[英]Making (POST) signed requests to AWS IAM using C#
我正在嘗試按照AWS文檔中給出的示例簽署AWS請求並在C#中進行ListUsers調用。 我已經到達生成簽名的最后階段(即准備提交簽名4請求示例中給出的簽名請求 )。 但我下面粘貼的代碼在提交時會拋出“錯誤請求”異常。
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);
}
}
我得到的輸出是:
Error Message: The remote server returned an error: (400) Bad Request.
有人可以幫助我在這里做錯了嗎?
編輯:
我終於自己解決了這個問題。 我不得不把它變成下面的。 (答案是針對RDS的,但我相信可以看出差異是什么)。
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);
有人可以幫助我在這里做錯了嗎?
也許,但我強烈建議一起跳過這一努力,只需使用優秀的AWS SDK for .NET代替所有AWS API交互,因為它確實通過為許多AWS服務提供.NET API來幫助消除編碼的復雜性,包括Amazon S3,Amazon EC2,DynamoDB等 。
但是如果你真的需要或者想要自己做,我建議你只看一下這些非常棒的SDK的源代碼,這些源代碼都可以在GitHub上找到 ,包括用於.NET的AWS SDK - 關於這個問題。你可能想要開始研究AWS4Signer.cs 。
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