public static string getCheckValue(string merchantId, string returnUrl, string paymentTypeObjId, string amtStr, string merTransId)
{
string xmlKey = File.ReadAllText(".\\wwwroot\\" + merchantId + ".xml");//img/productimg/1/H1.jpg
RSAParameters PrvKeyInfo = RSAUtility.GetPrvKeyFromXmlString(xmlKey);
RSACng rsa = new RSACng();
rsa.ImportParameters(PrvKeyInfo);
string orgString = merchantId + merTransId + paymentTypeObjId + amtStr + returnUrl;
ASCIIEncoding byteConverter = new ASCIIEncoding();
byte[] orgData = byteConverter.GetBytes(orgString);
byte[] signedData = rsa.SignData(orgData, HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
return(Convert.ToBase64String(signedData));
}
public static bool PaymentVerify(HttpRequest curRequest, out string merId, out string amt, out string merTransId, out string transId, out string transTime)
{
merId = curRequest.Form["merId"].ToString();
amt = curRequest.Form["amt"].ToString();
merTransId = curRequest.Form["merTransId"].ToString();
transId = curRequest.Form["transId"].ToString();
transTime = curRequest.Form["transTime"].ToString();
string checkValue = curRequest.Form["checkValue"].ToString();
string PaymentPublicKey = File.ReadAllText(".\\wwwroot\\PaymentPublicKey.txt");
RSAParameters PubKeyInfo = RSAUtility.GetPubKeyFromXmlString(PaymentPublicKey);
string orgString = merId + merTransId + amt + transId + transTime;
ASCIIEncoding byteConverter = new ASCIIEncoding();
byte[] orgData = byteConverter.GetBytes(orgString);
byte[] signedData = Convert.FromBase64String(checkValue);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(PubKeyInfo);
return(rsa.VerifyData(orgData, signedData, HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1));
}