[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_

#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/wait_queue.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);

/*
 * Journal operations
 */

#define	MLJ_TYPE_PORT		1
#define	MLJ_TYPE_TASK		2

#define	MLJ_PORT_OP_INIT	0x0001
#define	MLJ_PORT_OP_CREATE_K	0x0002
#define	MLJ_PORT_OP_CREATE	0x0004
#define	MLJ_PORT_OP_UPDATE	0x0008

#define	MLJ_TASK_OP_INIT	0x0001
#define	MLJ_TASK_OP_CREATE_K	0x0002

struct mac_label_journal {
	struct label *l;
	int type;
	int ops;

	int kotype;	/* Kernel Port */

	TAILQ_ENTRY(mac_label_journal) link;
};
TAILQ_HEAD(mac_label_journal_list_t, mac_label_journal);

int	mac_label_journal_add	(struct label *, int);
int	mac_label_journal_remove(struct label *);
struct mac_label_journal *
	mac_label_journal_find	(struct label *);
int	mac_label_journal	(struct label *, int, ...);
void	mac_label_journal_replay(void);


/*
 * 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_label_journal_list_t mac_label_journal_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_flag);

static __inline__ int mac_proc_check_enforce(proc_t p, int enforce_flags)
{
#if CONFIG_MACF
	return ((p->p_mac_enforce & enforce_flags) != 0);
#else
	return 0;
#endif
}

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)
{
	proc_t proc = vfs_context_proc(ctx);

	if (proc == NULL)
		return;

