b371c939ce
checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
402 lines
15 KiB
C
402 lines
15 KiB
C
/*-
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* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
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* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by NAI Labs,
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* the 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 names of the authors 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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* $FreeBSD$
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*/
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/*
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* Userland/kernel interface for Mandatory Access Control.
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*
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* The POSIX.1e implementation page may be reached at:
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* http://www.trustedbsd.org/
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*/
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#ifndef _SYS_MAC_H
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#define _SYS_MAC_H
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#include <sys/_label.h>
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#ifndef _POSIX_MAC
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#define _POSIX_MAC
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#endif
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/*
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* XXXMAC: The single MAC extended attribute will be deprecated once
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* compound EA writes on a single target file can be performed cleanly
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* with UFS2.
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*/
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#define FREEBSD_MAC_EXTATTR_NAME "freebsd.mac"
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#define FREEBSD_MAC_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
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/*
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* MAC framework-related constants and limits.
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*/
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#define MAC_MAX_POLICY_NAME 32
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/*
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* XXXMAC: Per-policy structures will be moved from mac.h to per-policy
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* include files once the revised user interface is available.
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*/
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/*
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* Structures and constants associated with a Biba Integrity policy.
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* mac_biba represents a Biba label, with mb_type determining its properties,
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* and mb_grade represents the hierarchal grade if valid for the current
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* mb_type. These structures will move to mac_biba.h once we have dymamic
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* labels exposed to userland.
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*/
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struct mac_biba_element {
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u_short mbe_type;
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u_short mbe_grade;
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};
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/*
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* Biba labels consist of two components: a single label, and a label
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* range. Depending on the context, one or both may be used; the mb_flags
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* field permits the provider to indicate what fields are intended for
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* use.
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*/
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struct mac_biba {
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int mb_flags;
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struct mac_biba_element mb_single;
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struct mac_biba_element mb_rangelow, mb_rangehigh;
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};
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/*
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* Structures and constants associated with a Multi-Level Security policy.
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* mac_mls represents an MLS label, with mm_type determining its properties,
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* and mm_level represents the hierarchal sensitivity level if valid for the
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* current mm_type. These structures will move to mac_mls.h once we have
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* dynamic labels exposed to userland.
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*/
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struct mac_mls_element {
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u_short mme_type;
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u_short mme_level;
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};
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/*
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* MLS labels consist of two components: a single label, and a label
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* range. Depending on the context, one or both may be used; the mb_flags
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* field permits the provider to indicate what fields are intended for
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* use.
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*/
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struct mac_mls {
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int mm_flags;
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struct mac_mls_element mm_single;
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struct mac_mls_element mm_rangelow, mm_rangehigh;
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};
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/*
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* Structures and constants associated with a Type Enforcement policy.
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* mac_te represents a Type Enforcement label.
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*/
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#define MAC_TE_TYPE_MAXLEN 32
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struct mac_te {
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char mt_type[MAC_TE_TYPE_MAXLEN+1]; /* TE type */
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};
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struct mac_sebsd {
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uint32_t ms_psid; /* persistent sid storage */
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};
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/*
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* Composite structures and constants which combine the various policy
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* elements into common structures to be associated with subjects and
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* objects.
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*/
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struct mac {
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int m_macflags;
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struct mac_biba m_biba;
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struct mac_mls m_mls;
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struct mac_te m_te;
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struct mac_sebsd m_sebsd;
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};
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typedef struct mac *mac_t;
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#define MAC_FLAG_INITIALIZED 0x00000001 /* Is initialized. */
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#ifndef _KERNEL
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/*
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* POSIX.1e functions visible in the application namespace.
