Kali linux arm установка

Kali linux arm установка

Although you can download pre-rolled Kali ARM images from our download area, there may be applications which will require building your own custom bootstrapped Kali rootfs for ARM.

The following procedure shows an example of building a fairly generic Kali armhf rootfs. If you wish to build for armel, use that value rather than “armhf” when you export the architecture environment variable.

You’ll need to have root privileges to do this procedure, or the ability to escalate your privileges with the command “sudo su”.

Some Notes on This Procedure

The intention in this article is more to provide a high-level overview of how the build scripts work than an actual manual procedure (although it’s completely possible to walk through this example at the command line). The style mimics that used in the build scripts used to create the pre-rolled images. Specifically, you’ll see a construct in several places that looks like:

[email protected]:~$ cat kali-$architecture/etc/apt/sources.list deb http://http.kali.org/kali kali-rolling main contrib non-free non-free-firmware EOF 

This simply amounts to creating a new file, ~/arm-stuff/rootfs/kali-armhf/etc/apt/sources.list , with the contents:

Real-World Custom Kali Linux Builds for ARM Devices

Before we walk through our example, it’s probably good to see how a custom ARM build would actually be accomplished. Typically, to do a local build of an image for, e.g., Raspberry Pi, the process would be something like the following. As an initial one-time set-up, clone the ARM build scripts repository on GitHub and install the build prerequisites:

[email protected]:~$ cd ~/ [email protected]:~$ git clone https://gitlab.com/kalilinux/build-scripts/kali-arm.git [email protected]:~$ dpkg --add-architecture i386 [email protected]:~$ sudo apt update [email protected]:~$ sudo apt install -y debootstrap qemu-user-static device-tree-compiler lzma lzop u-boot-tools libncurses5:i386 pixz 

To do an ARM build, you must enable cross-compilation for your current shell session:

[email protected]:~$ export ARCH=arm [email protected]:~$ mkdir -p ~/arm-stuff/kernel/toolchains/ [email protected]:~$ cd ~/arm-stuff/kernel/toolchains/ [email protected]:~$ git clone git://gitlab.com/kalilinux/packages/gcc-arm-eabi-linaro-4-6-2.git [email protected]:~$ export CROSS_COMPILE=~/arm-stuff/kernel/toolchains/gcc-arm-eabi-linaro-4.6.2/bin/arm-eabi- 

Then simply invoke the build script for the specific platform. So, for a Raspberry Pi build of Kali Linux 2016.2, execute the commands:

[email protected]:~$ cd ~/ [email protected]:~$ kali-arm-build-scripts/rpi.sh 2016.2 

The ARM build scripts are all completely self-contained, aside from the initial one-time installation of the build prerequisites. The first time you run one of the ARM build scripts, it is extremely important that you inspect the output for any errors such as missing tools, etc., correct them, and then re-run the script until you get a clean build. Only at that point can you go ahead to make any customizations you want to the basic build script to create the specific “recipe” you’re after.

It’s possible to speed up your builds by caching the packages you download using apt-cacher-ng, as described in the previous article. Note that this can break some of the standard build scripts unless you uncomment certain lines before building — they’re noted in the scripts themselves. If you’re using apt-cacher-ng, make sure you check your scripts for any necessary changes.

For reliable and predictable results, build your Kali Linix ARM chroot from within a pre-existing and up-to-date Kali Linux environment. This guide assumes that you have already set up your ARM cross-compilation environment.

An Annotated Example of a Generic ARM Build of Kali Linux

The build described here is both minimal and generic. A small number of basic packages are included, and the fuller configuration needed for a real-world platform is omitted for the sake of clarity. Use this example as a reference for understanding what’s going on in the official ARM build scripts and as a high-level guide for writing your own build scripts. It can be successfully followed as a stand-alone tutorial from the command line, but the image produced is not likely to run on any particular device. Use the pre-rolled build scripts, either as-is or with your own customizations, to produce working images for concrete hardware.

Install Required Tools and Dependencies

This is a general set-up task, and should only ever need to be done once:

[email protected]:~$ sudo apt install -y debootstrap qemu-user-static 

Enable Cross-Compilation

In order to enable the Linaro cross-compilation, you will need to set these environment variable at the beginning of every session:

[email protected]:~$ export ARCH=arm [email protected]:~$ export CROSS_COMPILE=~/arm-stuff/kernel/toolchains/gcc-arm-eabi-linaro-4.6.2/bin/arm-eabi- 

Define Architecture and Custom Packages

This is where you define some environment variables for your required ARM architecture (armel vs armhf) and list the packages to be installed in your image. These will be used throughout this article, so make sure to modify them to your needs:

[email protected]:~$ export packages="xfce4 kali-menu wpasupplicant kali-defaults initramfs-tools u-boot-tools nmap openssh-server" [email protected]:~$ export architecture="armhf" 

Build the Kali rootfs

Set Up the Base rootfs

As our starting point, we’ll create a standard directory structure and use debootstrap to install a base ARM rootfs from the Kali Linux repositories. We then copy over qemu-arm-static, an ARM emulator, from our host machine into the rootfs in order to initiate the 2nd stage chroot:

