fix overflow when truncating in submod2k #251
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mratsim
commented
Jul 10, 2023
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| # We can compute (mod 2ʷ) with w >= k | ||
| # Hence we truncate the substraction to the next multiple of the word size | ||
| template trunc(x: openArray[SecretWord]): openArray[SecretWord] = | ||
| x.toOpenArray(0, k.int.wordsRequired()-1) | ||
| let truncHi = min(x.len, k.int.wordsRequired()) - 1 |
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The absence of the min was the main bug
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Fix @guidovranken fuzz failure 8
And separate stack hardening and sanitizers in test cases.
Enable stack hardening on all tests and sanitizers on modexp tests due to the frequent uses of
allocStackArray