“UbuntuHelp:EncryptedFilesystemHowto4”的版本间的差异
来自Ubuntu中文
小 |
小 |
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第5行: | 第5行: | ||
this method: | this method: | ||
* Uses RSA keys and thus is ready for smartcards (although in this howto | * Uses RSA keys and thus is ready for smartcards (although in this howto | ||
− | + | the RSA private key is still stored on disk as encrypted file) | |
* Password changes are possible. With LUKS that would be possible too (but no smart card support), with cryptsetup it would not. | * Password changes are possible. With LUKS that would be possible too (but no smart card support), with cryptsetup it would not. | ||
第13行: | 第13行: | ||
== How to install Ubuntu encrypted == | == How to install Ubuntu encrypted == | ||
− | + | ||
− | + | ** Boot from desktop CD | |
− | + | Download this text to the ubuntu system, so you can cut and paste. Open in vi (not less, with less you get cut&paste problems on long lines). | |
− | + | ||
− | + | ** Start an xterm | |
− | + | ||
− | + | ** Get a root shell | |
− | + | <code><nowiki>sudo bash</nowiki></code> | |
− | + | ||
− | + | ** load dm-crypt | |
− | + | <code><nowiki>modprobe dm-crypt</nowiki></code> | |
− | + | ||
− | + | ** Partition the system | |
− | + | <code><nowiki>cfdisk /dev/sda</nowiki></code> # or /dev/hda | |
− | + | Create three partitions: | |
− | + | * first partition: linux, 100mb, bootable (/boot) | |
− | + | * second parition: linux, what you prefer (2GB?) (swap) | |
− | + | * third partition: root, rest of the disk (or leave space - however you prefer) | |
− | + | ||
− | + | Do not set the second partition to swap, as ubuntu will automatically enable it and thus cause problems. | |
− | + | ||
− | + | In this document we will assume: | |
− | + | * /dev/sda1 /boot partition | |
− | + | * /dev/sda2 swap partition | |
− | + | * /dev/sda3 root partition | |
− | + | ||
− | + | ** Create crypto keys in /tmp (tmpfs, never written anywhere) | |
− | + | <pre><nowiki>cd /tmp | |
openssl genrsa -aes256 -out privkey.pem 2048 | openssl genrsa -aes256 -out privkey.pem 2048 | ||
dd if=/dev/urandom of=swapkey bs=32 count=1 | dd if=/dev/urandom of=swapkey bs=32 count=1 | ||
第47行: | 第47行: | ||
openssl rsautl -in rootkey -out rootkey.enc -inkey privkey.pem -encrypt | openssl rsautl -in rootkey -out rootkey.enc -inkey privkey.pem -encrypt | ||
rm swapkey rootkey | rm swapkey rootkey | ||
− | + | ||
SWAPKEY=`openssl rsautl -in swapkey.enc -decrypt -inkey privkey.pem \ | SWAPKEY=`openssl rsautl -in swapkey.enc -decrypt -inkey privkey.pem \ | ||
− | + | | hexdump -e '"" 32/1 "%02x" "\n"'` | |
ROOTKEY=`openssl rsautl -in rootkey.enc -decrypt -inkey privkey.pem \ | ROOTKEY=`openssl rsautl -in rootkey.enc -decrypt -inkey privkey.pem \ | ||
− | + | | hexdump -e '"" 32/1 "%02x" "\n"'` | |
echo 0 `blockdev --getsize /dev/sda2` crypt aes-cbc-essiv:sha256 \ | echo 0 `blockdev --getsize /dev/sda2` crypt aes-cbc-essiv:sha256 \ | ||
− | + | $SWAPKEY 0 /dev/sda2 0 |dmsetup create swap | |
echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ | echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ | ||
− | + | $ROOTKEY 0 /dev/sda3 0 |dmsetup create root | |
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** Create filesystems | |
− | + | <pre><nowiki>mkfs.ext3 /dev/sda1 # /boot | |
mkswap /dev/mapper/swap # swap | mkswap /dev/mapper/swap # swap | ||
mkfs.ext3 /dev/mapper/root # root | mkfs.ext3 /dev/mapper/root # root | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** Mount filesystems | |
− | + | <pre><nowiki>mount /dev/mapper/root /mnt | |
mkdir /mnt/boot | mkdir /mnt/boot | ||
mount /dev/sda1 /mnt/boot | mount /dev/sda1 /mnt/boot | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** Download ar and debootstrap | |
