[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;
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(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);

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@
0a7de745	5	*
2d21ac55 A	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.
0a7de745	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
2d21ac55 A	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
0a7de745	17	*
2d21ac55 A	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.
0a7de745	25	*
2d21ac55 A	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 {
0a7de745 A	103	struct mac_policy_conf *mpc;
0a7de745 A	104	};
2d21ac55 A	105
2d21ac55 A	106	struct mac_policy_list {
0a7de745 A	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;
2d21ac55 A	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 {
0a7de745 A	124	mac_policy_handle_t mll_handle;
0a7de745 A	125	LIST_ENTRY(mac_label_listener) mll_list;
2d21ac55 A	126	};
	127
	128	LIST_HEAD(mac_label_listeners_t, mac_label_listener);
	129
0a7de745	130	/*
2d21ac55	131	* Type of list used to manage label namespace names.
0a7de745	132	*/
2d21ac55	133	struct mac_label_element {
0a7de745 A	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;
2d21ac55 A	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	171	extern unsigned int mac_label_vnodes;
cb323159	172	extern unsigned int mac_vnode_label_count;
b0d623f7	173
5ba3f43e	174	static bool mac_proc_check_enforce(proc_t p);
2d21ac55	175
0a7de745 A	176	static __inline__ bool
0a7de745 A	177	mac_proc_check_enforce(proc_t p)
2d21ac55 A	178	{
2d21ac55 A	179	#if CONFIG_MACF
5ba3f43e	180	// Don't apply policies to the kernel itself.
0a7de745	181	return p != kernproc;
3e170ce0	182	#else
5ba3f43e A	183	#pragma unused(p)
5ba3f43e A	184	return false;
3e170ce0	185	#endif // CONFIG_MACF
2d21ac55 A	186	}
2d21ac55 A	187
5ba3f43e	188	static bool mac_cred_check_enforce(kauth_cred_t cred);
2d21ac55	189
0a7de745 A	190	static __inline__ bool
0a7de745 A	191	mac_cred_check_enforce(kauth_cred_t cred)
2d21ac55	192	{
39236c6e	193	#if CONFIG_MACF
0a7de745	194	return cred != proc_ucred(kernproc);
39236c6e	195	#else
5ba3f43e A	196	#pragma unused(p)
	197	return false;
	198	#endif // CONFIG_MACF
2d21ac55 A	199	}
2d21ac55 A	200
2d21ac55 A	201	/*
	202	* MAC Framework infrastructure functions.
	203	*/
	204
	205	int mac_error_select(int error1, int error2);
	206
	207	void mac_policy_list_busy(void);
	208	int mac_policy_list_conditional_busy(void);
	209	void mac_policy_list_unbusy(void);
	210
	211	void mac_labelzone_init(void);
	212	struct label *mac_labelzone_alloc(int flags);
	213	void mac_labelzone_free(struct label *label);
	214
	215	void mac_label_init(struct label *label);
	216	void mac_label_destroy(struct label *label);
	217	#if KERNEL
	218	int mac_check_structmac_consistent(struct user_mac *mac);
	219	#else
	220	int mac_check_structmac_consistent(struct mac *mac);
	221	#endif
0a7de745	222
2d21ac55	223	int mac_cred_label_externalize(struct label , char e, char *out, size_t olen, int flags);
2d21ac55 A	224	#if CONFIG_MACF_SOCKET
	225	int mac_socket_label_externalize(struct label , char e, char *out, size_t olen);
	226	#endif /* CONFIG_MACF_SOCKET */
	227	int mac_vnode_label_externalize(struct label , char e, char *out, size_t olen, int flags);
	228	int mac_pipe_label_externalize(struct label label, char elements,
0a7de745	229	char *outbuf, size_t outbuflen);
2d21ac55 A	230
2d21ac55 A	231	int mac_cred_label_internalize(struct label label, char string);
2d21ac55 A	232	#if CONFIG_MACF_SOCKET
	233	int mac_socket_label_internalize(struct label label, char string);
	234	#endif /* CONFIG_MACF_SOCKET */
	235	int mac_vnode_label_internalize(struct label label, char string);
	236	int mac_pipe_label_internalize(struct label label, char string);
	237
	238	#if CONFIG_MACF_SOCKET
	239	/* internal socket label manipulation functions */
	240	struct label *mac_socket_label_alloc(int flags);
	241	void mac_socket_label_free(struct label *l);
	242	int mac_socket_label_update(struct ucred cred, struct socket so, struct label *l);
	243	#endif /* MAC_SOCKET */
	244
	245	#if CONFIG_MACF_NET
	246	struct label mac_mbuf_to_label(struct mbuf m);
	247	#else
	248	#define mac_mbuf_to_label(m) (NULL)
	249	#endif
	250
	251	/*
	252	* MAC_CHECK performs the designated check by walking the policy
	253	* module list and checking with each as to how it feels about the
	254	* request. Note that it returns its value via 'error' in the scope
	255	* of the caller.
