source4/auth/unix_token.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Deal with unix elements in the security token
   5
   6    Copyright (C) Andrew Tridgell 2004
   7    Copyright (C) Andrew Bartlett 2011
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "auth/auth.h"
  25 #include "libcli/wbclient/wbclient.h"
  26 #include "param/param.h"
  27
  28 /*
  29   form a security_unix_token from the current security_token
  30 */
  31 NTSTATUS security_token_to_unix_token(TALLOC_CTX *mem_ctx,
  32                                       struct wbc_context *wbc_ctx,
  33                                       struct security_token *token,
  34                                       struct security_unix_token **sec)
  35 {
  36         uint32_t s, g;
  37         NTSTATUS status;
  38         struct id_map *ids;
  39         struct composite_context *ctx;
  40
  41         /* we can't do unix security without a user and group */
  42         if (token->num_sids < 2) {
  43                 return NT_STATUS_ACCESS_DENIED;
  44         }
  45
  46         *sec = talloc_zero(mem_ctx, struct security_unix_token);
  47         if (*sec == NULL) {
  48                 return NT_STATUS_NO_MEMORY;
  49         }
  50
  51         ids = talloc_zero_array(mem_ctx, struct id_map, token->num_sids);
  52         NT_STATUS_HAVE_NO_MEMORY(ids);
  53
  54         for (s=0; s < token->num_sids; s++) {
  55                 ids[s].sid = &token->sids[s];
  56                 ids[s].status = ID_UNKNOWN;
  57         }
  58
  59         ctx = wbc_sids_to_xids_send(wbc_ctx, ids, token->num_sids, ids);
  60         NT_STATUS_HAVE_NO_MEMORY(ctx);
  61
  62         status = wbc_sids_to_xids_recv(ctx, &ids);
  63         NT_STATUS_NOT_OK_RETURN(status);
  64
  65         g = token->num_sids;
  66         if (ids[0].xid.type != ID_TYPE_BOTH) {
  67                 g--;
  68         }
  69         (*sec)->ngroups = g;
  70         (*sec)->groups = talloc_array(*sec, gid_t, (*sec)->ngroups);
  71         NT_STATUS_HAVE_NO_MEMORY((*sec)->groups);
  72
  73         g=0;
  74         if (ids[0].xid.type == ID_TYPE_BOTH) {
  75                 (*sec)->uid = ids[0].xid.id;
  76                 (*sec)->groups[g] = ids[0].xid.id;
  77                 g++;
  78         } else if (ids[0].xid.type == ID_TYPE_UID) {
  79                 (*sec)->uid = ids[0].xid.id;
  80         } else {
  81                 return NT_STATUS_INVALID_SID;
  82         }
  83
  84         if (ids[1].xid.type == ID_TYPE_BOTH ||
  85             ids[1].xid.type == ID_TYPE_GID) {
  86                 (*sec)->gid = ids[1].xid.id;
  87                 (*sec)->groups[g] = ids[1].xid.id;
  88                 g++;
  89         } else {
  90                 return NT_STATUS_INVALID_SID;
  91         }
  92
  93         for (s=2; s < token->num_sids; s++) {
  94                 if (ids[s].xid.type == ID_TYPE_BOTH ||
  95                     ids[s].xid.type == ID_TYPE_GID) {
  96                         (*sec)->groups[g] = ids[s].xid.id;
  97                         g++;
  98                 } else {
  99                         return NT_STATUS_INVALID_SID;
 100                 }
 101         }
 102
 103         TALLOC_FREE(ids);
 104
 105         return NT_STATUS_OK;
 106 }
 107
 108 /*
 109   Fill in the auth_user_info_unix and auth_unix_token elements in a struct session_info
 110 */
 111 NTSTATUS auth_session_info_fill_unix( struct wbc_context *wbc_ctx,
 112                                      struct loadparm_context *lp_ctx,
 113                                      struct auth_session_info *session_info)
 114 {
 115         char *su;
 116         size_t len;
 117         NTSTATUS status = security_token_to_unix_token(session_info, wbc_ctx,
 118                                                        session_info->security_token,
 119                                                        &session_info->unix_token);
 120         if (!NT_STATUS_IS_OK(status)) {
 121                 return status;
 122         }
 123
 124         session_info->unix_info = talloc_zero(session_info, struct auth_user_info_unix);
 125         NT_STATUS_HAVE_NO_MEMORY(session_info->unix_info);
 126
 127         session_info->unix_info->system = security_token_is_system(session_info->security_token);
 128
 129         session_info->unix_info->unix_name = talloc_asprintf(session_info->unix_info,
 130                                                              "%s%s%s", session_info->info->domain_name,
 131                                                              lpcfg_winbind_separator(lp_ctx),
 132                                                              session_info->info->account_name);
 133         NT_STATUS_HAVE_NO_MEMORY(session_info->unix_info->unix_name);
 134
 135         len = strlen(session_info->info->account_name) + 1;
 136         session_info->unix_info->sanitized_username = su = talloc_array(session_info->unix_info, char, len);
 137         NT_STATUS_HAVE_NO_MEMORY(su);
 138
 139         alpha_strcpy(su, session_info->info->account_name,
 140                      ". _-$", len);
 141
 142         return NT_STATUS_OK;
 143 }