AWS IOT-Credential的作用域应该是正确的服务

Question

我试图访问一个简单的AWS IOT REST服务，但我还没有成功做到这一点。以下是我所做的。

>

我在aws中创建了一个iam用户，并下载了访问密钥和密钥

与该用户登录到AWS IOT并创建了一个“东西”

从该东西的属性中，我找到了影子的REST URL

使用带有新的“AWS签名”功能的邮递员，并为其提供了访问密钥、秘密密钥、区域(us-east-1)和服务名称(iot)

试图“得到”endpoint，这就是我得到的-

String awsAccessKey = "fasfasfasdfsdafs";
String awsSecretKey = "asdfasdfasfasdfasdfasdf/asdfsdafsd/fsdafasdf";

URL  endpointUrl = null;
String regionName = "us-east-1";
try {
    endpointUrl = new URL("https://dasfsdfasdf.iot.us-east-1.amazonaws.com/things/SOMETHING/shadow");
}catch (Exception e){
    e.printStackTrace();
}
Map<String, String> headers = new HashMap<String, String>();
headers.put("x-amz-content-sha256", AWSSignerBase.EMPTY_BODY_SHA256);

AWSSignerForAuthorizationHeader signer = new AWSSignerForAuthorizationHeader(
        endpointUrl, "GET", "iot", regionName);
String authorization = signer.computeSignature(headers,
        null, // no query parameters
        AWSSignerBase.EMPTY_BODY_SHA256,
        awsAccessKey,
        awsSecretKey);

// place the computed signature into a formatted 'Authorization' header
// and call S3
headers.put("Authorization", authorization);
String response = HttpUtils.invokeHttpRequest(endpointUrl, "GET", headers, null);
System.out.println("--------- Response content ---------");
System.out.println(response);
System.out.println("------------------------------------");

这给了我同样的错误-

--------- Request headers ---------
x-amz-content-sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Authorization: AWS4-HMAC-SHA256 Credential=fasfasfasdfsdafs/20160212/us-east-1/iot/aws4_request, SignedHeaders=host;x-amz-content-sha256;x-amz-date, Signature=3b2194051a8dde8fe617219c78c2a79b77ec92338028e9e917a74e8307f4e914
x-amz-date: 20160212T182525Z
Host: dasfsdfasdf.iot.us-east-1.amazonaws.com
--------- Response content ---------
{"message":"Credential should be scoped to correct service. ","traceId":"cd3e0d96-82fa-4da5-a4e1-b736af6c5e34"}
------------------------------------

有人能告诉我我做错了什么吗？AWS文档没有关于此错误的太多信息。请帮忙

Answer 1

如果IoT
使用Iotdata签名，请改为使用Iotdata签名。示例：

AWSSignerForAuthorizationHeader signer = new AWSSignerForAuthorizationHeader(
    endpointUrl, "GET", "iotdata", regionName);