使用 HMAC-SHA1 加密创建 OAuth 签名 returns HTTP 401

Question

问题
我需要向需要 OAuth 加密的 API 进行身份验证。

我的方向是正确的，但我确信我的签名基本字符串有问题。由于 HMACSHA1 哈希基于 Key 和 BaseString，因此我得到了一个错误 oauth_signature.

到目前为止
我已经能够收集到所有需要的数据，其中包括：

Consumer Key

Consumer Secret

Acces Token

Acces Secret

Sha1Hased Value (Based on Key and Message, where Message is the signature Base string)

Signature Base String

问题
由于签名无效，我收到返回的 HTTP（401 错误请求）。

注意： 我很确定这是我构建 签名基础字符串 的方式。有关我使用的 API 文档的信息，请查看底部页面。

代码

GetOAuthToken（执行实际请求）

public static string GetAuthorizationToken()
{
    string TimeInSecondsSince1970 = ((int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds).ToString();
    string Nonce = System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(TimeInSecondsSince1970
    + TimeInSecondsSince1970 + TimeInSecondsSince1970));
    HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(GetAppleApiUrl.GetUrl(AppleApiUrl.SESSION_TOKEN));
    httpWebRequest.Method = "GET";

    string consumer_secret = Uri.EscapeDataString(Settings.SettingsManager.consumer_secret);
    string token_secret = Uri.EscapeDataString(Settings.SettingsManager.access_secret);

    string signature_base_string = GetSignatureBaseString(TimeInSecondsSince1970, Nonce);
    string SHA1HASH = GetSha1Hash(consumer_secret + "&" + token_secret, signature_base_string);
                
    string Header =
       "OAuth realm=" + '"' + "ADM" + '"' + "," +
       "oauth_consumer_key=" + '"' + Settings.SettingsManager.consumer_key + '"' + "," +
       "oauth_token=" + '"' + Settings.SettingsManager.access_token + '"' + "," +
       "oauth_signature_method=" + '"' + "HMAC-SHA1" + '"' + "," +
       "oauth_signature= " + '"' + SHA1HASH + '"' + "," + 
       "oauth_timestamp=" + '"' + TimeInSecondsSince1970 + '"' + "," +
       "oauth_nonce=" + '"' + Nonce + '"' + "," +
       "oauth_version=" + '"' + "1.0" + '"' + ",";
   
    httpWebRequest.Headers.Add(HttpRequestHeader.Authorization, Header);
    var Result = httpWebRequest.GetResponse();

    return Result.ToString();
}

GetSha1Hash

public static string GetSha1Hash(string key, string message)
{
    var encoding = new System.Text.ASCIIEncoding();

    byte[] keyBytes = encoding.GetBytes(key);
    byte[] messageBytes = encoding.GetBytes(message);

    string Sha1Result = string.Empty;

    using (HMACSHA1 SHA1 = new HMACSHA1(keyBytes))
    {
        var Hashed = SHA1.ComputeHash(messageBytes);
        Sha1Result = Convert.ToBase64String(Hashed);
    }

    return Sha1Result;
}

GetSignatureBaseString

public static string GetSignatureBaseString(string TimeStamp, string Nonce)
{
    //1.Convert the HTTP Method to uppercase and set the output string equal to this value.
    string Signature_Base_String = "Get";
    Signature_Base_String = Signature_Base_String.ToUpper();

    //2.Append the ‘&’ character to the output string.
    Signature_Base_String = Signature_Base_String + "&";

    //3.Percent encode the URL and append it to the output string.
    string PercentEncodedURL = Uri.EscapeDataString(GetAppleApiUrl.GetUrl(AppleApiUrl.SESSION_TOKEN));
    Signature_Base_String = Signature_Base_String + PercentEncodedURL;

    //4.Append the ‘&’ character to the output string.
    Signature_Base_String = Signature_Base_String + "&";

    //5.append parameter string to the output string.
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("oauth_consumer_key=" + Settings.SettingsManager.consumer_key);
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("&oauth_token=" + Settings.SettingsManager.access_token);
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("&oauth_signature_method=" +"HMAC-SHA1");
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("&oauth_timestamp=" + TimeStamp);
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("&oauth_nonce=" + Nonce);
    Signature_Base_String = Signature_Base_String + Uri.EscapeDataString("&oauth_version=" + "1.0");

    return Signature_Base_String;
}

结果（Fiddler）

API 文档

Answer 1

您应该按照 Header 字符串和 GetSignatureBaseString 方法中的字母顺序对参数进行排序，如 this comment and Twitter OAuth documentation

中所述

使用 HMAC-SHA1 加密创建 OAuth 签名 returns HTTP 401

Create OAuth Signature with HMAC-SHA1 Encryption returns HTTP 401

.net

c#

http

oauth

hmac