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-<!DOCTYPE html>
-<html>
-<head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1">
-
- <style type="text/css">
- body {
- background:#fff;
- color:#000;
- font-family:sans-serif;
- font-size:1em;
- }
- div.important {
- background-color:#ccc;
- }
- </style>
-
- <title>Installing Trisquel GNU/Linux with full disk encryption (including /boot)</title>
-</head>
-
-<body>
- <header>
- <h1>Installing Trisquel GNU/Linux with full disk encryption (including /boot)</h1>
- <aside>Or <a href="../index.html">back to main index</a></aside>
- </header>
-
- <p>
- Libreboot uses the GRUB <a href="http://www.coreboot.org/Payloads#GRUB_2">payload</a>
- by default, which means that the GRUB configuration file
- (where your GRUB menu comes from) is stored directly alongside libreboot
- and it's GRUB payload executable, inside
- the flash chip. In context, this means that installing distributions and managing them
- is handled slightly differently compared to traditional BIOS systems.
- </p>
-
- <p>
- On most systems, the /boot partition has to be left unencrypted while the others are encrypted.
- This is so that GRUB, and therefore the kernel, can be loaded and executed since the firmware
- can't open a LUKS volume. Not so with libreboot! Since GRUB is already included directly as a
- payload, even /boot can be encrypted. This protects /boot from tampering by someone with physical
- access to the machine.
- </p>
-
- <p>
- This works in Trisquel 7, and probably Trisquel 6. Boot the 'net installer' (Install Trisquel in Text Mode). <a href="grub_boot_installer.html">How to boot a GNU/Linux installer</a>.
- </p>
-
- <p>
- Set a strong user password (ideally above 40 characters, of lowercase/uppercase, numbers and symbols).
- </p>
-
- <p>
- when the installer asks you to setup
- encryption (ecryptfs) for your home directory, select 'Yes' if you want to: <b>LUKS is already secure and performs well. Having ecryptfs on top of it
- will add noticeable performance penalty, for little security gain in most use cases. This is therefore optional, and not recommended.
- Choose 'no'.</b>
- </p>
-
- <p>
- <b>
- Your user password should be different than the LUKS password which you will set later on.
- Your LUKS password should, like the user password, be secure.
- </b>
- </p>
-
- <h1>Partitioning</h1>
-
- <p>Choose 'Manual' partitioning:</p>
- <ul>
- <li>Select drive and create new partition table</li>
- <li>
- Single large partition. The following are mostly defaults:
- <ul>
- <li>Use as: physical volume for encryption</li>
- <li>Encryption: aes</li>
- <li>key size: 256</li>
- <li>IV algorithm: xts-plain64</li>
- <li>Encryption key: passphrase</li>
- <li>erase data: Yes (only choose 'No' if it's a new drive that doesn't contain your private data)</li>
- </ul>
- </li>
- <li>
- Select 'configure encrypted volumes'
- <ul>
- <li>Create encrypted volumes</li>
- <li>Select your partition</li>
- <li>Finish</li>
- <li>Really erase: Yes</li>
- <li>(erase will take a long time. be patient)</li>
- <li>(if your old system was encrypted, just let this run for about a minute to
- make sure that the LUKS header is wiped out)</li>
- </ul>
- </li>
- <li>
- Select encrypted space:
- <ul>
- <li>use as: physical volume for LVM</li>
- <li>Choose 'done setting up the partition'</li>
- </ul>
- </li>
- <li>
- Configure the logical volume manager:
- <ul>
- <li>Keep settings: Yes</li>
- </ul>
- </li>
- <li>
- Create volume group:
- <ul>
- <li>Name: <b>buzz</b> (you can use whatever you want here, this is just an example)</li>
- <li>Select crypto partition</li>
- </ul>
- </li>
- <li>
- Create logical volume
- <ul>
- <li>select <b>buzz</b> (or whatever you named it before)</li>
- <li>name: <b>distro</b> (you can use whatever you want here, this is just an example)</li>
- <li>size: default, minus 2048 MB</li>
- </ul>
- </li>
- <li>
- Create logical volume
- <ul>
- <li>select <b>buzz</b> (or whatever you named it before)</li>
- <li>name: <b>swap</b> (you can use whatever you want here, this is just an example)</li>
- <li>size: press enter</li>
- </ul>
- </li>
- </ul>
-
- <h1>Further partitioning</h1>
-
- <p>
- Now you are back at the main partitioning screen. You will simply set mountpoints and filesystems to use.
- </p>
- <ul>
- <li>
- LVM LV distro
- <ul>
- <li>use as: ext4</li>
- <li>mount point: /</li>
- <li>done setting up partition</li>
- </ul>
- </li>
- <li>
- LVM LV swap
- <ul>
- <li>use as: swap area</li>
- <li>done setting up partition</li>
- </ul>
- </li>
- <li>Now you select 'Finished partitioning and write changes to disk'.</li>
- </ul>
-
- <h1>Kernel</h1>
-
- <p>
- Installation will ask what kernel you want to use. linux-generic is fine.
- </p>
-
- <h1>Tasksel</h1>
-
- <p>
- Choose <i>&quot;Trisquel Desktop Environment&quot;</i> if you want GNOME,
- <i>&quot;Trisquel-mini Desktop Environment&quot;</i> if you
- want LXDE or <i>&quot;Triskel Desktop Environment&quot;</i> if you want KDE.
- If you want to have no desktop (just a basic shell)
- when you boot or if you want to create your own custom setup, then choose nothing here (don't select anything).
- You might also want to choose some of the other package groups; it's up to you.
