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

/*
 * Copyright (c) 2007-2010 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.
 *
 * 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.
 *
 */

#include <string.h>
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/malloc.h>
#include <sys/sbuf.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/imgact.h>
#include <mach/mach_types.h>
#include <kern/task.h>

#include <security/mac_internal.h>
#include <security/mac_mach_internal.h>

#include <bsd/security/audit/audit.h>

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

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

void
mac_cred_label_init(struct ucred *cred)
{
	cred->cr_label = mac_cred_label_alloc();
}

void
mac_cred_label_free(struct label *label)
{
	MAC_PERFORM(cred_label_destroy, label);
	mac_labelzone_free(label);
}

int
mac_cred_label_compare(struct label *a, struct label *b)
{
	return (bcmp(a, b, sizeof (*a)) == 0);
}

int
mac_cred_label_externalize_audit(struct proc *p, struct mac *mac)
{
	kauth_cred_t cr;
	int error;

	cr = kauth_cred_proc_ref(p);

	error = MAC_EXTERNALIZE_AUDIT(cred, cr->cr_label,
	    mac->m_string, mac->m_buflen);

	kauth_cred_unref(&cr);
	return (error);
}

void
mac_cred_label_destroy(kauth_cred_t cred)
{

	mac_cred_label_free(cred->cr_label);
	cred->cr_label = NULL;
}

int
mac_cred_label_externalize(struct label *label, char *elements,
    char *outbuf, size_t outbuflen, int flags __unused)
{
	int error = 0;

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

	return (error);
}

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

	error = MAC_INTERNALIZE(cred, label, string);

	return (error);
}

/*
 * By default, fork just adds a reference to the parent
 * credential.  Policies may need to know about this reference
 * if they are tracking exit calls to know when to free the
 * label.
 */
void
mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
{
	MAC_PERFORM(cred_label_associate_fork, cred, proc);
}
	
/*
 * Initialize MAC label for the first kernel process, from which other
 * kernel processes and threads are spawned.
 */
void
mac_cred_label_associate_kernel(kauth_cred_t cred)
{

	MAC_PERFORM(cred_label_associate_kernel, cred);
}

/*
 * Initialize MAC label for the first userland process, from which other
 * userland processes and threads are spawned.
 */
void
mac_cred_label_associate_user(kauth_cred_t cred)
{

	MAC_PERFORM(cred_label_associate_user, cred);
}

/*
 * When a new process is created, its label must be initialized.  Generally,
 * this involves inheritence from the parent process, modulo possible
 * deltas.  This function allows that processing to take place.
 */
void
mac_cred_label_associate(struct ucred *parent_cred, struct ucred *child_cred)
{

	MAC_PERFORM(cred_label_associate, parent_cred, child_cred);
}

int
mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
{
	struct user_mac mac;
	struct label *execlabel;
	char *buffer;
	int error;
	size_t ulen;

	if (mac_p == USER_ADDR_NULL)
		return (0);

	if (IS_64BIT_PROCESS(current_proc())) {
		struct user64_mac mac64;
		error = copyin(mac_p, &mac64, sizeof(mac64));
		mac.m_buflen = mac64.m_buflen;
		mac.m_string = mac64.m_string;
	} else {
		struct user32_mac mac32;
		error = copyin(mac_p, &mac32, sizeof(mac32));
		mac.m_buflen = mac32.m_buflen;
		mac.m_string = mac32.m_string;
	}
	if (error)
		return (error);

	error = mac_check_structmac_consistent(&mac);
	if (error)
		return (error);

	execlabel = mac_cred_label_alloc();
	MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
	error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen);
	if (error)
		goto out;
	AUDIT_ARG(mac_string, buffer);

	error = mac_cred_label_internalize(execlabel, buffer);
out:
	if (error) {
		mac_cred_label_free(execlabel);
		execlabel = NULL;
	}
	imgp->ip_execlabelp = execlabel;
	FREE(buffer, M_MACTEMP);
	return (error);
}

/*
 * When the subject's label changes, it may require revocation of privilege
 * to mapped objects.  This can't be done on-the-fly later with a unified
 * buffer cache.
 *
 * XXX:		CRF_MAC_ENFORCE should be in a kauth_cred_t field, rather
 * XXX:		than a posix_cred_t field.
 */
void
mac_cred_label_update(kauth_cred_t cred, struct label *newlabel)
{
	posix_cred_t pcred = posix_cred_get(cred);

