On Fri, 31 Mar 2023 at 06:42, Dick Visser <[email protected]> wrote:
>
> Looking at
> https://help.ubuntu.com/community/Grub2/Passwords#Password_Encryption, it 
> seems that grub uses pbkdf2 with sha512, with a fixed number of 10000 rounds.
>
> IIRC python passlib supports that so it should be possible to generate with 
> the ansible password_hash filter:
> https://docs.ansible.com/ansible/latest/collections/ansible/builtin/password_hash_filter.html


Actually, it's not that easy.
I had previously created a filter to generate PBKDF2 hashes for the
"mosquitto" application. Based on that I made a grub_mkpasswd_pbkdf2
filter:

https://gist.github.com/dnmvisser/c567608193ad6bc1465b182e9a58bca7

Example on how to use it:

dick.visser@foobar ~$ ansible -i localhost, all -m debug -a msg="{{
'hackme' | grub_mkpasswd_pbkdf2 }}"
localhost | SUCCESS => {
    "msg": 
"grub.pbkdf2.sha512.10000.380BF76393CDE1AB16ACE9F32AE6DB262FDD43021FEEEC1A94B87F14640F6D09D3D7DA61977BB7A4384766697148758D061E84FD5F81745EDDFF4E4B6C7DB0D0.92DC5B05FED969DB16BC4982B8B23B8B575D12E2ED776A911D7D47901DC5DDD8B4BAD65C535C33900321D050B8BE9BC2A6C3EDF96C1FB0825A0DC54BBBEB2F5B"
}

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