import crypto from 'crypto'

export function hmac(input, key, out) {
  return out
    ? crypto.createHmac('sha1', key).update(input).digest(out)
    : crypto.createHmac('sha1', key).update(input).digest('hex')
}

export function genRandomString(length) {
  return crypto
    .randomBytes(Math.ceil(length / 2))
    .toString('hex')
    .slice(0, length)
}

export function sha512(password, salt) {
  let hash = crypto.createHmac('sha512', salt)
  hash.update(password)
  let value = hash.digest('hex')
  return {
    salt: salt,
    passwordHash: value,
  }
}

export function sha1(str) {
  const md5sum = crypto.createHash('sha1')
  md5sum.update(str)
  str = md5sum.digest('hex')
  return str
}

export function md5(str) {
  const md5sum = crypto.createHash('md5')
  md5sum.update(str)
  str = md5sum.digest('hex')
  return str
}