js-libp2p-crypto/src/pbkdf2.js
Hugo Dias 8d8294dc3f fix: clean up, bundle size reduction
BREAKING CHANGE: getRandomValues method exported from src/keys/rsa-browser.js and src/keys/rsa.js signature has changed from accepting an array to a number for random byte length
2019-01-08 21:29:42 +01:00

44 lines
984 B
JavaScript

'use strict'
const forgePbkdf2 = require('node-forge/lib/pbkdf2')
const forgeUtil = require('node-forge/lib/util')
/**
* Maps an IPFS hash name to its node-forge equivalent.
*
* See https://github.com/multiformats/multihash/blob/master/hashtable.csv
*
* @private
*/
const hashName = {
sha1: 'sha1',
'sha2-256': 'sha256',
'sha2-512': 'sha512'
}
/**
* Computes the Password-Based Key Derivation Function 2.
*
* @param {string} password
* @param {string} salt
* @param {number} iterations
* @param {number} keySize (in bytes)
* @param {string} hash - The hash name ('sha1', 'sha2-512, ...)
* @returns {string} - A new password
*/
function pbkdf2 (password, salt, iterations, keySize, hash) {
const hasher = hashName[hash]
if (!hasher) {
throw new Error(`Hash '${hash}' is unknown or not supported`)
}
const dek = forgePbkdf2(
password,
salt,
iterations,
keySize,
hasher)
return forgeUtil.encode64(dek)
}
module.exports = pbkdf2