/// <summary>
/// 验签（排序验签）
/// </summary>
/// <param name="sArrary">待签名数组</param>
/// <param name="signedString">签名（支付宝返回sign）</param>
/// <param name="publickey">支付宝公钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>返回验签结果，true(相同)，false(不相同)</returns>
public static bool Verify(SortedDictionary <string, string> sArrary, string signedString, string publickey,
string input_charset)
{
Dictionary <string, string> sPara = Function.FilterPara(sArrary);
string content = Function.CreateLinkString(sPara);
bool b = RSAFromPkcs8.verify(content, signedString, publickey, input_charset);
return(b);
}
/// <summary>
/// 签名
/// </summary>
/// <param name="dicArrayPre">待签名字符串</param>
/// <param name="privatekey">商户私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>经过UrlEncode转码后的签名字符串</returns>
public static string BuildMysign(SortedDictionary <string, string> dicArrayPre, string privatekey, string input_charset)
{
Dictionary <string, string> dicArray = FilterPara(dicArrayPre);
string prestr = CreateLinkString(dicArray);
string mysign = RSAFromPkcs8.sign(prestr, privatekey, input_charset);
mysign = HttpUtility.UrlEncode(mysign, Encoding.GetEncoding(input_charset)); //此处需要对签名进行Encode，否则出现+号等特殊字符，通过base64转换并post提交给支付宝服务器会丢失，变成空格
return(mysign);
}
/// <summary>
/// 解密
/// </summary>
/// <param name="content">待解密字符串</param>
/// <param name="privateKey">商户私钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>返回明文</returns>
public static string Decrypt(string content, string privateKey, string input_charset)
{
string strDecryptData = RSAFromPkcs8.decryptData(content, privateKey, input_charset);
return(strDecryptData);
}
/// <summary>
/// 验签（不排序 Notify验签用这个）
/// </summary>
/// <param name="content">待验签字符串</param>
/// <param name="signedString">签名（支付宝返回sign）</param>
/// <param name="publickey">支付宝公钥</param>
/// <param name="input_charset">编码格式</param>
/// <returns>返回验签结果，true(相同)，false(不相同)</returns>
public static bool Verify(string content, string signedString, string publickey, string input_charset)
{
bool b = RSAFromPkcs8.verify(content, signedString, publickey, input_charset);
return(b);
}
/// <summary>
/// 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>
public static string Res_dataDecrypt(string strResult, string sellprivatekey, string input_charset)
{
//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 = Function.Decrypt(res_data, sellprivatekey, 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 = Function.FilterPara(sd);
string req_Data = Function.CreateLinkString(dicData);
//验签，使用支付宝公钥
bool vailSign = RSAFromPkcs8.verify(req_Data, sign, Config.Alipaypublick, input_charset);
if (vailSign)//验签通过
{
//得到 request_token 的值
string token = string.Empty;
try
{
token = Function.GetStrForXmlDoc(res_data, "direct_trade_create_res/request_token");
}
catch
{
//提示 返回token值无效
return(string.Empty);
}
return(token);
}
else
{
//验签不通过，这里商户自己写逻辑
return(string.Empty);
}
}
