使用HMAC-SHA1加密创建OAuth签名返回HTTP 401

Question

问题
您好,我需要对需要OAuth加密的API进行身份验证.
我的方向正确,但我确信我的签名基本字符串有问题.由于HMACSHA1 Hash基于Key和BaseString,因此我得到了错误的oauth_signature.
OAuth签名流程

到目前为止,
我已经能够收集所有必需的数据,其中包括:

• 消费者密钥
• 消费者秘密
• Acces Token
• Acces Secret
• Sha1Hased Value(基于Key和Message,其中Message是签名Base string)
• 签名基本字符串

问题
我因签名无效而返回HTTP(401错误请求).
注意:我很确定这是我如何构建我的签名基本字符串.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(提琴手)
API文件

Answer 1

看起来您应该在Header字符串和GetSignatureBaseString方法中按字母顺序对参数进行排序,如本评论和Twitter OAuth文档中所述