mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
acf9d61421
functions so we can funnel through some well known functions. Should help greatly with
malloc checking.
HEAD patch to follow.
Jeremy.
(This used to be commit 620f2e608f
)
286 lines
8.6 KiB
C
286 lines
8.6 KiB
C
/*
|
|
* Unix SMB/Netbios implementation.
|
|
* SEC_ACE handling functions
|
|
* 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
/*******************************************************************
|
|
Check if ACE has OBJECT type.
|
|
********************************************************************/
|
|
|
|
BOOL sec_ace_object(uint8 type)
|
|
{
|
|
if (type == SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT ||
|
|
type == SEC_ACE_TYPE_ACCESS_DENIED_OBJECT ||
|
|
type == SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT ||
|
|
type == SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT) {
|
|
return True;
|
|
}
|
|
return False;
|
|
}
|
|
|
|
/*******************************************************************
|
|
copy a SEC_ACE structure.
|
|
********************************************************************/
|
|
void sec_ace_copy(SEC_ACE *ace_dest, SEC_ACE *ace_src)
|
|
{
|
|
ace_dest->type = ace_src->type;
|
|
ace_dest->flags = ace_src->flags;
|
|
ace_dest->size = ace_src->size;
|
|
ace_dest->info.mask = ace_src->info.mask;
|
|
ace_dest->obj_flags = ace_src->obj_flags;
|
|
memcpy(&ace_dest->obj_guid, &ace_src->obj_guid, sizeof(struct uuid));
|
|
memcpy(&ace_dest->inh_guid, &ace_src->inh_guid, sizeof(struct uuid));
|
|
sid_copy(&ace_dest->trustee, &ace_src->trustee);
|
|
}
|
|
|
|
/*******************************************************************
|
|
Sets up a SEC_ACE structure.
|
|
********************************************************************/
|
|
|
|
void init_sec_ace(SEC_ACE *t, DOM_SID *sid, uint8 type, SEC_ACCESS mask, uint8 flag)
|
|
{
|
|
t->type = type;
|
|
t->flags = flag;
|
|
t->size = sid_size(sid) + 8;
|
|
t->info = mask;
|
|
|
|
ZERO_STRUCTP(&t->trustee);
|
|
sid_copy(&t->trustee, sid);
|
|
}
|
|
|
|
/*******************************************************************
|
|
adds new SID with its permissions to ACE list
|
|
********************************************************************/
|
|
|
|
NTSTATUS sec_ace_add_sid(TALLOC_CTX *ctx, SEC_ACE **new, SEC_ACE *old, unsigned *num, DOM_SID *sid, uint32 mask)
|
|
{
|
|
unsigned int i = 0;
|
|
|
|
if (!ctx || !new || !old || !sid || !num) return NT_STATUS_INVALID_PARAMETER;
|
|
|
|
*num += 1;
|
|
|
|
if((new[0] = TALLOC_ZERO_ARRAY(ctx, SEC_ACE, *num )) == 0)
|
|
return NT_STATUS_NO_MEMORY;
|
|
|
|
for (i = 0; i < *num - 1; i ++)
|
|
sec_ace_copy(&(*new)[i], &old[i]);
|
|
|
|
(*new)[i].type = 0;
|
|
(*new)[i].flags = 0;
|
|
(*new)[i].size = SEC_ACE_HEADER_SIZE + sid_size(sid);
|
|
(*new)[i].info.mask = mask;
|
|
sid_copy(&(*new)[i].trustee, sid);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*******************************************************************
|
|
modify SID's permissions at ACL
|
|
********************************************************************/
|
|
|
|
NTSTATUS sec_ace_mod_sid(SEC_ACE *ace, size_t num, DOM_SID *sid, uint32 mask)
|
|
{
|
|
unsigned int i = 0;
|
|
|
|
if (!ace || !sid) return NT_STATUS_INVALID_PARAMETER;
|
|
|
|
for (i = 0; i < num; i ++) {
|
|
if (sid_compare(&ace[i].trustee, sid) == 0) {
|
|
ace[i].info.mask = mask;
|
|
return NT_STATUS_OK;
|
|
}
|
|
}
|
|
return NT_STATUS_NOT_FOUND;
|
|
}
|
|
|
|
/*******************************************************************
|
|
delete SID from ACL
|
|
********************************************************************/
|
|
|
|
NTSTATUS sec_ace_del_sid(TALLOC_CTX *ctx, SEC_ACE **new, SEC_ACE *old, uint32 *num, DOM_SID *sid)
|
|
{
|
|
unsigned int i = 0;
|
|
unsigned int n_del = 0;
|
|
|
|
if (!ctx || !new || !old || !sid || !num) return NT_STATUS_INVALID_PARAMETER;
|
|
|
|
if((new[0] = TALLOC_ZERO_ARRAY(ctx, SEC_ACE, *num )) == 0)
|
|
return NT_STATUS_NO_MEMORY;
|
|
|
|
for (i = 0; i < *num; i ++) {
|
|
if (sid_compare(&old[i].trustee, sid) != 0)
|
|
sec_ace_copy(&(*new)[i], &old[i]);
|
|
else
|
|
n_del ++;
|
|
}
|
|
if (n_del == 0)
|
|
return NT_STATUS_NOT_FOUND;
|
|
else {
|
|
*num -= n_del;
|
|
return NT_STATUS_OK;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************
|
|
Compares two SEC_ACE structures
|
|
********************************************************************/
|
|
|
|
BOOL sec_ace_equal(SEC_ACE *s1, SEC_ACE *s2)
|
|
{
|
|
/* Trivial case */
|
|
|
|
if (!s1 && !s2) return True;
|
|
|
|
/* Check top level stuff */
|
|
|
|
if (s1->type != s2->type || s1->flags != s2->flags ||
|
|
s1->info.mask != s2->info.mask) {
|
|
return False;
|
|
}
|
|
|
|
/* Check SID */
|
|
|
|
if (!sid_equal(&s1->trustee, &s2->trustee)) {
|
|
return False;
|
|
}
|
|
|
|
return True;
|
|
}
|
|
|
|
int nt_ace_inherit_comp( SEC_ACE *a1, SEC_ACE *a2)
|
|
{
|
|
int a1_inh = a1->flags & SEC_ACE_FLAG_INHERITED_ACE;
|
|
int a2_inh = a2->flags & SEC_ACE_FLAG_INHERITED_ACE;
|
|
|
|
if (a1_inh == a2_inh)
|
|
return 0;
|
|
|
|
if (!a1_inh && a2_inh)
|
|
return -1;
|
|
return 1;
|
|
}
|
|
|
|
/*******************************************************************
|
|
Comparison function to apply the order explained below in a group.
