[apple/xnu.git] / security / mac_internal.h

/*
 * 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 <string.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <security/mac.h>
#include <security/mac_framework.h>
#include <security/mac_policy.h>
#include <security/mac_data.h>
#include <sys/sysctl.h>
#include <kern/locks.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/sbuf.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/vnode.h>

/*
 * 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;
	LIST_ENTRY(mac_label_listener)	mll_list;
};

LIST_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;
	LIST_ENTRY(mac_label_element)	mle_list;
};

LIST_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;

#if CONFIG_MACF_NET
extern unsigned int mac_label_mbufs;
#endif

extern unsigned int mac_label_vnodes;

static int mac_proc_check_enforce(proc_t p, int enforce_flags);

static __inline__ int mac_proc_check_enforce(proc_t p, int enforce_flags)
{
#if CONFIG_MACF
#if SECURITY_MAC_CHECK_ENFORCE // 21167099 - only check if we allow write
    return ((p->p_mac_enforce & enforce_flags) != 0);
#else
#pragma unused(p,enforce_flags)
    return 1;
#endif // SECURITY_MAC_CHECK_ENFORCE
#else
#pragma unused(p,enforce_flags)
	return 0;
#endif // CONFIG_MACF
}

static int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags);
static void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags);

static __inline__ int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags)
{
	proc_t proc = vfs_context_proc(ctx);

	if (proc == NULL)
		return 0;

	return (mac_proc_check_enforce(proc, enforce_flags));
}

static __inline__ void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags)
{
#if CONFIG_MACF
	proc_t proc = vfs_context_proc(ctx);

	if (proc == NULL)
		return;

	mac_proc_set_enforce(proc, enforce_flags);
#else
#pragma unused(ctx,enforce_flags)
#endif
}


/*
 * 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);

void           mac_labelzone_init(void);
struct label  *mac_labelzone_alloc(int flags);
void           mac_labelzone_free(struct label *label);

void  mac_label_init(struct label *label);
void  mac_label_destroy(struct label *label);
#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);
#if CONFIG_MACF_SOCKET
int mac_socket_label_externalize(struct label *, char *e, char *out, size_t olen);
#endif /* CONFIG_MACF_SOCKET */
int mac_vnode_label_externalize(struct label *, char *e, char *out, size_t olen, int flags);
int mac_pipe_label_externalize(struct label *label, char *elements,
 char *outbuf, size_t outbuflen);

int mac_cred_label_internalize(struct label *label, char *string);
#if CONFIG_MACF_SOCKET
int mac_socket_label_internalize(struct label *label, char *string);
#endif /* CONFIG_MACF_SOCKET */
int mac_vnode_label_internalize(struct label *label, char *string);
int mac_pipe_label_internalize(struct label *label, char *string);

#if CONFIG_MACF_SOCKET
/* internal socket label manipulation functions */
struct  label *mac_socket_label_alloc(int flags);
void    mac_socket_label_free(struct label *l);
int     mac_socket_label_update(struct ucred *cred, struct socket *so, struct label *l);
#endif /* MAC_SOCKET */

#if CONFIG_MACF_NET
struct label *mac_mbuf_to_label(struct mbuf *m);
#else
#define mac_mbuf_to_label(m) (NULL)
#endif

/*
 * 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 {					\
	struct mac_policy_conf *mpc;					\
	u_int i;                                               		\
									\
	error = 0;							\
	for (i = 0; i < mac_policy_list.staticmax; i++) {		\
		mpc = mac_policy_list.entries[i].mpc;              	\
		if (mpc == NULL)                                	\
			continue;                               	\
									\
		if (mpc->mpc_ops->mpo_ ## check != NULL)		\
			error = mac_error_select(      			\
			    mpc->mpc_ops->mpo_ ## check (args),		\
			    error);					\
	}								\
	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;                               \
                                                                        \
			if (mpc->mpc_ops->mpo_ ## check != NULL)	\
				error = mac_error_select(      		\
				    mpc->mpc_ops->mpo_ ## check (args),	\
				    error);				\
		}							\
		mac_policy_list_unbusy();				\
	}								\
} 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 {					\
	struct mac_policy_conf *mpc;					\
	u_int i;							\
									\
	error = EPERM;							\
	for (i = 0; i < mac_policy_list.staticmax; i++) {		\
		mpc = mac_policy_list.entries[i].mpc;			\
		if (mpc == NULL)					\
			continue;					\
									\
		if (mpc->mpc_ops->mpo_ ## check != NULL) {		\
			if (mpc->mpc_ops->mpo_ ## check (args) == 0)	\
				error = 0;				\
		}							\
	}								\
	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;				\
									\
			if (mpc->mpc_ops->mpo_ ## check != NULL) {	\
				if (mpc->mpc_ops->mpo_ ## check (args)	\
				    == 0)				\
					error = 0;			\
			}						\
		}							\
		mac_policy_list_unbusy();				\
	}								\
} while (0)

