/* * AppArmor security module * * This file contains AppArmor policy definitions. * * Copyright (C) 1998-2008 Novell/SUSE * Copyright 2009-2010 Canonical Ltd. * * 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, version 2 of the * License. */ #ifndef __AA_POLICY_H#define __AA_POLICY_H #include <linux/capability.h>#include <linux/cred.h>#include <linux/kref.h>#include <linux/sched.h>#include <linux/slab.h>#include <linux/socket.h> #include "apparmor.h"#include "audit.h"#include "capability.h"#include "domain.h"#include "file.h"#include "resource.h" extern const char *const profile_mode_names[];#define APPARMOR_NAMES_MAX_INDEX 3 #define COMPLAIN_MODE(_profile)	\	((aa_g_profile_mode == APPARMOR_COMPLAIN) || \	 ((_profile)->mode == APPARMOR_COMPLAIN)) #define KILL_MODE(_profile) \	((aa_g_profile_mode == APPARMOR_KILL) || \	 ((_profile)->mode == APPARMOR_KILL)) #define PROFILE_IS_HAT(_profile) ((_profile)->flags & PFLAG_HAT) /* * FIXME: currently need a clean way to replace and remove profiles as a * set.  It should be done at the namespace level. * Either, with a set of profiles loaded at the namespace level or via * a mark and remove marked interface. */enum profile_mode {	APPARMOR_ENFORCE,	/* enforce access rules */	APPARMOR_COMPLAIN,	/* allow and log access violations */	APPARMOR_KILL,		/* kill task on access violation */}; enum profile_flags {	PFLAG_HAT = 1,			/* profile is a hat */	PFLAG_UNCONFINED = 2,		/* profile is an unconfined profile */	PFLAG_NULL = 4,			/* profile is null learning profile */	PFLAG_IX_ON_NAME_ERROR = 8,	/* fallback to ix on name lookup fail */	PFLAG_IMMUTABLE = 0x10,		/* don't allow changes/replacement */	PFLAG_USER_DEFINED = 0x20,	/* user based profile - lower privs */	PFLAG_NO_LIST_REF = 0x40,	/* list doesn't keep profile ref */	PFLAG_OLD_NULL_TRANS = 0x100,	/* use // as the null transition */ 	/* These flags must correspond with PATH_flags */	PFLAG_MEDIATE_DELETED = 0x10000, /* mediate instead delegate deleted */}; struct aa_profile; /* struct aa_policy - common part of both namespaces and profiles * @name: name of the object * @hname - The hierarchical name * @count: reference count of the obj * @list: list policy object is on * @profiles: head of the profiles list contained in the object */struct aa_policy {	char *name;	char *hname;	struct kref count;	struct list_head list;	struct list_head profiles;}; /* struct aa_ns_acct - accounting of profiles in namespace * @max_size: maximum space allowed for all profiles in namespace * @max_count: maximum number of profiles that can be in this namespace * @size: current size of profiles * @count: current count of profiles (includes null profiles) */struct aa_ns_acct {	int max_size;	int max_count;	int size;	int count;}; /* struct aa_namespace - namespace for a set of profiles * @base: common policy * @parent: parent of namespace * @lock: lock for modifying the object * @acct: accounting for the namespace * @unconfined: special unconfined profile for the namespace * @sub_ns: list of namespaces under the current namespace. * * An aa_namespace defines the set profiles that are searched to determine * which profile to attach to a task.  Profiles can not be shared between * aa_namespaces and profile names within a namespace are guaranteed to be * unique.  When profiles in separate namespaces have the same name they * are NOT considered to be equivalent. * * Namespaces are hierarchical and only namespaces and profiles below the * current namespace are visible. * * Namespace names must be unique and can not contain the characters :/\0 * * FIXME TODO: add vserver support of namespaces (can it all be done in *             userspace?) */struct aa_namespace {	struct aa_policy base;	struct aa_namespace *parent;	rwlock_t lock;	struct aa_ns_acct acct;	struct aa_profile *unconfined;	struct list_head sub_ns;}; /* struct aa_policydb - match engine for a policy * dfa: dfa pattern match * start: set of start states for the different classes of data */struct aa_policydb {	/* Generic policy DFA specific rule types will be subsections of it */	struct aa_dfa *dfa;	unsigned int start[AA_CLASS_LAST + 1]; }; /* struct aa_profile - basic confinement data * @base - base components of the profile (name, refcount, lists, lock ...) * @parent: parent of profile * @ns: namespace the profile is in * @replacedby: is set to the profile that replaced this profile * @rename: optional profile name that this profile renamed * @xmatch: optional extended matching for unconfined executables names * @xmatch_len: xmatch prefix len, used to determine xmatch priority * @sid: the unique security id number of this profile * @audit: the auditing mode of the profile * @mode: the enforcement mode of the profile * @flags: flags controlling profile behavior * @path_flags: flags controlling path generation behavior * @size: the memory consumed by this profiles rules * @policy: general match rules governing policy * @file: The set of rules governing basic file access and domain transitions * @caps: capabilities for the profile * @rlimits: rlimits for the profile * * The AppArmor profile contains the basic confinement data.  