− | + | <pre><nowiki>cd /tmp | |
mkdir download | mkdir download | ||
cd download | cd download | ||
第79行: | 第79行: | ||
dpkg -x debootstrap*deb x | dpkg -x debootstrap*deb x | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** install dapper on the crypto root | |
− | + | <pre><nowiki>export LD_LIBRARY_PATH=/tmp/download/x/usr/lib | |
export PATH=/tmp/download/x/usr/bin:$PATH | export PATH=/tmp/download/x/usr/bin:$PATH | ||
export DEBOOTSTRAP_DIR=/tmp/download/x/usr/lib/debootstrap | export DEBOOTSTRAP_DIR=/tmp/download/x/usr/lib/debootstrap | ||
第87行: | 第87行: | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ** create an fstab in the chroot | |
− | + | <pre><nowiki>chroot /mnt | |
vi /etc/fstab | vi /etc/fstab | ||
/dev/sda1 /boot ext3 defaults 0 0 | /dev/sda1 /boot ext3 defaults 0 0 | ||
第99行: | 第99行: | ||
none /dev/pts devpts defaults 0 0 | none /dev/pts devpts defaults 0 0 | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** create an apt config file in the chroot | |
− | + | <pre><nowiki>chroot /mnt | |
vi /etc/apt/sources.list | vi /etc/apt/sources.list | ||
deb http://de.archive.ubuntu.com/ubuntu/ dapper main restricted | deb http://de.archive.ubuntu.com/ubuntu/ dapper main restricted | ||
第111行: | 第111行: | ||
deb-src http://de.archive.ubuntu.com/ubuntu/ dapper-security main restricted | deb-src http://de.archive.ubuntu.com/ubuntu/ dapper-security main restricted | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** update packages, install dselect and kubuntu-destkop | |
− | + | <pre><nowiki>chroot /mnt | |
apt-get update | apt-get update | ||
apt-get upgrade | apt-get upgrade | ||
第120行: | 第120行: | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ** configure initramfs-tools for crypt root and swap | |
− | + | <pre><nowiki>chroot /mnt | |
cd /etc/mkinitramfs | cd /etc/mkinitramfs | ||
echo dm-crypt >> modules | echo dm-crypt >> modules | ||
第127行: | 第127行: | ||
echo sha256 >> modules | echo sha256 >> modules | ||
vi hooks/cryptroot (copy till EOF) | vi hooks/cryptroot (copy till EOF) | ||
− | + | #!/bin/sh | |
+ | |||
. /usr/share/initramfs-tools/hook-functions | . /usr/share/initramfs-tools/hook-functions | ||
− | + | ||
mkdir -p ${DESTDIR}/boot | mkdir -p ${DESTDIR}/boot | ||
mkdir -p ${DESTDIR}/sbin | mkdir -p ${DESTDIR}/sbin | ||
mkdir -p ${DESTDIR}/usr/bin | mkdir -p ${DESTDIR}/usr/bin | ||
− | + | ||
cp -p /boot/privkey.pem /boot/rootkey.enc /boot/swapkey.enc ${DESTDIR}/boot | cp -p /boot/privkey.pem /boot/rootkey.enc /boot/swapkey.enc ${DESTDIR}/boot | ||
− | + | ||
copy_exec /sbin/blockdev /sbin | copy_exec /sbin/blockdev /sbin | ||
copy_exec /sbin/dmsetup /sbin | copy_exec /sbin/dmsetup /sbin | ||
第141行: | 第142行: | ||
copy_exec /usr/bin/hexdump /usr/bin | copy_exec /usr/bin/hexdump /usr/bin | ||
EOF | EOF | ||
− | + | ||
chmod +x hooks/cryptroot | chmod +x hooks/cryptroot | ||
− | + | ||
vi scripts/local-top/cryptroot (copy till EOF) | vi scripts/local-top/cryptroot (copy till EOF) | ||
− | + | #!/bin/sh | |
+ | |||
PREREQ="udev" | PREREQ="udev" | ||
− | + | ||
+ | # Output pre-requisites | ||
prereqs() | prereqs() | ||
{ | { | ||
− | + | echo "$PREREQ" | |
} | } | ||
− | + | ||
case "$1" in | case "$1" in | ||
− | + | prereqs) | |
− | + | prereqs | |
− | + | exit 0 | |
− | + | ;; | |
esac | esac | ||
− | + | ||
modprobe aes | modprobe aes | ||
modprobe sha256 | modprobe sha256 | ||
modprobe dm-crypt | modprobe dm-crypt | ||
− | + | ||
echo "Waiting for crypted root device..." | echo "Waiting for crypted root device..." | ||
− | + | ||
slumber=1800 | slumber=1800 | ||
while [ ${slumber} -gt 0 -a ! -e "/dev/sda3" ]; do | while [ ${slumber} -gt 0 -a ! -e "/dev/sda3" ]; do | ||
− | + | /bin/sleep 0.1 | |
− | + | slumber=$(( ${slumber} - 1 )) | |
done | done | ||