/*
 * MAC_BOOLEAN performs the designated boolean composition by walking
 * the module list, invoking each instance of the operation, and
 * combining the results using the passed C operator.  Note that it
 * returns its value via 'result' in the scope of the caller, which
 * should be initialized by the caller in a meaningful way to get
 * a meaningful result.
 */
#define	MAC_BOOLEAN(operation, composition, args...) 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;                               	\
									\
		if (mpc->mpc_ops->mpo_ ## operation != NULL)		\
			result = result composition			\
			    mpc->mpc_ops->mpo_ ## operation		\
			    (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;                               \
                                                                        \
			if (mpc->mpc_ops->mpo_ ## operation != NULL)	\
				result = result composition		\
				    mpc->mpc_ops->mpo_ ## operation	\
				    (args);				\
		}							\
		mac_policy_list_unbusy();				\
	}								\
} 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)

/*
 * 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 {				\
	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;					\
									\
		if (mpc->mpc_ops->mpo_ ## operation != NULL)		\
			mpc->mpc_ops->mpo_ ## operation (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;				\
									\
			if (mpc->mpc_ops->mpo_ ## operation != NULL)	\
				mpc->mpc_ops->mpo_ ## operation (args);	\
		}							\
		mac_policy_list_unbusy();				\
	}								\
} 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_ */
Commit	Line	Data
2d21ac55 A	1	/*
	2	* Copyright (c) 2007 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/*-
	30	* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
	31	* Copyright (c) 2001 Ilmar S. Habibulin
	32	* Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc.
	33	* Copyright (c) 2005 SPARTA, Inc.
	34	* All rights reserved.
	35	*
	36	* This software was developed by Robert Watson and Ilmar Habibulin for the
	37	* TrustedBSD Project.
	38	*
	39	* This software was developed for the FreeBSD Project in part by Network
	40	* Associates Laboratories, the Security Research Division of Network
	41	* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
	42	* as part of the DARPA CHATS research program.
	43	*
	44	* Redistribution and use in source and binary forms, with or without
	45	* modification, are permitted provided that the following conditions
	46	* are met:
	47	* 1. Redistributions of source code must retain the above copyright
	48	* notice, this list of conditions and the following disclaimer.
	49	* 2. Redistributions in binary form must reproduce the above copyright
	50	* notice, this list of conditions and the following disclaimer in the
	51	* documentation and/or other materials provided with the distribution.
	52	*
	53	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	54	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	55	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	56	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	57	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	58	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	59	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	60	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	61	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	62	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	63	* SUCH DAMAGE.
	64	*
65	*/
66
67	#ifndef _SECURITY_MAC_INTERNAL_H_
68	#define _SECURITY_MAC_INTERNAL_H_
69
39236c6e A	70	#ifndef PRIVATE
	71	#warning "MAC policy is not KPI, see Technical Q&A QA1574, this header will be removed in next version"
	72	#endif
	73
2d21ac55 A	74	#include <string.h>
	75	#include <sys/param.h>
	76	#include <sys/queue.h>
	77	#include <security/mac.h>
	78	#include <security/mac_framework.h>
	79	#include <security/mac_policy.h>
