SmartCardConnection (core 2.1.0 API)

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable, YubiKeyConnection
```
public interface SmartCardConnection
extends YubiKeyConnection
```
A connection capable of sending APDUs and receiving their responses.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Transport`	`getTransport()`	Checks what transport the connection is using (USB or NFC).
`boolean`	`isExtendedLengthApduSupported()`	Standard APDUs have a 1-byte length field, allowing a maximum of 255 payload bytes, which results in a maximum APDU length of 261 bytes.
`byte[]`	`sendAndReceive(byte[] apdu)`	Sends a command APDU to the YubiKey, and reads a response.

Methods inherited from interface java.io.Closeable
close

- Method Detail
  - sendAndReceive
```
byte[] sendAndReceive(byte[] apdu)
               throws java.io.IOException
```
    Sends a command APDU to the YubiKey, and reads a response.
    
    Parameters:
    
    apdu - The binary APDU data to be sent.
    
    Returns:
    
    The response back from the YubiKey.
    
    Throws:
    
    java.io.IOException - in case of communication error
  - getTransport
```
Transport getTransport()
```
    Checks what transport the connection is using (USB or NFC).
    
    Returns:
    
    the physical transport used for the connection.
  - isExtendedLengthApduSupported
```
boolean isExtendedLengthApduSupported()
```
    Standard APDUs have a 1-byte length field, allowing a maximum of 255 payload bytes, which results in a maximum APDU length of 261 bytes. Extended length APDUs have a 3-byte length field, allowing 65535 payload bytes.
    
    Returns:
    
    true if this connection object supports Extended length APDUs.