Write out "Point at Infinity"

diff --git a/src/crypto/ec.rs b/src/crypto/ec.rs
index 0908e33694e1eebd9425f1a3c6e86e0aa75bf81b..f1167671ffe275b7fb32f05a79c99d726f139040 100644 (file)
--- a/src/crypto/ec.rs
+++ b/src/crypto/ec.rs
@@ -173,7 +173,7 @@ impl<C: Curve + ?Sized> Point<C> {
                let s1 = self.y.mul(&o.z.mul(&o_z_2));
                let s2 = o.y.mul(&self.z.mul(&self_z_2));
                if u1 == u2 {
-                       if s1 != s2 { /* PAI */ return Err(()); }
+                       if s1 != s2 { /* Point at Infinity */ return Err(()); }
                        return self.double();
                }
                let h = u2.sub(&u1);
@@ -218,11 +218,11 @@ fn add_two_mul<C: Curve>(i: C::ScalarField, I: &Point<C>, j: C::ScalarField, J:
                        }
                        if i_bit {
                                if let Ok(res) = res_opt.as_mut() {
-                                       // The wycheproof tests expect to see signatures pass even if we hit PAI on an
-                                       // intermediate result. While that's fine, I'm too lazy to go figure out if all
-                                       // our PAI definitions are right and the probability of this happening at
-                                       // random is, basically, the probability of guessing a private key anyway, so
-                                       // its not really worth actually handling outside of tests.
+                                       // The wycheproof tests expect to see signatures pass even if we hit Point at
+                                       // Infinity (PAI) on an intermediate result. While that's fine, I'm too lazy to
+                                       // go figure out if all our PAI definitions are right and the probability of
+                                       // this happening at random is, basically, the probability of guessing a private
+                                       // key anyway, so its not really worth actually handling outside of tests.
                                        #[cfg(test)] {
                                                res_opt = res.add(I);
                                        }
@@ -235,11 +235,11 @@ fn add_two_mul<C: Curve>(i: C::ScalarField, I: &Point<C>, j: C::ScalarField, J:
                        }
                        if j_bit {
                                if let Ok(res) = res_opt.as_mut() {
-                                       // The wycheproof tests expect to see signatures pass even if we hit PAI on an
-                                       // intermediate result. While that's fine, I'm too lazy to go figure out if all
-                                       // our PAI definitions are right and the probability of this happening at
-                                       // random is, basically, the probability of guessing a private key anyway, so
-                                       // its not really worth actually handling outside of tests.
+                                       // The wycheproof tests expect to see signatures pass even if we hit Point at
+                                       // Infinity (PAI) on an intermediate result. While that's fine, I'm too lazy to
+                                       // go figure out if all our PAI definitions are right and the probability of
+                                       // this happening at random is, basically, the probability of guessing a private
+                                       // key anyway, so its not really worth actually handling outside of tests.
                                        #[cfg(test)] {
                                                res_opt = res.add(J);
                                        }