	/* force label to be part of "matching" for credential */
	pcred->cr_flags |= CRF_MAC_ENFORCE;

	/* inform the policies of the update */
	MAC_PERFORM(cred_label_update, cred, newlabel);
}

int
mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
{
	int error;

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

	MAC_CHECK(cred_check_label_update, cred, newlabel);

	return (error);
}

int
mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
{
	int error;

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

	MAC_CHECK(cred_check_visible, u1, u2);


	return (error);
}

/*                                                                                                    
 * called with process locked.                                                                        
 */
void mac_proc_set_enforce(proc_t p, int enforce_flags)
{
        p->p_mac_enforce |= enforce_flags;
}

int
mac_proc_check_debug(proc_t curp, struct proc *proc)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_debug, cred, proc);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_fork(proc_t curp)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_fork, cred, curp);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_get_task_name(struct ucred *cred, struct proc *p)
{
	int error;

	MAC_CHECK(proc_check_get_task_name, cred, p);

	return (error);
}

int
mac_proc_check_get_task(struct ucred *cred, struct proc *p)
{
	int error;

	MAC_CHECK(proc_check_get_task, cred, p);

	return (error);
}

int
mac_proc_check_expose_task(struct ucred *cred, struct proc *p)
{
	int error;

	MAC_CHECK(proc_check_expose_task, cred, p);

	return (error);
}

int
mac_proc_check_inherit_ipc_ports(struct proc *p, struct vnode *cur_vp, off_t cur_offset, struct vnode *img_vp, off_t img_offset, struct vnode *scriptvp)
{
	int error;

	MAC_CHECK(proc_check_inherit_ipc_ports, p, cur_vp, cur_offset, img_vp, img_offset, scriptvp);

	return (error);
}

/*
 * The type of maxprot in proc_check_map_anon must be equivalent to vm_prot_t
 * (defined in <mach/vm_prot.h>). mac_policy.h does not include any header
 * files, so cannot use the typedef itself.
 */
int
mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr,
    user_size_t u_size, int prot, int flags, int *maxprot)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_vm_enforce)
        return 0;
#endif
	if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
		return (0);

	cred = kauth_cred_proc_ref(proc);
	MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_mprotect(proc_t proc,
    user_addr_t addr, user_size_t size, int prot)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_vm_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
        return (0);

	cred = kauth_cred_proc_ref(proc);
	MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_run_cs_invalid(proc_t proc)
{
	int error;
	
#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_vm_enforce)
        return 0;
#endif
	
	MAC_CHECK(proc_check_run_cs_invalid, proc);
	
	return (error);
}
				   
int
mac_proc_check_sched(proc_t curp, struct proc *proc)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_sched, cred, proc);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_signal, cred, proc, signum);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_wait(proc_t curp, struct proc *proc)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_wait, cred, proc);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_suspend_resume(proc_t curp, int sr)
{
	kauth_cred_t cred;
	int error;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
{
	kauth_cred_t cred;
	int error = 0;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_cpumon(proc_t curp)
{
	kauth_cred_t cred;
	int error = 0;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_cpumon, cred);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
{
	kauth_cred_t cred;
	int error = 0;

#if SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
        return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor);
	kauth_cred_unref(&cred);

