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ec: compare strictly against null

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This commit is contained in:
Daniel Cousens 2014-06-04 16:06:11 +10:00
parent 525b053e39
commit dc3d9aec65
1 changed files with 4 additions and 9 deletions
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13
src/ec.js
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@ -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
}