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 #include "lib/winbind_util.h"
  41
  42 /***************************************************************************
  43   Default implementations of some functions.
  44  ****************************************************************************/
  45 static NTSTATUS _pdb_wbc_sam_getsampw(struct pdb_methods *methods,
  46                                        struct samu *user,
  47                                        const struct passwd *pwd)
  48 {
  49         NTSTATUS result = NT_STATUS_OK;
  50
  51         if (pwd == NULL)
  52                 return NT_STATUS_NO_SUCH_USER;
  53
  54         ZERO_STRUCTP(user);
  55
  56         /* Can we really get away with this little of information */
  57         user->methods = methods;
  58         result = samu_set_unix(user, pwd);
  59
  60         return result;
  61 }
  62
  63 static NTSTATUS pdb_wbc_sam_getsampwnam(struct pdb_methods *methods, struct samu *user, const char *sname)
  64 {
  65         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwnam(sname));
  66 }
  67
  68 static NTSTATUS pdb_wbc_sam_getsampwsid(struct pdb_methods *methods, struct samu *user, const struct dom_sid *sid)
  69 {
  70         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwsid(sid));
  71 }
  72
  73 static bool pdb_wbc_sam_uid_to_sid(struct pdb_methods *methods, uid_t uid,
  74                                    struct dom_sid *sid)
  75 {
  76         return winbind_uid_to_sid(sid, uid);
  77 }
  78
  79 static bool pdb_wbc_sam_gid_to_sid(struct pdb_methods *methods, gid_t gid,
  80                                    struct dom_sid *sid)
  81 {
  82         return winbind_gid_to_sid(sid, gid);
  83 }
  84
  85 static NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
  86                                                TALLOC_CTX *mem_ctx,
  87                                                const struct dom_sid *group,
  88                                                uint32 **pp_member_rids,
  89                                                size_t *p_num_members)
  90 {
  91         return NT_STATUS_NOT_IMPLEMENTED;
  92 }
  93
  94 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
  95                                                    TALLOC_CTX *mem_ctx,
  96                                                    struct samu *user,
  97                                                    struct dom_sid **pp_sids,
  98                                                    gid_t **pp_gids,
  99                                                    uint32_t *p_num_groups)
 100 {
 101         size_t i;
 102         const char *username = pdb_get_username(user);
 103         uint32_t num_groups;
 104
 105         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 106                 return NT_STATUS_NO_SUCH_USER;
 107         }
 108         *p_num_groups = num_groups;
 109
 110         if (*p_num_groups == 0) {
 111                 smb_panic("primary group missing");
 112         }
 113
 114         *pp_sids = TALLOC_ARRAY(mem_ctx, struct dom_sid, *p_num_groups);
 115
 116         if (*pp_sids == NULL) {
 117                 TALLOC_FREE(*pp_gids);
 118                 return NT_STATUS_NO_MEMORY;
 119         }
 120
 121         for (i=0; i < *p_num_groups; i++) {
 122                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 123         }
 124
 125         return NT_STATUS_OK;
 126 }
 127
 128 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 129                                         const struct dom_sid *domain_sid,
 130                                         int num_rids,
 131                                         uint32 *rids,
 132                                         const char **names,
 133                                         enum lsa_SidType *attrs)
 134 {
 135         NTSTATUS result = NT_STATUS_OK;
 136         char *domain = NULL;
 137         char **account_names = NULL;
 138         enum lsa_SidType *attr_list = NULL;
 139         int i;
 140
 141         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 142                                  (const char **)&domain,
 143                                  (const char ***)&account_names, &attr_list))
 144         {
 145                 result = NT_STATUS_NONE_MAPPED;
 146                 goto done;
 147         }
 148
 149         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 150
 151         for (i=0; i<num_rids; i++) {
 152                 if (attrs[i] == SID_NAME_UNKNOWN) {
 153                         names[i] = NULL;
 154                 } else {
 155                         names[i] = talloc_strdup(names, account_names[i]);
 156                         if (names[i] == NULL) {
 157                                 result = NT_STATUS_NO_MEMORY;
 158                                 goto done;
 159                         }
 160
 161                 }
 162         }
 163
 164 done:
 165         TALLOC_FREE(account_names);
 166         TALLOC_FREE(domain);
 167         TALLOC_FREE(attr_list);
 168         return result;
 169 }
 170
 171 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t *value)
 172 {
 173         return NT_STATUS_UNSUCCESSFUL;
 174 }
 175
 176 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t value)
 177 {
 178         return NT_STATUS_UNSUCCESSFUL;
 179 }
 180
 181 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 182                                       struct pdb_search *search)
