未经授权的Azure IOT Hub Rest API [英] Azure IOT Hub Rest API Unauthorized

问题描述

我正在尝试通过以下链接使用Azure Iot集线器REST API创建设备

I am trying to use Azure Iot hub REST API to create device by following links

创建新的设备身份

控制对以下内容的访问权限物联网中心

我的http数据就像

{
    "status":"connected",
    "authentication":{ "symmetricKey":{
                "primaryKey":"key in shared access policies",
                "secondaryKey":"key in shared access policies"}
             },
    "statusReason":"reason",
    "deviceId":"test123"
}

我的标题就像

 ["Content-Type": "application/json", "Authorization": "SharedAccessSignature sig=(key in shared access policies public key)=&se=1481687791&skn=iothubowner&sr=(my iot hub name).azure-devices.net%2fdevices%2ftest123"]

但是我收到错误401

But i get error 401

{"Message":"ErrorCode:IotHubUnauthorizedAccess;Unauthorized","ExceptionMessage":"Tracking ID:(tracking id )-TimeStamp:12/14/2016 03:15:17"}

任何人都知道如何修复它或跟踪exceptionMessage吗?

Anyone know how to fixed it , or to track the exceptionMessage ?

推荐答案

401的问题可能在于您计算SAS的方式. 为IoT中心计算SAS的完整过程(在C#中)为:

The problem of 401 is, probably, in the way you are calculating the SAS. The full process to calculate a SAS for the IoT Hub (in C#) is:

private static readonly DateTime epochTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);

public static string SharedAccessSignature(string hostUrl, string policyName, string policyAccessKey, TimeSpan timeToLive)
{
  if (string.IsNullOrWhiteSpace(hostUrl))
  {
    throw new ArgumentNullException(nameof(hostUrl));
  }

  var expires = Convert.ToInt64(DateTime.UtcNow.Add(timeToLive).Subtract(epochTime).TotalSeconds).ToString(CultureInfo.InvariantCulture);
  var resourceUri = WebUtility.UrlEncode(hostUrl.ToLowerInvariant());
  var toSign = string.Concat(resourceUri, "\n", expires);
  var signed = Sign(toSign, policyAccessKey);

  var sb = new StringBuilder();
  sb.Append("sr=").Append(resourceUri)
    .Append("&sig=").Append(WebUtility.UrlEncode(signed))
    .Append("&se=").Append(expires);
  if (!string.IsNullOrEmpty(policyName))
  {
    sb.Append("&skn=").Append(WebUtility.UrlEncode(policyName));
  }
  return sb.ToString();
}

private static string Sign(string requestString, string key)
{
  using (var hmacshA256 = new HMACSHA256(Convert.FromBase64String(key)))
  {
    var hash = hmacshA256.ComputeHash(Encoding.UTF8.GetBytes(requestString));
    return Convert.ToBase64String(hash);
  }
}

如果要在IoTHub中创建设备，则必须具有一个具有完全权限的策略，这意味着: 注册表读取和写入，服务连接和设备连接. 如果需要有关C#的完整功能示例，请使用C#了解如何使用IoT中心REST API创建设备，请检查设备是否存在并将消息发送到我编写

If you want to create the device in the IoTHub you have to have a policy with full permissions that mean: Registry read and write, Service connect and Device connect. If you need a full functional example, in C#, about how use the IoT Hub REST API to create a device, check if a device exists and send messages to the IoT Hub I have wrote this post about it (the post is in spanish but I can imagine that what you need is just the code).

这篇关于未经授权的Azure IOT Hub Rest API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！