[issue40791] hmac.compare_digest could try harder to be constant-time.

[Gregory P. Smith]

Gregory P. Smith <greg at krypto.org> added the comment:


New changeset 31729366e2bc09632e78f3896dbce0ae64914f28 by Devin Jeanpierre in branch 'master':
bpo-40791: Make compare_digest more constant-time. (GH-20444)
https://github.com/python/cpython/commit/31729366e2bc09632e78f3896dbce0ae64914f28


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<https://bugs.python.org/issue40791>
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