forked from Minki/linux
ca916e8e2d
The cross check permission helper macros will help simplify code that does cross task permission checks like ptrace. Signed-off-by: John Johansen <john.johansen@canonical.com>
156 lines
4.8 KiB
C
156 lines
4.8 KiB
C
/*
|
|
* AppArmor security module
|
|
*
|
|
* This file contains AppArmor basic permission sets definitions.
|
|
*
|
|
* Copyright 2017 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_PERM_H
|
|
#define __AA_PERM_H
|
|
|
|
#include <linux/fs.h>
|
|
#include "label.h"
|
|
|
|
#define AA_MAY_EXEC MAY_EXEC
|
|
#define AA_MAY_WRITE MAY_WRITE
|
|
#define AA_MAY_READ MAY_READ
|
|
#define AA_MAY_APPEND MAY_APPEND
|
|
|
|
#define AA_MAY_CREATE 0x0010
|
|
#define AA_MAY_DELETE 0x0020
|
|
#define AA_MAY_OPEN 0x0040
|
|
#define AA_MAY_RENAME 0x0080 /* pair */
|
|
|
|
#define AA_MAY_SETATTR 0x0100 /* meta write */
|
|
#define AA_MAY_GETATTR 0x0200 /* meta read */
|
|
#define AA_MAY_SETCRED 0x0400 /* security cred/attr */
|
|
#define AA_MAY_GETCRED 0x0800
|
|
|
|
#define AA_MAY_CHMOD 0x1000 /* pair */
|
|
#define AA_MAY_CHOWN 0x2000 /* pair */
|
|
#define AA_MAY_CHGRP 0x4000 /* pair */
|
|
#define AA_MAY_LOCK 0x8000 /* LINK_SUBSET overlaid */
|
|
|
|
#define AA_EXEC_MMAP 0x00010000
|
|
#define AA_MAY_MPROT 0x00020000 /* extend conditions */
|
|
#define AA_MAY_LINK 0x00040000 /* pair */
|
|
#define AA_MAY_SNAPSHOT 0x00080000 /* pair */
|
|
|
|
#define AA_MAY_DELEGATE
|
|
#define AA_CONT_MATCH 0x08000000
|
|
|
|
#define AA_MAY_STACK 0x10000000
|
|
#define AA_MAY_ONEXEC 0x20000000 /* either stack or change_profile */
|
|
#define AA_MAY_CHANGE_PROFILE 0x40000000
|
|
#define AA_MAY_CHANGEHAT 0x80000000
|
|
|
|
#define AA_LINK_SUBSET AA_MAY_LOCK /* overlaid */
|
|
|
|
|
|
#define PERMS_CHRS_MASK (MAY_READ | MAY_WRITE | AA_MAY_CREATE | \
|
|
AA_MAY_DELETE | AA_MAY_LINK | AA_MAY_LOCK | \
|
|
AA_MAY_EXEC | AA_EXEC_MMAP | AA_MAY_APPEND)
|
|
|
|
#define PERMS_NAMES_MASK (PERMS_CHRS_MASK | AA_MAY_OPEN | AA_MAY_RENAME | \
|
|
AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_SETCRED | \
|
|
AA_MAY_GETCRED | AA_MAY_CHMOD | AA_MAY_CHOWN | \
|
|
AA_MAY_CHGRP | AA_MAY_MPROT | AA_MAY_SNAPSHOT | \
|
|
AA_MAY_STACK | AA_MAY_ONEXEC | \
|
|
AA_MAY_CHANGE_PROFILE | AA_MAY_CHANGEHAT)
|
|
|
|
extern const char aa_file_perm_chrs[];
|
|
extern const char *aa_file_perm_names[];
|
|
|
|
struct aa_perms {
|
|
u32 allow;
|
|
u32 audit; /* set only when allow is set */
|
|
|
|
u32 deny; /* explicit deny, or conflict if allow also set */
|
|
u32 quiet; /* set only when ~allow | deny */
|
|
u32 kill; /* set only when ~allow | deny */
|
|
u32 stop; /* set only when ~allow | deny */
|
|
|
|
u32 complain; /* accumulates only used when ~allow & ~deny */
|
|
u32 cond; /* set only when ~allow and ~deny */
|
|
|
|
u32 hide; /* set only when ~allow | deny */
|
|
u32 prompt; /* accumulates only used when ~allow & ~deny */
|
|
|
|
/* Reserved:
|
|
* u32 subtree; / * set only when allow is set * /
|
|
*/
|
|
u16 xindex;
|
|
};
|
|
|
|
#define ALL_PERMS_MASK 0xffffffff
|
|
extern struct aa_perms nullperms;
|
|
extern struct aa_perms allperms;
|
|
|
|
|
|
#define xcheck(FN1, FN2) \
|
|
({ \
|
|
int e, error = FN1; \
|
|
e = FN2; \
|
|
if (e) \
|
|
error = e; \
|
|
error; \
|
|
})
|
|
|
|
|
|
/*
|
|
* TODO: update for labels pointing to labels instead of profiles
|
|
* TODO: optimize the walk, currently does subwalk of L2 for each P in L1
|
|
* gah this doesn't allow for label compound check!!!!
|
|
*/
|
|
#define xcheck_ns_profile_profile(P1, P2, FN, args...) \
|
|
({ \
|
|
int ____e = 0; \
|
|
if (P1->ns == P2->ns) \
|
|
____e = FN((P1), (P2), args); \
|
|
(____e); \
|
|
})
|
|
|
|
#define xcheck_ns_profile_label(P, L, FN, args...) \
|
|
({ \
|
|
struct aa_profile *__p2; \
|
|
fn_for_each((L), __p2, \
|
|
xcheck_ns_profile_profile((P), __p2, (FN), args)); \
|
|
})
|
|
|
|
#define xcheck_ns_labels(L1, L2, FN, args...) \
|
|
({ \
|
|
struct aa_profile *__p1; \
|
|
fn_for_each((L1), __p1, FN(__p1, (L2), args)); \
|
|
})
|
|
|
|
/* Do the cross check but applying FN at the profiles level */
|
|
#define xcheck_labels_profiles(L1, L2, FN, args...) \
|
|
xcheck_ns_labels((L1), (L2), xcheck_ns_profile_label, (FN), args)
|
|
|
|
|
|
void aa_perm_mask_to_str(char *str, const char *chrs, u32 mask);
|
|
void aa_audit_perm_names(struct audit_buffer *ab, const char **names, u32 mask);
|
|
void aa_audit_perm_mask(struct audit_buffer *ab, u32 mask, const char *chrs,
|
|
u32 chrsmask, const char **names, u32 namesmask);
|
|
void aa_apply_modes_to_perms(struct aa_profile *profile,
|
|
struct aa_perms *perms);
|
|
void aa_compute_perms(struct aa_dfa *dfa, unsigned int state,
|
|
struct aa_perms *perms);
|
|
void aa_perms_accum(struct aa_perms *accum, struct aa_perms *addend);
|
|
void aa_perms_accum_raw(struct aa_perms *accum, struct aa_perms *addend);
|
|
void aa_profile_match_label(struct aa_profile *profile, struct aa_label *label,
|
|
int type, u32 request, struct aa_perms *perms);
|
|
int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target,
|
|
u32 request, int type, u32 *deny,
|
|
struct common_audit_data *sa);
|
|
int aa_check_perms(struct aa_profile *profile, struct aa_perms *perms,
|
|
u32 request, struct common_audit_data *sa,
|
|
void (*cb)(struct audit_buffer *, void *));
|
|
#endif /* __AA_PERM_H */
|