mirror of https://github.com/gchq/CyberChef.git
102 lines
2.9 KiB
JavaScript
102 lines
2.9 KiB
JavaScript
/**
|
|
* @author Karsten Silkenbäumer [github.com/kassi]
|
|
* @copyright Karsten Silkenbäumer 2019
|
|
* @license Apache-2.0
|
|
*/
|
|
|
|
import Operation from "../Operation.mjs";
|
|
import {
|
|
BACON_ALPHABETS,
|
|
BACON_TRANSLATIONS_FOR_ENCODING, BACON_TRANSLATION_AB,
|
|
swapZeroAndOne
|
|
} from "../lib/Bacon.mjs";
|
|
|
|
/**
|
|
* Bacon Cipher Encode operation
|
|
*/
|
|
class BaconCipherEncode extends Operation {
|
|
/**
|
|
* BaconCipherEncode constructor
|
|
*/
|
|
constructor() {
|
|
super();
|
|
|
|
this.name = "Bacon Cipher Encode";
|
|
this.module = "Default";
|
|
this.description = "Bacon's cipher or the Baconian cipher is a method of steganography devised by Francis Bacon in 1605. A message is concealed in the presentation of text, rather than its content.";
|
|
this.infoURL = "https://wikipedia.org/wiki/Bacon%27s_cipher";
|
|
this.inputType = "string";
|
|
this.outputType = "string";
|
|
this.args = [
|
|
{
|
|
"name": "Alphabet",
|
|
"type": "option",
|
|
"value": Object.keys(BACON_ALPHABETS)
|
|
},
|
|
{
|
|
"name": "Translation",
|
|
"type": "option",
|
|
"value": BACON_TRANSLATIONS_FOR_ENCODING
|
|
},
|
|
{
|
|
"name": "Keep extra characters",
|
|
"type": "boolean",
|
|
"value": false
|
|
},
|
|
{
|
|
"name": "Invert Translation",
|
|
"type": "boolean",
|
|
"value": false
|
|
}
|
|
];
|
|
}
|
|
|
|
/**
|
|
* @param {string} input
|
|
* @param {Object[]} args
|
|
* @returns {string}
|
|
*/
|
|
run(input, args) {
|
|
const [alphabet, translation, keep, invert] = args;
|
|
|
|
const alphabetObject = BACON_ALPHABETS[alphabet];
|
|
const charCodeA = "A".charCodeAt(0);
|
|
const charCodeZ = "Z".charCodeAt(0);
|
|
|
|
let output = input.replace(/./g, function (c) {
|
|
const charCode = c.toUpperCase().charCodeAt(0);
|
|
if (charCode >= charCodeA && charCode <= charCodeZ) {
|
|
let code = charCode - charCodeA;
|
|
if (alphabetObject.codes !== undefined) {
|
|
code = alphabetObject.codes[code];
|
|
}
|
|
const bacon = ("00000" + code.toString(2)).substr(-5, 5);
|
|
return bacon;
|
|
} else {
|
|
return c;
|
|
}
|
|
});
|
|
|
|
if (invert) {
|
|
output = swapZeroAndOne(output);
|
|
}
|
|
if (!keep) {
|
|
output = output.replace(/[^01]/g, "");
|
|
const outputArray = output.match(/(.{5})/g) || [];
|
|
output = outputArray.join(" ");
|
|
}
|
|
if (translation === BACON_TRANSLATION_AB) {
|
|
output = output.replace(/[01]/g, function (c) {
|
|
return {
|
|
"0": "A",
|
|
"1": "B"
|
|
}[c];
|
|
});
|
|
}
|
|
|
|
return output;
|
|
}
|
|
}
|
|
|
|
export default BaconCipherEncode;
|