使用C#向AWS IAM发出(POST)签名请求

我正在尝试遵循AWS文档Signing AWS requests中给出的示例,并在C#中进行ListUsers调用.我已经到达产生签名的最后阶段(即准备提交在signature-4 request examples给出的签名请求).但我下面粘贴的代码在提交时会抛出“错误请求”异常.

 static void submitSignedRequest(string my_access_key, string my_secret_key, string signature, string curr_utc_date_string, string curr_utc_datetime_string)
    {
        string url = "https://iam.amazonaws.com/?Action=ListUsers&Version=2010-05-08&X-Amz-Algorithm=AWS4-HMAC-SHA256&" +
                        "X-Amz-Credential=" + my_access_key + "/" + curr_utc_date_string + "/us-east-1/iam/aws4_request&X-Amz-Date=" + curr_utc_datetime_string +
                            "&X-Amz-SignedHeaders=content-type;host;x-amz-date&X-Amz-Signature=" + signature;
        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
        request.Method = "POST";
        request.Host = "iam.amazonaws.com";
        request.ContentType = "application/x-www-form-urlencoded; charset=utf-8";
        WebHeaderCollection headers = (request as HttpWebRequest).Headers;


        headers.Add("Authorization", "AWS4-HMAC-SHA256 Credential=" + my_access_key +"/" + curr_utc_date_string + "/us-east-1/iam/aws4_request, " +
            "SignedHeaders=content-type;host;x-amz-date, Signature=" + signature);
        headers.Add("x-amz-date", curr_utc_datetime_string);

        HttpWebResponse response;
        try
        {
            response = request.GetResponse() as HttpWebResponse;
        }
        catch (Exception ex)
        {

            Console.WriteLine("Error Message:    " + ex.Message);
        }
    }

我得到的输出是：

Error Message:    The remote server returned an error: (400) Bad Request.

有人可以帮助我在这里做错了吗？

编辑：

我终于自己解决了这个问题.我不得不把它变成下面的. (答案是针对RDS的,但我相信可以看出差异是什么).

string url = "https://rds.us-west-1.amazonaws.com";
        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

        //  ASCIIEncoding encoding = new ASCIIEncoding();
        string postData = "Action=DescribeDBInstances&Version=2013-09-09";
        byte[] data = Encoding.UTF8.GetBytes(postData);

        request.Method = "POST";
        request.Host = "rds.us-west-1.amazonaws.com";
        request.ContentType = "application/x-www-form-urlencoded; charset=utf-8";
        //  request.ContentLength = data.Length;

        using (Stream stream = request.GetRequestStream())
        {
            stream.Write(data, 0, data.Length);
        }

        WebHeaderCollection headers = (request as HttpWebRequest).Headers;

        request.Headers.Add("Authorization", "AWS4-HMAC-SHA256 Credential=" + my_access_key + "/" + curr_utc_date_string + "/us-west-1/rds/aws4_request, " +
            "SignedHeaders=content-type;host;x-amz-date, Signature=" + signature);
        request.Headers.Add("x-amz-date", curr_utc_datetime_string);

解决方法:

Can some one help me what wrong I am doing here?

也许,但我强烈建议一起跳过这一努力,只需将优秀的AWS SDK for .NET用于所有AWS API交互,因为它确实有助于通过为包括Amazon S3,Amazon在内的许多AWS服务提供.NET API来降低编码的复杂性EC2,DynamoDB等.

>我在AWS工作多年,在各种环境中使用各种语言,在没有他们提供的multitude of SDKs之一的帮助下,我甚至从未打算使用他们的API,其中大多数都提供高级工具除了首先使用各自语言使用API​​之外,还可以轻松完成.

但如果您真的需要或想要自己动手,我建议您只需查看这些SDK的源代码,这些都是available at GitHub,包括AWS SDK for .NET的源代码 – 关于手头的问题,您可能希望例如,开始研究AWS4Signer.cs.

>请注意,AWS刚刚发布了经过大幅改进的版本2,详见GA Release of AWS SDK for .NET Version 2.

标签：c,amazon-web-services,http-post,amazon-iam
来源： https://codeday.me/bug/20190624/1281488.html