testsuite/smbd/se_access_check_utils.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Security context tests
   5    Copyright (C) Tim Potter 2000
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "se_access_check_utils.h"
  23
  24 void char_to_sid(struct dom_sid *sid, char *sid_str)
  25 {
  26         /* If it looks like a SID, call string_to_sid() else look it up
  27            using wbinfo. */
  28
  29         if (strncmp(sid_str, "S-", 2) == 0) {
  30                 string_to_sid(sid, sid_str);
  31         } else {
  32                 struct winbindd_request request;
  33                 struct winbindd_response response;
  34
  35                 /* Send off request */
  36
  37                 ZERO_STRUCT(request);
  38                 ZERO_STRUCT(response);
  39
  40                 fstrcpy(request.data.name, sid_str);
  41                 if (winbindd_request(WINBINDD_LOOKUPNAME, &request,
  42                                      &response) != NSS_STATUS_SUCCESS) {
  43                         printf("FAIL: unable to look up sid for name %s\n",
  44                                sid_str);
  45                         exit(1);
  46                 }
  47
  48                 string_to_sid(sid, response.data.sid.sid);
  49                 printf("converted char %s to sid %s\n", sid_str,
  50                        response.data.sid.sid);
  51         }
  52 }
  53
  54 /* Construct an ACL from a list of ace_entry structures */
  55
  56 SEC_ACL *build_acl(struct ace_entry *ace_list)
  57 {
  58         SEC_ACE *aces = NULL;
  59         SEC_ACL *result;
  60         int num_aces = 0;
  61
  62         if (ace_list == NULL) return NULL;
  63
  64         /* Create aces */
  65
  66         while(ace_list->sid) {
  67                 SEC_ACCESS sa;
  68                 struct dom_sid sid;
  69
  70                 /* Create memory for new ACE */
  71
  72                 if (!(aces = Realloc(aces,
  73                                      sizeof(SEC_ACE) * (num_aces + 1)))) {
  74                         return NULL;
  75                 }
  76
  77                 /* Create ace */
  78
  79                 init_sec_access(&sa, ace_list->mask);
  80
  81                 char_to_sid(&sid, ace_list->sid);
  82                 init_sec_ace(&aces[num_aces], &sid, ace_list->type,
  83                              sa, ace_list->flags);
  84
  85                 num_aces++;
  86                 ace_list++;
  87         }
  88
  89         /* Create ACL from list of ACEs */
  90
  91         result = make_sec_acl(ACL_REVISION, num_aces, aces);
  92         free(aces);
  93
  94         return result;
  95 }
  96
  97 /* Make a security descriptor */
  98
  99 SEC_DESC *build_sec_desc(struct ace_entry *dacl, struct ace_entry *sacl,
 100                          char *owner_sid, char *group_sid)
 101 {
 102         struct dom_sid the_owner_sid, the_group_sid;
 103         SEC_ACL *the_dacl, *the_sacl;
 104         SEC_DESC *result;
 105         size_t size;
 106
 107         /* Build up bits of security descriptor */
 108
 109         char_to_sid(&the_owner_sid, owner_sid);
 110         char_to_sid(&the_group_sid, group_sid);
 111
 112         the_dacl = build_acl(dacl);
 113         the_sacl = build_acl(sacl);
 114
 115         result =  make_sec_desc(SEC_DESC_REVISION,
 116                                 SEC_DESC_SELF_RELATIVE | SEC_DESC_DACL_PRESENT,
 117                                 &the_owner_sid, &the_group_sid,
 118                                 the_sacl, the_dacl, &size);
 119
 120         free_sec_acl(&the_dacl);
 121         free_sec_acl(&the_sacl);
 122
 123         return result;
 124 }
 125
 126 /* Iterate over password database and call a user-specified function */
 127
 128 void visit_pwdb(BOOL (*fn)(struct passwd *pw, int ngroups, gid_t *groups))
 129 {
 130         struct passwd *pw;
 131         int ngroups;
 132         gid_t *groups;
 133
 134         setpwent();
 135
 136         while ((pw = getpwent())) {
 137                 BOOL result;
 138
 139                 /* Get grouplist */
 140
 141                 ngroups = getgroups(0, NULL);
 142
 143                 groups = malloc(sizeof(gid_t) * ngroups);
 144                 getgroups(ngroups, groups);
 145
 146                 /* Call function */
 147
 148                 result = fn(pw, ngroups, groups);
 149                 if (!result) break;
 150
 151                 /* Clean up */
 152
 153                 free(groups);
 154         }
 155
 156         endpwent();
 157 }