C# .NET 按ASCII 从小到大排序,经过微信签名测试有效c# .net sha1加密的几种形式

C# .NET 按ASCII 从小到大排序；经过微信签名测试有效 

调用

Dictionary<string, string> parameters = new Dictionary<string, string>();
                parameters.Add("noncestr","Wm3WZYTPz0wzccnW");
                parameters.Add("jsapi_ticket","sM4AOVdWfPE4DxkXGEs8VMCPGGVi4C3VM0P37wVUCFvkVAy_90u5h9nbSlYy3-Sl-HhTdfl2fzFy1AOcHKP7qg");
                parameters.Add("timestamp", "1414587457");
                parameters.Add("url", "http://mp.weixin.qq.com?params=value");
               string JSSDK_SignStr= SignFactory.JSSDK_Signature(parameters);

中间件

/// <summary>
/// JS-SDK权限验证的签名
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
internal static string JSSDK_Signature(Dictionary<string, string> parameters)
{
  string resultStr = "";
  Dictionary<string, string> resultDic = AsciiDictionary(parameters); //核心-排序代码
  StringBuilder sb = new StringBuilder();
  foreach (var item in resultDic)
  {
    sb.Append($"{item.Key}={item.Value}&");
  }
  resultStr = sb.ToString().Trim('&'); 

   resultStr = Sha1Signature(resultStr, Encoding.UTF8);//Sha1 签名

  return resultStr;
}

c# .net sha1加密的几种形式

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核心-排序代码

/*
 * C#的SortedDictionary<string,string>集合对key不是按照ascii码排序的因为他没有区分大小写，这就是个差别。
 * 如果参数名中间有大写，小写，数字，SortedDictionary 排序出来，算的签名可能会与JAVA 验签不兼容， 验签失败。
 */
/// <summary>
/// 将集合key以ascii码从小到大排序 
/// </summary>
/// <param name="sArray"></param>
/// <returns></returns>
private static Dictionary<string, string> AsciiDictionary(Dictionary<string, string> sArray)
{
  Dictionary<string, string> asciiDic = new Dictionary<string, string>();
  string[] arrKeys = sArray.Keys.ToArray();
  Array.Sort(arrKeys, string.CompareOrdinal);
  foreach (var key in arrKeys)
  {
    string value = sArray[key];
    asciiDic.Add(key, value);
  }
  return asciiDic;
}

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