CyberChef/src/core/operations/ConditionalJump.mjs

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/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import Operation from "../Operation";
import Dish from "../Dish";
import { getLabelIndex } from "../lib/FlowControl";
/**
* Conditional Jump operation
*/
class ConditionalJump extends Operation {
/**
* ConditionalJump constructor
*/
constructor() {
super();
this.name = "Conditional Jump";
this.flowControl = true;
this.module = "Default";
this.description = "Conditionally jump forwards or backwards to the specified Label based on whether the data matches the specified regular expression.";
this.inputType = "string";
this.outputType = "string";
this.args = [
{
"name": "Match (regex)",
"type": "string",
"value": ""
},
{
"name": "Invert match",
"type": "boolean",
"value": false
},
{
"name": "Label name",
"type": "shortString",
"value": ""
},
{
"name": "Maximum jumps (if jumping backwards)",
"type": "number",
"value": 10
}
];
}
/**
* @param {Object} state - The current state of the recipe.
* @param {number} state.progress - The current position in the recipe.
* @param {Dish} state.dish - The Dish being operated on.
* @param {Operation[]} state.opList - The list of operations in the recipe.
* @param {number} state.numJumps - The number of jumps taken so far.
* @returns {Object} The updated state of the recipe.
*/
async run(state) {
const ings = state.opList[state.progress].ingValues,
dish = state.dish,
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[regexStr, invert, label, maxJumps] = ings,
jmpIndex = getLabelIndex(label, state);
if (state.numJumps >= maxJumps || jmpIndex === -1) {
return state;
}
if (regexStr !== "") {
const str = await dish.get(Dish.STRING);
const strMatch = str.search(regexStr) > -1;
if (!invert && strMatch || invert && !strMatch) {
state.progress = jmpIndex;
state.numJumps++;
}
}
return state;
}
}
export default ConditionalJump;