simple HMAC Authentication in Python.
PyAuthTicket uses HMAC to generate a one time ticket based on a secret key, message (optional) and timestamp (defaults to the current time). If both sides know a secret key (ie, an API key), a receiver can verify the identity of a sender by requiring a ticket digest and the timestamp used to create it along with the actual request. To verify the sender, the receiver would create a ticket with the same credentials (key, request, timestamp) and verify it against the provided digest. This does not prevent replay attacks but as the timestamp is provided, a lower threshold can be set to reduce the time window in which replays can run.
released on 16 September 2008
This entry (in part or in whole) was last reviewed on 5 March 2010.
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