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Parse Fernet tokens as much as possible without using a key.

Project description

A Python library to parse Fernet tokens as much as possible without using a key. This is useful for doing limited, non-cryptographic validation or introspection of Fernet tokens.

Usage

>>> token = 'gAAAAAAdwJ6wAAECAwQFBgcICQoLDA0ODy021cpGVWKZ_eEwCGM4BLLF_5CV9dOPmrhuVUPgJobwOz7JcbmrR64jVmpU4IwqDA=='
>>> import keyless_fernet
>>> t = keyless_fernet.Token(token)  # tokens are validated on init
>>> t.validate(ttl=60)  # but you can also validate a token against any TTL
>>> t.version  # retrieve the token's version, as an integer
128
>>> t.timestamp  # retrieve the token's timestamp, as a datetime
datetime.datetime(1985, 10, 26, 8, 20)
>>> t.iv  # and see the hex representations of the other attributes
'000102030405060708090a0b0c0d0e0f'
>>> t.ciphertext
'2d36d5ca46556299fde13008633804b2'
>>> t.hmac
'c5ff9095f5d38f9ab86e5543e02686f03b3ec971b9ab47ae23566a54e08c2a0c'

Testing

https://travis-ci.org/dolph/keyless-fernet.svg?branch=master

No external testing dependencies are required:

$ python -m unittest discover

Project details


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