import binascii
import struct
from binascii import hexlify, unhexlify

# XOR data
def xor_byte(byte):
    s1 = byte
    s2 = "ff"
    return hexlify(''.join(chr(ord(c1) ^ ord(c2)) for c1, c2 in zip(unhexlify(s1[-len(s2):]), unhexlify(s2))))

def xor_data(hex_data):
    result = []
    for b in range( len(hex_data)/2 ):
        xored_byte = xor_byte( hex_data[2*b:2*(b+1)] )
        result.append(xored_byte)
    return "".join(result)

# Read data
with open('onion3.txt') as in_file:
    hex_data = in_file.read()

# Unhexlify the data.
#bin_data = unhexlify( xor_data(hex_data.replace('\r\n','')) )
bin_data = unhexlify( hex_data.replace('\r\n','') )

# Write out the JPEG.
with open('onion3.jpg', 'wb') as out_file:
    out_file.write(bin_data)