	mac_proc_set_enforce(proc, enforce_flags);
}


/*
 * 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);
int mac_lctx_label_externalize(struct label *, char *e, char *out, size_t olen);
#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);
int mac_lctx_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_lctx_args;
struct __mac_set_lctx_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
70	#include <string.h>
71	#include <sys/param.h>
72	#include <sys/queue.h>
73	#include <security/mac.h>
74	#include <security/mac_framework.h>
75	#include <security/mac_policy.h>
76	#include <security/mac_data.h>
77	#include <sys/sysctl.h>
78	#include <kern/wait_queue.h>
79	#include <kern/locks.h>
80	#include <sys/kernel.h>
81	#include <sys/lock.h>
82	#include <sys/malloc.h>
83	#include <sys/sbuf.h>
84	#include <sys/proc.h>
85	#include <sys/systm.h>
86	#include <sys/socket.h>
87	#include <sys/socketvar.h>
88	#include <sys/vnode.h>
89
90	/*
91	* MAC Framework sysctl namespace.
92	*/
93
94	SYSCTL_DECL(_security);
95	SYSCTL_DECL(_security_mac);
96
97	extern int mac_late;
98
99	struct mac_policy_list_element {
100	struct mac_policy_conf *mpc;
101	};
102
103	struct mac_policy_list {
104	u_int numloaded;
105	u_int max;
106	u_int maxindex;
107	u_int staticmax;
108	u_int chunks;
109	u_int freehint;
110	struct mac_policy_list_element *entries;
111	};
112
113	typedef struct mac_policy_list mac_policy_list_t;
114
115
2d21ac55 A	116	/*
	117	* Policy that has registered with the framework for a specific
	118	* label namespace name.
	119	*/
	120	struct mac_label_listener {
	121	mac_policy_handle_t mll_handle;
	122	LIST_ENTRY(mac_label_listener) mll_list;
	123	};
	124
	125	LIST_HEAD(mac_label_listeners_t, mac_label_listener);
	126
	127	/*
	128	* Type of list used to manage label namespace names.
	129	*/
	130	struct mac_label_element {
	131	char mle_name[MAC_MAX_LABEL_ELEMENT_NAME];
	132	struct mac_label_listeners_t mle_listeners;
	133	LIST_ENTRY(mac_label_element) mle_list;
	134	};
	135
	136	LIST_HEAD(mac_label_element_list_t, mac_label_element);
	137
	138	/*
	139	* Journal operations
	140	*/
	141
	142	#define MLJ_TYPE_PORT 1
	143	#define MLJ_TYPE_TASK 2
	144
	145	#define MLJ_PORT_OP_INIT 0x0001
	146	#define MLJ_PORT_OP_CREATE_K 0x0002
	147	#define MLJ_PORT_OP_CREATE 0x0004
	148	#define MLJ_PORT_OP_UPDATE 0x0008
	149
	150	#define MLJ_TASK_OP_INIT 0x0001
	151	#define MLJ_TASK_OP_CREATE_K 0x0002
	152
	153	struct mac_label_journal {
	154	struct label *l;
	155	int type;
	156	int ops;
	157
	158	int kotype; /* Kernel Port */
	159
	160	TAILQ_ENTRY(mac_label_journal) link;
	161	};
	162	TAILQ_HEAD(mac_label_journal_list_t, mac_label_journal);
	163
	164	int mac_label_journal_add (struct label *, int);
	165	int mac_label_journal_remove(struct label *);
	166	struct mac_label_journal *
	167	mac_label_journal_find (struct label *);
	168	int mac_label_journal (struct label *, int, ...);
	169	void mac_label_journal_replay(void);
	170
	171
	172	/*
	173	* MAC Framework global variables.
	174	*/
	175
	176	extern struct mac_label_element_list_t mac_label_element_list;
	177	extern struct mac_label_element_list_t mac_static_label_element_list;
	178	extern struct mac_label_journal_list_t mac_label_journal_list;
	179
180	extern struct mac_policy_list mac_policy_list;
181
182	/*
183	* global flags to control whether a MACF subsystem is configured
184	* at all in the system.
185	*/
186	extern unsigned int mac_device_enforce;
2d21ac55 A	187	extern unsigned int mac_pipe_enforce;
	188	extern unsigned int mac_posixsem_enforce;
	189	extern unsigned int mac_posixshm_enforce;
	190	extern unsigned int mac_proc_enforce;
	191	extern unsigned int mac_socket_enforce;
	192	extern unsigned int mac_system_enforce;
	193	extern unsigned int mac_sysvmsg_enforce;
	194	extern unsigned int mac_sysvsem_enforce;
	195	extern unsigned int mac_sysvshm_enforce;
	196	extern unsigned int mac_vm_enforce;
	197	extern unsigned int mac_vnode_enforce;
	198
2d21ac55 A	199	#if CONFIG_MACF_NET
	200	extern unsigned int mac_label_mbufs;
	201	#endif
	202
b0d623f7 A	203	extern unsigned int mac_label_vnodes;
b0d623f7 A	204
2d21ac55 A	205	static int mac_proc_check_enforce(proc_t p, int enforce_flag);
	206
	207	static __inline__ int mac_proc_check_enforce(proc_t p, int enforce_flags)
	208	{
