The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/security/mac/mac_priv.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2006 nCircle Network Security, Inc.
    3  * Copyright (c) 2009 Robert N. M. Watson
    4  * All rights reserved.
    5  *
    6  * This software was developed by Robert N. M. Watson for the TrustedBSD
    7  * Project under contract to nCircle Network Security, Inc.
    8  *
    9  * This software was developed at the University of Cambridge Computer
   10  * Laboratory with support from a grant from Google, Inc.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
   25  * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   27  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   28  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   29  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   30  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * MAC checks for system privileges.
   36  */
   37 
   38 #include "sys/cdefs.h"
   39 __FBSDID("$FreeBSD$");
   40 
   41 #include "opt_mac.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/kernel.h>
   45 #include <sys/priv.h>
   46 #include <sys/sdt.h>
   47 #include <sys/module.h>
   48 
   49 #include <security/mac/mac_framework.h>
   50 #include <security/mac/mac_internal.h>
   51 #include <security/mac/mac_policy.h>
   52 
   53 /*
   54  * The MAC Framework interacts with kernel privilege checks in two ways: it
   55  * may restrict the granting of privilege to a subject, and it may grant
   56  * additional privileges to the subject.  Policies may implement none, one,
   57  * or both of these entry points.  Restriction of privilege by any policy
   58  * always overrides granting of privilege by any policy or other privilege
   59  * mechanism.  See kern_priv.c:priv_check_cred() for details of the
   60  * composition.
   61  */
   62 
   63 MAC_CHECK_PROBE_DEFINE2(priv_check, "struct ucred *", "int");
   64 
   65 /*
   66  * Restrict access to a privilege for a credential.  Return failure if any
   67  * policy denies access.
   68  */
   69 int
   70 mac_priv_check_impl(struct ucred *cred, int priv)
   71 {
   72         int error;
   73 
   74         MAC_POLICY_CHECK_NOSLEEP(priv_check, cred, priv);
   75         MAC_CHECK_PROBE2(priv_check, error, cred, priv);
   76 
   77         return (error);
   78 }
   79 
   80 MAC_GRANT_PROBE_DEFINE2(priv_grant, "struct ucred *", "int");
   81 
   82 /*
   83  * Grant access to a privilege for a credential.  Return success if any
   84  * policy grants access.
   85  */
   86 int
   87 mac_priv_grant_impl(struct ucred *cred, int priv)
   88 {
   89         int error;
   90 
   91         MAC_POLICY_GRANT_NOSLEEP(priv_grant, cred, priv);
   92         MAC_GRANT_PROBE2(priv_grant, error, cred, priv);
   93 
   94         return (error);
   95 }

Cache object: 87e6b49a9b347eb1e6715dba45b41251


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.