|
|
*******************************************************************/
|
|
|
|
int nt_ace_canon_comp( SEC_ACE *a1, SEC_ACE *a2)
|
|
{
|
|
if ((a1->type == SEC_ACE_TYPE_ACCESS_DENIED) &&
|
|
(a2->type != SEC_ACE_TYPE_ACCESS_DENIED))
|
|
return -1;
|
|
|
|
if ((a2->type == SEC_ACE_TYPE_ACCESS_DENIED) &&
|
|
(a1->type != SEC_ACE_TYPE_ACCESS_DENIED))
|
|
return 1;
|
|
|
|
/* Both access denied or access allowed. */
|
|
|
|
/* 1. ACEs that apply to the object itself */
|
|
|
|
if (!(a1->flags & SEC_ACE_FLAG_INHERIT_ONLY) &&
|
|
(a2->flags & SEC_ACE_FLAG_INHERIT_ONLY))
|
|
return -1;
|
|
else if (!(a2->flags & SEC_ACE_FLAG_INHERIT_ONLY) &&
|
|
(a1->flags & SEC_ACE_FLAG_INHERIT_ONLY))
|
|
return 1;
|
|
|
|
/* 2. ACEs that apply to a subobject of the object, such as
|
|
* a property set or property. */
|
|
|
|
if (a1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT) &&
|
|
!(a2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT)))
|
|
return -1;
|
|
else if (a2->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT) &&
|
|
!(a1->flags & (SEC_ACE_FLAG_CONTAINER_INHERIT|SEC_ACE_FLAG_OBJECT_INHERIT)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*******************************************************************
|
|
Functions to convert a SEC_DESC ACE DACL list into canonical order.
|
|
JRA.
|
|
|
|
--- from http://msdn.microsoft.com/library/default.asp?url=/library/en-us/security/security/order_of_aces_in_a_dacl.asp
|
|
|
|
The following describes the preferred order:
|
|
|
|
To ensure that noninherited ACEs have precedence over inherited ACEs,
|
|
place all noninherited ACEs in a group before any inherited ACEs.
|
|
This ordering ensures, for example, that a noninherited access-denied ACE
|
|
is enforced regardless of any inherited ACE that allows access.
|
|
|
|
Within the groups of noninherited ACEs and inherited ACEs, order ACEs according to ACE type, as the following shows:
|
|
1. Access-denied ACEs that apply to the object itself
|
|
2. Access-denied ACEs that apply to a subobject of the object, such as a property set or property
|
|
3. Access-allowed ACEs that apply to the object itself
|
|
4. Access-allowed ACEs that apply to a subobject of the object"
|
|
|
|
********************************************************************/
|
|
|
|
void dacl_sort_into_canonical_order(SEC_ACE *srclist, unsigned int num_aces)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!srclist || num_aces == 0)
|
|
return;
|
|
|
|
/* Sort so that non-inherited ACE's come first. */
|
|
qsort( srclist, num_aces, sizeof(srclist[0]), QSORT_CAST nt_ace_inherit_comp);
|
|
|
|
/* Find the boundary between non-inherited ACEs. */
|
|
for (i = 0; i < num_aces; i++ ) {
|
|
SEC_ACE *curr_ace = &srclist[i];
|
|
|
|
if (curr_ace->flags & SEC_ACE_FLAG_INHERITED_ACE)
|
|
break;
|
|
}
|
|
|
|
/* i now points at entry number of the first inherited ACE. */
|
|
|
|
/* Sort the non-inherited ACEs. */
|
|
if (i)
|
|
qsort( srclist, i, sizeof(srclist[0]), QSORT_CAST nt_ace_canon_comp);
|
|
|
|
/* Now sort the inherited ACEs. */
|
|
if (num_aces - i)
|
|
qsort( &srclist[i], num_aces - i, sizeof(srclist[0]), QSORT_CAST nt_ace_canon_comp);
|
|
}
|
|
|
|
/*******************************************************************
|
|
Check if this ACE has a SID in common with the token.
|
|
********************************************************************/
|
|
|
|
BOOL token_sid_in_ace(const NT_USER_TOKEN *token, const SEC_ACE *ace)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < token->num_sids; i++) {
|
|
if (sid_equal(&ace->trustee, &token->user_sids[i]))
|
|
return True;
|
|
}
|
|
|
|
return False;
|
|
}
|