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Diffstat (limited to 'sys/security/lomac/kernel_interface.h')
| -rw-r--r-- | sys/security/lomac/kernel_interface.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sys/security/lomac/kernel_interface.h b/sys/security/lomac/kernel_interface.h new file mode 100644 index 0000000..f9db05e --- /dev/null +++ b/sys/security/lomac/kernel_interface.h @@ -0,0 +1,101 @@ +/*- + * 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 */ |
