From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <48C205F1.1030901@redhat.com> Date: Sat, 06 Sep 2008 14:24:17 +1000 From: Murray McAllister MIME-Version: 1.0 To: Stephen Smalley CC: SE Linux Subject: Re: user guide draft: "SELinux Contexts and Attributes" review References: <48B4FA3E.3000602@redhat.com> <1219844836.5708.92.camel@moss-spartans.epoch.ncsc.mil> <48BB93D2.8090909@redhat.com> <48BCB564.4010404@redhat.com> <1220360985.26711.43.camel@moss-spartans.epoch.ncsc.mil> <48BE28D5.1080902@redhat.com> <1220446886.6034.33.camel@moss-spartans.epoch.ncsc.mil> <48C0C7C3.3050304@redhat.com> <1220614047.17197.277.camel@moss-spartans.epoch.ncsc.mil> In-Reply-To: <1220614047.17197.277.camel@moss-spartans.epoch.ncsc.mil> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: owner-selinux@tycho.nsa.gov List-Id: selinux@tycho.nsa.gov Stephen Smalley wrote: > On Fri, 2008-09-05 at 15:46 +1000, Murray McAllister wrote: >> Stephen Smalley wrote: >>> On Wed, 2008-09-03 at 16:04 +1000, Murray McAllister wrote: >>>> How about: >>>> >>>> The level is an attribute of MLS and Multi-Category Security (MCS). The >>>> first part of the level, s0-s0, is the sensitivity. >>> Actually, s0-s0 is a MLS range where the low level has sensitivity s0 >>> and no categories and the high level has sensitivity s0 and no >>> categories. >>> >>>> The s0 sensitivity >>>> is the only sensitivity used for MCS. Since the format of the level is >>>> the same for MLS and MCS, and MLS supports ranges of sensitivities, a >>>> sensitivity such as s0-s0 is the same as s0 when using MCS. >>> No, s0-s0 is always the same as just s0, regardless of MCS or MLS. Just >>> like s1-s1 is the same as just s1. Versus a non-trivial range like >>> s0-s1 or s0-s3. >>> >>>> Optionally, >>>> the level can have a list of categories. >> I hope this is correct soon ;) >> >> The level is an attribute of MLS and Multi-Category Security (MCS). The >> first part of the level, s0-s0, is an MLS range. > > s0-s0 is a range. It is not a level. A MLS range is a pair of levels > (lowlevel, highlevel) written as "lowlevel-highlevel" if they differ or > as just "lowlevel" if they are the identical. Each level is a > (sensitivity, categoryset) pair written as "sensitivity:categoryset" or > just "sensitivity" if the category set is empty. A categoryset is a > list of categories written as "category1,category2,...". If a category > set contains a contiguous series of categories (e.g. > "c1,c2,c3,c4,c5,c6,c7,c8,c9,c10") this can be abbreviated as the first > category in the series followed by a dot (".") followed by the last > category in the series, e.g. "c1.c10". > > s0-s0 is a range where the lowlevel == highlevel == (sensitivity s0, > emptycategoryset). > If it is not right this time, it's being deleted ;) level: The level[1] is an attribute of MLS and Multi-Category Security (MCS). An MLS range is a pair of levels, written as lowlevel-highlevel if the levels differ, or lowlevel if the levels are identical (s0-s0 is the same as s0). Each level is a sensitivity-category pair, with categories being optional. If there are categories, the level is written as sensitivity:category-set. If there are no categories, it is written as sensitivity. If the category set is a contiguous series, it can be abbreviated. For example, c0.c3 is the same as c0,c1,c2,c3. The /etc/selinux/targeted/setrans.conf file is used to map levels (s0:c0) to human-readable form (CompanyConfidential). [1] talking about all of the output (s0-s0:c0.c1023 ) from semanage login -l -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with the words "unsubscribe selinux" without quotes as the message.