/*
- * Copyright (c) 2007-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2007-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
SYSCTL_NODE(_security, OID_AUTO, mac, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
"TrustedBSD MAC policy controls");
-#if DEBUG
-#define SECURITY_MAC_CTLFLAGS CTLFLAG_RW | CTLFLAG_LOCKED
-#else
-#define SECURITY_MAC_CTLFLAGS CTLFLAG_RD | CTLFLAG_LOCKED
-#endif
-
/*
* Declare that the kernel provides MAC support, version 1. This permits
* modules to refuse to be loaded if the necessary support isn't present,
struct mac_label_element_list_t mac_label_element_list;
struct mac_label_element_list_t mac_static_label_element_list;
-/*
- * Journal of label operations that occur before policies are loaded.
- */
-struct mac_label_journal_list_t mac_label_journal_list;
-
-int
-mac_label_journal_add (struct label *l, int type)
-{
- struct mac_label_journal *mlj;
-
- if (mac_label_journal_find(l))
- return (0);
-
- MALLOC(mlj, struct mac_label_journal *,
- sizeof(struct mac_label_journal), M_MACTEMP, M_WAITOK);
- mlj->l = l;
- mlj->type = type;
- TAILQ_INSERT_TAIL(&mac_label_journal_list, mlj, link);
-
- return (0);
-}
-
-int
-mac_label_journal_remove (struct label *l)
-{
- struct mac_label_journal *mlj;
-
- mlj = mac_label_journal_find(l);
- if (mlj == NULL)
- return (-1);
-
- TAILQ_REMOVE(&mac_label_journal_list, mlj, link);
- FREE(mlj, M_MACTEMP);
- return (0);
-}
-
-struct mac_label_journal *
-mac_label_journal_find (struct label *l)
-{
- struct mac_label_journal *mlj;
-
- TAILQ_FOREACH(mlj, &mac_label_journal_list, link) {
- if (l == mlj->l)
- return (mlj);
- }
-
- return (NULL);
-}
-
-int
-mac_label_journal (struct label *l, int op, ...)
-{
- struct mac_label_journal *mlj;
- va_list ap;
-
- mlj = mac_label_journal_find(l);
- if (mlj == NULL) {
- printf("%s(): Label not in list!\n", __func__);
- return (-1);
- }
-
- if (op == MLJ_PORT_OP_UPDATE) {
- va_start(ap, op);
- mlj->kotype = va_arg(ap, int);
- va_end(ap);
- }
-
- mlj->ops |= op;
- return (0);
-}
-
-/*
- * The assumption during replay is that the system is totally
- * serialized and no additional tasks/ports will be created.
- */
-void
-mac_label_journal_replay (void)
-{
- struct mac_label_journal *mlj;
-
- TAILQ_FOREACH(mlj, &mac_label_journal_list, link) {
- switch (mlj->type) {
- case MLJ_TYPE_PORT:
- if (mlj->ops & MLJ_PORT_OP_INIT)
- MAC_PERFORM(port_label_init, mlj->l);
- if (mlj->ops & MLJ_PORT_OP_CREATE_K)
- MAC_PERFORM(port_label_associate_kernel, mlj->l, 0);
- if (mlj->ops & MLJ_PORT_OP_UPDATE)
- MAC_PERFORM(port_label_update_kobject, mlj->l,
- mlj->kotype);
- break;
- case MLJ_TYPE_TASK:
- if (mlj->ops & MLJ_TASK_OP_INIT)
- MAC_PERFORM(task_label_init, mlj->l);
-#if 0
- /* Not enough context to replay. */
- if (mlj->ops & MLJ_TASK_OP_CREATE_K)
- ;
-#endif
- break;
- default:
- break;
- }
- }
-
- /* Free list */
- while (!TAILQ_EMPTY(&mac_label_journal_list)) {
- mlj = TAILQ_FIRST(&mac_label_journal_list);
- TAILQ_REMOVE(&mac_label_journal_list, mlj, link);
- FREE(mlj, M_MACTEMP);
- }
- return;
-}
-
static __inline void
mac_policy_grab_exclusive(void)
{
}
}
-static __inline void
-mac_policy_assert_exclusive(void)
-{
- lck_mtx_assert(mac_policy_mtx, LCK_MTX_ASSERT_OWNED);
- KASSERT(mac_policy_busy == 0,
- ("mac_policy_assert_exclusive(): not exclusive"));
-}
-
static __inline void
mac_policy_release_exclusive(void)
{
mac_policy_list.chunks = 1;
