shamirs-secret-sharing-ts/dist/share.js

A simple implementation of Shamir's Secret Sharing configured to use a finite field in GF(2^8) with 128 bit padding

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const constants_1 = require("./constants");
function parse(input) {
    const share = { id: null, bits: null, data: null };
    if (Buffer.isBuffer(input)) {
        input = input.toString('hex');
    }
    if ('0' === input[0]) {
        input = input.slice(1);
    }
    // bit count is in base36
    share.bits = parseInt(input.slice(0, 1), 36);
    const maxBits = constants_1.BIT_SIZE - 1;
    const idLength = maxBits.toString(16).length;
    const regex = `^([a-kA-K3-9]{1})([a-fA-F0-9]{${idLength}})([a-fA-F0-9]+)$`;
    const matches = new RegExp(regex).exec(input);
    if (matches && matches.length) {
        share.id = parseInt(matches[2], 16);
        share.data = matches[3];
    }
    return share;
}
exports.parse = parse;