	256	*/
0a7de745 A	257	#define MAC_CHECK(check, args...) do { \
	258	struct mac_policy_conf *mpc; \
	259	u_int i; \
	260	\
	261	error = 0; \
	262	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	263	mpc = mac_policy_list.entries[i].mpc; \
	264	if (mpc == NULL) \
	265	continue; \
2d21ac55	266	\
0a7de745 A	267	if (mpc->mpc_ops->mpo_ ## check != NULL) \
	268	error = mac_error_select( \
	269	mpc->mpc_ops->mpo_ ## check (args), \
	270	error); \
	271	} \
	272	if (mac_policy_list_conditional_busy() != 0) { \
	273	for (; i <= mac_policy_list.maxindex; i++) { \
	274	mpc = mac_policy_list.entries[i].mpc; \
	275	if (mpc == NULL) \
	276	continue; \
	277	\
	278	if (mpc->mpc_ops->mpo_ ## check != NULL) \
	279	error = mac_error_select( \
	280	mpc->mpc_ops->mpo_ ## check (args), \
	281	error); \
	282	} \
	283	mac_policy_list_unbusy(); \
	284	} \
2d21ac55 A	285	} while (0)
2d21ac55 A	286
6d2010ae A	287	/*
	288	* MAC_GRANT performs the designated check by walking the policy
	289	* module list and checking with each as to how it feels about the
	290	* request. Unlike MAC_CHECK, it grants if any policies return '0',
	291	* and otherwise returns EPERM. Note that it returns its value via
	292	* 'error' in the scope of the caller.
	293	*/
0a7de745 A	294	#define MAC_GRANT(check, args...) do { \
	295	struct mac_policy_conf *mpc; \
	296	u_int i; \
	297	\
	298	error = EPERM; \
	299	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	300	mpc = mac_policy_list.entries[i].mpc; \
	301	if (mpc == NULL) \
	302	continue; \
	303	\
	304	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	305	if (mpc->mpc_ops->mpo_ ## check (args) == 0) \
	306	error = 0; \
	307	} \
	308	} \
	309	if (mac_policy_list_conditional_busy() != 0) { \
	310	for (; i <= mac_policy_list.maxindex; i++) { \
	311	mpc = mac_policy_list.entries[i].mpc; \
	312	if (mpc == NULL) \
	313	continue; \
	314	\
	315	if (mpc->mpc_ops->mpo_ ## check != NULL) { \
	316	if (mpc->mpc_ops->mpo_ ## check (args) \
	317	== 0) \
	318	error = 0; \
	319	} \
	320	} \
	321	mac_policy_list_unbusy(); \
	322	} \
6d2010ae A	323	} while (0)
6d2010ae A	324
2d21ac55 A	325	/*
	326	* MAC_BOOLEAN performs the designated boolean composition by walking
	327	* the module list, invoking each instance of the operation, and
	328	* combining the results using the passed C operator. Note that it
	329	* returns its value via 'result' in the scope of the caller, which
	330	* should be initialized by the caller in a meaningful way to get
	331	* a meaningful result.
