--- /dev/null
+/*
+ * 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, 2000, 2001, 2002 Robert N. M. Watson
+ * Copyright (c) 2001 Ilmar S. Habibulin
+ * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc.
+ *
+ * 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 <string.h>
+#include <sys/param.h>
+#include <sys/ucred.h>
+#include <sys/malloc.h>
+#include <sys/sbuf.h>
+#include <sys/vnode.h>
+#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
+#include <sys/imgact.h>
+
+#include <security/mac_internal.h>
+
+#include <bsd/bsm/audit_kernel.h>
+
+struct label *
+mac_cred_label_alloc(void)
+{
+ struct label *label;
+
+ label = mac_labelzone_alloc(MAC_WAITOK);
+ if (label == NULL)
+ return (NULL);
+ MAC_PERFORM(cred_label_init, label);
+ return (label);
+}
+
+void
+mac_cred_label_init(struct ucred *cred)
+{
+ cred->cr_label = mac_cred_label_alloc();
+}
+
+void
+mac_cred_label_free(struct label *label)
+{
+ MAC_PERFORM(cred_label_destroy, label);
+ mac_labelzone_free(label);
+}
+
+int
+mac_cred_label_externalize_audit(struct proc *p, struct mac *mac)
+{
+ kauth_cred_t cr;
+ int error;
+
+ cr = kauth_cred_proc_ref(p);
+
+ error = MAC_EXTERNALIZE_AUDIT(cred, cr->cr_label,
+ mac->m_string, mac->m_buflen);
+
+ kauth_cred_unref(&cr);
+ return (error);
+}
+
+void
+mac_cred_label_destroy(kauth_cred_t cred)
+{
+
+ mac_cred_label_free(cred->cr_label);
+ cred->cr_label = NULL;
+}
+
+int
+mac_cred_label_externalize(struct label *label, char *elements,
+ char *outbuf, size_t outbuflen, int flags __unused)
+{
+ int error = 0;
+
+ error = MAC_EXTERNALIZE(cred, label, elements, outbuf, outbuflen);
+
+ return (error);
+}
+
+int
+mac_cred_label_internalize(struct label *label, char *string)
+{
+ int error;
+
+ error = MAC_INTERNALIZE(cred, label, string);
+
+ return (error);
+}
+
+/*
+ * By default, fork just adds a reference to the parent
+ * credential. Policies may need to know about this reference
+ * if they are tracking exit calls to know when to free the
+ * label.
+ */
+void
+mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
+{
+ MAC_PERFORM(cred_label_associate_fork, cred, proc);
+}
+
+/*
+ * Initialize MAC label for the first kernel process, from which other
+ * kernel processes and threads are spawned.
+ */
+void
+mac_cred_label_associate_kernel(kauth_cred_t cred)
+{
+
+ MAC_PERFORM(cred_label_associate_kernel, cred);
+}
+
+/*
+ * Initialize MAC label for the first userland process, from which other
+ * userland processes and threads are spawned.
+ */
+void
+mac_cred_label_associate_user(kauth_cred_t cred)
+{
+
+ MAC_PERFORM(cred_label_associate_user, cred);
+}
+
+/*
+ * When a new process is created, its label must be initialized. Generally,
+ * this involves inheritence from the parent process, modulo possible
+ * deltas. This function allows that processing to take place.
+ */
+void
+mac_cred_label_associate(struct ucred *parent_cred, struct ucred *child_cred)
+{
+
+ MAC_PERFORM(cred_label_associate, parent_cred, child_cred);
+}
+
+int
+mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
+{
+ struct user_mac mac;
+ struct label *execlabel;
+ char *buffer;
+ int error;
+ size_t ulen;
+
+ if (mac_p == USER_ADDR_NULL)
+ return (0);
+
+ if (IS_64BIT_PROCESS(current_proc())) {
+ error = copyin(mac_p, &mac, sizeof(mac));
+ } else {
+ struct mac mac32;
+ error = copyin(mac_p, &mac32, sizeof(mac32));
+ mac.m_buflen = mac32.m_buflen;
+ mac.m_string = CAST_USER_ADDR_T(mac32.m_string);
+ }
+ if (error)
+ return (error);
+
+ error = mac_check_structmac_consistent(&mac);
+ if (error)
+ return (error);
+
+ execlabel = mac_cred_label_alloc();
+ MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
+ error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen);
+ if (error)
+ goto out;
+ AUDIT_ARG(mac_string, buffer);
+
+ error = mac_cred_label_internalize(execlabel, buffer);
+out:
+ if (error) {
+ mac_cred_label_free(execlabel);
+ execlabel = NULL;
+ }
+ imgp->ip_execlabelp = execlabel;
+ FREE(buffer, M_MACTEMP);
+ return (error);
+}
+
+/*
+ * When the subject's label changes, it may require revocation of privilege
+ * to mapped objects. This can't be done on-the-fly later with a unified
+ * buffer cache.
