class Obfuscator:
""" A simple obfuscator class using repeated xor """
def __init__(self, data):
self._string = data
def obfuscate(self):
"""Obfuscate a string by using repeated xor"""
out = ""
data = self._string
a0=ord(data[0])
a1=ord(data[1])
e0=chr(a0^a1)
out += e0
x=1
eprev=e0
while x<len(data):
ax=ord(data[x])
ex=chr(ax^ord(eprev))
out += ex
#throw some chaff
chaff = chr(ord(ex)^ax)
out += chaff
eprev = ex
x+=1
return out
def unobfuscate(self):
""" Reverse of obfuscation """
out = ""
data = self._string
x=len(data) - 2
while x>1:
apos=data[x]
aprevpos=data[x-2]
epos=chr(ord(apos)^ord(aprevpos))
out += epos
x -= 2
#reverse string
out2=""
x=len(out)-1
while x>=0:
out2 += out[x]
x -= 1
out=out2
#second character
e2=data[2]
a2=data[1]
a1=chr(ord(a2)^ord(e2))
a1 += out
out = a1
#first character
e1=out[0]
a1=data[0]
a0=chr(ord(a1)^ord(e1))
a0 += out
out = a0
return out
def main():
testString="Python obfuscator"
obfuscator = Obfuscator(testString)
testStringObf = obfuscator.obfuscate()
print testStringObf
obfuscator = Obfuscator(testStringObf)
testString = obfuscator.unobfuscate()
print testString
if __name__=="__main__":
main()
