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js 签名算法实现

2026-04-07 09:18:14JavaScript

js 签名算法实现

签名算法实现（JavaScript）

HMAC-SHA256 签名示例

const crypto = require('crypto');

function generateHMAC(secret, message) {
  return crypto
    .createHmac('sha256', secret)
    .update(message)
    .digest('hex');
}

const signature = generateHMAC('your-secret-key', 'data-to-sign');

RSA 签名示例

const crypto = require('crypto');
const fs = require('fs');

const privateKey = fs.readFileSync('private.pem');

function signWithRSA(data) {
  const sign = crypto.createSign('SHA256');
  sign.update(data);
  return sign.sign(privateKey, 'base64');
}

const signature = signWithRSA('important-data');

ECDSA 签名示例

const crypto = require('crypto');
const { privateKey } = crypto.generateKeyPairSync('ec', {
  namedCurve: 'secp256k1'
});

function signWithECDSA(data) {
  const sign = crypto.createSign('SHA256');
  sign.update(data);
  return sign.sign(privateKey, 'base64');
}

签名验证实现

// HMAC 验证
function verifyHMAC(secret, message, signature) {
  const expectedSig = generateHMAC(secret, message);
  return crypto.timingSafeEqual(
    Buffer.from(expectedSig),
    Buffer.from(signature)
  );
}

// RSA 验证
const publicKey = fs.readFileSync('public.pem');

function verifyRSA(data, signature) {
  const verify = crypto.createVerify('SHA256');
  verify.update(data);
  return verify.verify(publicKey, signature, 'base64');
}

浏览器环境实现

// Web Crypto API 示例
async function signWithWebCrypto() {
  const key = await window.crypto.subtle.generateKey(
    { name: 'HMAC', hash: 'SHA-256' },
    true,
    ['sign', 'verify']
  );

  const data = new TextEncoder().encode('message');
  const signature = await window.crypto.subtle.sign('HMAC', key, data);
  return Array.from(new Uint8Array(signature)).map(b => b.toString(16).padStart(2, '0')).join('');
}