CyberChef/src/core/operations/BitShiftLeft.mjs

78 lines
1.7 KiB
JavaScript
Raw Normal View History

/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*/
import Operation from "../Operation.mjs";
/**
* Bit shift left operation
*/
class BitShiftLeft extends Operation {
/**
* BitShiftLeft constructor
*/
constructor() {
super();
this.name = "Bit shift left";
this.module = "Default";
this.description = "Shifts the bits in each byte towards the left by the specified amount.";
this.infoURL = "https://wikipedia.org/wiki/Bitwise_operation#Bit_shifts";
this.inputType = "ArrayBuffer";
this.outputType = "ArrayBuffer";
this.args = [
{
"name": "Amount",
"type": "number",
"value": 1
}
];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {ArrayBuffer}
*/
run(input, args) {
const amount = args[0];
input = new Uint8Array(input);
return input.map(b => {
return (b << amount) & 0xff;
}).buffer;
}
/**
* Highlight Bit shift left
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlight(pos, args) {
return pos;
}
/**
* Highlight Bit shift left 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 BitShiftLeft;