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test-protocol-crypto.js
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'use strict';
const assert = require('assert');
const { randomBytes } = require('crypto');
const {
CIPHER_INFO,
MAC_INFO,
bindingAvailable,
NullCipher,
createCipher,
NullDecipher,
createDecipher,
} = require('../lib/protocol/crypto.js');
console.log(`Crypto binding ${bindingAvailable ? '' : 'not '}available`);
{
const PAIRS = [
// cipher, decipher
['native', 'native'],
['binding', 'native'],
['native', 'binding'],
['binding', 'binding'],
].slice(0, bindingAvailable ? 4 : 1);
[
{ cipher: null },
{ cipher: '[email protected]' },
{ cipher: '[email protected]' },
{ cipher: 'aes128-cbc', mac: '[email protected]' },
{ cipher: 'aes128-ctr', mac: 'hmac-sha1' },
{ cipher: 'arcfour', mac: 'hmac-sha2-256-96' },
].forEach((testConfig) => {
for (const pair of PAIRS) {
function onCipherData(data) {
ciphered = Buffer.concat([ciphered, data]);
}
function onDecipherPayload(payload) {
deciphered.push(payload);
}
function reset() {
ciphered = Buffer.alloc(0);
deciphered = [];
}
function reinit() {
if (testConfig.cipher === null) {
cipher = new NullCipher(1, onCipherData);
decipher = new NullDecipher(1, onDecipherPayload);
} else {
cipher = createCipher(config);
decipher = createDecipher(config);
}
}
let ciphered;
let deciphered;
let cipher;
let decipher;
let macSize;
let packet;
let payload;
let cipherInfo;
let config;
console.log('Testing cipher: %s, mac: %s (%s encrypt, %s decrypt) ...',
testConfig.cipher,
testConfig.mac
|| (testConfig.cipher === null ? '<none>' : '<implicit>'),
pair[0],
pair[1]);
if (testConfig.cipher === null) {
cipher = new NullCipher(1, onCipherData);
decipher = new NullDecipher(1, onDecipherPayload);
macSize = 0;
} else {
cipherInfo = CIPHER_INFO[testConfig.cipher];
let macInfo;
let macKey;
if (testConfig.mac) {
macInfo = MAC_INFO[testConfig.mac];
macKey = randomBytes(macInfo.len);
macSize = macInfo.actualLen;
} else if (cipherInfo.authLen) {
macSize = cipherInfo.authLen;
} else {
throw new Error('Missing MAC for cipher');
}
const key = randomBytes(cipherInfo.keyLen);
const iv = (cipherInfo.ivLen
? randomBytes(cipherInfo.ivLen)
: Buffer.alloc(0));
config = {
outbound: {
onWrite: onCipherData,
cipherInfo,
cipherKey: Buffer.from(key),
cipherIV: Buffer.from(iv),
seqno: 1,
macInfo,
macKey: (macKey && Buffer.from(macKey)),
forceNative: (pair[0] === 'native'),
},
inbound: {
onPayload: onDecipherPayload,
decipherInfo: cipherInfo,
decipherKey: Buffer.from(key),
decipherIV: Buffer.from(iv),
seqno: 1,
macInfo,
macKey: (macKey && Buffer.from(macKey)),
forceNative: (pair[1] === 'native'),
},
};
cipher = createCipher(config);
decipher = createDecipher(config);
if (pair[0] === 'binding')
assert(/binding/i.test(cipher.constructor.name));
else
assert(/native/i.test(cipher.constructor.name));
if (pair[1] === 'binding')
assert(/binding/i.test(decipher.constructor.name));
else
assert(/native/i.test(decipher.constructor.name));
}
let expectedSeqno;
// Test zero-length payload ==============================================
payload = Buffer.alloc(0);
expectedSeqno = 2;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test single byte payload ==============================================
payload = Buffer.from([ 0xEF ]);
expectedSeqno = 3;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, 3);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test large payload ====================================================
payload = randomBytes(32 * 1024);
expectedSeqno = 4;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test sequnce number rollover ==========================================
payload = randomBytes(4);
expectedSeqno = 0;
cipher.outSeqno = decipher.inSeqno = (2 ** 32) - 1;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test chunked input -- split length bytes ==============================
payload = randomBytes(32 * 768);
expectedSeqno = 1;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, 2), undefined);
assert.strictEqual(decipher.decrypt(ciphered, 2, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test chunked input -- split length from payload =======================
payload = randomBytes(32 * 768);
expectedSeqno = 2;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(decipher.decrypt(ciphered, 0, 4), undefined);
assert.strictEqual(decipher.decrypt(ciphered, 4, ciphered.length),
undefined);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test chunked input -- split length and payload from MAC ===============
payload = randomBytes(32 * 768);
expectedSeqno = 3;
reset();
packet = cipher.allocPacket(payload.length);
payload.copy(packet, 5);
cipher.encrypt(packet);
assert.strictEqual(
decipher.decrypt(ciphered, 0, ciphered.length - macSize),
undefined
);
assert.strictEqual(
decipher.decrypt(ciphered, ciphered.length - macSize, ciphered.length),
undefined
);
assert.strictEqual(cipher.outSeqno, expectedSeqno);
assert(ciphered.length >= 9 + macSize);
assert.strictEqual(decipher.inSeqno, cipher.outSeqno);
assert.strictEqual(deciphered.length, 1);
assert.deepStrictEqual(deciphered[0], payload);
// Test packet length checks =============================================
[0, 2 ** 32 - 1].forEach((n) => {
reset();
packet = cipher.allocPacket(0);
packet.writeUInt32BE(n, 0); // Overwrite packet length field
cipher.encrypt(packet);
let threw = false;
try {
decipher.decrypt(ciphered, 0, ciphered.length);
} catch (ex) {
threw = true;
assert(ex instanceof Error);
assert(/packet length/i.test(ex.message));
}
if (!threw)
throw new Error('Expected error');
// Recreate deciphers since errors leave them in an unusable state.
// We recreate the ciphers as well so that internal states of both ends
// match again.
reinit();
});
// Test minimum padding length check =====================================
if (testConfig.cipher !== null) {
let payloadLen;
const blockLen = cipherInfo.blockLen;
if (/chacha|gcm/i.test(testConfig.cipher)
|| /etm/i.test(testConfig.mac)) {
payloadLen = blockLen - 2;
} else {
payloadLen = blockLen - 6;
}
const minLen = 4 + 1 + payloadLen + (blockLen + 1);
// We don't do strict equality checks here since the length of the
// returned Buffer can vary due to implementation details.
assert(cipher.allocPacket(payloadLen).length >= minLen);
}
// =======================================================================
cipher.free();
decipher.free();
if (testConfig.cipher === null)
break;
}
});
}
// Test createCipher()/createDecipher() exceptions
{
[
[
[true, null],
/invalid config/i
],
[
[{}],
[/invalid outbound/i, /invalid inbound/i]
],
[
[{ outbound: {}, inbound: {} }],
[/invalid outbound\.onWrite/i, /invalid inbound\.onPayload/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: true
},
inbound: {
onPayload: () => {},
decipherInfo: true
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: null
},
inbound: {
onPayload: () => {},
decipherInfo: null
},
},
],
[/invalid outbound\.cipherInfo/i, /invalid inbound\.decipherInfo/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: {},
cipherKey: {},
},
inbound: {
onPayload: () => {},
decipherInfo: {},
decipherKey: {},
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 32 },
cipherKey: Buffer.alloc(8),
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 32 },
decipherKey: Buffer.alloc(8),
},
},
],
[/invalid outbound\.cipherKey/i, /invalid inbound\.decipherKey/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 12 },
cipherKey: Buffer.alloc(1),
cipherIV: true
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 12 },
decipherKey: Buffer.alloc(1),
cipherIV: true
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 12 },
cipherKey: Buffer.alloc(1),
cipherIV: null
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 12 },
decipherKey: Buffer.alloc(1),
cipherIV: null
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 12 },
cipherKey: Buffer.alloc(1),
cipherIV: {}
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 12 },
decipherKey: Buffer.alloc(1),
cipherIV: {}
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 12 },
cipherKey: Buffer.alloc(1),
cipherIV: Buffer.alloc(1)
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 12 },
decipherKey: Buffer.alloc(1),
cipherIV: Buffer.alloc(1)
},
},
],
[/invalid outbound\.cipherIV/i, /invalid inbound\.decipherIV/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0 },
cipherKey: Buffer.alloc(1),
seqno: true
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0 },
decipherKey: Buffer.alloc(1),
seqno: true
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0 },
cipherKey: Buffer.alloc(1),
seqno: -1
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0 },
decipherKey: Buffer.alloc(1),
seqno: -1
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0 },
cipherKey: Buffer.alloc(1),
seqno: 2 ** 32
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0 },
decipherKey: Buffer.alloc(1),
seqno: 2 ** 32
},
},
],
[/invalid outbound\.seqno/i, /invalid inbound\.seqno/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: true
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: true
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: null
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: null
},
},
],
[/invalid outbound\.macInfo/i, /invalid inbound\.macInfo/i]
],
[
[
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 }
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 }
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: true
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: true
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: null
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: null
},
},
{ outbound: {
onWrite: () => {},
cipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
cipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: Buffer.alloc(1)
},
inbound: {
onPayload: () => {},
decipherInfo: { keyLen: 1, ivLen: 0, sslName: 'foo' },
decipherKey: Buffer.alloc(1),
seqno: 0,
macInfo: { keyLen: 16 },
macKey: Buffer.alloc(1)
},
},
],
[/invalid outbound\.macKey/i, /invalid inbound\.macKey/i]
],
].forEach((testCase) => {
let errorChecks = testCase[1];
if (!Array.isArray(errorChecks))
errorChecks = [errorChecks[0], errorChecks[0]];
for (const input of testCase[0]) {
assert.throws(() => createCipher(input), errorChecks[0]);
assert.throws(() => createDecipher(input), errorChecks[1]);
}
});
}