Merge pull request #65 from mvallim/feature/secure-boot
Support built image to boot with secure boot enabled.
This commit is contained in:
Marcos Tischer Vallim
GitHub
commit
fe1f1fdfa6
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@ -9,7 +9,7 @@ on:
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jobs:
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build:
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runs-on: ubuntu-20.04
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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@ -9,7 +9,7 @@ on:
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jobs:
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build:
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runs-on: ubuntu-20.04
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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@ -9,7 +9,7 @@ on:
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jobs:
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build:
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runs-on: ubuntu-22.04
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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@ -0,0 +1,29 @@
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name: build-noble
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on:
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push:
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branches: [ master ]
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pull_request:
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branches: [ master ]
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workflow_dispatch:
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jobs:
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build:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- name: Build
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run: |
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cd scripts
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sed -i -E 's/TARGET_UBUNTU_VERSION=(.*)/TARGET_UBUNTU_VERSION="noble"/g' default_config.sh
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./build.sh -
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cd ..
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- name: Archive artifacts
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uses: actions/upload-artifact@v3
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with:
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name: ubuntu-from-scratch
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path: |
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scripts/ubuntu-from-scratch.iso
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scripts/image/md5sum.txt
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@ -1,3 +1,4 @@
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scripts/chroot
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scripts/image
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scripts/certificates
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*.iso
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@ -1,4 +1,7 @@
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Marcos Vallim <tischer@gmail.com>
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Ken Gilmer <kgilmer@gmail.com>
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Marcos Vallim <tischer@gmail.com> - mvallim
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Ken Gilmer <kgilmer@gmail.com> - kgilmer
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Anduin Xue <anduin@aiursoft.com> - Anduin2017
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Andreas Blaesius <andi@unlegacy-android.org> - andi34
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Andre Julius <> - NotNorom
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sostela <>
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monkey-jsun <>
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Andreas Blaesius <andi@unlegacy-android.org>
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526
README.md
526
README.md
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@ -21,6 +21,8 @@ See also the list of [contributors](CONTRIBUTORS.txt) who participated in this p
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[](https://github.com/mvallim/live-custom-ubuntu-from-scratch/actions/workflows/build-bionic.yml)
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[](https://github.com/mvallim/live-custom-ubuntu-from-scratch/actions/workflows/build-focal.yml)
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[](https://github.com/mvallim/live-custom-ubuntu-from-scratch/actions/workflows/build-jammy.yml)
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[](https://github.com/mvallim/live-custom-ubuntu-from-scratch/actions/workflows/build-noble.yml)
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## Terms
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@ -34,13 +36,9 @@ Install packages we need in the `build system` required by our scripts.
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```shell
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sudo apt-get install \
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binutils \
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debootstrap \
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squashfs-tools \
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xorriso \
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grub-pc-bin \
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grub-efi-amd64-bin \
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mtools
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xorriso
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```
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```shell
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@ -57,7 +55,7 @@ mkdir $HOME/live-ubuntu-from-scratch
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sudo debootstrap \
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--arch=amd64 \
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--variant=minbase \
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focal \
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noble \
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$HOME/live-ubuntu-from-scratch/chroot \
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http://us.archive.ubuntu.com/ubuntu/
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```
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@ -78,7 +76,7 @@ mkdir $HOME/live-ubuntu-from-scratch
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*A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally cannot access) files outside the designated directory tree. The term "chroot" may refer to the chroot system call or the chroot wrapper program. The modified environment is called a chroot jail.*
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> Reference: https://en.wikipedia.org/wiki/Chroot
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> Reference: <https://en.wikipedia.org/wiki/Chroot>
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From this point we will be configuring the `live system`.
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@ -170,12 +168,10 @@ From this point we will be configuring the `live system`.
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sudo \
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ubuntu-standard \
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casper \
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lupin-casper \
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discover \
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laptop-detect \
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os-prober \
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network-manager \
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resolvconf \
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net-tools \
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wireless-tools \
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wpagui \
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@ -184,7 +180,12 @@ From this point we will be configuring the `live system`.
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grub-gfxpayload-lists \
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grub-pc \
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grub-pc-bin \
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grub2-common
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grub2-common \
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grub-efi-amd64-signed \
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shim-signed \
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memtest86+ \
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mtools \
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binutils
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```
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```shell
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@ -327,118 +328,50 @@ From this point we will be configuring the `live system`.
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<img src="images/locales-default.png">
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</p>
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2. Reconfigure resolvconf
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```shell
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dpkg-reconfigure resolvconf
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```
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1. *Confirm changes*
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<p align="center">
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<img src="images/resolvconf-confirm-01.png">
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</p>
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<p align="center">
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<img src="images/resolvconf-confirm-02.png">
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</p>
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<p align="center">
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<img src="images/resolvconf-confirm-03.png">
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</p>
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3. Configure network-manager
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2. Configure network-manager
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```shell
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cat <<EOF > /etc/NetworkManager/NetworkManager.conf
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[main]
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rc-manager=resolvconf
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rc-manager=none
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plugins=ifupdown,keyfile
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dns=dnsmasq
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dns=systemd-resolved
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[ifupdown]
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managed=false
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EOF
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```
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4. Reconfigure network-manager
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3. Reconfigure network-manager
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```shell
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dpkg-reconfigure network-manager
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```
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19. **Cleanup the chroot environment**
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1. If you installed software, be sure to run
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```shell
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truncate -s 0 /etc/machine-id
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```
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2. Remove the diversion
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```shell
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rm /sbin/initctl
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dpkg-divert --rename --remove /sbin/initctl
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```
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3. Clean up
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```shell
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apt-get clean
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rm -rf /tmp/* ~/.bash_history
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umount /proc
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umount /sys
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umount /dev/pts
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export HISTSIZE=0
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exit
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```
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## Unbind mount points
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```shell
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sudo umount $HOME/live-ubuntu-from-scratch/chroot/dev
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sudo umount $HOME/live-ubuntu-from-scratch/chroot/run
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```
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## Create the CD image directory and populate it
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We are now back in our `build environment` after setting up our `live system` and will continue creating files necessary to generate the ISO.
