a203c58900
kernel access control. Extensions to libc to provide basic MAC label manipulation facilities for userland. These interface will be replaced in the next month or two with more flexible interfaces, but provide sufficient support to allow use of the Biba and MLS policies for user applications. libc_r wrappers to follow. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*-
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by NAI Labs, the
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* Security Research Division of Network Associates, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
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* CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/sysctl.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* Simply test whether the TrustedBSD/MAC MIB tree is present; if so,
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* return 1 to indicate that the system has MAC enabled overall or for
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* a given policy.
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*/
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int
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mac_is_present_np(const char *policyname)
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{
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int mib[5];
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size_t siz;
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char *mibname;
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int error;
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if (policyname != NULL) {
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if (policyname[strcspn(policyname, ".=")] != '\0') {
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errno = EINVAL;
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return (-1);
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}
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mibname = malloc(sizeof("security.mac.") - 1 +
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strlen(policyname) + sizeof(".enabled"));
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if (mibname == NULL)
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return (-1);
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strcpy(mibname, "security.mac.");
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strcat(mibname, policyname);
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strcat(mibname, ".enabled");
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siz = 5;
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error = sysctlnametomib(mibname, mib, &siz);
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free(mibname);
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} else {
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siz = 3;
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error = sysctlnametomib("security.mac", mib, &siz);
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}
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if (error == -1) {
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switch (errno) {
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case ENOTDIR:
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case ENOENT:
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return (0);
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default:
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return (error);
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}
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}
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return (1);
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}
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