− | + | ||
while test -z "$ROOTKEY" | while test -z "$ROOTKEY" | ||
do | do | ||
− | + | ROOTKEY=`openssl rsautl -in /boot/rootkey.enc -decrypt | |
-inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 | -inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 | ||
"%02x" "\n"' ` | "%02x" "\n"' ` | ||
done | done | ||
− | + | ||
SECTORS=`blockdev --getsize /dev/sda3` | SECTORS=`blockdev --getsize /dev/sda3` | ||
− | + | ||
echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $ROOTKEY 0 /dev/sda3 0 \ | echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $ROOTKEY 0 /dev/sda3 0 \ | ||
− | + | |dmsetup create root | |
− | + | ||
echo "Waiting for crypted swap device..." | echo "Waiting for crypted swap device..." | ||
− | + | ||
slumber=1800 | slumber=1800 | ||
while [ ${slumber} -gt 0 -a ! -e "/dev/sda2" ]; do | while [ ${slumber} -gt 0 -a ! -e "/dev/sda2" ]; do | ||
− | + | /bin/sleep 0.1 | |
− | + | slumber=$(( ${slumber} - 1 )) | |
done | done | ||
− | + | ||
while test -z "$SWAPKEY" | while test -z "$SWAPKEY" | ||
do | do | ||
− | + | SWAPKEY=`openssl rsautl -in /boot/swapkey.enc -decrypt | |
-inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 | -inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 | ||
"%02x" "\n"' ` | "%02x" "\n"' ` | ||
done | done | ||
− | + | ||
SECTORS=`blockdev --getsize /dev/sda2` | SECTORS=`blockdev --getsize /dev/sda2` | ||
− | + | ||
echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $SWAPKEY 0 /dev/sda2 0 \ | echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $SWAPKEY 0 /dev/sda2 0 \ | ||
− | + | |dmsetup create swap | |
EOF | EOF | ||
chmod +x scripts/local-top/cryptroot | chmod +x scripts/local-top/cryptroot | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** put the crypto keys in place and create a new initramfs | |
− | + | <pre><nowiki>mv /tmp/privkey.pem /tmp/swapkey.enc /tmp/rootkey.enc /mnt/boot/ | |
chroot /mnt | chroot /mnt | ||
update-initramfs -u | update-initramfs -u | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** install grub | |
− | + | <pre><nowiki>chroot /mnt | |
update-grub | update-grub | ||
apt-get install kubuntu-grub-splashimages | apt-get install kubuntu-grub-splashimages | ||
− | + | ||
cd /boot/grub | cd /boot/grub | ||
cp /lib/grub/i386-pc/* . | cp /lib/grub/i386-pc/* . | ||
− | + | ||
grub | grub | ||
root (hd0,0) | root (hd0,0) | ||
第226行: | 第229行: | ||
quit | quit | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | ** configure grub | |
****** vi /boot/grub/menu.lst | ****** vi /boot/grub/menu.lst | ||
****** add "acpi=off" | ****** add "acpi=off" | ||
第237行: | 第240行: | ||
****** remove all "savedefault" lines | ****** remove all "savedefault" lines | ||
****** remove splash as you want a console to enter your password | ****** remove splash as you want a console to enter your password | ||
− | + | ||
− | + | ** finish installation, reboot | |
− | + | <pre><nowiki>umount /mnt/boot | |
fuser -k /mnt | fuser -k /mnt | ||
umount /mnt | umount /mnt | ||
sync | sync | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | press ctrl-alt-del and select reboot | |
− | + | ||
=== Tools === | === Tools === | ||
− | + | ||
− | + | * change password on rsa key | |
− | + | <pre><nowiki>su root | |
cd /boot | cd /boot | ||
openssl rsa -in privkey.pem -out privkey.new.pem -aes256 | openssl rsa -in privkey.pem -out privkey.new.pem -aes256 | ||
第256行: | 第259行: | ||
update-initramfs -u | update-initramfs -u | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | * replace rsa key | |
− | + | <pre><nowiki>su root | |
cd /tmp | cd /tmp | ||
openssl rsautl -in /boot/rootkey.enc -inkey /boot/privkey.pem \ | openssl rsautl -in /boot/rootkey.enc -inkey /boot/privkey.pem \ | ||
− | + | -decrypt -out rootkey | |
