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'use strict';
const common = require('../common.js');
const bench = common.createBenchmark(main, {
writes: [500],
cipher: ['AES192', 'AES256'],
type: ['asc', 'utf', 'buf'],
len: [2, 1024, 102400, 1024 * 1024],
api: ['legacy', 'stream']
}, {
flags: ['--no-warnings']
});
function main({ api, cipher, type, len, writes }) {
if (api === 'stream' && /^v0\.[0-8]\./.test(process.version)) {
console.error('Crypto streams not available until v0.10');
// Use the legacy, just so that we can compare them.
api = 'legacy';
}
const crypto = require('crypto');
const assert = require('assert');
const alice = crypto.getDiffieHellman('modp5');
const bob = crypto.getDiffieHellman('modp5');
alice.generateKeys();
bob.generateKeys();
const pubEnc = /^v0\.[0-8]/.test(process.version) ? 'binary' : null;
const alice_secret = alice.computeSecret(bob.getPublicKey(), pubEnc, 'hex');
const bob_secret = bob.computeSecret(alice.getPublicKey(), pubEnc, 'hex');
// alice_secret and bob_secret should be the same
assert(alice_secret === bob_secret);
const alice_cipher = crypto.createCipher(cipher, alice_secret);
const bob_cipher = crypto.createDecipher(cipher, bob_secret);
let message;
let encoding;
switch (type) {
case 'asc':
message = 'a'.repeat(len);
encoding = 'ascii';
break;
case 'utf':
message = 'ü'.repeat(len / 2);
encoding = 'utf8';
break;
case 'buf':
message = Buffer.alloc(len, 'b');
break;
default:
throw new Error(`unknown message type: ${type}`);
}
const fn = api === 'stream' ? streamWrite : legacyWrite;
// Write data as fast as possible to alice, and have bob decrypt.
// use old API for comparison to v0.8
bench.start();
fn(alice_cipher, bob_cipher, message, encoding, writes);
}
function streamWrite(alice, bob, message, encoding, writes) {
let written = 0;
bob.on('data', (c) => {
written += c.length;
});
bob.on('end', () => {
// Gbits
const bits = written * 8;
const gbits = bits / (1024 * 1024 * 1024);
bench.end(gbits);
});
alice.pipe(bob);
while (writes-- > 0)
alice.write(message, encoding);
alice.end();
}
function legacyWrite(alice, bob, message, encoding, writes) {
let written = 0;
let enc, dec;
for (let i = 0; i < writes; i++) {
enc = alice.update(message, encoding);
dec = bob.update(enc);
written += dec.length;
}
enc = alice.final();
dec = bob.update(enc);
written += dec.length;
dec = bob.final();
written += dec.length;
const gbits = written / (1024 * 1024 * 1024);
bench.end(gbits);
}
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