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
  44 /***************************************************************************
  45   Default implementations of some functions.
  46  ****************************************************************************/
  47 static NTSTATUS _pdb_wbc_sam_getsampw(struct pdb_methods *methods,
  48                                        struct samu *user,
  49                                        const struct passwd *pwd)
  50 {
  51         NTSTATUS result = NT_STATUS_OK;
  52
  53         if (pwd == NULL)
  54                 return NT_STATUS_NO_SUCH_USER;
  55
  56         ZERO_STRUCTP(user);
  57
  58         /* Can we really get away with this little of information */
  59         user->methods = methods;
  60         result = samu_set_unix(user, pwd);
  61
  62         return result;
  63 }
  64
  65 static NTSTATUS pdb_wbc_sam_getsampwnam(struct pdb_methods *methods, struct samu *user, const char *sname)
  66 {
  67         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwnam(sname));
  68 }
  69
  70 static NTSTATUS pdb_wbc_sam_getsampwsid(struct pdb_methods *methods, struct samu *user, const struct dom_sid *sid)
  71 {
  72         return _pdb_wbc_sam_getsampw(methods, user, winbind_getpwsid(sid));
  73 }
  74
  75 static bool pdb_wbc_sam_uid_to_sid(struct pdb_methods *methods, uid_t uid,
  76                                    struct dom_sid *sid)
  77 {
  78         return winbind_uid_to_sid(sid, uid);
  79 }
  80
  81 static bool pdb_wbc_sam_gid_to_sid(struct pdb_methods *methods, gid_t gid,
  82                                    struct dom_sid *sid)
  83 {
  84         return winbind_gid_to_sid(sid, gid);
  85 }
  86
  87 static NTSTATUS pdb_wbc_sam_enum_group_members(struct pdb_methods *methods,
  88                                                TALLOC_CTX *mem_ctx,
  89                                                const struct dom_sid *group,
  90                                                uint32 **pp_member_rids,
  91                                                size_t *p_num_members)
  92 {
  93         return NT_STATUS_NOT_IMPLEMENTED;
  94 }
  95
  96 static NTSTATUS pdb_wbc_sam_enum_group_memberships(struct pdb_methods *methods,
  97                                                    TALLOC_CTX *mem_ctx,
  98                                                    struct samu *user,
  99                                                    struct dom_sid **pp_sids,
 100                                                    gid_t **pp_gids,
 101                                                    uint32_t *p_num_groups)
 102 {
 103         size_t i;
 104         const char *username = pdb_get_username(user);
 105         uint32_t num_groups;
 106
 107         if (!winbind_get_groups(mem_ctx, username, &num_groups, pp_gids)) {
 108                 return NT_STATUS_NO_SUCH_USER;
 109         }
 110         *p_num_groups = num_groups;
 111
 112         if (*p_num_groups == 0) {
 113                 smb_panic("primary group missing");
 114         }
 115
 116         *pp_sids = talloc_array(mem_ctx, struct dom_sid, *p_num_groups);
 117
 118         if (*pp_sids == NULL) {
 119                 TALLOC_FREE(*pp_gids);
 120                 return NT_STATUS_NO_MEMORY;
 121         }
 122
 123         for (i=0; i < *p_num_groups; i++) {
 124                 gid_to_sid(&(*pp_sids)[i], (*pp_gids)[i]);
 125         }
 126
 127         return NT_STATUS_OK;
 128 }
 129
 130 static NTSTATUS pdb_wbc_sam_lookup_rids(struct pdb_methods *methods,
 131                                         const struct dom_sid *domain_sid,
 132                                         int num_rids,
 133                                         uint32 *rids,
 134                                         const char **names,
 135                                         enum lsa_SidType *attrs)
 136 {
