test: split test-crypto-dh.js

test/common/crypto.js

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+'use strict';
+
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+// The values below (modp2/modp2buf) are for a 1024 bits long prime from
+// RFC 2412 E.2, see https://tools.ietf.org/html/rfc2412. */
+const modp2buf = Buffer.from([
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f,
+  0xda, 0xa2, 0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b,
+  0x80, 0xdc, 0x1c, 0xd1, 0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67,
+  0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6, 0x3b, 0x13, 0x9b, 0x22,
+  0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd, 0xef, 0x95,
+  0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
+  0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51,
+  0xc2, 0x45, 0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6,
+  0xf4, 0x4c, 0x42, 0xe9, 0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff,
+  0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed, 0xee, 0x38, 0x6b, 0xfb,
+  0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11, 0x7c, 0x4b,
+  0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe6, 0x53, 0x81,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+]);
+
+function testDH({ publicKey: alicePublicKey, privateKey: alicePrivateKey },
+                { publicKey: bobPublicKey, privateKey: bobPrivateKey },
+                expectedValue) {
+  const buf1 = crypto.diffieHellman({
+    privateKey: alicePrivateKey,
+    publicKey: bobPublicKey
+  });
+  const buf2 = crypto.diffieHellman({
+    privateKey: bobPrivateKey,
+    publicKey: alicePublicKey
+  });
+  assert.deepStrictEqual(buf1, buf2);
+
+  if (expectedValue !== undefined)
+    assert.deepStrictEqual(buf1, expectedValue);
+}
+
+module.exports = {
+  modp2buf,
+  testDH
+};

test/parallel/test-crypto-dh-constructor.js

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+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+const size = common.hasFipsCrypto || common.hasOpenSSL3 ? 1024 : 256;
+const dh1 = crypto.createDiffieHellman(size);
+const p1 = dh1.getPrime('buffer');
+
+{
+  const DiffieHellman = crypto.DiffieHellman;
+
+  const dh = DiffieHellman(p1, 'buffer');
+  assert(dh instanceof DiffieHellman, 'DiffieHellman is expected to return a ' +
+                                      'new instance when called without `new`');
+}
+
+{
+  const DiffieHellmanGroup = crypto.DiffieHellmanGroup;
+  const dhg = DiffieHellmanGroup('modp5');
+  assert(dhg instanceof DiffieHellmanGroup, 'DiffieHellmanGroup is expected ' +
+                                            'to return a new instance when ' +
+                                            'called without `new`');
+}
+
+{
+  const ECDH = crypto.ECDH;
+  const ecdh = ECDH('prime256v1');
+  assert(ecdh instanceof ECDH, 'ECDH is expected to return a new instance ' +
+                              'when called without `new`');
+}

