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