	80	#include <security/mac_data.h>
	81	#include <sys/sysctl.h>
2d21ac55 A	82	#include <kern/locks.h>
	83	#include <sys/kernel.h>
	84	#include <sys/lock.h>
	85	#include <sys/malloc.h>
	86	#include <sys/sbuf.h>
	87	#include <sys/proc.h>
	88	#include <sys/systm.h>
	89	#include <sys/socket.h>
	90	#include <sys/socketvar.h>
	91	#include <sys/vnode.h>
	92
	93	/*
	94	* MAC Framework sysctl namespace.
	95	*/
	96
	97	SYSCTL_DECL(_security);
	98	SYSCTL_DECL(_security_mac);
	99
	100	extern int mac_late;
	101
	102	struct mac_policy_list_element {
	103	struct mac_policy_conf *mpc;
	104	};
	105
	106	struct mac_policy_list {
	107	u_int numloaded;
	108	u_int max;
	109	u_int maxindex;
	110	u_int staticmax;
	111	u_int chunks;
	112	u_int freehint;
	113	struct mac_policy_list_element *entries;
	114	};
	115
	116	typedef struct mac_policy_list mac_policy_list_t;
	117
	118
2d21ac55 A	119	/*
	120	* Policy that has registered with the framework for a specific
	121	* label namespace name.
	122	*/
	123	struct mac_label_listener {
	124	mac_policy_handle_t mll_handle;
	125	LIST_ENTRY(mac_label_listener) mll_list;
	126	};
	127
	128	LIST_HEAD(mac_label_listeners_t, mac_label_listener);
	129
	130	/*
	131	* Type of list used to manage label namespace names.
	132	*/
	133	struct mac_label_element {
	134	char mle_name[MAC_MAX_LABEL_ELEMENT_NAME];
	135	struct mac_label_listeners_t mle_listeners;
	136	LIST_ENTRY(mac_label_element) mle_list;
	137	};
	138
	139	LIST_HEAD(mac_label_element_list_t, mac_label_element);
	140
2d21ac55 A	141	/*
	142	* MAC Framework global variables.
	143	*/
	144
	145	extern struct mac_label_element_list_t mac_label_element_list;
	146	extern struct mac_label_element_list_t mac_static_label_element_list;
2d21ac55 A	147
	148	extern struct mac_policy_list mac_policy_list;
	149
	150	/*
	151	* global flags to control whether a MACF subsystem is configured
	152	* at all in the system.
	153	*/
	154	extern unsigned int mac_device_enforce;
2d21ac55 A	155	extern unsigned int mac_pipe_enforce;
	156	extern unsigned int mac_posixsem_enforce;
	157	extern unsigned int mac_posixshm_enforce;
	158	extern unsigned int mac_proc_enforce;
	159	extern unsigned int mac_socket_enforce;
	160	extern unsigned int mac_system_enforce;
	161	extern unsigned int mac_sysvmsg_enforce;
	162	extern unsigned int mac_sysvsem_enforce;
	163	extern unsigned int mac_sysvshm_enforce;
	164	extern unsigned int mac_vm_enforce;
	165	extern unsigned int mac_vnode_enforce;
	166
2d21ac55 A	167	#if CONFIG_MACF_NET
	168	extern unsigned int mac_label_mbufs;
	169	#endif
	170
b0d623f7 A	171	extern unsigned int mac_label_vnodes;
b0d623f7 A	172
39236c6e	173	static int mac_proc_check_enforce(proc_t p, int enforce_flags);
2d21ac55 A	174
	175	static __inline__ int mac_proc_check_enforce(proc_t p, int enforce_flags)
	176	{
	177	#if CONFIG_MACF
3e170ce0 A	178	#if SECURITY_MAC_CHECK_ENFORCE // 21167099 - only check if we allow write
	179	return ((p->p_mac_enforce & enforce_flags) != 0);
	180	#else
	181	#pragma unused(p,enforce_flags)
	182	return 1;
	183	#endif // SECURITY_MAC_CHECK_ENFORCE
2d21ac55	184	#else
39236c6e	185	#pragma unused(p,enforce_flags)
2d21ac55	186	return 0;
3e170ce0	187	#endif // CONFIG_MACF
2d21ac55 A	188	}
	189
	190	static int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags);
	191	static void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags);
	192
	193	static __inline__ int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags)
	194	{
	195	proc_t proc = vfs_context_proc(ctx);
	196
	197	if (proc == NULL)
	198	return 0;
	199
	200	return (mac_proc_check_enforce(proc, enforce_flags));
	201	}
	202
	203	static __inline__ void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags)
	204	{
39236c6e	205	#if CONFIG_MACF
2d21ac55 A	206	proc_t proc = vfs_context_proc(ctx);
	207
	208	if (proc == NULL)
	209	return;
	210
	211	mac_proc_set_enforce(proc, enforce_flags);
