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freebsd-dev/lib/libc/posix1e/mac.c

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Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
/*
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
* Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
License update authorized by NAI: remove clause 3.
2002-11-05 01:42:35 +00:00
* 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.
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
*
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <dlfcn.h>
#include <errno.h>
Do not include <sys/syslimits.h> directly; it is not intended for general consumption.
2002-10-27 17:44:33 +00:00
#include <limits.h>
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
Remove unused variables and function declarations. Add missing headers.
2004-01-06 18:26:15 +00:00
#include <unistd.h>
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
#include <sys/mac.h>
static int internal_initialized;
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
/*
* Maintain a list of default label preparations for various object
* types. Each name will appear only once in the list.
*
* XXXMAC: Not thread-safe.
*/
Staticize label_default_head to prevent it from leaking out of mac.c. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-11-17 19:48:35 +00:00
static LIST_HEAD(, label_default) label_default_head;
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
struct label_default {
char *ld_name;
char *ld_labels;
LIST_ENTRY(label_default) ld_entries;
};
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
static void
mac_destroy_labels(void)
{
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
struct label_default *ld;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
while ((ld = LIST_FIRST(&label_default_head))) {
free(ld->ld_name);
free(ld->ld_labels);
LIST_REMOVE(ld, ld_entries);
free(ld);
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
}
static void
mac_destroy_internal(void)
{
mac_destroy_labels();
internal_initialized = 0;
}
static int
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
mac_add_type(const char *name, const char *labels)
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
{
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
struct label_default *ld, *ld_new;
char *name_dup, *labels_dup;
/*
* Speculatively allocate all the memory now to avoid allocating
* later when we will someday hold a mutex.
*/
name_dup = strdup(name);
if (name_dup == NULL) {
errno = ENOMEM;
return (-1);
}
labels_dup = strdup(labels);
if (labels_dup == NULL) {
free(name_dup);
errno = ENOMEM;
return (-1);
}
ld_new = malloc(sizeof(*ld));
if (ld_new == NULL) {
free(name_dup);
free(labels_dup);
errno = ENOMEM;
return (-1);
}
/*
* If the type is already present, replace the current entry
* rather than add a new instance.
*/
for (ld = LIST_FIRST(&label_default_head); ld != NULL;
ld = LIST_NEXT(ld, ld_entries)) {
if (strcmp(name, ld->ld_name) == 0)
break;
}
if (ld != NULL) {
free(ld->ld_labels);
ld->ld_labels = labels_dup;
labels_dup = NULL;
} else {
ld = ld_new;
ld->ld_name = name_dup;
ld->ld_labels = labels_dup;
ld_new = NULL;
name_dup = NULL;
labels_dup = NULL;
LIST_INSERT_HEAD(&label_default_head, ld, ld_entries);
}
if (name_dup != NULL)
free(name_dup);
if (labels_dup != NULL)
free(labels_dup);
if (ld_new != NULL)
free(ld_new);
return (0);
}
static char *
next_token(char **string)
{
char *token;
token = strsep(string, " \t");
while (token != NULL && *token == '\0')
token = strsep(string, " \t");
return (token);
}
static int
mac_init_internal(int ignore_errors)
{
const char *filename;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
char line[LINE_MAX];
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
FILE *file;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
int error;
error = 0;
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
LIST_INIT(&label_default_head);
if (!issetugid() && getenv("MAC_CONFFILE") != NULL)
filename = getenv("MAC_CONFFILE");
else
filename = MAC_CONFFILE;
file = fopen(filename, "r");
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
if (file == NULL)
return (0);
while (fgets(line, LINE_MAX, file)) {
Remove unused variables and function declarations. Add missing headers.
