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secmodel_bsd44.c revision 1.11.18.1 
      1 /* $NetBSD: secmodel_bsd44.c,v 1.11.18.1 2009/05/04 08:14:34 yamt Exp $ */
      2 /*-
      3  * Copyright (c) 2006 Elad Efrat <elad (at) NetBSD.org>
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: secmodel_bsd44.c,v 1.11.18.1 2009/05/04 08:14:34 yamt Exp $");
     31 
     32 #include <sys/types.h>
     33 #include <sys/param.h>
     34 #include <sys/kauth.h>
     35 
     36 #include <sys/sysctl.h>
     37 #include <sys/mount.h>
     38 
     39 #include <secmodel/secmodel.h>
     40 
     41 #include <secmodel/bsd44/bsd44.h>
     42 #include <secmodel/bsd44/suser.h>
     43 #include <secmodel/securelevel/securelevel.h>
     44 
     45 SYSCTL_SETUP(sysctl_security_bsd44_setup,
     46     "sysctl security bsd44 setup")
     47 {
     48 	const struct sysctlnode *rnode;
     49 
     50 	sysctl_createv(clog, 0, NULL, &rnode,
     51 		       CTLFLAG_PERMANENT,
     52 		       CTLTYPE_NODE, "security", NULL,
     53 		       NULL, 0, NULL, 0,
     54 		       CTL_SECURITY, CTL_EOL);
     55 
     56 	sysctl_createv(clog, 0, &rnode, NULL,
     57 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
     58 		       CTLTYPE_INT, "curtain", NULL,
     59 		       NULL, 0, &secmodel_bsd44_curtain, 0,
     60 		       CTL_CREATE, CTL_EOL);
     61 
     62 	sysctl_createv(clog, 0, &rnode, &rnode,
     63 		       CTLFLAG_PERMANENT,
     64 		       CTLTYPE_NODE, "models", NULL,
     65 		       NULL, 0, NULL, 0,
     66 		       CTL_CREATE, CTL_EOL);
     67 
     68 	sysctl_createv(clog, 0, &rnode, &rnode,
     69 		       CTLFLAG_PERMANENT,
     70 		       CTLTYPE_NODE, "bsd44",
     71 		       SYSCTL_DESCR("Traditional NetBSD Security model, " \
     72 			   "derived from 4.4BSD"),
     73 		       NULL, 0, NULL, 0,
     74 		       CTL_CREATE, CTL_EOL);
     75 
     76 	sysctl_createv(clog, 0, &rnode, NULL,
     77 		       CTLFLAG_PERMANENT,
     78 		       CTLTYPE_STRING, "name", NULL,
     79 		       NULL, 0, __UNCONST("Traditional NetBSD (4.4BSD)"), 0,
     80 		       CTL_CREATE, CTL_EOL);
     81 
     82 	sysctl_createv(clog, 0, &rnode, NULL,
     83 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
     84 		       CTLTYPE_INT, "securelevel",
     85 		       SYSCTL_DESCR("System security level"),
     86 		       secmodel_securelevel_sysctl, 0, NULL, 0,
     87 		       CTL_CREATE, CTL_EOL);
     88 
     89 	sysctl_createv(clog, 0, &rnode, NULL,
     90 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
     91 		       CTLTYPE_INT, "curtain",
     92 		       SYSCTL_DESCR("Curtain information about objects to "
     93 				    "users not owning them."),
     94 		       NULL, 0, &secmodel_bsd44_curtain, 0,
     95 		       CTL_CREATE, CTL_EOL);
     96 
     97 	sysctl_createv(clog, 0, &rnode, NULL,
     98 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
     99 		       CTLTYPE_INT, "usermount",
    100 		       SYSCTL_DESCR("Whether unprivileged users may mount "
    101 				    "filesystems"),
    102 		       NULL, 0, &dovfsusermount, 0,
    103 		       CTL_CREATE, CTL_EOL);
    104 
    105 
    106 	/*
    107 	 * For compatibility, create the "dovfsusermount" variable in its
    108 	 * original location.
    109 	 */
    110 	sysctl_createv(clog, 0, NULL, NULL,
    111 		       CTLFLAG_PERMANENT,
    112 		       CTLTYPE_NODE, "vfs", NULL,
    113 		       NULL, 0, NULL, 0,
    114 		       CTL_VFS, CTL_EOL);
    115 	sysctl_createv(clog, 0, NULL, NULL,
    116 		       CTLFLAG_PERMANENT,
    117 		       CTLTYPE_NODE, "generic",
    118 		       SYSCTL_DESCR("Non-specific vfs related information"),
    119 		       NULL, 0, NULL, 0,
    120 		       CTL_VFS, VFS_GENERIC, CTL_EOL);
    121 	sysctl_createv(clog, 0, NULL, NULL,
    122 		       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
    123 		       CTLTYPE_INT, "usermount",
    124 		       SYSCTL_DESCR("Whether unprivileged users may mount "
    125 				    "filesystems"),
    126 		       NULL, 0, &dovfsusermount, 0,
    127 		       CTL_VFS, VFS_GENERIC, VFS_USERMOUNT, CTL_EOL);
    128 }
    129 
    130 void
    131 secmodel_bsd44_start(void)
    132 {
    133 	secmodel_bsd44_init();
    134 
    135 	secmodel_bsd44_suser_start();
    136 	secmodel_securelevel_start();
    137 
    138 	secmodel_register();
    139 }
    140 
    141 #if defined(_LKM)
    142 void
    143 secmodel_bsd44_stop(void)
    144 {
    145 	secmodel_bsd44_suser_stop();
    146 	secmodel_securelevel_stop();
    147 
    148 	secmodel_deregister();
    149 }
    150 #endif /* _LKM */
    151 
    152 #if !defined(_LKM)
    153 void
    154 secmodel_start(void)
    155 {
    156 	secmodel_bsd44_start();
    157 }
    158 #endif /* !_LKM */
    159 
    160 
    161