- </p>
-
- <h1>Postfix configuration</h1>
-
- <p>
- If asked, choose <i>&quot;No Configuration&quot;</i> here (or maybe you want to select something else. It's up to you.)
- </p>
-
- <h1>Install the GRUB boot loader to the master boot record</h1>
-
- <p>
- Choose 'Yes'. It will fail, but don't worry. Then at the main menu, choose 'Continue without a bootloader'.
- You could also choose 'No'. Choice is irrelevant here.
- </p>
-
- <p>
- <i>You do not need to install GRUB at all, since in libreboot you are using the GRUB payload (for libreboot) to boot your system directly.</i>
- </p>
-
- <h1>Clock UTC</h1>
-
- <p>
- Just say 'Yes'.
- </p>
-
- <h1>
- Booting your system
- </h1>
-
- <p>
- At this point, you will have finished the installation. At your GRUB payload, press C to get to the command line.
- </p>
-
- <p>
- Do that:<br/>
- grub&gt; <b>cryptomount -a (ahci0,msdos1)</b><br/>
- grub&gt; <b>set root='lvm/buzz-distro'</b><br/>
- grub&gt; <b>linux /vmlinuz root=/dev/mapper/buzz-distro cryptdevice=/dev/mapper/buzz-distro:root</b><br/>
- grub&gt; <b>initrd /initrd.img</b><br/>
- grub&gt; <b>boot</b>
- </p>
-
- <h1>
- ecryptfs
- </h1>
-
- <p>
- If you didn't encrypted your home directory, then you can safely ignore this section.
- </p>
-
- <p>
- Immediately after logging in, do that:<br/>
- $ <b>sudo ecryptfs-unwrap-passphrase</b>
- </p>
-
- <p>
- This will be needed in the future if you ever need to recover your home directory from another system, so write it down and keep the note
- somewhere secret. Ideally, you should memorize it and then burn the note (or not even write it down, and memorize it still)>
- </p>
-
- <h1>
- Modify grub.cfg (CBFS)
- </h1>
-
- <p>
- Now you need to set it up so that the system will automatically boot, without having to type a bunch of commands.
- </p>
-
- <p>
- Modify your grub.cfg (in the firmware) <a href="grub_cbfs.html">using this tutorial</a>;
- just change the default menu entry 'Load Operating System' to say this inside:
- </p>
-
- <p>
- <b>cryptomount -a (ahci0,msdos1)</b><br/>
- <b>set root='lvm/buzz-distro'</b><br/>
- <b>linux /vmlinuz root=/dev/mapper/buzz-distro cryptdevice=/dev/mapper/buzz-distro:root</b><br/>
- <b>initrd /initrd.img</b>
- </p>
-
- <p>
- Additionally, you should set a GRUB password. This is not your LUKS password, but it's a password that you have to enter to see
- GRUB. This protects your system from an attacker simply booting a live USB and re-flashing your firmware. <b>This should be different than your LUKS passphrase and user password.</b>
- </p>
-
- <p>
- The GRUB utility can be used like so:<br/>
- $ <b>grub-mkpasswd-pbkdf2</b>
- </p>
-
- <p>
- Give it a password (remember, it has to be secure) and it'll output something like:<br/>
- <b>grub.pbkdf2.sha512.10000.711F186347156BC105CD83A2ED7AF1EB971AA2B1EB2640172F34B0DEFFC97E654AF48E5F0C3B7622502B76458DA494270CC0EA6504411D676E6752FD1651E749.8DD11178EB8D1F633308FD8FCC64D0B243F949B9B99CCEADE2ECA11657A757D22025986B0FA116F1D5191E0A22677674C994EDBFADE62240E9D161688266A711</b>
- </p>
-
- <p>
- Put that in the grub.cfg (the one for CBFS inside the ROM) before the 'Load Operating System' menu entry like so (example):<br/>
- </p>
- <pre>
-<b>set superusers=&quot;root&quot;</b>
-<b>password_pbkdf2 root grub.pbkdf2.sha512.10000.711F186347156BC105CD83A2ED7AF1EB971AA2B1EB2640172F34B0DEFFC97E654AF48E5F0C3B7622502B76458DA494270CC0EA6504411D676E6752FD1651E749.8DD11178EB8D1F633308FD8FCC64D0B243F949B9B99CCEADE2ECA11657A757D22025986B0FA116F1D5191E0A22677674C994EDBFADE62240E9D161688266A711</b>
- </pre>
-
- <p>
- Obviously, replace it with the correct hash that you actually got for the password that you entered. Meaning, not the hash that you see above!
- </p>
-
- <p>
- After this, you will have a modified ROM with the menu entry for cryptomount, and the entry before that for the GRUB password. Flash the modified ROM
- using <a href="../index.html#flashrom">this tutorial</a>.
- </p>
-
- <h1>
- Update Trisquel
- </h1>
-
- <p>
- $ <b>sudo apt-get update</b><br/>
- $ <b>sudo apt-get upgrade</b>
- </p>
-
- <h1>
- Conclusion
- </h1>
-
- <p>
- If you followed all that correctly, you should now have a fully encrypted system.
- </p>
-
-<hr/>
-
- <p>
- Copyright &copy; 2014 Francis Rowe &lt;info@gluglug.org.uk&gt;<br/>
- This document is released under the Creative Commons Attribution-ShareAlike 4.0 International Public License and all future versions.
- A copy of the license can be found at <a href="../license.txt">../license.txt</a>.
- </p>
-
- <p>
- This document is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See <a href="../license.txt">../license.txt</a> for more information.
- </p>
-
-</body>
-</html>