 137         NTSTATUS result = NT_STATUS_OK;
 138         char *domain = NULL;
 139         char **account_names = NULL;
 140         enum lsa_SidType *attr_list = NULL;
 141         int i;
 142
 143         if (!winbind_lookup_rids(talloc_tos(), domain_sid, num_rids, rids,
 144                                  (const char **)&domain,
 145                                  (const char ***)&account_names, &attr_list))
 146         {
 147                 result = NT_STATUS_NONE_MAPPED;
 148                 goto done;
 149         }
 150
 151         memcpy(attrs, attr_list, num_rids * sizeof(enum lsa_SidType));
 152
 153         for (i=0; i<num_rids; i++) {
 154                 if (attrs[i] == SID_NAME_UNKNOWN) {
 155                         names[i] = NULL;
 156                 } else {
 157                         names[i] = talloc_strdup(names, account_names[i]);
 158                         if (names[i] == NULL) {
 159                                 result = NT_STATUS_NO_MEMORY;
 160                                 goto done;
 161                         }
 162
 163                 }
 164         }
 165
 166 done:
 167         TALLOC_FREE(account_names);
 168         TALLOC_FREE(domain);
 169         TALLOC_FREE(attr_list);
 170         return result;
 171 }
 172
 173 static NTSTATUS pdb_wbc_sam_get_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t *value)
 174 {
 175         return NT_STATUS_UNSUCCESSFUL;
 176 }
 177
 178 static NTSTATUS pdb_wbc_sam_set_account_policy(struct pdb_methods *methods, enum pdb_policy_type type, uint32_t value)
 179 {
 180         return NT_STATUS_UNSUCCESSFUL;
 181 }
 182
 183 static bool pdb_wbc_sam_search_groups(struct pdb_methods *methods,
 184                                       struct pdb_search *search)
 185 {
 186         return false;
 187 }
 188
 189 static bool pdb_wbc_sam_search_aliases(struct pdb_methods *methods,
 190                                        struct pdb_search *search,
 191                                        const struct dom_sid *sid)
 192 {
 193
 194         return false;
 195 }
 196
 197 static bool pdb_wbc_sam_get_trusteddom_pw(struct pdb_methods *methods,
 198                                           const char *domain,
 199                                           char **pwd,
 200                                           struct dom_sid *sid,
 201                                           time_t *pass_last_set_time)
 202 {
 203         return false;
 204
 205 }
 206
 207 static bool pdb_wbc_sam_set_trusteddom_pw(struct pdb_methods *methods,
 208                                           const char *domain,
 209                                           const char *pwd,
 210                                           const struct dom_sid *sid)
 211 {
 212         return false;
 213 }
 214
 215 static bool pdb_wbc_sam_del_trusteddom_pw(struct pdb_methods *methods,
 216                                           const char *domain)
 217 {
 218         return false;
 219 }
 220
 221 static NTSTATUS pdb_wbc_sam_enum_trusteddoms(struct pdb_methods *methods,
 222                                              TALLOC_CTX *mem_ctx,
 223                                              uint32 *num_domains,
 224                                              struct trustdom_info ***domains)
 225 {
 226         return NT_STATUS_NOT_IMPLEMENTED;
 227 }
 228
 229 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)
 230 {
 231         snprintf(map->nt_name, sizeof(map->nt_name), "%s%c%s",
 232                 domain, *lp_winbind_separator(), name);
 233         map->sid_name_use = name_type;
 234         map->sid = *sid;
 235         map->gid = gid;
 236         return true;
 237 }
 238
 239 static NTSTATUS pdb_wbc_sam_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
 240                                  struct dom_sid sid)
 241 {
 242         NTSTATUS result = NT_STATUS_OK;
 243         char *name = NULL;
