/// <summary>
/// Searches for Stone encryption DUKPT:TDES key, on pinpad index 16.
/// </summary>
/// <returns>GDU response.</returns>
private GduResponse GetGdu()
{
// Creates GDU request:
GduRequest request = new GduRequest();
// Sets GDU to search for Stone encryption index (16):
request.GDU_IDX.Value = (int)StoneIndexCode.EncryptionKey;
// Sets GDU to search for a DUKPT:TDES key:
request.GDU_METHOD.Value = new CryptographyMethod(KeyManagementMode.DerivedUniqueKeyPerTransaction, CryptographyMode.TripleDataEncryptionStandard);
// Sends the request to pinpad, gets and returns it's response:
return(this.communication.SendRequestAndReceiveResponse <GduResponse>(request));
}
// Public Methods
/// <summary>
/// Obtains the current KSN (Key Serial Number) of an index in the table.
/// </summary>
/// <param name="indexToSearch">KSN index.</param>
/// <param name="cryptographyMode">Cryptography method.</param>
/// <returns>The obtained KSN, or null if the KSN was not found.</returns>
public string GetDukptSerialNumber(int indexToSearch, CryptographyMode cryptographyMode)
{
// Setup request:
GduRequest request = new GduRequest();
request.GDU_IDX.Value = indexToSearch;
request.GDU_METHOD.Value = new CryptographyMethod(KeyManagementMode.DerivedUniqueKeyPerTransaction,
cryptographyMode);
// Send request to the pinpad:
GduResponse response = this.communication
.SendRequestAndReceiveResponse <GduResponse>(request);
// Verify if the command was successful:
if (response != null && response.RSP_STAT.Value == AbecsResponseStatus.ST_OK)
{
// Return KSN (if any):
return(response.GDU_KSN.Value);
}
// Failure:
return(null);
}
