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 



36
37
38
39
40
41
 
# 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 



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
# 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
  arg
end

#parse(*args) ⇒ Object 



29
30
31
32
33
34
 
# 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