	209	#if CONFIG_MACF
	210	return ((p->p_mac_enforce & enforce_flags) != 0);
	211	#else
	212	return 0;
	213	#endif
	214	}
	215
	216	static int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags);
	217	static void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags);
	218
	219	static __inline__ int mac_context_check_enforce(vfs_context_t ctx, int enforce_flags)
	220	{
	221	proc_t proc = vfs_context_proc(ctx);
	222
	223	if (proc == NULL)
	224	return 0;
	225
	226	return (mac_proc_check_enforce(proc, enforce_flags));
	227	}
	228
	229	static __inline__ void mac_context_set_enforce(vfs_context_t ctx, int enforce_flags)
	230	{
	231	proc_t proc = vfs_context_proc(ctx);
	232
	233	if (proc == NULL)
	234	return;
	235
	236	mac_proc_set_enforce(proc, enforce_flags);
	237	}
	238
	239
	240	/*
	241	* MAC Framework infrastructure functions.
	242	*/
	243
	244	int mac_error_select(int error1, int error2);
	245
	246	void mac_policy_list_busy(void);
	247	int mac_policy_list_conditional_busy(void);
	248	void mac_policy_list_unbusy(void);
	249
	250	void mac_labelzone_init(void);
	251	struct label *mac_labelzone_alloc(int flags);
	252	void mac_labelzone_free(struct label *label);
	253
	254	void mac_label_init(struct label *label);
	255	void mac_label_destroy(struct label *label);
	256	#if KERNEL
	257	int mac_check_structmac_consistent(struct user_mac *mac);
	258	#else
	259	int mac_check_structmac_consistent(struct mac *mac);
	260	#endif
	261
	262	int mac_cred_label_externalize(struct label , char e, char *out, size_t olen, int flags);
	263	int mac_lctx_label_externalize(struct label , char e, char *out, size_t olen);
	264	#if CONFIG_MACF_SOCKET
	265	int mac_socket_label_externalize(struct label , char e, char *out, size_t olen);
	266	#endif /* CONFIG_MACF_SOCKET */
	267	int mac_vnode_label_externalize(struct label , char e, char *out, size_t olen, int flags);
	268	int mac_pipe_label_externalize(struct label label, char elements,
269	char *outbuf, size_t outbuflen);
270
271	int mac_cred_label_internalize(struct label label, char string);
272	int mac_lctx_label_internalize(struct label label, char string);
273	#if CONFIG_MACF_SOCKET
274	int mac_socket_label_internalize(struct label label, char string);
275	#endif /* CONFIG_MACF_SOCKET */
276	int mac_vnode_label_internalize(struct label label, char string);
277	int mac_pipe_label_internalize(struct label label, char string);
278
279	#if CONFIG_MACF_SOCKET
280	/* internal socket label manipulation functions */
281	struct label *mac_socket_label_alloc(int flags);
282	void mac_socket_label_free(struct label *l);
283	int mac_socket_label_update(struct ucred cred, struct socket so, struct label *l);
284	#endif /* MAC_SOCKET */
285
286	#if CONFIG_MACF_NET
287	struct label mac_mbuf_to_label(struct mbuf m);
288	#else
289	#define mac_mbuf_to_label(m) (NULL)
290	#endif
291
292	/*
293	* MAC_CHECK performs the designated check by walking the policy
294	* module list and checking with each as to how it feels about the
295	* request. Note that it returns its value via 'error' in the scope
296	* of the caller.
297	*/
298	#define MAC_CHECK(check, args...) do { \
299	struct mac_policy_conf *mpc; \
300	u_int i; \
301	\
302	error = 0; \
303	for (i = 0; i < mac_policy_list.staticmax; i++) { \
304	mpc = mac_policy_list.entries[i].mpc; \
305	if (mpc == NULL) \
306	continue; \
307	\
308	if (mpc->mpc_ops->mpo_ ## check != NULL) \
309	error = mac_error_select( \
310	mpc->mpc_ops->mpo_ ## check (args), \
311	error); \
312	} \
313	if (mac_policy_list_conditional_busy() != 0) { \
314	for (; i <= mac_policy_list.maxindex; i++) { \
315	mpc = mac_policy_list.entries[i].mpc; \
316	if (mpc == NULL) \
317	continue; \
318	\
319	if (mpc->mpc_ops->mpo_ ## check != NULL) \
320	error = mac_error_select( \
321	mpc->mpc_ops->mpo_ ## check (args), \
322	error); \
323	} \
324	mac_policy_list_unbusy(); \
325	} \
326	} while (0)
327
6d2010ae A	328	/*
	329	* MAC_GRANT performs the designated check by walking the policy
	330	* module list and checking with each as to how it feels about the
	331	* request. Unlike MAC_CHECK, it grants if any policies return '0',
	332	* and otherwise returns EPERM. Note that it returns its value via
	333	* 'error' in the scope of the caller.
	334	*/
	335	#define MAC_GRANT(check, args...) do { \
