Node.js crypto.createHmac()方法
原文:https://www . geesforgeks . org/node-js-crypto-create hmac-method/
crypto.createHmac()方法用于创建使用所述“算法”和“密钥”的 Hmac 对象。
语法:
crypto.createHmac( algorithm, key, options )
参数:该方法接受如下所述的三个参数:
- algorithm: It depends on the accessible algorithm favored by OpenSSL version on the platform. It returns a string. Examples are sha256 , sha512 and so on.
- Key: is the HMAC key, which is used to create the encrypted HMAC hash. Return string , buffer , type data display , data view or key object . If it is a key object, then its type must be secret.
- option: is an optional parameter, which is used to control the popular behavior. It returns an object.
返回类型:返回 Hmac 对象。
下面的例子说明了 crypto.createHmac()方法在 Node.js 中的使用:
例 1:
// Node.js program to demonstrate the
// crypto.createHmac() method
// Includes crypto module
const crypto = require('crypto');
// Defining key
const secret = 'GfG';
// Calling createHmac method
const hash = crypto.createHmac('sha256', secret)
// updating data
.update('GeeksforGeeks')
// Encoding to be used
.digest('hex');
// Displays output
console.log(hash);
输出:
a08116905e92633e4f30eefd1276206b259305c8783642fc5b7f51c089187939
例 2:
// Node.js program to demonstrate the
// crypto.createHmac() method
// Defining myfile
const myfile = process.argv[1];
// Includes crypto and fs module
const crypto = require('crypto');
const fs = require('fs');
// Creating Hmac
const creathmac = crypto.createHmac('sha1', 'CS-Portal!');
// Creating read stream
const readfile = fs.createReadStream(myfile);
readfile.on('readable', () => {
// Calling read method to read data
const data = readfile.read();
if (data)
// Updating
creathmac.update(data);
else
{
// Encoding and displaying filename
console.log("The hmac object returns:",
`${creathmac.digest('hex')} ${myfile}`);
}
});
console.log("Program done!");
console.log();
输出:
Program done!
The hmac object returns: 4605d44703c2620fc2574c9a9216bd3267457324 /run_dir/interp.js
参考:https://nodejs . org/API/crypto . html # crypto _ crypto _ createhmac _ algorithm _ key _ options
版权属于：月萌API www.moonapi.com，转载请注明出处
