+/*
+ * Copyright (c) 2007 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+/*-
+ * Copyright (c) 1999-2002 Robert N. M. Watson
+ * Copyright (c) 2001 Ilmar S. Habibulin
+ * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
+ * Copyright (c) 2005 SPARTA, 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 McAfee
+ * Research, the Technology Research Division of Network Associates, Inc.
+ * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
+ * DARPA CHATS research program.
+ *
+ * This software was enhanced by SPARTA ISSO under SPAWAR contract
+ * N66001-04-C-6019 ("SEFOS").
+ *
+ * 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>
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.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/kpi_socket.h>
+
+#include <net/if.h>
+#include <net/if_var.h>
+
+#include <netinet/in.h>
+#include <netinet/ip_var.h>
+
+#include <security/mac_internal.h>
+
+#if CONFIG_MACF_SOCKET
+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(socket_label_init, label, flag);
+ if (error) {
+ MAC_PERFORM(socket_label_destroy, label);
+ mac_labelzone_free(label);
+ return (NULL);
+ }
+
+ 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(socketpeer_label_init, label, flag);
+ if (error) {
+ MAC_PERFORM(socketpeer_label_destroy, label);
+ mac_labelzone_free(label);
+ return (NULL);
+ }
+
+ return (label);
+}
+
+int
+mac_socket_label_init(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(socket_label_destroy, label);
+ mac_labelzone_free(label);
+}
+
+static void
+mac_socket_peer_label_free(struct label *label)
+{
+
+ MAC_PERFORM(socketpeer_label_destroy, label);
+ mac_labelzone_free(label);
+}
+
+void
+mac_socket_label_destroy(struct socket *so)
+{
+
+ if (so->so_label != NULL) {
+ mac_socket_label_free(so->so_label);
+ so->so_label = NULL;
+ }
+ if (so->so_peerlabel != NULL) {
+ mac_socket_peer_label_free(so->so_peerlabel);
+ so->so_peerlabel = NULL;
+ }
+}
+
+void
+mac_socket_label_copy(struct label *src, struct label *dest)
+{
+
+ MAC_PERFORM(socket_label_copy, src, dest);
+}
+
+int
+mac_socket_label_externalize(struct label *label, char *elements,
+ char *outbuf, size_t outbuflen)
+{
+ int error;
+
+ error = MAC_EXTERNALIZE(socket, label, elements, outbuf, outbuflen);
+
+ return (error);
+}
+
+static int
+mac_socketpeer_label_externalize(struct label *label, char *elements,
+ char *outbuf, size_t outbuflen)
+{
+ int error;
+
+ error = MAC_EXTERNALIZE(socketpeer, label, elements, outbuf, outbuflen);
+
+ return (error);
+}
+
+int
+mac_socket_label_internalize(struct label *label, char *string)
+{
+ int error;
+
+ error = MAC_INTERNALIZE(socket, label, string);
+
+ return (error);
+}
+
+void
+mac_socket_label_associate(struct ucred *cred, struct socket *so)
+{
+ if (!mac_socket_enforce)
+ return;
+
+ MAC_PERFORM(socket_label_associate, cred,
+ (socket_t)so, so->so_label);
+}
+
+void
+mac_socket_label_associate_accept(struct socket *oldsocket,
+ struct socket *newsocket)
+{
+ if (!mac_socket_enforce)
+ return;
+
+ MAC_PERFORM(socket_label_associate_accept,
+ (socket_t)oldsocket, oldsocket->so_label,
+ (socket_t)newsocket, newsocket->so_label);
+}
+
+#if CONFIG_MACF_SOCKET && CONFIG_MACF_NET
+void
+mac_socketpeer_label_associate_mbuf(struct mbuf *mbuf, struct socket *so)
+{
+ struct label *label;
+
+ if (!mac_socket_enforce && !mac_net_enforce)
+ return;
+
+ label = mac_mbuf_to_label(mbuf);
+
+ /* Policy must deal with NULL label (unlabeled mbufs) */
+ MAC_PERFORM(socketpeer_label_associate_mbuf, mbuf, label,
+ (socket_t)so, so->so_peerlabel);
+}
+#else
+void
+mac_socketpeer_label_associate_mbuf(__unused struct mbuf *mbuf,
+ __unused struct socket *so)
+{
+ return;
+}
+#endif
+
+void
+mac_socketpeer_label_associate_socket(struct socket *oldsocket,