 244         char *domain = NULL;
 245         enum lsa_SidType name_type;
 246         gid_t gid;
 247
 248         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 249                                 (const char **) &name, &name_type)) {
 250                 result = NT_STATUS_NO_SUCH_GROUP;
 251                 goto done;
 252         }
 253
 254         if ((name_type != SID_NAME_DOM_GRP) &&
 255             (name_type != SID_NAME_DOMAIN) &&
 256             (name_type != SID_NAME_ALIAS) &&
 257             (name_type != SID_NAME_WKN_GRP)) {
 258                 result = NT_STATUS_NO_SUCH_GROUP;
 259                 goto done;
 260         }
 261
 262         if (!winbind_sid_to_gid(&gid, &sid)) {
 263                 result = NT_STATUS_NO_SUCH_GROUP;
 264                 goto done;
 265         }
 266
 267         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 268                 result = NT_STATUS_NO_SUCH_GROUP;
 269                 goto done;
 270         }
 271
 272 done:
 273         TALLOC_FREE(name);
 274         TALLOC_FREE(domain);
 275         return result;
 276 }
 277
 278 static NTSTATUS pdb_wbc_sam_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
 279                                  gid_t gid)
 280 {
 281         NTSTATUS result = NT_STATUS_OK;
 282         char *name = NULL;
 283         char *domain = NULL;
 284         struct dom_sid sid;
 285         enum lsa_SidType name_type;
 286
 287         if (!winbind_gid_to_sid(&sid, gid)) {
 288                 result = NT_STATUS_NO_SUCH_GROUP;
 289                 goto done;
 290         }
 291
 292         if (!winbind_lookup_sid(talloc_tos(), &sid, (const char **)&domain,
 293                                 (const char **)&name, &name_type)) {
 294                 result = NT_STATUS_NO_SUCH_GROUP;
 295                 goto done;
 296         }
 297
 298         if ((name_type != SID_NAME_DOM_GRP) &&
 299             (name_type != SID_NAME_DOMAIN) &&
 300             (name_type != SID_NAME_ALIAS) &&
 301             (name_type != SID_NAME_WKN_GRP)) {
 302                 result = NT_STATUS_NO_SUCH_GROUP;
 303                 goto done;
 304         }
 305
 306         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 307                 result = NT_STATUS_NO_SUCH_GROUP;
 308                 goto done;
 309         }
 310
 311 done:
 312         TALLOC_FREE(name);
 313         TALLOC_FREE(domain);
 314
 315         return result;
 316 }
 317
 318 static NTSTATUS pdb_wbc_sam_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
 319                                  const char *name)
 320 {
 321         NTSTATUS result = NT_STATUS_OK;
 322         const char *domain = "";
 323         struct dom_sid sid;
 324         gid_t gid;
 325         enum lsa_SidType name_type;
 326
 327         if (!winbind_lookup_name(domain, name, &sid, &name_type)) {
 328                 result = NT_STATUS_NO_SUCH_GROUP;
 329                 goto done;
 330         }
 331
 332         if ((name_type != SID_NAME_DOM_GRP) &&
 333             (name_type != SID_NAME_DOMAIN) &&
 334             (name_type != SID_NAME_ALIAS) &&
 335             (name_type != SID_NAME_WKN_GRP)) {
 336                 result = NT_STATUS_NO_SUCH_GROUP;
 337                 goto done;
 338         }
 339
 340         if (!winbind_sid_to_gid(&gid, &sid)) {
 341                 result = NT_STATUS_NO_SUCH_GROUP;
 342                 goto done;
 343         }
 344
 345         if (!_make_group_map(methods, domain, name, name_type, gid, &sid, map)) {
 346                 result = NT_STATUS_NO_SUCH_GROUP;
 347                 goto done;
 348         }
 349
 350 done:
 351
 352         return result;
 353 }
 354
 355 static NTSTATUS pdb_wbc_sam_enum_group_mapping(struct pdb_methods *methods,
 356                                            const struct dom_sid *sid, enum lsa_SidType sid_name_use,
