com.cloudpos.card

Interface SLE4442Card

All Superinterfaces:

Card, MemoryCard

public interface SLE4442Card
extends MemoryCard

The SLE4442Card interface for handling SLE4442 smart cards, which combine functionalities of both smart cards and memory cards. This interface provides methods to connect to and disconnect from the card, authenticate, and perform read/write operations in different areas of the card's memory. It is used in applications that require secure data transactions and storage, such as payment systems and access control.

Field Summary

Fields

Modifier and Type	Field and Description
static int	MEMORY_CARD_AREA_MAIN Main data storage area of the memory card.
static int	MEMORY_CARD_AREA_PROTECTED Manufacturer-defined protected area of the memory card.
static int	MEMORY_CARD_AREA_SECURITY Security data storage area of the memory card.

Fields inherited from interface com.cloudpos.card.Card

PROTOCOL_RFCARD_TYPE_A, PROTOCOL_RFCARD_TYPE_B, PROTOCOL_T_0, PROTOCOL_T_1, PROTOCOL_UNKNOWN, STATUS_ABSENT, STATUS_CONNECTED, STATUS_DISCONNECTED

Method Summary

Modifier and Type	Method and Description
ATR	connect() Powers up and performs a cold reset on the smart card reader slot.
void	disconnect() Powers down the smart card reader slot.
byte[]	read(int area, int address, int length) Reads data from a specified area of the card.
boolean	verify(byte[] key) Authenticates the card using the provided key.
void	write(int area, int address, byte[] data) Writes data to a specified area of the card.

Methods inherited from interface com.cloudpos.card.Card

getCardStatus, getID, getIDInfo, getProtocol

Field Detail

MEMORY_CARD_AREA_MAIN

static final int MEMORY_CARD_AREA_MAIN

Main data storage area of the memory card.

See Also:

Constant Field Values

MEMORY_CARD_AREA_PROTECTED

static final int MEMORY_CARD_AREA_PROTECTED

Manufacturer-defined protected area of the memory card.

See Also:

Constant Field Values

MEMORY_CARD_AREA_SECURITY

static final int MEMORY_CARD_AREA_SECURITY

Security data storage area of the memory card.

See Also:

Constant Field Values

Method Detail

connect

ATR connect()
     throws DeviceException

Powers up and performs a cold reset on the smart card reader slot.

This method resets the card, causing it to transmit an Answer to Reset (ATR) if the slot power is off.

Returns:

The Answer to Reset (ATR) from the card.

Throws:

DeviceException - for standard device-related errors as documented in DeviceException.

disconnect

void disconnect()
         throws DeviceException

Powers down the smart card reader slot.

This method safely disconnects from the card, ensuring proper termination of any ongoing communication.

Throws:

DeviceException - for standard device-related errors as documented in DeviceException.

verify

boolean verify(byte[] key)
        throws DeviceException

Authenticates the card using the provided key.

Parameters:

key - The byte array containing the authentication key.

Returns:

true if authentication succeeds, false otherwise.

Throws:

DeviceException - for standard device-related errors as documented in DeviceException.

read

byte[] read(int area,
            int address,
            int length)
     throws DeviceException

Reads data from a specified area of the card.

The area parameter determines where the read operation occurs, and can be one of the following:

MEMORY_CARD_AREA_MAIN - Main data area.

MEMORY_CARD_AREA_PROTECTED - Protected area set by the manufacturer.

MEMORY_CARD_AREA_SECURITY - Security data area.

Parameters:

area - The memory area to read from, as defined in the constants.

address - The starting address for the read operation (from 0).

length - The length of the data to read.

Returns:

The data read from the specified area.

Throws:

DeviceException - for standard device-related errors as documented in DeviceException.

write

void write(int area,
           int address,
           byte[] data)
    throws DeviceException

Writes data to a specified area of the card.

The area parameter determines where the write operation occurs, and can be one of the following:

MEMORY_CARD_AREA_MAIN - Main data area.

MEMORY_CARD_AREA_PROTECTED - Protected area set by the manufacturer.

MEMORY_CARD_AREA_SECURITY - Security data area.

Parameters:

area - The memory area to write to, as defined in the constants.

address - The starting address for the write operation (from 0).

data - The data to be written.

Throws:

DeviceException - for standard device-related errors as documented in DeviceException.