test/parallel/test-crypto-dh-curves.js

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+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+// Second OAKLEY group, see
+// https://github.com/nodejs/node-v0.x-archive/issues/2338 and
+// https://xml2rfc.tools.ietf.org/public/rfc/html/rfc2412.html#anchor49
+const p = 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' +
+          '020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' +
+          '4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' +
+          'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF';
+crypto.createDiffieHellman(p, 'hex');
+
+// Confirm DH_check() results are exposed for optional examination.
+const bad_dh = crypto.createDiffieHellman('02', 'hex');
+assert.notStrictEqual(bad_dh.verifyError, 0);
+
+const availableCurves = new Set(crypto.getCurves());
+const availableHashes = new Set(crypto.getHashes());
+
+// Oakley curves do not clean up ERR stack, it was causing unexpected failure
+// when accessing other OpenSSL APIs afterwards.
+if (availableCurves.has('Oakley-EC2N-3')) {
+  crypto.createECDH('Oakley-EC2N-3');
+  crypto.createHash('sha256');
+}
+
+// Test ECDH
+if (availableCurves.has('prime256v1') && availableCurves.has('secp256k1')) {
+  const ecdh1 = crypto.createECDH('prime256v1');
+  const ecdh2 = crypto.createECDH('prime256v1');
+  const key1 = ecdh1.generateKeys();
+  const key2 = ecdh2.generateKeys('hex');
+  const secret1 = ecdh1.computeSecret(key2, 'hex', 'base64');
+  const secret2 = ecdh2.computeSecret(key1, 'latin1', 'buffer');
+
+  assert.strictEqual(secret1, secret2.toString('base64'));
+
+  // Point formats
+  assert.strictEqual(ecdh1.getPublicKey('buffer', 'uncompressed')[0], 4);
+  let firstByte = ecdh1.getPublicKey('buffer', 'compressed')[0];
+  assert(firstByte === 2 || firstByte === 3);
+  firstByte = ecdh1.getPublicKey('buffer', 'hybrid')[0];
+  assert(firstByte === 6 || firstByte === 7);
+  // Format value should be string
+
+  assert.throws(
+    () => ecdh1.getPublicKey('buffer', 10),
+    {
+      code: 'ERR_CRYPTO_ECDH_INVALID_FORMAT',
+      name: 'TypeError',
+      message: 'Invalid ECDH format: 10'
+    });
+
+  // ECDH should check that point is on curve
+  const ecdh3 = crypto.createECDH('secp256k1');
+  const key3 = ecdh3.generateKeys();
+
+  assert.throws(
+    () => ecdh2.computeSecret(key3, 'latin1', 'buffer'),
+    {
+      code: 'ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY',
+      name: 'Error',
+      message: 'Public key is not valid for specified curve'
+    });
+
+  // ECDH should allow .setPrivateKey()/.setPublicKey()
+  const ecdh4 = crypto.createECDH('prime256v1');
+
+  ecdh4.setPrivateKey(ecdh1.getPrivateKey());
+  ecdh4.setPublicKey(ecdh1.getPublicKey());
+
+  assert.throws(() => {
+    ecdh4.setPublicKey(ecdh3.getPublicKey());
+  }, { message: 'Failed to convert Buffer to EC_POINT' });
+
+  // Verify that we can use ECDH without having to use newly generated keys.
+  const ecdh5 = crypto.createECDH('secp256k1');
+
+  // Verify errors are thrown when retrieving keys from an uninitialized object.
+  assert.throws(() => {
+    ecdh5.getPublicKey();
+  }, /^Error: Failed to get ECDH public key$/);
+
+  assert.throws(() => {
+    ecdh5.getPrivateKey();
+  }, /^Error: Failed to get ECDH private key$/);
+
+  // A valid private key for the secp256k1 curve.
+  const cafebabeKey = 'cafebabe'.repeat(8);
+  // Associated compressed and uncompressed public keys (points).
+  const cafebabePubPtComp =
+  '03672a31bfc59d3f04548ec9b7daeeba2f61814e8ccc40448045007f5479f693a3';
+  const cafebabePubPtUnComp =
+  '04672a31bfc59d3f04548ec9b7daeeba2f61814e8ccc40448045007f5479f693a3' +
+  '2e02c7f93d13dc2732b760ca377a5897b9dd41a1c1b29dc0442fdce6d0a04d1d';
+  ecdh5.setPrivateKey(cafebabeKey, 'hex');
+  assert.strictEqual(ecdh5.getPrivateKey('hex'), cafebabeKey);
+  // Show that the public point (key) is generated while setting the
+  // private key.
+  assert.strictEqual(ecdh5.getPublicKey('hex'), cafebabePubPtUnComp);
+
+  // Compressed and uncompressed public points/keys for other party's
+  // private key.
+  // 0xDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF
+  const peerPubPtComp =
+  '02c6b754b20826eb925e052ee2c25285b162b51fdca732bcf67e39d647fb6830ae';
+  const peerPubPtUnComp =
+  '04c6b754b20826eb925e052ee2c25285b162b51fdca732bcf67e39d647fb6830ae' +
+  'b651944a574a362082a77e3f2b5d9223eb54d7f2f76846522bf75f3bedb8178e';
+
+  const sharedSecret =
+  '1da220b5329bbe8bfd19ceef5a5898593f411a6f12ea40f2a8eead9a5cf59970';
+
+  assert.strictEqual(ecdh5.computeSecret(peerPubPtComp, 'hex', 'hex'),
+                     sharedSecret);
+  assert.strictEqual(ecdh5.computeSecret(peerPubPtUnComp, 'hex', 'hex'),
+                     sharedSecret);
+
+  // Verify that we still have the same key pair as before the computation.
+  assert.strictEqual(ecdh5.getPrivateKey('hex'), cafebabeKey);
+  assert.strictEqual(ecdh5.getPublicKey('hex'), cafebabePubPtUnComp);
+
+  // Verify setting and getting compressed and non-compressed serializations.
+  ecdh5.setPublicKey(cafebabePubPtComp, 'hex');
+  assert.strictEqual(ecdh5.getPublicKey('hex'), cafebabePubPtUnComp);
+  assert.strictEqual(
+    ecdh5.getPublicKey('hex', 'compressed'),
+    cafebabePubPtComp
+  );
+  ecdh5.setPublicKey(cafebabePubPtUnComp, 'hex');
+  assert.strictEqual(ecdh5.getPublicKey('hex'), cafebabePubPtUnComp);
+  assert.strictEqual(
+    ecdh5.getPublicKey('hex', 'compressed'),
+    cafebabePubPtComp
+  );
+
+  // Show why allowing the public key to be set on this type
+  // does not make sense.
+  ecdh5.setPublicKey(peerPubPtComp, 'hex');
+  assert.strictEqual(ecdh5.getPublicKey('hex'), peerPubPtUnComp);
+  assert.throws(() => {
+    // Error because the public key does not match the private key anymore.
+    ecdh5.computeSecret(peerPubPtComp, 'hex', 'hex');
+  }, /Invalid key pair/);
+
+  // Set to a valid key to show that later attempts to set an invalid key are
+  // rejected.
+  ecdh5.setPrivateKey(cafebabeKey, 'hex');
+
+  // Some invalid private keys for the secp256k1 curve.
+  const errMessage = /Private key is not valid for specified curve/;
+  ['0000000000000000000000000000000000000000000000000000000000000000',
+   'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141',
+   'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF',
+  ].forEach((element) => {
+    assert.throws(() => {
+      ecdh5.setPrivateKey(element, 'hex');
+    }, errMessage);
+    // Verify object state did not change.
+    assert.strictEqual(ecdh5.getPrivateKey('hex'), cafebabeKey);
+  });
+}
+
+// Use of invalid keys was not cleaning up ERR stack, and was causing
+// unexpected failure in subsequent signing operations.
+if (availableCurves.has('prime256v1') && availableHashes.has('sha256')) {
+  const curve = crypto.createECDH('prime256v1');
+  const invalidKey = Buffer.alloc(65);
+  invalidKey.fill('\0');
+  curve.generateKeys();
+  assert.throws(
+    () => curve.computeSecret(invalidKey),
+    {
+      code: 'ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY',
+      name: 'Error',
+      message: 'Public key is not valid for specified curve'
+    });
+  // Check that signing operations are not impacted by the above error.
+  const ecPrivateKey =
+    '-----BEGIN EC PRIVATE KEY-----\n' +
+    'MHcCAQEEIF+jnWY1D5kbVYDNvxxo/Y+ku2uJPDwS0r/VuPZQrjjVoAoGCCqGSM49\n' +
+    'AwEHoUQDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNhB8i3mXyIMq704m2m52FdfKZ2\n' +
+    'pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' +
+    '-----END EC PRIVATE KEY-----';
+  crypto.createSign('SHA256').sign(ecPrivateKey);
+}