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*/
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int mac_dominate(const mac_t _labela, const mac_t _labelb);
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int mac_equal(const mac_t labela, const mac_t _labelb);
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int mac_free(void *_buf_p);
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mac_t mac_from_text(const char *_text_p);
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mac_t mac_get_fd(int _fildes);
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mac_t mac_get_file(const char *_path_p);
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mac_t mac_get_proc(void);
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mac_t mac_glb(const mac_t _labela, const mac_t _labelb);
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mac_t mac_lub(const mac_t _labela, const mac_t _labelb);
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int mac_set_fd(int _fildes, const mac_t _label);
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int mac_set_file(const char *_path_p, mac_t _label);
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int mac_set_proc(const mac_t _label);
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ssize_t mac_size(mac_t _label);
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char * mac_to_text(const mac_t _label, size_t *_len_p);
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int mac_valid(const mac_t _label);
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/*
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* Extensions to POSIX.1e visible in the application namespace.
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*/
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int mac_is_present_np(const char *_policyname);
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int mac_syscall(const char *_policyname, int call, void *arg);
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/*
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* System calls wrapped by some POSIX.1e functions.
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*/
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int __mac_get_fd(int _fd, struct mac *_mac_p);
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int __mac_get_file(const char *_path_p, struct mac *_mac_p);
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int __mac_get_proc(struct mac *_mac_p);
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int __mac_set_fd(int fd, struct mac *_mac_p);
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int __mac_set_file(const char *_path_p, struct mac *_mac_p);
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int __mac_set_proc(struct mac *_mac_p);
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#else /* _KERNEL */
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/*
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* Kernel functions to manage and evaluate labels.
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*/
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struct bpf_d;
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struct componentname;
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struct devfs_dirent;
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struct ifnet;
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struct ifreq;
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struct ipq;
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struct mbuf;
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struct mount;
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struct proc;
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struct sockaddr;
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struct socket;
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struct pipe;
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struct thread;
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struct timespec;
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struct ucred;
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struct uio;
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struct vattr;
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struct vnode;
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#include <sys/acl.h> /* XXX acl_type_t */
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struct vop_refreshlabel_args;
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struct vop_setlabel_args;
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/*
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* Label operations.
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*/
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void mac_init_bpfdesc(struct bpf_d *);
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void mac_init_cred(struct ucred *);
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void mac_init_devfsdirent(struct devfs_dirent *);
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void mac_init_ifnet(struct ifnet *);
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void mac_init_ipq(struct ipq *);
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int mac_init_socket(struct socket *, int flag);
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void mac_init_pipe(struct pipe *);
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int mac_init_mbuf(struct mbuf *m, int flag);
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void mac_init_mount(struct mount *);
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void mac_init_vnode(struct vnode *);
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void mac_destroy_bpfdesc(struct bpf_d *);
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void mac_destroy_cred(struct ucred *);
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void mac_destroy_devfsdirent(struct devfs_dirent *);
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void mac_destroy_ifnet(struct ifnet *);
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void mac_destroy_ipq(struct ipq *);
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void mac_destroy_socket(struct socket *);
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void mac_destroy_pipe(struct pipe *);
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void mac_destroy_mbuf(struct mbuf *);
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void mac_destroy_mount(struct mount *);
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void mac_destroy_vnode(struct vnode *);
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/*
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* Labeling event operations: file system objects, and things that
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* look a lot like file system objects.
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*/
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void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de);
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void mac_create_devfs_directory(char *dirname, int dirnamelen,
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struct devfs_dirent *de);
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void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp);
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void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd,
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struct devfs_dirent *de);
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void mac_create_vnode(struct ucred *cred, struct vnode *parent,
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struct vnode *child);
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void mac_create_mount(struct ucred *cred, struct mount *mp);
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void mac_create_root_mount(struct ucred *cred, struct mount *mp);
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void mac_relabel_vnode(struct ucred *cred, struct vnode *vp,
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struct label *newlabel);
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void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp);
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void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred);
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void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp);
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/*
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* Labeling event operations: IPC objects.
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*/
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void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m);
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void mac_create_socket(struct ucred *cred, struct socket *socket);
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void mac_create_socket_from_socket(struct socket *oldsocket,
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struct socket *newsocket);
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void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf,
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struct socket *socket);
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void mac_set_socket_peer_from_socket(struct socket *oldsocket,
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struct socket *newsocket);
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void mac_create_pipe(struct ucred *cred, struct pipe *pipe);
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/*
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* Labeling event operations: network objects.
