Node.js Sign用法及代碼示例

類：Sign

• 擴展： <stream.Writable>

Sign 類是用於生成簽名的實用程序。它可以通過以下兩種方式之一使用：

• 作為可寫 stream ，其中寫入要簽名的數據並使用 sign.sign() 方法生成並返回簽名，或者
• 使用 sign.update() 和 sign.sign() 方法生成簽名。

crypto.createSign() 方法用於創建Sign 實例。參數是要使用的哈希函數的字符串名稱。 Sign 對象不能直接使用new 關鍵字創建。

示例：使用 Sign 和 Verify 對象作為流：

const {
  generateKeyPairSync,
  createSign,
  createVerify
} = await import('node:crypto');

const { privateKey, publicKey } = generateKeyPairSync('ec', {
  namedCurve: 'sect239k1'
});

const sign = createSign('SHA256');
sign.write('some data to sign');
sign.end();
const signature = sign.sign(privateKey, 'hex');

const verify = createVerify('SHA256');
verify.write('some data to sign');
verify.end();
console.log(verify.verify(publicKey, signature, 'hex'));
// Prints: trueconst {
  generateKeyPairSync,
  createSign,
  createVerify,
} = require('node:crypto');

const { privateKey, publicKey } = generateKeyPairSync('ec', {
  namedCurve: 'sect239k1'
});

const sign = createSign('SHA256');
sign.write('some data to sign');
sign.end();
const signature = sign.sign(privateKey, 'hex');

const verify = createVerify('SHA256');
verify.write('some data to sign');
verify.end();
console.log(verify.verify(publicKey, signature, 'hex'));
// Prints: true

示例：使用 sign.update() 和 verify.update() 方法：

const {
  generateKeyPairSync,
  createSign,
  createVerify
} = await import('node:crypto');

const { privateKey, publicKey } = generateKeyPairSync('rsa', {
  modulusLength: 2048,
});

const sign = createSign('SHA256');
sign.update('some data to sign');
sign.end();
const signature = sign.sign(privateKey);

const verify = createVerify('SHA256');
verify.update('some data to sign');
verify.end();
console.log(verify.verify(publicKey, signature));
// Prints: trueconst {
  generateKeyPairSync,
  createSign,
  createVerify,
} = require('node:crypto');

const { privateKey, publicKey } = generateKeyPairSync('rsa', {
  modulusLength: 2048,
});

const sign = createSign('SHA256');
sign.update('some data to sign');
sign.end();
const signature = sign.sign(privateKey);

const verify = createVerify('SHA256');
verify.update('some data to sign');
verify.end();
console.log(verify.verify(publicKey, signature));
// Prints: true