OATH HOTP/TOTP implementation in python
based on http://tools.ietf.org/html/rfc4226 http://tools.ietf.org/html/rfc6238
parameter and function names kept inline with the rfc (e.g. hotp, truncate, k, c etc)
also including a simple unit test based on test vectors in the RFC
pip install hotpiefrom hotpie import HOTP, TOTP
key = 'secret'
HOTP(key, 0) # '814628'
HOTP(key, 0, digits=8) # '31814628'
HOTP(key, 13, digits=8) # '81315566'
TOTP(key, digits=6) # <time-based-value>
# you can also use different hash implementations by passing `digestmod`
# (RFC4226 only specifies SHA-1,
# but RFC6238 explicitly mentions SHA-256 and SHA-512)
from hashlib import sha512, sha256
HOTP(key, 0, digits=8, digestmod=sha512)
TOTP(key, digits=8, digestmod=sha256)To run the tests, simply run python ./hotpie.py