openssl rsautl -in /boot/swapkey.enc -inkey /boot/privkey.pem \ | openssl rsautl -in /boot/swapkey.enc -inkey /boot/privkey.pem \ | ||
− | + | -decrypt -out swapkey | |
openssl genrsa -aes256 -out privkey.pem 2048 | openssl genrsa -aes256 -out privkey.pem 2048 | ||
openssl rsautl -in swapkey -out swapkey.enc -inkey privkey.pem -encrypt | openssl rsautl -in swapkey -out swapkey.enc -inkey privkey.pem -encrypt | ||
第271行: | 第274行: | ||
update-initramfs -u | update-initramfs -u | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | * recover with bootcd | |
****** boot kubuntu cd | ****** boot kubuntu cd | ||
****** start xterm | ****** start xterm | ||
− | + | <pre><nowiki>sudo bash | |
mount /dev/sda1 /mnt | mount /dev/sda1 /mnt | ||
echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ | echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ | ||
− | + | `openssl rsautl -in /mnt/rootkey.enc -decrypt -inkey \ | |
− | + | /mnt/privkey.pem |hexdump -e '"" 32/1 "%02x" "\n"'` \ | |
− | + | 0 /dev/sda3 0 | dmsetup create root | |
umount mnt | umount mnt | ||
mount /dev/mapper/root /mnt | mount /dev/mapper/root /mnt | ||
mount /dev/sda1 /mnt/boot | mount /dev/sda1 /mnt/boot | ||
− | + | ||
chroot /mnt | chroot /mnt | ||
... | ... | ||
− | + | ||
update-initramfs -u | update-initramfs -u | ||
− | + | ||
umount /mnt/boot | umount /mnt/boot | ||
umount /mnt | umount /mnt | ||
sync | sync | ||
</nowiki></pre> | </nowiki></pre> | ||
− | + | ||
− | + | * press ctrl-alt-del and select reboot | |
− | + | ||
=== Other changes === | === Other changes === | ||
− | + | ||
− | + | ** set root password | |
− | + | * boot | |
− | + | * switch to text console | |
− | + | * login as "root" (no password) | |
− | + | * shadowconfig on | |
− | + | * passwd root | |
− | + | ||
− | + | ** create user | |
− | + | <pre><nowiki>adduser user | |
vigr | vigr | ||
− | + | # add user to dialout, fax, voice, cdrom, floppy, sudo, audio, | |
+ | video, scanner, scard | ||
</nowiki></pre> | </nowiki></pre> | ||
[[category:UbuntuHelp]] | [[category:UbuntuHelp]] |
2007年5月24日 (四) 09:37的版本
点击翻译: |
English |
请不要直接编辑翻译本页,本页将定期与来源同步。 |
Here is yet another HOWTO for installing (k)ubuntu 6.06 LTS (dapper) with encrypted root and swap partition. Why yet another? Some highlights of this method:
- Uses RSA keys and thus is ready for smartcards (although in this howto
the RSA private key is still stored on disk as encrypted file)
- Password changes are possible. With LUKS that would be possible too (but no smart card support), with cryptsetup it would not.
Encrypting valuable data is very important for many companies, and it feels a lot better if the whole filesystem is encrypted, not only some partitions (e.g. home - what if you start using some webserver, database etc.). Of course a full encryption of root and swap has significant impact on latency for reading/writing and increased cpu usage for that. But for normal desktop it is not a big deal, but if you copy hundereds of MB of data you will notice it.
This howto is very long, because you need to do many steps yourself that are normaly done by the automatic installer.
How to install Ubuntu encrypted
- Boot from desktop CD
Download this text to the ubuntu system, so you can cut and paste. Open in vi (not less, with less you get cut&paste problems on long lines).
- Start an xterm
- Get a root shell
sudo bash
- load dm-crypt
modprobe dm-crypt
- Partition the system
cfdisk /dev/sda
# or /dev/hda
Create three partitions:
- first partition: linux, 100mb, bootable (/boot)
- second parition: linux, what you prefer (2GB?) (swap)
- third partition: root, rest of the disk (or leave space - however you prefer)
Do not set the second partition to swap, as ubuntu will automatically enable it and thus cause problems.
