diff options
| -rw-r--r-- | src/lib/math/bigint/bigint.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/lib/math/bigint/bigint.cpp b/src/lib/math/bigint/bigint.cpp index 28fe68f00..caa78de45 100644 --- a/src/lib/math/bigint/bigint.cpp +++ b/src/lib/math/bigint/bigint.cpp @@ -314,8 +314,10 @@ void BigInt::const_time_lookup(secure_vector<word>& output, BOTAN_ASSERT(vec[i].size() >= words, "Word size as expected in const_time_lookup"); + const word mask = CT::is_equal(i, idx); + for(size_t w = 0; w != words; ++w) - output[w] |= CT::select<word>(CT::is_equal(i, idx), vec[i].word_at(w), 0); + output[w] |= CT::select<word>(mask, vec[i].word_at(w), 0); } CT::unpoison(idx); |