/// <summary>
/// 生成请求时的签名
/// </summary>
/// <param name="sPara">请求给支付宝的参数数组</param>
/// <returns>签名结果</returns>
private static string BuildRequestMysign(Dictionary <string, string> sPara)
{
//把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
string prestr = Core.CreateLinkString(sPara);
//把最终的字符串签名，获得签名结果
string mysign = "";
switch (_sign_type)
{
case "MD5":
mysign = AlipayMD5.Sign(prestr, _key, _input_charset);
break;
case "RSA":
mysign = RSAFromPkcs8.sign(prestr, _private_key, _input_charset);
break;
case "0001":
mysign = RSAFromPkcs8.sign(prestr, _private_key, _input_charset);
break;
default:
mysign = "";
break;
}
return(mysign);
}
/// <summary>
/// 解密
/// </summary>
/// <param name="inputPara">要解密数据</param>
/// <returns>解密后结果</returns>
public Dictionary <string, string> Decrypt(Dictionary <string, string> inputPara)
{
try
{
inputPara["notify_data"] = RSAFromPkcs8.decryptData(inputPara["notify_data"], _private_key, _input_charset);
}
catch (Exception) { }
return(inputPara);
}
/// <summary>
/// 解析远程模拟提交后返回的信息
/// </summary>
/// <param name="strText">要解析的字符串</param>
/// <returns>解析结果</returns>
public static Dictionary <string, string> ParseResponse(string strText)
{
//以“&”字符切割字符串
string[] strSplitText = strText.Split('&');
//把切割后的字符串数组变成变量与数值组合的字典数组
Dictionary <string, string> dicText = new Dictionary <string, string>();
for (int i = 0; i < strSplitText.Length; i++)
{
//获得第一个=字符的位置
int nPos = strSplitText[i].IndexOf('=');
if (nPos > -1)
{
//获得字符串长度
int nLen = strSplitText[i].Length;
//获得变量名
string strKey = strSplitText[i].Substring(0, nPos);
//获得数值
string strValue = strSplitText[i].Substring(nPos + 1, nLen - nPos - 1);
//放入字典类数组中
dicText.Add(strKey, strValue);
}
}
if (dicText["res_data"] != null)
{
//解析加密部分字符串（RSA与MD5区别仅此一句）
if (_sign_type == "0001")
{
dicText["res_data"] = RSAFromPkcs8.decryptData(dicText["res_data"], _private_key, _input_charset);
}
//token从res_data中解析出来（也就是说res_data中已经包含token的内容）
XmlDocument xmlDoc = new XmlDocument();
try
{
xmlDoc.LoadXml(dicText["res_data"]);
string strRequest_token = xmlDoc.SelectSingleNode("/direct_trade_create_res/request_token").InnerText;
dicText.Add("request_token", strRequest_token);
}
catch (Exception exp)
{
dicText.Add("request_token", exp.ToString());
}
}
return(dicText);
}
/// <summary>
/// 获取返回时的签名验证结果
/// </summary>
/// <param name="inputPara">通知返回参数数组</param>
/// <param name="sign">对比的签名结果</param>
/// <param name="isSort">是否对待签名数组排序</param>
/// <returns>签名验证结果</returns>
private bool GetSignVeryfy(Dictionary <string, string> inputPara, string sign, bool isSort)
{
Dictionary <string, string> sPara = new Dictionary <string, string>();
//过滤空值、sign与sign_type参数
sPara = Core.FilterPara(inputPara);
if (isSort)
{
//根据字母a到z的顺序把参数排序
sPara = Core.SortPara(sPara);
}
else
{
sPara = SortNotifyPara(sPara);
}
//获取待签名字符串
string preSignStr = Core.CreateLinkString(sPara);
//获得签名验证结果
bool isSgin = false;
if (sign != null && sign != "")
{
switch (_sign_type)
{
case "MD5":
isSgin = AlipayMD5.Verify(preSignStr, sign, _key, _input_charset);
break;
case "RSA":
isSgin = RSAFromPkcs8.verify(preSignStr, sign, _public_key, _input_charset);
break;
case "0001":
isSgin = RSAFromPkcs8.verify(preSignStr, sign, _public_key, _input_charset);
break;
default:
break;
}
}
return(isSgin);
}