[apple/xnu.git] / security / mac_pipe.c

/*
 * 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) 2002, 2003 Networks Associates Technology, Inc.
 * Copyright (c) 2005 SPARTA, Inc.
 * All rights reserved.
 *
 * 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.
 */

#include <sys/cdefs.h>

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/pipe.h>
#include <sys/sysctl.h>

#include <security/mac_internal.h>


struct label *
mac_pipe_label_alloc(void)
{
	struct label *label;

	label = mac_labelzone_alloc(MAC_WAITOK);
	if (label == NULL)
		return (NULL);
	MAC_PERFORM(pipe_label_init, label);
	return (label);
}

void
mac_pipe_label_init(struct pipe *cpipe)
{

	cpipe->pipe_label = mac_pipe_label_alloc();
}

void
mac_pipe_label_free(struct label *label)
{

	MAC_PERFORM(pipe_label_destroy, label);
	mac_labelzone_free(label);
}

void
mac_pipe_label_destroy(struct pipe *cpipe)
{

	mac_pipe_label_free(cpipe->pipe_label);
	cpipe->pipe_label = NULL;
}

void
mac_pipe_label_copy(struct label *src, struct label *dest)
{

	MAC_PERFORM(pipe_label_copy, src, dest);
}

int
mac_pipe_label_externalize(struct label *label, char *elements,
    char *outbuf, size_t outbuflen)
{
	int error;

	error = MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen);

	return (error);
}

int
mac_pipe_label_internalize(struct label *label, char *string)
{
	int error;

	error = MAC_INTERNALIZE(pipe, label, string);

	return (error);
}

void
mac_pipe_label_associate(kauth_cred_t cred, struct pipe *cpipe)
{

	MAC_PERFORM(pipe_label_associate, cred, cpipe, cpipe->pipe_label);
}

int
mac_pipe_check_kqfilter(kauth_cred_t cred, struct knote *kn,
    struct pipe *cpipe)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif
	MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, cpipe->pipe_label);
	return (error);
}
int
mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_int cmd)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_ioctl, cred, cpipe, cpipe->pipe_label, cmd);

	return (error);
}

int
mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_read, cred, cpipe, cpipe->pipe_label);

	return (error);
}

static int
mac_pipe_check_label_update(kauth_cred_t cred, struct pipe *cpipe,
    struct label *newlabel)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_label_update, cred, cpipe, cpipe->pipe_label, newlabel);

	return (error);
}

int
mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_select, cred, cpipe, cpipe->pipe_label, which);

	return (error);
}

int
mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_stat, cred, cpipe, cpipe->pipe_label);

	return (error);
}

int
mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe)
{
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_pipe_enforce)
        return (0);
#endif

	MAC_CHECK(pipe_check_write, cred, cpipe, cpipe->pipe_label);

	return (error);
}

int
mac_pipe_label_update(kauth_cred_t cred, struct pipe *cpipe,
    struct label *label)
{
	int error;

	error = mac_pipe_check_label_update(cred, cpipe, label);
	if (error)
		return (error);

	MAC_PERFORM(pipe_label_update, cred, cpipe, cpipe->pipe_label, label);

