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/*
Unix SMB/CIFS implementation.
security descriptor utility functions
Copyright (C) Andrew Tridgell 2004
Copyright (C) Andrew Bartlett 2010
Copyright (C) Stefan Metzmacher 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 "replace.h"
#include <talloc.h>
#include "lib/util/talloc_stack.h"
#include "lib/util/debug.h"
#include "lib/util/fault.h"
#include "libcli/security/security_token.h"
#include "libcli/security/dom_sid.h"
#include "libcli/security/privileges.h"
#include "librpc/gen_ndr/ndr_security.h"
#include "lib/util/talloc_stack.h"
/*
return a blank security token
*/
struct security_token *security_token_initialise(TALLOC_CTX *mem_ctx,
enum claims_evaluation_control evaluate_claims)
{
struct security_token *st = talloc_zero(
mem_ctx, struct security_token);
st->evaluate_claims = evaluate_claims;
return st;
}
/****************************************************************************
Duplicate a SID token.
****************************************************************************/
struct security_token *security_token_duplicate(TALLOC_CTX *mem_ctx, const struct security_token *src)
{
TALLOC_CTX *frame = NULL;
struct security_token *dst = NULL;
DATA_BLOB blob;
enum ndr_err_code ndr_err;
if (src == NULL) {
return NULL;
}
frame = talloc_stackframe();
ndr_err = ndr_push_struct_blob(
&blob,
frame,
src,
(ndr_push_flags_fn_t)ndr_push_security_token);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DBG_ERR("Failed to duplicate security_token ndr_push_security_token failed: %s\n",
ndr_errstr(ndr_err));
TALLOC_FREE(frame);
return NULL;
}
dst = talloc_zero(mem_ctx, struct security_token);
if (dst == NULL) {
DBG_ERR("talloc failed\n");
TALLOC_FREE(frame);
return NULL;
}
ndr_err = ndr_pull_struct_blob(
&blob,
dst,
dst,
(ndr_pull_flags_fn_t)ndr_pull_security_token);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DBG_ERR("Failed to duplicate security_token ndr_pull_security_token "
"failed: %s\n",
ndr_errstr(ndr_err));
TALLOC_FREE(dst);
TALLOC_FREE(frame);
return NULL;
}
TALLOC_FREE(frame);
return dst;
}
/****************************************************************************
prints a struct security_token to debug output.
****************************************************************************/
void security_token_debug(int dbg_class, int dbg_lev, const struct security_token *token)
{
TALLOC_CTX *frame = talloc_stackframe();
char *sids = NULL;
char *privs = NULL;
uint32_t i;
if (!token) {
DEBUGC(dbg_class, dbg_lev, ("Security token: (NULL)\n"));
TALLOC_FREE(frame);
return;
}
sids = talloc_asprintf(frame,
"Security token SIDs (%" PRIu32 "):\n",
token->num_sids);
for (i = 0; i < token->num_sids; i++) {
struct dom_sid_buf sidbuf;
talloc_asprintf_addbuf(
&sids,
" SID[%3" PRIu32 "]: %s\n",
i,
dom_sid_str_buf(&token->sids[i], &sidbuf));
}
privs = security_token_debug_privileges(frame, token);
DEBUGC(dbg_class,
dbg_lev,
("%s%s", sids ? sids : "(NULL)", privs ? privs : "(NULL)"));
TALLOC_FREE(frame);
}
/* These really should be cheaper... */
bool security_token_is_sid(const struct security_token *token, const struct dom_sid *sid)
{
bool ret;
if (token->sids == NULL) {
return false;
}
ret = dom_sid_equal(&token->sids[PRIMARY_USER_SID_INDEX], sid);
return ret;
}
bool security_token_is_system(const struct security_token *token)
{
return security_token_is_sid(token, &global_sid_System);
}
bool security_token_is_anonymous(const struct security_token *token)
{
return security_token_is_sid(token, &global_sid_Anonymous);
}
bool security_token_has_sid(const struct security_token *token, const struct dom_sid *sid)
{
uint32_t i;
for (i = 0; i < token->num_sids; i++) {
if (dom_sid_equal(&token->sids[i], sid)) {
return true;
}
}
return false;
}
size_t security_token_count_flag_sids(const struct security_token *token,
const struct dom_sid *prefix_sid,
size_t num_flags,
const struct dom_sid **_flag_sid)
{
const size_t num_auths_expected = prefix_sid->num_auths + num_flags;
const struct dom_sid *found = NULL;
size_t num = 0;
uint32_t i;
SMB_ASSERT(num_auths_expected <= ARRAY_SIZE(prefix_sid->sub_auths));
for (i = 0; i < token->num_sids; i++) {
const struct dom_sid *sid = &token->sids[i];
int cmp;
if (sid->num_auths != num_auths_expected) {
continue;
}
cmp = dom_sid_compare_domain(sid, prefix_sid);
if (cmp != 0) {
continue;
}
num += 1;
found = sid;
}
if ((num == 1) && (_flag_sid != NULL)) {
*_flag_sid = found;
}
return num;
}
bool security_token_has_builtin_guests(const struct security_token *token)
{
return security_token_has_sid(token, &global_sid_Builtin_Guests);
}
bool security_token_has_builtin_administrators(const struct security_token *token)
{
return security_token_has_sid(token, &global_sid_Builtin_Administrators);
}
bool security_token_has_nt_authenticated_users(const struct security_token *token)
{
return security_token_has_sid(token, &global_sid_Authenticated_Users);
}
bool security_token_has_enterprise_dcs(const struct security_token *token)
{
return security_token_has_sid(token, &global_sid_Enterprise_DCs);
}
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