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 "passdb.h"
  41 #include "lib/winbind_util.h"
  42
  43 /***************************************************************************
  44   Default implementations of some functions.
  45  ****************************************************************************/
  46 static NTSTATUS _pdb_wbc_sam_getsampw(struct pdb_methods *methods,
  47                                        struct samu *user,
  48                                        const struct passwd *pwd)
  49 {
  50         NTSTATUS result = NT_STATUS_OK;
  51
  52         if (pwd == NULL)
  53                 return NT_STATUS_NO_SUCH_USER;
  54
  55         ZERO_STRUCTP(user);
  56
  57         /* Can we really get away with this little of information */
  58         user->methods = methods;
  59         result = samu_set_unix(user, pwd);
  60
  61         return result;
  62 }
  63
  64 static NTSTATUS pdb_wbc_sam_getsampwnam(struct pdb_methods *methods, struct samu *user, const char *sname)
  65 {
  66         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwnam(sname));
  67 }
  68
  69 static NTSTATUS pdb_wbc_sam_getsampwsid(struct pdb_methods *methods, struct samu *user, const struct dom_sid *sid)
  70 {
  71         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwsid(sid));
  72 }
  73
  74 static bool pdb_wbc_sam_uid_to_sid(struct pdb_methods *methods, uid_t uid,
  75                                    struct dom_sid *sid)
  76 {
  77         return winbind_uid_to_sid(sid, uid);
  78 }
  79
  80 static bool pdb_wbc_sam_gid_to_sid(struct pdb_methods *methods, gid_t gid,
  81                                    struct dom_sid *sid)
  82 {
  83         return winbind_gid_to_sid(sid, gid);
  84 }
  85
  86 static NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
  87                                                TALLOC_CTX *mem_ctx,
  88                                                const struct dom_sid *group,
  89                                                uint32 **pp_member_rids,
  90                                                size_t *p_num_members)
  91 {
  92         return NT_STATUS_NOT_IMPLEMENTED;
  93 }
  94
  95 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
  96                                                    TALLOC_CTX *mem_ctx,
  97                                                    struct samu *user,
  98                                                    struct dom_sid **pp_sids,
  99                                                    gid_t **pp_gids,
 100                                                    uint32_t *p_num_groups)
 101 {
 102         size_t i;
 103         const char *username = pdb_get_username(user);
 104         uint32_t num_groups;
 105
 106         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 107                 return NT_STATUS_NO_SUCH_USER;
 108         }
 109         *p_num_groups = num_groups;
 110
 111         if (*p_num_groups == 0) {
 112                 smb_panic("primary group missing");
 113         }
 114
 115         *pp_sids = talloc_array(mem_ctx, struct dom_sid, *p_num_groups);
 116
 117         if (*pp_sids == NULL) {
 118                 TALLOC_FREE(*pp_gids);
 119                 return NT_STATUS_NO_MEMORY;
 120         }
 121
 122         for (i=0; i < *p_num_groups; i++) {
 123                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 124         }
 125
 126         return NT_STATUS_OK;
 127 }
 128
 129 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 130                                         const struct dom_sid *domain_sid,
 131                                         int num_rids,
 132                                         uint32 *rids,
 133                                         const char **names,
 134                                         enum lsa_SidType *attrs)
 135 {
 136         NTSTATUS result = NT_STATUS_OK;
 137         char *domain = NULL;
 138         char **account_names = NULL;
 139         enum lsa_SidType *attr_list = NULL;
 140         int i;
 141
 142         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 143                                  (const char **)&domain,
 144                                  (const char ***)&account_names, &attr_list))
 145         {
 146                 result = NT_STATUS_NONE_MAPPED;
 147                 goto done;
 148         }
 149
 150         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 151
 152         for (i=0; i<num_rids; i++) {
 153                 if (attrs[i] == SID_NAME_UNKNOWN) {
 154                         names[i] = NULL;
 155                 } else {
 156                         names[i] = talloc_strdup(names, account_names[i]);
 157                         if (names[i] == NULL) {
 158                                 result = NT_STATUS_NO_MEMORY;
 159                                 goto done;
 160                         }
 161
 162                 }
 163         }
 164
 165 done:
 166         TALLOC_FREE(account_names);
 167         TALLOC_FREE(domain);
 168         TALLOC_FREE(attr_list);
 169         return result;
 170 }
 171
 172 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t *value)
 173 {
 174         return NT_STATUS_UNSUCCESSFUL;
 175 }
 176
 177 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t value)
 178 {
 179         return NT_STATUS_UNSUCCESSFUL;
 180 }
 181
 182 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 183                                       struct pdb_search *search)
 184 {
 185         return false;
 186 }
 187
 188 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 189                                        struct pdb_search *search,
 190                                        const struct dom_sid *sid)
 191 {
 192
 193         return false;
 194 }
 195
 196 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 197                                           const char *domain,
 198                                           char **pwd,
 199                                           struct dom_sid *sid,
 200                                           time_t *pass_last_set_time)
 201 {
 202         return false;
 203
 204 }
 205
 206 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 207                                           const char *domain,
 208                                           const char *pwd,
 209                                           const struct dom_sid *sid)
 210 {
 211         return false;
 212 }
 213
 214 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 215                                           const char *domain)
 216 {
 217         return false;
 218 }
 219
 220 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 221                                              TALLOC_CTX *mem_ctx,
 222                                              uint32 *num_domains,
 223                                              struct trustdom_info ***domains)
 224 {
 225         return NT_STATUS_NOT_IMPLEMENTED;
 226 }
 227
 228 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)
 229 {
 230         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 231                 domain, *lp_winbind_separator(), name);
 232         map->sid_name_use = name_type;
 233         map->sid = *sid;
 234         map->gid = gid;
 235         return true;
 236 }
 237
 238 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 239                                  struct dom_sid sid)
 240 {
 241         NTSTATUS result = NT_STATUS_OK;
 242         char *name = NULL;
 243         char *domain = NULL;
 244         enum lsa_SidType name_type;
 245         gid_t gid;
 246
 247         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 248                                 (const char **) &name, &name_type)) {
 249                 result = NT_STATUS_NO_SUCH_GROUP;
 250                 goto done;
 251         }
 252
 253         if ((name_type != SID_NAME_DOM_GRP) &&
 254             (name_type != SID_NAME_DOMAIN) &&
 255             (name_type != SID_NAME_ALIAS) &&
 256             (name_type != SID_NAME_WKN_GRP)) {
 257                 result = NT_STATUS_NO_SUCH_GROUP;
 258                 goto done;
 259         }
 260
 261         if (!winbind_sid_to_gid(&gid, &sid)) {
 262                 result = NT_STATUS_NO_SUCH_GROUP;
 263                 goto done;
 264         }
 265
 266         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 267                 result = NT_STATUS_NO_SUCH_GROUP;
 268                 goto done;
 269         }
 270
 271 done:
 272         TALLOC_FREE(name);
 273         TALLOC_FREE(domain);
 274         return result;
 275 }
 276
 277 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 278                                  gid_t gid)
 279 {
 280         NTSTATUS result = NT_STATUS_OK;
 281         char *name = NULL;
 282         char *domain = NULL;
 283         struct dom_sid sid;
 284         enum lsa_SidType name_type;
 285
 286         if (!winbind_gid_to_sid(&sid, gid)) {
 287                 result = NT_STATUS_NO_SUCH_GROUP;
 288                 goto done;
 289         }
 290
 291         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 292                                 (const char **)&name, &name_type)) {
 293                 result = NT_STATUS_NO_SUCH_GROUP;
 294                 goto done;
 295         }
 296
 297         if ((name_type != SID_NAME_DOM_GRP) &&
 298             (name_type != SID_NAME_DOMAIN) &&
 299             (name_type != SID_NAME_ALIAS) &&
 300             (name_type != SID_NAME_WKN_GRP)) {
 301                 result = NT_STATUS_NO_SUCH_GROUP;
 302                 goto done;
 303         }
 304
 305         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 306                 result = NT_STATUS_NO_SUCH_GROUP;
 307                 goto done;
 308         }
 309
 310 done:
 311         TALLOC_FREE(name);
 312         TALLOC_FREE(domain);
 313
 314         return result;
 315 }
 316
 317 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 318                                  const char *name)
 319 {
 320         NTSTATUS result = NT_STATUS_OK;
 321         const char *domain = "";
 322         struct dom_sid sid;
 323         gid_t gid;
 324         enum lsa_SidType name_type;
 325
 326         if (!winbind_lookup_name(domain, name, &sid, &name_type)) {
 327                 result = NT_STATUS_NO_SUCH_GROUP;
 328                 goto done;
 329         }
 330
 331         if ((name_type != SID_NAME_DOM_GRP) &&
 332             (name_type != SID_NAME_DOMAIN) &&
 333             (name_type != SID_NAME_ALIAS) &&
 334             (name_type != SID_NAME_WKN_GRP)) {
 335                 result = NT_STATUS_NO_SUCH_GROUP;
 336                 goto done;
 337         }
 338
 339         if (!winbind_sid_to_gid(&gid, &sid)) {
 340                 result = NT_STATUS_NO_SUCH_GROUP;
 341                 goto done;
 342         }
 343
 344         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 345                 result = NT_STATUS_NO_SUCH_GROUP;
 346                 goto done;
 347         }
 348
 349 done:
 350
 351         return result;
 352 }
 353
 354 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 355                                            const struct dom_sid *sid, enum lsa_SidType sid_name_use,
 356                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 357                                            bool unix_only)
 358 {
 359         return NT_STATUS_NOT_IMPLEMENTED;
 360 }
 361
 362 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 363                                    const struct dom_sid *sid,
 364                                    struct acct_info *info)
 365 {
 366         return NT_STATUS_NOT_IMPLEMENTED;
 367 }
 368
 369 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 370                                           const struct dom_sid *alias,
 371                                           TALLOC_CTX *mem_ctx,
 372                                           struct dom_sid **pp_members,
 373                                           size_t *p_num_members)
 374 {
 375         return NT_STATUS_NOT_IMPLEMENTED;
 376 }
 377
 378 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 379                                        TALLOC_CTX *mem_ctx,
 380                                        const struct dom_sid *domain_sid,
 381                                        const struct dom_sid *members,
 382                                        size_t num_members,
 383                                        uint32 **pp_alias_rids,
 384                                        size_t *p_num_alias_rids)
 385 {
 386         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 387                     members, num_members, pp_alias_rids, p_num_alias_rids))
 388                 return NT_STATUS_UNSUCCESSFUL;
 389
 390         return NT_STATUS_OK;
 391 }
 392
 393 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 394 {
 395         NTSTATUS result;
 396
 397         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 398                 return result;
 399         }
 400
 401         (*pdb_method)->name = "wbc_sam";
 402
 403         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 404         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 405
 406         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 407         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 408         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 409         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 410         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 411         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 412         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 413         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 414         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 415         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 416         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 417         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 418         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 419         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 420
 421         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 422         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 423
 424         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 425         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 426         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 427         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 428
 429         (*pdb_method)->private_data = NULL;
 430         (*pdb_method)->free_private_data = NULL;
 431
 432         return NT_STATUS_OK;
 433 }
 434
 435 NTSTATUS pdb_wbc_sam_init(void)
 436 {
 437         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 438 }