protected void BuildResult(NameValueCollection formVariables, string MD5secretKey, string callbackPW)
{
this.cartId = formVariables["cartId"];
this.desc = formVariables["desc"];
this.transId = formVariables["transId"];
this.charenc = formVariables["charenc"];
this.callbackPW = formVariables["callbackPW"];
this.instId = formVariables["instId"];
this.testMode = formVariables["testMode"];
this.authMode = formVariables["authMode"];
this.amount = formVariables["amount"];
this.amountString = formVariables["amountString"];
this.cost = formVariables["cost"];
this.currency = formVariables["currency"];
this.authAmount = formVariables["authAmount"];
this.authAmountString = formVariables["authAmountString"];
this.authCost = formVariables["authCost"];
this.authCurrency = formVariables["authCurrency"];
this.transStatus = formVariables["transStatus"];
this.transTime = formVariables["transTime"];
this.rawAuthCode = formVariables["rawAuthCode"];
this.countryMatch = formVariables["countryMatch"];
this.rawAuthMessage = formVariables["rawAuthMessage"];
this.msgType = formVariables["msgType"];
this.AVS = formVariables["AVS"];
this.cardType = formVariables["cardType"];
this.ipAddress = formVariables["ipAddress"];
this.name = formVariables["name"];
this.address1 = formVariables["address1"];
this.address2 = formVariables["address2"];
this.address3 = formVariables["address3"];
this.region = formVariables["region"];
this.postcode = formVariables["postcode"];
this.country = formVariables["country"];
this.countryString = formVariables["countryString"];
this.tel = formVariables["tel"];
this.fax = formVariables["fax"];
this.email = formVariables["email"];
this.delvName = formVariables["delvName"];
this.delvAddress1 = formVariables["delvAddress1"];
this.delvAddress2 = formVariables["delvAddress2"];
this.delvAddress3 = formVariables["delvAddress3"];
this.delvTown = formVariables["delvTown"];
this.delvRegion = formVariables["delvRegion"];
this.delvPostcode = formVariables["delvPostcode"];
this.delvCountry = formVariables["delvCountry"];
this.delvCountryString = formVariables["delvCountryString"];
this.MC_callbacksignature = formVariables["MC_callbacksignature"];
var hashInputs = new StringBuilder();
hashInputs.Append(MD5secretKey);
hashInputs.Append(":");
hashInputs.Append(this.currency);
hashInputs.Append(":");
hashInputs.Append(this.cartId);
hashInputs.Append(":");
hashInputs.Append(this.amount);
byte[] hashDigest = new MD5CryptoServiceProvider().ComputeHash(ProviderUtils.StringToByteArray(hashInputs.ToString()));
string newhash = ProviderUtils.ByteArrayToHexString(hashDigest);
//Check if Callback Password matches
if (newhash != this.MC_callbacksignature || this.callbackPW != callbackPW)
{
throw new Exception("Callback hash validation failed.");
}
}