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multiexp: fix maxscalar off by one

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Reported by QuarksLab.
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moneromooo-monero 2018-07-25 21:56:39 +01:00
parent 7ed496cc78
commit a129bbd944
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1 changed files with 1 additions and 1 deletions
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src/ringct/multiexp.cc
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@ -605,7 +605,7 @@ rct::key pippenger(const std::vector<MultiexpData> &data, const std::shared_ptr<
maxscalar = data[i].scalar; maxscalar = data[i].scalar;
} }
size_t groups = 0; size_t groups = 0;
while (groups < 256 && pow2(groups) < maxscalar) while (groups < 256 && !(maxscalar < pow2(groups)))
++groups; ++groups;
groups = (groups + c - 1) / c; groups = (groups + c - 1) / c;