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/*
* Unix SMB/Netbios implementation.
* SEC_ACL handling routines
* Copyright (C) Andrew Tridgell 1992-1998,
* Copyright (C) Jeremy R. Allison 1995-2003.
* Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
* Copyright (C) Paul Ashton 1997-1998.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_security.h"
#define SEC_ACL_HEADER_SIZE (2 * sizeof(uint16_t) + sizeof(uint32_t))
/*******************************************************************
Create a SEC_ACL structure.
********************************************************************/
struct security_acl *make_sec_acl(TALLOC_CTX *ctx,
enum security_acl_revision revision,
int num_aces, struct security_ace *ace_list)
{
struct security_acl *dst;
int i;
if((dst = talloc_zero(ctx, struct security_acl)) == NULL)
return NULL;
dst->revision = revision;
dst->num_aces = num_aces;
dst->size = SEC_ACL_HEADER_SIZE;
/* Now we need to return a non-NULL address for the ace list even
if the number of aces required is zero. This is because there
is a distinct difference between a NULL ace and an ace with zero
entries in it. This is achieved by checking that num_aces is a
positive number. */
if ((num_aces) &&
((dst->aces = talloc_array(ctx, struct security_ace, num_aces))
== NULL)) {
return NULL;
}
for (i = 0; i < num_aces; i++) {
dst->aces[i] = ace_list[i]; /* Structure copy. */
dst->size += ace_list[i].size;
}
return dst;
}
/*******************************************************************
Duplicate a SEC_ACL structure.
********************************************************************/
struct security_acl *dup_sec_acl(TALLOC_CTX *ctx, struct security_acl *src)
{
if(src == NULL)
return NULL;
return make_sec_acl(ctx, src->revision, src->num_aces, src->aces);
}
/*******************************************************************
Compares two SEC_ACL structures
********************************************************************/
bool sec_acl_equal(struct security_acl *s1, struct security_acl *s2)
{
unsigned int i, j;
/* Trivial cases */
if (!s1 && !s2) return true;
if (!s1 || !s2) return false;
/* Check top level stuff */
if (s1->revision != s2->revision) {
DEBUG(10, ("sec_acl_equal(): revision differs (%d != %d)\n",
s1->revision, s2->revision));
return false;
}
if (s1->num_aces != s2->num_aces) {
DEBUG(10, ("sec_acl_equal(): num_aces differs (%d != %d)\n",
s1->revision, s2->revision));
return false;
}
/* The ACEs could be in any order so check each ACE in s1 against
each ACE in s2. */
for (i = 0; i < s1->num_aces; i++) {
bool found = false;
for (j = 0; j < s2->num_aces; j++) {
if (sec_ace_equal(&s1->aces[i], &s2->aces[j])) {
found = true;
break;
}
}
if (!found) return false;
}
return true;
}
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