From dc3d9aec655bc52f1f2b9583e43861de88cd8444 Mon Sep 17 00:00:00 2001
From: Daniel Cousens <github@dcousens.com>
Date: Wed, 4 Jun 2014 16:06:11 +1000
Subject: [PATCH] ec: compare strictly against null
---
src/ec.js | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/src/ec.js b/src/ec.js
index 894c53e..47cdb49 100644
--- a/src/ec.js
+++ b/src/ec.js
@@ -67,19 +67,14 @@ function ECPointFp(curve,x,y,z) {
// Projective coordinates: either zinv == null or z * zinv == 1
// z and zinv are just BigIntegers, not fieldElements
- if (z == null) {
- this.z = BigInteger.ONE
-
- } else {
- this.z = z
- }
+ this.z = (z == undefined) ? BigInteger.ONE : z
this.zinv = null
//TODO: compression flag
}
function pointFpGetX() {
- if (this.zinv == null) {
+ if (this.zinv === null) {
this.zinv = this.z.modInverse(this.curve.q)
}
@@ -87,7 +82,7 @@ function pointFpGetX() {
}
function pointFpGetY() {
- if (this.zinv == null) {
+ if (this.zinv === null) {
this.zinv = this.z.modInverse(this.curve.q)
}
@@ -109,7 +104,7 @@ function pointFpEquals(other) {
}
function pointFpIsInfinity() {
- if ((this.x == null) && (this.y == null)) return true
+ if ((this.x === null) && (this.y === null)) return true
return this.z.signum() === 0 && this.y.toBigInteger().signum() !== 0
}