diff options
author | rwatson <rwatson@FreeBSD.org> | 2004-02-26 03:51:04 +0000 |
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committer | rwatson <rwatson@FreeBSD.org> | 2004-02-26 03:51:04 +0000 |
commit | 94f1c2c12e72d156571a8216199086ba2d775312 (patch) | |
tree | df95c136876112ff706c8baeb8ea221b480534f1 /sys/security/mac/mac_socket.c | |
parent | 4733577ea0d69a039bfa9c7353c6ec303e191f11 (diff) | |
download | FreeBSD-src-94f1c2c12e72d156571a8216199086ba2d775312.zip FreeBSD-src-94f1c2c12e72d156571a8216199086ba2d775312.tar.gz |
Move inet and inet6 related MAC Framework entry points from mac_net.c
to a new mac_inet.c. This code is now conditionally compiled based
on inet support being compiled into the kernel.
Move socket related MAC Framework entry points from mac_net.c to a new
mac_socket.c.
To do this, some additional _enforce MIB variables are now non-static.
In addition, mbuf_to_label() is now mac_mbuf_to_label() and non-static.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, McAfee Research
Diffstat (limited to 'sys/security/mac/mac_socket.c')
-rw-r--r-- | sys/security/mac/mac_socket.c | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/sys/security/mac/mac_socket.c b/sys/security/mac/mac_socket.c new file mode 100644 index 0000000..1ddef70 --- /dev/null +++ b/sys/security/mac/mac_socket.c @@ -0,0 +1,487 @@ +/*- + * Copyright (c) 1999-2002 Robert N. M. Watson + * Copyright (c) 2001 Ilmar S. Habibulin + * Copyright (c) 2001-2004 Networks Associates Technology, Inc. + * All rights reserved. + * + * This software was developed by Robert Watson and Ilmar Habibulin 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_mac.h" + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mutex.h> +#include <sys/mac.h> +#include <sys/sbuf.h> +#include <sys/systm.h> +#include <sys/mount.h> +#include <sys/file.h> +#include <sys/namei.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sysctl.h> + +#include <sys/mac_policy.h> + +#include <net/bpfdesc.h> +#include <net/if.h> +#include <net/if_var.h> + +#include <netinet/in.h> +#include <netinet/in_pcb.h> +#include <netinet/ip_var.h> + +#include <security/mac/mac_internal.h> + +/* + * mac_enforce_socket is used by the inet code when delivering to an inpcb + * without hitting the socket layer, and has to be non-static for now. + */ +int mac_enforce_socket = 1; +SYSCTL_INT(_security_mac, OID_AUTO, enforce_socket, CTLFLAG_RW, + &mac_enforce_socket, 0, "Enforce MAC policy on socket operations"); +TUNABLE_INT("security.mac.enforce_socket", &mac_enforce_socket); + +#ifdef MAC_DEBUG +static unsigned int nmacsockets; + +SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, sockets, CTLFLAG_RD, + &nmacsockets, 0, "number of sockets in use"); +#endif + +struct label * +mac_socket_label_alloc(int flag) +{ + struct label *label; + int error; + + label = mac_labelzone_alloc(flag); + if (label == NULL) + return (NULL); + + MAC_CHECK(init_socket_label, label, flag); + if (error) { + MAC_PERFORM(destroy_socket_label, label); + mac_labelzone_free(label); + return (NULL); + } + MAC_DEBUG_COUNTER_INC(&nmacsockets); + return (label); +} + +static struct label * +mac_socket_peer_label_alloc(int flag) +{ + struct label *label; + int error; + + label = mac_labelzone_alloc(flag); + if (label == NULL) + return (NULL); + + MAC_CHECK(init_socket_peer_label, label, flag); + if (error) { + MAC_PERFORM(destroy_socket_peer_label, label); + mac_labelzone_free(label); + return (NULL); + } + MAC_DEBUG_COUNTER_INC(&nmacsockets); + return (label); +} + +int +mac_init_socket(struct socket *so, int flag) +{ + + so->so_label = mac_socket_label_alloc(flag); + if (so->so_label == NULL) + return (ENOMEM); + so->so_peerlabel = mac_socket_peer_label_alloc(flag); + if (so->so_peerlabel == NULL) { + mac_socket_label_free(so->so_label); + so->so_label = NULL; + return (ENOMEM); + } + return (0); +} + +void +mac_socket_label_free(struct label *label) +{ + + MAC_PERFORM(destroy_socket_label, label); + mac_labelzone_free(label); + MAC_DEBUG_COUNTER_DEC(&nmacsockets); +} + +static void +mac_socket_peer_label_free(struct label *label) +{ + + MAC_PERFORM(destroy_socket_peer_label, label); + mac_labelzone_free(label); + MAC_DEBUG_COUNTER_DEC(&nmacsockets); +} + +void +mac_destroy_socket(struct socket *socket) +{ + + mac_socket_label_free(socket->so_label); + socket->so_label = NULL; + mac_socket_peer_label_free(socket->so_peerlabel); + socket->so_peerlabel = NULL; +} + +void +mac_copy_socket_label(struct label *src, struct label *dest) +{ + + MAC_PERFORM(copy_socket_label, src, dest); +} + +int +mac_externalize_socket_label(struct label *label, char *elements, + char *outbuf, size_t outbuflen) +{ + int error; + + MAC_EXTERNALIZE(socket, label, elements, outbuf, outbuflen); + + return (error); +} + +static int +mac_externalize_socket_peer_label(struct label *label, char *elements, + char *outbuf, size_t outbuflen) +{ + int error; + + MAC_EXTERNALIZE(socket_peer, label, elements, outbuf, outbuflen); + + return (error); +} + +int +mac_internalize_socket_label(struct label *label, char *string) +{ + int error; + + MAC_INTERNALIZE(socket, label, string); + + return (error); +} + +void +mac_create_socket(struct ucred *cred, struct socket *socket) +{ + + MAC_PERFORM(create_socket, cred, socket, socket->so_label); +} + +void +mac_create_socket_from_socket(struct socket *oldsocket, + struct socket *newsocket) +{ + + MAC_PERFORM(create_socket_from_socket, oldsocket, oldsocket->so_label, + newsocket, newsocket->so_label); +} + +static