+ struct socket *newsocket)
+{
+ if (!mac_socket_enforce)
+ return;
+
+ MAC_PERFORM(socketpeer_label_associate_socket,
+ (socket_t)oldsocket, oldsocket->so_label,
+ (socket_t)newsocket, newsocket->so_peerlabel);
+}
+
+int
+mac_socket_check_kqfilter(kauth_cred_t cred, struct knote *kn,
+ struct socket *so)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_kqfilter, cred, kn,
+ (socket_t)so, so->so_label);
+ return (error);
+}
+
+static int
+mac_socket_check_label_update(kauth_cred_t cred, struct socket *so,
+ struct label *newlabel)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_label_update, cred,
+ (socket_t)so, so->so_label,
+ newlabel);
+ return (error);
+}
+
+int
+mac_socket_check_select(kauth_cred_t cred, struct socket *so, int which)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_select, cred,
+ (socket_t)so, so->so_label, which);
+ return (error);
+}
+
+int
+mac_socket_check_stat(kauth_cred_t cred, struct socket *so)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_stat, cred,
+ (socket_t)so, so->so_label);
+ return (error);
+}
+
+
+int
+mac_socket_label_update(kauth_cred_t cred, struct socket *so, struct label *label)
+{
+ int error;
+#if 0
+ if (!mac_socket_enforce)
+ return;
+#endif
+ error = mac_socket_check_label_update(cred, so, label);
+ if (error)
+ return (error);
+
+ MAC_PERFORM(socket_label_update, cred,
+ (socket_t)so, so->so_label, label);
+
+#if CONFIG_MACF_NET
+ /*
+ * 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.
+ * XXXMAC - are there cases when we should not do this?
+ */
+ mac_inpcb_label_update(so);
+#endif
+ return (0);
+}
+
+int
+mac_setsockopt_label(kauth_cred_t cred, struct socket *so, struct mac *mac)
+{
+ struct label *intlabel;
+ char *buffer;
+ int error;
+ size_t len;
+
+ error = mac_check_structmac_consistent(mac);
+ if (error)
+ return (error);
+
+ MALLOC(buffer, char *, mac->m_buflen, M_MACTEMP, M_WAITOK);
+ error = copyinstr(CAST_USER_ADDR_T(mac->m_string), buffer,
+ mac->m_buflen, &len);
+ if (error) {
+ FREE(buffer, M_MACTEMP);
+ return (error);
+ }
+
+ intlabel = mac_socket_label_alloc(MAC_WAITOK);
+ error = mac_socket_label_internalize(intlabel, buffer);
+ FREE(buffer, M_MACTEMP);
+ if (error)
+ goto out;
+
+ error = mac_socket_label_update(cred, so, intlabel);
+out:
+ mac_socket_label_free(intlabel);
+ return (error);
+}
+
+int
+mac_socket_label_get(__unused kauth_cred_t cred, struct socket *so,
+ struct mac *mac)
+{
+ char *buffer, *elements;
+ struct label *intlabel;
+ int error;
+ size_t len;
+
+ error = mac_check_structmac_consistent(mac);
+ if (error)
+ return (error);
+
+ MALLOC(elements, char *, mac->m_buflen, M_MACTEMP, M_WAITOK);
+ error = copyinstr(CAST_USER_ADDR_T(mac->m_string), elements,
+ mac->m_buflen, &len);
+ if (error) {
+ FREE(elements, M_MACTEMP);
+ return (error);
+ }
+
+ MALLOC(buffer, char *, mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
+ intlabel = mac_socket_label_alloc(MAC_WAITOK);
+ mac_socket_label_copy(so->so_label, intlabel);
+ error = mac_socket_label_externalize(intlabel, elements, buffer,
+ mac->m_buflen);
+ mac_socket_label_free(intlabel);
+ if (error == 0)
+ error = copyout(buffer, CAST_USER_ADDR_T(mac->m_string),
+ strlen(buffer)+1);
+
+ FREE(buffer, M_MACTEMP);
+ FREE(elements, M_MACTEMP);
+
+ return (error);
+}
+
+int
+mac_socketpeer_label_get(__unused kauth_cred_t cred, struct socket *so,
+ struct mac *mac)
+{
+ char *elements, *buffer;
+ struct label *intlabel;
+ int error;
+ size_t len;
+
+ error = mac_check_structmac_consistent(mac);
+ if (error)
+ return (error);
+
+ MALLOC(elements, char *, mac->m_buflen, M_MACTEMP, M_WAITOK);
+ error = copyinstr(CAST_USER_ADDR_T(mac->m_string), elements,
+ mac->m_buflen, &len);