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1. Access build directory
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1. Create directories
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```shell
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cd $HOME/live-ubuntu-from-scratch
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mkdir -p /image/{casper,isolinux,install}
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```
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2. Create directories
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2. Copy kernel images
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```shell
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mkdir -p image/{casper,isolinux,install}
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cp /boot/vmlinuz-**-**-generic image/casper/vmlinuz
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cp /boot/initrd.img-**-**-generic image/casper/initrd
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```
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3. Copy kernel images
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3. Copy memtest86+ binary (BIOS)
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```shell
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sudo cp chroot/boot/vmlinuz-**-**-generic image/casper/vmlinuz
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sudo cp chroot/boot/initrd.img-**-**-generic image/casper/initrd
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cp /boot/memtest86+.bin image/install/memtest86+
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```
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4. Copy memtest86+ binary (BIOS)
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```shell
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sudo cp chroot/boot/memtest86+.bin image/install/memtest86+
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```
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5. Download and extract memtest86 binary (UEFI)
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4. Download and extract memtest86 binary (UEFI)
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```shell
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wget --progress=dot https://www.memtest86.com/downloads/memtest86-usb.zip -O image/install/memtest86-usb.zip
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@ -450,19 +383,13 @@ We are now back in our `build environment` after setting up our `live system` an
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## GRUB menu configuration
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1. Access build directory
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```shell
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cd $HOME/live-ubuntu-from-scratch
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```
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2. Create base point access file for grub
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1. Create base point access file for grub
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```shell
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touch image/ubuntu
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```
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3. Create image/isolinux/grub.cfg
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2. Create image/isolinux/grub.cfg
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```shell
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cat <<EOF > image/isolinux/grub.cfg
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@ -508,28 +435,303 @@ We are now back in our `build environment` after setting up our `live system` an
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Next we create a file `filesystem.manifest` to specify each package and it's version that is installed on the `live system`. We create another file `filesystem.manifest-desktop` which specifies which files will be installed on the `target system`. Once the Ubiquity installer completes, it will
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remove packages specified in `filesystem.manifest` that are *not* listed in `filesystem.manifest-desktop`.
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1. Access build directory
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1. Generate manifest
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```shell
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cd $HOME/live-ubuntu-from-scratch
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dpkg-query -W --showformat='${Package} ${Version}\n' | sudo tee /image/casper/filesystem.manifest
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cp -v /image/casper/filesystem.manifest image/casper/filesystem.manifest-desktop
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sed -i '/ubiquity/d' /image/casper/filesystem.manifest-desktop
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sed -i '/casper/d' /image/casper/filesystem.manifest-desktop
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sed -i '/discover/d' /image/casper/filesystem.manifest-desktop
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sed -i '/laptop-detect/d' /image/casper/filesystem.manifest-desktop
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sed -i '/os-prober/d' /image/casper/filesystem.manifest-desktop
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```
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2. Generate manifest
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## Create diskdefines
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**README** file often found on Linux LiveCD installer discs, such as an Ubuntu Linux installation CD; typically named “**README.diskdefines**” and may be referenced during installation.
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1. Create file /image/README.diskdefines
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```shell
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sudo chroot chroot dpkg-query -W --showformat='${Package} ${Version}\n' | sudo tee image/casper/filesystem.manifest
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cat <<EOF > /image/README.diskdefines
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#define DISKNAME Ubuntu from scratch
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#define TYPE binary
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#define TYPEbinary 1
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#define ARCH amd64
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#define ARCHamd64 1
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#define DISKNUM 1
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#define DISKNUM1 1
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#define TOTALNUM 0
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#define TOTALNUM0 1
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EOF
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```
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sudo cp -v image/casper/filesystem.manifest image/casper/filesystem.manifest-desktop
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### Creating the certificates to Secure Boot
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sudo sed -i '/ubiquity/d' image/casper/filesystem.manifest-desktop
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1. Create the certificate template
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sudo sed -i '/casper/d' image/casper/filesystem.manifest-desktop
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```shell
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mkdir /certificates
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```
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sudo sed -i '/discover/d' image/casper/filesystem.manifest-desktop
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```shell
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cd /certificates
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```
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sudo sed -i '/laptop-detect/d' image/casper/filesystem.manifest-desktop
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```shell
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cat <<EOF > config.conf
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[ req ]
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default_bits = 2048
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default_md = sha256
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distinguished_name = dn
