Theo Buehler 0e4e058602
[3.10] gh-98517: Fix buffer overflows in _sha3 module (#98519)
This is a port of the applicable part of XKCP's fix [1] for
CVE-2022-37454 and avoids the segmentation fault and the infinite
loop in the test cases published in [2].

[1]: fdc6fef075
[2]: https://mouha.be/sha-3-buffer-overflow/

Regression test added by: Gregory P. Smith [Google LLC] <greg@krypto.org>
2022-10-21 12:26:01 -07:00
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