	336	struct mac_policy_conf *mpc; \
	337	u_int i; \
	338	\
	339	error = EPERM; \
	340	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	341	mpc = mac_policy_list.entries[i].mpc; \
	342	if (mpc == NULL) \
	343	continue; \
	344	\
	345	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	346	if (mpc->mpc_ops->mpo_ ## check (args) == 0) \
	347	error = 0; \
	348	} \
	349	} \
	350	if (mac_policy_list_conditional_busy() != 0) { \
	351	for (; i <= mac_policy_list.maxindex; i++) { \
	352	mpc = mac_policy_list.entries[i].mpc; \
	353	if (mpc == NULL) \
	354	continue; \
	355	\
	356	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	357	if (mpc->mpc_ops->mpo_ ## check (args) \
	358	== 0) \
	359	error = 0; \
	360	} \
	361	} \
	362	mac_policy_list_unbusy(); \
	363	} \
	364	} while (0)
	365
2d21ac55 A	366	/*
	367	* MAC_BOOLEAN performs the designated boolean composition by walking
	368	* the module list, invoking each instance of the operation, and
	369	* combining the results using the passed C operator. Note that it
	370	* returns its value via 'result' in the scope of the caller, which
	371	* should be initialized by the caller in a meaningful way to get
	372	* a meaningful result.
	373	*/
	374	#define MAC_BOOLEAN(operation, composition, args...) do { \
	375	struct mac_policy_conf *mpc; \
	376	u_int i; \
	377	\
	378	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	379	mpc = mac_policy_list.entries[i].mpc; \
	380	if (mpc == NULL) \
	381	continue; \
	382	\
	383	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	384	result = result composition \
	385	mpc->mpc_ops->mpo_ ## operation \
	386	(args); \
	387	} \
	388	if (mac_policy_list_conditional_busy() != 0) { \
	389	for (; i <= mac_policy_list.maxindex; i++) { \
	390	mpc = mac_policy_list.entries[i].mpc; \
	391	if (mpc == NULL) \
	392	continue; \
	393	\
	394	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	395	result = result composition \
	396	mpc->mpc_ops->mpo_ ## operation \
	397	(args); \
	398	} \
	399	mac_policy_list_unbusy(); \
	400	} \
	401	} while (0)
	402
	403	#define MAC_INTERNALIZE(obj, label, instring) \
	404	mac_internalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_internalize), label, instring)
	405
	406	#define MAC_EXTERNALIZE(obj, label, elementlist, outbuf, outbuflen) \
	407	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize), label, elementlist, outbuf, outbuflen)
	408
	409	#define MAC_EXTERNALIZE_AUDIT(obj, label, outbuf, outbuflen) \
	410	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize_audit), label, "*", outbuf, outbuflen)
	411
	412	/*
	413	* MAC_PERFORM performs the designated operation by walking the policy
	414	* module list and invoking that operation for each policy.
	415	*/
	416	#define MAC_PERFORM(operation, args...) do { \
	417	struct mac_policy_conf *mpc; \
	418	u_int i; \
	419	\
	420	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	421	mpc = mac_policy_list.entries[i].mpc; \
	422	if (mpc == NULL) \
	423	continue; \
	424	\
	425	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	426	mpc->mpc_ops->mpo_ ## operation (args); \
	427	} \
	428	if (mac_policy_list_conditional_busy() != 0) { \
	429	for (; i <= mac_policy_list.maxindex; i++) { \
430	mpc = mac_policy_list.entries[i].mpc; \
431	if (mpc == NULL) \
432	continue; \
433	\
434	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
435	mpc->mpc_ops->mpo_ ## operation (args); \
436	} \
437	mac_policy_list_unbusy(); \
438	} \
439	} while (0)
440
441	struct __mac_get_pid_args;
442	struct __mac_get_proc_args;
443	struct __mac_set_proc_args;
444	struct __mac_get_lcid_args;
445	struct __mac_get_lctx_args;
446	struct __mac_set_lctx_args;
447	struct __mac_get_fd_args;
448	struct __mac_get_file_args;
449	struct __mac_get_link_args;
450	struct __mac_set_fd_args;
451	struct __mac_set_file_args;
452	struct __mac_syscall_args;
453
454	void mac_policy_addto_labellist(const mac_policy_handle_t, int);
455	void mac_policy_removefrom_labellist(const mac_policy_handle_t);
456
457	int mac_externalize(size_t mpo_externalize_off, struct label *label,
458	const char elementlist, char outbuf, size_t outbuflen);
459	int mac_internalize(size_t mpo_internalize_off, struct label *label,
460	char *elementlist);
461	#endif /* !_SECURITY_MAC_INTERNAL_H_ */