# $Id$
#
# This script can be used to calculate hash values for VxWorks passwords.
#
# $Revision$
#

def hashit(inp)
	if inp.length < 8 or inp.length > 120
		raise RuntimeError, "The password must be between 8 and 120 characters"
	end
	sum   = 0
	bytes = inp.unpack("C*")
	bytes.each_index {|i| sum += (bytes[i] * (i + 1)) ^ (i + 1) }
	hackit(sum)
end


def hackit(sum)
	magic = 31695317
	res = ((sum * magic) & 0xffffffff).to_s
	res.unpack("C*").map{ |c|
		c += 0x21 if c < 0x33
		c += 0x2f if c < 0x37
		c += 0x42 if c < 0x39
		c
	}.pack("C*")
end

input = ARGV.shift || "flintstone"
$stderr.puts "[*] Hash for password '#{input}' is #{hashit(input)}"