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#!/usr/bin/env ruby
module CiscoType7
MAGIC="dsfd;kfoA,.iyewrkldJKDHSUBsgvca69834ncxv9873254k;fg87"
def CiscoType7.encode(pass, salt = (0..15).to_a.sample)
out = "%02d" % salt
(0...pass.length).each do |i|
j = (i + salt) % 53
byte = pass[i].ord ^ MAGIC[j].ord
out += "%02X" % byte
end
return out
end
def CiscoType7.decode(hash)
out = ""
salt = hash[0..1].to_i
pass = hash[2..-1]
(0...(pass.length/2)).each do |i|
j = (i + salt) % 53
byte = pass[(i*2)..((i*2)+1)].to_i(16) ^ MAGIC[j].ord
out += byte.chr
end
return out
end
def CiscoType7.test_equal(hash1, hash2)
return decode(hash1) == decode(hash2)
end
end
def mode_looks_like(args)
return :equal if args.length == 2
return :decode if args[0] =~ /^(0[0-9]|1[0-5])([0-9A-F]{2})+$/
return :encode
end
require 'optparse'
options = {:mode => :magic}
OptionParser.new do |opts|
opts.banner = "Usage: type7 [options] ARG1 [ARG2]"
opts.on("-e", "--encode", "Encode mode") do
options[:mode] = :encode
end
opts.on("-d", "--decode", "Decode mode") do
options[:mode] = :decode
end
opts.on("-q", "--equal", "Test equality mode") do
options[:mode] = :equal
end
opts.on("-h", "--help", "Display help") do
puts opts.banner
puts opts.summarize
puts "The default mode is magic mode, where type7 will work out what you want to do."
exit 0
end
end.parse!
options[:mode] = mode_looks_like(ARGV) if options[:mode] == :magic
case options[:mode]
when :encode
puts CiscoType7::encode(ARGV[0])
when :decode
puts CiscoType7::decode(ARGV[0])
when :equal
puts CiscoType7::test_equal(ARGV[0], ARGV[1]) ? "Match" : "Differ"
end
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