	return (error);
}
Commit	Line	Data
2d21ac55	1	/*
6d2010ae	2	* Copyright (c) 2007-2010 Apple Inc. All rights reserved.
2d21ac55 A	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	*
	34	* This software was developed by Robert Watson and Ilmar Habibulin for the
	35	* TrustedBSD Project.
	36	*
	37	* This software was developed for the FreeBSD Project in part by Network
	38	* Associates Laboratories, the Security Research Division of Network
	39	* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
	40	* as part of the DARPA CHATS research program.
	41	*
	42	* Redistribution and use in source and binary forms, with or without
	43	* modification, are permitted provided that the following conditions
	44	* are met:
	45	* 1. Redistributions of source code must retain the above copyright
	46	* notice, this list of conditions and the following disclaimer.
	47	* 2. Redistributions in binary form must reproduce the above copyright
	48	* notice, this list of conditions and the following disclaimer in the
	49	* documentation and/or other materials provided with the distribution.
	50	*
	51	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	52	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	53	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	54	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	55	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	56	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	57	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	58	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	59	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	60	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	61	* SUCH DAMAGE.
	62	*
	63	*/
	64
	65	#include <string.h>
	66	#include <sys/param.h>
67	#include <sys/ucred.h>
68	#include <sys/malloc.h>
69	#include <sys/sbuf.h>
70	#include <sys/vnode.h>
71	#include <sys/proc.h>
72	#include <sys/proc_internal.h>
73	#include <sys/kauth.h>
74	#include <sys/imgact.h>
316670eb	75	#include <mach/mach_types.h>
3e170ce0	76	#include <kern/task.h>
2d21ac55 A	77
2d21ac55 A	78	#include <security/mac_internal.h>
316670eb	79	#include <security/mac_mach_internal.h>
2d21ac55	80
b0d623f7	81	#include <bsd/security/audit/audit.h>
2d21ac55 A	82
	83	struct label *
	84	mac_cred_label_alloc(void)
	85	{
	86	struct label *label;
	87
	88	label = mac_labelzone_alloc(MAC_WAITOK);
	89	if (label == NULL)
	90	return (NULL);
	91	MAC_PERFORM(cred_label_init, label);
	92	return (label);
	93	}
	94
	95	void
	96	mac_cred_label_init(struct ucred *cred)
	97	{
	98	cred->cr_label = mac_cred_label_alloc();
	99	}
	100
	101	void
	102	mac_cred_label_free(struct label *label)
	103	{
	104	MAC_PERFORM(cred_label_destroy, label);
	105	mac_labelzone_free(label);
	106	}
	107
316670eb A	108	int
	109	mac_cred_label_compare(struct label a, struct label b)
	110	{
	111	return (bcmp(a, b, sizeof (*a)) == 0);
	112	}
	113
2d21ac55 A	114	int
	115	mac_cred_label_externalize_audit(struct proc p, struct mac mac)
	116	{
	117	kauth_cred_t cr;
	118	int error;
	119
	120	cr = kauth_cred_proc_ref(p);
	121
	122	error = MAC_EXTERNALIZE_AUDIT(cred, cr->cr_label,
	123	mac->m_string, mac->m_buflen);
	124
	125	kauth_cred_unref(&cr);
	126	return (error);
	127	}
	128
	129	void
	130	mac_cred_label_destroy(kauth_cred_t cred)
	131	{
	132
	133	mac_cred_label_free(cred->cr_label);
	134	cred->cr_label = NULL;
	135	}
	136
	137	int
	138	mac_cred_label_externalize(struct label label, char elements,
	139	char *outbuf, size_t outbuflen, int flags __unused)
	140	{
	141	int error = 0;
	142
	143	error = MAC_EXTERNALIZE(cred, label, elements, outbuf, outbuflen);
	144
	145	return (error);
	146	}
	147
	148	int
	149	mac_cred_label_internalize(struct label label, char string)
	150	{
	151	int error;
	152
	153	error = MAC_INTERNALIZE(cred, label, string);
	154
	155	return (error);
	156	}
	157
	158	/*