+ */
+void
+mac_cred_label_update(kauth_cred_t cred, struct label *newlabel)
+{
+
+ /* force label to be part of "matching" for credential */
+ cred->cr_flags |= CRF_MAC_ENFORCE;
+
+ /* inform the policies of the update */
+ MAC_PERFORM(cred_label_update, cred, newlabel);
+}
+
+int
+mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
+{
+ int error;
+
+ if (!mac_proc_enforce)
+ return (0);
+
+ MAC_CHECK(cred_check_label_update, cred, newlabel);
+
+ return (error);
+}
+
+int
+mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
+{
+ int error;
+
+
+
+ if (!mac_proc_enforce)
+ return (0);
+
+
+
+ MAC_CHECK(cred_check_visible, u1, u2);
+
+
+ return (error);
+}
+
+/*
+ * called with process locked.
+ */
+void mac_proc_set_enforce(proc_t p, int enforce_flags)
+{
+ p->p_mac_enforce |= enforce_flags;
+}
+
+int
+mac_proc_check_debug(proc_t curp, struct proc *proc)
+{
+ kauth_cred_t cred;
+ int error;
+
+
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(curp);
+ MAC_CHECK(proc_check_debug, cred, proc);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+int
+mac_proc_check_fork(proc_t curp)
+{
+ kauth_cred_t cred;
+ int error;
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(curp);
+ MAC_CHECK(proc_check_fork, cred, curp);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+int
+mac_proc_check_get_task_name(struct ucred *cred, struct proc *p)
+{
+ int error;
+
+ MAC_CHECK(proc_check_get_task_name, cred, p);
+
+ return (error);
+}
+
+int
+mac_proc_check_get_task(struct ucred *cred, struct proc *p)
+{
+ int error;
+
+ MAC_CHECK(proc_check_get_task, cred, p);
+
+ return (error);
+}
+
+int
+mac_proc_check_mprotect(proc_t proc,
+ user_addr_t addr, user_size_t size, int prot)
+{
+ kauth_cred_t cred;
+ int error;
+
+ if (!mac_vm_enforce ||
+ !mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(proc);
+ MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+int
+mac_proc_check_sched(proc_t curp, struct proc *proc)
+{
+ kauth_cred_t cred;
+ int error;
+
+
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(curp);
+ MAC_CHECK(proc_check_sched, cred, proc);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+int
+mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
+{
+ kauth_cred_t cred;
+ int error;
+
+
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(curp);
+ MAC_CHECK(proc_check_signal, cred, proc, signum);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+int
+mac_proc_check_wait(proc_t curp, struct proc *proc)
+{
+ kauth_cred_t cred;
+ int error;
+
+
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+ return (0);
+
+ cred = kauth_cred_proc_ref(curp);
+ MAC_CHECK(proc_check_wait, cred, proc);
+ kauth_cred_unref(&cred);
+
+ return (error);
+}
+
+#if CONFIG_LCTX
+/*
+ * Login Context
+ */
+
+int
+mac_proc_check_setlcid (struct proc *p0, struct proc *p,
+ pid_t pid, pid_t lcid)
+{
+ int error;
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
+ return (0);
+
+ MAC_CHECK(proc_check_setlcid, p0, p, pid, lcid);
+ return (error);
+}
+
+int
+mac_proc_check_getlcid (struct proc *p0, struct proc *p, pid_t pid)
+{
+ int error;
+
+ if (!mac_proc_enforce ||
+ !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
+ return (0);
+
+ MAC_CHECK(proc_check_getlcid, p0, p, pid);
+ return (error);
+}
+
+void
+mac_lctx_notify_create (struct proc *p, struct lctx *l)
+{
+ MAC_PERFORM(lctx_notify_create, p, l);
+}
+
+void
+mac_lctx_notify_join (struct proc *p, struct lctx *l)
+{
+ MAC_PERFORM(lctx_notify_join, p, l);
+}
+
+void
+mac_lctx_notify_leave (struct proc *p, struct lctx *l)
+{
+ MAC_PERFORM(lctx_notify_leave, p, l);
+}
+
+struct label *
+mac_lctx_label_alloc(void)
+{
+ struct label *label;
+
+ label = mac_labelzone_alloc(MAC_WAITOK);
+ if (label == NULL)
+ return (NULL);
+ MAC_PERFORM(lctx_label_init, label);
+ return (label);
+}
+
+void
+mac_lctx_label_free(struct label *label)
+{
+
+ MAC_PERFORM(lctx_label_destroy, label);
+ mac_labelzone_free(label);
+}
+
+int
+mac_lctx_label_externalize(struct label *label, char *elements,
+ char *outbuf, size_t outbuflen)
+{
+ int error;
+
+ error = MAC_EXTERNALIZE(lctx, label, elements, outbuf, outbuflen);
+
+ return (error);
+}
+
+int
+mac_lctx_label_internalize(struct label *label, char *string)
+{
+ int error;
+
+ error = MAC_INTERNALIZE(lctx, label, string);
+
+ return (error);
+}
+
+void
+mac_lctx_label_update(struct lctx *l, struct label *newlabel)
+{
+
+ MAC_PERFORM(lctx_label_update, l, newlabel);
+}
+
+int
+mac_lctx_check_label_update(struct lctx *l, struct label *newlabel)
+{
+ int error;
+
+ MAC_CHECK(lctx_check_label_update, l, newlabel);
+
+ return (error);
+}
+#endif /* LCTX */
+
+
+void
+mac_thread_userret(int code, int error, struct thread *thread)
+{
+
+ if (mac_late)
+ MAC_PERFORM(thread_userret, code, error, thread);
+}
projects / apple / xnu.git / blobdiff