创建 HMAC BodyHash Sha256 nodejs

如何解决创建 HMAC BodyHash Sha256 nodejs

我正在尝试与使用 HMAC 身份验证的服务 (paysera https://developers.paysera.com/) 集成。我设法集成了每个 GET 端点。然而，当涉及到 POST 请求时，代码似乎不起作用。

createHMACAuth(data) {
    let bodyHash = crypto.createHash('sha256').update(JSON.stringify(data)).digest('base64');
    let method = 'POST';
    let path = `/rest/v1/transfers`;
    let ts = moment().unix();
    let nonce = GUID(32);
    let port = 443;
    let macString = `${ts}\n${nonce}\n${method}\n${path}\n${host}\n${port}\n${bodyHash || ''}\n`;
    let my_mac_key = 'my_mac_key';
    let my_mac_id = 'my_mac_id';
    let mac = crypto.createHmac('sha256',my_mac_key).update(macString).digest('base64');
    let headerString = `MAC id="${my_mac_id}",ts="${ts}",nonce="${nonce}",mac="${mac}",ext="body_hash=${bodyHash}"`;
    return  headerString;
  }
  
  let data = {
    key: 'value',otherkey: 'othervalue'
  };
  let headers = {
      Host: 'wallet.paysera.com','User-Agent': `Paysera node.js library`,mac_id: 'my_mac_id',Authorization: createHMACAuth(data);
   };

   POST_REQUEST(`${headers.host}/rest/v1/transfers`,data,headers,(err,res) => console.log(res))

我得到的回应是：

{ 
  error: 'unauthorized',error_description: 'Given MAC content body hash does not match actual hash of content' 
}

任何帮助将不胜感激！

解决方法

我在生成 body_hash 时出错

修复

  createHMACAuth(method,path,data) {
    let bodyHash,ext;
    if (method === 'POST') {
      ext = `body_hash=${encodeURIComponent(this.createHash(JSON.stringify(data)))}`;
    }
    this.method = method;
    this.path = `/${path}`;
    let nonce = `${U.GUID(32)}`;
    let port = 443;
    let macString = `${this.ts}\n${nonce}\n${this.method}\n${this.path}\n${this.host}\n${port}\n${ext || ''}\n`;
    let mac = this.createHMACHash(macString);
    let headerString = `MAC id="${this.mac_id}",ts="${this.ts}",nonce="${nonce}",mac="${mac}"`;
    if (method === 'POST') headerString += `,ext="${ext}"`
    return  headerString;
  }