7zip Cracking on the cheap

7zbrute.rb

#!/usr/bin/env ruby

# Need some help with this cracking script.
# Problems:
#  1) Slow, going through a large list like Rockyou takes forever
#  2) If there is no header encryption, 7z extracts to the target location
#     then tries to decrypt, so threading would be painful
#  3) I need to know when the correct password is used and due to #2
#     with threading that would be very difficult.

require 'shellwords'

wordlist = File.open('/usr/share/wordlists/rockyou.txt','r')

wordlist.each_line do |line|
	puts "Testing #{line.strip.inspect}"

	result = %x[7z e -p#{Shellwords.escape(line.chomp!)} -w/tmp/zip/temp/ -o/tmp/zip/ -y Secret.7z]
	if result =~ /CRC\ Failed/
		puts result
	elsif result =~ /Wrong\ password/
		puts result
	else
		puts "Success with #{line}"
		exit
	end
end