/// <summary>
/// Default hexadecimal numeric string formatter with padding in the right side.
/// </summary>
/// <param name="obj">Value to convert.</param>
/// <param name="length">Length for the value as string.</param>
/// <returns>Value of the property as string.</returns>
public static string HexadecimalRightPaddingStringFormatter(HexadecimalData obj, int length)
{
// Validation:
if (obj == null)
{
throw new InvalidOperationException("Can not parse a null value");
}
return(StringFormatter.HexadecimalStringFormatter(obj).PadRight(length, '0'));
}
/// <summary>
/// Default hexadecimal numeric string formatter.
/// </summary>
/// <param name="obj">Value to convert.</param>
/// <returns>Value of the property as string.</returns>
public static string HexadecimalStringFormatter(HexadecimalData obj)
{
// Validation:
if (obj == null)
{
throw new InvalidOperationException("Can not parse a null value");
}
return(obj.DataString);
}
/// <summary>
/// Gets the PinBlock and KeySerialNumber of a card using DUKPT mode
/// </summary>
/// <param name="cryptographyMode">Cryptography Mode</param>
/// <param name="keyIndex">Pinpad Key Index</param>
/// <param name="pan">Card Pan</param>
/// <param name="pinMinLength">Card Pin Minimum length</param>
/// <param name="pinMaxLength">Card Pin Maximum length</param>
/// <param name="message">Pin Entry Message</param>
/// <param name="pinBlock">Retrieved pin block or null on failure</param>
/// <param name="ksn">Retrieved key serial number of null on failure</param>
/// <returns>true on success, false on failure</returns>
public bool GetDukptPin(CryptographyMode cryptographyMode, int keyIndex, string pan, int pinMinLength,
int pinMaxLength, SimpleMessageProperty message, out HexadecimalData pinBlock,
out HexadecimalData ksn)
{
// Creater GPN request:
GpnRequest request = new GpnRequest();
request.GPN_METHOD.Value = new CryptographyMethod(KeyManagementMode.DerivedUniqueKeyPerTransaction,
cryptographyMode);
request.GPN_KEYIDX.Value = keyIndex;
request.GPN_WKENC.Value = new HexadecimalData(new byte[0]);
request.GPN_PAN.Value = pan;
// Settings to capture PIN:
GpnPinEntryRequest entry = new GpnPinEntryRequest();
entry.GPN_MIN.Value = pinMinLength;
entry.GPN_MAX.Value = pinMaxLength;
entry.GPN_MSG.Value = message;
request.GPN_ENTRIES.Value.Add(entry);
// Sends the request and gets it's response:
GpnResponse response = this.Communication.SendRequestAndReceiveResponse <GpnResponse>(request);
// If none response war received:
if (response == null)
{
pinBlock = null;
ksn = null;
return(false);
}
// If a response was received:
else
{
pinBlock = response.GPN_PINBLK.Value;
ksn = response.GPN_KSN.Value;
return(true);
}
}
/// <summary>
/// Debrypt a package.
/// </summary>
/// <param name="value">Package to be decrypted.</param>
/// <returns>Decrypted value.</returns>
private byte[] DecryptTDES(HexadecimalData value)
{
// Null generates a ECB encryption out of CBC.
return(CrossPlatformController.EncryptionController.DecryptTDES(value.Data, StoneTDESKey, null));
}