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prompt = no
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sudo sed -i '/os-prober/d' image/casper/filesystem.manifest-desktop
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[ dn ]
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C = BR
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ST = SP
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L = Campinas
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O = Scratch, Labs
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OU = Labs
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CN = \${ENV::CN}
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[ root ]
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basicConstraints = critical,CA:TRUE
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subjectKeyIdentifier = hash
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authorityKeyIdentifier = keyid:always,issuer
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keyUsage = critical,digitalSignature,keyEncipherment,keyCertSign,cRLSign
|
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|
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[ ca ]
|
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basicConstraints = critical,CA:TRUE,pathlen:0
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subjectKeyIdentifier = hash
|
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authorityKeyIdentifier = keyid:always,issuer:always
|
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keyUsage = critical,digitalSignature,keyEncipherment,keyCertSign,cRLSign
|
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|
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[ db ]
|
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subjectKeyIdentifier = hash
|
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basicConstraints = critical,CA:FALSE
|
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keyUsage = critical,keyEncipherment,dataEncipherment
|
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authorityKeyIdentifier = keyid,issuer:always
|
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EOF
|
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```
|
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|
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2. Create the Root CA certificate
|
||||
|
||||
```shell
|
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CN="Root, CA" \
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openssl req -x509 -newkey rsa:2048 -nodes \
|
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-keyout root.key \
|
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-days 3650 \
|
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-config config.conf \
|
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-extensions root \
|
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-out root.pem
|
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```
|
||||
|
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3. Create the intermediate CA certificate
|
||||
|
||||
```shell
|
||||
CN="Ubuntu live from scratch, CA" \
|
||||
openssl req -newkey rsa:2048 -nodes \
|
||||
-keyout ca.key \
|
||||
-config config.conf \
|
||||
-out ca.pem
|
||||
```
|
||||
|
||||
4. Create Database (DB) request certificate
|
||||
|
||||
```shell
|
||||
CN="Ubuntu live from scratch, Database" \
|
||||
openssl req -newkey rsa:2048 -nodes \
|
||||
-keyout db.key \
|
||||
-config config.conf \
|
||||
-out db.pem
|
||||
```
|
||||
|
||||
5. Sign the intermediate CA certificate with the Root CA certificate
|
||||
|
||||
```shell
|
||||
CN="Ubuntu live from scratch, CA" \
|
||||
openssl x509 -req \
|
||||
-extfile config.conf \
|
||||
-extensions ca \
|
||||
-in ca.pem \
|
||||
-CA root.pem \
|
||||
-CAkey root.key \
|
||||
-CAcreateserial \
|
||||
-out ca.pem \
|
||||
-days 3650 -sha256
|
||||
```
|
||||
|
||||
6. Sign Database (DB) certificate using your own CA
|
||||
|
||||
```shell
|
||||
CN="Ubuntu live from scratch, Database" \
|
||||
openssl x509 -req \
|
||||
-extfile config.conf \
|
||||
-extensions db \
|
||||
-in db.pem \
|
||||
-CA ca.pem \
|
||||
-CAkey ca.key \
|
||||
-CAcreateserial \
|
||||
-out db.pem \
|
||||
-days 3650 -sha256
|
||||
```
|
||||
|
||||
7. Create the intermediate CA certificate chain
|
||||
|
||||
```shell
|
||||
cat ca.pem root.pem > ca-chain.pem
|
||||
```
|
||||
|
||||
8. Verify the signatures
|
||||
|
||||
```shell
|
||||
openssl verify -CAfile ca-chain.pem db.pem
|
||||
```
|
||||
|
||||
9. Create DER version of our public key (CA)
|
||||
|
||||
```shell
|
||||
openssl x509 -outform DER -in ca.pem -out ca.cer
|
||||
```
|
||||
|
||||
### Creating image
|
||||
|
||||
1. Access image directory
|
||||
|
||||
```shell
|
||||
cd /image
|
||||
```
|
||||
|
||||
2. Create [SBAT](https://github.com/rhboot/shim/blob/main/SBAT.md) file
|
||||
|
||||
```shell
|
||||
GRUB_VERSION=`grub-mkstandalone -V | tr -s ' ' | cut -d' ' -f3 | cut -d'-' -f1`
|
||||
GRUB_RELEASE=`grub-mkstandalone -V | tr -s ' ' | cut -d' ' -f3`
|
||||
|
||||
# create SBAT file
|
||||
cat <<EOF > isolinux/sbat.csv
|
||||
sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md
|
||||
grub,1,Free Software Foundation,grub,$GRUB_VERSION,https://www.gnu.org/software/grub/
|
||||
grub.ubuntu,1,Ubuntu,grub2,$GRUB_RELEASE,https://www.ubuntu.com/
|
||||
EOF
|
||||
```
|
||||
|
||||
3. Create a grub UEFI image
|
||||
|
||||
```shell
|
||||
grub-mkstandalone \
|
||||
--format=x86_64-efi \
|
||||
--output=isolinux/grubx64.efi \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
```
|
||||
|
||||
* Fix Secure Boot Grub
|
||||
|
||||
```shell
|
||||
sed -i 's/SecureBoot/SecureB00t/' isolinux/grubx64.efi
|
||||
```
|
||||
|
||||
4. Add .sbat sections
|
||||
|
||||
```shell
|
||||
objcopy --add-section .sbat=isolinux/sbat.csv isolinux/grubx64.efi --change-section-address .sbat=10000000
|
||||
```
|
||||
|
||||
5. UEFI secure boot signing
|
||||
|
||||
```shell
|
||||
sbsign --key /certificates/db.key --cert /certificates/db.pem --output isolinux/grubx64.efi isolinux/grubx64.efi
|
||||
```
|
||||
|
||||
6. Create a FAT16 UEFI boot disk image containing the EFI bootloader
|
||||
|
||||
```shell
|
||||
(
|
||||
cd isolinux && \
|
||||
dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
|
||||
mkfs.vfat -F 16 efiboot.img && \
|
||||
LC_CTYPE=C mmd -i efiboot.img certificates efi efi/boot && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /usr/lib/shim/shimx64.efi.signed.previous ::efi/boot/bootx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /usr/lib/shim/mmx64.efi ::efi/boot/mmx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /image/isolinux/grubx64.efi ::efi/boot/grubx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /certificates/ca.cer ::certificates/
|
||||
)
|
||||
```
|
||||
|
||||
7. Create a grub BIOS image
|
||||
|
||||
```shell
|
||||
grub-mkstandalone \
|
||||
--format=i386-pc \
|
||||
--output=isolinux/core.img \
|
||||
--install-modules="linux16 linux normal iso9660 biosdisk memdisk search tar ls" \
|
||||
--modules="linux16 linux normal iso9660 biosdisk search" \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
```
|
||||
|
||||
8. Combine a bootable Grub cdboot.img
|
||||
|
||||
```shell
|
||||
cat /usr/lib/grub/i386-pc/cdboot.img isolinux/core.img > isolinux/bios.img
|
||||
```
|
||||
|
||||
9. Generate md5sum.txt
|
||||
|
||||
```shell
|
||||
/bin/bash -c "(find . -type f -print0 | xargs -0 md5sum | grep -v -e 'md5sum.txt' -e 'bios.img' -e 'efiboot.img' > md5sum.txt)"
|
||||
```
|
||||
|
||||
## Cleanup the chroot environment
|
||||
|
||||
1. If you installed software, be sure to run
|
||||
|
||||
```shell
|
||||
truncate -s 0 /etc/machine-id
|
||||
```
|
||||
|
||||
2. Remove the diversion
|
||||
|
||||
```shell
|
||||
rm /sbin/initctl
|
||||
|
||||
dpkg-divert --rename --remove /sbin/initctl
|
||||
```
|
||||
|
||||
3. Clean up
|
||||
|
||||
```shell
|
||||
apt-get clean
|
||||
|
||||
rm -rf /tmp/* ~/.bash_history
|
||||
|
||||
umount /proc
|
||||
|
||||
umount /sys
|
||||
|
||||
umount /dev/pts
|
||||
|
||||
export HISTSIZE=0
|
||||
|
||||
exit
|
||||
```
|
||||
|
||||
## Unbind mount points
|
||||
|
||||
```shell
|
||||
sudo umount $HOME/live-ubuntu-from-scratch/chroot/dev
|
||||
|
||||
sudo umount $HOME/live-ubuntu-from-scratch/chroot/run
|
||||
```
|
||||
|
||||
## Compress the chroot
|
||||
|
|
@ -542,7 +744,13 @@ After everything has been installed and preconfigured in the **chrooted** enviro
|
|||
cd $HOME/live-ubuntu-from-scratch
|
||||
```
|
||||
|
||||
2. Create squashfs
|
||||
2. Move image artifacts
|
||||
|
||||
```shell
|
||||
sudo mv chroot/{image,certificates} .
