mirror of https://github.com/gchq/CyberChef.git
79 lines
2.8 KiB
JavaScript
79 lines
2.8 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";
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import Utils from "../Utils";
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import forge from "node-forge/dist/forge.min.js";
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/**
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* Derive PBKDF2 key operation
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*/
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class DerivePBKDF2Key extends Operation {
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/**
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* DerivePBKDF2Key constructor
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*/
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constructor() {
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super();
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this.name = "Derive PBKDF2 key";
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this.module = "Ciphers";
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this.description = "PBKDF2 is a password-based key derivation function. It is part of RSA Laboratories' Public-Key Cryptography Standards (PKCS) series, specifically PKCS #5 v2.0, also published as Internet Engineering Task Force's RFC 2898.<br><br>In many applications of cryptography, user security is ultimately dependent on a password, and because a password usually can't be used directly as a cryptographic key, some processing is required.<br><br>A salt provides a large set of keys for any given password, and an iteration count increases the cost of producing keys from a password, thereby also increasing the difficulty of attack.<br><br>If you leave the salt argument empty, a random salt will be generated.";
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this.infoURL = "https://wikipedia.org/wiki/PBKDF2";
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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": "Passphrase",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["UTF8", "Latin1", "Hex", "Base64"]
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},
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{
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"name": "Key size",
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"type": "number",
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"value": 128
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},
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{
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"name": "Iterations",
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"type": "number",
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"value": 1
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},
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{
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"name": "Hashing function",
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"type": "option",
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"value": ["SHA1", "SHA256", "SHA384", "SHA512", "MD5"]
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},
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{
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"name": "Salt",
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"type": "toggleString",
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"value": "",
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"toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
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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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const passphrase = Utils.convertToByteString(args[0].string, args[0].option),
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keySize = args[1],
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iterations = args[2],
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hasher = args[3],
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salt = Utils.convertToByteString(args[4].string, args[4].option) ||
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forge.random.getBytesSync(keySize),
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derivedKey = forge.pkcs5.pbkdf2(passphrase, salt, iterations, keySize / 8, hasher.toLowerCase());
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return forge.util.bytesToHex(derivedKey);
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}
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}
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export default DerivePBKDF2Key;
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