mirror of https://github.com/gchq/CyberChef.git
154 lines
4.4 KiB
JavaScript
154 lines
4.4 KiB
JavaScript
/**
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* @author tlwr [toby@toby.codes]
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* @copyright Crown Copyright 2017
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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 {LETTER_DELIM_OPTIONS, WORD_DELIM_OPTIONS} from "../lib/Delim";
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/**
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* From Morse Code operation
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*/
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class FromMorseCode extends Operation {
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/**
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* FromMorseCode constructor
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*/
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constructor() {
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super();
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this.name = "From Morse Code";
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this.module = "Default";
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this.description = "Translates Morse Code into (upper case) alphanumeric characters.";
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this.infoURL = "https://wikipedia.org/wiki/Morse_code";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Letter delimiter",
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"type": "option",
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"value": LETTER_DELIM_OPTIONS
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},
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{
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"name": "Word delimiter",
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"type": "option",
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"value": WORD_DELIM_OPTIONS
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}
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];
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this.patterns = [
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{
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match: "(?:^[-. \\n]{5,}$|^[_. \\n]{5,}$|^(?:dash|dot| |\\n){5,}$)",
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flags: "i",
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args: ["Space", "Line feed"]
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},
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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if (!this.reversedTable) {
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this.reverseTable();
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}
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const letterDelim = Utils.charRep(args[0]);
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const wordDelim = Utils.charRep(args[1]);
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input = input.replace(/-|‐|−|_|–|—|dash/ig, "<dash>"); //hyphen-minus|hyphen|minus-sign|undersore|en-dash|em-dash
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input = input.replace(/\.|·|dot/ig, "<dot>");
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let words = input.split(wordDelim);
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const self = this;
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words = Array.prototype.map.call(words, function(word) {
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const signals = word.split(letterDelim);
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const letters = signals.map(function(signal) {
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return self.reversedTable[signal];
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});
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return letters.join("");
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});
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words = words.join(" ");
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return words;
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}
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/**
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* Reverses the Morse Code lookup table
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*/
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reverseTable() {
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this.reversedTable = {};
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for (const letter in MORSE_TABLE) {
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const signal = MORSE_TABLE[letter];
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this.reversedTable[signal] = letter;
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}
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}
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}
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const MORSE_TABLE = {
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"A": "<dot><dash>",
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"B": "<dash><dot><dot><dot>",
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"C": "<dash><dot><dash><dot>",
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"D": "<dash><dot><dot>",
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"E": "<dot>",
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"F": "<dot><dot><dash><dot>",
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"G": "<dash><dash><dot>",
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"H": "<dot><dot><dot><dot>",
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"I": "<dot><dot>",
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"J": "<dot><dash><dash><dash>",
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"K": "<dash><dot><dash>",
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"L": "<dot><dash><dot><dot>",
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"M": "<dash><dash>",
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"N": "<dash><dot>",
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"O": "<dash><dash><dash>",
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"P": "<dot><dash><dash><dot>",
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"Q": "<dash><dash><dot><dash>",
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"R": "<dot><dash><dot>",
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"S": "<dot><dot><dot>",
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"T": "<dash>",
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"U": "<dot><dot><dash>",
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"V": "<dot><dot><dot><dash>",
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"W": "<dot><dash><dash>",
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"X": "<dash><dot><dot><dash>",
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"Y": "<dash><dot><dash><dash>",
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"Z": "<dash><dash><dot><dot>",
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"1": "<dot><dash><dash><dash><dash>",
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"2": "<dot><dot><dash><dash><dash>",
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"3": "<dot><dot><dot><dash><dash>",
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"4": "<dot><dot><dot><dot><dash>",
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"5": "<dot><dot><dot><dot><dot>",
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"6": "<dash><dot><dot><dot><dot>",
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"7": "<dash><dash><dot><dot><dot>",
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"8": "<dash><dash><dash><dot><dot>",
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"9": "<dash><dash><dash><dash><dot>",
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"0": "<dash><dash><dash><dash><dash>",
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".": "<dot><dash><dot><dash><dot><dash>",
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",": "<dash><dash><dot><dot><dash><dash>",
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":": "<dash><dash><dash><dot><dot><dot>",
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";": "<dash><dot><dash><dot><dash><dot>",
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"!": "<dash><dot><dash><dot><dash><dash>",
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"?": "<dot><dot><dash><dash><dot><dot>",
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"'": "<dot><dash><dash><dash><dash><dot>",
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"\"": "<dot><dash><dot><dot><dash><dot>",
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"/": "<dash><dot><dot><dash><dot>",
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"-": "<dash><dot><dot><dot><dot><dash>",
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"+": "<dot><dash><dot><dash><dot>",
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"(": "<dash><dot><dash><dash><dot>",
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")": "<dash><dot><dash><dash><dot><dash>",
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"@": "<dot><dash><dash><dot><dash><dot>",
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"=": "<dash><dot><dot><dot><dash>",
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"&": "<dot><dash><dot><dot><dot>",
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"_": "<dot><dot><dash><dash><dot><dash>",
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"$": "<dot><dot><dot><dash><dot><dot><dash>"
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};
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export default FromMorseCode;
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