/// <summary>
/// Sends an APDU to the device connected to the underlying driver.
/// </summary>
/// <param name="apdu">APDU to send to the device</param>
/// <returns>Returns an <see cref="APDUResponse"/> containing response status code and any data.</returns>
/// <exception cref="ArgumentNullException">Thrown when <paramref name="apdu"/> is null.</exception>
/// <exception cref="UnexpectedResponseException">Thrown on a non-success status code.</exception>
public APDUResponse SendAPDU(APDU apdu)
{
// Send APDU and parse response
APDUResponse res = Driver.SendAPDU(apdu, null);
// Read remaining data
while (res.SW1 == (byte)APDUResponse.StatusWord.MORE_DATA_AVAILABLE)
{
APDUResponse _res = Driver.SendAPDU(new APDU
{
CLA = 0x00,
INS = (APDU.Instruction)Instruction.SEND_REMAINING,
P1 = 0x00,
P2 = 0x00
}, null);
// Extend res.Data with remaining data
int offset = res.Data.Length;
Array.Resize(ref res.Data, offset + _res.Data.Length);
Buffer.BlockCopy(_res.Data, 0, res.Data, offset, _res.Data.Length);
// Overwrite status words
res.SW = _res.SW;
}
// Validate final status
if (res.SW != APDUResponse.StatusWord.SUCCESS)
{
throw new UnexpectedResponseException("Unexpected response from device.", res.SW);
}
// Return full response
return(res);
}
/// <summary>
/// Transmits an <see cref="APDU"/> to the device and receives an <see cref="APDUResponse"/> back from it.
/// </summary>
/// <param name="apdu">APDU to send to the device</param>
/// <param name="check">Status code to check for</param>
/// <returns>Returns the parsed <see cref="APDUResponse"/> from the device response.</returns>
/// <exception cref="UnexpectedResponseException">Thrown if write is unsuccessful or device returns a status code not matching <paramref name="check"/>.</exception>
public APDUResponse SendAPDU(APDU apdu, APDUResponse.StatusWord?check = APDUResponse.StatusWord.SUCCESS)
{
if (apdu == null)
{
throw new ArgumentNullException();
}
byte[] buffer = new byte[256];
SCardError writeres = Reader.Transmit(apdu.ToBytes(), ref buffer);
if (writeres != SCardError.Success)
{
throw new UnexpectedResponseException("Device returned a non-success status code.");
}
APDUResponse res = new APDUResponse(buffer);
if (check != null && check != res.SW)
{
throw new UnexpectedResponseException("Unexpected response from device.");
}
return(res);
}