 183 {
 184         return false;
 185 }
 186
 187 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 188                                        struct pdb_search *search,
 189                                        const struct dom_sid *sid)
 190 {
 191
 192         return false;
 193 }
 194
 195 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 196                                           const char *domain,
 197                                           char **pwd,
 198                                           struct dom_sid *sid,
 199                                           time_t *pass_last_set_time)
 200 {
 201         return false;
 202
 203 }
 204
 205 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 206                                           const char *domain,
 207                                           const char *pwd,
 208                                           const struct dom_sid *sid)
 209 {
 210         return false;
 211 }
 212
 213 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 214                                           const char *domain)
 215 {
 216         return false;
 217 }
 218
 219 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 220                                              TALLOC_CTX *mem_ctx,
 221                                              uint32 *num_domains,
 222                                              struct trustdom_info ***domains)
 223 {
 224         return NT_STATUS_NOT_IMPLEMENTED;
 225 }
 226
 227 static bool _make_group_map(struct pdb_methods *methods, const char *domain, const char *name, enum lsa_SidType name_type, gid_t gid, struct dom_sid *sid, GROUP_MAP *map)
 228 {
 229         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 230                 domain, *lp_winbind_separator(), name);
 231         map->sid_name_use = name_type;
 232         map->sid = *sid;
 233         map->gid = gid;
 234         return true;
 235 }
 236
 237 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 238                                  struct dom_sid sid)
 239 {
 240         NTSTATUS result = NT_STATUS_OK;
 241         char *name = NULL;
 242         char *domain = NULL;
 243         enum lsa_SidType name_type;
 244         gid_t gid;
 245
 246         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 247                                 (const char **) &name, &name_type)) {
 248                 result = NT_STATUS_NO_SUCH_GROUP;
 249                 goto done;
 250         }
 251
 252         if ((name_type != SID_NAME_DOM_GRP) &&
 253             (name_type != SID_NAME_DOMAIN) &&
 254             (name_type != SID_NAME_ALIAS) &&
 255             (name_type != SID_NAME_WKN_GRP)) {
 256                 result = NT_STATUS_NO_SUCH_GROUP;
 257                 goto done;
 258         }
 259
 260         if (!winbind_sid_to_gid(&gid, &sid)) {
 261                 result = NT_STATUS_NO_SUCH_GROUP;
 262                 goto done;
 263         }
 264
 265         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 266                 result = NT_STATUS_NO_SUCH_GROUP;
 267                 goto done;
 268         }
 269
 270 done:
 271         TALLOC_FREE(name);
 272         TALLOC_FREE(domain);
 273         return result;
 274 }
 275
 276 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 277                                  gid_t gid)
 278 {
 279         NTSTATUS result = NT_STATUS_OK;
 280         char *name = NULL;
 281         char *domain = NULL;
 282         struct dom_sid sid;
 283         enum lsa_SidType name_type;
 284
 285         if (!winbind_gid_to_sid(&sid, gid)) {
 286                 result = NT_STATUS_NO_SUCH_GROUP;
 287                 goto done;
 288         }
 289
 290         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 291                                 (const char **)&name, &name_type)) {
 292                 result = NT_STATUS_NO_SUCH_GROUP;
 293                 goto done;
 294         }
 295
 296         if ((name_type != SID_NAME_DOM_GRP) &&
 297             (name_type != SID_NAME_DOMAIN) &&
 298             (name_type != SID_NAME_ALIAS) &&
 299             (name_type != SID_NAME_WKN_GRP)) {
 300                 result = NT_STATUS_NO_SUCH_GROUP;
 301                 goto done;
 302         }
 303
 304         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 305                 result = NT_STATUS_NO_SUCH_GROUP;
 306                 goto done;
 307         }
 308
 309 done:
 310         TALLOC_FREE(name);
 311         TALLOC_FREE(domain);
 312
 313         return result;
 314 }
 315
 316 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 317                                  const char *name)
 318 {
 319         NTSTATUS result = NT_STATUS_OK;
 320         const char *domain = "";
 321         struct dom_sid sid;
 322         gid_t gid;
 323         enum lsa_SidType name_type;
 324
 325         if (!winbind_lookup_name(domain, 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, 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 struct 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 struct 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 struct dom_sid *alias,
 370                                           TALLOC_CTX *mem_ctx,
 371                                           struct 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 struct dom_sid *domain_sid,
 380                                        const struct 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 }