Each profile * has a name, and exists in a namespace.  The @name and @exec_match are * used to determine profile attachment against unconfined tasks.  All other * attachments are determined by profile X transition rules. * * The @replacedby field is write protected by the profile lock.  Reads * are assumed to be atomic, and are done without locking. * * Profiles have a hierarchy where hats and children profiles keep * a reference to their parent. * * Profile names can not begin with a : and can not contain the \0 * character.  If a profile name begins with / it will be considered when * determining profile attachment on "unconfined" tasks. */struct aa_profile {	struct aa_policy base;	struct aa_profile *parent; 	struct aa_namespace *ns;	struct aa_profile *replacedby;	const char *rename; 	struct aa_dfa *xmatch;	int xmatch_len;	u32 sid;	enum audit_mode audit;	enum profile_mode mode;	u32 flags;	u32 path_flags;	int size; 	struct aa_policydb policy;	struct aa_file_rules file;	struct aa_caps caps;	struct aa_rlimit rlimits;}; extern struct aa_namespace *root_ns;extern enum profile_mode aa_g_profile_mode; void aa_add_profile(struct aa_policy *common, struct aa_profile *profile); bool aa_ns_visible(struct aa_namespace *curr, struct aa_namespace *view);const char *aa_ns_name(struct aa_namespace *parent, struct aa_namespace *child);int aa_alloc_root_ns(void);void aa_free_root_ns(void);void aa_free_namespace_kref(struct kref *kref); struct aa_namespace *aa_find_namespace(struct aa_namespace *root,				       const char *name); static inline struct aa_policy *aa_get_common(struct aa_policy *c){	if (c)		kref_get(&c->count); 	return c;} /** * aa_get_namespace - increment references count on @ns * @ns: namespace to increment reference count of (MAYBE NULL) * * Returns: pointer to @ns, if @ns is NULL returns NULL * Requires: @ns must be held with valid refcount when called */static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns){	if (ns)		kref_get(&(ns->base.count)); 	return ns;} /** * aa_put_namespace - decrement refcount on @ns * @ns: namespace to put reference of * * Decrement reference count of @ns and if no longer in use free it */static inline void aa_put_namespace(struct aa_namespace *ns){	if (ns)		kref_put(&ns->base.count, aa_free_namespace_kref);} struct aa_profile *aa_alloc_profile(const char *name);struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat);void aa_free_profile_kref(struct kref *kref);struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name);struct aa_profile *aa_lookup_profile(struct aa_namespace *ns, const char *name);struct aa_profile *aa_match_profile(struct aa_namespace *ns, const char *name); ssize_t aa_replace_profiles(void *udata, size_t size, bool noreplace);ssize_t aa_remove_profiles(char *name, size_t size); #define PROF_ADD 1#define PROF_REPLACE 0 #define unconfined(X) ((X)->flags & PFLAG_UNCONFINED) /** * aa_newest_version - find the newest version of @profile * @profile: the profile to check for newer versions of (NOT NULL) * * Returns: newest version of @profile, if @profile is the newest version *          return @profile. * * NOTE: the profile returned is not refcounted, The refcount on @profile * must be held until the caller decides what to do with the returned newest * version. */static inline struct aa_profile *aa_newest_version(struct aa_profile *profile){	while (profile->replacedby)		profile = profile->replacedby; 	return profile;} /** * aa_get_profile - increment refcount on profile @p * @p: profile  (MAYBE NULL) * * Returns: pointer to @p if @p is NULL will return NULL * Requires: @p must be held with valid refcount when called */static inline struct aa_profile *aa_get_profile(struct aa_profile *p){	if (p)		kref_get(&(p->base.count)); 	return p;} /** * aa_put_profile - decrement refcount on profile @p * @p: profile  (MAYBE NULL) */static inline void aa_put_profile(struct aa_profile *p){	if (p)		kref_put(&p->base.count, aa_free_profile_kref);} static inline int AUDIT_MODE(struct aa_profile *profile){	if (aa_g_audit != AUDIT_NORMAL)		return aa_g_audit; 	return profile->audit;} bool aa_may_manage_policy(int op); #endif /* __AA_POLICY_H */