mirror of https://github.com/gchq/CyberChef.git
97 lines
2.6 KiB
JavaScript
97 lines
2.6 KiB
JavaScript
/**
|
||
* @author n1474335 [n1474335@gmail.com]
|
||
* @copyright Crown Copyright 2016
|
||
* @license Apache-2.0
|
||
*/
|
||
|
||
import Operation from "../Operation.mjs";
|
||
|
||
/**
|
||
* Escape Unicode Characters operation
|
||
*/
|
||
class EscapeUnicodeCharacters extends Operation {
|
||
|
||
/**
|
||
* EscapeUnicodeCharacters constructor
|
||
*/
|
||
constructor() {
|
||
super();
|
||
|
||
this.name = "Escape Unicode Characters";
|
||
this.module = "Default";
|
||
this.description = "Converts characters to their unicode-escaped notations.<br><br>Supports the prefixes:<ul><li><code>\\u</code></li><li><code>%u</code></li><li><code>U+</code></li></ul>e.g. <code>σου</code> becomes <code>\\u03C3\\u03BF\\u03C5</code>";
|
||
this.inputType = "string";
|
||
this.outputType = "string";
|
||
this.args = [
|
||
{
|
||
"name": "Prefix",
|
||
"type": "option",
|
||
"value": ["\\u", "%u", "U+"]
|
||
},
|
||
{
|
||
"name": "Encode all chars",
|
||
"type": "boolean",
|
||
"value": false
|
||
},
|
||
{
|
||
"name": "Padding",
|
||
"type": "number",
|
||
"value": 4
|
||
},
|
||
{
|
||
"name": "Uppercase hex",
|
||
"type": "boolean",
|
||
"value": true
|
||
}
|
||
];
|
||
this.checks = [
|
||
{
|
||
pattern: "\\\\u(?:[\\da-f]{4,6})",
|
||
flags: "i",
|
||
args: ["\\u"]
|
||
},
|
||
{
|
||
pattern: "%u(?:[\\da-f]{4,6})",
|
||
flags: "i",
|
||
args: ["%u"]
|
||
},
|
||
{
|
||
pattern: "U\\+(?:[\\da-f]{4,6})",
|
||
flags: "i",
|
||
args: ["U+"]
|
||
}
|
||
];
|
||
}
|
||
|
||
/**
|
||
* @param {string} input
|
||
* @param {Object[]} args
|
||
* @returns {string}
|
||
*/
|
||
run(input, args) {
|
||
const regexWhitelist = /[ -~]/i,
|
||
[prefix, encodeAll, padding, uppercaseHex] = args;
|
||
|
||
let output = "",
|
||
character = "";
|
||
|
||
for (let i = 0; i < input.length; i++) {
|
||
character = input[i];
|
||
if (!encodeAll && regexWhitelist.test(character)) {
|
||
// It’s a printable ASCII character so don’t escape it.
|
||
output += character;
|
||
continue;
|
||
}
|
||
|
||
let cp = character.codePointAt(0).toString(16);
|
||
if (uppercaseHex) cp = cp.toUpperCase();
|
||
output += prefix + cp.padStart(padding, "0");
|
||
}
|
||
|
||
return output;
|
||
}
|
||
|
||
}
|
||
|
||
export default EscapeUnicodeCharacters;
|