mac_policy_list.entries = kalloc(sizeof(struct mac_policy_list_element) * MAC_POLICY_LIST_CHUNKSIZE);
+
bzero(mac_policy_list.entries, sizeof(struct mac_policy_list_element) * MAC_POLICY_LIST_CHUNKSIZE);
LIST_INIT(&mac_label_element_list);
LIST_INIT(&mac_static_label_element_list);
- TAILQ_INIT(&mac_label_journal_list);
mac_lck_grp_attr = lck_grp_attr_alloc_init();
lck_grp_attr_setstat(mac_lck_grp_attr);
load_security_extensions_function();
}
mac_late = 1;
-#if CONFIG_MACF_MACH
- mac_label_journal_replay();
-#endif
}
/*
/* implicit: label->l_flags &= ~MAC_FLAG_INITIALIZED; */
}
-int
-mac_port_check_service (struct label *subj, struct label *obj,
- const char *s, const char *p)
-{
- int error;
-
- MAC_CHECK(port_check_service, subj, obj, s, p);
- return (error);
-}
-
-int
-mac_port_label_compute(struct label *subj, struct label *obj,
- const char *s, struct label *out)
-{
- int error;
-
- MAC_CHECK(port_label_compute, subj, obj, s, out);
- return error;
-}
-
int
mac_check_structmac_consistent(struct user_mac *mac)
{
int
__mac_set_proc(proc_t p, struct __mac_set_proc_args *uap, int *ret __unused)
{
- kauth_cred_t newcred;
struct label *intlabel;
struct user_mac mac;
char *buffer;
if (error)
goto out;
- newcred = kauth_cred_proc_ref(p);
- mac_task_label_update_cred(newcred, p->task);
-
-#if 0
- if (mac_vm_enforce) {
- mutex_lock(Giant); /* XXX FUNNEL? */
- mac_cred_mmapped_drop_perms(p, newcred);
- mutex_unlock(Giant); /* XXX FUNNEL? */
- }
-#endif
-
- kauth_cred_unref(&newcred);
out:
mac_cred_label_free(intlabel);
return (error);
}
-#if CONFIG_LCTX
-/*
- * __mac_get_lcid:
- * Get login context ID. A login context associates a BSD process
- * with an instance of a user. For more information see getlcid(2) man page.
- *
- * Parameters: p Process requesting the get
- * uap User argument descriptor (see below)
- * ret (ignored)
- *
- * Indirect: uap->lcid login context ID to search
- * uap->mac_p.m_buflen MAC info buffer size
- * uap->mac_p.m_string MAC info user address
- *
- * Returns: 0 Success
- * !0 Not success
- */
-int
-__mac_get_lcid(proc_t p, struct __mac_get_lcid_args *uap, int *ret __unused)
-{
- char *elements, *buffer;
- struct user_mac mac;
- struct lctx *l;
- int error;
- size_t ulen;
-
- AUDIT_ARG(value32, uap->lcid);
- if (IS_64BIT_PROCESS(p)) {
- struct user64_mac mac64;
- error = copyin(uap->mac_p, &mac64, sizeof(mac64));
- mac.m_buflen = mac64.m_buflen;
- mac.m_string = mac64.m_string;
- } else {
- struct user32_mac mac32;
- error = copyin(uap->mac_p, &mac32, sizeof(mac32));
- mac.m_buflen = mac32.m_buflen;
- mac.m_string = mac32.m_string;
- }
-
- if (error)
- return (error);
-
- error = mac_check_structmac_consistent(&mac);
- if (error)
- return (error);
-
- l = lcfind(uap->lcid);
- if (l == NULL)
- return (ESRCH);
-
- MALLOC(elements, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
- error = copyinstr(mac.m_string, elements, mac.m_buflen, &ulen);
- if (error) {
- LCTX_UNLOCK(l);
- FREE(elements, M_MACTEMP);
- return (error);
- }
- AUDIT_ARG(mac_string, elements);
- MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
- error = mac_lctx_label_externalize(l->lc_label, elements,
- buffer, mac.m_buflen);
- if (error == 0)
- error = copyout(buffer, mac.m_string, strlen(buffer)+1);
-
- LCTX_UNLOCK(l);
- FREE(buffer, M_MACTEMP);
- FREE(elements, M_MACTEMP);
- return (error);
-}
-
-/*
- * __mac_get_lctx:
- * Get login context label. A login context associates a BSD process
- * associated with an instance of a user.
