source3/lib/util_nttoken.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Authentication utility functions
   4  *  Copyright (C) Andrew Tridgell 1992-1998
   5  *  Copyright (C) Andrew Bartlett 2001
   6  *  Copyright (C) Jeremy Allison 2000-2001
   7  *  Copyright (C) Rafal Szczesniak 2002
   8  *  Copyright (C) Volker Lendecke 2006
   9  *  Copyright (C) Michael Adam 2007
  10  *  Copyright (C) Guenther Deschner 2007
  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 /* function(s) moved from auth/auth_util.c to minimize linker deps */
  27
  28 #include "includes.h"
  29
  30 /****************************************************************************
  31  Duplicate a SID token.
  32 ****************************************************************************/
  33
  34 NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, const NT_USER_TOKEN *ptoken)
  35 {
  36         NT_USER_TOKEN *token;
  37
  38         if (!ptoken)
  39                 return NULL;
  40
  41         token = TALLOC_ZERO_P(mem_ctx, NT_USER_TOKEN);
  42         if (token == NULL) {
  43                 DEBUG(0, ("talloc failed\n"));
  44                 return NULL;
  45         }
  46
  47         if (ptoken->user_sids && ptoken->num_sids) {
  48                 token->user_sids = (struct dom_sid *)talloc_memdup(
  49                         token, ptoken->user_sids, sizeof(struct dom_sid) * ptoken->num_sids );
  50
  51                 if (token->user_sids == NULL) {
  52                         DEBUG(0, ("talloc_memdup failed\n"));
  53                         TALLOC_FREE(token);
  54                         return NULL;
  55                 }
  56                 token->num_sids = ptoken->num_sids;
  57         }
  58
  59         /* copy the privileges; don't consider failure to be critical here */
  60
  61         if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
  62                 DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!.  "
  63                          "Continuing with 0 privileges assigned.\n"));
  64         }
  65
  66         return token;
  67 }
  68
  69 /****************************************************************************
  70  merge NT tokens
  71 ****************************************************************************/
  72
  73 NTSTATUS merge_nt_token(TALLOC_CTX *mem_ctx,
  74                         const struct nt_user_token *token_1,
  75                         const struct nt_user_token *token_2,
  76                         struct nt_user_token **token_out)
  77 {
  78         struct nt_user_token *token = NULL;
  79         NTSTATUS status;
  80         int i;
  81
  82         if (!token_1 || !token_2 || !token_out) {
  83                 return NT_STATUS_INVALID_PARAMETER;
  84         }
  85
  86         token = TALLOC_ZERO_P(mem_ctx, struct nt_user_token);
  87         NT_STATUS_HAVE_NO_MEMORY(token);
  88
  89         for (i=0; i < token_1->num_sids; i++) {
  90                 status = add_sid_to_array_unique(mem_ctx,
  91                                                  &token_1->user_sids[i],
  92                                                  &token->user_sids,
  93                                                  &token->num_sids);
  94                 if (!NT_STATUS_IS_OK(status)) {
  95                         TALLOC_FREE(token);
  96                         return status;
  97                 }
  98         }
  99
 100         for (i=0; i < token_2->num_sids; i++) {
 101                 status = add_sid_to_array_unique(mem_ctx,
 102                                                  &token_2->user_sids[i],
 103                                                  &token->user_sids,
 104                                                  &token->num_sids);
 105                 if (!NT_STATUS_IS_OK(status)) {
 106                         TALLOC_FREE(token);
 107                         return status;
 108                 }
 109         }
 110
 111         se_priv_add(&token->privileges, &token_1->privileges);
 112         se_priv_add(&token->privileges, &token_2->privileges);
 113
 114         *token_out = token;
 115
 116         return NT_STATUS_OK;
 117 }
 118
 119 /*******************************************************************
 120  Check if this struct security_ace has a SID in common with the token.
 121 ********************************************************************/
 122
 123 bool token_sid_in_ace(const NT_USER_TOKEN *token, const struct security_ace *ace)
 124 {
 125         size_t i;
 126
 127         for (i = 0; i < token->num_sids; i++) {
 128                 if (sid_equal(&ace->trustee, &token->user_sids[i]))
 129                         return true;
 130         }
 131
 132         return false;
 133 }