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@fanthos/sm-crypto

v0.2.5

Published

sm-crypto

Downloads

3

Readme

sm-crypto

国密算法sm2、sm3和sm4的js版。

PS: 小程序移植版:https://github.com/wechat-miniprogram/sm-crypto

安装

npm install --save sm-crypto

sm2

获取密钥对

const sm2 = require('sm-crypto').sm2

let keypair = sm2.generateKeyPairHex()

publicKey = keypair.publicKey // 公钥
privateKey = keypair.privateKey // 私钥

加密解密

const sm2 = require('sm-crypto').sm2
const cipherMode = 1 // 1 - C1C3C2,0 - C1C2C3,默认为1

let encryptData = sm2.doEncrypt(msgString, publicKey, cipherMode) // 加密结果
let decryptData = sm2.doDecrypt(encryptData, privateKey, cipherMode) // 解密结果

签名验签

ps:理论上来说,只做纯签名是最快的。

const sm2 = require('sm-crypto').sm2

// 纯签名 + 生成椭圆曲线点
let sigValueHex = sm2.doSignature(msg, privateKey) // 签名
let verifyResult = sm2.doVerifySignature(msg, sigValueHex, publicKey) // 验签结果

// 纯签名
let sigValueHex2 = sm2.doSignature(msg, privateKey, {
    pointPool: [sm2.getPoint(), sm2.getPoint(), sm2.getPoint(), sm2.getPoint()], // 传入事先已生成好的椭圆曲线点,可加快签名速度
}) // 签名
let verifyResult2 = sm2.doVerifySignature(msg, sigValueHex2, publicKey) // 验签结果

// 纯签名 + 生成椭圆曲线点 + der编解码
let sigValueHex3 = sm2.doSignature(msg, privateKey, {
    der: true,
}) // 签名
let verifyResult3 = sm2.doVerifySignature(msg, sigValueHex3, publicKey, {
    der: true,
}) // 验签结果

// 纯签名 + 生成椭圆曲线点 + sm3杂凑
let sigValueHex4 = sm2.doSignature(msg, privateKey, {
    hash: true,
}) // 签名
let verifyResult4 = sm2.doVerifySignature(msg, sigValueHex4, publicKey, {
    hash: true,
}) // 验签结果

// 纯签名 + 生成椭圆曲线点 + sm3杂凑(不做公钥推导)
let sigValueHex5 = sm2.doSignature(msg, privateKey, {
    hash: true,
    publicKey, // 传入公钥的话,可以去掉sm3杂凑中推导公钥的过程,速度会比纯签名 + 生成椭圆曲线点 + sm3杂凑快
})
let verifyResult5 = sm2.doVerifySignature(msg, sigValueHex5, publicKey, {
    hash: true,
    publicKey,
})

// 纯签名 + 生成椭圆曲线点 + sm3杂凑 + 不做公钥推 + 添加 userId(长度小于 8192)
// 默认 userId 值为 1234567812345678
let sigValueHex6 = sm2.doSignature(msgString, privateKey, {
    hash: true,
    publicKey,
    userId: 'testUserId',
})
let verifyResult6 = sm2.doVerifySignature(msgString, sigValueHex6, publicKey, {
    hash: true,
    userId: 'testUserId',
})

获取椭圆曲线点

const sm2 = require('sm-crypto').sm2

let poin = sm2.getPoint() // 获取一个椭圆曲线点,可在sm2签名时传入

sm3

const sm3 = require('sm-crypto').sm3

let hashData = sm3('abc') // 杂凑

sm4

加密

const sm4 = require('sm-crypto').sm4
const msg = 'hello world! 我是 juneandgreen.' // 可以为 utf8 串或字节数组
const key = '0123456789abcdeffedcba9876543210' // 可以为 16 进制串或字节数组,要求为 128 比特

let encryptData = sm4.encrypt(msg, key) // 加密,默认输出 16 进制字符串,默认使用 pkcs#5 填充
let encryptData = sm4.encrypt(msg, key, {padding: 'none'}) // 加密,不使用 padding
let encryptData = sm4.encrypt(msg, key, {padding: 'none', output: 'array'}) // 加密,不使用 padding,输出为字节数组

解密

const sm4 = require('sm-crypto').sm4
const encryptData = '0e395deb10f6e8a17e17823e1fd9bd98a1bff1df508b5b8a1efb79ec633d1bb129432ac1b74972dbe97bab04f024e89c' // 可以为 16 进制串或字节数组
const key = '0123456789abcdeffedcba9876543210' // 可以为 16 进制串或字节数组,要求为 128 比特

let decryptData = sm4.decrypt(encryptData, key) // 解密,默认输出 utf8 字符串,默认使用 pkcs#5 填充
let decryptData = sm4.decrypt(encryptData, key, {padding: 'none'}) // 解密,不使用 padding
let decryptData = sm4.decrypt(encryptData, key, {padding: 'none', output: 'array'}) // 解密,不使用 padding,输出为字节数组

协议

MIT