nistec has Incorrect Calculation in Multiplication of unreduced P-256 scalars
Multiplication of certain unreduced P-256 scalars produce incorrect results. There are no protocols known at this time that can be attacked due to this. From the fix commit notes: Unlike the rest of nistec, the P-256 assembly does not use complete addition formulas, meaning that p256PointAdd[Affine]Asm won't return the correct value if the two inputs are equal. This was (undocumentedly) ignored in the scalar multiplication loops because as long as …