88 lines
2.3 KiB
JavaScript
88 lines
2.3 KiB
JavaScript
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/**
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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";
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import Utils from "../Utils";
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import { bitOp, xor } from "../lib/BitwiseOp";
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/**
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* XOR operation
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*/
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class XOR extends Operation {
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/**
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* XOR constructor
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*/
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constructor() {
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super();
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this.name = "XOR";
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this.module = "Default";
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this.description = "XOR the input with the given key.<br>e.g. <code>fe023da5</code><br><br><strong>Options</strong><br><u>Null preserving:</u> If the current byte is 0x00 or the same as the key, skip it.<br><br><u>Scheme:</u><ul><li>Standard - key is unchanged after each round</li><li>Input differential - key is set to the value of the previous unprocessed byte</li><li>Output differential - key is set to the value of the previous processed byte</li></ul>";
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this.inputType = "byteArray";
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this.outputType = "byteArray";
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this.args = [
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{
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"name": "Key",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["Hex", "Base64", "UTF8", "Latin1"]
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},
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{
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"name": "Scheme",
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"type": "option",
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"value": ["Standard", "Input differential", "Output differential"]
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},
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{
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"name": "Null preserving",
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"type": "boolean",
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"value": false
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}
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];
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}
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/**
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* @param {byteArray} input
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* @param {Object[]} args
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* @returns {byteArray}
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*/
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run(input, args) {
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const key = Utils.convertToByteArray(args[0].string || "", args[0].option),
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[, scheme, nullPreserving] = args;
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return bitOp(input, key, xor, nullPreserving, scheme);
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}
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/**
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* Highlight XOR
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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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return pos;
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}
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/**
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* Highlight XOR in reverse
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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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return pos;
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}
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}
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export default XOR;
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