39236c6e A	212	#else
	213	#pragma unused(ctx,enforce_flags)
	214	#endif
2d21ac55 A	215	}
	216
	217
	218	/*
	219	* MAC Framework infrastructure functions.
	220	*/
	221
	222	int mac_error_select(int error1, int error2);
	223
	224	void mac_policy_list_busy(void);
	225	int mac_policy_list_conditional_busy(void);
	226	void mac_policy_list_unbusy(void);
	227
	228	void mac_labelzone_init(void);
	229	struct label *mac_labelzone_alloc(int flags);
	230	void mac_labelzone_free(struct label *label);
	231
	232	void mac_label_init(struct label *label);
	233	void mac_label_destroy(struct label *label);
	234	#if KERNEL
	235	int mac_check_structmac_consistent(struct user_mac *mac);
	236	#else
	237	int mac_check_structmac_consistent(struct mac *mac);
	238	#endif
	239
	240	int mac_cred_label_externalize(struct label , char e, char *out, size_t olen, int flags);
2d21ac55 A	241	#if CONFIG_MACF_SOCKET
	242	int mac_socket_label_externalize(struct label , char e, char *out, size_t olen);
	243	#endif /* CONFIG_MACF_SOCKET */
	244	int mac_vnode_label_externalize(struct label , char e, char *out, size_t olen, int flags);
	245	int mac_pipe_label_externalize(struct label label, char elements,
	246	char *outbuf, size_t outbuflen);
	247
	248	int mac_cred_label_internalize(struct label label, char string);
2d21ac55 A	249	#if CONFIG_MACF_SOCKET
	250	int mac_socket_label_internalize(struct label label, char string);
	251	#endif /* CONFIG_MACF_SOCKET */
	252	int mac_vnode_label_internalize(struct label label, char string);
	253	int mac_pipe_label_internalize(struct label label, char string);
	254
	255	#if CONFIG_MACF_SOCKET
	256	/* internal socket label manipulation functions */
	257	struct label *mac_socket_label_alloc(int flags);
	258	void mac_socket_label_free(struct label *l);
	259	int mac_socket_label_update(struct ucred cred, struct socket so, struct label *l);
	260	#endif /* MAC_SOCKET */
	261
	262	#if CONFIG_MACF_NET
	263	struct label mac_mbuf_to_label(struct mbuf m);
	264	#else
	265	#define mac_mbuf_to_label(m) (NULL)
	266	#endif
	267
	268	/*
	269	* MAC_CHECK performs the designated check by walking the policy
	270	* module list and checking with each as to how it feels about the
	271	* request. Note that it returns its value via 'error' in the scope
	272	* of the caller.
	273	*/
	274	#define MAC_CHECK(check, args...) do { \
	275	struct mac_policy_conf *mpc; \
	276	u_int i; \
	277	\
	278	error = 0; \
	279	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	280	mpc = mac_policy_list.entries[i].mpc; \
	281	if (mpc == NULL) \
	282	continue; \
	283	\
	284	if (mpc->mpc_ops->mpo_ ## check != NULL) \
	285	error = mac_error_select( \
	286	mpc->mpc_ops->mpo_ ## check (args), \
	287	error); \
	288	} \
	289	if (mac_policy_list_conditional_busy() != 0) { \
	290	for (; i <= mac_policy_list.maxindex; i++) { \
	291	mpc = mac_policy_list.entries[i].mpc; \
	292	if (mpc == NULL) \
	293	continue; \
	294	\
	295	if (mpc->mpc_ops->mpo_ ## check != NULL) \
	296	error = mac_error_select( \
	297	mpc->mpc_ops->mpo_ ## check (args), \
	298	error); \
	299	} \
	300	mac_policy_list_unbusy(); \
	301	} \
	302	} while (0)
	303
6d2010ae A	304	/*
	305	* MAC_GRANT performs the designated check by walking the policy
	306	* module list and checking with each as to how it feels about the
	307	* request. Unlike MAC_CHECK, it grants if any policies return '0',
	308	* and otherwise returns EPERM. Note that it returns its value via
	309	* 'error' in the scope of the caller.
	310	*/
	311	#define MAC_GRANT(check, args...) do { \
	312	struct mac_policy_conf *mpc; \
	313	u_int i; \
	314	\
	315	error = EPERM; \
	316	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	317	mpc = mac_policy_list.entries[i].mpc; \
	318	if (mpc == NULL) \
	319	continue; \
	320	\
	321	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	322	if (mpc->mpc_ops->mpo_ ## check (args) == 0) \