	return (0);
}
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	* Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
	30	* Copyright (c) 2005 SPARTA, Inc.
	31	* All rights reserved.
	32	*
	33	* This software was developed for the FreeBSD Project in part by Network
	34	* Associates Laboratories, the Security Research Division of Network
	35	* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
	36	* as part of the DARPA CHATS research program.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	* 1. Redistributions of source code must retain the above copyright
	42	* notice, this list of conditions and the following disclaimer.
	43	* 2. Redistributions in binary form must reproduce the above copyright
	44	* notice, this list of conditions and the following disclaimer in the
	45	* documentation and/or other materials provided with the distribution.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*/
	59
	60	#include <sys/cdefs.h>
	61
	62	#include <sys/param.h>
	63	#include <sys/kernel.h>
	64	#include <sys/lock.h>
65	#include <sys/malloc.h>
66	#include <sys/sbuf.h>
67	#include <sys/systm.h>
68	#include <sys/vnode.h>
69	#include <sys/pipe.h>
70	#include <sys/sysctl.h>
71
72	#include <security/mac_internal.h>
73
74
75	struct label *
76	mac_pipe_label_alloc(void)
77	{
78	struct label *label;
79
80	label = mac_labelzone_alloc(MAC_WAITOK);
81	if (label == NULL)
82	return (NULL);
83	MAC_PERFORM(pipe_label_init, label);
84	return (label);
85	}
86
87	void
88	mac_pipe_label_init(struct pipe *cpipe)
89	{
90
91	cpipe->pipe_label = mac_pipe_label_alloc();
92	}
93
94	void
95	mac_pipe_label_free(struct label *label)
96	{
97
98	MAC_PERFORM(pipe_label_destroy, label);
99	mac_labelzone_free(label);
100	}
101
102	void
103	mac_pipe_label_destroy(struct pipe *cpipe)
104	{
105
106	mac_pipe_label_free(cpipe->pipe_label);
107	cpipe->pipe_label = NULL;
108	}
109
110	void
111	mac_pipe_label_copy(struct label src, struct label dest)
112	{
113
114	MAC_PERFORM(pipe_label_copy, src, dest);
115	}
116
117	int
118	mac_pipe_label_externalize(struct label label, char elements,
119	char *outbuf, size_t outbuflen)
120	{
121	int error;
122
123	error = MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen);
124
125	return (error);
126	}
127
128	int
129	mac_pipe_label_internalize(struct label label, char string)
130	{
131	int error;
132
133	error = MAC_INTERNALIZE(pipe, label, string);
134
135	return (error);
136	}
137
138	void
139	mac_pipe_label_associate(kauth_cred_t cred, struct pipe *cpipe)
140	{
141
142	MAC_PERFORM(pipe_label_associate, cred, cpipe, cpipe->pipe_label);
143	}
144
145	int
146	mac_pipe_check_kqfilter(kauth_cred_t cred, struct knote *kn,
147	struct pipe *cpipe)
148	{
149	int error;
150
3e170ce0 A	151	#if SECURITY_MAC_CHECK_ENFORCE
	152	/* 21167099 - only check if we allow write */
	153	if (!mac_pipe_enforce)
	154	return (0);
	155	#endif
2d21ac55 A	156	MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, cpipe->pipe_label);
	157	return (error);
	158	}
	159	int
	160	mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_int cmd)
	161	{
	162	int error;
	163
3e170ce0 A	164	#if SECURITY_MAC_CHECK_ENFORCE
	165	/* 21167099 - only check if we allow write */
	166	if (!mac_pipe_enforce)
	167	return (0);
	168	#endif
2d21ac55 A	169
	170	MAC_CHECK(pipe_check_ioctl, cred, cpipe, cpipe->pipe_label, cmd);
	171
	172	return (error);
	173	}
	174
	175	int
	176	mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe)
	177	{
	178	int error;
	179
3e170ce0 A	180	#if SECURITY_MAC_CHECK_ENFORCE
	181	/* 21167099 - only check if we allow write */
	182	if (!mac_pipe_enforce)
	183	return (0);
	184	#endif
2d21ac55 A	185
	186	MAC_CHECK(pipe_check_read, cred, cpipe, cpipe->pipe_label);
	187
	188	return (error);
	189	}
	190
	191	static int
	192	mac_pipe_check_label_update(kauth_cred_t cred, struct pipe *cpipe,
	193	struct label *newlabel)
	194	{
	195	int error;
	196
3e170ce0 A	197	#if SECURITY_MAC_CHECK_ENFORCE
	198	/* 21167099 - only check if we allow write */
	199	if (!mac_pipe_enforce)
	200	return (0);
	201	#endif
2d21ac55 A	202
	203	MAC_CHECK(pipe_check_label_update, cred, cpipe, cpipe->pipe_label, newlabel);
	204
	205	return (error);
	206	}
	207
	208	int
	209	mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which)
	210	{
	211	int error;
	212
3e170ce0 A	213	#if SECURITY_MAC_CHECK_ENFORCE
	214	/* 21167099 - only check if we allow write */
	215	if (!mac_pipe_enforce)
	216	return (0);
	217	#endif
2d21ac55 A	218
	219	MAC_CHECK(pipe_check_select, cred, cpipe, cpipe->pipe_label, which);
	220
	221	return (error);
	222	}
	223
	224	int
	225	mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe)
	226	{
	227	int error;
	228
3e170ce0 A	229	#if SECURITY_MAC_CHECK_ENFORCE
	230	/* 21167099 - only check if we allow write */
	231	if (!mac_pipe_enforce)
	232	return (0);
	233	#endif
2d21ac55 A	234
	235	MAC_CHECK(pipe_check_stat, cred, cpipe, cpipe->pipe_label);
	236
	237	return (error);
	238	}
	239
	240	int
	241	mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe)
	242	{
	243	int error;
	244
3e170ce0 A	245	#if SECURITY_MAC_CHECK_ENFORCE
	246	/* 21167099 - only check if we allow write */
	247	if (!mac_pipe_enforce)
	248	return (0);
	249	#endif
2d21ac55 A	250
	251	MAC_CHECK(pipe_check_write, cred, cpipe, cpipe->pipe_label);
	252
	253	return (error);
	254	}
	255
	256	int
	257	mac_pipe_label_update(kauth_cred_t cred, struct pipe *cpipe,
	258	struct label *label)
	259	{
	260	int error;
	261
	262	error = mac_pipe_check_label_update(cred, cpipe, label);
	263	if (error)
	264	return (error);
	265
	266	MAC_PERFORM(pipe_label_update, cred, cpipe, cpipe->pipe_label, label);
	267
	268	return (0);
	269	}