node . js crypto . creatediffihellman(prime length，生成器)方法

原文:https://www . geesforgeks . org/node-js-crypto-creatediffeiehellman prime length-generator-method/

crypto.createDiffieHellman()方法用于创建 DiffieHellman 密钥交换对象。此外，在可选的特定数字生成器的帮助下，创建素数位的素数。此外，如果没有定义生成器，则使用值 2。

语法:

crypto.createDiffieHellman( primeLength, generator )

参数:该方法接受两个参数，如上所述，如下所述:

• Prime number: This parameter holds multiple prime numbers.
• Generator: It can store numbers, strings, buffers, type data or data view type data. Its default value is 2.

返回值:返回 DiffieHellman 密钥交换对象。

以下示例说明了在 Node.js 中使用crypto . creatediffihellman()方法:

例 1:

// Node.js program to demonstrate the     
// crypto.createDiffieHellman() method

// Includes crypto module
const crypto = require('crypto');

// Defining prime length
var prime_length = 60;

// Creating DiffieHellman keyexchange object
var diffHell = crypto.createDiffieHellman(prime_length);

// Displays keys which are encoded
console.log(diffHell.generateKeys('base64'));

输出:

CoWIWpiwbCE=

例 2:

// Node.js program to demonstrate the     
// crypto.createDiffieHellman() method

// Includes crypto module
const crypto = require('crypto');

// Defining prime length and generator
var prime_length = 21;
var generator = 12;

// Creating DiffieHellman keyexchange
// object with all its parameter
var diffHell = crypto.createDiffieHellman(
               prime_length, generator);

// Displays keys which are encoded
console.log(diffHell.generateKeys('hex'));

// Displays public and private keys
console.log("Public Key : ",
      diffHell.getPublicKey('base64'));
console.log("Private Key : ",
      diffHell.getPrivateKey('base64'));

输出:

086501
Public Key :  CGUB
Private Key :  C1rL

参考:https://nodejs . org/API/crypt . html # crypt _ crypt _ create diff llman _ primelistgth _ generator

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