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52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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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.mjs";
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import Utils from "../Utils.mjs";
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import {HASH_DELIM_OPTIONS} from "../lib/Delim.mjs";
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import ctphjs from "ctph.js";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* Compare CTPH hashes operation
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*/
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class CompareCTPHHashes extends Operation {
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/**
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* CompareCTPHHashes constructor
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*/
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constructor() {
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super();
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this.name = "Compare CTPH hashes";
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this.module = "Crypto";
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this.description = "Compares two Context Triggered Piecewise Hashing (CTPH) fuzzy hashes to determine the similarity between them on a scale of 0 to 100.";
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this.infoURL = "https://forensicswiki.xyz/wiki/index.php?title=Context_Triggered_Piecewise_Hashing";
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this.inputType = "string";
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this.outputType = "Number";
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this.args = [
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{
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"name": "Delimiter",
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"type": "option",
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"value": HASH_DELIM_OPTIONS
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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 {Number}
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*/
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run(input, args) {
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const samples = input.split(Utils.charRep(args[0]));
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if (samples.length !== 2) throw new OperationError("Incorrect number of samples.");
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return ctphjs.similarity(samples[0], samples[1]);
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}
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}
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export default CompareCTPHHashes;
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