Tomoyo Linux
This articleneeds additional citations forverification.(September 2010) |
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![]() Tomoyo Linux 2.x Domain Policy Editor | |
Original author(s) | NTT Data Corporation |
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Repository | |
Operating system | Linux |
Type | Mandatory access control |
License | GPLv2 |
Website | tomoyo |
Tomoyo Linux(stylised asTOMOYO Linux) is aLinux kernelsecurity modulewhich implementsmandatory access control(MAC).
Overview
[edit]Tomoyo Linux is a MAC implementation forLinuxthat can be used to increase the security of a system, while also being useful purely as asystems analysistool. It was launched in March 2003 and was sponsored byNTT Data Corporationuntil March 2012.[1]
Tomoyo Linux focuses on system behaviour. Tomoyo Linux allows each process to declare behaviours and resources needed to achieve their purpose. When protection is enabled, Tomoyo Linux restricts each process to the behaviours and resources allowed by the administrator.
Features
[edit]The main features of Tomoyo Linux include:
- System analysis
- Increased security through Mandatory Access Control
- Automatic policy generation
- Simple syntax
- Ease of use
History and versions
[edit]Tomoyo was merged inLinux Kernelmainline version 2.6.30 (2009, June 10)/[2]It is currently one of four standardLinux Security Modules(LSM), along withSELinux,AppArmorandSMACK.
The Tomoyo Linux project started as a patch for the Linux kernel to provide MAC. Porting Tomoyo Linux to the mainline Linux kernel required the introduction of hooks[3]into the LSM that had been designed and developed specifically to support SELinux and its label-based approach.
However, more hooks are needed to integrate the remaining MAC functionality of Tomoyo Linux. Consequently, the project is following two parallel development lines:
Tomoyo Linux 1.x,original version
- uses purposely created non-standard hooks
- fully featured MAC
- released as a patch for Linux kernel – Since this version 1.x does not depend on LSM, it can be used with Linux kernel 2.6 (starting from version 2.6.11) as well as 2.4.
- latest version: 1.7.1
Tomoyo Linux 2.x,mainline version
- uses standardLSMhooks
- fewer features
- integral part of Linux kernel version 2.6.30
- latest version: 2.5.0 included in Linux kernel 3.2
Akari(stylised asAKARI), Tomoyo 1.x fork
- uses standardLSMhooks
- fewer features than Tomoyo 1.x, but more than Tomoyo 2.x
- released asLKM(Loadable Kernel Module), sono recompilation of the kernel is necessary
Naming
[edit]The name 'TOMOYO' is, officially speaking, abackronymfor "Task Oriented Management Obviates Your Onus". According to one of the developers Tetsuo Handa, it's also a reference to the character Tomoyo Daidouji fromCardcaptor Sakura.[4]
References
[edit]- ^"Tomoyo Linux Home Page".Tomoyo.osdn.jp.Retrieved2013-05-23.
- ^"Tomoyo Linux, an alternative Mandatory Access Control".Linux 2 6 30.Linux Kernel Newbies.
- ^"Tomoyo #14 patch submission to LKML".LWN.net.
- ^"QandA - TOMOYO Linux Wiki".Archived fromthe originalon 2015-12-25.