[issue40645] Use OpenSSL's HMAC API

[Erlend E. Aasland]

Change by Erlend E. Aasland <erlend.aasland at innova.no>:


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nosy: +erlendaasland
nosy_count: 6.0 -> 7.0
pull_requests: +24718
pull_request: https://github.com/python/cpython/pull/26079

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40645>
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