TypeScript中替代Utilities库实现computeHmacSignature方案问询

Node.js 环境实现 #

直接使用Node.js内置的crypto模块即可，无需额外依赖：

import * as crypto from 'crypto';

function computeHmacSignature(signatureBaseString: string, signingKey: string): Buffer {
  return crypto.createHmac('sha1', signingKey)
    .update(signatureBaseString)
    .digest();
}

// 调用示例
const signature = computeHmacSignature(signatureBaseString, this.getSigningKey());

若需和原Utilities返回的字节数组格式完全匹配，可将Buffer转为Uint8Array：

const signatureArray = new Uint8Array(computeHmacSignature(signatureBaseString, this.getSigningKey()));

浏览器环境实现 #

浏览器中使用Web Crypto API的SubtleCrypto接口（异步操作）：

async function computeHmacSignature(signatureBaseString: string, signingKey: string): Promise<Uint8Array> {
  const encoder = new TextEncoder();
  const keyBytes = encoder.encode(signingKey);
  const messageBytes = encoder.encode(signatureBaseString);

  const hmacKey = await window.crypto.subtle.importKey(
    'raw',
    keyBytes,
    { name: 'HMAC', hash: 'SHA-1' },
    false,
    ['sign']
  );

  const signatureBuffer = await window.crypto.subtle.sign('HMAC', hmacKey, messageBytes);
  return new Uint8Array(signatureBuffer);
}

// 调用示例（需在异步函数内执行）
const signature = await computeHmacSignature(signatureBaseString, this.getSigningKey());

可选格式转换 #

如果原代码需要将签名转为Base64字符串，可添加以下处理：

• Node.js：signature.toString('base64')
• 浏览器：btoa(String.fromCharCode(...signature))

内容的提问来源于stack exchange，提问作者Marco Castagnaro