/*- * Copyright (c) 1999-2002 Robert N. M. Watson * Copyright (c) 2001-2004 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 Network * Associates Laboratories, 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. * * 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 acl; struct bpf_d; struct componentname; struct devfs_dirent; struct ifnet; struct image_params; struct inpcb; struct ipq; struct label; struct mac_policy_conf; struct mbuf; struct mount; struct pipepair; struct proc; struct sbuf; struct sockaddr; struct socket; struct sysctl_oid; struct sysctl_req; struct thread; struct ucred; struct uio; struct vattr; struct vnode; struct mac_policy_ops { /* * Policy module operations. */ void (*mpo_destroy)(struct mac_policy_conf *mpc); void (*mpo_init)(struct mac_policy_conf *mpc); /* * General policy-directed security system call so that policies * may implement new services without reserving explicit * system call numbers. */ int (*mpo_syscall)(struct thread *td, int call, void *arg); /* * Label operations. */ void (*mpo_init_bpfdesc_label)(struct label *label); void (*mpo_init_cred_label)(struct label *label); void (*mpo_init_devfsdirent_label)(struct label *label); void (*mpo_init_ifnet_label)(struct label *label); int (*mpo_init_inpcb_label)(struct label *label, int flag); int (*mpo_init_ipq_label)(struct label *label, int flag); int (*mpo_init_mbuf_label)(struct label *label, int flag); void (*mpo_init_mount_label)(struct label *label); void (*mpo_init_mount_fs_label)(struct label *label); int (*mpo_init_socket_label)(struct label *label, int flag); int (*mpo_init_socket_peer_label)(struct label *label, int flag); void (*mpo_init_pipe_label)(struct label *label); void (*mpo_init_proc_label)(struct label *label); void (*mpo_init_vnode_label)(struct label *label); void (*mpo_destroy_bpfdesc_label)(struct label *label); void (*mpo_destroy_cred_label)(struct label *label); void (*mpo_destroy_devfsdirent_label)(struct label *label); void (*mpo_destroy_ifnet_label)(struct label *label); void (*mpo_destroy_inpcb_label)(struct label *label); void (*mpo_destroy_ipq_label)(struct label *label); void (*mpo_destroy_mbuf_label)(struct label *label); void (*mpo_destroy_mount_label)(struct label *label); void (*mpo_destroy_mount_fs_label)(struct label *label); void (*mpo_destroy_socket_label)(struct label *label); void (*mpo_destroy_socket_peer_label)(struct label *label); void (*mpo_destroy_pipe_label)(struct label *label); void (*mpo_destroy_proc_label)(struct label *label); void (*mpo_destroy_vnode_label)(struct label *label); void (*mpo_copy_cred_label)(struct label *src, struct label *dest); void (*mpo_copy_mbuf_label)(struct label *src, struct label *dest); void (*mpo_copy_pipe_label)(struct label *src, struct label *dest); void (*mpo_copy_socket_label)(struct label *src, struct label *dest); void (*mpo_copy_vnode_label)(struct label *src, struct label *dest); int (*mpo_externalize_cred_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_externalize_ifnet_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_externalize_pipe_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_externalize_socket_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_externalize_socket_peer_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_externalize_vnode_label)(struct label *label, char *element_name, struct sbuf *sb, int *claimed); int (*mpo_internalize_cred_label)(struct label *label, char *element_name, char *element_data, int *claimed); int (*mpo_internalize_ifnet_label)(struct label *label, char *element_name, char *element_data, int *claimed); int (*mpo_internalize_pipe_label)(struct label *label, char *element_name, char *element_data, int *claimed); int (*mpo_internalize_socket_label)(struct label *label, char *element_name, char *element_data, int *claimed); int (*mpo_internalize_vnode_label)(struct label *label, char *element_name, char *element_data, int *claimed); /* * Labeling event operations: file system objects, and things that * look a lot like file system objects. */ void (*mpo_associate_vnode_devfs)(struct mount *mp, struct label *fslabel, struct devfs_dirent *de, struct label *delabel, struct vnode *vp, struct label *vlabel); int (*mpo_associate_vnode_extattr)(struct mount *mp, struct label *fslabel, struct vnode *vp, struct label *vlabel); void (*mpo_associate_vnode_singlelabel)(struct mount *mp, struct label *fslabel, struct vnode *vp, struct label *vlabel); void (*mpo_create_devfs_device)(struct mount *mp, dev_t dev, struct devfs_dirent *de, struct label *label); void (*mpo_create_devfs_directory)(struct mount *mp, char *dirname, int dirnamelen, struct devfs_dirent *de, struct label *label); void (*mpo_create_devfs_symlink)(struct ucred *cred, struct mount *mp, struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, struct label *delabel); int (*mpo_create_vnode_extattr)(struct ucred *cred, struct mount *mp, struct label *fslabel, struct vnode *dvp, struct label *dlabel, struct vnode *vp, struct label *vlabel, struct componentname *cnp); 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_setlabel_vnode_extattr)(struct ucred *cred, struct vnode *vp, struct label *vlabel, struct label *intlabel); void (*mpo_update_devfsdirent)(struct mount *mp, struct devfs_dirent *devfs_dirent, struct label *direntlabel, struct vnode *vp, struct label *vnodelabel); /* * 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 pipepair *pp, 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 pipepair *pp, 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_inpcb_from_socket)(struct socket *so, struct label *solabel, struct inpcb *inp, struct label *inplabel); 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_inpcb)(struct inpcb *inp, struct label *inplabel, struct mbuf *m, struct label *mlabel); 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_reflect_mbuf_icmp)(struct mbuf *m, struct label *mlabel); void (*mpo_reflect_mbuf_tcp)(struct mbuf *m, struct label *mlabel); 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); void (*mpo_inpcb_sosetlabel)(struct socket *so, struct label *label, struct inpcb *inp, struct label *inplabel); /* * Labeling event operations: processes. */ void (*mpo_execve_transition)(struct ucred *old, struct ucred *new, struct vnode *vp, struct label *vnodelabel, struct label *interpvnodelabel, struct image_params *imgp, struct label *execlabel); int (*mpo_execve_will_transition)(struct ucred *old, struct vnode *vp, struct label *vnodelabel, struct label *interpvnodelabel, struct image_params *imgp, struct label *execlabel); void (*mpo_create_proc0)(struct ucred *cred); void (*mpo_create_proc1)(struct ucred *cred); void (*mpo_relabel_cred)(struct ucred *cred, struct label *newlabel); void (*mpo_thread_userret)(struct thread *thread); /* * 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_inpcb_deliver)(struct inpcb *inp, struct label *inplabel, struct mbuf *m, struct label *mlabel); int (*mpo_check_kenv_dump)(struct ucred *cred); int (*mpo_check_kenv_get)(struct ucred *cred, char *name); int (*mpo_check_kenv_set)(struct ucred *cred, char *name, char *value); int (*mpo_check_kenv_unset)(struct ucred *cred, char *name); int (*mpo_check_kld_load)(struct ucred *cred, struct vnode *vp, struct label *vlabel); int (*mpo_check_kld_stat)(struct ucred *cred); int (*mpo_check_kld_unload)(struct ucred *cred); int (*mpo_check_mount_stat)(struct ucred *cred, struct mount *mp, struct label *mntlabel); int (*mpo_check_pipe_ioctl)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel, unsigned long cmd, void *data); int (*mpo_check_pipe_poll)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel); int (*mpo_check_pipe_read)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel); int (*mpo_check_pipe_relabel)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel, struct label *newlabel); int (*mpo_check_pipe_stat)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel); int (*mpo_check_pipe_write)(struct ucred *cred, struct pipepair *pp, struct label *pipelabel); 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_deliver)(struct socket *so, struct label *socketlabel, struct mbuf *m, struct label *mbuflabel); int (*mpo_check_socket_listen)(struct ucred *cred, struct socket *so, struct label *socketlabel); int (*mpo_check_socket_receive)(struct ucred *cred, struct socket *so, struct label *socketlabel); int (*mpo_check_socket_relabel)(struct ucred *cred, struct socket *so, struct label *socketlabel, struct label *newlabel); int (*mpo_check_socket_send)(struct ucred *cred, struct socket *so, struct label *socketlabel); int (*mpo_check_socket_visible)(struct ucred *cred, struct socket *so, struct label *socketlabel); int (*mpo_check_sysarch_ioperm)(struct ucred *cred); int (*mpo_check_system_acct)(struct ucred *cred, struct vnode *vp, struct label *vlabel); int (*mpo_check_system_nfsd)(struct ucred *cred); int (*mpo_check_system_reboot)(struct ucred *cred, int howto); int (*mpo_check_system_settime)(struct ucred *cred); int (*mpo_check_system_swapon)(struct ucred *cred, struct vnode *vp, struct label *label); int (*mpo_check_system_swapoff)(struct ucred *cred, struct vnode *vp, struct label *label); int (*mpo_check_system_sysctl)(struct ucred *cred, struct sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req); int (*mpo_check_vnode_access)(struct ucred *cred, struct vnode *vp, struct label *label, int acc_mode); 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, struct label *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_deleteextattr)(struct ucred *cred, struct vnode *vp, struct label *label, int attrnamespace, const char *name); int (*mpo_check_vnode_exec)(struct ucred *cred, struct vnode *vp, struct label *label, struct image_params *imgp, struct label *execlabel); 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_link)(struct ucred *cred, struct vnode *dvp, struct label *dlabel, struct vnode *vp, struct label *label, struct componentname *cnp); int (*mpo_check_vnode_listextattr)(struct ucred *cred, struct vnode *vp, struct label *label, int attrnamespace); int (*mpo_check_vnode_lookup)(struct ucred *cred, struct vnode *dvp, struct label *dlabel, struct componentname *cnp); int (*mpo_check_vnode_mmap)(struct ucred *cred, struct vnode *vp, struct label *label, int prot); void (*mpo_check_vnode_mmap_downgrade)(struct ucred *cred, struct vnode *vp, struct label *label, int *prot); int (*mpo_check_vnode_mprotect)(struct ucred *cred, struct vnode *vp, struct label *label, int prot); int (*mpo_check_vnode_open)(struct ucred *cred, struct vnode *vp, struct label *label, int acc_mode); int (*mpo_check_vnode_poll)(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *label); int (*mpo_check_vnode_read)(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *label); 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 *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *label); int (*mpo_check_vnode_write)(struct ucred *active_cred, struct ucred *file_cred, struct vnode *vp, struct label *label); }; struct mac_policy_conf { char *mpc_name; /* policy name */ char *mpc_fullname; /* policy full name */ struct mac_policy_ops *mpc_ops; /* policy operations */ 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 #define MPC_LOADTIME_FLAG_LABELMBUFS 0x00000004 /* Flags for the mpc_runtime_flags field. */ #define MPC_RUNTIME_FLAG_REGISTERED 0x00000001 #define MAC_POLICY_SET(mpops, mpname, mpfullname, mpflags, privdata_wanted) \ static struct mac_policy_conf mpname##_mac_policy_conf = { \ #mpname, \ mpfullname, \ mpops, \ mpflags, \ privdata_wanted, \ 0, \ }; \ static moduledata_t mpname##_mod = { \ #mpname, \ mac_policy_modevent, \ &mpname##_mac_policy_conf \ }; \ MODULE_DEPEND(mpname, kernel_mac_support, 1, 1, 1); \ 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_ */