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freebsd-dev/sys/security/mac/mac_policy.h
Robert Watson 4b826b4cfc Change macop_t to const, use macop_t in MAC policy entry point definition 
structure.  This prevents a boatload of warnings in the MAC modules,
so we can hook them up to the build.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, NAI Labs
2002-08-01 17:32:01 +00:00

492 lines
19 KiB
C
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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.
*
* $FreeBSD$
*/
/*
* Kernel interface for MAC policy modules.
*/
#ifndef _SYS_MAC_POLICY_H
#define _SYS_MAC_POLICY_H
/*-
* Pluggable access control policy definition structure.
*
* List of operations that are performed as part of the implementation
* of a MAC policy. Policy implementors declare operations with a
* mac_policy_ops structure, and using the MAC_POLICY_SET() macro.
* If an entry point is not declared, then then the policy will be ignored
* during evaluation of that event or check.
*
* Operations are sorted first by general class of operation, then
* alphabetically.
*/
struct mac_policy_conf;
struct mac_policy_ops {
/*
* Policy module operations.
*/
void (*mpo_destroy)(struct mac_policy_conf *mpc);
void (*mpo_init)(struct mac_policy_conf *mpc);
/*
* Label operations.
*/
void (*mpo_init_bpfdesc)(struct bpf_d *, struct label *label);
void (*mpo_init_cred)(struct ucred *, struct label *label);
void (*mpo_init_devfsdirent)(struct devfs_dirent *,
struct label *label);
void (*mpo_init_ifnet)(struct ifnet *, struct label *label);
void (*mpo_init_ipq)(struct ipq *ipq, struct label *label);
int (*mpo_init_mbuf)(struct mbuf *, int how, struct label *label);
void (*mpo_init_mount)(struct mount *, struct label *mntlabel,
struct label *fslabel);
void (*mpo_init_socket)(struct socket *so, struct label *label,
struct label *peerlabel);
void (*mpo_init_pipe)(struct pipe *pipe, struct label *label);
void (*mpo_init_temp)(struct label *label);
void (*mpo_init_vnode)(struct vnode *, struct label *label);
void (*mpo_destroy_bpfdesc)(struct bpf_d *, struct label *label);
void (*mpo_destroy_cred)(struct ucred *, struct label *label);
void (*mpo_destroy_devfsdirent)(struct devfs_dirent *de,
struct label *label);
void (*mpo_destroy_ifnet)(struct ifnet *, struct label *label);
void (*mpo_destroy_ipq)(struct ipq *ipq, struct label *label);
void (*mpo_destroy_mbuf)(struct mbuf *, struct label *label);
void (*mpo_destroy_mount)(struct mount *, struct label *mntlabel,
struct label *fslabel);
void (*mpo_destroy_socket)(struct socket *so, struct label *label,
struct label *peerlabel);
void (*mpo_destroy_pipe)(struct pipe *pipe, struct label *label);
void (*mpo_destroy_temp)(struct label *label);
void (*mpo_destroy_vnode)(struct vnode *, struct label *label);
int (*mpo_externalize)(struct label *label, struct mac *extmac);
int (*mpo_internalize)(struct label *label, struct mac *extmac);
/*
* Labeling event operations: file system objects, and things that
* look a lot like file system objects.
*/
void (*mpo_create_devfs_device)(dev_t dev, struct devfs_dirent *de,
struct label *label);
void (*mpo_create_devfs_directory)(char *dirname, int dirnamelen,
struct devfs_dirent *de, struct label *label);
void (*mpo_create_devfs_vnode)(struct devfs_dirent *de,
struct label *direntlabel, struct vnode *vp,
struct label *vnodelabel);
void (*mpo_create_vnode)(struct ucred *cred, struct vnode *parent,
struct label *parentlabel, struct vnode *child,
struct label *childlabel);
void (*mpo_create_mount)(struct ucred *cred, struct mount *mp,
struct label *mntlabel, struct label *fslabel);
void (*mpo_create_root_mount)(struct ucred *cred, struct mount *mp,
struct label *mountlabel, struct label *fslabel);
void (*mpo_relabel_vnode)(struct ucred *cred, struct vnode *vp,
struct label *vnodelabel, struct label *label);
int (*mpo_stdcreatevnode_ea)(struct vnode *vp,
struct label *vnodelabel);
void (*mpo_update_devfsdirent)(struct devfs_dirent *devfs_dirent,
struct label *direntlabel, struct vnode *vp,
struct label *vnodelabel);
void (*mpo_update_procfsvnode)(struct vnode *vp,
struct label *vnodelabel, struct ucred *cred);
int (*mpo_update_vnode_from_extattr)(struct vnode *vp,
struct label *vnodelabel, struct mount *mp,
struct label *fslabel);
int (*mpo_update_vnode_from_externalized)(struct vnode *vp,
struct label *vnodelabel, struct mac *mac);
void (*mpo_update_vnode_from_mount)(struct vnode *vp,
struct label *vnodelabel, struct mount *mp,
struct label *fslabel);
/*
* Labeling event operations: IPC objects.
