hlubenow wrote:
ts-dev wrote:
>On Apr 6, 3:19 pm, hlubenow <hluben...@gmx.netwrote:
>>recently there was a thread about hiding the python-script from the
user. The OP could use
Interesting - thanks
Well, testing it, it doesn't seem to work very well ...
It seems, Python-code is rather difficult to obfuscate, probably because
of its clear syntax and indentations. Here's yet another approach:
http://pythonhacker.is-a-geek.net/my...e-0.1.zip/view
>
H.
That didn't work very well either :(.
Ok, but now I can offer a real secure solution:
You can have real encryption in Python using this modules:
http://www.amk.ca/files/python/crypt...o-2.0.1.tar.gz
and
http://sourceforge.net/projects/yawpycrypto
Below I post a code-example that I've written some time ago. With it,
encrypting text is rather easy.
Then you have to program a start-script, that reads in your script and the
decryption-key. The decryption-key must be encrypted too. Such a encrypted
key can be generated by the modules if you don't pass a password to my
function "doEncrypt(). The decryption-key must then be hidden somewhere
within the encrypted program-script. That's because, if the user knows
where to find the key, he can decrypt the program-script.
If your start-script is written, everything should work automatically, one
shouldn't nearly notice the decryption-process.
Ok, here's my example code, how to encrypt and decrypt some text with the
modules:
----------------------------------------------------------------------------
#!/usr/bin/env python
import os
import sys
import base64
from yawPyCrypto.Cipher import DecryptCipher, EncryptCipher
from yawPyCrypto.Cipher import ZipDecryptCipher, ZipEncryptCipher
from yawPyCrypto.Constants import CIPHER_BLOWFISH, MODE_CBC
def doEncrypt(text, passw = None):
e = EncryptCipher(passw, CIPHER_BLOWFISH, MODE_CBC)
e.feed(text)
e.finish()
encryptedtext = e.data
if passw != None:
passwr = passw
else:
passwr = e.password
a = (encryptedtext, passwr)
return a
def doDecrypt(encryptedtext, passw):
d = DecryptCipher(passw)
d.feed(encryptedtext)
d.finish()
decoded = (d.data)
return decoded
# Calling the encryption routine.
# If you just pass the text to encrypt, a password is generated:
a = doEncrypt("For your eyes only !", "Melina")
# Just trying to clean the screen:
if sys.platform == "win32":
os.system("cls")
else:
os.system("clear")
print
print "Hello !"
print
print "I just encrypted some text. It looks like this now:"
print
print base64.b64encode(a[0])
print
print 'Please notice, that I just encoded the text once more using
"base64.b64encode()" to make it printable.'
print
print "The password for decryption is: "
print
print base64.b64encode(a[1])
print
print "Let's decrypt again (the original password must be passed without
b64encoding):"
print
print doDecrypt(a[0], a[1])
print
----------------------------------------------------------------------------
See you
H.
