/* * 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. * 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 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. * */ #ifndef _SECURITY_MAC_INTERNAL_H_ #define _SECURITY_MAC_INTERNAL_H_ #ifndef PRIVATE #warning "MAC policy is not KPI, see Technical Q&A QA1574, this header will be removed in next version" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * MAC Framework sysctl namespace. */ SYSCTL_DECL(_security); SYSCTL_DECL(_security_mac); extern int mac_late; struct mac_policy_list_element { struct mac_policy_conf *mpc; }; struct mac_policy_list { u_int numloaded; u_int max; u_int maxindex; u_int staticmax; u_int chunks; u_int freehint; struct mac_policy_list_element *entries; }; typedef struct mac_policy_list mac_policy_list_t; /* * Policy that has registered with the framework for a specific * label namespace name. */ struct mac_label_listener { mac_policy_handle_t mll_handle; SLIST_ENTRY(mac_label_listener) mll_list; }; SLIST_HEAD(mac_label_listeners_t, mac_label_listener); /* * Type of list used to manage label namespace names. */ struct mac_label_element { char mle_name[MAC_MAX_LABEL_ELEMENT_NAME]; struct mac_label_listeners_t mle_listeners; SLIST_ENTRY(mac_label_element) mle_list; }; SLIST_HEAD(mac_label_element_list_t, mac_label_element); /* * MAC Framework global variables. */ extern struct mac_label_element_list_t mac_label_element_list; extern struct mac_label_element_list_t mac_static_label_element_list; extern struct mac_policy_list mac_policy_list; /* * global flags to control whether a MACF subsystem is configured * at all in the system. */ extern unsigned int mac_device_enforce; extern unsigned int mac_pipe_enforce; extern unsigned int mac_posixsem_enforce; extern unsigned int mac_posixshm_enforce; extern unsigned int mac_proc_enforce; extern unsigned int mac_socket_enforce; extern unsigned int mac_system_enforce; extern unsigned int mac_sysvmsg_enforce; extern unsigned int mac_sysvsem_enforce; extern unsigned int mac_sysvshm_enforce; extern unsigned int mac_vm_enforce; extern unsigned int mac_vnode_enforce; extern unsigned int mac_label_vnodes; extern unsigned int mac_vnode_label_count; static bool mac_proc_check_enforce(proc_t p); static __inline__ bool mac_proc_check_enforce(proc_t p) { #if CONFIG_MACF // Don't apply policies to the kernel itself. return p != kernproc; #else #pragma unused(p) return false; #endif // CONFIG_MACF } static bool mac_cred_check_enforce(kauth_cred_t cred); static __inline__ bool mac_cred_check_enforce(kauth_cred_t cred) { #if CONFIG_MACF return cred != proc_ucred_unsafe(kernproc); #else #pragma unused(p) return false; #endif // CONFIG_MACF } /* * MAC Framework infrastructure functions. */ int mac_error_select(int error1, int error2); void mac_policy_list_busy(void); int mac_policy_list_conditional_busy(void); void mac_policy_list_unbusy(void); #if KERNEL int mac_check_structmac_consistent(struct user_mac *mac); #else int mac_check_structmac_consistent(struct mac *mac); #endif int mac_cred_label_externalize(struct label *, char *e, char *out, size_t olen, int flags); int mac_vnode_label_externalize(struct label *, char *e, char *out, size_t olen, int flags); int mac_cred_label_internalize(struct label *label, char *string); int mac_vnode_label_internalize(struct label *label, char *string); typedef int (^mac_getter_t)(char *, char *, size_t); typedef int (^mac_setter_t)(char *, size_t); int mac_do_get(struct proc *p, user_addr_t mac_p, mac_getter_t getter); int mac_do_set(struct proc *p, user_addr_t mac_p, mac_setter_t setter); #define MAC_POLICY_ITERATE(...) do { \ struct mac_policy_conf *mpc; \ u_int i; \ \ for (i = 0; i < mac_policy_list.staticmax; i++) { \ mpc = mac_policy_list.entries[i].mpc; \ if (mpc == NULL) \ continue; \ \ __VA_ARGS__ \ } \ if (mac_policy_list_conditional_busy() != 0) { \ for (; i <= mac_policy_list.maxindex; i++) { \ mpc = mac_policy_list.entries[i].mpc; \ if (mpc == NULL) \ continue; \ \ __VA_ARGS__ \ } \ mac_policy_list_unbusy(); \ } \ } while (0) enum mac_iterate_types { MAC_ITERATE_CHECK = 0, // error starts at 0, callbacks can change it MAC_ITERATE_GRANT = 1, // error starts as EPERM, callbacks can clear it MAC_ITERATE_PERFORM = 2, // no result }; /* * MAC_CHECK performs the designated check by walking the policy * module list and checking with each as to how it feels about the * request. Note that it returns its value via 'error' in the scope * of the caller. */ #define MAC_CHECK(check, args...) do { \ error = 0; \ MAC_POLICY_ITERATE({ \ if (mpc->mpc_ops->mpo_ ## check != NULL) { \ DTRACE_MACF3(mac__call__ ## check, void *, mpc, int, error, int, MAC_ITERATE_CHECK); \ int __step_err = mpc->mpc_ops->mpo_ ## check (args); \ DTRACE_MACF2(mac__rslt__ ## check, void *, mpc, int, __step_err); \ error = mac_error_select(__step_err, error); \ } \ }); \ } while (0) /* * MAC_GRANT performs the designated check by walking the policy * module list and checking with each as to how it feels about the * request. Unlike MAC_CHECK, it grants if any policies return '0', * and otherwise returns EPERM. Note that it returns its value via * 'error' in the scope of the caller. */ #define MAC_GRANT(check, args...) do { \ error = EPERM; \ MAC_POLICY_ITERATE({ \ if (mpc->mpc_ops->mpo_ ## check != NULL) { \ DTRACE_MACF3(mac__call__ ## check, void *, mpc, int, error, int, MAC_ITERATE_GRANT); \ int __step_res = mpc->mpc_ops->mpo_ ## check (args); \ if (__step_res == 0) { \ error = 0; \ } \ DTRACE_MACF2(mac__rslt__ ## check, void *, mpc, int, __step_res); \ } \ }); \ } while (0) #define MAC_INTERNALIZE(obj, label, instring) \ mac_internalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_internalize), label, instring) #define MAC_EXTERNALIZE(obj, label, elementlist, outbuf, outbuflen) \ mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize), label, elementlist, outbuf, outbuflen) #define MAC_EXTERNALIZE_AUDIT(obj, label, outbuf, outbuflen) \ mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize_audit), label, "*", outbuf, outbuflen) #define MAC_PERFORM_CALL(operation, mpc) DTRACE_MACF3(mac__call__ ## operation, void *, mpc, int, 0, int, MAC_ITERATE_PERFORM) #define MAC_PERFORM_RSLT(operation, mpc) DTRACE_MACF2(mac__rslt__ ## operation, void *, mpc, int, 0) /* * MAC_PERFORM performs the designated operation by walking the policy * module list and invoking that operation for each policy. */ #define MAC_PERFORM(operation, args...) do { \ MAC_POLICY_ITERATE({ \ if (mpc->mpc_ops->mpo_ ## operation != NULL) { \ MAC_PERFORM_CALL(operation, mpc); \ mpc->mpc_ops->mpo_ ## operation (args); \ MAC_PERFORM_RSLT(operation, mpc); \ } \ }); \ } while (0) # struct __mac_get_pid_args; struct __mac_get_proc_args; struct __mac_set_proc_args; struct __mac_get_lcid_args; struct __mac_get_fd_args; struct __mac_get_file_args; struct __mac_get_link_args; struct __mac_set_fd_args; struct __mac_set_file_args; struct __mac_syscall_args; void mac_policy_addto_labellist(const mac_policy_handle_t, int); void mac_policy_removefrom_labellist(const mac_policy_handle_t); int mac_externalize(size_t mpo_externalize_off, struct label *label, const char *elementlist, char *outbuf, size_t outbuflen); int mac_internalize(size_t mpo_internalize_off, struct label *label, char *elementlist); #endif /* !_SECURITY_MAC_INTERNAL_H_ */