In this document we will assume:
- /dev/sda1 /boot partition
- /dev/sda2 swap partition
- /dev/sda3 root partition
- Create crypto keys in /tmp (tmpfs, never written anywhere)
cd /tmp openssl genrsa -aes256 -out privkey.pem 2048 dd if=/dev/urandom of=swapkey bs=32 count=1 dd if=/dev/urandom of=rootkey bs=32 count=1 openssl rsautl -in swapkey -out swapkey.enc -inkey privkey.pem -encrypt openssl rsautl -in rootkey -out rootkey.enc -inkey privkey.pem -encrypt rm swapkey rootkey SWAPKEY=`openssl rsautl -in swapkey.enc -decrypt -inkey privkey.pem \ | hexdump -e '"" 32/1 "%02x" "\n"'` ROOTKEY=`openssl rsautl -in rootkey.enc -decrypt -inkey privkey.pem \ | hexdump -e '"" 32/1 "%02x" "\n"'` echo 0 `blockdev --getsize /dev/sda2` crypt aes-cbc-essiv:sha256 \ $SWAPKEY 0 /dev/sda2 0 |dmsetup create swap echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ $ROOTKEY 0 /dev/sda3 0 |dmsetup create root
- Create filesystems
mkfs.ext3 /dev/sda1 # /boot mkswap /dev/mapper/swap # swap mkfs.ext3 /dev/mapper/root # root
- Mount filesystems
mount /dev/mapper/root /mnt mkdir /mnt/boot mount /dev/sda1 /mnt/boot
- Download ar and debootstrap
cd /tmp mkdir download cd download wget http://security.ubuntu.com/ubuntu/pool/main/b/binutils/binutils_2.16.1cvs20060117-1ubuntu2.1_i386.deb wget http://de.archive.ubuntu.com/ubuntu/pool/main/d/debootstrap/debootstrap_0.3.3.0ubuntu2_all.deb dpkg -x binutils*deb x dpkg -x debootstrap*deb x
- install dapper on the crypto root
export LD_LIBRARY_PATH=/tmp/download/x/usr/lib export PATH=/tmp/download/x/usr/bin:$PATH export DEBOOTSTRAP_DIR=/tmp/download/x/usr/lib/debootstrap /tmp/download/x/usr/sbin/debootstrap dapper /mnt http://de.archive.ubuntu.com/ubuntu/
- create an fstab in the chroot
chroot /mnt vi /etc/fstab /dev/sda1 /boot ext3 defaults 0 0 /dev/mapper/root / ext3 defaults 0 0 /dev/mapper/swap swap swap defaults 0 0 none /proc proc defaults 0 0 none /proc/bus/usb usbfs defaults 0 0 none /sys sysfs defaults 0 0 none /dev/shm tmpfs defaults 0 0 none /dev/pts devpts defaults 0 0
- create an apt config file in the chroot
chroot /mnt vi /etc/apt/sources.list deb http://de.archive.ubuntu.com/ubuntu/ dapper main restricted deb http://de.archive.ubuntu.com/ubuntu/ dapper-updates main restricted deb http://de.archive.ubuntu.com/ubuntu/ dapper-security main restricted deb-src http://de.archive.ubuntu.com/ubuntu/ dapper main restricted deb-src http://de.archive.ubuntu.com/ubuntu/ dapper-updates main restricted deb-src http://de.archive.ubuntu.com/ubuntu/ dapper-security main restricted
- update packages, install dselect and kubuntu-destkop
chroot /mnt apt-get update apt-get upgrade apt-get install grub linux-image-686 dmsetup bsdmainutils wipe apt-get install kubuntu-desktop
- configure initramfs-tools for crypt root and swap
chroot /mnt cd /etc/mkinitramfs echo dm-crypt >> modules echo aes >> modules echo sha256 >> modules vi hooks/cryptroot (copy till EOF) #!/bin/sh . /usr/share/initramfs-tools/hook-functions mkdir -p ${DESTDIR}/boot mkdir -p ${DESTDIR}/sbin mkdir -p ${DESTDIR}/usr/bin cp -p /boot/privkey.pem /boot/rootkey.enc /boot/swapkey.enc ${DESTDIR}/boot copy_exec /sbin/blockdev /sbin copy_exec /sbin/dmsetup /sbin copy_exec /usr/bin/openssl /usr/bin copy_exec /usr/bin/hexdump /usr/bin EOF chmod +x hooks/cryptroot vi scripts/local-top/cryptroot (copy till EOF) #!