2d9e240fb6 [hashes] Use `fixed_time_eq` for `Hmac::eq` (Matt Corallo)
7ac7273013 [hashes] Disable fixed-time equality cmp when building for fuzzers (Matt Corallo)
Pull request description:
Fuzzers want to break memcmp calls into separate comparisons for coverage monitoring, allowing them to not-quite-brute-force find inputs that fully match. Thus, we disable our fancy fixed-time comparison when built with the `hashes_fuzz` cfg.
ACKs for top commit:
Kixunil:
ACK 2d9e240fb6
apoelstra:
ACK 2d9e240fb6ae13e6139713f9bb8ccb51e5dc0bff; successfully ran local tests
Tree-SHA512: 372e344ae5497a10ca03a50baadb9d2e8a6dac914bbc4ca91fd5c9b839fb036f42c8b47c252ca3466c15286e889a6f5b51390cc0d938ba24dc50b13e8b863463
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