test/parallel/test-crypto-dh-modp2-views.js

@@ -0,0 +1,24 @@
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+const { modp2buf } = require('../common/crypto');
+
+const modp2 = crypto.createDiffieHellmanGroup('modp2');
+
+const views = common.getArrayBufferViews(modp2buf);
+for (const buf of [modp2buf, ...views]) {
+  // Ensure specific generator (string with encoding) works as expected with
+  // any ArrayBufferViews as the first argument to createDiffieHellman().
+  const exmodp2 = crypto.createDiffieHellman(buf, '02', 'hex');
+  modp2.generateKeys();
+  exmodp2.generateKeys();
+  const modp2Secret = modp2.computeSecret(exmodp2.getPublicKey())
+      .toString('hex');
+  const exmodp2Secret = exmodp2.computeSecret(modp2.getPublicKey())
+      .toString('hex');
+  assert.strictEqual(modp2Secret, exmodp2Secret);
+}

test/parallel/test-crypto-dh-modp2.js

@@ -0,0 +1,43 @@
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+const { modp2buf } = require('../common/crypto');
+const modp2 = crypto.createDiffieHellmanGroup('modp2');
+
+{
+  // Ensure specific generator (buffer) works as expected.
+  const exmodp2 = crypto.createDiffieHellman(modp2buf, Buffer.from([2]));
+  modp2.generateKeys();
+  exmodp2.generateKeys();
+  const modp2Secret = modp2.computeSecret(exmodp2.getPublicKey())
+      .toString('hex');
+  const exmodp2Secret = exmodp2.computeSecret(modp2.getPublicKey())
+      .toString('hex');
+  assert.strictEqual(modp2Secret, exmodp2Secret);
+}
+
+{
+  // Ensure specific generator (string without encoding) works as expected.
+  const exmodp2 = crypto.createDiffieHellman(modp2buf, '\x02');
+  exmodp2.generateKeys();
+  const modp2Secret = modp2.computeSecret(exmodp2.getPublicKey())
+      .toString('hex');
+  const exmodp2Secret = exmodp2.computeSecret(modp2.getPublicKey())
+      .toString('hex');
+  assert.strictEqual(modp2Secret, exmodp2Secret);
+}
+
+{
+  // Ensure specific generator (numeric) works as expected.
+  const exmodp2 = crypto.createDiffieHellman(modp2buf, 2);
+  exmodp2.generateKeys();
+  const modp2Secret = modp2.computeSecret(exmodp2.getPublicKey())
+      .toString('hex');
+  const exmodp2Secret = exmodp2.computeSecret(modp2.getPublicKey())
+      .toString('hex');
+  assert.strictEqual(modp2Secret, exmodp2Secret);
+}

test/parallel/test-crypto-dh-shared.js

@@ -0,0 +1,15 @@
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto)
+  common.skip('missing crypto');
+
+const assert = require('assert');
+const crypto = require('crypto');
+
+const alice = crypto.createDiffieHellmanGroup('modp5');
+const bob = crypto.createDiffieHellmanGroup('modp5');
+alice.generateKeys();
+bob.generateKeys();
+const aSecret = alice.computeSecret(bob.getPublicKey()).toString('hex');
+const bSecret = bob.computeSecret(alice.getPublicKey()).toString('hex');
+assert.strictEqual(aSecret, bSecret);