sm-crypto

国密算法sm2、sm3和sm4的js版。

• 支持压缩公钥, 默认压缩公钥.
• 支持生成助记词.
• 支持从助记词生成密钥对.

PS: 从压缩公钥导出非压缩公钥有失败的可能, 因为导出算法只有部分实现.

PS2: 小程序移植版：https://github.com/wechat-miniprogram/sm-crypto

安装

npm install --save sm-crypto

sm2

生成非压缩的公钥

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

let keypair = sm2.generateKeyPairHex(false);

publicKey = keypair.publicKey; // 非压缩公钥
privateKey = keypair.privateKey; // 私钥

生成带助记词的密钥对

const mnemonic = require('sm-crypto').mnemonic;
let memos = mnemonic.generateKeyPairAndMnemonic();

let mnemonics = memos.mnemonic;
let publicKey = memos.publicKey;  // 压缩公钥
let privateKey = memos.privateKey; 

let keypair = mnemonic.generateKeyPairByMnemonic(mnemonics, false);
let publicKey1 = keypair.publicKey; // 非压缩公钥
let privateKey1 = keypair.privateKey;

assert (privateKey == privateKey1, 'fatal error');

获取密钥对

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

let keypair = sm2.generateKeyPairHex();

publicKey = keypair.publicKey; // 压缩公钥
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,
});

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 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('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

协议

MIT