx,
 371                                           DOM_SID **pp_members,
 372                                           size_t *p_num_members)
 373 {
 374         return NT_STATUS_NOT_IMPLEMENTED;
 375 }
 376
 377 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 378                                        TALLOC_CTX *mem_ctx,
 379                                        const DOM_SID *domain_sid,
 380                                        const DOM_SID *members,
 381                                        size_t num_members,
 382                                        uint32 **pp_alias_rids,
 383                                        size_t *p_num_alias_rids)
 384 {
 385         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 386                     members, num_members, pp_alias_rids, p_num_alias_rids))
 387                 return NT_STATUS_UNSUCCESSFUL;
 388
 389         return NT_STATUS_OK;
 390 }
 391
 392 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 393 {
 394         NTSTATUS result;
 395
 396         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 397                 return result;
 398         }
 399
 400         (*pdb_method)->name = "wbc_sam";
 401
 402         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 403         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 404
 405         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 406         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 407         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 408         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 409         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 410         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 411         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 412         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 413         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 414         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 415         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 416         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 417         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 418         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 419
 420         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 421         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 422
 423         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 424         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 425         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 426         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 427
 428         (*pdb_method)->private_data = NULL;
 429         (*pdb_method)->free_private_data = NULL;
 430
 431         return NT_STATUS_OK;
 432 }
 433
 434 NTSTATUS pdb_wbc_sam_init(void)
 435 {
 436         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 437 }