	323	error = 0; \
	324	} \
	325	} \
	326	if (mac_policy_list_conditional_busy() != 0) { \
	327	for (; i <= mac_policy_list.maxindex; i++) { \
	328	mpc = mac_policy_list.entries[i].mpc; \
	329	if (mpc == NULL) \
	330	continue; \
	331	\
	332	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	333	if (mpc->mpc_ops->mpo_ ## check (args) \
	334	== 0) \
	335	error = 0; \
	336	} \
	337	} \
	338	mac_policy_list_unbusy(); \
	339	} \
	340	} while (0)
	341
2d21ac55 A	342	/*
	343	* MAC_BOOLEAN performs the designated boolean composition by walking
	344	* the module list, invoking each instance of the operation, and
	345	* combining the results using the passed C operator. Note that it
	346	* returns its value via 'result' in the scope of the caller, which
	347	* should be initialized by the caller in a meaningful way to get
	348	* a meaningful result.
	349	*/
	350	#define MAC_BOOLEAN(operation, composition, args...) do { \
	351	struct mac_policy_conf *mpc; \
	352	u_int i; \
	353	\
	354	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	355	mpc = mac_policy_list.entries[i].mpc; \
	356	if (mpc == NULL) \
	357	continue; \
	358	\
	359	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	360	result = result composition \
	361	mpc->mpc_ops->mpo_ ## operation \
	362	(args); \
	363	} \
	364	if (mac_policy_list_conditional_busy() != 0) { \
	365	for (; i <= mac_policy_list.maxindex; i++) { \
	366	mpc = mac_policy_list.entries[i].mpc; \
	367	if (mpc == NULL) \
	368	continue; \
	369	\
	370	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	371	result = result composition \
	372	mpc->mpc_ops->mpo_ ## operation \
	373	(args); \
	374	} \
	375	mac_policy_list_unbusy(); \
	376	} \
	377	} while (0)
	378
	379	#define MAC_INTERNALIZE(obj, label, instring) \
	380	mac_internalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_internalize), label, instring)
	381
	382	#define MAC_EXTERNALIZE(obj, label, elementlist, outbuf, outbuflen) \
	383	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize), label, elementlist, outbuf, outbuflen)
	384
	385	#define MAC_EXTERNALIZE_AUDIT(obj, label, outbuf, outbuflen) \
	386	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize_audit), label, "*", outbuf, outbuflen)
	387
	388	/*
	389	* MAC_PERFORM performs the designated operation by walking the policy
	390	* module list and invoking that operation for each policy.
	391	*/
	392	#define MAC_PERFORM(operation, args...) do { \
	393	struct mac_policy_conf *mpc; \
	394	u_int i; \
	395	\
	396	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	397	mpc = mac_policy_list.entries[i].mpc; \
	398	if (mpc == NULL) \
	399	continue; \
	400	\
	401	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	402	mpc->mpc_ops->mpo_ ## operation (args); \
	403	} \
	404	if (mac_policy_list_conditional_busy() != 0) { \
	405	for (; i <= mac_policy_list.maxindex; i++) { \
406	mpc = mac_policy_list.entries[i].mpc; \
407	if (mpc == NULL) \
408	continue; \
409	\
410	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
411	mpc->mpc_ops->mpo_ ## operation (args); \
412	} \
413	mac_policy_list_unbusy(); \
414	} \
415	} while (0)
416
417	struct __mac_get_pid_args;
418	struct __mac_get_proc_args;
419	struct __mac_set_proc_args;
420	struct __mac_get_lcid_args;
2d21ac55 A	421	struct __mac_get_fd_args;
	422	struct __mac_get_file_args;
	423	struct __mac_get_link_args;
	424	struct __mac_set_fd_args;
	425	struct __mac_set_file_args;
	426	struct __mac_syscall_args;
	427
	428	void mac_policy_addto_labellist(const mac_policy_handle_t, int);
	429	void mac_policy_removefrom_labellist(const mac_policy_handle_t);
	430
	431	int mac_externalize(size_t mpo_externalize_off, struct label *label,
	432	const char elementlist, char outbuf, size_t outbuflen);
	433	int mac_internalize(size_t mpo_internalize_off, struct label *label,
	434	char *elementlist);
	435	#endif /* !_SECURITY_MAC_INTERNAL_H_ */