[email protected]:~$ mkdir -p ~/arm-stuff/kernel # should have already been created when setting up x-compilation [email protected]:~$ mkdir -p ~/arm-stuff/rootfs [email protected]:~$ cd ~/arm-stuff/rootfs/ [email protected]:~$ [email protected]:~$ debootstrap --foreign --arch $architecture kali-rolling kali-$architecture http://http.kali.org/kali [email protected]:~$ cp /usr/bin/qemu-arm-static kali-$architecture/usr/bin/ 

2nd Stage chroot

First, we’ll chroot into our newly-created base rootfs, use debootstrap a second time to construct our second-stage rootfs, and configure base image settings such as repositories (in /etc/apt/sources.list ), host name (in /etc/hostname ), default network interfaces and behavior (in /etc/network/interfaces and /etc/resolv.conf ), etc. Change these to suit your requirements:

[email protected]:~$ cd ~/arm-stuff/rootfs/ [email protected]:~$ LANG=C chroot kali-$architecture /debootstrap/debootstrap --second-stage [email protected]:~$ cat kali-$architecture/etc/apt/sources.list deb http://http.kali.org/kali kali-rolling main contrib non-free non-free-firmware EOF [email protected]:~$ [email protected]:~$ echo "kali" > kali-$architecture/etc/hostname [email protected]:~$ [email protected]:~$ cat kali-$architecture/etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp EOF [email protected]:~$ [email protected]:~$ cat kali-$architecture/etc/resolv.conf nameserver 8.8.8.8 EOF 

Now, we’re ready to assemble our third-stage chroot.

3rd Stage chroot

This is where your specific customizations come in. Your $packages list is installed, as are keymaps, a default kali user password of “kali” is set, and other configuration changes and fixes are applied:

[email protected]:~$ export MALLOC_CHECK_=0 # workaround for LP: #520465 [email protected]:~$ export LC_ALL=C [email protected]:~$ export DEBIAN_FRONTEND=noninteractive [email protected]:~$ [email protected]:~$ mount -t proc proc kali-$architecture/proc [email protected]:~$ mount -o bind /dev/ kali-$architecture/dev/ [email protected]:~$ mount -o bind /dev/pts kali-$architecture/dev/pts [email protected]:~$ [email protected]:~$ cat kali-$architecture/debconf.set console-common console-data/keymap/policy select Select keymap from full list console-common console-data/keymap/full select en-latin1-nodeadkeys EOF 

Here, we’ll create the script to do the third-stage chroot

[email protected]:~$ cat kali-$architecture/third-stage #!/bin/sh dpkg-divert --add --local --divert /usr/sbin/invoke-rc.d.chroot --rename /usr/sbin/invoke-rc.d cp /bin/true /usr/sbin/invoke-rc.d apt-get update apt-get install -y locales-all #locale-gen en_US.UTF-8 debconf-set-selections /debconf.set rm -f /debconf.set apt-get update apt-get install -y locales-all apt-get install -y git-core binutils ca-certificates initramfs-tools u-boot-tools apt-get install -y locales console-common less vim git echo "kali:kali" | chpasswd sed -i -e 's/KERNEL\!=\"eth\*|/KERNEL\!=\"/' /lib/udev/rules.d/75-persistent-net-generator.rules rm -f /etc/udev/rules.d/70-persistent-net.rules apt-get install -y --force-yes $ rm -f /usr/sbin/invoke-rc.d dpkg-divert --remove --rename /usr/sbin/invoke-rc.d rm -f /third-stage EOF 

Now, we’ll run it from within our second-stage chroot:

[email protected]:~$ chmod +x kali-$architecture/third-stage [email protected]:~$ LANG=C chroot kali-$architecture /third-stage 

Manual Configuration Within the chroot

If you need to make any further modifications in your rootfs environment, you can do so by manually chrooting into it with the following command and making any needed changes:

[email protected]:~$ LANG=C chroot kali-$architecture 

Once you’ve completed your modifications, leave the chroot’ed rootfs with the command

Cleanup

Lastly, we create and run a cleanup script in our chroot to free up space used by cached files and run any other cleanup jobs we may require, and unmount the directories we were using in our rootfs:

[email protected]:~$ cat kali-$architecture/cleanup #!/bin/sh rm -rf /root/.bash_history apt-get update apt-get clean rm -f cleanup EOF [email protected]:~$ [email protected]:~$ chmod +x kali-$architecture/cleanup [email protected]:~$ LANG=C chroot kali-$architecture /cleanup [email protected]:~$ [email protected]:~$ umount kali-$architecture/proc [email protected]:~$ umount kali-$architecture/dev/pts [email protected]:~$ umount kali-$architecture/dev/ [email protected]:~$ [email protected]:~$ cd ../ 

Congratulations! Your custom Kali ARM rootfs is located in the ~/arm-stuff/rootfs/kali-$architecture directory. You can now tar up this directory or convert it to an image file for further work.

Updated on: 2023-Mar-06
Author: steev

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