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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 53 54 55 56 | 1x 7x 6x 5x 5x 5x 5x 5x 5x 1x | /** * @file MFKDF Question Factor Derivation * @copyright Multifactor 2022 All Rights Reserved * * @description * Derive question factor for multi-factor key derivation * * @author Vivek Nair (https://nair.me) <[email protected]> */ const zxcvbn = require('zxcvbn') /** * Derive an MFKDF Security Question factor * * @example * // setup key with security question factor * const setup = await mfkdf.setup.key([ * await mfkdf.setup.factors.question('Fido') * ], {size: 8}) * * // derive key with security question factor * const derive = await mfkdf.derive.key(setup.policy, { * question: mfkdf.derive.factors.question('Fido') * }) * * setup.key.toString('hex') // -> 01d0c7236adf2516 * derive.key.toString('hex') // -> 01d0c7236adf2516 * * @param {string} answer - The answer from which to derive an MFKDF factor * @returns {function(config:Object): Promise<MFKDFFactor>} Async function to generate MFKDF factor information * @author Vivek Nair (https://nair.me) <[email protected]> * @since 1.0.0 * @memberof derive.factors */ function question (answer) { if (typeof answer !== 'string') throw new TypeError('answer must be a string') if (answer.length === 0) throw new RangeError('answer cannot be empty') answer = answer.toLowerCase().replace(/[^0-9a-z ]/gi, '').trim() const strength = zxcvbn(answer) return async (params) => { return { type: 'question', data: Buffer.from(answer), params: async () => { return params }, output: async () => { return { strength } } } } } module.exports.question = question |