|
||||
```
|
||||
|
||||
3. Create squashfs
|
||||
|
||||
```shell
|
||||
sudo mksquashfs chroot image/casper/filesystem.squashfs \
|
||||
|
|
@ -560,101 +768,28 @@ After everything has been installed and preconfigured in the **chrooted** enviro
|
|||
> **Squashfs** is a highly compressed read-only filesystem for Linux. It uses zlib compression to compress both files, inodes and directories. Inodes in the system are very small and all blocks are packed to minimize data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
|
||||
> **Squashfs** is intended for general read-only filesystem use, for archival use (i.e. in cases where a .tar.gz file may be used), and in constrained block device/memory systems (e.g. **embedded systems**) where low overhead is needed.
|
||||
|
||||
3. Write the filesystem.size
|
||||
4. Write the filesystem.size
|
||||
|
||||
```shell
|
||||
printf $(sudo du -sx --block-size=1 chroot | cut -f1) > image/casper/filesystem.size
|
||||
printf $(sudo du -sx --block-size=1 chroot | cut -f1) | sudo tee image/casper/filesystem.size
|
||||
```
|
||||
|
||||
## Create diskdefines
|
||||
|
||||
**README** file often found on Linux LiveCD installer discs, such as an Ubuntu Linux installation CD; typically named “**README.diskdefines**” and may be referenced during installation.
|
||||
## Create ISO Image for a LiveCD (BIOS + UEFI + Secure Boot)
|
||||
|
||||
1. Access build directory
|
||||
|
||||
```shell
|
||||
cd $HOME/live-ubuntu-from-scratch
|
||||
```
|
||||
|
||||
2. Create file image/README.diskdefines
|
||||
|
||||
```shell
|
||||
cat <<EOF > image/README.diskdefines
|
||||
#define DISKNAME Ubuntu from scratch
|
||||
#define TYPE binary
|
||||
#define TYPEbinary 1
|
||||
#define ARCH amd64
|
||||
#define ARCHamd64 1
|
||||
#define DISKNUM 1
|
||||
#define DISKNUM1 1
|
||||
#define TOTALNUM 0
|
||||
#define TOTALNUM0 1
|
||||
EOF
|
||||
```
|
||||
|
||||
## Create ISO Image for a LiveCD (BIOS + UEFI)
|
||||
|
||||
1. Access image directory
|
||||
|
||||
```shell
|
||||
cd $HOME/live-ubuntu-from-scratch/image
|
||||
```
|
||||
|
||||
2. Create a grub UEFI image
|
||||
|
||||
```shell
|
||||
grub-mkstandalone \
|
||||
--format=x86_64-efi \
|
||||
--output=isolinux/bootx64.efi \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
```
|
||||
|
||||
3. Create a FAT16 UEFI boot disk image containing the EFI bootloader
|
||||
|
||||
```shell
|
||||
(
|
||||
cd isolinux && \
|
||||
dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
|
||||
sudo mkfs.vfat efiboot.img && \
|
||||
LC_CTYPE=C mmd -i efiboot.img efi efi/boot && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img ./bootx64.efi ::efi/boot/
|
||||
)
|
||||
```
|
||||
|
||||
4. Create a grub BIOS image
|
||||
|
||||
```shell
|
||||
grub-mkstandalone \
|
||||
--format=i386-pc \
|
||||
--output=isolinux/core.img \
|
||||
--install-modules="linux16 linux normal iso9660 biosdisk memdisk search tar ls" \
|
||||
--modules="linux16 linux normal iso9660 biosdisk search" \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
```
|
||||
|
||||
5. Combine a bootable Grub cdboot.img
|
||||
|
||||
```shell
|
||||
cat /usr/lib/grub/i386-pc/cdboot.img isolinux/core.img > isolinux/bios.img
|
||||
```
|
||||
|
||||
6. Generate md5sum.txt
|
||||
|
||||
```shell
|
||||
sudo /bin/bash -c "(find . -type f -print0 | xargs -0 md5sum | grep -v -e 'md5sum.txt' -e 'bios.img' -e 'efiboot.img' > md5sum.txt)"
|
||||
```
|
||||
|
||||
7. Create iso from the image directory using the command-line
|
||||
2. Create iso from the image directory using the command-line
|
||||
|
||||
```shell
|
||||
sudo xorriso \
|
||||
-as mkisofs \
|
||||
-iso-level 3 \
|
||||
-full-iso9660-filenames \
|
||||
-J -J -joliet-long \
|
||||
-volid "Ubuntu from scratch" \
|
||||
-output "../ubuntu-from-scratch.iso" \
|
||||
-eltorito-boot boot/grub/bios.img \
|
||||
|
|
@ -663,7 +798,7 @@ After everything has been installed and preconfigured in the **chrooted** enviro
|
|||
-boot-info-table \
|
||||
--eltorito-catalog boot/grub/boot.cat \
