source4/dsdb/samdb/samdb_privilege.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    manipulate privilege records in samdb
   5
   6    Copyright (C) Andrew Tridgell 2004
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/ldap/ldap_ndr.h"
  24 #include "dsdb/samdb/samdb.h"
  25 #include "auth/auth.h"
  26 #include "libcli/security/security.h"
  27 #include "../lib/util/util_ldb.h"
  28 #include "param/param.h"
  29 #include "ldb_wrap.h"
  30
  31 /* connect to the privilege database */
  32 struct ldb_context *privilege_connect(TALLOC_CTX *mem_ctx,
  33                                       struct tevent_context *ev_ctx,
  34                                       struct loadparm_context *lp_ctx)
  35 {
  36         return ldb_wrap_connect(mem_ctx, ev_ctx, lp_ctx, "privilege.ldb",
  37                                 NULL, NULL, 0);
  38 }
  39
  40 /*
  41   add privilege bits for one sid to a security_token
  42 */
  43 static NTSTATUS samdb_privilege_setup_sid(struct ldb_context *pdb, TALLOC_CTX *mem_ctx,
  44                                           struct security_token *token,
  45                                           const struct dom_sid *sid)
  46 {
  47         const char * const attrs[] = { "privilege", NULL };
  48         struct ldb_message **res = NULL;
  49         struct ldb_message_element *el;
  50         unsigned int i;
  51         int ret;
  52         char *sidstr;
  53
  54         sidstr = ldap_encode_ndr_dom_sid(mem_ctx, sid);
  55         NT_STATUS_HAVE_NO_MEMORY(sidstr);
  56
  57         ret = gendb_search(pdb, mem_ctx, NULL, &res, attrs, "objectSid=%s", sidstr);
  58         talloc_free(sidstr);
  59         if (ret != 1) {
  60                 /* not an error to not match */
  61                 return NT_STATUS_OK;
  62         }
  63
  64         el = ldb_msg_find_element(res[0], "privilege");
  65         if (el == NULL) {
  66                 return NT_STATUS_OK;
  67         }
  68
  69         for (i=0;i<el->num_values;i++) {
  70                 const char *priv_str = (const char *)el->values[i].data;
  71                 enum sec_privilege privilege = sec_privilege_id(priv_str);
  72                 if (privilege == SEC_PRIV_INVALID) {
  73                         uint32_t right_bit = sec_right_bit(priv_str);
  74                         security_token_set_right_bit(token, right_bit);
  75                         if (right_bit == 0) {
  76                                 DEBUG(1,("Unknown privilege '%s' in samdb\n",
  77                                          priv_str));
  78                         }
  79                         continue;
  80                 }
  81                 security_token_set_privilege(token, privilege);
  82         }
  83
  84         return NT_STATUS_OK;
  85 }
  86
  87 /*
  88   setup the privilege mask for this security token based on our
  89   local SAM
  90 */
  91 NTSTATUS samdb_privilege_setup(struct tevent_context *ev_ctx,
  92                                struct loadparm_context *lp_ctx, struct security_token *token)
  93 {
  94         struct ldb_context *pdb;
  95         TALLOC_CTX *mem_ctx;
  96         unsigned int i;
  97         NTSTATUS status;
  98
  99         /* Shortcuts to prevent recursion and avoid lookups */
 100         if (token->sids == NULL) {
 101                 token->privilege_mask = 0;
 102                 return NT_STATUS_OK;
 103         }
 104
 105         if (security_token_is_system(token)) {
 106                 token->privilege_mask = ~0;
 107                 return NT_STATUS_OK;
 108         }
 109
 110         if (security_token_is_anonymous(token)) {
 111                 token->privilege_mask = 0;
 112                 return NT_STATUS_OK;
 113         }
 114
 115         mem_ctx = talloc_new(token);
 116         pdb = privilege_connect(mem_ctx, ev_ctx, lp_ctx);
 117         if (pdb == NULL) {
 118                 talloc_free(mem_ctx);
 119                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 120         }
 121
 122         token->privilege_mask = 0;
 123
 124         for (i=0;i<token->num_sids;i++) {
 125                 status = samdb_privilege_setup_sid(pdb, mem_ctx,
 126                                                    token, &token->sids[i]);
 127                 if (!NT_STATUS_IS_OK(status)) {
 128                         talloc_free(mem_ctx);
 129                         return status;
 130                 }
 131         }
 132
 133         talloc_free(mem_ctx);
 134
 135         return NT_STATUS_OK;
 136 }