Class ApduResponse

java.lang.Object
com.codename1.nfc.ApduResponse
public final class ApduResponse extends Object
Helpers for working with the ISO 7816 status word (SW1/SW2) trailer at the end of every APDU response. Pair with IsoDep (reader mode) and HostCardEmulationService (card mode).

  • Method Summary

    Modifier and Type
    Method
    Description
    static byte[]
    body(byte[] apdu)
    Slice helper -- returns the payload preceding the 2-byte SW trailer, or an empty array when the response is exactly 2 bytes.
    static boolean
    isSuccess(byte[] apdu)
    true when the trailing two bytes of apdu are 90 00.
    static int
    statusWord(byte[] apdu)
    16-bit status word from the last two bytes of apdu.
    static byte[]
    sw(int sw1, int sw2)
    Returns a 2-byte status-word array for the given SW1/SW2 pair.
    static byte[]
    swClaNotSupported()
    SW = 6E 00 -- CLA not supported.
    static byte[]
    swFileNotFound()
    SW = 6A 82 -- file or AID not found.
    static byte[]
    swInsNotSupported()
    SW = 6D 00 -- INS not supported.
    static byte[]
    swSecurityNotSatisfied()
    SW = 69 82 -- security condition not satisfied.
    static byte[]
    swSuccess()
    SW = 90 00 -- command succeeded.
    static byte[]
    swUnknownError()
    SW = 6F 00 -- unknown / generic failure.
    static byte[]
    swWrongLength()
    SW = 67 00 -- wrong length / Lc.
    static byte[]
    withStatus(byte[] body, byte[] sw)
    Appends sw to the end of body and returns the combined APDU response.

    Methods inherited from class Object

    clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • swSuccess

      public static byte[] swSuccess()
      SW = 90 00 -- command succeeded.

    • swFileNotFound

      public static byte[] swFileNotFound()
      SW = 6A 82 -- file or AID not found. Returned from an HCE service's SELECT when the requested AID is not the one it registered.

    • swInsNotSupported

      public static byte[] swInsNotSupported()
      SW = 6D 00 -- INS not supported. Returned from an HCE service for any APDU whose instruction byte is not handled.

    • swClaNotSupported

      public static byte[] swClaNotSupported()
      SW = 6E 00 -- CLA not supported.

    • swWrongLength

      public static byte[] swWrongLength()
      SW = 67 00 -- wrong length / Lc.

    • swSecurityNotSatisfied

      public static byte[] swSecurityNotSatisfied()
      SW = 69 82 -- security condition not satisfied.

    • swUnknownError

      public static byte[] swUnknownError()
      SW = 6F 00 -- unknown / generic failure.

    • isSuccess

      public static boolean isSuccess(byte[] apdu)
      true when the trailing two bytes of apdu are 90 00.

    • body

      public static byte[] body(byte[] apdu)
      Slice helper -- returns the payload preceding the 2-byte SW trailer, or an empty array when the response is exactly 2 bytes.

    • statusWord

      public static int statusWord(byte[] apdu)
      16-bit status word from the last two bytes of apdu. Returns 0 for inputs shorter than 2 bytes.

    • sw

      public static byte[] sw(int sw1, int sw2)
      Returns a 2-byte status-word array for the given SW1/SW2 pair.

    • withStatus

      public static byte[] withStatus(byte[] body, byte[] sw)
      Appends sw to the end of body and returns the combined APDU response. Helper for HostCardEmulationService implementations.