From 3eb5dcaae743257d8c0c547fecc840eb1cf40737 Mon Sep 17 00:00:00 2001
From: Isis Lovecruft <isis@torproject.org>
Date: Tue, 21 Feb 2017 03:13:30 +0000
Subject: [PATCH] Implement CTEq for ExtendedPoint.

---
 src/curve.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/curve.rs b/src/curve.rs
index fef11b7..4f7126b 100644
--- a/src/curve.rs
+++ b/src/curve.rs
@@ -986,6 +986,20 @@ mod test {
         assert_eq!(  bp_added.compress(), BASE2_CMPRSSD);
     }
 
+    #[test]
+    fn test_extended_point_equality() {
+        let two = [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ];
+        let id1 = ExtendedPoint::identity();
+        let id2 = ExtendedPoint{
+            X: FieldElement::zero(),
+            Y: FieldElement::from_bytes(&two),
+            Z: FieldElement::from_bytes(&two),
+            T: FieldElement::zero()};
+
+        assert!(id1.ct_eq(&id2) == 1u8);
+    }
+
     /// Sanity check for conversion to precomputed points
     #[test]
     fn test_convert_to_precomputed() {