如何在node.js中实现数字签名

mkdir digital-signature
cd digital-signature
npm init -y

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

// 生成密钥对
const { publicKey, privateKey } = crypto.generateKeyPairSync('rsa', {
  modulusLength: 2048,
  publicKeyEncoding: {
    type: 'spki',
    format: 'pem'
  },
  privateKeyEncoding: {
    type: 'pkcs8',
    format: 'pem'
  }
});

// 将密钥保存到文件
fs.writeFileSync('public_key.pem', publicKey);
fs.writeFileSync('private_key.pem', privateKey);

console.log('密钥对已生成并保存到文件');

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

// 读取私钥
const privateKey = fs.readFileSync('private_key.pem', 'utf8');

// 要签名的数据
const data = 'This is some data to sign';

// 创建签名
const sign = crypto.createSign('SHA256');
sign.update(data);
sign.end();

const signature = sign.sign(privateKey, 'hex');

console.log('签名:', signature);

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

// 读取公钥
const publicKey = fs.readFileSync('public_key.pem', 'utf8');

// 要验证的数据
const data = 'This is some data to sign';

// 签名
const signature = '...'; // 将之前生成的签名粘贴到这里

// 验证签名
const verify = crypto.createVerify('SHA256');
verify.update(data);
verify.end();

const isValid = verify.verify(publicKey, signature, 'hex');

console.log('签名是否有效:', isValid);

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

// 生成密钥对
const { publicKey, privateKey } = crypto.generateKeyPairSync('rsa', {
  modulusLength: 2048,
  publicKeyEncoding: {
    type: 'spki',
    format: 'pem'
  },
  privateKeyEncoding: {
    type: 'pkcs8',
    format: 'pem'
  }
});

// 将密钥保存到文件
fs.writeFileSync('public_key.pem', publicKey);
fs.writeFileSync('private_key.pem', privateKey);

console.log('密钥对已生成并保存到文件');

// 读取私钥
const privateKeyContent = fs.readFileSync('private_key.pem', 'utf8');

// 要签名的数据
const data = 'This is some data to sign';

// 创建签名
const sign = crypto.createSign('SHA256');
sign.update(data);
sign.end();

const signature = sign.sign(privateKeyContent, 'hex');

console.log('签名:', signature);

// 读取公钥
const publicKeyContent = fs.readFileSync('public_key.pem', 'utf8');

// 验证签名
const verify = crypto.createVerify('SHA256');
verify.update(data);
verify.end();

const isValid = verify.verify(publicKeyContent, signature, 'hex');

console.log('签名是否有效:', isValid);