gm-sm4-crypto

基于javascript和TypedArray的国密加密算法实现。

Implement of Chinese encrypt algorithm in JavaScript and TypedArray.

为了兼容浏览器环境和node.je环境，这里我们使用了TextEncoder和Base64.js。

Here we use TextEncoder and Base64.js for both browser and node.js environment.

由于使用了TextEncoder，所以暂时不支持Edge。Node.js版本最低为8，建议使用最新的LTS版本。

Because of using TextEncoder， this code cannot run in Edge browser. Node.js‘s version should at least be 8, and the newest LTS version is recommended.

新增特性

• 与openssl_encrypt和openssl_decrypt保持一致性，当密码长度小于16时，静默填充NUL；当密码长度大于16时，静默截断。
• 要使用openssl国密算法，openssl库需 >= 1.1.1

Roadmap

• [x] SM4
• [ ] SM3
• [ ] SM2

Documentation

Install

npm install gm-sm4

SM4

Init

const SM4 = require('gm-sm4').sm4

let sm4Config = {
  // encrypt/decypt main key; cannot be omitted
  key: 'JeF8U9wHFOMfs2Y8',

  // optional; can be 'cbc' or 'ecb'
  mode: 'cbc', // default

  // optional; when use cbc mode, it's necessary
  iv: 'UISwD9fW6cFh9SNS', // default is null

  // optional: this is the cipher data's type; Can be 'base64' or 'text'
  cipherType: 'base64' // default is base64
}

let sm4 = new SM4(sm4Config)

Encrypt

let plaintext = '中国国密加解密算法'
let ciphertext = sm4.encrypt(plaintext)
// ciphertext's result is 'j/+HgSpv8RZQI2YtSq0L1RnemiSokMm1VvLHSTt245U='

Decrypt

let ciphertext = 'j/+HgSpv8RZQI2YtSq0L1RnemiSokMm1VvLHSTt245U='
let plaintext = sm4.decrypt(ciphertext)
// plaintext's result is '中国国密加解密算法'

License

MIT