1/* 2 * Copyright (c) 2010 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/*- 29 * Copyright (c) 2006 nCircle Network Security, Inc. 30 * Copyright (c) 2009 Robert N. M. Watson 31 * All rights reserved. 32 * 33 * This software was developed by Robert N. M. Watson for the TrustedBSD 34 * Project under contract to nCircle Network Security, Inc. 35 * 36 * This software was developed at the University of Cambridge Computer 37 * Laboratory with support from a grant from Google, Inc. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY, 52 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 53 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 54 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 55 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 56 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 57 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 58 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 59 */ 60 61/* 62 * MAC checks for system privileges. 63 */ 64 65#include <sys/param.h> 66#include <sys/kernel.h> 67 68#include <security/mac_internal.h> 69 70/* 71 * The MAC Framework interacts with kernel privilege checks in two ways: it 72 * may restrict the granting of privilege to a subject, and it may grant 73 * additional privileges to the subject. Policies may implement none, one, 74 * or both of these entry points. Restriction of privilege by any policy 75 * always overrides granting of privilege by any policy or other privilege 76 * mechanism. See kern_priv.c:priv_check_cred() for details of the 77 * composition. 78 */ 79 80/* 81 * Restrict access to a privilege for a credential. Return failure if any 82 * policy denies access. 83 */ 84int 85mac_priv_check(kauth_cred_t cred, int priv) 86{ 87 int error; 88 89 MAC_CHECK(priv_check, cred, priv); 90 91 return (error); 92} 93 94/* 95 * Grant access to a privilege for a credential. Return success if any 96 * policy grants access. 97 */ 98int 99mac_priv_grant(kauth_cred_t cred, int priv) 100{ 101 int error; 102 103 MAC_GRANT(priv_grant, cred, priv); 104 105 return (error); 106} 107