private static string getSecure(byte[] secureBody, 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[] secureBodyBytes = new byte[28];
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;
secureBodyBytes = secureBody;
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);
Array.Copy(secureBodyBytes, 0, secureBytes, 35, 28);
Array.Copy(footerBytes, 0, secureBytes, 63, 1);
String encrytedSecure = Encoding.Default.GetString(RSAUtils.rsaEncrypt(publicKeyModulus, publicKeyExponent, secureBytes));
AppUtils.zeroise(secureBytes);
return(encrytedSecure);
}
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);
}