|
||||
--grub2-boot-info \
|
||||
--grub2-mbr /usr/lib/grub/i386-pc/boot_hybrid.img \
|
||||
--grub2-mbr ../chroot/usr/lib/grub/i386-pc/boot_hybrid.img \
|
||||
-eltorito-alt-boot \
|
||||
-e EFI/efiboot.img \
|
||||
-no-emul-boot \
|
||||
|
|
@ -716,17 +851,24 @@ After everything has been installed and preconfigured in the **chrooted** enviro
|
|||
|
||||
```shell
|
||||
apt install -y syslinux-common && \
|
||||
cp /usr/lib/ISOLINUX/isolinux.bin isolinux/ && \
|
||||
cp /usr/lib/syslinux/modules/bios/* isolinux/
|
||||
cp /usr/lib/ISOLINUX/isolinux.bin image/isolinux/ && \
|
||||
cp /usr/lib/syslinux/modules/bios/* image/isolinux/
|
||||
```
|
||||
|
||||
3. Create iso from the image directory
|
||||
3. Access build directory
|
||||
|
||||
```shell
|
||||
cd $HOME/live-ubuntu-from-scratch/image
|
||||
```
|
||||
|
||||
4. Create iso from the image directory
|
||||
|
||||
```shell
|
||||
sudo xorriso \
|
||||
-as mkisofs \
|
||||
-iso-level 3 \
|
||||
-full-iso9660-filenames \
|
||||
-J -J -joliet-long \
|
||||
-volid "Ubuntu from scratch" \
|
||||
-output "../ubuntu-from-scratch.iso" \
|
||||
-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
|
||||
|
|
|
|||
112
scripts/build.sh
112
scripts/build.sh
|
|
@ -3,7 +3,6 @@
|
|||
set -e # exit on error
|
||||
set -o pipefail # exit on pipeline error
|
||||
set -u # treat unset variable as error
|
||||
#set -x
|
||||
|
||||
SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
|
||||
|
||||
|
|
@ -99,7 +98,7 @@ function check_config() {
|
|||
function setup_host() {
|
||||
echo "=====> running setup_host ..."
|
||||
sudo apt update
|
||||
sudo apt install -y binutils debootstrap squashfs-tools xorriso grub-pc-bin grub-efi-amd64-bin mtools dosfstools unzip
|
||||
sudo apt install -y debootstrap squashfs-tools xorriso
|
||||
sudo mkdir -p chroot
|
||||
}
|
||||
|
||||
|
|
@ -136,65 +135,8 @@ function run_chroot() {
|
|||
function build_iso() {
|
||||
echo "=====> running build_iso ..."
|
||||
|
||||
rm -rf image
|
||||
mkdir -p image/{casper,isolinux,install}
|
||||
|
||||
# copy kernel files
|
||||
sudo cp chroot/boot/vmlinuz-**-**-generic image/casper/vmlinuz
|
||||
sudo cp chroot/boot/initrd.img-**-**-generic image/casper/initrd
|
||||
|
||||
# memtest86
|
||||
sudo cp chroot/boot/memtest86+.bin image/install/memtest86+
|
||||
|
||||
wget --progress=dot https://www.memtest86.com/downloads/memtest86-usb.zip -O image/install/memtest86-usb.zip
|
||||
unzip -p image/install/memtest86-usb.zip memtest86-usb.img > image/install/memtest86
|
||||
rm -f image/install/memtest86-usb.zip
|
||||
|
||||
# grub
|
||||
touch image/ubuntu
|
||||
cat <<EOF > image/isolinux/grub.cfg
|
||||
|
||||
search --set=root --file /ubuntu
|
||||
|
||||
insmod all_video
|
||||
|
||||
set default="0"
|
||||
set timeout=30
|
||||
|
||||
menuentry "${GRUB_LIVEBOOT_LABEL}" {
|
||||
linux /casper/vmlinuz boot=casper nopersistent toram quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "${GRUB_INSTALL_LABEL}" {
|
||||
linux /casper/vmlinuz boot=casper only-ubiquity quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "Check disc for defects" {
|
||||
linux /casper/vmlinuz boot=casper integrity-check quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "Test memory Memtest86+ (BIOS)" {
|
||||
linux16 /install/memtest86+
|
||||
}
|
||||
|
||||
menuentry "Test memory Memtest86 (UEFI, long load time)" {
|
||||
insmod part_gpt
|
||||
insmod search_fs_uuid
|
||||
insmod chain
|
||||
loopback loop /install/memtest86
|
||||
chainloader (loop,gpt1)/efi/boot/BOOTX64.efi
|
||||
}
|
||||
EOF
|
||||
|
||||
# generate manifest
|
||||
sudo chroot chroot dpkg-query -W --showformat='${Package} ${Version}\n' | sudo tee image/casper/filesystem.manifest
|
||||
sudo cp -v image/casper/filesystem.manifest image/casper/filesystem.manifest-desktop
|
||||
for pkg in $TARGET_PACKAGE_REMOVE; do
|
||||
sudo sed -i "/$pkg/d" image/casper/filesystem.manifest-desktop
|
||||
done
|
||||
# move image artifacts
|
||||
sudo mv chroot/{image,certificates} .
