Bruteforcing a xor key char

brute.py

import sys
import string

data = 'e7225ea6c31ec63e843f53e3da21e104c5611c80c82cea02e7225ea6c31dea13d12955b7c819e604cc165da0d927e115e83e5db1df27e117855b'.decode('hex')

data = bytearray(data)


deciphered = ['Cy',' d','a:','Cy','ur','hM','Le','!\x00']

chrset = string.ascii_lowercase+string.digits+string.ascii_uppercase+'!'+'\x00'+':'+' '+'_'+'@'
print chrset
ofs = 2
for i in range(255):
	r = ''
	n = ~i
	for k in range(0,len(data)-ofs,8):
		r += deciphered[k/8]
		r += chr((data[k+ofs] ^ i) & 255)
		r += chr((data[k+ofs+1] ^ n) & 255)
		r += '    '
	r += deciphered[7]
	if all(c in chrset for c in r):
		print hex(i), r#, r.encode('hex')