mirror of https://github.com/gchq/CyberChef.git
133 lines
3.7 KiB
JavaScript
133 lines
3.7 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import {toHex, TO_HEX_DELIM_OPTIONS} from "../lib/Hex.mjs";
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import Utils from "../Utils.mjs";
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/**
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* To Hex operation
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*/
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class ToHex extends Operation {
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/**
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* ToHex constructor
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*/
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constructor() {
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super();
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this.name = "To Hex";
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this.module = "Default";
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this.description = "Converts the input string to hexadecimal bytes separated by the specified delimiter.<br><br>e.g. The UTF-8 encoded string <code>Γειά σου</code> becomes <code>ce 93 ce b5 ce b9 ce ac 20 cf 83 ce bf cf 85 0a</code>";
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this.infoURL = "https://wikipedia.org/wiki/Hexadecimal";
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this.inputType = "ArrayBuffer";
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this.outputType = "string";
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this.args = [
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{
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name: "Delimiter",
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type: "option",
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value: TO_HEX_DELIM_OPTIONS
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},
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{
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name: "Bytes per line",
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type: "number",
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value: 0
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}
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];
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}
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/**
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* @param {ArrayBuffer} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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let delim, comma;
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if (args[0] === "0x with comma") {
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delim = "0x";
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comma = ",";
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} else {
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delim = Utils.charRep(args[0] || "Space");
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}
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const lineSize = args[1];
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return toHex(new Uint8Array(input), delim, 2, comma, lineSize);
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}
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/**
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* Highlight to Hex
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlight(pos, args) {
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let delim, commaLen = 0;
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if (args[0] === "0x with comma") {
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delim = "0x";
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commaLen = 1;
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} else {
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delim = Utils.charRep(args[0] || "Space");
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}
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const lineSize = args[1],
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len = (delim === "\r\n" ? 1 : delim.length) + commaLen;
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const countLF = function(p) {
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// Count the number of LFs from 0 upto p
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return (p / lineSize | 0) - (p >= lineSize && p % lineSize === 0);
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};
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pos[0].start = pos[0].start * (2 + len) + countLF(pos[0].start);
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pos[0].end = pos[0].end * (2 + len) + countLF(pos[0].end);
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// if the delimiters are not prepended, trim the trailing delimiter
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if (!(delim === "0x" || delim === "\\x")) {
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pos[0].end -= delim.length;
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}
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// if there is comma, trim the trailing comma
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pos[0].end -= commaLen;
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return pos;
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}
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/**
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* Highlight from Hex
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*
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* @param {Object[]} pos
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* @param {number} pos[].start
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* @param {number} pos[].end
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* @param {Object[]} args
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* @returns {Object[]} pos
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*/
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highlightReverse(pos, args) {
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let delim, commaLen;
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if (args[0] === "0x with comma") {
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delim = "0x";
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commaLen = 1;
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} else {
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delim = Utils.charRep(args[0] || "Space");
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}
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const lineSize = args[1],
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len = (delim === "\r\n" ? 1 : delim.length) + commaLen,
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width = len + 2;
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const countLF = function(p) {
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// Count the number of LFs from 0 up to p
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const lineLength = width * lineSize;
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return (p / lineLength | 0) - (p >= lineLength && p % lineLength === 0);
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};
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pos[0].start = pos[0].start === 0 ? 0 : Math.round((pos[0].start - countLF(pos[0].start)) / width);
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pos[0].end = pos[0].end === 0 ? 0 : Math.ceil((pos[0].end - countLF(pos[0].end)) / width);
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return pos;
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}
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}
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export default ToHex;
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