	332	*/
0a7de745 A	333	#define MAC_BOOLEAN(operation, composition, args...) do { \
	334	struct mac_policy_conf *mpc; \
	335	u_int i; \
	336	\
	337	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	338	mpc = mac_policy_list.entries[i].mpc; \
	339	if (mpc == NULL) \
	340	continue; \
2d21ac55	341	\
0a7de745 A	342	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	343	result = result composition \
	344	mpc->mpc_ops->mpo_ ## operation \
	345	(args); \
	346	} \
	347	if (mac_policy_list_conditional_busy() != 0) { \
	348	for (; i <= mac_policy_list.maxindex; i++) { \
	349	mpc = mac_policy_list.entries[i].mpc; \
	350	if (mpc == NULL) \
	351	continue; \
	352	\
	353	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	354	result = result composition \
	355	mpc->mpc_ops->mpo_ ## operation \
	356	(args); \
	357	} \
	358	mac_policy_list_unbusy(); \
	359	} \
2d21ac55 A	360	} while (0)
2d21ac55 A	361
0a7de745	362	#define MAC_INTERNALIZE(obj, label, instring) \
2d21ac55 A	363	mac_internalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_internalize), label, instring)
2d21ac55 A	364
0a7de745	365	#define MAC_EXTERNALIZE(obj, label, elementlist, outbuf, outbuflen) \
2d21ac55 A	366	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize), label, elementlist, outbuf, outbuflen)
2d21ac55 A	367
0a7de745	368	#define MAC_EXTERNALIZE_AUDIT(obj, label, outbuf, outbuflen) \
2d21ac55 A	369	mac_externalize(offsetof(struct mac_policy_ops, mpo_ ## obj ## _label_externalize_audit), label, "*", outbuf, outbuflen)
	370
	371	/*
	372	* MAC_PERFORM performs the designated operation by walking the policy
	373	* module list and invoking that operation for each policy.
	374	*/
0a7de745 A	375	#define MAC_PERFORM(operation, args...) do { \
	376	struct mac_policy_conf *mpc; \
	377	u_int i; \
	378	\
	379	for (i = 0; i < mac_policy_list.staticmax; i++) { \
	380	mpc = mac_policy_list.entries[i].mpc; \
	381	if (mpc == NULL) \
	382	continue; \
	383	\
	384	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	385	mpc->mpc_ops->mpo_ ## operation (args); \
	386	} \
	387	if (mac_policy_list_conditional_busy() != 0) { \
	388	for (; i <= mac_policy_list.maxindex; i++) { \
	389	mpc = mac_policy_list.entries[i].mpc; \
	390	if (mpc == NULL) \
	391	continue; \
	392	\
	393	if (mpc->mpc_ops->mpo_ ## operation != NULL) \
	394	mpc->mpc_ops->mpo_ ## operation (args); \
	395	} \
	396	mac_policy_list_unbusy(); \
	397	} \
2d21ac55 A	398	} while (0)
	399
	400	struct __mac_get_pid_args;
	401	struct __mac_get_proc_args;
	402	struct __mac_set_proc_args;
	403	struct __mac_get_lcid_args;
2d21ac55 A	404	struct __mac_get_fd_args;
	405	struct __mac_get_file_args;
	406	struct __mac_get_link_args;
	407	struct __mac_set_fd_args;
	408	struct __mac_set_file_args;
	409	struct __mac_syscall_args;
	410
	411	void mac_policy_addto_labellist(const mac_policy_handle_t, int);
	412	void mac_policy_removefrom_labellist(const mac_policy_handle_t);
	413
	414	int mac_externalize(size_t mpo_externalize_off, struct label *label,
	415	const char elementlist, char outbuf, size_t outbuflen);
	416	int mac_internalize(size_t mpo_internalize_off, struct label *label,
	417	char *elementlist);
0a7de745	418	#endif /* !_SECURITY_MAC_INTERNAL_H_ */