cryptsetup
tang
cryptsetup | tang | |
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55 | 11 | |
- | 453 | |
- | 2.0% | |
- | 7.1 | |
- | 3 months ago | |
C | ||
- | GNU General Public License v3.0 only |
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cryptsetup
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The Linux Process Journey — “dmcrypt_write”
Overall, “dm-crypt” is a device-mapper target (https://elixir.bootlin.com/linux/v6.5-rc3/source/drivers/md/dm-crypt.c#L3689) supported from kernel version 2.6.4 (https://elixir.bootlin.com/linux/v2.6.4/source/drivers/md/dm-crypt.c). It is responsible for transparent (aka real-time/on-the-fly encryption) block device encryption while using the kernel crypto API (https://gitlab.com/cryptsetup/cryptsetup/-/wikis/DMCrypt) .
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Most secure and private (trace resistant) messaging app in market?
For more information check section 5.21 Why is there no "Nuke-Option"? of LUKS FAQ.
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Is it possible to make my linux system automatically wipe everything if someone enters a wrong password twice
Please read the section 5.21 Why is there no "Nuke-Option"? of the LUKS FAQ for more information (eg. when a "wipe" option could actually harm you).
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Federal Judge Makes History in Holding That Border Searches of Cell Phones Require a Warrant
Check out the section 5.2 and 5.18 of the LUKS FAQ for more information.
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Custom Encryption
See section 5.2 of LUKS FAQ and Key disclosure law all over the world.
- Encryption of boot issue in the process: failed at update-grub
- Cannot create dm-integrity block device
- LuKs cryptsetup and sha256
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Can I only partially clone a LUKS encrypted drive?
References: - Frequently Asked Questions Cryptsetup/LUKS - Question 2.15: "neither dm-crypt nor LUKS1 stores partition size and LUKS2 uses a generic "whole device" size as default." - Stackexchange: What does cryptsetup resize do if LUKS doesn't store partition size?
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Is it possible to create a directory that is automatically encrypted at rest?
LUKS is probably what you want
tang
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Can I boot an encrypted system by pulling the key from another PC?
Have a look at clevis and tang. These allow you do have one server - which could be your remote you want to pull from - to be source of the LUKS decryption on the system using tang.
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PSA: Upgrade your LUKS key derivation function
I found that running tang[1] at home and needing to decrypt that box (can be a Pi or whatever) requiring a complex passphrase is very sufficient. You can even just unplug it at night if it makes you sleep better.
https://github.com/latchset/tang
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How to mount LUKS encrypted USB storages (and HDDs inserted to hot swappable drive bay) automatically when connected? The machine is running headlessly, does not have desktop environments installed.
There are 3 ways to unlock a volume in a headless environment: - use a keyfile, located on an already available volume - use your device's TPM and utilize systemd-cryptenroll - use Clevis/Tang to unlock volumes remotely
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is possible to encrypt disk without asking for password on boot?
This is why on headless servers you use tang (ideally, multiple tang servers)
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Tang on OPNSense
Sharing my notes on running a Tang server on OPNSense, in case it is useful for somebody else.
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PSA: If you have a LUKS encrypted system and a TPM2 chip, you can put it to good use
We use clevis against multiple tang servers to provide Network Bound Disk Encryption (NBDE). It's possible to also use TPM2 but it's easier to use multiple tang servers (requiring more than one server to decrypt) in the datacenter.
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A lot of questions about Self hosting :)
For automating unlocking of encrypted drives, look into tang . Here is a red hat guide on setting it up. You will want to be running this on another device on your network, i run it on my router with openwrt since its a local device thats on 24/7. Basically it will unlock your disks as long as your server is on your network, so if your machine or drives are stolen or removed from your network they will just be encrypted as usual. Obviously use a strong encryption password.
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Systemd 250 released
There are other ways to bind data, e.g. "network binding" with Tang server.
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Best Evil Maid prototcol for Linux?
I wonder if https://github.com/latchset/clevis and https://github.com/latchset/tang (complementary projects) will help here.
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Luks Root Encryption
Yes you can, using either Mandos or Clevis and Tang. https://www.recompile.se/mandos https://github.com/latchset/clevis https://github.com/latchset/tang. Basically on boot the server gets the key from another(s) servers. You could use a hidden raspberry pi for example.
What are some alternatives?
sedutil - DTA sedutil Self encrypting drive software
clevis - Automated Encryption Framework
LUKS2-docs
sedutil - Use sedutil for setting up and using self encrypting drives (SEDs) that comply with the TCG OPAL 2.00 standard. This includes the requisite pre-boot authentication image.
luks.go - Pure Golang library to manage LUKS partitions
docker-traefik - Docker media and home server stack with Docker Compose, Traefik, Swarm Mode, Google OAuth2/Authelia, and LetsEncrypt
go-cryptsetup - Go bindings for libcryptsetup.
booster - Fast and secure initramfs generator
edgewalker - A DIY VPN setup script based on OpenBSD, OpenIKEd, Wireguard and Let's Encrypt
systemd - systemd upstream
sbctl - :computer: :lock: :key: Secure Boot key manager
linux-luks-tpm-boot - A guide for setting up LUKS boot with a key from TPM in Linux