public static Dictionary <string, string> generateSecureData(Dictionary <string, string> options, Dictionary <string, string> pinData)
{
string pin = "0000";
string cvv = "000";
string expiry = "0000";
Random rand = new Random();
string ttId = rand.Next(999).ToString();
string pan = "0000000000000000";
string amt = "";
string msisdn = "";
string pubMod = publicKeyModulus;
string pubExp = publicKeyExponent;
if (options.ContainsKey("pan"))
{
options.TryGetValue("pan", out pan);
pan = (pan == null || pan.Equals("")) ? "0000000000000000" : pan;
}
if (options.ContainsKey("ttId"))
{
options.TryGetValue("ttId", out ttId);
ttId = (ttId == null || ttId.Equals("")) ? rand.Next(999).ToString() : ttId;
}
if (options.ContainsKey("amount"))
{
options.TryGetValue("amount", out amt);
amt = (amt == null) ? "" : amt;
}
if (options.ContainsKey("mobile"))
{
options.TryGetValue("mobile", out msisdn);
msisdn = (msisdn == null) ? "" : msisdn;
}
if (pinData.ContainsKey("pin"))
{
pinData.TryGetValue("pin", out pin);
pin = (pin == null || pin.Equals("")) ? "0000" : pin;
}
if (pinData.ContainsKey("cvv"))
{
pinData.TryGetValue("cvv", out cvv);
cvv = (cvv == null || cvv.Equals("")) ? "000" : cvv;
}
if (pinData.ContainsKey("expiry"))
{
pinData.TryGetValue("expiry", out expiry);
expiry = (expiry == null || expiry.Equals("")) ? "0000" : expiry;
}
byte[] pinKey = DESUtils.generateKey();
/*
* if(options.ContainsKey("publicKeyModulus"))
* {
* options.TryGetValue("publicKeyModulus", out pubMod);
* pubMod = (pubMod == null || pubMod.Equals("")) ? publicKeyModulus : pubMod;
* }
* if(options.ContainsKey("publicKeyExponent"))
* {
* options.TryGetValue("publicKeyExponent", out pubExp);
* pubExp = (pubExp == null || pubExp.Equals("")) ? publicKeyExponent : pubExp;
* }
*/
string secureData = getGenericSecure(pan, msisdn, ttId, amt, pinKey, pinKey);
string pinBlock = getEncryptedPinCvv2ExpiryDateBlock(pin, cvv, expiry, pinKey);
string macData = getMacCipherText(msisdn, ttId, amt);
string mac = MACUtils.getMacValueUsingHMAC(macData, pinKey);
Dictionary <string, string> secure = new Dictionary <string, string>();
secure.Add("secureData", secureData);
secure.Add("pinBlock", pinBlock);
secure.Add("mac", mac);
return(secure);
}
public static String getGenericSecure(string pan, string msisdn, string ttId, string amt, byte[] pinKey, byte[] macKey)
{
byte[] secureBytes = new byte[64];
byte[] headerBytes = new byte[1];
byte[] formatVersionBytes = new byte[1];
byte[] macVersionBytes = new byte[1];
byte[] pinDesKey = new byte[16];
byte[] macDesKey = new byte[16];
byte[] customerIdBytes = new byte[10];
byte[] macBytes = new byte[4];
byte[] otherHexBytes = new byte[14];
byte[] footerBytes = new byte[1];
headerBytes = AppUtils.hexConverter(Constants.SECURE_HEADER);
formatVersionBytes = AppUtils.hexConverter(Constants.SECURE_FORMAT_VERSION);
macVersionBytes = AppUtils.hexConverter(Constants.SECURE_MAC_VERSION);
pinDesKey = pinKey;
macDesKey = macKey;
footerBytes = AppUtils.hexConverter(Constants.SECURE_FOOTER);
Array.Copy(headerBytes, headerBytes.GetLowerBound(0), secureBytes, 0, 1);
Array.Copy(formatVersionBytes, 0, secureBytes, 1, 1);
Array.Copy(macVersionBytes, 0, secureBytes, 2, 1);
Array.Copy(pinDesKey, 0, secureBytes, 3, 16);
Array.Copy(macDesKey, 0, secureBytes, 19, 16);
string customerIdLen = pan == null ? "" : pan.Length.ToString();
string customerIdLenLen = customerIdLen.Length.ToString();
string customerIdBlock = customerIdLenLen + customerIdLen + pan;
int customerIdBlockLen = customerIdBlock.Length;
int maxLen = 20;
int pandiff = maxLen - customerIdBlockLen;
for (int i = 0; i < pandiff; i++)
{
customerIdBlock = customerIdBlock + "F";
}
customerIdBytes = AppUtils.hexConverter(customerIdBlock);
Array.Copy(customerIdBytes, 0, secureBytes, 35, 10);
string macData = getMacCipherText(msisdn, ttId, amt);
string mac = MACUtils.getMacValueUsingHMAC(macData, pinKey);
mac = mac.Substring(0, 8);
macBytes = AppUtils.hexConverter(mac);
Array.Copy(macBytes, 0, secureBytes, 45, 4);
string otherHex = "0000000000000000000000000000";
otherHexBytes = AppUtils.hexConverter(otherHex);
Array.Copy(otherHexBytes, 0, secureBytes, 49, 14);
Array.Copy(footerBytes, 0, secureBytes, 63, 1);
var sb = new StringBuilder("new byte[] { ");
foreach (var b in secureBytes)
{
sb.Append(b + ", ");
}
sb.Append("}");
Console.WriteLine(sb.ToString());
String encrytedSecure = Encoding.Default.GetString(RSAUtils.rsaEncrypt(publicKeyModulus, publicKeyExponent, secureBytes));
AppUtils.zeroise(secureBytes);
return(encrytedSecure);
}