+ if (error) {
+ FREE(elements, M_MACTEMP);
+ return (error);
+ }
+
+ MALLOC(buffer, char *, mac->m_buflen, M_MACTEMP, M_WAITOK | M_ZERO);
+ intlabel = mac_socket_label_alloc(MAC_WAITOK);
+ mac_socket_label_copy(so->so_peerlabel, intlabel);
+ error = mac_socketpeer_label_externalize(intlabel, elements, buffer,
+ mac->m_buflen);
+ mac_socket_label_free(intlabel);
+ if (error == 0)
+ error = copyout(buffer, CAST_USER_ADDR_T(mac->m_string),
+ strlen(buffer)+1);
+
+ FREE(buffer, M_MACTEMP);
+ FREE(elements, M_MACTEMP);
+
+ return (error);
+}
+#endif /* MAC_SOCKET */
+
+int
+mac_socket_check_accept(kauth_cred_t cred, struct socket *so)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_accept, cred,
+ (socket_t)so, so->so_label);
+ return (error);
+}
+
+int
+mac_socket_check_accepted(kauth_cred_t cred, struct socket *so)
+{
+ struct sockaddr *sockaddr;
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ if (sock_getaddr((socket_t)so, &sockaddr, 1) != 0) {
+ error = ECONNABORTED;
+ } else {
+ MAC_CHECK(socket_check_accepted, cred,
+ (socket_t)so, so->so_label, sockaddr);
+ sock_freeaddr(sockaddr);
+ }
+ return (error);
+}
+
+int
+mac_socket_check_bind(kauth_cred_t ucred, struct socket *so,
+ struct sockaddr *sockaddr)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_bind, ucred,
+ (socket_t)so, so->so_label, sockaddr);
+ return (error);
+}
+
+int
+mac_socket_check_connect(kauth_cred_t cred, struct socket *so,
+ struct sockaddr *sockaddr)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_connect, cred,
+ (socket_t)so, so->so_label,
+ sockaddr);
+ return (error);
+}
+
+int
+mac_socket_check_create(kauth_cred_t cred, int domain, int type, int protocol)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_create, cred, domain, type, protocol);
+ return (error);
+}
+
+#if CONFIG_MACF_SOCKET && CONFIG_MACF_NET
+int
+mac_socket_check_deliver(struct socket *so, struct mbuf *mbuf)
+{
+ struct label *label;
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ label = mac_mbuf_to_label(mbuf);
+
+ /* Policy must deal with NULL label (unlabeled mbufs) */
+ MAC_CHECK(socket_check_deliver,
+ (socket_t)so, so->so_label, mbuf, label);
+ return (error);
+}
+#else
+int
+mac_socket_check_deliver(__unused struct socket *so, __unused struct mbuf *mbuf)
+{
+ return (0);
+}
+#endif
+
+int
+mac_socket_check_listen(kauth_cred_t cred, struct socket *so)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_listen, cred,
+ (socket_t)so, so->so_label);
+ return (error);
+}
+
+int
+mac_socket_check_receive(kauth_cred_t cred, struct socket *so)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_receive, cred,
+ (socket_t)so, so->so_label);
+ return (error);
+}
+
+int
+mac_socket_check_received(kauth_cred_t cred, struct socket *so, struct sockaddr *saddr)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_received, cred,
+ (socket_t)so, so->so_label, saddr);
+ return (error);
+}
+
+int
+mac_socket_check_send(kauth_cred_t cred, struct socket *so,
+ struct sockaddr *sockaddr)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return 0;
+
+ MAC_CHECK(socket_check_send, cred,
+ (socket_t)so, so->so_label, sockaddr);
+ return (error);
+}
+
+int
+mac_socket_check_setsockopt(kauth_cred_t cred, struct socket *so,
+ struct sockopt *sopt)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return (0);
+
+ MAC_CHECK(socket_check_setsockopt, cred,
+ (socket_t)so, so->so_label, sopt);
+ return (error);
+}
+
+int mac_socket_check_getsockopt(kauth_cred_t cred, struct socket *so,
+ struct sockopt *sopt)
+{
+ int error;
+
+ if (!mac_socket_enforce)
+ return (0);
+
+ MAC_CHECK(socket_check_getsockopt, cred,
+ (socket_t)so, so->so_label, sopt);
+ return (error);
+}
projects / apple / xnu.git / blobdiff