国密 sm2,sm3,sm4 算法纯 JavaScript 实现

比眉伴天荒 2022-12-19 09:30 165阅读 0赞

> 2014 年国务院办公厅就颁发了《国务院办公厅转发密码局等部门关于金融领域密码应用指导意见》，指出在我国涉及到金融领域信息安全的产品和系统要自主可控，在金融领域使用国产加密标准是机构走向合规化的重要一步。常用的国密算法包括：SM2、SM3、SM4等。

## 特性 ##

*  兼容 Node.js & Browsers 环境
 *  支持多种数据类型 `String` & `ArrayBuffer` & `Buffer`
 *  支持多种编码 `hex` & `utf8` & `base64`

## 安装 ##

*  npm

npm install gm-crypto

*  yarn

yarn add gm-crypto

## 快速开始 ##

> 浏览器端写法调整为 `import { SM2, SM3, SM4 } from 'gm-crypto'`

#### SM2 ####

const {
         SM2 } = require('gm-crypto')
    
    const {
         publicKey, privateKey } = SM2.generateKeyPair()
    const originalData = 'SM2 椭圆曲线公钥密码算法'
    
    const encryptedData = SM2.encrypt(originalData, publicKey, {
        
      inputEncoding: 'utf8',
      outputEncoding: 'base64'
    })
    
    const decryptedData = SM2.decrypt(encryptedData, privateKey, {
        
      inputEncoding: 'base64',
      outputEncoding: 'utf8'
    })

#### SM3 ####

const {
         SM3 } = require('gm-crypto')
    
    console.log(SM3.digest('abc'))
    console.log(SM3.digest('YWJj', 'base64'))
    console.log(SM3.digest('616263', 'hex', 'base64'))

#### SM4 ####

const {
         SM4 } = require('gm-crypto')
    
    const key = '0123456789abcdeffedcba9876543210' // Any string of 32 hexadecimal digits
    const originalData = 'SM4 国标对称加密'
    
    /**
     * Block cipher modes:
     * - ECB: electronic codebook
     * - CBC: cipher block chaining
     */
    
    let encryptedData, decryptedData
    
    // ECB
    encryptedData = SM4.encrypt(originalData, key, {
        
      inputEncoding: 'utf8',
      outputEncoding: 'base64'
    })
    decryptedData = SM4.decrypt(encryptedData, key, {
        
      inputEncoding: 'base64',
      outputEncoding: 'utf8'
    })
    
    // CBC
    const iv = '0123456789abcdeffedcba9876543210' // Initialization vector(any string of 32 hexadecimal digits)
    encryptedData = SM4.encrypt(originalData, key, {
        
      iv,
      mode: SM2.constants.CBC,
      inputEncoding: 'utf8',
      outputEncoding: 'hex'
    })
    decryptedData = SM4.decrypt(encryptedData, key, {
        
      iv,
      mode: SM2.constants.CBC,
      inputEncoding: 'hex',
      outputEncoding: 'utf8'
    })

详情参考 [https://github.com/byte-fe/gm-crypto][https_github.com_byte-fe_gm-crypto]

[https_github.com_byte-fe_gm-crypto]: https://github.com/byte-fe/gm-crypto