Extract passphrase hash

[Thomas White]

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Hi,

I have a private key I am trying to recover the passphrase hash from
to try and then use in conjunction with another tool (hashcat?) to
recover the passphrase on a GPU cluster I have.

How would one go about extracting the passphrase hash from the private
key?

Regards,
T
- -- 
Activist, anarchist and a bit of a dreamer.
Keybase: https://keybase.io/thomaswhite

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