Question

我正在尝试使用winrt中的azure存储。由于azure存储客户端与winrt不兼容，我试图使用azure的rest API。我有一点时间让签名正确，我可以用另一双眼睛帮助我看看我哪里出错了。

Azure帐户提供名称和密钥属性，此方法现在只需列出所有blob即可构建请求。

'private async void BuildHTTPRequest（AzureAccount帐户） { System.Net.Http.HttpClient request = new HttpClient（）;

    request.BaseAddress = new Uri(string.Format("http://{0}.blob.core.windows.net/", account.Name));

    // Always have to use UTC date/time
    request.DefaultRequestHeaders.Add("x-ms-date", DateTime.UtcNow.ToString("R", CultureInfo.InvariantCulture));

    string fmtStringToSign = "{0}\n{1}\n{2}\n{3:R}\n{4}{5}";

    request.DefaultRequestHeaders.Add("x-ms-version", "2011-08-18");

    string hdr = CanonicalizeHeaders(request.DefaultRequestHeaders);
    string authValue = string.Format(fmtStringToSign, "GET", "", "", "", hdr, "");
    byte[] signatureByteForm = System.Text.Encoding.UTF8.GetBytes(authValue);



    string hashKey = account.Key;

    MacAlgorithmProvider macAlgorithmProvider = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA256");
    BinaryStringEncoding encoding = BinaryStringEncoding.Utf8;
    var messageBuffer = CryptographicBuffer.ConvertStringToBinary(authValue, encoding);
    IBuffer keyBuffer = CryptographicBuffer.ConvertStringToBinary(hashKey, encoding);
    CryptographicKey hmacKey = macAlgorithmProvider.CreateKey(keyBuffer);
    IBuffer signedMessage = CryptographicEngine.Sign(hmacKey, messageBuffer);

    string hashedString = CryptographicBuffer.EncodeToBase64String(signedMessage);

    String authHeader = String.Format(CultureInfo.InvariantCulture, "{0} {1}:{2}", "SharedKey",
    account.Name, hashedString);

    request.DefaultRequestHeaders.Add("Authorization", authHeader);

    // Send the request to the queue
    try
    {
        var test1 = request.GetAsync("?comp=list").Result;
        if (test1.IsSuccessStatusCode)
        {

        }
    }
    catch (WebException ex) { }


}

这应该设置标题以进行签名......

public string CanonicalizeHeaders(System.Net.Http.Headers.HttpRequestHeaders hdrCollection)
{
    StringBuilder retVal = new StringBuilder();// Look for header names that start with "x-ms-"  // Then sort them in case-insensitive manner. 

    List<string> httpStorageHeaderNameArray = new List<string>();
    Dictionary<string, string> ht = new Dictionary<string, string>();

    foreach (var key in hdrCollection)
    {
        if (key.Key.ToLowerInvariant().StartsWith("x-ms-", StringComparison.Ordinal))
        {
            if (ht.ContainsKey(key.Key.ToLowerInvariant()))
            {
                ht[key.Key.ToLowerInvariant()] = string.Format("{0},{1}", ht[key.Key.ToLowerInvariant()],
                    hdrCollection.FirstOrDefault(m => m.Key == key.Key).ToString().Replace("\n", string.Empty).Replace("\r", string.Empty).Trim());
            }
            else
            {
                httpStorageHeaderNameArray.Add(key.Key.ToLowerInvariant());
                ht.Add(key.Key.ToLowerInvariant(),
                hdrCollection.FirstOrDefault(m => m.Key == key.Key).Value.FirstOrDefault().ToString().Replace("\n", string.Empty).Replace("\r", string.Empty).Trim());
            }
        }
    }

    httpStorageHeaderNameArray.Sort();// Now go through each header's values in the sorted order and append them to the canonicalized string.  
    foreach (string key in httpStorageHeaderNameArray)
    {
        retVal.AppendFormat("{0}:{1}\n", key.Trim(), ht[key]);
    }
    return retVal.ToString();
}

Answer 1

最新版本的存储客户端库支持WinRT。您可以在此处详细了解：http://blogs.msdn.com/b/windowsazurestorage/archive/2012/10/29/introducing-windows-azure-storage-client-library-2-0-for-net-and-windows-runtime.aspx。我所做的是从Github下载源代码：https://github.com/WindowsAzure/azure-sdk-for-net，在VS 2012中打开解决方案并构建RT项目以获取必要的winmd文件。

遇到你的问题，我相信你遇到了这个问题，因为你为规范化的资源字符串传递一个空字符串：

string authValue = string.Format(fmtStringToSign, "GET", "", "", "", hdr, "")

有关创建规范化资源字符串的更多详细信息，请参阅此链接：http://msdn.microsoft.com/en-us/library/windowsazure/dd179428.aspx。

使用Rest API在Winrt中使用Azure，签名有问题

1 个答案: