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 #include "passdb/pdb_wbc_sam.h"
  43 #include "idmap.h"
  44
  45 /***************************************************************************
  46   Default implementations of some functions.
  47  ****************************************************************************/
  48 static NTSTATUS _pdb_wbc_sam_getsampw(struct pdb_methods *methods,
  49                                        struct samu *user,
  50                                        const struct passwd *pwd)
  51 {
  52         NTSTATUS result = NT_STATUS_OK;
  53
  54         if (pwd == NULL)
  55                 return NT_STATUS_NO_SUCH_USER;
  56
  57         ZERO_STRUCTP(user);
  58
  59         /* Can we really get away with this little of information */
  60         user->methods = methods;
  61         result = samu_set_unix(user, pwd);
  62
  63         return result;
  64 }
  65
  66 static NTSTATUS pdb_wbc_sam_getsampwnam(struct pdb_methods *methods, struct samu *user, const char *sname)
  67 {
  68         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwnam(sname));
  69 }
  70
  71 static NTSTATUS pdb_wbc_sam_getsampwsid(struct pdb_methods *methods, struct samu *user, const struct dom_sid *sid)
  72 {
  73         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwsid(sid));
  74 }
  75
  76 static bool pdb_wbc_sam_id_to_sid(struct pdb_methods *methods, struct unixid *id,
  77                                   struct dom_sid *sid)
  78 {
  79         switch (id->type) {
  80         case ID_TYPE_UID:
  81                 return winbind_uid_to_sid(sid, id->id);
  82
  83         case ID_TYPE_GID:
  84                 return winbind_gid_to_sid(sid, id->id);
  85
  86         default:
  87                 return false;
  88         }
  89 }
  90
  91 static NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
  92                                                TALLOC_CTX *mem_ctx,
  93                                                const struct dom_sid *group,
  94                                                uint32_t **pp_member_rids,
  95                                                size_t *p_num_members)
  96 {
  97         return NT_STATUS_NOT_IMPLEMENTED;
  98 }
  99
 100 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
 101                                                    TALLOC_CTX *mem_ctx,
 102                                                    struct samu *user,
 103                                                    struct dom_sid **pp_sids,
 104                                                    gid_t **pp_gids,
 105                                                    uint32_t *p_num_groups)
 106 {
 107         size_t i;
 108         const char *username = pdb_get_username(user);
 109         uint32_t num_groups;
 110
 111         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 112                 return NT_STATUS_NO_SUCH_USER;
 113         }
 114         *p_num_groups = num_groups;
 115
 116         if (*p_num_groups == 0) {
 117                 smb_panic("primary group missing");
 118         }
 119
 120         *pp_sids = talloc_array(mem_ctx, struct dom_sid, *p_num_groups);
 121
 122         if (*pp_sids == NULL) {
 123                 TALLOC_FREE(*pp_gids);
 124                 return NT_STATUS_NO_MEMORY;
 125         }
 126
 127         for (i=0; i < *p_num_groups; i++) {
 128                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 129         }
 130
 131         return NT_STATUS_OK;
 132 }
 133
 134 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 135                                         const struct dom_sid *domain_sid,
 136                                         int num_rids,
 137                                         uint32_t *rids,
 138                                         const char **names,
 139                                         enum lsa_SidType *attrs)
 140 {
 141         NTSTATUS result = NT_STATUS_OK;
 142         const char *p = NULL;
 143         const char **pp = NULL;
 144         char *domain = NULL;
 145         char **account_names = NULL;
 146         enum lsa_SidType *attr_list = NULL;
 147         int i;
 148
 149         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 150                                  &p, &pp, &attr_list))
 151         {
 152                 result = NT_STATUS_NONE_MAPPED;
 153                 goto done;
 154         }
 155         domain = discard_const_p(char, p);
 156         account_names = discard_const_p(char *, pp);
 157
 158         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 159
 160         for (i=0; i<num_rids; i++) {
 161                 if (attrs[i] == SID_NAME_UNKNOWN) {
 162                         names[i] = NULL;
 163                 } else {
 164                         names[i] = talloc_strdup(names, account_names[i]);
 165                         if (names[i] == NULL) {
 166                                 result = NT_STATUS_NO_MEMORY;
 167                                 goto done;
 168                         }
 169
 170                 }
 171         }
 172
 173 done:
 174         TALLOC_FREE(account_names);
 175         TALLOC_FREE(domain);
 176         TALLOC_FREE(attr_list);
 177         return result;
 178 }
 179
 180 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t *value)
 181 {
 182         return NT_STATUS_UNSUCCESSFUL;
 183 }
 184
 185 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t value)
 186 {
 187         return NT_STATUS_UNSUCCESSFUL;
 188 }
 189
 190 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 191                                       struct pdb_search *search)
 192 {
 193         return false;
 194 }
 195
 196 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 197                                        struct pdb_search *search,
 198                                        const struct dom_sid *sid)
 199 {
 200
 201         return false;
 202 }
 203
 204 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 205                                           const char *domain,
 206                                           char **pwd,
 207                                           struct dom_sid *sid,
 208                                           time_t *pass_last_set_time)
 209 {
 210         return false;
 211
 212 }
 213
 214 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 215                                           const char *domain,
 216                                           const char *pwd,
 217                                           const struct dom_sid *sid)
 218 {
 219         return false;
 220 }
 221
 222 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 223                                           const char *domain)
 224 {
 225         return false;
 226 }
 227
 228 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 229                                              TALLOC_CTX *mem_ctx,
 230                                              uint32_t *num_domains,
 231                                              struct trustdom_info ***domains)
 232 {
 233         return NT_STATUS_NOT_IMPLEMENTED;
 234 }
 235
 236 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)
 237 {
 238         map->nt_name = talloc_asprintf(map, "%s%c%s",
 239                 domain, *lp_winbind_separator(), name);
 240         if (!map->nt_name) {
 241                 return false;
 242         }
 243         map->sid_name_use = name_type;
 244         map->sid = *sid;
 245         map->gid = gid;
 246         return true;
 247 }
 248
 249 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 250                                  struct dom_sid sid)
 251 {
 252         NTSTATUS result = NT_STATUS_OK;
 253         const char *p1 = NULL, *p2 = NULL;
 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, &p1, &p2, &name_type)) {
 260                 result = NT_STATUS_NO_SUCH_GROUP;
 261                 goto done;
 262         }
 263         domain = discard_const_p(char, p1);
 264         name = discard_const_p(char, p2);
 265
 266         if ((name_type != SID_NAME_DOM_GRP) &&
 267             (name_type != SID_NAME_DOMAIN) &&
 268             (name_type != SID_NAME_ALIAS) &&
 269             (name_type != SID_NAME_WKN_GRP)) {
 270                 result = NT_STATUS_NO_SUCH_GROUP;
 271                 goto done;
 272         }
 273
 274         if (!winbind_sid_to_gid(&gid, &sid)) {
 275                 result = NT_STATUS_NO_SUCH_GROUP;
 276                 goto done;
 277         }
 278
 279         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 280                 result = NT_STATUS_NO_SUCH_GROUP;
 281                 goto done;
 282         }
 283
 284 done:
 285         TALLOC_FREE(name);
 286         TALLOC_FREE(domain);
 287         return result;
 288 }
 289
 290 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 291                                  gid_t gid)
 292 {
 293         NTSTATUS result = NT_STATUS_OK;
 294         const char *p1 = NULL, *p2 = NULL;
 295         char *name = NULL;
 296         char *domain = NULL;
 297         struct dom_sid sid;
 298         enum lsa_SidType name_type;
 299
 300         if (!winbind_gid_to_sid(&sid, gid)) {
 301                 result = NT_STATUS_NO_SUCH_GROUP;
 302                 goto done;
 303         }
 304
 305         if (!winbind_lookup_sid(talloc_tos(), &sid, &p1, &p2, &name_type)) {
 306                 result = NT_STATUS_NO_SUCH_GROUP;
 307                 goto done;
 308         }
 309         domain = discard_const_p(char, p1);
 310         name = discard_const_p(char, p2);
 311
 312         if ((name_type != SID_NAME_DOM_GRP) &&
 313             (name_type != SID_NAME_DOMAIN) &&
 314             (name_type != SID_NAME_ALIAS) &&
 315             (name_type != SID_NAME_WKN_GRP)) {
 316                 result = NT_STATUS_NO_SUCH_GROUP;
 317                 goto done;
 318         }
 319
 320         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 321                 result = NT_STATUS_NO_SUCH_GROUP;
 322                 goto done;
 323         }
 324
 325 done:
 326         TALLOC_FREE(name);
 327         TALLOC_FREE(domain);
 328
 329         return result;
 330 }
 331
 332 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 333                                  const char *name)
 334 {
 335         NTSTATUS result = NT_STATUS_OK;
 336         const char *domain = "";
 337         struct dom_sid sid;
 338         gid_t gid;
 339         enum lsa_SidType name_type;
 340
 341         if (!winbind_lookup_name(domain, name, &sid, &name_type)) {
 342                 result = NT_STATUS_NO_SUCH_GROUP;
 343                 goto done;
 344         }
 345
 346         if ((name_type != SID_NAME_DOM_GRP) &&
 347             (name_type != SID_NAME_DOMAIN) &&
 348             (name_type != SID_NAME_ALIAS) &&
 349             (name_type != SID_NAME_WKN_GRP)) {
 350                 result = NT_STATUS_NO_SUCH_GROUP;
 351                 goto done;
 352         }
 353
 354         if (!winbind_sid_to_gid(&gid, &sid)) {
 355                 result = NT_STATUS_NO_SUCH_GROUP;
 356                 goto done;
 357         }
 358
 359         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 360                 result = NT_STATUS_NO_SUCH_GROUP;
 361                 goto done;
 362         }
 363
 364 done:
 365
 366         return result;
 367 }
 368
 369 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 370                                            const struct dom_sid *sid, enum lsa_SidType sid_name_use,
 371                                            GROUP_MAP ***pp_rmap, size_t *p_num_entries,
 372                                            bool unix_only)
 373 {
 374         return NT_STATUS_NOT_IMPLEMENTED;
 375 }
 376
 377 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 378                                    const struct dom_sid *sid,
 379                                    struct acct_info *info)
 380 {
 381         return NT_STATUS_NOT_IMPLEMENTED;
 382 }
 383
 384 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 385                                           const struct dom_sid *alias,
 386                                           TALLOC_CTX *mem_ctx,
 387                                           struct dom_sid **pp_members,
 388                                           size_t *p_num_members)
 389 {
 390         return NT_STATUS_NOT_IMPLEMENTED;
 391 }
 392
 393 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 394                                        TALLOC_CTX *mem_ctx,
 395                                        const struct dom_sid *domain_sid,
 396                                        const struct dom_sid *members,
 397                                        size_t num_members,
 398                                        uint32_t **pp_alias_rids,
 399                                        size_t *p_num_alias_rids)
 400 {
 401         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 402                     members, num_members, pp_alias_rids, p_num_alias_rids))
 403                 return NT_STATUS_UNSUCCESSFUL;
 404
 405         return NT_STATUS_OK;
 406 }
 407
 408 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 409 {
 410         NTSTATUS result;
 411
 412         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 413                 return result;
 414         }
 415
 416         (*pdb_method)->name = "wbc_sam";
 417
 418         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 419         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 420
 421         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 422         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 423         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 424         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 425         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 426         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 427         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 428         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 429         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 430         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 431         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 432         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 433         (*pdb_method)->id_to_sid = pdb_wbc_sam_id_to_sid;
 434
 435         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 436         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 437
 438         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 439         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 440         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 441         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 442
 443         (*pdb_method)->private_data = NULL;
 444         (*pdb_method)->free_private_data = NULL;
 445
 446         return NT_STATUS_OK;
 447 }
 448
 449 NTSTATUS pdb_wbc_sam_init(void)
 450 {
 451         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 452 }