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gh-72570: mention the incompatibility of XOFs with HMAC (#136676)

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Bénédikt Tran 2025-07-15 14:03:21 +02:00 • committed by GitHub
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Doc/library/hmac.rst
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@ -12,6 +12,9 @@
--------------
This module implements the HMAC algorithm as described by :rfc:`2104`.
The interface allows to use any hash function with a *fixed* digest size.
In particular, extendable output functions such as SHAKE-128 or SHAKE-256
cannot be used with HMAC.
.. function:: new(key, msg=None, digestmod)