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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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module MetasploitModule
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  CachedSize = 0
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  include Msf::Payload::Single
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  include Msf::Payload::Generic
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  def initialize(info = {})
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    super(
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      merge_info(
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        info,
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        'Name' => 'Custom Payload',
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        'Description' => %q{
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          Use custom string or file as payload. Set either PAYLOADFILE or
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          PAYLOADSTR.
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        },
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        'Author' => 'scriptjunkie <scriptjunkie[at]scriptjunkie.us>',
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        'License' => MSF_LICENSE,
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        'Payload' => {
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          'Payload' => '' # not really
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        }
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      )
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    )
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    # Register options
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    register_options(
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      [
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        OptString.new('PAYLOADFILE', [ false, 'The file to read the payload from' ]),
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        OptString.new('PAYLOADSTR', [ false, 'The string to use as a payload' ])
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      ]
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    )
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  end
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  #
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  # Construct the payload
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  #
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  def generate(_opts = {})
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    if datastore['ARCH']
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      self.arch = actual_arch
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    end
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    if datastore['PAYLOADSTR']
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      datastore['PAYLOADSTR']
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    elsif datastore['PAYLOADFILE']
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      File.binread(datastore['PAYLOADFILE'])
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    else
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      ''
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    end
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  end
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  # Only accept the "none" encoder
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  def compatible_encoders
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    encoders = super()
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    encoders2 = []
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    encoders.each do |encname, encmod|
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      encoders2 << [encname, encmod] if encname.include? 'none'
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    end
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    return encoders2
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  end
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end
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