2004-01-06 18:26:15 +00:00
char *comment, *parse, *statement;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
if (line[strlen(line)-1] == '\n')
line[strlen(line)-1] = '\0';
else {
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
if (ignore_errors)
continue;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
fclose(file);
error = EINVAL;
goto just_return;
}
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
/* Remove any comment. */
comment = line;
parse = strsep(&comment, "#");
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
/* Blank lines OK. */
statement = next_token(&parse);
if (statement == NULL)
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
continue;
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
if (strcmp(statement, "default_labels") == 0) {
char *name, *labels;
name = next_token(&parse);
labels = next_token(&parse);
if (name == NULL || labels == NULL ||
next_token(&parse) != NULL) {
if (ignore_errors)
continue;
error = EINVAL;
fclose(file);
goto just_return;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
if (mac_add_type(name, labels) == -1) {
if (ignore_errors)
continue;
fclose(file);
goto just_return;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
} else if (strcmp(statement, "default_ifnet_labels") == 0 ||
strcmp(statement, "default_file_labels") == 0 ||
strcmp(statement, "default_process_labels") == 0) {
char *labels, *type;
if (strcmp(statement, "default_ifnet_labels") == 0)
type = "ifnet";
else if (strcmp(statement, "default_file_labels") == 0)
type = "file";
else if (strcmp(statement, "default_process_labels") ==
0)
type = "process";
labels = next_token(&parse);
if (labels == NULL || next_token(&parse) != NULL) {
if (ignore_errors)
continue;
error = EINVAL;
fclose(file);
goto just_return;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
if (mac_add_type(type, labels) == -1) {
if (ignore_errors)
continue;
fclose(file);
goto just_return;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
} else {
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
if (ignore_errors)
continue;
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
fclose(file);
error = EINVAL;
goto just_return;
}
}
fclose(file);
internal_initialized = 1;
just_return:
if (error != 0)
mac_destroy_internal();
return (error);
}
static int
mac_maybe_init_internal(void)
{
if (!internal_initialized)
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
return (mac_init_internal(1));
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
else
return (0);
}
int
mac_reload(void)
{
if (internal_initialized)
mac_destroy_internal();
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
return (mac_init_internal(0));
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
int
mac_free(struct mac *mac)
{
if (mac->m_string != NULL)
free(mac->m_string);
free(mac);
return (0);
}
int
mac_from_text(struct mac **mac, const char *text)
{
*mac = (struct mac *) malloc(sizeof(**mac));
if (*mac == NULL)
return (ENOMEM);
(*mac)->m_string = strdup(text);
if ((*mac)->m_string == NULL) {
free(*mac);
*mac = NULL;
return (ENOMEM);
}
(*mac)->m_buflen = strlen((*mac)->m_string)+1;
return (0);
}
Place mac_prepare() with the other mac_prepare*() functions.
2002-10-24 01:16:56 +00:00
int
mac_to_text(struct mac *mac, char **text)
{
*text = strdup(mac->m_string);
if (*text == NULL)
return (ENOMEM);
return (0);
}
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
int
Make the elements argument to mac_prepare() be const. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:49:59 +00:00
mac_prepare(struct mac **mac, const char *elements)
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
{
if (strlen(elements) >= MAC_MAX_LABEL_BUF_LEN)
return (EINVAL);
*mac = (struct mac *) malloc(sizeof(**mac));
if (*mac == NULL)
return (ENOMEM);
(*mac)->m_string = malloc(MAC_MAX_LABEL_BUF_LEN);
if ((*mac)->m_string == NULL) {
free(*mac);
*mac = NULL;
return (ENOMEM);
}
strcpy((*mac)->m_string, elements);
(*mac)->m_buflen = MAC_MAX_LABEL_BUF_LEN;
return (0);
}
int
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
mac_prepare_type(struct mac **mac, const char *name)
{
struct label_default *ld;
/etc/mac.conf is implicitly read and parsed when the MAC configuration is accessed for the first time as a result of an application looking up label configuration information. Previously, the check and read were kicked off by mac_prepare_(typename)() functions; since mac_prepare_type() may now be directly employed by a user process, push the check and initialization into that function. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-11-15 03:34:58 +00:00
