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/* SPDX-License-Identifier: GPL-2.0 */
/*
* SafeSetID Linux Security Module
*
* Author: Micah Morton <mortonm@chromium.org>
*
* Copyright (C) 2018 The Chromium OS Authors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
*/
#ifndef _SAFESETID_H
#define _SAFESETID_H
#include <linux/types.h>
#include <linux/uidgid.h>
#include <linux/hashtable.h>
/* Flag indicating whether initialization completed */
extern int safesetid_initialized;
enum sid_policy_type {
SIDPOL_DEFAULT, /* source ID is unaffected by policy */
SIDPOL_CONSTRAINED, /* source ID is affected by policy */
SIDPOL_ALLOWED /* target ID explicitly allowed */
};
/*
* Hash table entry to store safesetid policy signifying that 'src_uid'
* can setuid to 'dst_uid'.
*/
struct setuid_rule {
struct hlist_node next;
kuid_t src_uid;
kuid_t dst_uid;
};
#define SETID_HASH_BITS 8 /* 256 buckets in hash table */
struct setuid_ruleset {
DECLARE_HASHTABLE(rules, SETID_HASH_BITS);
char *policy_str;
struct rcu_head rcu;
};
enum sid_policy_type _setuid_policy_lookup(struct setuid_ruleset *policy,
kuid_t src, kuid_t dst);
extern struct setuid_ruleset __rcu *safesetid_setuid_rules;
#endif /* _SAFESETID_H */
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