test-dh-regr.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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'use strict';
const common = require('../common');

if (!common.hasCrypto) {
  common.skip('missing crypto');
}

if (common.isPi) {
  common.skip('Too slow for Raspberry Pi devices');
}

const assert = require('assert');
const crypto = require('crypto');

// FIPS requires length >= 1024 but we use 512/256 in this test to keep it from
// taking too long and timing out in CI.
const length = (common.hasFipsCrypto) ? 1024 : common.hasOpenSSL3 ? 512 : 256;

const p = crypto.createDiffieHellman(length).getPrime();

for (let i = 0; i < 2000; i++) {
  const a = crypto.createDiffieHellman(p);
  const b = crypto.createDiffieHellman(p);

  a.generateKeys();
  b.generateKeys();

  const aSecret = a.computeSecret(b.getPublicKey());
  const bSecret = b.computeSecret(a.getPublicKey());

  assert.deepStrictEqual(
    aSecret,
    bSecret,
    'Secrets should be equal.\n' +
    `aSecret: ${aSecret.toString('base64')}\n` +
    `bSecret: ${bSecret.toString('base64')}`,
  );
}