com.licel.jcardsim.utils

Class ByteUtil

java.lang.Object

com.licel.jcardsim.utils.ByteUtil

public final class ByteUtil
extends Object

Utility methods for dealing with byte arrays.

Method Summary

Modifier and Type	Method and Description
static byte[]	byteArray(String hexString) Create byte array from hex string
static short	getShort(byte[] bArray, int offset) Read short from array
static short	getSW(byte[] apduBuffer) Extract status word from APDU
static String	hexString(byte[] bytes) Convert byte array into hex string
static String	hexString(byte[] bytes, int offset, int length) Convert byte array into hex string
static void	requireSW(byte[] apduBuffer, int expected) Check status word from APDU
static void	requireSW(byte[] apduBuffer, short expected) Check status word from APDU

Methods inherited from class java.lang.Object

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

Method Detail

byteArray

public static byte[] byteArray(String hexString)

Create byte array from hex string

Parameters:

hexString - hex string

Returns:

new byte array

Throws:

NullPointerException - if hexString is null

hexString

public static String hexString(byte[] bytes)

Convert byte array into hex string

Parameters:

bytes - hex string

Returns:

hexString

Throws:

NullPointerException - if bytes is null

hexString

public static String hexString(byte[] bytes,
                               int offset,
                               int length)

Convert byte array into hex string

Parameters:

bytes - hex string

offset - offset

length - length

Returns:

hexString

Throws:

NullPointerException - if bytes is null

getSW

public static short getSW(byte[] apduBuffer)

Extract status word from APDU

Parameters:

apduBuffer - APDU bytes

Returns:

status word

Throws:

NullPointerException - if apduBuffer is null

IllegalArgumentException - if apduBuffer.length is < 2

requireSW

public static void requireSW(byte[] apduBuffer,
                             int expected)

Check status word from APDU

Parameters:

apduBuffer - APDU bytes

expected - expected status word

Throws:

NullPointerException - if apduBuffer is null

IllegalArgumentException - if apduBuffer.length is < 2

AssertionError - if expected does not match the status word from apduBuffer

requireSW

public static void requireSW(byte[] apduBuffer,
                             short expected)

Check status word from APDU

Parameters:

apduBuffer - APDU bytes

expected - expected status word

Throws:

NullPointerException - if apduBuffer is null

IllegalArgumentException - if apduBuffer.length is < 2

AssertionError - if expected does not match the status word from apduBuffer

getShort

public static short getShort(byte[] bArray,
                             int offset)

Read short from array

Parameters:

bArray - byte array

offset - offset

Returns:

short value

See Also:

Util.getShort(byte[], short)