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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"
#include "lib/util/string_wrappers.h"
#include "source3/lib/util_specialsids.h"
/*****************************************************************
Convert a SID to an ascii string.
*****************************************************************/
char *sid_to_fstring(fstring sidstr_out, const struct dom_sid *sid)
{
struct dom_sid_buf buf;
fstrcpy(sidstr_out, dom_sid_str_buf(sid, &buf));
return sidstr_out;
}
/*****************************************************************
Write a sid out into on-the-wire format.
*****************************************************************/
bool sid_linearize(uint8_t *outbuf, size_t len, const struct dom_sid *sid)
{
struct ndr_push ndr = {
.data = outbuf, .alloc_size = len, .fixed_buf_size = true,
};
enum ndr_err_code ndr_err;
ndr_err = ndr_push_dom_sid(&ndr, NDR_SCALARS|NDR_BUFFERS, sid);
return NDR_ERR_CODE_IS_SUCCESS(ndr_err);
}
/*****************************************************************
Returns true if SID is internal (and non-mappable).
*****************************************************************/
bool non_mappable_sid(struct dom_sid *sid)
{
struct dom_sid dom;
sid_copy(&dom, sid);
sid_split_rid(&dom, NULL);
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_talloc(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
{
int len = ndr_size_dom_sid(sid, 0);
uint8_t buf[len];
sid_linearize(buf, len, sid);
return hex_encode_talloc(mem_ctx, buf, len);
}
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)
{
NTSTATUS status;
struct dom_sid sid;
struct dom_sid *sid_array = NULL;
uint32_t num_sids = 0;
uint32_t 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 (!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 (sid_check_is_in_asserted_identity(info3->sids[i].sid)) {
continue;
}
status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
&sid_array, &num_sids);
if (!NT_STATUS_IS_OK(status)) {
struct dom_sid_buf buf;
DEBUG(3, ("could not add SID to array: %s\n",
dom_sid_str_buf(info3->sids[i].sid, &buf)));
return status;
}
}
*user_sids = sid_array;
*num_user_sids = num_sids;
return NT_STATUS_OK;
}
bool security_token_find_npa_flags(const struct security_token *token,
uint32_t *_flags)
{
const struct dom_sid *npa_flags_sid = NULL;
size_t num_npa_sids;
num_npa_sids =
security_token_count_flag_sids(token,
&global_sid_Samba_NPA_Flags,
1,
&npa_flags_sid);
if (num_npa_sids != 1) {
return false;
}
sid_peek_rid(npa_flags_sid, _flags);
return true;
}
void security_token_del_npa_flags(struct security_token *token)
{
const struct dom_sid *npa_flags_sid = NULL;
size_t num_npa_sids;
num_npa_sids =
security_token_count_flag_sids(token,
&global_sid_Samba_NPA_Flags,
1,
&npa_flags_sid);
SMB_ASSERT(num_npa_sids == 1);
del_sid_from_array(npa_flags_sid, &token->sids, &token->num_sids);
}
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