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89 lines
1.9 KiB
JavaScript
89 lines
1.9 KiB
JavaScript
/**
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* @author Matt C [matt@artemisbot.uk]
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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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/**
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* ROT47 operation.
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*/
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class ROT47 extends Operation {
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/**
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* ROT47 constructor
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*/
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constructor() {
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super();
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this.name = "ROT47";
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this.module = "Default";
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this.description = "A slightly more complex variation of a caesar cipher, which includes ASCII characters from 33 '!' to 126 '~'. Default rotation: 47.";
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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: "Amount",
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type: "number",
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value: 47
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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 output = input;
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let amount = args[0],
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chr;
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if (amount) {
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if (amount < 0) {
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amount = 94 - (Math.abs(amount) % 94);
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}
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for (let i = 0; i < input.length; i++) {
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chr = input[i];
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if (chr >= 33 && chr <= 126) {
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chr = (chr - 33 + amount) % 94;
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output[i] = chr + 33;
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}
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}
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}
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return output;
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}
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/**
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* Highlight ROT47
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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 ROT47 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 ROT47;
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