|
||||
|
||||
# compress rootfs
|
||||
sudo mksquashfs chroot image/casper/filesystem.squashfs \
|
||||
|
|
@ -207,68 +149,30 @@ EOF
|
|||
-e "tmp/*" \
|
||||
-e "tmp/.*" \
|
||||
-e "swapfile"
|
||||
printf $(sudo du -sx --block-size=1 chroot | cut -f1) > image/casper/filesystem.size
|
||||
|
||||
# create diskdefines
|
||||
cat <<EOF > image/README.diskdefines
|
||||
#define DISKNAME ${GRUB_LIVEBOOT_LABEL}
|
||||
#define TYPE binary
|
||||
#define TYPEbinary 1
|
||||
#define ARCH amd64
|
||||
#define ARCHamd64 1
|
||||
#define DISKNUM 1
|
||||
#define DISKNUM1 1
|
||||
#define TOTALNUM 0
|
||||
#define TOTALNUM0 1
|
||||
EOF
|
||||
# write the filesystem.size
|
||||
printf $(sudo du -sx --block-size=1 chroot | cut -f1) | sudo tee image/casper/filesystem.size
|
||||
|
||||
# create iso image
|
||||
pushd $SCRIPT_DIR/image
|
||||
grub-mkstandalone \
|
||||
--format=x86_64-efi \
|
||||
--output=isolinux/bootx64.efi \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
|
||||
(
|
||||
cd isolinux && \
|
||||
dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
|
||||
sudo mkfs.vfat efiboot.img && \
|
||||
LC_CTYPE=C mmd -i efiboot.img efi efi/boot && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img ./bootx64.efi ::efi/boot/
|
||||
)
|
||||
|
||||
grub-mkstandalone \
|
||||
--format=i386-pc \
|
||||
--output=isolinux/core.img \
|
||||
--install-modules="linux16 linux normal iso9660 biosdisk memdisk search tar ls" \
|
||||
--modules="linux16 linux normal iso9660 biosdisk search" \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
|
||||
cat /usr/lib/grub/i386-pc/cdboot.img isolinux/core.img > isolinux/bios.img
|
||||
|
||||
sudo /bin/bash -c "(find . -type f -print0 | xargs -0 md5sum | grep -v -e 'md5sum.txt' -e 'bios.img' -e 'efiboot.img' > md5sum.txt)"
|
||||
|
||||
sudo xorriso \
|
||||
-as mkisofs \
|
||||
-iso-level 3 \
|
||||
-full-iso9660-filenames \
|
||||
-J -J -joliet-long \
|
||||
-volid "$TARGET_NAME" \
|
||||
-output "$SCRIPT_DIR/$TARGET_NAME.iso" \
|
||||
-eltorito-boot boot/grub/bios.img \
|
||||
-no-emul-boot \
|
||||
-boot-load-size 4 \
|
||||
-boot-info-table \
|
||||
--eltorito-catalog boot/grub/boot.cat \
|
||||
--grub2-boot-info \
|
||||
--grub2-mbr /usr/lib/grub/i386-pc/boot_hybrid.img \
|
||||
--grub2-mbr ../chroot/usr/lib/grub/i386-pc/boot_hybrid.img \
|
||||
-eltorito-alt-boot \
|
||||
-e EFI/efiboot.img \
|
||||
-no-emul-boot \
|
||||
-append_partition 2 0xef isolinux/efiboot.img \
|
||||
-output "$SCRIPT_DIR/$TARGET_NAME.iso" \
|
||||
-m "isolinux/efiboot.img" \
|
||||
-m "isolinux/bios.img" \
|
||||
-graft-points \
|
||||
|
|
|
|||
|
|
@ -3,11 +3,10 @@
|
|||
set -e # exit on error
|
||||
set -o pipefail # exit on pipeline error
|
||||
set -u # treat unset variable as error
|
||||
#set -x
|
||||
|
||||
SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
|
||||
|
||||
CMD=(setup_host install_pkg finish_up)
|
||||
CMD=(setup_host install_pkg build_image finish_up)
|
||||
|
||||
function help() {
|
||||
# if $1 is set, use $1 as headline message in help()
|
||||
|
|
@ -107,16 +106,20 @@ function install_pkg() {
|
|||
laptop-detect \
|
||||
os-prober \
|
||||
network-manager \
|
||||
resolvconf \
|
||||
net-tools \
|
||||
wireless-tools \
|
||||
wpagui \
|
||||
locales \
|
||||
grub-common \
|
||||
grub-gfxpayload-lists \
|
||||
grub-pc \
|
||||
grub-pc-bin \
|
||||
grub2-common \
|
||||
locales
|
||||
grub-efi-amd64-signed \
|
||||
shim-signed \
|
||||
memtest86+ \
|
||||
mtools \
|
||||
binutils
|
||||
|
||||
case $TARGET_UBUNTU_VERSION in
|
||||
"focal" | "bionic")
|
||||
|
|
@ -146,14 +149,13 @@ function install_pkg() {
|
|||
|
||||
# final touch
|
||||
dpkg-reconfigure locales
|
||||
dpkg-reconfigure resolvconf
|
||||
|
||||
# network manager
|
||||
cat <<EOF > /etc/NetworkManager/NetworkManager.conf
|
||||
[main]
|
||||
rc-manager=resolvconf
|
||||
rc-manager=none
|
||||
plugins=ifupdown,keyfile
|
||||
dns=dnsmasq
|
||||
dns=systemd-resolved
|
||||
|
||||
[ifupdown]
|
||||
managed=false
|
||||
|
|
@ -164,6 +166,250 @@ EOF
|
|||
apt-get clean -y
|
||||
}
|
||||
|
||||
function build_image() {
|
||||
echo "=====> running build_image ..."
