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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 | 5x 3x 1x | /** * @file Multi-Factor Derived Key Persistence Functions * @copyright Multifactor 2022 All Rights Reserved * * @description * Operations for persisting factors of a multi-factor derived key * * @author Vivek Nair (https://nair.me) <[email protected]> */ /** * Persist material from an MFKDF factor to bypass it in future derivation * * @example * // setup 3-factor multi-factor derived key * const setup = await mfkdf.setup.key([ * await mfkdf.setup.factors.password('password1', { id: 'password1' }), * await mfkdf.setup.factors.password('password2', { id: 'password2' }), * await mfkdf.setup.factors.password('password3', { id: 'password3' }) * ], {size: 8}) * * // persist one of the factors * const factor2 = setup.persistFactor('password2') * * // derive key with 2 factors * const derived = await mfkdf.derive.key(setup.policy, { * password1: mfkdf.derive.factors.password('password1'), * password2: mfkdf.derive.factors.persisted(factor2), * password3: mfkdf.derive.factors.password('password3') * }) * * setup.key.toString('hex') // -> 64587f2a0e65dc3c * derived.key.toString('hex') // -> 64587f2a0e65dc3c * * @param {string} id - ID of the factor to persist * @returns {Buffer} - The share which can be used to bypass the factor * @author Vivek Nair (https://nair.me) <[email protected]> * @since 0.18.0 * @memberOf MFKDFDerivedKey */ function persistFactor (id) { const index = this.policy.factors.findIndex(x => x.id === id) return this.shares[index] } module.exports.persistFactor = persistFactor |