View Full Version : Python password generator
wille.sync
October 27th, 2013, 07:24 PM
Hey fellow Linux users!
I thought that I should share my password generator with you guys.
It produces a password of at least 8 characters (random letters, numbers and special characters(if specified)).
Also, there will be no repeated characters.
The code can be downloaded from my github: https://github.com/wille-dev/genpw
Usage: ./genpw.py [OPTIONS] [LENGTH]
Please let me know what you think :)
lykwydchykyn
October 28th, 2013, 04:25 AM
Not bad; here's a few pointers:
- Python's random module is not recommended for security purposes; it's recommened to use os.urandom() or SystemRandom instead (see the note here: http://docs.python.org/2/library/random.html)
- You might want to look into the built-in "optparse" module to process command line arguments. It's much cleaner and more flexible.
Keep up the coding!
wille.sync
October 28th, 2013, 07:37 PM
Thanks for the tips mate :)
Never seen optparse before, I'll have a look at that.
Regarding the random module, as the purpose is to grab a random item from a list and later checks for duplicates I see no reason in using another function though :/ Unless it somehow produces a tru word...
Anyway, thanks again :)
lykwydchykyn
October 28th, 2013, 08:37 PM
I'm not a cryptology expert, but two points here:
- If you want to make a secure password generator, you need to use a cryptographically secure random source. Otherwise your results will be more easily guessed by brute force attacks. You may not envision this as a possible issue, but the whole point of a password generator is make a more secure (and harder to guess) password than what a user could come up with.
- I'm not sure that avoiding duplicates necessarily makes a more secure password. Seems offhand like it would reduce the overall entropy of the password.
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