- *
- * Parameters: p Process requesting the get
- * uap User argument descriptor (see below)
- * ret (ignored)
- *
- * Indirect: uap->lcid login context ID to search
- * uap->mac_p MAC info
- *
- * Returns: 0 Success
- * !0 Not success
- *
- */
-int
-__mac_get_lctx(proc_t p, struct __mac_get_lctx_args *uap, int *ret __unused)
-{
- char *elements, *buffer;
- struct user_mac mac;
- int error;
- size_t ulen;
-
- if (IS_64BIT_PROCESS(p)) {
- struct user64_mac mac64;
- error = copyin(uap->mac_p, &mac64, sizeof(mac64));
- mac.m_buflen = mac64.m_buflen;
- mac.m_string = mac64.m_string;
- } else {
- struct user32_mac mac32;
- error = copyin(uap->mac_p, &mac32, sizeof(mac32));
- mac.m_buflen = mac32.m_buflen;
- mac.m_string = mac32.m_string;
- }
-
- if (error)
- return (error);
-
- error = mac_check_structmac_consistent(&mac);
- if (error)
- return (error);
-
- MALLOC(elements, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
- error = copyinstr(mac.m_string, elements, mac.m_buflen, &ulen);
- if (error) {
- FREE(elements, M_MACTEMP);
- return (error);
- }
- AUDIT_ARG(mac_string, elements);
- MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
-
- proc_lock(p);
- if (p->p_lctx == NULL) {
- proc_unlock(p);
- error = ENOENT;
- goto out;
- }
-
- error = mac_lctx_label_externalize(p->p_lctx->lc_label,
- elements, buffer, mac.m_buflen);
- proc_unlock(p);
- if (error == 0)
- error = copyout(buffer, mac.m_string, strlen(buffer)+1);
-
-out:
- FREE(buffer, M_MACTEMP);
- FREE(elements, M_MACTEMP);
- return (error);
-}
-
-int
-__mac_set_lctx(proc_t p, struct __mac_set_lctx_args *uap, int *ret __unused)
-{
- struct user_mac mac;
- struct label *intlabel;
- char *buffer;
- int error;
- size_t ulen;
-
- if (IS_64BIT_PROCESS(p)) {
- struct user64_mac mac64;
- error = copyin(uap->mac_p, &mac64, sizeof(mac64));
- mac.m_buflen = mac64.m_buflen;
- mac.m_string = mac64.m_string;
- } else {
- struct user32_mac mac32;
- error = copyin(uap->mac_p, &mac32, sizeof(mac32));
- mac.m_buflen = mac32.m_buflen;
- mac.m_string = mac32.m_string;
- }
- if (error)
- return (error);
-
- error = mac_check_structmac_consistent(&mac);
- if (error)
- return (error);
-
- MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
- error = copyinstr(mac.m_string, buffer, mac.m_buflen, &ulen);
- if (error) {
- FREE(buffer, M_MACTEMP);
- return (error);
- }
- AUDIT_ARG(mac_string, buffer);
-
- intlabel = mac_lctx_label_alloc();
- error = mac_lctx_label_internalize(intlabel, buffer);
- FREE(buffer, M_MACTEMP);
- if (error)
- goto out;
-
- proc_lock(p);
- if (p->p_lctx == NULL) {
- proc_unlock(p);
- error = ENOENT;
- goto out;
- }
-
- error = mac_lctx_check_label_update(p->p_lctx, intlabel);
- if (error) {
- proc_unlock(p);
- goto out;
- }
- mac_lctx_label_update(p->p_lctx, intlabel);
- proc_unlock(p);
-out:
- mac_lctx_label_free(intlabel);
- return (error);
-}
-
-#else /* LCTX */
-
-int
-__mac_get_lcid(proc_t p __unused, struct __mac_get_lcid_args *uap __unused, int *ret __unused)
