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I am trying to decrypt a fully encrypted system using LUKS over SSH. I followed stinky parkia's guide to unlocking device over ssh.

However, the password is not working. I am able to reach the prompt to enter the passphrase but it's simply not accepting the correct password. Error: cryptsetup: cryptsetup failed, bad password or options?,

I type the same password with a keyboard attached directed with the Pi4 and it works.

I little more research showed initramfs option is required in crypttab.

Updated crypttab:

# <target name> <source device> <key file> <options> sdcard /dev/mmcblk0p2 none luks,initramfs

However, the password is still not working over SSH.

Any hints on what I am possibly doing wrong?

Details:

  1. uname -a: Linux raspi 6.1.21-v8+ #1642 SMP PREEMPT aarch64
  2. OS: Raspberry OS lite
  3. cryptsetup --version: cryptsetup 2.3.7

Update #1: Found similar instructions on a linuxconfig.org blog, same problem.

Update #2: I thought the keyboard layout is different, but I typed the password in plain text and all characters are as expected.

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  • I think it's one of these cases where the kernel can only return a numeric error code that doesn't convey much information, and the only place where it can convey information is in logs. So check the kernel logs with dmesg. Commented Apr 26, 2023 at 10:33
  • Hi @Gilles'SO-stopbeingevil', I tried to look at the logs at the time of login attempts. But dmesg does not have any cryptsetup related logs. Do I need to enable the logs somewhere? Commented Apr 29, 2023 at 15:01

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