void +mac_relabel_socket(struct ucred *cred, struct socket *socket, + struct label *newlabel) +{ + + MAC_PERFORM(relabel_socket, cred, socket, socket->so_label, newlabel); +} + +void +mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, struct socket *socket) +{ + struct label *label; + + label = mac_mbuf_to_label(mbuf); + + MAC_PERFORM(set_socket_peer_from_mbuf, mbuf, label, socket, + socket->so_peerlabel); +} + +void +mac_set_socket_peer_from_socket(struct socket *oldsocket, + struct socket *newsocket) +{ + + MAC_PERFORM(set_socket_peer_from_socket, oldsocket, + oldsocket->so_label, newsocket, newsocket->so_peerlabel); +} + +void +mac_create_mbuf_from_socket(struct socket *socket, struct mbuf *mbuf) +{ + struct label *label; + + label = mac_mbuf_to_label(mbuf); + + MAC_PERFORM(create_mbuf_from_socket, socket, socket->so_label, mbuf, + label); +} + +int +mac_check_socket_bind(struct ucred *ucred, struct socket *socket, + struct sockaddr *sockaddr) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_bind, ucred, socket, socket->so_label, + sockaddr); + + return (error); +} + +int +mac_check_socket_connect(struct ucred *cred, struct socket *socket, + struct sockaddr *sockaddr) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_connect, cred, socket, socket->so_label, + sockaddr); + + return (error); +} + +int +mac_check_socket_deliver(struct socket *socket, struct mbuf *mbuf) +{ + struct label *label; + int error; + + if (!mac_enforce_socket) + return (0); + + label = mac_mbuf_to_label(mbuf); + + MAC_CHECK(check_socket_deliver, socket, socket->so_label, mbuf, + label); + + return (error); +} + +int +mac_check_socket_listen(struct ucred *cred, struct socket *socket) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_listen, cred, socket, socket->so_label); + return (error); +} + +int +mac_check_socket_receive(struct ucred *cred, struct socket *so) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_receive, cred, so, so->so_label); + + return (error); +} + +static int +mac_check_socket_relabel(struct ucred *cred, struct socket *socket, + struct label *newlabel) +{ + int error; + + MAC_CHECK(check_socket_relabel, cred, socket, socket->so_label, + newlabel); + + return (error); +} + +int +mac_check_socket_send(struct ucred *cred, struct socket *so) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_send, cred, so, so->so_label); + + return (error); +} + +int +mac_check_socket_visible(struct ucred *cred, struct socket *socket) +{ + int error; + + if (!mac_enforce_socket) + return (0); + + MAC_CHECK(check_socket_visible, cred, socket, socket->so_label); + + return (error); +} + +int +mac_socket_label_set(struct ucred *cred, struct socket *so, + struct label *label) +{ + int error; + + error = mac_check_socket_relabel(cred, so, label); + if (error) + return (error); + + mac_relabel_socket(cred, so, label); + + /* + * If the protocol has expressed interest in socket layer changes, + * such as if it needs to propagate changes to a cached pcb + * label from the socket, notify it of the label change while + * holding the socket lock. + */ + if (so->so_proto->pr_usrreqs->pru_sosetlabel != NULL) + (so->so_proto->pr_usrreqs->pru_sosetlabel)(so); + + return (0); +} + +int +mac_setsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac) +{ + struct label *intlabel; + char *buffer; + int error; + + error = mac_check_structmac_consistent(mac); + if (error) + return (error); + + buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); + error = copyinstr(mac->m_string, buffer, mac->m_buflen, NULL); + if (error) { + free(buffer, M_MACTEMP); + return (error); + } + + intlabel = mac_socket_label_alloc(M_WAITOK); + error = mac_internalize_socket_label(intlabel, buffer); + free(buffer, M_MACTEMP); + if (error) + goto out; + + /* XXX: Socket lock here. */ + error = mac_socket_label_set(cred, so, intlabel); + /* XXX: Socket unlock here. */ +out: + mac_socket_label_free(intlabel); + return (error); +} + +int +mac_getsockopt_label(struct ucred *cred, struct socket *so, struct mac *mac) +{ + char *buffer, *elements; + int error; + + error = mac_check_structmac_consistent(mac); + if (error) + return (error); + + elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); + error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL); + if (error) { + free(elements, M_MACTEMP); + return (error); + } + + buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO); + error = mac_externalize_socket_label(so->so_label, elements, + buffer, mac->m_buflen); + if (error == 0) + error = copyout(buffer, mac->m_string, strlen(buffer)+1); + + free(buffer, M_MACTEMP); + free(elements, M_MACTEMP); + + return (error); +} + +int +mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so, + struct mac *mac) +{ + char *elements, *buffer; + int error; + + error = mac_check_structmac_consistent(mac); + if (error) + return (error); + + elements = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK); + error = copyinstr(mac->m_string, elements, mac->m_buflen, NULL); + if (error) { + free(elements, M_MACTEMP); + return (error); + } + + buffer = malloc(mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO); + error = mac_externalize_socket_peer_label(so->so_peerlabel, + elements, buffer, mac->m_buflen); + if (error == 0) + error = copyout(buffer, mac->m_string, strlen(buffer)+1); + + free(buffer, M_MACTEMP); + free(elements, M_MACTEMP); + + return (error); +} |