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needhelp

Member

Registered: 2026-05-28

Posts: 1

luks incorrect passphrase

Hello, I need some help.

After an unclean shutdown, my luks passphrase is incorrect. I tried a livecd as well, the password is correct, also the keyboard layout.

The output of cryptsetup luksDump is:

LUKS header information
Version:       	2
Epoch:         	3
Metadata area: 	16384 [bytes]
Keyslots area: 	16744448 [bytes]
UUID:          	864d8d14-2d9c-448a-a9f2-5f11440a12e0
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:  4
	Memory:     365103
	Threads:    2
	Salt:       01 9a ad 05 15 09 21 cd 64 2d 14 c9 15 aa b9 e2 
	            f2 34 d1 26 85 97 b4 5c 2d 3e fa fd 45 bc 29 0c 
	AF stripes: 4000
	AF hash:    sha256
	Area offset:32768 [bytes]
	Area length:258048 [bytes]
	Digest ID:  0
Tokens:
Digests:
  0: pbkdf2
	Hash:       sha256
	Iterations: 87849
	Salt:       ab 15 4f 98 ca d7 62 23 d2 b1 94 e8 1c 11 40 d8 
	            8c 9f 31 cd 33 df b3 66 7f ad a7 df 34 c5 5b 6b 
	Digest:     07 f7 79 fd 00 85 6b bc ef 24 7f 79 40 1d 51 51 
	            09 9f 0c 36 97 49 1c 0a cd 3a 21 89 7d 51 6a c4 

Is there anything I can do? Please and thank you.

Last edited by needhelp (2026-05-28 08:48:49)

frostschutz

Member

Registered: 2013-11-15

Posts: 1,646

Re: luks incorrect passphrase

Does the system pass a memtest86+ run? argon2 frequently fails with bad ram involved. You can also try to open the header on another machine, if available.

There were a couple other threads about luks passphrase issues, example https://bbs.archlinux.org/viewtopic.php?id=312370

Other than checking for hardware problems and obvious corruption, there is not much you can do.

Last edited by frostschutz (2026-05-28 10:00:12)