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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');
// Test Diffie-Hellman with two parties sharing a secret,
// using various encodings as we go along
const dh1 = crypto.createDiffieHellman(common.hasFipsCrypto ? 1024 : 256);
const p1 = dh1.getPrime('buffer');
const dh2 = crypto.createDiffieHellman(p1, 'buffer');
let key1 = dh1.generateKeys();
let key2 = dh2.generateKeys('hex');
let secret1 = dh1.computeSecret(key2, 'hex', 'base64');
let secret2 = dh2.computeSecret(key1, 'latin1', 'buffer');
assert.strictEqual(secret2.toString('base64'), secret1);
assert.strictEqual(dh1.verifyError, 0);
assert.strictEqual(dh2.verifyError, 0);
{
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`');
}
[
[0x1, 0x2],
() => { },
/abc/,
{}
].forEach((input) => {
common.expectsError(
() => crypto.createDiffieHellman(input),
{
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError,
message: 'The "sizeOrKey" argument must be one of type number, string, ' +
`Buffer, TypedArray, or DataView. Received type ${typeof input}`
}
);
});
// Create "another dh1" using generated keys from dh1,
// and compute secret again
const dh3 = crypto.createDiffieHellman(p1, 'buffer');
const privkey1 = dh1.getPrivateKey();
dh3.setPublicKey(key1);
dh3.setPrivateKey(privkey1);
assert.deepStrictEqual(dh1.getPrime(), dh3.getPrime());
assert.deepStrictEqual(dh1.getGenerator(), dh3.getGenerator());
assert.deepStrictEqual(dh1.getPublicKey(), dh3.getPublicKey());
assert.deepStrictEqual(dh1.getPrivateKey(), dh3.getPrivateKey());
assert.strictEqual(dh3.verifyError, 0);
const secret3 = dh3.computeSecret(key2, 'hex', 'base64');
assert.strictEqual(secret1, secret3);
// computeSecret works without a public key set at all.
const dh4 = crypto.createDiffieHellman(p1, 'buffer');
dh4.setPrivateKey(privkey1);
assert.deepStrictEqual(dh1.getPrime(), dh4.getPrime());
assert.deepStrictEqual(dh1.getGenerator(), dh4.getGenerator());
assert.deepStrictEqual(dh1.getPrivateKey(), dh4.getPrivateKey());
assert.strictEqual(dh4.verifyError, 0);
const secret4 = dh4.computeSecret(key2, 'hex', 'base64');
assert.strictEqual(secret1, secret4);
const wrongBlockLength = {
message: 'error:0606506D:digital envelope' +
' routines:EVP_DecryptFinal_ex:wrong final block length',
code: 'ERR_OSSL_EVP_WRONG_FINAL_BLOCK_LENGTH',
library: 'digital envelope routines',
reason: 'wrong final block length'
};
// Run this one twice to make sure that the dh3 clears its error properly
{
const c = crypto.createDecipheriv('aes-128-ecb', crypto.randomBytes(16), '');
assert.throws(() => {
c.final('utf8');
}, wrongBlockLength);
}
{
const c = crypto.createDecipheriv('aes-128-ecb', crypto.randomBytes(16), '');
assert.throws(() => {
c.final('utf8');
}, wrongBlockLength);
}
assert.throws(() => {
dh3.computeSecret('');
}, { message: 'Supplied key is too small' });
// Create a shared using a DH group.
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);
/* Ensure specific generator (buffer) works as expected.
* 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 modp2 = crypto.createDiffieHellmanGroup('modp2');
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
]);
{
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);
}
for (const buf of [modp2buf, ...common.getArrayBufferViews(modp2buf)]) {
// 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');
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);
}
// 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');
key1 = ecdh1.generateKeys();
key2 = ecdh2.generateKeys('hex');
secret1 = ecdh1.computeSecret(key2, 'hex', 'base64');
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
common.expectsError(
() => ecdh1.getPublicKey('buffer', 10),
{
code: 'ERR_CRYPTO_ECDH_INVALID_FORMAT',
type: TypeError,
message: 'Invalid ECDH format: 10'
});
// ECDH should check that point is on curve
const ecdh3 = crypto.createECDH('secp256k1');
const key3 = ecdh3.generateKeys();
common.expectsError(
() => ecdh2.computeSecret(key3, 'latin1', 'buffer'),
{
code: 'ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY',
type: 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');
}, /^Error: 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 = /^Error: Private key is not valid for specified curve\.$/;
['0000000000000000000000000000000000000000000000000000000000000000',
'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141',
'FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF',
].forEach((element) => {
assert.throws(() => {
ecdh5.setPrivateKey(element, 'hex');
}, errMessage);
// Verify object state did not change.
assert.strictEqual(ecdh5.getPrivateKey('hex'), cafebabeKey);
});
}
// Use of invalid keys was not cleaning up ERR stack, and was causing
// unexpected failure in subsequent signing operations.
if (availableCurves.has('prime256v1') && availableHashes.has('sha256')) {
const curve = crypto.createECDH('prime256v1');
const invalidKey = Buffer.alloc(65);
invalidKey.fill('\0');
curve.generateKeys();
common.expectsError(
() => curve.computeSecret(invalidKey),
{
code: 'ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY',
type: Error,
message: 'Public key is not valid for specified curve'
});
// Check that signing operations are not impacted by the above error.
const ecPrivateKey =
'-----BEGIN EC PRIVATE KEY-----\n' +
'MHcCAQEEIF+jnWY1D5kbVYDNvxxo/Y+ku2uJPDwS0r/VuPZQrjjVoAoGCCqGSM49\n' +
'AwEHoUQDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNhB8i3mXyIMq704m2m52FdfKZ2\n' +
'pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' +
'-----END EC PRIVATE KEY-----';
crypto.createSign('SHA256').sign(ecPrivateKey);
}
// Invalid test: curve argument is undefined
common.expectsError(
() => crypto.createECDH(),
{
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError,
message: 'The "curve" argument must be of type string. ' +
'Received type undefined'
});
assert.throws(
function() {
crypto.getDiffieHellman('unknown-group');
},
/^Error: Unknown group$/,
'crypto.getDiffieHellman(\'unknown-group\') ' +
'failed to throw the expected error.'
);
assert.throws(
function() {
crypto.getDiffieHellman('modp1').setPrivateKey('');
},
new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
'setPrivateKey is not a function$'),
'crypto.getDiffieHellman(\'modp1\').setPrivateKey(\'\') ' +
'failed to throw the expected error.'
);
assert.throws(
function() {
crypto.getDiffieHellman('modp1').setPublicKey('');
},
new RegExp('^TypeError: crypto\\.getDiffieHellman\\(\\.\\.\\.\\)\\.' +
'setPublicKey is not a function$'),
'crypto.getDiffieHellman(\'modp1\').setPublicKey(\'\') ' +
'failed to throw the expected error.'
);