Bug#1121980: dropbear-initramfs: Can't put password through stdin to unlock LUKS partition since Debian 13

[Guilhem Moulin]

On Fri, 05 Dec 2025 at 21:08:24 +0100, Matthieu Meurillon wrote:
> matthieu@terminator:~$ ssh -T root@192.168.1.100 <<<'passphrase'

Oh my bad, here strings add a linefeed which is passed along with the
passphrase.  That linefeed is trimmed when using the interactive mode,
see the “Passphrase processing for LUKS” section in cryptsetup(8).

How about

    printf '%s' "$REAL_PASSPHRASE" | ssh -T root@192.168.1.100

or

    printf '%s' "$REAL_PASSPHRASE" | ssh root@192.168.1.100 /nonexistent

-- 
Guilhem.

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