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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
Copyright (C) Jeremy Allison 1999
Copyright (C) Stefan (metze) Metzmacher 2002
Copyright (C) Simo Sorce 2002
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
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"
#include "../librpc/gen_ndr/netlogon.h"
#include "../libcli/security/security.h"
/*****************************************************************
Convert a SID to an ascii string.
*****************************************************************/
char *sid_to_fstring(fstring sidstr_out, const struct dom_sid *sid)
{
char *str = sid_string_talloc(talloc_tos(), sid);
fstrcpy(sidstr_out, str);
TALLOC_FREE(str);
return sidstr_out;
}
/*****************************************************************
Essentially a renamed dom_sid_string from
../libcli/security/dom_sid.c with a panic if it didn't work.
*****************************************************************/
char *sid_string_talloc(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
{
char *result = dom_sid_string(mem_ctx, sid);
SMB_ASSERT(result != NULL);
return result;
}
/*****************************************************************
Useful function for debug lines.
*****************************************************************/
char *sid_string_dbg(const struct dom_sid *sid)
{
return sid_string_talloc(talloc_tos(), sid);
}
/*****************************************************************
Use with care!
*****************************************************************/
char *sid_string_tos(const struct dom_sid *sid)
{
return sid_string_talloc(talloc_tos(), sid);
}
/*****************************************************************
Write a sid out into on-the-wire format.
*****************************************************************/
bool sid_linearize(char *outbuf, size_t len, const struct dom_sid *sid)
{
size_t i;
if (len < ndr_size_dom_sid(sid, 0))
return False;
SCVAL(outbuf,0,sid->sid_rev_num);
SCVAL(outbuf,1,sid->num_auths);
memcpy(&outbuf[2], sid->id_auth, 6);
for(i = 0; i < sid->num_auths; i++)
SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
return True;
}
/*****************************************************************
Returns true if SID is internal (and non-mappable).
*****************************************************************/
bool non_mappable_sid(struct dom_sid *sid)
{
struct dom_sid dom;
uint32 rid;
sid_copy(&dom, sid);
sid_split_rid(&dom, &rid);
if (dom_sid_equal(&dom, &global_sid_Builtin))
return True;
if (dom_sid_equal(&dom, &global_sid_NT_Authority))
return True;
return False;
}
/*****************************************************************
Return the binary string representation of a struct dom_sid.
Caller must free.
*****************************************************************/
char *sid_binstring_hex(const struct dom_sid *sid)
{
char *buf, *s;
int len = ndr_size_dom_sid(sid, 0);
buf = (char *)SMB_MALLOC(len);
if (!buf)
return NULL;
sid_linearize(buf, len, sid);
s = binary_string(buf, len);
free(buf);
return s;
}
NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
const struct netr_SamInfo3 *info3,
struct dom_sid **user_sids,
uint32_t *num_user_sids,
bool include_user_group_rid,
bool skip_ressource_groups)
{
NTSTATUS status;
struct dom_sid sid;
struct dom_sid *sid_array = NULL;
uint32_t num_sids = 0;
int i;
if (include_user_group_rid) {
if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) {
DEBUG(3, ("could not compose user SID from rid 0x%x\n",
info3->base.rid));
return NT_STATUS_INVALID_PARAMETER;
}
status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("could not append user SID from rid 0x%x\n",
info3->base.rid));
return status;
}
}
if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) {
DEBUG(3, ("could not compose group SID from rid 0x%x\n",
info3->base.primary_gid));
return NT_STATUS_INVALID_PARAMETER;
}
status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("could not append group SID from rid 0x%x\n",
info3->base.rid));
return status;
}
for (i = 0; i < info3->base.groups.count; i++) {
/* Don't add the primary group sid twice. */
if (info3->base.primary_gid == info3->base.groups.rids[i].rid) {
continue;
}
if (!sid_compose(&sid, info3->base.domain_sid,
info3->base.groups.rids[i].rid)) {
DEBUG(3, ("could not compose SID from additional group "
"rid 0x%x\n", info3->base.groups.rids[i].rid));
return NT_STATUS_INVALID_PARAMETER;
}
status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("could not append SID from additional group "
"rid 0x%x\n", info3->base.groups.rids[i].rid));
return status;
}
}
/* Copy 'other' sids. We need to do sid filtering here to
prevent possible elevation of privileges. See:
http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
*/
for (i = 0; i < info3->sidcount; i++) {
if (skip_ressource_groups &&
(info3->sids[i].attributes & SE_GROUP_RESOURCE)) {
continue;
}
status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
&sid_array, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("could not add SID to array: %s\n",
sid_string_dbg(info3->sids[i].sid)));
return status;
}
}
*user_sids = sid_array;
*num_user_sids = num_sids;
return NT_STATUS_OK;
}
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