utils-legacy.js•1.22 kB
'use strict'
// This file contains crypto utility functions for versions of Node.js < 15.0.0,
// which does not support the WebCrypto.subtle API.
const nodeCrypto = require('crypto')
function md5(string) {
return nodeCrypto.createHash('md5').update(string, 'utf-8').digest('hex')
}
// See AuthenticationMD5Password at https://www.postgresql.org/docs/current/static/protocol-flow.html
function postgresMd5PasswordHash(user, password, salt) {
const inner = md5(password + user)
const outer = md5(Buffer.concat([Buffer.from(inner), salt]))
return 'md5' + outer
}
function sha256(text) {
return nodeCrypto.createHash('sha256').update(text).digest()
}
function hashByName(hashName, text) {
hashName = hashName.replace(/(\D)-/, '$1') // e.g. SHA-256 -> SHA256
return nodeCrypto.createHash(hashName).update(text).digest()
}
function hmacSha256(key, msg) {
return nodeCrypto.createHmac('sha256', key).update(msg).digest()
}
async function deriveKey(password, salt, iterations) {
return nodeCrypto.pbkdf2Sync(password, salt, iterations, 32, 'sha256')
}
module.exports = {
postgresMd5PasswordHash,
randomBytes: nodeCrypto.randomBytes,
deriveKey,
sha256,
hashByName,
hmacSha256,
md5,
}