	159	* By default, fork just adds a reference to the parent
	160	* credential. Policies may need to know about this reference
	161	* if they are tracking exit calls to know when to free the
	162	* label.
	163	*/
	164	void
	165	mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
	166	{
	167	MAC_PERFORM(cred_label_associate_fork, cred, proc);
	168	}
	169
	170	/*
	171	* Initialize MAC label for the first kernel process, from which other
	172	* kernel processes and threads are spawned.
	173	*/
	174	void
	175	mac_cred_label_associate_kernel(kauth_cred_t cred)
	176	{
	177
178	MAC_PERFORM(cred_label_associate_kernel, cred);
179	}
180
181	/*
182	* Initialize MAC label for the first userland process, from which other
183	* userland processes and threads are spawned.
184	*/
185	void
186	mac_cred_label_associate_user(kauth_cred_t cred)
187	{
188
189	MAC_PERFORM(cred_label_associate_user, cred);
190	}
191
192	/*
193	* When a new process is created, its label must be initialized. Generally,
194	* this involves inheritence from the parent process, modulo possible
195	* deltas. This function allows that processing to take place.
196	*/
197	void
198	mac_cred_label_associate(struct ucred parent_cred, struct ucred child_cred)
199	{
200
201	MAC_PERFORM(cred_label_associate, parent_cred, child_cred);
202	}
203
204	int
205	mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
206	{
207	struct user_mac mac;
208	struct label *execlabel;
209	char *buffer;
210	int error;
211	size_t ulen;
212
213	if (mac_p == USER_ADDR_NULL)
214	return (0);
215
216	if (IS_64BIT_PROCESS(current_proc())) {
6d2010ae A	217	struct user64_mac mac64;
	218	error = copyin(mac_p, &mac64, sizeof(mac64));
	219	mac.m_buflen = mac64.m_buflen;
	220	mac.m_string = mac64.m_string;
2d21ac55	221	} else {
6d2010ae	222	struct user32_mac mac32;
2d21ac55 A	223	error = copyin(mac_p, &mac32, sizeof(mac32));
2d21ac55 A	224	mac.m_buflen = mac32.m_buflen;
6d2010ae	225	mac.m_string = mac32.m_string;
2d21ac55 A	226	}
	227	if (error)
	228	return (error);
	229
	230	error = mac_check_structmac_consistent(&mac);
	231	if (error)
	232	return (error);
	233
	234	execlabel = mac_cred_label_alloc();
	235	MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
	236	error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen);
	237	if (error)
	238	goto out;
	239	AUDIT_ARG(mac_string, buffer);
	240
	241	error = mac_cred_label_internalize(execlabel, buffer);
	242	out:
	243	if (error) {
	244	mac_cred_label_free(execlabel);
	245	execlabel = NULL;
	246	}
	247	imgp->ip_execlabelp = execlabel;
	248	FREE(buffer, M_MACTEMP);
	249	return (error);
	250	}
	251
	252	/*
	253	* When the subject's label changes, it may require revocation of privilege
	254	* to mapped objects. This can't be done on-the-fly later with a unified
	255	* buffer cache.
6d2010ae A	256	*
	257	* XXX: CRF_MAC_ENFORCE should be in a kauth_cred_t field, rather
	258	* XXX: than a posix_cred_t field.
2d21ac55 A	259	*/
	260	void
	261	mac_cred_label_update(kauth_cred_t cred, struct label *newlabel)
	262	{
6d2010ae	263	posix_cred_t pcred = posix_cred_get(cred);
2d21ac55 A	264
2d21ac55 A	265	/* force label to be part of "matching" for credential */
6d2010ae	266	pcred->cr_flags \|= CRF_MAC_ENFORCE;
2d21ac55 A	267
	268	/* inform the policies of the update */
	269	MAC_PERFORM(cred_label_update, cred, newlabel);
	270	}
	271
	272	int
	273	mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
	274	{
	275	int error;
	276
3e170ce0 A	277	#if SECURITY_MAC_CHECK_ENFORCE
	278	/* 21167099 - only check if we allow write */
	279	if (!mac_proc_enforce)
	280	return 0;
	281	#endif
2d21ac55 A	282
	283	MAC_CHECK(cred_check_label_update, cred, newlabel);
	284
	285	return (error);
	286	}
	287
	288	int
	289	mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
	290	{
	291	int error;
	292
3e170ce0 A	293	#if SECURITY_MAC_CHECK_ENFORCE
	294	/* 21167099 - only check if we allow write */
