Module: Kh2hc

Defined in:
lib/kh2hc.rb,
lib/kh2hc/cli.rb,
lib/kh2hc/version.rb

Overview

known_hosts to Hashcat

Defined Under Namespace

Modules: CLI

Constant Summary collapse

VERSION =

Version of Kh2hc library and app

'0.0.2'

Class Method Summary collapse

Class Method Details

.convert(khfile) ⇒ Array<Hash>

Convert OpenSSH known_hosts file hashed with HashKnownHosts to an array of hashes crackable by Hashcat.

Parameters:

  • khfile (String) —

    OpenSSH known_hosts file

Returns:

  • (Array<Hash>) —

    An array of Hash. Each Hash has two keys: the :hash of the host hash,
    the :salt of the host hash



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# File 'lib/kh2hc.rb', line 15

def self.convert(khfile)
  data = File.read(khfile)
  # |<Magic string>|<salt>|<hash> <key algorithm> <public key sig.>
  data.scan(/^\|1\|([^|]+)\|([^|].+) .+ .+$/).map do |host|
    # hash:salt
    { hash: host[1].from_b64.to_hex, salt: host[0].from_b64.to_hex }
  end
end

.convert1(khfile) ⇒ String

Convert OpenSSH known_hosts file hashed with HashKnownHosts to a hash file crackable by Hashcat.

Parameters:

  • khfile (String) —

    OpenSSH known_hosts file

Returns:

  • (String) —

    hash file in Hashcat format



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# File 'lib/kh2hc.rb', line 27

def self.convert1(khfile)
  hc_out = convert(khfile).map do |host|
    "#{host[:hash]}:#{host[:salt]}"
  end
  hc_out.join("\n")
end

.hashed?(khfile) ⇒ Boolean

Check if OpenSSH known_hosts is hashed with HashKnownHosts option or not.

Parameters:

  • khfile (String) —

    OpenSSH known_hosts file

Returns:

  • (Boolean) —

    true is hashed



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# File 'lib/kh2hc.rb', line 37

def self.hashed?(khfile)
  File.open(khfile) do |f|
    return f.read(3) == '|1|'
  end
  # Resources friendly version of:
  # data = File.read(khfile)
  # /\A\|1\|/.match?(data)
end