1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*-
* Copyright (c) 2001 Networks Associates Technologies, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by NAI Labs, the
* Security Research Division of Network Associates, Inc. under
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
* CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $FreeBSD$
*/
#ifndef KERNEL_INTERFACE_H
#define KERNEL_INTERFACE_H
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
#include "lomac.h"
/*
* We do not yet implement any categories. We use lattr_t's flags
* field to implement the "LOMAC_ATTR_LOWWRITE" exception. When
* this bit is set on a file, lowest-level processes can write to
* the file, regardless of the file's level.
*
* There is also the LOMAC_ATTR_LOWNOOPEN flag, which prevents the
* opening of a given object to subjects with a lower level than its
* own.
*
* LOMAC_ATTR_NONETDEMOTE is set on subjects to prevent demotion on
* network reads; LOMAC_ATTR_NODEMOTE is set on subjects to prevent
* all demotion. Both of these will effectively set a high-level
* subject as very trusted (and must be used sparingly).
*/
#define LOMAC_ATTR_LOWWRITE 0x00010000
#define LOMAC_ATTR_LOWNOOPEN 0x00020000
#define LOMAC_ATTR_NONETDEMOTE 0x00040000
#define LOMAC_ATTR_NODEMOTE 0x00080000
typedef struct proc lomac_subject_t;
typedef struct lomac_object {
enum lomac_object_type {
LO_TYPE_LVNODE, /* LOMAC vnode */
LO_TYPE_UVNODE, /* underlying vnode */
LO_TYPE_VM_OBJECT, /* VM object, not OBJT_VNODE */
LO_TYPE_PIPE, /* pipe */
LO_TYPE_SOCKETPAIR /* local-domain socket in socketpair */
} lo_type;
union {
struct vnode *vnode;
vm_object_t vm_object;
struct pipe *pipe;
struct socket *socket;
} lo_object;
} lomac_object_t;
typedef struct sbuf lomac_log_t;
void init_subject_lattr(lomac_subject_t *, lattr_t *);
void set_subject_lattr(lomac_subject_t *, lattr_t);
void get_subject_lattr(lomac_subject_t *, lattr_t *);
void set_object_lattr(lomac_object_t *, lattr_t);
void get_object_lattr(const lomac_object_t *, lattr_t *);
int subject_do_not_demote(lomac_subject_t *);
#if 0
void subject_propogate_lattr(lomac_subject_t *);
#endif
void kernel_vm_drop_perms(struct thread *, lattr_t *);
#endif /* KERNEL_INTERFACE_H */
|
