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         char name[256];
 154         enum lsa_SidType *attr_list = NULL;
 155         int i;
 156
 157         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 158                                  (const char **)&domain,
 159                                  (const char ***)&account_names, &attr_list))
 160         {
 161                 result = NT_STATUS_NONE_MAPPED;
 162                 goto done;
 163         }
 164
 165         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 166
 167         for (i=0; i<num_rids; i++) {
 168                 if (attrs[i] == SID_NAME_UNKNOWN) {
 169                         names[i] = NULL;
 170                 } else {
 171                         snprintf(name, sizeof(name), "%s%c%s", domain,
 172                                  *lp_winbind_separator(), account_names[i]);
 173                         names[i] = talloc_strdup(names, name);
 174                 }
 175         }
 176
 177 done:
 178         TALLOC_FREE(account_names);
 179         TALLOC_FREE(domain);
 180         TALLOC_FREE(attrs);
 181         return result;
 182 }
 183
 184 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, int policy_index, uint32 *value)
 185 {
 186         return NT_STATUS_UNSUCCESSFUL;
 187 }
 188
 189 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, int policy_index, uint32 value)
 190 {
 191         return NT_STATUS_UNSUCCESSFUL;
 192 }
 193
 194 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 195                                       struct pdb_search *search)
 196 {
 197         return false;
 198 }
 199
 200 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 201                                        struct pdb_search *search,
 202                                        const DOM_SID *sid)
 203 {
 204
 205         return false;
 206 }
 207
 208 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 209                                           const char *domain,
 210                                           char **pwd,
 211                                           DOM_SID *sid,
 212                                           time_t *pass_last_set_time)
 213 {
 214         return false;
 215
 216 }
 217
 218 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 219                                           const char *domain,
 220                                           const char *pwd,
 221                                           const DOM_SID *sid)
 222 {
 223         return false;
 224 }
 225
 226 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 227                                           const char *domain)
 228 {
 229         return false;
 230 }
 231
 232 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 233                                              TALLOC_CTX *mem_ctx,
 234                                              uint32 *num_domains,
 235                                              struct trustdom_info ***domains)
 236 {
 237         return NT_STATUS_NOT_IMPLEMENTED;
 238 }
 239
 240 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)
 241 {
 242         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 243                 domain, *lp_winbind_separator(), name);
 244         map->sid_name_use = name_type;
 245         map->sid = *sid;
 246         map->gid = gid;
 247         return true;
 248 }
 249
 250 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 251                                  DOM_SID sid)
 252 {
 253         NTSTATUS result = NT_STATUS_OK;
 254         char *name = NULL;
 255         char *domain = NULL;
 256         enum lsa_SidType name_type;
 257         gid_t gid;
 258
 259         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 260                                 (const char **) &name, &name_type)) {
 261                 result = NT_STATUS_NO_SUCH_GROUP;
 262                 goto done;
 263         }
 264
 265         if ((name_type != SID_NAME_DOM_GRP) &&
 266             (name_type != SID_NAME_DOMAIN) &&
 267             (name_type != SID_NAME_ALIAS) &&
 268             (name_type != SID_NAME_WKN_GRP)) {
 269                 result = NT_STATUS_NO_SUCH_GROUP;
 270                 goto done;
 271         }
 272
 273         if (!winbind_sid_to_gid(&gid, &sid)) {
 274                 result = NT_STATUS_NO_SUCH_GROUP;
 275                 goto done;
 276         }
 277
 278         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 279                 result = NT_STATUS_NO_SUCH_GROUP;
 280                 goto done;
 281         }
 282
 283 done:
 284         TALLOC_FREE(name);
 285         TALLOC_FREE(domain);
 286         return result;
 287 }
 288
 289 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 290                                  gid_t gid)
 291 {
 292         NTSTATUS result = NT_STATUS_OK;
 293         char *name = NULL;
 294         char *domain = NULL;
 295         DOM_SID sid;
 296         enum lsa_SidType name_type;
 297
 298         if (!winbind_gid_to_sid(&sid, gid)) {
 299                 result = NT_STATUS_NO_SUCH_GROUP;
 300                 goto done;
 301         }
 302
 303         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 304                                 (const char **)&name, &name_type)) {
 305                 result = NT_STATUS_NO_SUCH_GROUP;
 306                 goto done;
 307         }
 308
 309         if ((name_type != SID_NAME_DOM_GRP) &&
