/// <summary>
/// 验签，返回token字符串
/// </summary>
/// <param name="strResult">创建订单返回信息</param>
/// <param name="sellprivatekey">商户私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>token字符串</returns>
private static string Res_dataDecrypt(string strResult, AliPayChannel pChannel, string input_charset, bool needCheck = false)
{
//分解返回数据 用&拆分赋值给result
string[] result = strResult.Split('&');
//提取res_data参数
string res_data = string.Empty;
for (int i = 0; i < result.Length; i++)
{
string data = result[i];
if (data.IndexOf("res_data=") >= 0)
{
res_data = data.Replace("res_data=", string.Empty);
//解密(用"商户私钥"对"res_data"进行解密)
res_data = AliPayFunction.Decrypt(res_data, pChannel.RSA_PrivateKey, input_charset);
//res_data 赋值 给 result[0]
result[i] = "res_data=" + res_data;
}
}
//创建待签名数组
SortedDictionary <string, string> sd = new SortedDictionary <string, string>();
int count = 0;
string sparam = "";
string key = "";
string value = "";
for (int i = 0; i < result.Length; i++)
{
sparam = result[i];
count = sparam.IndexOf('=');
key = sparam.Substring(0, count);
value = sparam.Substring(count + 1, sparam.Length - (count + 1));
sd.Add(key, value);
}
string sign = sd["sign"];
//配置待签名数据
Dictionary <string, string> dicData = AliPayFunction.FilterPara(sd);
string req_Data = AliPayFunction.CreateLinkString(dicData);
//验签，使用支付宝公钥
bool vailSign = RSAFromPkcs8.Verify(req_Data, sign, pChannel.RSA_PublicKey, input_charset);
if (!needCheck)
{
vailSign = true;
}
if (vailSign)//验签通过
{
//得到 request_token 的值
string token = string.Empty;
try
{
token = AliPayFunction.GetStrForXmlDoc(res_data, "direct_trade_create_res/request_token");
}
catch (Exception ex)
{
throw new Exception("方法：AliPayFunction.GetStrForXmlDoc（）解析数据失败", ex);
}
return(token);
}
else
{
throw new Exception("返回的数据未通过验证，验签失败");
}
}