-{
-
- return (ENOSYS);
-}
-
-int
-__mac_get_lctx(proc_t p __unused, struct __mac_get_lctx_args *uap __unused, int *ret __unused)
-{
-
- return (ENOSYS);
-}
-
-int
-__mac_set_lctx(proc_t p __unused, struct __mac_set_lctx_args *uap __unused, int *ret __unused)
-{
-
- return (ENOSYS);
-}
-#endif /* !LCTX */
-
int
__mac_get_fd(proc_t p, struct __mac_get_fd_args *uap, int *ret __unused)
{
case DTYPE_PIPE:
case DTYPE_KQUEUE:
case DTYPE_FSEVENTS:
+ case DTYPE_ATALK:
+ case DTYPE_NETPOLICY:
default:
error = ENOSYS; // only sockets/vnodes so far
break;
case DTYPE_PIPE:
case DTYPE_KQUEUE:
case DTYPE_FSEVENTS:
+ case DTYPE_ATALK:
+ case DTYPE_NETPOLICY:
default:
error = ENOSYS; // only sockets/vnodes so far
break;
mac_set_filelink(proc_t p, user_addr_t mac_p, user_addr_t path_p,
int follow)
{
- register struct vnode *vp;
+ struct vnode *vp;
struct vfs_context *ctx = vfs_context_current();
struct label *intlabel;
struct nameidata nd;
return (error);
}
mp = nd.ni_vp->v_mount;
+ vnode_put(nd.ni_vp);
nameidone(&nd);
return mac_mount_label_get(mp, uap->mac_p);
return (ENOENT);
}
-intptr_t mac_label_get(struct label *l __unused, int slot __unused)
+int
+mac_file_setxattr(struct fileglob *fg __unused, const char *name __unused, char *buf __unused, size_t len __unused)
{
- return 0;
+
+ return (ENOENT);
}
-void mac_label_set(struct label *l __unused, int slot __unused, intptr_t v __unused)
+int
+mac_file_getxattr(struct fileglob *fg __unused, const char *name __unused,
+ char *buf __unused, size_t len __unused, size_t *attrlen __unused)
{
- return;
+
+ return (ENOENT);
+}
+
+int
+mac_file_removexattr(struct fileglob *fg __unused, const char *name __unused)
+{
+
+ return (ENOENT);
}
-struct label *mac_thread_get_threadlabel(struct thread *thread __unused)
+intptr_t mac_label_get(struct label *l __unused, int slot __unused)
{
- return NULL;
+ return 0;
}
-struct label *mac_thread_get_uthreadlabel(struct uthread *uthread __unused)
+void mac_label_set(struct label *l __unused, int slot __unused, intptr_t v __unused)
{
- return NULL;
+ return;
}
void mac_proc_set_enforce(proc_t p, int enforce_flags);
void mac_proc_set_enforce(proc_t p __unused, int enforce_flags __unused)
{
- return;
+ return;
}
int mac_iokit_check_hid_control(kauth_cred_t cred __unused);
return 0;
}
+
+int mac_iokit_check_nvram_delete(kauth_cred_t cred __unused, const char *name __unused);
+int mac_iokit_check_nvram_delete(kauth_cred_t cred __unused, const char *name __unused)
+{
+ return 0;
+}
+
+int mac_iokit_check_nvram_get(kauth_cred_t cred __unused, const char *name __unused);
+int mac_iokit_check_nvram_get(kauth_cred_t cred __unused, const char *name __unused)
+{
+ return 0;
+}
+
+int mac_iokit_check_nvram_set(kauth_cred_t cred __unused, const char *name __unused, io_object_t value __unused);
+int mac_iokit_check_nvram_set(kauth_cred_t cred __unused, const char *name __unused, io_object_t value __unused)
+{
+ return 0;
+}
+
#endif /* !MAC */
projects / apple / xnu.git / blobdiff