this post was submitted on 13 May 2024
53 points (100.0% liked)

Linux

1258 readers
96 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago
MODERATORS
 

I wanted to install Debian Linux after a weird journey with Gentoo Linux. My partition layout is this:

  • Boot Partition (512 MiB, mount at /boot)
  • Swap Partition (4 GiB)
  • Root Partition (~80 GiB, mount at /)
  • Home Partition (~170 GiB, mount at /home, LUKS encrypted)

While trying to preserve the home partition, I think I clicked 'Configure encrypted partitions' on the Debian installer and then set a password for it (the same that it had before).

Now, I can unlock it like before, but after it is unlocked, no utility recognizes the filesystem (ext4) and the file command reports it as being data:

# file -s -L /dev/mapper/home
/dev/mapper/home: data

file on the encrypted partition returns the following:

# file -s /dev/nvme0n1p4
/dev/nvme0n1p4: LUKS encrypted file, ver 2, header size 16384, ID 3, algo sha256, salt 0x590d84c0e8397ad0..., UUID: c5ff37db-11f7-4ccf-8869-c4bc22648202, crc 0x345f75d85c9f444a..., at 0x1000 {"keyslots":{"0":{"type":"luks2","key_size":64,"af":{"type":"luks1","stripes":4000,"hash":"sha256"},"area":{"type":"raw","offse

(This is the complete output, it cuts at offset for some reason)

My luksDump output is this:

# cryptsetup luksDump /dev/nvme0n1p4
LUKS header information
Version:       	2
Epoch:         	3
Metadata area: 	16384 [bytes]
Keyslots area: 	16744448 [bytes]
UUID:          	c5ff37db-11f7-4ccf-8869-c4bc22648202
Label:         	(no label)
Subsystem:     	(no subsystem)
Flags:       	(no flags)

Data segments:
  0: crypt
	offset: 16777216 [bytes]
	length: (whole device)
	cipher: aes-xts-plain64
	sector: 512 [bytes]

Keyslots:
  0: luks2
	Key:        512 bits
	Priority:   normal
	Cipher:     aes-xts-plain64
	Cipher key: 512 bits
	PBKDF:      argon2id
	Time cost:  6
	Memory:     1048576
	Threads:    4
	Salt:       18 b4 a6 e9 87 1f 94 f6 7d 96 f2 9c 0f 2e ca 75 
	            e6 0f 80 7d 09 70 40 19 d0 a4 a1 49 ff 5c 1c 0b 
	AF stripes: 4000
	AF hash:    sha256
	Area offset:32768 [bytes]
	Area length:258048 [bytes]
	Digest ID:  0
Tokens:
Digests:
  0: pbkdf2
	Hash:       sha256
	Iterations: 171785
	Salt:       c2 b0 a6 f5 e1 bf 5f 85 82 b1 d5 f3 10 c6 ae b7 
	            7c fc 50 41 c5 a6 03 f6 5a bd ac df 46 89 7b c6 
	Digest:     57 7d fb 87 69 c5 58 07 cf 82 88 5e f8 c6 39 f5 
	            7d 00 ec 07 e0 df b8 ee b5 dd ff 20 bf b3 bc 01

My guess is that I re-encrypted the already encrypted partition. Also, I noticed that the UUID changed. Can anyone help me recover it? Thanks in advance.

If you need more logs, I will happily provide them to you.

you are viewing a single comment's thread
view the rest of the comments
[–] BCsven@lemmy.ca 7 points 6 months ago

I am not a cryptographic expert, but it sounds like you may have built a new key, and old files would be inaccessible...or that the option you chose does a file directory wipe.