elliptic-curve: test EncodedPoint::conditional_select (#410)

RustCrypto · Dec 17, 2020 · 515b006 · 515b006
1 parent aac590b
commit 515b006
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/elliptic-curve/src/sec1.rs b/elliptic-curve/src/sec1.rs
@@ -499,6 +499,7 @@ mod tests {
     use crate::{weierstrass, Curve};
     use generic_array::{typenum::U32, GenericArray};
     use hex_literal::hex;
+    use subtle::ConditionallySelectable;
 
     #[derive(Clone, Debug, Default, Eq, PartialEq, PartialOrd, Ord)]
     struct ExampleCurve;
@@ -669,6 +670,18 @@ mod tests {
         assert_eq!(compressed_point.as_bytes(), &COMPRESSED_BYTES[..]);
     }
 
+    #[test]
+    fn conditional_select() {
+        let a = EncodedPoint::from_bytes(&COMPRESSED_BYTES[..]).unwrap();
+        let b = EncodedPoint::from_bytes(&UNCOMPRESSED_BYTES[..]).unwrap();
+
+        let a_selected = EncodedPoint::conditional_select(&a, &b, 0.into());
+        assert_eq!(a, a_selected);
+
+        let b_selected = EncodedPoint::conditional_select(&a, &b, 1.into());
+        assert_eq!(b, b_selected);
+    }
+
     #[test]
     fn identity() {
         let identity_point = EncodedPoint::identity();