mirror of https://github.com/gchq/CyberChef.git
89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
/**
|
|
* @author n1474335 [n1474335@gmail.com]
|
|
* @copyright Crown Copyright 2016
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation";
|
|
import Utils from "../Utils";
|
|
import { bitOp, xor, BITWISE_OP_DELIMS } from "../lib/BitwiseOp";
|
|
|
|
/**
|
|
* XOR operation
|
|
*/
|
|
class XOR extends Operation {
|
|
|
|
/**
|
|
* XOR constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "XOR";
|
|
this.module = "Default";
|
|
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><li>Cascade - key is set to the input byte shifted by one</li></ul>";
|
|
this.infoURL = "https://wikipedia.org/wiki/XOR";
|
|
this.inputType = "byteArray";
|
|
this.outputType = "byteArray";
|
|
this.args = [
|
|
{
|
|
"name": "Key",
|
|
"type": "toggleString",
|
|
"value": "",
|
|
"toggleValues": BITWISE_OP_DELIMS
|
|
},
|
|
{
|
|
"name": "Scheme",
|
|
"type": "option",
|
|
"value": ["Standard", "Input differential", "Output differential", "Cascade"]
|
|
},
|
|
{
|
|
"name": "Null preserving",
|
|
"type": "boolean",
|
|
"value": false
|
|
}
|
|
];
|
|
}
|
|
|
|
/**
|
|
* @param {byteArray} input
|
|
* @param {Object[]} args
|
|
* @returns {byteArray}
|
|
*/
|
|
run(input, args) {
|
|
const key = Utils.convertToByteArray(args[0].string || "", args[0].option),
|
|
[, scheme, nullPreserving] = args;
|
|
|
|
return bitOp(input, key, xor, nullPreserving, scheme);
|
|
}
|
|
|
|
/**
|
|
* Highlight XOR
|
|
*
|
|
* @param {Object[]} pos
|
|
* @param {number} pos[].start
|
|
* @param {number} pos[].end
|
|
* @param {Object[]} args
|
|
* @returns {Object[]} pos
|
|
*/
|
|
highlight(pos, args) {
|
|
return pos;
|
|
}
|
|
|
|
/**
|
|
* Highlight XOR in reverse
|
|
*
|
|
* @param {Object[]} pos
|
|
* @param {number} pos[].start
|
|
* @param {number} pos[].end
|
|
* @param {Object[]} args
|
|
* @returns {Object[]} pos
|
|
*/
|
|
highlightReverse(pos, args) {
|
|
return pos;
|
|
}
|
|
|
|
}
|
|
|
|
export default XOR;
|