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freebsd/sys/security/mac/mac_framework.h
Robert Watson 92dbb82a47 Add a new MAC entry point, mac_thread_userret(td), which permits policy 
modules to perform MAC-related events when a thread returns to user
space.  This is required for policies that have floating process labels,
as it's not always possible to acquire the process lock at arbitrary
points in the stack during system call processing; process labels might
represent traditional authentication data, process history information,
or other data.

LOMAC will use this entry point to perform the process label update
prior to the thread returning to userspace, when plugged into the MAC
framework.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-02 02:42:38 +00:00

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