 310             (name_type != SID_NAME_DOMAIN) &&
 311             (name_type != SID_NAME_ALIAS) &&
 312             (name_type != SID_NAME_WKN_GRP)) {
 313                 result = NT_STATUS_NO_SUCH_GROUP;
 314                 goto done;
 315         }
 316
 317         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 318                 result = NT_STATUS_NO_SUCH_GROUP;
 319                 goto done;
 320         }
 321
 322 done:
 323         TALLOC_FREE(name);
 324         TALLOC_FREE(domain);
 325
 326         return result;
 327 }
 328
 329 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 330                                  const char *name)
 331 {
 332         NTSTATUS result = NT_STATUS_OK;
 333         char *user_name = NULL;
 334         char *domain = NULL;
 335         DOM_SID sid;
 336         gid_t gid;
 337         enum lsa_SidType name_type;
 338
 339         if (!winbind_lookup_name(domain, user_name, &sid, &name_type)) {
 340                 result = NT_STATUS_NO_SUCH_GROUP;
 341                 goto done;
 342         }
 343
 344         if ((name_type != SID_NAME_DOM_GRP) &&
 345             (name_type != SID_NAME_DOMAIN) &&
 346             (name_type != SID_NAME_ALIAS) &&
 347             (name_type != SID_NAME_WKN_GRP)) {
 348                 result = NT_STATUS_NO_SUCH_GROUP;
 349                 goto done;
 350         }
 351
 352         if (!winbind_sid_to_gid(&gid, &sid)) {
 353                 result = NT_STATUS_NO_SUCH_GROUP;
 354                 goto done;
 355         }
 356
 357         if (!_make_group_map(methods, domain, user_name, name_type, gid, &sid, map)) {
 358                 result = NT_STATUS_NO_SUCH_GROUP;
 359                 goto done;
 360         }
 361
 362 done:
 363
 364         return result;
 365 }
 366
 367 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 368                                            const DOM_SID *sid, enum lsa_SidType sid_name_use,
 369                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 370                                            bool unix_only)
 371 {
 372         return NT_STATUS_NOT_IMPLEMENTED;
 373 }
 374
 375 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 376                                    const DOM_SID *sid,
 377                                    struct acct_info *info)
 378 {
 379         return NT_STATUS_NOT_IMPLEMENTED;
 380 }
 381
 382 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 383                                    const DOM_SID *alias, DOM_SID **pp_members,
 384                                    size_t *p_num_members)
 385 {
 386         return NT_STATUS_NOT_IMPLEMENTED;
 387 }
 388
 389 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 390                                        TALLOC_CTX *mem_ctx,
 391                                        const DOM_SID *domain_sid,
 392                                        const DOM_SID *members,
 393                                        size_t num_members,
 394                                        uint32 **pp_alias_rids,
 395                                        size_t *p_num_alias_rids)
 396 {
 397         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 398                     members, num_members, pp_alias_rids, p_num_alias_rids))
 399                 return NT_STATUS_UNSUCCESSFUL;
 400
 401         return NT_STATUS_OK;
 402 }
 403
 404 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 405 {
 406         NTSTATUS result;
 407
 408         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 409                 return result;
 410         }
 411
 412         (*pdb_method)->name = "wbc_sam";
 413
 414         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 415         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 416
 417         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 418         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 419         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 420         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 421         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 422         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 423         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 424         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 425         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 426         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 427         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 428         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 429         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 430         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 431         (*pdb_method)->sid_to_id = pdb_wbc_sam_sid_to_id;
 432
 433         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 434         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 435
 436         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 437         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 438         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 439         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 440
 441         (*pdb_method)->private_data = NULL;
 442         (*pdb_method)->free_private_data = NULL;
 443
 444         return NT_STATUS_OK;
 445 }
 446
 447 NTSTATUS pdb_wbc_sam_init(void)
 448 {
 449         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 450 }