@hpke/common
Version:
A Hybrid Public Key Encryption (HPKE) internal-use common module for @hpke family modules.
63 lines (62 loc) • 1.86 kB
JavaScript
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Bignum = void 0;
/**
* The minimum inplementation of bignum to derive an EC key pair.
*/
class Bignum {
constructor(size) {
Object.defineProperty(this, "_num", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
this._num = new Uint8Array(size);
}
val() {
return this._num;
}
reset() {
this._num.fill(0);
}
set(src) {
if (src.length !== this._num.length) {
throw new Error("Bignum.set: invalid argument");
}
this._num.set(src);
}
isZero() {
for (let i = 0; i < this._num.length; i++) {
if (this._num[i] !== 0) {
return false;
}
}
return true;
}
lessThan(v) {
if (v.length !== this._num.length) {
throw new Error("Bignum.lessThan: invalid argument");
}
for (let i = 0; i < this._num.length; i++) {
if (this._num[i] < v[i]) {
return true;
}
if (this._num[i] > v[i]) {
return false;
}
}
return false;
}
}
exports.Bignum = Bignum;
});