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*/
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void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d);
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void mac_create_ifnet(struct ifnet *ifp);
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void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq);
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void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram);
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void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment);
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void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf);
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void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m);
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void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m);
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void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m);
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void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf,
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struct ifnet *ifnet, struct mbuf *newmbuf);
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void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf);
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int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq);
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void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq);
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/*
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* Labeling event operations: processes.
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*/
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void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child);
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void mac_execve_transition(struct ucred *old, struct ucred *new,
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struct vnode *vp);
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int mac_execve_will_transition(struct ucred *old, struct vnode *vp);
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void mac_create_proc0(struct ucred *cred);
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void mac_create_proc1(struct ucred *cred);
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void mac_thread_userret(struct thread *td);
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/* Access control checks. */
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int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet);
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int mac_check_cred_visible(struct ucred *u1, struct ucred *u2);
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int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m);
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int mac_check_mount_stat(struct ucred *cred, struct mount *mp);
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int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe,
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unsigned long cmd, void *data);
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int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe);
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int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe);
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int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe);
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int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe);
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int mac_check_proc_debug(struct ucred *cred, struct proc *proc);
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int mac_check_proc_sched(struct ucred *cred, struct proc *proc);
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int mac_check_proc_signal(struct ucred *cred, struct proc *proc,
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int signum);
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int mac_check_socket_bind(struct ucred *cred, struct socket *so,
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struct sockaddr *sockaddr);
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int mac_check_socket_connect(struct ucred *cred, struct socket *so,
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struct sockaddr *sockaddr);
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int mac_check_socket_deliver(struct socket *so, struct mbuf *m);
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int mac_check_socket_listen(struct ucred *cred, struct socket *so);
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int mac_check_socket_receive(struct ucred *cred, struct socket *so);
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int mac_check_socket_send(struct ucred *cred, struct socket *so);
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int mac_check_socket_visible(struct ucred *cred, struct socket *so);
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int mac_check_vnode_access(struct ucred *cred, struct vnode *vp,
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int flags);
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int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp);
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int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp);
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int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
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struct componentname *cnp, struct vattr *vap);
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int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp,
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struct vnode *vp, struct componentname *cnp);
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int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type);
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int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp);
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int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type);
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int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp,
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int attrnamespace, const char *name, struct uio *uio);
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int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
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struct vnode *vp, struct componentname *cnp);
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int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp,
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struct componentname *cnp);
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int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
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int prot);
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int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp,
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int prot);
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int mac_check_vnode_open(struct ucred *cred, struct vnode *vp,
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mode_t acc_mode);
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int mac_check_vnode_poll(struct ucred *active_cred,
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struct ucred *file_cred, struct vnode *vp);
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int mac_check_vnode_read(struct ucred *active_cred,
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struct ucred *file_cred, struct vnode *vp);
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int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp);
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int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp);
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int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
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struct vnode *vp, struct componentname *cnp);
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int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
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struct vnode *vp, int samedir, struct componentname *cnp);
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int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp);
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int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
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acl_type_t type, struct acl *acl);
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int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
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int attrnamespace, const char *name, struct uio *uio);
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int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
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u_long flags);
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int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
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mode_t mode);
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int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
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uid_t uid, gid_t gid);
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int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
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struct timespec atime, struct timespec mtime);
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int mac_check_vnode_stat(struct ucred *active_cred,
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struct ucred *file_cred, struct vnode *vp);
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int mac_check_vnode_write(struct ucred *active_cred,
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struct ucred *file_cred, struct vnode *vp);
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int mac_getsockopt_label_get(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr,
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struct ifnet *ifnet);
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int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr,
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struct ifnet *ifnet);
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int mac_setsockopt_label_set(struct ucred *cred, struct socket *so,
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struct mac *extmac);
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int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe,
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struct label *label);
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/*
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* Calls to help various file systems implement labeling functionality
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* using their existing EA implementation.
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*/
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int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp,
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struct ucred *cred);
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int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap);
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int vop_stdsetlabel_ea(struct vop_setlabel_args *ap);
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#endif /* _KERNEL */
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#endif /* !_SYS_MAC_H */
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