fix: twistedEdwards zero affine point conversion to projective

mratsim · Jun 27, 2024 · c1da0b0 · c1da0b0
1 parent b5e5ad6
commit c1da0b0
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/constantine/math/elliptic/ec_twistededwards_projective.nim b/constantine/math/elliptic/ec_twistededwards_projective.nim
@@ -461,6 +461,11 @@ func fromAffine*[F](
   proj.y = aff.y
   proj.z.setOne()
 
+  let inf = aff.isNeutral()
+  proj.x.csetZero(inf)
+  proj.y.csetOne(inf)
+  proj.z.csetOne(inf)
+
 # Vartime overloading
 # ------------------------------------------------------------
 # For generic vartime operations on both ShortWeierstrass curves and Twisted Edwards