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@vincheung/cipher

v1.0.0

Published

JavaScript 加密库 crypto-js 的封装。

Downloads

6

Readme

cipher

JavaScript 加密库 crypto-js 的封装。

使用

Install:

npm install @vincheung/cipher -S

Import:

<script src="../dist/cipher.min.js"></script>

API

  • cipher 依赖 crypto-js 实现,暴露全局对象 Cipher

  • cipher 的默认加密模式为 ECB,填充方式为 PKCS7

  • Cipher 暴露加密方法 encrypt,解密方法 decrypt

  • encrypt:入参

    • data:明文

    • key:密钥

    • {}:配置

      • cipher:算法的名称

      • mode:模式

      • padding:填充

      • iv:向量

  • decrypt:入参

    • data:密文

    • key:密钥

    • {}:配置

      • cipher:算法的名称

      • mode:模式

      • padding:填充

      • iv:向量

      • compile:CryptoJS.enc.Utf8 转译,默认值 true(解密结果默认会使用 CryptoJS.enc.Utf8 转译,你可以使用 compile: false 来关闭转译)

  • Cipher 对象下的 CryptoJS 属性对象完整继承来源于 crypto-js,你仍可以通过 Cipher.CryptoJS 来使用 crypto-js 的所有功能

示例

import Cipher from 'cipher'

const message = 'https://github.com/vincheung/cipher'
const key = 'cipher'

// DES
const cipherDES = Cipher.encrypt(message, key, {
  cipher: 'DES',
})
const plainDES = Cipher.decrypt(cipherDES, key, {
  cipher: 'DES',
})
console.log(cipherDES)
console.log(plainDES)

// TripleDES
const cipherTripleDES = Cipher.encrypt(message, key, {
  cipher: 'TripleDES',
  mode: 'CBC',
  padding: 'ZeroPadding',
})
const plainTripleDES = Cipher.decrypt(cipherTripleDES, key, {
  cipher: 'TripleDES',
  mode: 'CBC',
  padding: 'ZeroPadding',
})
console.log(cipherTripleDES)
console.log(plainTripleDES)

// AES
const cipherAES = Cipher.encrypt(message, key, {
  cipher: 'AES',
})
const plainAES = Cipher.decrypt(cipherAES, key, {
  cipher: 'AES',
})
console.log(cipherAES)
console.log(plainAES)
// 假设密钥 key 的处理使用
import Cipher from 'cipher'

const { CryptoJS } = Cipher

const message = 'https://github.com/vincheung/cipher'
const key = 'cipher'

const keyHex = CryptoJS.enc.Utf8.parse(key)
const cipherDES = Cipher.encrypt(message, keyHex, {
  cipher: 'DES',
})

拓展

  • CBC 需要初始化向量 iv,来加密第一块 C0

  • PKCS5 只能用来填充 64bit 的数据块

  • 所有需要填充的地方都以 0 填充

  • 在不填充的情况下,加密内容不是 8bit 整数倍加密会报错

  • Java 的默认模式为 ECB,key 的 size 必须为 24默认填充方式为 PKCS5,没有 PKCS7

  • C# 的默认模式为 CBC,默认填充方式为 PKCS7

  • JavaScript 填充方式 PKCS7 对应 Java 填充方式 PKCS5,没有 PKCS5

兼容

cipher 使用广泛支持的 ES6 Object.assign,如果你的环境较为老旧,可以使用垫片 polyfill。

License

The MIT License.