int error;
error = mac_maybe_init_internal();
if (error != 0)
return (error);
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
for (ld = LIST_FIRST(&label_default_head); ld != NULL;
ld = LIST_NEXT(ld, ld_entries)) {
if (strcmp(name, ld->ld_name) == 0)
return (mac_prepare(mac, ld->ld_labels));
}
Return (-1) not (ENOENT) for mac_prepare_type(), and set errno to ENOENT instead. Reported by: "Kenneth D. Merry" <ken@kdm.org> Submitted by: Bryan Liesner <bleez@comcast.net>
2003-08-30 14:51:01 +00:00
errno = ENOENT;
return (-1); /* XXXMAC: ENOLABEL */
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
}
int
mac_prepare_ifnet_label(struct mac **mac)
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
{
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
return (mac_prepare_type(mac, "ifnet"));
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
int
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
mac_prepare_file_label(struct mac **mac)
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
{
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
return (mac_prepare_type(mac, "file"));
}
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
int
mac_prepare_packet_label(struct mac **mac)
{
return (mac_prepare_type(mac, "packet"));
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
int
mac_prepare_process_label(struct mac **mac)
{
As new objects begin to support new labels, start to generalize the default label support in /etc/mac.conf. Rather than maintain each default label type in an explicit global variable in mac.c, keep a list of defaults loaded from the configuration file. Generalize the parsing so that we support both the older: default_file_labels foo default_ifnet_labels foo default_process_labels foo And also a new: default_labels file foo default_labels ifnet foo default_labels process foo We now accept arbitrary object classes in the first argument. If the same object is specified more than once, we discard the earlier definition in favor of the later one. Add a new API, mac_prepare_type(), which accepts a mac_t to prepare, as well as an object name in the second argument, which will pull a default label set for the object out of the configuration loaded by mac_init_internal(). This permits the libc to adapt to new objects known about by applications but not by libc at compile-time. Also liberalize the error handling a bit: if we're using implicit initialization (i.e., the application didn't explicitly initialize the MAC code), ignore syntax errors and only use valid lines. In the future, we may want to add explicit warnings and do this a bit more consistently. While here, add support for a MAC_CONFFILE environmental variable, which may be used to specify an alternative mac.conf configuration file if the application isn't running with modified privilege (issetugid()). Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2003-08-22 17:36:23 +00:00
return (mac_prepare_type(mac, "process"));
Reflect MAC kernel/user API changes into the libc MAC implementation. This removes a lot of complexity, since we basically just reserve space on a retrieval of a label, and pass around strings. Two new elements: (1) consumers of the API must now declare what label elements they are interested in retrieving, or (2) rely on the default provided in a new configuration file, mac.conf. Approved by: re Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-22 14:36:11 +00:00
}
/*
* Simply test whether the TrustedBSD/MAC MIB tree is present; if so,
* return 1 to indicate that the system has MAC enabled overall or for
* a given policy.
*/
int
mac_is_present(const char *policyname)
{
int mib[5];
size_t siz;
char *mibname;
int error;
if (policyname != NULL) {
if (policyname[strcspn(policyname, ".=")] != '\0') {
errno = EINVAL;
return (-1);
}
mibname = malloc(sizeof("security.mac.") - 1 +
strlen(policyname) + sizeof(".enabled"));
if (mibname == NULL)
return (-1);
strcpy(mibname, "security.mac.");
strcat(mibname, policyname);
strcat(mibname, ".enabled");
siz = 5;
error = sysctlnametomib(mibname, mib, &siz);
free(mibname);
} else {
siz = 3;
error = sysctlnametomib("security.mac", mib, &siz);
}
if (error == -1) {
switch (errno) {
case ENOTDIR:
case ENOENT:
return (0);
default:
return (error);
}
}
return (1);
}
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