|
||||
|
||||
rm -rf /image
|
||||
|
||||
mkdir -p /image/{casper,isolinux,install}
|
||||
|
||||
pushd /image
|
||||
|
||||
# copy kernel files
|
||||
cp /boot/vmlinuz-**-**-generic casper/vmlinuz
|
||||
cp /boot/initrd.img-**-**-generic casper/initrd
|
||||
|
||||
# memtest86
|
||||
if [ -f "/boot/memtest86+x64.bin" ]; then
|
||||
cp /boot/memtest86+x64.bin install/memtest86+
|
||||
else
|
||||
cp /boot/memtest86+.bin install/memtest86+
|
||||
fi
|
||||
|
||||
# memtest86++
|
||||
wget --progress=dot https://www.memtest86.com/downloads/memtest86-usb.zip -O install/memtest86-usb.zip
|
||||
unzip -p install/memtest86-usb.zip memtest86-usb.img > install/memtest86
|
||||
rm -f install/memtest86-usb.zip
|
||||
|
||||
# grub
|
||||
touch ubuntu
|
||||
cat <<EOF > isolinux/grub.cfg
|
||||
|
||||
search --set=root --file /ubuntu
|
||||
|
||||
insmod all_video
|
||||
|
||||
set default="0"
|
||||
set timeout=30
|
||||
|
||||
menuentry "Try Ubuntu FS without installing" {
|
||||
linux /casper/vmlinuz boot=casper nopersistent toram quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "Install Ubuntu FS" {
|
||||
linux /casper/vmlinuz boot=casper only-ubiquity quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "Check disc for defects" {
|
||||
linux /casper/vmlinuz boot=casper integrity-check quiet splash ---
|
||||
initrd /casper/initrd
|
||||
}
|
||||
|
||||
menuentry "Test memory Memtest86+ (BIOS)" {
|
||||
linux16 /install/memtest86+
|
||||
}
|
||||
|
||||
menuentry "Test memory Memtest86 (UEFI, long load time)" {
|
||||
insmod part_gpt
|
||||
insmod search_fs_uuid
|
||||
insmod chain
|
||||
loopback loop /install/memtest86
|
||||
chainloader (loop,gpt1)/efi/boot/BOOTX64.efi
|
||||
}
|
||||
EOF
|
||||
|
||||
# generate manifest
|
||||
dpkg-query -W --showformat='${Package} ${Version}\n' | sudo tee casper/filesystem.manifest
|
||||
|
||||
cp -v casper/filesystem.manifest casper/filesystem.manifest-desktop
|
||||
|
||||
for pkg in $TARGET_PACKAGE_REMOVE; do
|
||||
sudo sed -i "/$pkg/d" casper/filesystem.manifest-desktop
|
||||
done
|
||||
|
||||
# create diskdefines
|
||||
cat <<EOF > README.diskdefines
|
||||
#define DISKNAME ${GRUB_LIVEBOOT_LABEL}
|
||||
#define TYPE binary
|
||||
#define TYPEbinary 1
|
||||
#define ARCH amd64
|
||||
#define ARCHamd64 1
|
||||
#define DISKNUM 1
|
||||
#define DISKNUM1 1
|
||||
#define TOTALNUM 0
|
||||
#define TOTALNUM0 1
|
||||
EOF
|
||||
|
||||
# create certificates
|
||||
rm -rf /certificates
|
||||
mkdir /certificates
|
||||
|
||||
pushd /certificates
|
||||
|
||||
# create the certificate template
|
||||
cat <<EOF > config.conf
|
||||
[ req ]
|
||||
default_bits = 2048
|
||||
default_md = sha256
|
||||
distinguished_name = dn
|
||||
prompt = no
|
||||
|
||||
[ dn ]
|
||||
C = BR
|
||||
ST = SP
|
||||
L = Campinas
|
||||
O = Scratch, Labs
|
||||
OU = Labs
|
||||
CN = \${ENV::CN}
|
||||
|
||||
[ root ]
|
||||
basicConstraints = critical,CA:TRUE
|
||||
subjectKeyIdentifier = hash
|
||||
authorityKeyIdentifier = keyid:always,issuer
|
||||
keyUsage = critical,digitalSignature,keyEncipherment,keyCertSign,cRLSign
|
||||
|
||||
[ ca ]
|
||||
basicConstraints = critical,CA:TRUE,pathlen:0
|
||||
subjectKeyIdentifier = hash
|
||||
authorityKeyIdentifier = keyid:always,issuer:always
|
||||
keyUsage = critical,digitalSignature,keyEncipherment,keyCertSign,cRLSign
|
||||
|
||||
[ db ]
|
||||
subjectKeyIdentifier = hash
|
||||
basicConstraints = critical,CA:FALSE
|
||||
keyUsage = critical,keyEncipherment,dataEncipherment
|
||||
authorityKeyIdentifier = keyid,issuer:always
|
||||
EOF
|
||||
|
||||
# create the Root CA certificate
|
||||
CN="Root, CA" \
|
||||
openssl req -x509 -newkey rsa:2048 -nodes \
|
||||
-keyout root.key \
|
||||
-days 3650 \
|
||||
-config config.conf \
|
||||
-extensions root \
|
||||
-out root.pem
|
||||
|
||||
# create the intermediate CA certificate
|
||||
CN="Ubuntu live from scratch, CA" \
|
||||
openssl req -newkey rsa:2048 -nodes \
|
||||
-keyout ca.key \
|
||||
-config config.conf \
|
||||
-out ca.pem
|
||||
|
||||
# create Database (DB) request certificate
|
||||
CN="Ubuntu live from scratch, Database" \
|
||||
openssl req -newkey rsa:2048 -nodes \
|
||||
-keyout db.key \
|
||||
-config config.conf \
|
||||
-out db.pem
|
||||
|
||||
# sign the intermediate CA certificate with the Root CA certificate
|
||||
CN="Ubuntu live from scratch, CA" \
|
||||
openssl x509 -req \
|
||||
-extfile config.conf \
|
||||
-extensions ca \
|
||||
-in ca.pem \
|
||||
