Class: Rbkb::Cli::Xor

Inherits:
Executable show all
Defined in:
lib/rbkb/cli/xor.rb

Overview

Copyright 2009 emonti at matasano.com See README.rdoc for license information

Repeating string xor. Takes input from a string, stdin, or a file (-f).

Instance Attribute Summary

Attributes inherited from Executable

#argv, #exit_status, #oparse, #opts, #stderr, #stdin, #stdout

Instance Method Summary collapse

Methods inherited from Executable

#bail, #bail_args, #exit, #initialize, run

Constructor Details

This class inherits a constructor from Rbkb::Cli::Executable

Instance Method Details

#go(*args) ⇒ Object 



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# File 'lib/rbkb/cli/xor.rb', line 36

def go(*args)
  super(*args)
  @opts[:indat] ||= @stdin.read
  @stdout << @opts[:indat].xor(@opts[:key])
  self.exit(0)
end

#make_parser ⇒ Object 



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# File 'lib/rbkb/cli/xor.rb', line 9

def make_parser()
  super()
  add_std_file_opt(:indat)
  arg = @oparse
  arg.banner += " -k|-s <key> <data | stdin>"

  arg.separator "  Key options (you must specify one of the following):"
  arg.on("-s", "--strkey STRING", "xor against STRING")  do |s|
      bail "only one key option can be specified with -s or -x" if @opts[:key]
      @opts[:key] = s
  end

  arg.on("-x", "--hexkey HEXSTR", "xor against binary HEXSTR") do |x|
      bail "only one key option can be specified with -s or -x" if @opts[:key]
      x.sub!(/^0[xX]/, '')
      bail "Unable to parse hex string" unless @opts[:key] = x.unhexify
  end
  return arg
end

#parse(*args) ⇒ Object 



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# File 'lib/rbkb/cli/xor.rb', line 29

def parse(*args)
  super(*args)
  bail("You must specify a key with -s or -x\n#{@oparse}") unless @opts[:key]
  parse_string_argument(:indat)
  parse_catchall()
end