/bin/sh PREREQ="udev" # Output pre-requisites prereqs() { echo "$PREREQ" } case "$1" in prereqs) prereqs exit 0 ;; esac modprobe aes modprobe sha256 modprobe dm-crypt echo "Waiting for crypted root device..." slumber=1800 while [ ${slumber} -gt 0 -a ! -e "/dev/sda3" ]; do /bin/sleep 0.1 slumber=$(( ${slumber} - 1 )) done while test -z "$ROOTKEY" do ROOTKEY=`openssl rsautl -in /boot/rootkey.enc -decrypt -inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 "%02x" "\n"' ` done SECTORS=`blockdev --getsize /dev/sda3` echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $ROOTKEY 0 /dev/sda3 0 \ |dmsetup create root echo "Waiting for crypted swap device..." slumber=1800 while [ ${slumber} -gt 0 -a ! -e "/dev/sda2" ]; do /bin/sleep 0.1 slumber=$(( ${slumber} - 1 )) done while test -z "$SWAPKEY" do SWAPKEY=`openssl rsautl -in /boot/swapkey.enc -decrypt -inkey /boot/privkey.pem < /dev/tty0 2>/dev/tty0 |hexdump -e '"" 32/1 "%02x" "\n"' ` done SECTORS=`blockdev --getsize /dev/sda2` echo 0 $SECTORS crypt aes-cbc-essiv:sha256 $SWAPKEY 0 /dev/sda2 0 \ |dmsetup create swap EOF chmod +x scripts/local-top/cryptroot
- put the crypto keys in place and create a new initramfs
mv /tmp/privkey.pem /tmp/swapkey.enc /tmp/rootkey.enc /mnt/boot/ chroot /mnt update-initramfs -u
- install grub
chroot /mnt update-grub apt-get install kubuntu-grub-splashimages cd /boot/grub cp /lib/grub/i386-pc/* . grub root (hd0,0) setup (hd0) quit
- configure grub
- vi /boot/grub/menu.lst
- add "acpi=off"
- change "root=/dev/mapper/root"
- splash (hd0,0)/grub/splashimages/kubuntugood.xpm.gz
- timeout 15
- default 0
- remove all the unwanted settings
- remove all "savedefault" lines
- remove splash as you want a console to enter your password
- configure grub
- finish installation, reboot
umount /mnt/boot fuser -k /mnt umount /mnt sync
press ctrl-alt-del and select reboot
Tools
- change password on rsa key
su root cd /boot openssl rsa -in privkey.pem -out privkey.new.pem -aes256 wipe privkey.pem mv privkey.new.pem privkey.pem update-initramfs -u
- replace rsa key
su root cd /tmp openssl rsautl -in /boot/rootkey.enc -inkey /boot/privkey.pem \ -decrypt -out rootkey openssl rsautl -in /boot/swapkey.enc -inkey /boot/privkey.pem \ -decrypt -out swapkey openssl genrsa -aes256 -out privkey.pem 2048 openssl rsautl -in swapkey -out swapkey.enc -inkey privkey.pem -encrypt openssl rsautl -in rootkey -out rootkey.enc -inkey privkey.pem -encrypt rm swapkey rootkey mv swapkey.enc rootkey.enc privkey.pem boot update-initramfs -u
- recover with bootcd
- boot kubuntu cd
- start xterm
sudo bash mount /dev/sda1 /mnt echo 0 `blockdev --getsize /dev/sda3` crypt aes-cbc-essiv:sha256 \ `openssl rsautl -in /mnt/rootkey.enc -decrypt -inkey \ /mnt/privkey.pem |hexdump -e '"" 32/1 "%02x" "\n"'` \ 0 /dev/sda3 0 | dmsetup create root umount mnt mount /dev/mapper/root /mnt mount /dev/sda1 /mnt/boot chroot /mnt ... update-initramfs -u umount /mnt/boot umount /mnt sync
- press ctrl-alt-del and select reboot
Other changes
- set root password
- boot
- switch to text console
- login as "root" (no password)
- shadowconfig on
- passwd root
- create user
adduser user vigr # add user to dialout, fax, voice, cdrom, floppy, sudo, audio, video, scanner, scard