The NAF computation can generate a 1 in the last digit (only) when s = 2^255-1,
so someone who manually constructed the value s = 2^255-1 and fed it into a NAF-using
computation could generate an incorrect result. Some version of this bug has
been present from the beginning of the library, but it has no security content,
because the NAF computations are not applied to secret data, and the error
occurs only on one value which is not constructed by any client caller.
This begins to attempt to restructure the source tree so that the common parts
are common and the different parts are different.
The backend is now split into two parts:
- serial (containing the implementation using serial formulas and mixed-model arithmetic).
- vector (containing the implementation using parallel formulas and single-model arithmetic).
The serial scalar_mul tree is now under backend::serial::scalar_mul.
The avx2 scalar_mul tree is now under backend::avx2::scalar_mul.
2019-01-18 01:49:40 -08:00
Renamed from src/backend/avx2/scalar_mul/vartime_double_base.rs (Browse further)
