-- Testing DES 56
require 'des56'

local key = '&3g4&gs*&3'

assert(des56.decrypt(des56.crypt('', key), key) == '')
assert(des56.decrypt(des56.crypt('', key), key) == '')
assert(des56.decrypt(des56.crypt('a', key), key) == 'a')
assert(des56.decrypt(des56.crypt('1234567890', key), key) == '1234567890')

local msg = string.rep("1233456789\0\1\2\3\0\255", 10000)
local code = des56.crypt(msg, key)

assert(des56.decrypt(code, key) == msg)
assert(des56.crypt('a', '12345678') ~= des56.crypt('a', '87654321'))

local ascii = ""

for i = 0, 255 do
	ascii = ascii..string.char(i)
end

assert(des56.decrypt(des56.crypt(ascii, key), key) == ascii)
key = string.sub(ascii, 2)
assert(des56.decrypt(des56.crypt(ascii, key), key) == ascii)

print"DES56 OK"