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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.


>>> 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
>>> 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
>>> t.ciphertext
>>> t.hmac


No external testing dependencies are required:

$ python -m unittest discover

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Files for keyless_fernet, version 1.0.0
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