	295	if (!mac_proc_enforce)
	296	return 0;
	297	#endif
2d21ac55 A	298
	299	MAC_CHECK(cred_check_visible, u1, u2);
	300
	301
	302	return (error);
	303	}
	304
	305	/*
	306	* called with process locked.
	307	*/
	308	void mac_proc_set_enforce(proc_t p, int enforce_flags)
	309	{
	310	p->p_mac_enforce \|= enforce_flags;
	311	}
	312
	313	int
	314	mac_proc_check_debug(proc_t curp, struct proc *proc)
	315	{
	316	kauth_cred_t cred;
	317	int error;
	318
3e170ce0 A	319	#if SECURITY_MAC_CHECK_ENFORCE
	320	/* 21167099 - only check if we allow write */
	321	if (!mac_proc_enforce)
	322	return 0;
	323	#endif
	324
	325	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	326	return 0;
2d21ac55 A	327
	328	cred = kauth_cred_proc_ref(curp);
	329	MAC_CHECK(proc_check_debug, cred, proc);
	330	kauth_cred_unref(&cred);
	331
	332	return (error);
	333	}
	334
	335	int
	336	mac_proc_check_fork(proc_t curp)
	337	{
	338	kauth_cred_t cred;
	339	int error;
	340
3e170ce0 A	341	#if SECURITY_MAC_CHECK_ENFORCE
	342	/* 21167099 - only check if we allow write */
	343	if (!mac_proc_enforce)
	344	return 0;
	345	#endif
	346
	347	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	348	return 0;
2d21ac55 A	349
	350	cred = kauth_cred_proc_ref(curp);
	351	MAC_CHECK(proc_check_fork, cred, curp);
	352	kauth_cred_unref(&cred);
	353
	354	return (error);
	355	}
	356
	357	int
	358	mac_proc_check_get_task_name(struct ucred cred, struct proc p)
	359	{
	360	int error;
	361
	362	MAC_CHECK(proc_check_get_task_name, cred, p);
	363
	364	return (error);
	365	}
	366
	367	int
	368	mac_proc_check_get_task(struct ucred cred, struct proc p)
	369	{
	370	int error;
	371
	372	MAC_CHECK(proc_check_get_task, cred, p);
	373
	374	return (error);
	375	}
	376
3e170ce0 A	377	int
	378	mac_proc_check_expose_task(struct ucred cred, struct proc p)
	379	{
	380	int error;
	381
	382	MAC_CHECK(proc_check_expose_task, cred, p);
	383
	384	return (error);
	385	}
	386
fe8ab488 A	387	int
	388	mac_proc_check_inherit_ipc_ports(struct proc p, struct vnode cur_vp, off_t cur_offset, struct vnode img_vp, off_t img_offset, struct vnode scriptvp)
	389	{
	390	int error;
	391
	392	MAC_CHECK(proc_check_inherit_ipc_ports, p, cur_vp, cur_offset, img_vp, img_offset, scriptvp);
	393
	394	return (error);
	395	}
	396
6d2010ae A	397	/*
	398	* The type of maxprot in proc_check_map_anon must be equivalent to vm_prot_t
	399	* (defined in <mach/vm_prot.h>). mac_policy.h does not include any header
	400	* files, so cannot use the typedef itself.
	401	*/
	402	int
	403	mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr,
	404	user_size_t u_size, int prot, int flags, int *maxprot)
	405	{
	406	kauth_cred_t cred;
	407	int error;
	408
3e170ce0 A	409	#if SECURITY_MAC_CHECK_ENFORCE
	410	/* 21167099 - only check if we allow write */
	411	if (!mac_vm_enforce)
	412	return 0;
	413	#endif
	414	if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
6d2010ae A	415	return (0);
	416
	417	cred = kauth_cred_proc_ref(proc);
	418	MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot);
	419	kauth_cred_unref(&cred);
	420
	421	return (error);
	422	}
	423
2d21ac55 A	424	int
	425	mac_proc_check_mprotect(proc_t proc,
	426	user_addr_t addr, user_size_t size, int prot)
	427	{
	428	kauth_cred_t cred;
	429	int error;
	430
3e170ce0 A	431	#if SECURITY_MAC_CHECK_ENFORCE
	432	/* 21167099 - only check if we allow write */
	433	if (!mac_vm_enforce)
	434	return 0;
	435	#endif
	436	if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
	437	return (0);
2d21ac55 A	438
	439	cred = kauth_cred_proc_ref(proc);
	440	MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
	441	kauth_cred_unref(&cred);
	442
	443	return (error);
	444	}
	445
593a1d5f	446	int
b0d623f7	447	mac_proc_check_run_cs_invalid(proc_t proc)
593a1d5f	448	{
593a1d5f A	449	int error;
593a1d5f A	450
3e170ce0 A	451	#if SECURITY_MAC_CHECK_ENFORCE
	452	/* 21167099 - only check if we allow write */
