private bool Verify(HttpRequestBase request, NameValueCollection requestVal, out AliPayReturnModel model)
{
bool result = false;
SortedDictionary <string, string> sortedDic = new SortedDictionary <string, string>();
foreach (var item in requestVal.AllKeys)
{
if (item.ToLower() != "sign" && item.ToLower() != "sign_type" && !string.IsNullOrEmpty(item))
{
sortedDic.Add(item, requestVal[item]);
}
}
string requestSign = requestVal["sign"];
string requestSigntype = requestVal["sign_type"];
string param = CreateURLParamString(sortedDic);
EnumSignType signType = requestSigntype == "MD5" ? EnumSignType.MD5
: requestSigntype == "RSA" ? EnumSignType.RSA
: EnumSignType.MD5;
if (signType == EnumSignType.MD5)
{
string sign = BuildRequestsign(param, signType);
if (requestSign.Equals(sign))
{
result = true;
}
}
else
{
result = RSAFromPkcs8.verify(param, requestSign, AlipayConfig.ALIPay_RSA_ALI_PUBLICKEY, "utf-8");
}
string responseText = GetResponseTxt(requestVal["notify_id"]);
bool resultVal = result && responseText == "true";
if (resultVal)
{
model = new AliPayReturnModel()
{
OutTradeNo = request.Form["out_trade_no"],
TradeNo = request.Form["trade_no"],
TradeStatus = request.Form["trade_status"]
};
decimal total_fee;
decimal.TryParse(request.Form["total_fee"], out total_fee);
model.TotalFee = total_fee;
}
else
{
model = null;
}
return(resultVal);
}
private string RSASign(string prestr, string privateKey, string input_charset)
{
try
{
return(RSAFromPkcs8.sign(prestr, privateKey, input_charset));
}
catch (Exception e)
{
return(e.Message);
}
}
