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ec: white space fixes

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It is advised to use ?w=0 in comparing this commit.
This commit is contained in:
Daniel Cousens 2014-06-04 16:04:33 +10:00
parent 8a2dcaaaf5
commit 79c7b68d35
1 changed files with 128 additions and 124 deletions
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6
src/ec.js
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@ -94,6 +94,7 @@ function pointFpEquals(other) {
if (other == this) return true;
if (this.isInfinity()) return other.isInfinity();
if (other.isInfinity()) return this.isInfinity();
var u, v;
// u = Y2 * Z1 - Y1 * Z2
u = other.y.toBigInteger().multiply(this.z).subtract(this.y.toBigInteger().multiply(other.z)).mod(this.curve.q);
@ -130,6 +131,7 @@ function pointFpAdd(b) {
if (u.signum() === 0) {
return this.twice(); // this == b, so double
}
return this.curve.getInfinity(); // this = -b, so infinity
}
@ -161,9 +163,11 @@ function pointFpTwice() {
// w = 3 * x1^2 + a * z1^2
var w = x1.square().multiply(THREE);
if (a.signum() !== 0) {
w = w.add(this.z.square().multiply(a));
}
w = w.mod(this.curve.q);
// x3 = 2 * y1 * z1 * (w^2 - 8 * x1 * y1^2 * z1)
var x3 = w.square().subtract(x1.shiftLeft(3).multiply(y1sqz1)).shiftLeft(1).multiply(y1z1).mod(this.curve.q);
@ -205,6 +209,7 @@ function pointFpMultiply(k) {
// Compute this*j + x*k (simultaneous multiplication)
function pointFpMultiplyTwo(j,x,k) {
var i;
if (j.bitLength() > k.bitLength())
i = j.bitLength() - 1;
else
@ -410,6 +415,5 @@ ECPointFp.prototype.validate = function () {
return true;
};
module.exports = ECCurveFp;
module.exports.ECPointFp = ECPointFp;