README

smartcard-interface

A simple package for sending commands into smartcards.

Note: This simply wraps the smartcard package on mac/linux and pcsc on windows.

Installation

$ npm install smartcard-interface

Usage

const { DeviceManager } = require("smartcard-interface");

let devices = new DeviceManager();

// Called when a device is inserted.
devices.on("activate", (e) => {
    let device = e.device;

    console.log("Device activated", device.name);

    device.on("insert", async (e) => {
        let card = e.card;

        console.log("Card inserted", card.getAtr());

        card.connect();

        // Select an applet.
        let selectResponse = await card.sendCommand(Buffer.from([
            0x00,
            0xA4,
            0x04,
            0x00,
            0x09,
            ...Buffer.from("000000000000000000", "hex") // AID
        ]));

        console.log(selectResponse);

        // Send a command into the applet.
        let pubKey = await card.sendCommand(Buffer.from([
            0x00, // CLA
            0x32, // INS
            0x00, // P1
            0x00, // P2
            0x20  // LE
        ]));

        console.log(pubKey);

        card.close();
    });

    device.on("removed", (e) => {
        let card = e.card;

        console.log("Card removed", card.getAtr());
    });
});

Documentation

Classes

Card: Container for cards
Device: Container for card readers

Card

Container for cards

Kind: global class
Properties

Name	Type	Description
card	`smartcard.Card`	The card to wrap
device	`Device`	Parent device

Card
- new Card()
- .getAtr() ⇒ string
- .connect()
- .close()
- .sendCommand(APDUBuffer) ⇒ Promise.<Device>

new Card()

Wraps a smartcard.Card

card.getAtr() ⇒ `string`

Returns the card atr.

Kind: instance method of Card
Returns: string - card atr

card.connect()

Connects to the card. Do this before sending commands.

Kind: instance method of Card

card.close()

Closes the current connection.

Kind: instance method of Card

card.sendCommand(APDUBuffer) ⇒ `Promise.<Device>`

Executes the APDUBuffer on the card.

Kind: instance method of Card
Returns: Promise.<Device> - Output APDU

Param	Type	Description
APDUBuffer	`Buffer`	Buffer of bytes

Example

let aid = [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00];

card.connect(); // You need to connect in order to issue commands.

// Selects the aid above.
let response = await card.sendCommand(Buffer.from([
        [0x00, 0xA4, 0x04, 0x00, 0x00, 0x09, ...aid]
]));

console.log("Response", response); // Buffer < 90 00 >

card.close(); // Don't forget to close the connection when you're done.

Device

Container for card readers

Kind: global class
Properties

Name	Type	Description
name	`string`	Device name.
index	`number`	Device index.

Device

new Device(device, index)

Wraps a smartcard.Device

Param	Type	Description
device	`smartcard.Device`	The device to wrap
index	`number`	Raw device index usually `0`

"insert"

Fired when a card is inserted into the reader.

Kind: event emitted by Device
Properties

Name	Type	Description
card	`Card`	The card that was inserted.

"remove"

Fired when a card is removed from the reader.