CyberChef/src/core/operations/ToBase62.mjs

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/**
* @author tcode2k16 [tcode2k16@gmail.com]
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
import BigNumber from "bignumber.js";
import Utils from "../Utils.mjs";
import {toHexFast} from "../lib/Hex.mjs";
/**
* To Base62 operation
*/
class ToBase62 extends Operation {
/**
* ToBase62 constructor
*/
constructor() {
super();
this.name = "To Base62";
this.module = "Default";
this.description = "Base62 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. The high number base results in shorter strings than with the decimal or hexadecimal system.";
this.infoURL = "https://wikipedia.org/wiki/List_of_numeral_systems";
this.inputType = "ArrayBuffer";
this.outputType = "string";
this.args = [
{
name: "Alphabet",
type: "string",
value: "0-9A-Za-z"
}
];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {string}
*/
run(input, args) {
input = new Uint8Array(input);
if (input.length < 1) return "";
const ALPHABET = Utils.expandAlphRange(args[0]).join("");
const BN = BigNumber.clone({ ALPHABET });
input = toHexFast(input).toUpperCase();
const number = new BN(input, 16);
return number.toString(62);
}
}
export default ToBase62;