如何使用Node.js Crypto创建HMAC-SHA1哈希?

时间:2011-09-20 04:29:53

标签: javascript node.js algorithm hash node-crypto

我想创建一个I love cupcakes哈希(使用密钥abcdeg签名)

如何使用Node.js Crypto创建该哈希?

3 个答案:

答案 0 :(得分:324)

加密文档:http://nodejs.org/api/crypto.html

var crypto = require('crypto')
  , text = 'I love cupcakes'
  , key = 'abcdeg'
  , hash

hash = crypto.createHmac('sha1', key).update(text).digest('hex')

答案 1 :(得分:90)

几年前,据说update()digest()是遗留方法,并引入了新的流API方法。现在文档说可以使用任何一种方法。例如:

var crypto    = require('crypto');
var text      = 'I love cupcakes';
var secret    = 'abcdeg'; //make this your secret!!
var algorithm = 'sha1';   //consider using sha256
var hash, hmac;

// Method 1 - Writing to a stream
hmac = crypto.createHmac(algorithm, secret);    
hmac.write(text); // write in to the stream
hmac.end();       // can't read from the stream until you call end()
hash = hmac.read().toString('hex');    // read out hmac digest
console.log("Method 1: ", hash);

// Method 2 - Using update and digest:
hmac = crypto.createHmac(algorithm, secret);
hmac.update(text);
hash = hmac.digest('hex');
console.log("Method 2: ", hash);

在节点v6.2.2和v7.7.2

上测试

https://nodejs.org/api/crypto.html#crypto_class_hmac。提供了更多使用流媒体方法的示例。

答案 2 :(得分:21)

Gwerder的解决方案无法正常工作,因为hash = hmac.read();在流完成之前就已经发生了。因此AngraX的问题。此示例中也不需要hmac.write语句。

而是这样做:

var crypto    = require('crypto');
var hmac;
var algorithm = 'sha1';
var key       = 'abcdeg';
var text      = 'I love cupcakes';
var hash;

hmac = crypto.createHmac(algorithm, key);

// readout format:
hmac.setEncoding('hex');
//or also commonly: hmac.setEncoding('base64');

// callback is attached as listener to stream's finish event:
hmac.end(text, function () {
    hash = hmac.read();
    //...do something with the hash...
});

更正式的,如果你愿意的话,行

hmac.end(text, function () {

可以写

hmac.end(text, 'utf8', function () {

因为在这个例子中text是一个utf字符串