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 #include "../libcli/security/dom_sid.h"
  30
  31 /****************************************************************************
  32  Duplicate a SID token.
  33 ****************************************************************************/
  34
  35 struct security_token *dup_nt_token(TALLOC_CTX *mem_ctx, const struct security_token *ptoken)
  36 {
  37         struct security_token *token;
  38
  39         if (!ptoken)
  40                 return NULL;
  41
  42         token = TALLOC_ZERO_P(mem_ctx, struct security_token);
  43         if (token == NULL) {
  44                 DEBUG(0, ("talloc failed\n"));
  45                 return NULL;
  46         }
  47
  48         if (ptoken->sids && ptoken->num_sids) {
  49                 token->sids = (struct dom_sid *)talloc_memdup(
  50                         token, ptoken->sids, sizeof(struct dom_sid) * ptoken->num_sids );
  51
  52                 if (token->sids == NULL) {
  53                         DEBUG(0, ("talloc_memdup failed\n"));
  54                         TALLOC_FREE(token);
  55                         return NULL;
  56                 }
  57                 token->num_sids = ptoken->num_sids;
  58         }
  59
  60         token->privilege_mask = ptoken->privilege_mask;
  61
  62         return token;
  63 }
  64
  65 /****************************************************************************
  66  merge NT tokens
  67 ****************************************************************************/
  68
  69 NTSTATUS merge_nt_token(TALLOC_CTX *mem_ctx,
  70                         const struct security_token *token_1,
  71                         const struct security_token *token_2,
  72                         struct security_token **token_out)
  73 {
  74         struct security_token *token = NULL;
  75         NTSTATUS status;
  76         int i;
  77
  78         if (!token_1 || !token_2 || !token_out) {
  79                 return NT_STATUS_INVALID_PARAMETER;
  80         }
  81
  82         token = TALLOC_ZERO_P(mem_ctx, struct security_token);
  83         NT_STATUS_HAVE_NO_MEMORY(token);
  84
  85         for (i=0; i < token_1->num_sids; i++) {
  86                 status = add_sid_to_array_unique(mem_ctx,
  87                                                  &token_1->sids[i],
  88                                                  &token->sids,
  89                                                  &token->num_sids);
  90                 if (!NT_STATUS_IS_OK(status)) {
  91                         TALLOC_FREE(token);
  92                         return status;
  93                 }
  94         }
  95
  96         for (i=0; i < token_2->num_sids; i++) {
  97                 status = add_sid_to_array_unique(mem_ctx,
  98                                                  &token_2->sids[i],
  99                                                  &token->sids,
 100                                                  &token->num_sids);
 101                 if (!NT_STATUS_IS_OK(status)) {
 102                         TALLOC_FREE(token);
 103                         return status;
 104                 }
 105         }
 106
 107         token->privilege_mask |= token_1->privilege_mask;
 108         token->privilege_mask |= token_2->privilege_mask;
 109
 110         *token_out = token;
 111
 112         return NT_STATUS_OK;
 113 }
 114
 115 /*******************************************************************
 116  Check if this struct security_ace has a SID in common with the token.
 117 ********************************************************************/
 118
 119 bool token_sid_in_ace(const struct security_token *token, const struct security_ace *ace)
 120 {
 121         size_t i;
 122
 123         for (i = 0; i < token->num_sids; i++) {
 124                 if (dom_sid_equal(&ace->trustee, &token->sids[i]))
 125                         return true;
 126         }
 127
 128         return false;
 129 }