*/
void (*mpo_create_mbuf_from_socket)(struct socket *so,
struct label *socketlabel, struct mbuf *m,
struct label *mbuflabel);
void (*mpo_create_socket)(struct ucred *cred, struct socket *so,
struct label *socketlabel);
void (*mpo_create_socket_from_socket)(struct socket *oldsocket,
struct label *oldsocketlabel, struct socket *newsocket,
struct label *newsocketlabel);
void (*mpo_relabel_socket)(struct ucred *cred, struct socket *so,
struct label *oldlabel, struct label *newlabel);
void (*mpo_relabel_pipe)(struct ucred *cred, struct pipe *pipe,
struct label *oldlabel, struct label *newlabel);
void (*mpo_set_socket_peer_from_mbuf)(struct mbuf *mbuf,
struct label *mbuflabel, struct socket *so,
struct label *socketpeerlabel);
void (*mpo_set_socket_peer_from_socket)(struct socket *oldsocket,
struct label *oldsocketlabel, struct socket *newsocket,
struct label *newsocketpeerlabel);
void (*mpo_create_pipe)(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel);
/*
* Labeling event operations: network objects.
*/
void (*mpo_create_bpfdesc)(struct ucred *cred, struct bpf_d *bpf_d,
struct label *bpflabel);
void (*mpo_create_ifnet)(struct ifnet *ifnet,
struct label *ifnetlabel);
void (*mpo_create_ipq)(struct mbuf *fragment,
struct label *fragmentlabel, struct ipq *ipq,
struct label *ipqlabel);
void (*mpo_create_datagram_from_ipq)
(struct ipq *ipq, struct label *ipqlabel,
struct mbuf *datagram, struct label *datagramlabel);
void (*mpo_create_fragment)(struct mbuf *datagram,
struct label *datagramlabel, struct mbuf *fragment,
struct label *fragmentlabel);
void (*mpo_create_mbuf_from_mbuf)(struct mbuf *oldmbuf,
struct label *oldlabel, struct mbuf *newmbuf,
struct label *newlabel);
void (*mpo_create_mbuf_linklayer)(struct ifnet *ifnet,
struct label *ifnetlabel, struct mbuf *mbuf,
struct label *mbuflabel);
void (*mpo_create_mbuf_from_bpfdesc)(struct bpf_d *bpf_d,
struct label *bpflabel, struct mbuf *mbuf,
struct label *mbuflabel);
void (*mpo_create_mbuf_from_ifnet)(struct ifnet *ifnet,
struct label *ifnetlabel, struct mbuf *mbuf,
struct label *mbuflabel);
void (*mpo_create_mbuf_multicast_encap)(struct mbuf *oldmbuf,
struct label *oldmbuflabel, struct ifnet *ifnet,
struct label *ifnetlabel, struct mbuf *newmbuf,
struct label *newmbuflabel);
void (*mpo_create_mbuf_netlayer)(struct mbuf *oldmbuf,
struct label *oldmbuflabel, struct mbuf *newmbuf,
struct label *newmbuflabel);
int (*mpo_fragment_match)(struct mbuf *fragment,
struct label *fragmentlabel, struct ipq *ipq,
struct label *ipqlabel);
void (*mpo_relabel_ifnet)(struct ucred *cred, struct ifnet *ifnet,
struct label *ifnetlabel, struct label *newlabel);
void (*mpo_update_ipq)(struct mbuf *fragment,
struct label *fragmentlabel, struct ipq *ipq,
struct label *ipqlabel);
/*
* Labeling event operations: processes.
