test size limit of RSA message body

rsa.js

const bits = 2048
const { publicKey } = crypto.generateKeyPairSync('rsa', {
  modulusLength: bits,
  publicKeyEncoding: {
    type: 'pkcs1',
    format: 'pem'
  }
})

const test = (len) => {
  console.log(len)
  try {
    const buf = crypto.randomBytes(len)
    crypto.publicEncrypt(publicKey, buf)
  } catch (err) {
    console.error(err)
    test(--len)
  }
}

test(bits / 8)