102 lines
3.7 KiB
C
102 lines
3.7 KiB
C
/*-
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* Copyright (c) 2001 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by NAI Labs, the
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* Security Research Division of Network Associates, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
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* CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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* $FreeBSD$
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*/
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#ifndef KERNEL_INTERFACE_H
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#define KERNEL_INTERFACE_H
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/sbuf.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include "lomac.h"
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/*
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* We do not yet implement any categories. We use lattr_t's flags
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* field to implement the "LOMAC_ATTR_LOWWRITE" exception. When
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* this bit is set on a file, lowest-level processes can write to
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* the file, regardless of the file's level.
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*
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* There is also the LOMAC_ATTR_LOWNOOPEN flag, which prevents the
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* opening of a given object to subjects with a lower level than its
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* own.
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*
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* LOMAC_ATTR_NONETDEMOTE is set on subjects to prevent demotion on
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* network reads; LOMAC_ATTR_NODEMOTE is set on subjects to prevent
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* all demotion. Both of these will effectively set a high-level
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* subject as very trusted (and must be used sparingly).
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*/
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#define LOMAC_ATTR_LOWWRITE 0x00010000
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#define LOMAC_ATTR_LOWNOOPEN 0x00020000
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#define LOMAC_ATTR_NONETDEMOTE 0x00040000
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#define LOMAC_ATTR_NODEMOTE 0x00080000
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typedef struct proc lomac_subject_t;
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typedef struct lomac_object {
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enum lomac_object_type {
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LO_TYPE_LVNODE, /* LOMAC vnode */
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LO_TYPE_UVNODE, /* underlying vnode */
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LO_TYPE_VM_OBJECT, /* VM object, not OBJT_VNODE */
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LO_TYPE_PIPE, /* pipe */
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LO_TYPE_SOCKETPAIR /* local-domain socket in socketpair */
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} lo_type;
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union {
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struct vnode *vnode;
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vm_object_t vm_object;
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struct pipe *pipe;
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struct socket *socket;
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} lo_object;
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} lomac_object_t;
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typedef struct sbuf lomac_log_t;
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void init_subject_lattr(lomac_subject_t *, lattr_t *);
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void set_subject_lattr(lomac_subject_t *, lattr_t);
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void get_subject_lattr(lomac_subject_t *, lattr_t *);
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void set_object_lattr(lomac_object_t *, lattr_t);
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void get_object_lattr(const lomac_object_t *, lattr_t *);
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int subject_do_not_demote(lomac_subject_t *);
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#if 0
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void subject_propogate_lattr(lomac_subject_t *);
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#endif
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void kernel_vm_drop_perms(struct thread *, lattr_t *);
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#endif /* KERNEL_INTERFACE_H */
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