CyberChef/src/core/operations/RotateLeft.mjs

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/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*/
import Operation from "../Operation";
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import {rot, rotl, rotlCarry} from "../lib/Rotate";
/**
* Rotate left operation.
*/
class RotateLeft extends Operation {
/**
* RotateLeft constructor
*/
constructor() {
super();
this.name = "Rotate left";
this.module = "Default";
this.description = "Rotates each byte to the left by the number of bits specified, optionally carrying the excess bits over to the next byte. Currently only supports 8-bit values.";
this.infoURL = "https://wikipedia.org/wiki/Bitwise_operation#Bit_shifts";
this.inputType = "byteArray";
this.outputType = "byteArray";
this.args = [
{
name: "Amount",
type: "number",
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value: 1
},
{
name: "Carry through",
type: "boolean",
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value: false
}
];
}
/**
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* @param {byteArray} input
* @param {Object[]} args
* @returns {byteArray}
*/
run(input, args) {
if (args[1]) {
return rotlCarry(input, args[0]);
} else {
return rot(input, args[0], rotl);
}
}
/**
* Highlight rotate left
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlight(pos, args) {
return pos;
}
/**
* Highlight rotate 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 RotateLeft;