C# 服务器无法对请求进行身份验证
我正在尝试使用C# 服务器无法对请求进行身份验证,c#,rest,azure,C#,Rest,Azure,我正在尝试使用WindowsAzure RESTAPI在azure表中插入实体。但我得到了以下WebException: <?xml version="1.0" encoding="utf-8" standalone="yes"?> <error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"> <code>AuthenticationFailed</co
WindowsAzure RESTAPI
在azure表中插入实体。但我得到了以下WebException:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<error xmlns="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<code>AuthenticationFailed</code>
<message xml:lang="en-US">
Server failed to authenticate the request. Make sure the
value of Authorization header is formed correctly including
the signature.
RequestId:bbcf614e-6a12-4fb0-be68-16246853111d
Time:2012-10-03T08:21:46.3010154Z
</message>
</error>
下面的代码创建授权标头:
private String CreateAuthorizationHeader(String canonicalizedString)
{
String signature = string.Empty;
using (HMACSHA256 hmacSha256 = new HMACSHA256(Encoding.UTF8.GetBytes(AzureStorageConstants.Key)))
{
Byte[] dataToHmac = Encoding.UTF8.GetBytes(canonicalizedString);
signature = Convert.ToBase64String(hmacSha256.ComputeHash(dataToHmac));
}
String authorizationHeader = String.Format(
CultureInfo.InvariantCulture,
"{0} {1}:{2}",
AzureStorageConstants.SharedKeyAuthorizationScheme,
AzureStorageConstants.Account,
signature);
return authorizationHeader;
}
用于生成canonicalizedString的代码
public void InsertEntity(string tablename, string artist, string title)
{
string requestmethod = "POST";
string urlpath = tablename;
string storageserviceversion = "2009-09-19";
string dateinrfc1123format = DateTime.UtcNow.ToString("R", CultureInfo.InvariantCulture);
string contentmd5 = string.Empty;
string contenttype = "application/atom+xml";
String canonicalizedresource = string.Format("/{0}/{1}", AzureStorageConstants.Account, urlpath);
String stringtosign = String.Format(
"{0}\n{1}\n{2}\n{3}\n{4}",
requestmethod,
contentmd5,
contenttype,
dateinrfc1123format,
canonicalizedresource);
String authorizationHeader = CreateAuthorizationHeader(stringtosign);
...
...
}
谁能告诉我我做错了什么吗?请更改以下代码行:
using (HMACSHA256 hmacSha256 = new HMACSHA256(Encoding.UTF8.GetBytes(AzureStorageConstants.Key)))
{
Byte[] dataToHmac = Encoding.UTF8.GetBytes(canonicalizedString);
signature = Convert.ToBase64String(hmacSha256.ComputeHash(dataToHmac));
}
到
基本上,您的代码是失败的,因为您使用的是Encoding.UTF8.GetBytes(accountKey)。我们需要使用Convert.FromBase64String(accountKey)
希望这能有所帮助。这是您之前问题的重复吗?没有重复。同一代码这次生成了不同的异常。请检查存储帐户的帐户密钥。此问题很可能是由不正确的存储帐户密钥引起的。在2个密钥(主键和备用键)中,我使用的是主键,但仍显示相同的异常我尝试了两个密钥,但都不工作Gaurav您可以解释为什么会出现此异常吗?不客气:)。问题在于帐户密钥从基于Base64的字符串转换为字节的方式。您使用的是Encoding.UTF8.GetBytes(字符串),但正确的方法应该是Convert.FromBase64String(字符串)。
using (HMACSHA256 hmacSha256 = new HMACSHA256(Convert.FromBase64String(AzureStorageConstants.Key)))
{
Byte[] dataToHmac = Encoding.UTF8.GetBytes(canonicalizedString);
signature = Convert.ToBase64String(hmacSha256.ComputeHash(dataToHmac));
}