*/
void (*mpo_create_cred)(struct ucred *parent_cred,
struct ucred *child_cred);
void (*mpo_execve_transition)(struct ucred *old, struct ucred *new,
struct vnode *vp, struct label *vnodelabel);
int (*mpo_execve_will_transition)(struct ucred *old,
struct vnode *vp, struct label *vnodelabel);
void (*mpo_create_proc0)(struct ucred *cred);
void (*mpo_create_proc1)(struct ucred *cred);
void (*mpo_relabel_cred)(struct ucred *cred,
struct label *newlabel);
/*
* Access control checks.
*/
int (*mpo_check_bpfdesc_receive)(struct bpf_d *bpf_d,
struct label *bpflabel, struct ifnet *ifnet,
struct label *ifnetlabel);
int (*mpo_check_cred_relabel)(struct ucred *cred,
struct label *newlabel);
int (*mpo_check_cred_visible)(struct ucred *u1, struct ucred *u2);
int (*mpo_check_ifnet_relabel)(struct ucred *cred,
struct ifnet *ifnet, struct label *ifnetlabel,
struct label *newlabel);
int (*mpo_check_ifnet_transmit)(struct ifnet *ifnet,
struct label *ifnetlabel, struct mbuf *m,
struct label *mbuflabel);
int (*mpo_check_mount_stat)(struct ucred *cred, struct mount *mp,
struct label *mntlabel);
int (*mpo_check_pipe_ioctl)(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel, unsigned long cmd, void *data);
int (*mpo_check_pipe_op)(struct ucred *cred, struct pipe *pipe,
struct label *pipelabel, int op);
int (*mpo_check_pipe_relabel)(struct ucred *cred,
struct pipe *pipe, struct label *pipelabel,
struct label *newlabel);
int (*mpo_check_proc_debug)(struct ucred *cred,
struct proc *proc);
int (*mpo_check_proc_sched)(struct ucred *cred,
struct proc *proc);
int (*mpo_check_proc_signal)(struct ucred *cred,
struct proc *proc, int signum);
int (*mpo_check_socket_bind)(struct ucred *cred,
struct socket *so, struct label *socketlabel,
struct sockaddr *sockaddr);
int (*mpo_check_socket_connect)(struct ucred *cred,
struct socket *so, struct label *socketlabel,
struct sockaddr *sockaddr);
int (*mpo_check_socket_listen)(struct ucred *cred,
struct socket *so, struct label *socketlabel);
int (*mpo_check_socket_receive)(struct socket *so,
struct label *socketlabel, struct mbuf *m,
struct label *mbuflabel);
int (*mpo_check_socket_relabel)(struct ucred *cred,
struct socket *so, struct label *socketlabel,
struct label *newlabel);
int (*mpo_check_socket_visible)(struct ucred *cred,
struct socket *so, struct label *socketlabel);
int (*mpo_check_vnode_access)(struct ucred *cred,
struct vnode *vp, struct label *label, int flags);
int (*mpo_check_vnode_chdir)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel);
int (*mpo_check_vnode_chroot)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel);
int (*mpo_check_vnode_create)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel,
struct componentname *cnp, struct vattr *vap);
int (*mpo_check_vnode_delete)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel,
struct vnode *vp, void *label, struct componentname *cnp);
int (*mpo_check_vnode_deleteacl)(struct ucred *cred,
struct vnode *vp, struct label *label, acl_type_t type);
int (*mpo_check_vnode_exec)(struct ucred *cred, struct vnode *vp,
struct label *label);
int (*mpo_check_vnode_getacl)(struct ucred *cred,
struct vnode *vp, struct label *label, acl_type_t type);
int (*mpo_check_vnode_getextattr)(struct ucred *cred,
struct vnode *vp, struct label *label, int attrnamespace,
const char *name, struct uio *uio);
int (*mpo_check_vnode_lookup)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel,
struct componentname *cnp);
int (*mpo_check_vnode_open)(struct ucred *cred, struct vnode *vp,
struct label *label, mode_t acc_mode);
int (*mpo_check_vnode_readdir)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel);
int (*mpo_check_vnode_readlink)(struct ucred *cred,
struct vnode *vp, struct label *label);
int (*mpo_check_vnode_relabel)(struct ucred *cred,
struct vnode *vp, struct label *vnodelabel,
struct label *newlabel);
int (*mpo_check_vnode_rename_from)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel, struct vnode *vp,
struct label *label, struct componentname *cnp);
int (*mpo_check_vnode_rename_to)(struct ucred *cred,
struct vnode *dvp, struct label *dlabel, struct vnode *vp,
struct label *label, int samedir,
struct componentname *cnp);
int (*mpo_check_vnode_revoke)(struct ucred *cred,
struct vnode *vp, struct label *label);
int (*mpo_check_vnode_setacl)(struct ucred *cred,
struct vnode *vp, struct label *label, acl_type_t type,
struct acl *acl);
int (*mpo_check_vnode_setextattr)(struct ucred *cred,
struct vnode *vp, struct label *label, int attrnamespace,
const char *name, struct uio *uio);
int (*mpo_check_vnode_setflags)(struct ucred *cred,
struct vnode *vp, struct label *label, u_long flags);
int (*mpo_check_vnode_setmode)(struct ucred *cred,
struct vnode *vp, struct label *label, mode_t mode);
int (*mpo_check_vnode_setowner)(struct ucred *cred,
struct vnode *vp, struct label *label, uid_t uid,
gid_t gid);
int (*mpo_check_vnode_setutimes)(struct ucred *cred,
struct vnode *vp, struct label *label,
struct timespec atime, struct timespec mtime);
int (*mpo_check_vnode_stat)(struct ucred *cred, struct vnode *vp,
struct label *label);
vm_prot_t (*mpo_check_vnode_mmap_perms)(struct ucred *cred,
struct vnode *vp, struct label *label, int newmapping);
int (*mpo_check_vnode_op)(struct ucred *cred, struct vnode *vp,
struct label *label, int op);
};
typedef const void *macop_t;
enum mac_op_constant {
MAC_OP_LAST,
MAC_DESTROY,
MAC_INIT,
MAC_INIT_BPFDESC,
MAC_INIT_CRED,
MAC_INIT_DEVFSDIRENT,
MAC_INIT_IFNET,
MAC_INIT_IPQ,
MAC_INIT_MBUF,
MAC_INIT_MOUNT,
MAC_INIT_PIPE,
MAC_INIT_SOCKET,
MAC_INIT_TEMP,
MAC_INIT_VNODE,
MAC_DESTROY_BPFDESC,
MAC_DESTROY_CRED,
MAC_DESTROY_DEVFSDIRENT,
MAC_DESTROY_IFNET,
MAC_DESTROY_IPQ,
MAC_DESTROY_MBUF,
MAC_DESTROY_MOUNT,
MAC_DESTROY_PIPE,
MAC_DESTROY_SOCKET,
MAC_DESTROY_TEMP,
MAC_DESTROY_VNODE,
MAC_EXTERNALIZE,
MAC_INTERNALIZE,
MAC_CREATE_DEVFS_DEVICE,
MAC_CREATE_DEVFS_DIRECTORY,
MAC_CREATE_DEVFS_VNODE,
MAC_CREATE_VNODE,
MAC_CREATE_MOUNT,
MAC_CREATE_ROOT_MOUNT,
MAC_RELABEL_VNODE,
MAC_STDCREATEVNODE_EA,
MAC_UPDATE_DEVFSDIRENT,
MAC_UPDATE_PROCFSVNODE,
MAC_UPDATE_VNODE_FROM_EXTATTR,
MAC_UPDATE_VNODE_FROM_EXTERNALIZED,
MAC_UPDATE_VNODE_FROM_MOUNT,
MAC_CREATE_MBUF_FROM_SOCKET,
