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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Stefan (metze) Metzmacher 2002-2004
Copyright (C) Andrew Tridgell 1992-2004
Copyright (C) Jeremy Allison 1999
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"
#include "librpc/gen_ndr/ndr_security.h"
/*****************************************************************
Compare the auth portion of two sids.
*****************************************************************/
static int dom_sid_compare_auth(const struct dom_sid *sid1, const struct dom_sid *sid2)
{
int i;
if (sid1 == sid2)
return 0;
if (!sid1)
return -1;
if (!sid2)
return 1;
if (sid1->sid_rev_num != sid2->sid_rev_num)
return sid1->sid_rev_num - sid2->sid_rev_num;
for (i = 0; i < 6; i++)
if (sid1->id_auth[i] != sid2->id_auth[i])
return sid1->id_auth[i] - sid2->id_auth[i];
return 0;
}
/*****************************************************************
Compare two sids.
*****************************************************************/
static int dom_sid_compare(const struct dom_sid *sid1, const struct dom_sid *sid2)
{
int i;
if (sid1 == sid2)
return 0;
if (!sid1)
return -1;
if (!sid2)
return 1;
/* Compare most likely different rids, first: i.e start at end */
if (sid1->num_auths != sid2->num_auths)
return sid1->num_auths - sid2->num_auths;
for (i = sid1->num_auths-1; i >= 0; --i)
if (sid1->sub_auths[i] != sid2->sub_auths[i])
return sid1->sub_auths[i] - sid2->sub_auths[i];
return dom_sid_compare_auth(sid1, sid2);
}
/*****************************************************************
Compare two sids.
*****************************************************************/
BOOL dom_sid_equal(const struct dom_sid *sid1, const struct dom_sid *sid2)
{
return dom_sid_compare(sid1, sid2) == 0;
}
/*
convert a string to a dom_sid, returning a talloc'd dom_sid
*/
struct dom_sid *dom_sid_parse_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
{
struct dom_sid *ret;
uint_t rev, ia, num_sub_auths, i;
char *p;
if (strncasecmp(sidstr, "S-", 2)) {
return NULL;
}
sidstr += 2;
rev = strtol(sidstr, &p, 10);
if (*p != '-') {
return NULL;
}
sidstr = p+1;
ia = strtol(sidstr, &p, 10);
if (p == sidstr) {
return NULL;
}
sidstr = p;
num_sub_auths = 0;
for (i=0;sidstr[i];i++) {
if (sidstr[i] == '-') num_sub_auths++;
}
ret = talloc(mem_ctx, struct dom_sid);
if (!ret) {
return NULL;
}
ret->sub_auths = talloc_array(ret, uint32_t, num_sub_auths);
if (!ret->sub_auths) {
return NULL;
}
ret->sid_rev_num = rev;
ret->id_auth[0] = 0;
ret->id_auth[1] = 0;
ret->id_auth[2] = ia >> 24;
ret->id_auth[3] = ia >> 16;
ret->id_auth[4] = ia >> 8;
ret->id_auth[5] = ia;
ret->num_auths = num_sub_auths;
for (i=0;i<num_sub_auths;i++) {
if (sidstr[0] != '-') {
return NULL;
}
sidstr++;
ret->sub_auths[i] = strtoul(sidstr, &p, 10);
if (p == sidstr) {
return NULL;
}
sidstr = p;
}
return ret;
}
/*
copy a dom_sid structure
*/
struct dom_sid *dom_sid_dup(TALLOC_CTX *mem_ctx, const struct dom_sid *dom_sid)
{
struct dom_sid *ret;
int i;
ret = talloc(mem_ctx, struct dom_sid);
if (!ret) {
return NULL;
}
ret->sub_auths = talloc_array(ret, uint32_t, dom_sid->num_auths);
if (!ret->sub_auths) {
return NULL;
}
ret->sid_rev_num = dom_sid->sid_rev_num;
ret->id_auth[0] = dom_sid->id_auth[0];
ret->id_auth[1] = dom_sid->id_auth[1];
ret->id_auth[2] = dom_sid->id_auth[2];
ret->id_auth[3] = dom_sid->id_auth[3];
ret->id_auth[4] = dom_sid->id_auth[4];
ret->id_auth[5] = dom_sid->id_auth[5];
ret->num_auths = dom_sid->num_auths;
for (i=0;i<dom_sid->num_auths;i++) {
ret->sub_auths[i] = dom_sid->sub_auths[i];
}
return ret;
}
/*
add a rid to a domain dom_sid to make a full dom_sid. This function
returns a new sid in the suppplied memory context
*/
struct dom_sid *dom_sid_add_rid(TALLOC_CTX *mem_ctx,
const struct dom_sid *domain_sid,
uint32_t rid)
{
struct dom_sid *sid;
sid = talloc(mem_ctx, struct dom_sid);
if (!sid) return NULL;
*sid = *domain_sid;
sid->sub_auths = talloc_array(sid, uint32_t, sid->num_auths+1);
if (!sid->sub_auths) {
return NULL;
}
memcpy(sid->sub_auths, domain_sid->sub_auths, sid->num_auths*sizeof(uint32_t));
sid->sub_auths[sid->num_auths] = rid;
sid->num_auths++;
return sid;
}
/*
return True if the 2nd sid is in the domain given by the first sid
*/
BOOL dom_sid_in_domain(const struct dom_sid *domain_sid,
const struct dom_sid *sid)
{
int i;
if (!domain_sid || !sid) {
return False;
}
if (domain_sid->num_auths > sid->num_auths) {
return False;
}
for (i = domain_sid->num_auths-1; i >= 0; --i) {
if (domain_sid->sub_auths[i] != sid->sub_auths[i]) {
return False;
}
}
return dom_sid_compare_auth(domain_sid, sid) == 0;
}
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