Node.js实现国密算法

一、node.js环境安装

1 去官网下载压缩包，并放置到/usr/local/bin文件夹下

2 进行环境变量配置

vim /etc/profile

在环境变量文件的末尾添加

export NODEJS=/usr/local/bin/node-v16.18.1-linux-x64
export PATH=$PATH:$NODEJS/bin

3 验证安装情况

node -v
npm -v

成功安装示例：

二、gm-crypto module下载

npm install gm-crypto

以下为正确示例:

三、代码调试

1 sm2

首先进入root目录，查看刚刚下载的工作环境node_modules

进入路径node_modules，并创建sm2.js文件，验证代码如下：

const { SM2 } = require('gm-crypto')

const { publicKey, privateKey } = SM2.generateKeyPair()
const originalData = '20201307lcy'

const encryptedData = SM2.encrypt(originalData, publicKey, {
  inputEncoding: 'utf8',
  outputEncoding: 'base64'
})
console.log(encryptedData)

const decryptedData = SM2.decrypt(encryptedData, privateKey, {
  inputEncoding: 'base64',
  outputEncoding: 'utf8'
})
console.log(decryptedData)

编译指令：node sm2.js

2 sm3

创建验证文件sm3.js

vim sm3.js

const { SM3 } = require('gm-crypto')

console.log(SM3.digest('20201307'))
console.log(SM3.digest('lcy'))
console.log(SM3.digest('12345678'))

编译sm3.js

在线网站验证：http://lzltool.cn/SM3

3 sm4

vim sm4.js

const { SM4 } = require('gm-crypto')

const key = '0123456789abcdeffedcba9876543210' // Any string of 32 hexadecimal digits
const originalData = '20201307lcy'

/**
 * Block cipher modes:
 * - ECB: electronic codebook
 * - CBC: cipher block chaining
 */

let encryptedData, decryptedData

// ECB
encryptedData = SM4.encrypt(originalData, key, {
  inputEncoding: 'utf8',
  outputEncoding: 'base64'
})
console.log(encryptedData)

decryptedData = SM4.decrypt(encryptedData, key, {
  inputEncoding: 'base64',
  outputEncoding: 'utf8'
})
console.log(decryptedData)


console.log('\n')


// CBC
const iv = '0123456789abcdeffedcba9876543210' // Initialization vector(any string of 32 hexadecimal digits)
encryptedData = SM4.encrypt(originalData, key, {
  iv,
  mode: SM4.constants.CBC,
  inputEncoding: 'utf8',
  outputEncoding: 'hex'
})
console.log(encryptedData)

decryptedData = SM4.decrypt(encryptedData, key, {
  iv,
  mode: SM4.constants.CBC,
  inputEncoding: 'hex',
  outputEncoding: 'utf8'
})
console.log(decryptedData)

node sm4.js