/*- * 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 #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 /* * 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_policy(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 */ #endif /* _KERNEL */ /* * XXXMAC: This shouldn't be exported to userland, but is because of ucred.h * and various other messes. */ #define MAC_MAX_POLICIES 4 struct label { int l_flags; union { void *l_ptr; long l_long; } l_perpolicy[MAC_MAX_POLICIES]; }; #ifdef _KERNEL /* * MAC entry point operations */ enum mac_ep_ops { MAC_OP_VNODE_READ, MAC_OP_VNODE_WRITE, MAC_OP_VNODE_POLL, MAC_OP_PIPE_READ, MAC_OP_PIPE_WRITE, MAC_OP_PIPE_STAT, MAC_OP_PIPE_POLL }; /* * 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 timespec; struct ucred; struct uio; struct vattr; struct vnode; #include /* 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); /* 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_op(struct ucred *cred, struct pipe *pipe, int op); int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, unsigned long cmd, void *data); 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_listen(struct ucred *cred, struct socket *so); int mac_check_socket_receive(struct socket *so, struct mbuf *m); 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_op(struct ucred *cred, struct vnode *vp, int op); int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, mode_t acc_mode); 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 *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 */