MAC_CREATE_PIPE,
MAC_CREATE_SOCKET,
MAC_CREATE_SOCKET_FROM_SOCKET,
MAC_RELABEL_PIPE,
MAC_RELABEL_SOCKET,
MAC_SET_SOCKET_PEER_FROM_MBUF,
MAC_SET_SOCKET_PEER_FROM_SOCKET,
MAC_CREATE_BPFDESC,
MAC_CREATE_DATAGRAM_FROM_IPQ,
MAC_CREATE_IFNET,
MAC_CREATE_IPQ,
MAC_CREATE_FRAGMENT,
MAC_CREATE_MBUF_FROM_MBUF,
MAC_CREATE_MBUF_LINKLAYER,
MAC_CREATE_MBUF_FROM_BPFDESC,
MAC_CREATE_MBUF_FROM_IFNET,
MAC_CREATE_MBUF_MULTICAST_ENCAP,
MAC_CREATE_MBUF_NETLAYER,
MAC_FRAGMENT_MATCH,
MAC_RELABEL_IFNET,
MAC_UPDATE_IPQ,
MAC_CREATE_CRED,
MAC_EXECVE_TRANSITION,
MAC_EXECVE_WILL_TRANSITION,
MAC_CREATE_PROC0,
MAC_CREATE_PROC1,
MAC_RELABEL_CRED,
MAC_CHECK_BPFDESC_RECEIVE,
MAC_CHECK_CRED_RELABEL,
MAC_CHECK_CRED_VISIBLE,
MAC_CHECK_IFNET_RELABEL,
MAC_CHECK_IFNET_TRANSMIT,
MAC_CHECK_MOUNT_STAT,
MAC_CHECK_PIPE_IOCTL,
MAC_CHECK_PIPE_OP,
MAC_CHECK_PIPE_RELABEL,
MAC_CHECK_PROC_DEBUG,
MAC_CHECK_PROC_SCHED,
MAC_CHECK_PROC_SIGNAL,
MAC_CHECK_SOCKET_BIND,
MAC_CHECK_SOCKET_CONNECT,
MAC_CHECK_SOCKET_LISTEN,
MAC_CHECK_SOCKET_RELABEL,
MAC_CHECK_SOCKET_RECEIVE,
MAC_CHECK_SOCKET_VISIBLE,
MAC_CHECK_VNODE_ACCESS,
MAC_CHECK_VNODE_CHDIR,
MAC_CHECK_VNODE_CHROOT,
MAC_CHECK_VNODE_CREATE,
MAC_CHECK_VNODE_DELETE,
MAC_CHECK_VNODE_DELETEACL,
MAC_CHECK_VNODE_EXEC,
MAC_CHECK_VNODE_GETACL,
MAC_CHECK_VNODE_GETEXTATTR,
MAC_CHECK_VNODE_LOOKUP,
MAC_CHECK_VNODE_OPEN,
MAC_CHECK_VNODE_READDIR,
MAC_CHECK_VNODE_READLINK,
MAC_CHECK_VNODE_RELABEL,
MAC_CHECK_VNODE_RENAME_FROM,
MAC_CHECK_VNODE_RENAME_TO,
MAC_CHECK_VNODE_REVOKE,
MAC_CHECK_VNODE_SETACL,
MAC_CHECK_VNODE_SETEXTATTR,
MAC_CHECK_VNODE_SETFLAGS,
MAC_CHECK_VNODE_SETMODE,
MAC_CHECK_VNODE_SETOWNER,
MAC_CHECK_VNODE_SETUTIMES,
MAC_CHECK_VNODE_STAT,
MAC_CHECK_VNODE_MMAP_PERMS,
MAC_CHECK_VNODE_OP,
};
struct mac_policy_op_entry {
enum mac_op_constant mpe_constant; /* what this hook implements */
macop_t mpe_function; /* hook's implementation */
};
struct mac_policy_conf {
char *mpc_name; /* policy name */
char *mpc_fullname; /* policy full name */
struct mac_policy_ops *mpc_ops; /* policy operations */
struct mac_policy_op_entry *mpc_entries; /* ops to fill in */
int mpc_loadtime_flags; /* flags */
int *mpc_field_off; /* security field */
int mpc_runtime_flags; /* flags */
LIST_ENTRY(mac_policy_conf) mpc_list; /* global list */
};
/* Flags for the mpc_loadtime_flags field. */
#define MPC_LOADTIME_FLAG_NOTLATE 0x00000001
#define MPC_LOADTIME_FLAG_UNLOADOK 0x00000002
/* Flags for the mpc_runtime_flags field. */
#define MPC_RUNTIME_FLAG_REGISTERED 0x00000001
#define MAC_POLICY_SET(mpents, mpname, mpfullname, mpflags, privdata_wanted) \
static struct mac_policy_conf mpname##_mac_policy_conf = { \
#mpname, \
mpfullname, \
NULL, \
mpents, \
mpflags, \
privdata_wanted, \
0, \
}; \
static moduledata_t mpname##_mod = { \
#mpname, \
mac_policy_modevent, \
&mpname##_mac_policy_conf \
}; \
DECLARE_MODULE(mpname, mpname##_mod, SI_SUB_MAC_POLICY, \
SI_ORDER_MIDDLE)
int mac_policy_modevent(module_t mod, int type, void *data);
#define LABEL_TO_SLOT(l, s) (l)->l_perpolicy[s]
#endif /* !_SYS_MAC_POLICY_H */
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