使用npm threads
库,我尝试使用单独的线程而不是主线程以非阻塞方式创建diffie hellman:
const spawn = require('threads').spawn;
const thread = spawn(function(input, done) {
const cryptot = require('crypto');
const dh = cryptot.createDiffieHellman(2048);
done({dh});
});
thread.send({p:null, g:null}).on('message', (response) => {
console.log(response.dh.getPrime(), response.dh.getGenerator());
thread.kill();
}).on('error', (err)=>{
console.error(err);
}).on('exit', function() {
console.log('Worker has been terminated.');
});
但是出现以下错误:
/home/pcmagas/Kwdikas/master_thesis/custom_xmpp/dummy_src/thread_dh.js:10
console.log(response.dh.getPrime(), response.dh.getGenerator());
^
TypeError: response.dh.getPrime is not a function
at Worker.thread.send.on (/home/pcmagas/Kwdikas/master_thesis/custom_xmpp/dummy_src/thread_dh.js:10:27)
at Worker.emit (/home/pcmagas/Kwdikas/master_thesis/custom_xmpp/node_modules/eventemitter3/index.js:129:35)
at Worker.handleMessage (/home/pcmagas/Kwdikas/master_thesis/custom_xmpp/node_modules/threads/lib/worker.node/worker.js:148:17)
at ChildProcess.emit (events.js:182:13)
at emit (internal/child_process.js:812:12)
您知道为什么接收到的dh
对象不包含方法getPrime
以及通过假设getGenerator
也不包含方法吗?
答案 0 :(得分:0)
的确,在不使用生成器和启动的情况下,密钥生成在node.js中提供的实现上很慢。但是,它使速度变慢的原因是创建了正确的素数和生成器,其中素数将是 2048 位。
因此您可以执行以下操作:
message
事件这些步骤将由以下代码完成:
const spawn = require('threads').spawn;
const thread = spawn(function(input, done) {
const cryptot = require('crypto');
console.time('dh-thread');
const dh = cryptot.createDiffieHellman(2048);
console.timeEnd('dh-thread');
done({prime: dh.getPrime().toString('hex'), generator: dh.getGenerator().toString('hex')});
});
thread.send({p:null, g:null}).on('message', (response) => {
const cryptot = require('crypto');
const dh = cryptot.createDiffieHellman(response.prime, response.generator);
// Do whatever you want there
thread.kill();
}).on('error', (err)=>{
console.error(err);
}).on('exit', function() {
console.log('Worker has been terminated.');
});
为了证明我上面的陈述的正确性,让我使用计时器稍微修改一下代码:
const spawn = require('threads').spawn;
const thread = spawn(function(input, done) {
const cryptot = require('crypto');
console.time('dh-thread');
const dh = cryptot.createDiffieHellman(2048);
console.timeEnd('dh-thread');
done({prime: dh.getPrime().toString('hex'), generator: dh.getGenerator().toString('hex')});
});
thread.send({p:null, g:null}).on('message', (response) => {
console.time('dh');
const cryptot = require('crypto');
const dh = cryptot.createDiffieHellman(response.prime, response.generator);
console.timeEnd('dh');
thread.kill();
}).on('error', (err)=>{
console.error(err);
}).on('exit', function() {
console.log('Worker has been terminated.');
});
执行上面的代码将导致:
dh-thread: 12815.747ms
dh: 6.733ms
Worker has been terminated.
如您所见,没有素数和生成器的diffie hellman生成 WAY 时间过长,而不是提供的素数和生成器。