mirror of https://github.com/gchq/CyberChef.git
79 lines
1.9 KiB
JavaScript
79 lines
1.9 KiB
JavaScript
/**
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* Binary functions.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2018
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* @license Apache-2.0
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*/
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import Utils from "../Utils.mjs";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* Convert a byte array into a binary string.
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*
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* @param {Uint8Array|byteArray|number} data
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* @param {string} [delim="Space"]
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* @param {number} [padding=8]
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* @returns {string}
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*
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* @example
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* // returns "00010000 00100000 00110000"
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* toBinary([10,20,30]);
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*
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* // returns "00010000 00100000 00110000"
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* toBinary([10,20,30], ":");
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*/
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export function toBinary(data, delim="Space", padding=8) {
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delim = Utils.charRep(delim);
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let output = "";
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if (data.length) { // array
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for (let i = 0; i < data.length; i++) {
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output += data[i].toString(2).padStart(padding, "0") + delim;
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}
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} else if (typeof data === "number") { // Single value
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return data.toString(2).padStart(padding, "0");
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} else {
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return "";
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}
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if (delim.length) {
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return output.slice(0, -delim.length);
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} else {
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return output;
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}
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}
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/**
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* Convert a binary string into a byte array.
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*
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* @param {string} data
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* @param {string} [delim]
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* @param {number} [byteLen=8]
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* @returns {byteArray}
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*
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* @example
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* // returns [10,20,30]
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* fromBinary("00010000 00100000 00110000");
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*
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* // returns [10,20,30]
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* fromBinary("00010000:00100000:00110000", "Colon");
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*/
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export function fromBinary(data, delim="Space", byteLen=8) {
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if (byteLen < 1 || Math.round(byteLen) !== byteLen)
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throw new OperationError("Byte length must be a positive integer");
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const delimRegex = Utils.regexRep(delim);
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data = data.replace(delimRegex, "");
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const output = [];
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for (let i = 0; i < data.length; i += byteLen) {
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output.push(parseInt(data.substr(i, byteLen), 2));
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}
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return output;
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}
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