weapp sm crypto library
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README.md

sm-crypto

小程序 js 库。国密算法 sm2、sm3 和 sm4 的实现。

使用此组件需要依赖小程序基础库 2.2.1 以上版本,同时依赖开发者工具的 npm 构建。具体详情可查阅官方 npm 文档

安装

npm install --save miniprogram-sm-crypto

sm2

获取密钥对

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

let keypair = sm2.generateKeyPairHex();

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

加密解密

const sm2 = require('miniprogram-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('miniprogram-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,
});

获取椭圆曲线点

const sm2 = require('miniprogram-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('miniprogram-sm-crypto').sm3;

let hashData = sm3('abc'); // 杂凑

sm4

加密

const sm4 = require('miniprogram-sm-crypto').sm4;
const key = [0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10];

let encryptData = sm4.encrypt([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10], key); // 加密

解密

const sm4 = require('miniprogram-sm-crypto').sm4;
const key = [0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10];

let decryptData = sm4.decrypt([0x68, 0x1e, 0xdf, 0x34, 0xd2, 0x06, 0x96, 0x5e, 0x86, 0xb3, 0xe9, 0x4f, 0x53, 0x6e, 0x42, 0x46], key); // 解密