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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | 1x 1x 16x 16x 16x 16x 16x 1x | /** * @file Multi-Factor Derived Key Crypto Functions * @copyright Multifactor, Inc. 2022–2025 * * @description * Multi-Factor Deterministic Password Generator (MFDPG2) * * @author Vivek Nair (https://nair.me) <[email protected]> */ const RandExp = require('randexp') const rand = require('random-seed') /** * Generate a policy-compliant password for a given purpose. * * @example * const setup = await mfkdf.setup.key([ * await mfkdf.setup.factors.password('password1', { * id: 'password1' * }) * ]) * const password = setup.derivePassword( * 'example.com', * 'salt', * /[a-zA-Z]{6,10}/ * ) * * const password2 = setup.derivePassword( * 'example.com', * 'salt', * /[a-zA-Z]{6,10}/ * ) * password.should.equal(password2) * * @param {string} purpose - Unique purpose value for this password * @param {string} salt - Unique salt value for this salt * @param {string} regex - Regular expression defining password policy * @returns {string} Derived password * @author Vivek Nair (https://nair.me) <[email protected]> * @since 2.0.0 * @memberOf MFKDFDerivedKey */ function derivePassword (purpose, salt, regex) { const passwordKey = this.getSubkey(purpose, salt) const dfa = new RandExp(regex) const rng = rand.create(passwordKey.toString('hex')) dfa.randInt = rng.intBetween return dfa.gen() } module.exports.derivePassword = derivePassword |