-CA root.pem \
|
||||
-CAkey root.key \
|
||||
-CAcreateserial \
|
||||
-out ca.pem \
|
||||
-days 3650 -sha256
|
||||
|
||||
# sign Database (DB) certificate using your own CA
|
||||
CN="Ubuntu live from scratch, Database" \
|
||||
openssl x509 -req \
|
||||
-extfile config.conf \
|
||||
-extensions db \
|
||||
-in db.pem \
|
||||
-CA ca.pem \
|
||||
-CAkey ca.key \
|
||||
-CAcreateserial \
|
||||
-out db.pem \
|
||||
-days 3650 -sha256
|
||||
|
||||
# create the intermediate CA certificate chain
|
||||
cat ca.pem root.pem > ca-chain.pem
|
||||
|
||||
# verify the signatures
|
||||
openssl verify -CAfile ca-chain.pem db.pem
|
||||
|
||||
# create DER version of our public key (CA)
|
||||
openssl x509 -outform DER -in ca.pem -out ca.cer
|
||||
|
||||
popd # return to image directory
|
||||
|
||||
# grub version/release
|
||||
GRUB_VERSION=`grub-mkstandalone -V | tr -s ' ' | cut -d' ' -f3 | cut -d'-' -f1`
|
||||
GRUB_RELEASE=`grub-mkstandalone -V | tr -s ' ' | cut -d' ' -f3`
|
||||
|
||||
# create SBAT file
|
||||
cat <<EOF > isolinux/sbat.csv
|
||||
sbat,1,SBAT Version,sbat,1,https://github.com/rhboot/shim/blob/main/SBAT.md
|
||||
grub,1,Free Software Foundation,grub,$GRUB_VERSION,https://www.gnu.org/software/grub/
|
||||
grub.ubuntu,1,Ubuntu,grub2,$GRUB_RELEASE,https://www.ubuntu.com/
|
||||
EOF
|
||||
|
||||
# create a grub UEFI image
|
||||
grub-mkstandalone \
|
||||
--format=x86_64-efi \
|
||||
--output=isolinux/grubx64.efi \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
|
||||
# fix secure boot grub
|
||||
sed -i 's/SecureBoot/SecureB00t/' isolinux/grubx64.efi
|
||||
|
||||
# add .sbat sections
|
||||
objcopy --add-section .sbat=isolinux/sbat.csv isolinux/grubx64.efi --change-section-address .sbat=10000000
|
||||
|
||||
# UEFI secure boot signing
|
||||
sbsign --key /certificates/db.key --cert /certificates/db.pem --output isolinux/grubx64.efi isolinux/grubx64.efi
|
||||
|
||||
# create a FAT16 UEFI boot disk image containing the EFI bootloader
|
||||
(
|
||||
cd isolinux && \
|
||||
dd if=/dev/zero of=efiboot.img bs=1M count=10 && \
|
||||
mkfs.vfat -F 16 efiboot.img && \
|
||||
LC_CTYPE=C mmd -i efiboot.img certificates efi efi/boot && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /usr/lib/shim/shimx64.efi.signed.previous ::efi/boot/bootx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /usr/lib/shim/mmx64.efi ::efi/boot/mmx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img ./grubx64.efi ::efi/boot/grubx64.efi && \
|
||||
LC_CTYPE=C mcopy -i efiboot.img /certificates/ca.cer ::certificates/
|
||||
)
|
||||
|
||||
# create a grub BIOS image
|
||||
grub-mkstandalone \
|
||||
--format=i386-pc \
|
||||
--output=isolinux/core.img \
|
||||
--install-modules="linux16 linux normal iso9660 biosdisk memdisk search tar ls" \
|
||||
--modules="linux16 linux normal iso9660 biosdisk search" \
|
||||
--locales="" \
|
||||
--fonts="" \
|
||||
"boot/grub/grub.cfg=isolinux/grub.cfg"
|
||||
|
||||
# combine a bootable Grub cdboot.img
|
||||
cat /usr/lib/grub/i386-pc/cdboot.img isolinux/core.img > isolinux/bios.img
|
||||
|
||||
# generate md5sum.txt
|
||||
/bin/bash -c "(find . -type f -print0 | xargs -0 md5sum | grep -v -e 'md5sum.txt' -e 'bios.img' -e 'efiboot.img' > md5sum.txt)"
|
||||
|
||||
popd # return initial directory
|
||||
}
|
||||
|
||||
function finish_up() {
|
||||
echo "=====> finish_up"
|
||||
|
||||
|
|
|
|||
|
|
@ -5,9 +5,9 @@
|
|||
# Usage: Copy this file to config.sh and make changes there. Keep this file (default_config.sh) as-is
|
||||
# so that subsequent changes can be easily merged from upstream. Keep all customiations in config.sh
|
||||
|
||||
# The version of Ubuntu to generate. Successfully tested: bionic, cosmic, disco, eoan, focal, groovy, jammy
|
||||
# The version of Ubuntu to generate. Successfully tested LTS: bionic, focal, jammy, noble
|
||||
# See https://wiki.ubuntu.com/DevelopmentCodeNames for details
|
||||
export TARGET_UBUNTU_VERSION="jammy"
|
||||
export TARGET_UBUNTU_VERSION="noble"
|
||||
|
||||
# The Ubuntu Mirror URL. It's better to change for faster download.
|
||||
# More mirrors see: https://launchpad.net/ubuntu/+archivemirrors
|
||||
|
|
@ -41,7 +41,7 @@ export TARGET_PACKAGE_REMOVE="
|
|||
function customize_image() {
|
||||
# install graphics and desktop
|
||||
apt-get install -y \
|
||||
plymouth-theme-ubuntu-logo \
|
||||
plymouth-themes \
|
||||
ubuntu-gnome-desktop \
|
||||
ubuntu-gnome-wallpapers
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue