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'use strict';
var common = require('../common.js');
var bench = common.createBenchmark(main, {
writes: [500],
cipher: [ 'AES192', 'AES256' ],
type: ['asc', 'utf', 'buf'],
len: [2, 1024, 102400, 1024 * 1024],
api: ['legacy', 'stream']
});
function main(conf) {
var api = conf.api;
if (api === 'stream' && process.version.match(/^v0\.[0-8]\./)) {
console.error('Crypto streams not available until v0.10');
// use the legacy, just so that we can compare them.
api = 'legacy';
}
var crypto = require('crypto');
var assert = require('assert');
var alice = crypto.getDiffieHellman('modp5');
var bob = crypto.getDiffieHellman('modp5');
alice.generateKeys();
bob.generateKeys();
var pubEnc = /^v0\.[0-8]/.test(process.version) ? 'binary' : null;
var alice_secret = alice.computeSecret(bob.getPublicKey(), pubEnc, 'hex');
var bob_secret = bob.computeSecret(alice.getPublicKey(), pubEnc, 'hex');
// alice_secret and bob_secret should be the same
assert(alice_secret == bob_secret);
var alice_cipher = crypto.createCipher(conf.cipher, alice_secret);
var bob_cipher = crypto.createDecipher(conf.cipher, bob_secret);
var message;
var encoding;
switch (conf.type) {
case 'asc':
message = new Array(conf.len + 1).join('a');
encoding = 'ascii';
break;
case 'utf':
message = new Array(conf.len / 2 + 1).join('ü');
encoding = 'utf8';
break;
case 'buf':
message = Buffer.alloc(conf.len, 'b');
break;
default:
throw new Error('unknown message type: ' + conf.type);
}
var 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, conf.writes);
}
function streamWrite(alice, bob, message, encoding, writes) {
var written = 0;
bob.on('data', function(c) {
written += c.length;
});
bob.on('end', function() {
// Gbits
var bits = written * 8;
var 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) {
var written = 0;
var enc, dec;
for (var 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;
var gbits = written / (1024 * 1024 * 1024);
bench.end(gbits);
}
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