 357                                            GROUP_MAP **pp_rmap, size_t *p_num_entries,
 358                                            bool unix_only)
 359 {
 360         return NT_STATUS_NOT_IMPLEMENTED;
 361 }
 362
 363 static NTSTATUS pdb_wbc_sam_get_aliasinfo(struct pdb_methods *methods,
 364                                    const struct dom_sid *sid,
 365                                    struct acct_info *info)
 366 {
 367         return NT_STATUS_NOT_IMPLEMENTED;
 368 }
 369
 370 static NTSTATUS pdb_wbc_sam_enum_aliasmem(struct pdb_methods *methods,
 371                                           const struct dom_sid *alias,
 372                                           TALLOC_CTX *mem_ctx,
 373                                           struct dom_sid **pp_members,
 374                                           size_t *p_num_members)
 375 {
 376         return NT_STATUS_NOT_IMPLEMENTED;
 377 }
 378
 379 static NTSTATUS pdb_wbc_sam_alias_memberships(struct pdb_methods *methods,
 380                                        TALLOC_CTX *mem_ctx,
 381                                        const struct dom_sid *domain_sid,
 382                                        const struct dom_sid *members,
 383                                        size_t num_members,
 384                                        uint32 **pp_alias_rids,
 385                                        size_t *p_num_alias_rids)
 386 {
 387         if (!winbind_get_sid_aliases(mem_ctx, domain_sid,
 388                     members, num_members, pp_alias_rids, p_num_alias_rids))
 389                 return NT_STATUS_UNSUCCESSFUL;
 390
 391         return NT_STATUS_OK;
 392 }
 393
 394 static NTSTATUS pdb_init_wbc_sam(struct pdb_methods **pdb_method, const char *location)
 395 {
 396         NTSTATUS result;
 397
 398         if (!NT_STATUS_IS_OK(result = make_pdb_method( pdb_method))) {
 399                 return result;
 400         }
 401
 402         (*pdb_method)->name = "wbc_sam";
 403
 404         (*pdb_method)->getsampwnam = pdb_wbc_sam_getsampwnam;
 405         (*pdb_method)->getsampwsid = pdb_wbc_sam_getsampwsid;
 406
 407         (*pdb_method)->getgrsid = pdb_wbc_sam_getgrsid;
 408         (*pdb_method)->getgrgid = pdb_wbc_sam_getgrgid;
 409         (*pdb_method)->getgrnam = pdb_wbc_sam_getgrnam;
 410         (*pdb_method)->enum_group_mapping = pdb_wbc_sam_enum_group_mapping;
 411         (*pdb_method)->enum_group_members = pdb_wbc_sam_enum_group_members;
 412         (*pdb_method)->enum_group_memberships = pdb_wbc_sam_enum_group_memberships;
 413         (*pdb_method)->get_aliasinfo = pdb_wbc_sam_get_aliasinfo;
 414         (*pdb_method)->enum_aliasmem = pdb_wbc_sam_enum_aliasmem;
 415         (*pdb_method)->enum_alias_memberships = pdb_wbc_sam_alias_memberships;
 416         (*pdb_method)->lookup_rids = pdb_wbc_sam_lookup_rids;
 417         (*pdb_method)->get_account_policy = pdb_wbc_sam_get_account_policy;
 418         (*pdb_method)->set_account_policy = pdb_wbc_sam_set_account_policy;
 419         (*pdb_method)->uid_to_sid = pdb_wbc_sam_uid_to_sid;
 420         (*pdb_method)->gid_to_sid = pdb_wbc_sam_gid_to_sid;
 421
 422         (*pdb_method)->search_groups = pdb_wbc_sam_search_groups;
 423         (*pdb_method)->search_aliases = pdb_wbc_sam_search_aliases;
 424
 425         (*pdb_method)->get_trusteddom_pw = pdb_wbc_sam_get_trusteddom_pw;
 426         (*pdb_method)->set_trusteddom_pw = pdb_wbc_sam_set_trusteddom_pw;
 427         (*pdb_method)->del_trusteddom_pw = pdb_wbc_sam_del_trusteddom_pw;
 428         (*pdb_method)->enum_trusteddoms  = pdb_wbc_sam_enum_trusteddoms;
 429
 430         (*pdb_method)->private_data = NULL;
 431         (*pdb_method)->free_private_data = NULL;
 432
 433         return NT_STATUS_OK;
 434 }
 435
 436 NTSTATUS pdb_wbc_sam_init(void)
 437 {
 438         return smb_register_passdb(PASSDB_INTERFACE_VERSION, "wbc_sam", pdb_init_wbc_sam);
 439 }