get MD5-Hash from /etc/shadow file

[markus sesser <security () sesser eu>]

Hi,

is it possible to get the md5 hash of shadow password?

root:$1$GXJzVR5J$vS4wC7AW6hV8TvLu6Dtxt.:13979:0:::::

i'm looking not for a tool like john, crack, ...
i want to have a step by step instruction to get the md5 hash.

what i know:
the relevant sting: $1$GXJzVR5J$vS4wC7AW6hV8TvLu6Dtxt.
salt with optinal '$' at the end: GXJzVR5J$

how to get the password/md5 (which is test) from this string: 
vS4wC7AW6hV8TvLu6Dtxt.

and what about the crypt() function?

rgds markus

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