	453	if (!mac_vm_enforce)
	454	return 0;
	455	#endif
593a1d5f	456
b0d623f7	457	MAC_CHECK(proc_check_run_cs_invalid, proc);
593a1d5f A	458
	459	return (error);
	460	}
	461
2d21ac55 A	462	int
	463	mac_proc_check_sched(proc_t curp, struct proc *proc)
	464	{
	465	kauth_cred_t cred;
	466	int error;
	467
3e170ce0 A	468	#if SECURITY_MAC_CHECK_ENFORCE
	469	/* 21167099 - only check if we allow write */
	470	if (!mac_proc_enforce)
	471	return 0;
	472	#endif
	473
	474	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	475	return 0;
2d21ac55 A	476
	477	cred = kauth_cred_proc_ref(curp);
	478	MAC_CHECK(proc_check_sched, cred, proc);
	479	kauth_cred_unref(&cred);
	480
	481	return (error);
	482	}
	483
	484	int
	485	mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
	486	{
	487	kauth_cred_t cred;
	488	int error;
	489
3e170ce0 A	490	#if SECURITY_MAC_CHECK_ENFORCE
	491	/* 21167099 - only check if we allow write */
	492	if (!mac_proc_enforce)
	493	return 0;
	494	#endif
	495
	496	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	497	return 0;
2d21ac55 A	498
	499	cred = kauth_cred_proc_ref(curp);
	500	MAC_CHECK(proc_check_signal, cred, proc, signum);
	501	kauth_cred_unref(&cred);
	502
	503	return (error);
	504	}
	505
	506	int
	507	mac_proc_check_wait(proc_t curp, struct proc *proc)
	508	{
	509	kauth_cred_t cred;
	510	int error;
	511
3e170ce0 A	512	#if SECURITY_MAC_CHECK_ENFORCE
	513	/* 21167099 - only check if we allow write */
	514	if (!mac_proc_enforce)
	515	return 0;
	516	#endif
	517	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	518	return 0;
2d21ac55 A	519
	520	cred = kauth_cred_proc_ref(curp);
	521	MAC_CHECK(proc_check_wait, cred, proc);
	522	kauth_cred_unref(&cred);
	523
	524	return (error);
	525	}
	526
d1ecb069 A	527	int
	528	mac_proc_check_suspend_resume(proc_t curp, int sr)
	529	{
	530	kauth_cred_t cred;
	531	int error;
	532
3e170ce0 A	533	#if SECURITY_MAC_CHECK_ENFORCE
	534	/* 21167099 - only check if we allow write */
	535	if (!mac_proc_enforce)
	536	return 0;
	537	#endif
	538	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	539	return 0;
d1ecb069 A	540
	541	cred = kauth_cred_proc_ref(curp);
	542	MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
	543	kauth_cred_unref(&cred);
	544
	545	return (error);
	546	}
316670eb A	547
	548	int
	549	mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
	550	{
	551	kauth_cred_t cred;
	552	int error = 0;
	553
3e170ce0 A	554	#if SECURITY_MAC_CHECK_ENFORCE
	555	/* 21167099 - only check if we allow write */
	556	if (!mac_proc_enforce)
	557	return 0;
	558	#endif
	559	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	560	return 0;
316670eb A	561
	562	cred = kauth_cred_proc_ref(curp);
	563	MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
	564	kauth_cred_unref(&cred);
	565
	566	return (error);
	567	}
	568
39236c6e A	569	int
	570	mac_proc_check_cpumon(proc_t curp)
	571	{
	572	kauth_cred_t cred;
	573	int error = 0;
	574
3e170ce0 A	575	#if SECURITY_MAC_CHECK_ENFORCE
	576	/* 21167099 - only check if we allow write */
	577	if (!mac_proc_enforce)
	578	return 0;
	579	#endif
	580	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	581	return 0;
39236c6e A	582
	583	cred = kauth_cred_proc_ref(curp);
	584	MAC_CHECK(proc_check_cpumon, cred);
	585	kauth_cred_unref(&cred);
	586
	587	return (error);
	588	}
	589
	590	int
	591	mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
	592	{
	593	kauth_cred_t cred;
	594	int error = 0;
	595
3e170ce0 A	596	#if SECURITY_MAC_CHECK_ENFORCE
	597	/* 21167099 - only check if we allow write */
	598	if (!mac_proc_enforce)
	599	return 0;
	600	#endif
	601	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	602	return 0;
39236c6e A	603
	604	cred = kauth_cred_proc_ref(curp);
	605	MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor);
	606	kauth_cred_unref(&cred);
	607
	608	return (error);
	609	}
	610