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Merge pull request #154 from arekinath/vpcd-pr
Add basic support for connecting to vsmartcard/vpcd
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‎src/main/java/com/licel/jcardsim/remote/VSmartCard.java‎

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/*
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* Copyright 2018 Joyent, Inc
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* Copyright 2020 The University of Queensland
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* Copyright 2013 Licel LLC.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.licel.jcardsim.remote;
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import com.licel.jcardsim.base.CardManager;
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import com.licel.jcardsim.base.Simulator;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.security.InvalidParameterException;
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import java.util.Enumeration;
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import java.util.Properties;
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/**
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* VSmartCard Card Implementation.
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*
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* @author [email protected]
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*/
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public class VSmartCard {
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Simulator sim;
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public VSmartCard(String host, int port) throws IOException {
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VSmartCardTCPProtocol driverProtocol = new VSmartCardTCPProtocol();
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driverProtocol.connect(host, port);
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startThread(driverProtocol);
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}
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static public void main(String args[]) throws Exception {
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if (args.length !=1) {
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System.out.println("Usage: java com.licel.jcardsim.remote.VSmartCard <jcardsim.cfg>");
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System.exit(-1);
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}
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Properties cfg = new Properties();
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// init Simulator
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FileInputStream fis = null;
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try {
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fis = new FileInputStream(args[0]);
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cfg.load(fis);
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} catch (Throwable t) {
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System.err.println("Unable to load configuration " + args[0] + " due to: " + t.getMessage());
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System.exit(-1);
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} finally {
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if (fis != null) {
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fis.close();
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}
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}
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final Enumeration<?> keys = cfg.propertyNames();
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while (keys.hasMoreElements()) {
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String propertyName = (String) keys.nextElement();
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System.setProperty(propertyName, cfg.getProperty(propertyName));
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}
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String propKey = "com.licel.jcardsim.vsmartcard.host";
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String host = System.getProperty(propKey);
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if (host == null) {
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throw new InvalidParameterException("Missing value for property: " + propKey);
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}
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propKey = "com.licel.jcardsim.vsmartcard.port";
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String port = System.getProperty(propKey);
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if (port == null) {
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throw new InvalidParameterException("Missing value for property: " + propKey);
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}
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new VSmartCard(host, Integer.parseInt(port));
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}
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private void startThread(VSmartCardTCPProtocol driverProtocol) throws IOException {
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sim = new Simulator();
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final IOThread ioThread = new IOThread(sim, driverProtocol);
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ShutDownHook hook = new ShutDownHook(ioThread);
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Runtime.getRuntime().addShutdownHook(hook);
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ioThread.start();
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}
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static class ShutDownHook extends Thread {
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IOThread ioThread;
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public ShutDownHook(IOThread ioThread) {
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this.ioThread = ioThread;
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}
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public void run() {
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ioThread.isRunning = false;
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System.out.println("Shutdown connections");
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ioThread.driverProtocol.disconnect();
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}
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}
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static class IOThread extends Thread {
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VSmartCardTCPProtocol driverProtocol;
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Simulator sim;
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boolean isRunning;
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public IOThread(Simulator sim, VSmartCardTCPProtocol driverProtocol) {
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this.sim = sim;
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this.driverProtocol = driverProtocol;
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isRunning = true;
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}
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@Override
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public void run() {
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while (isRunning) {
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try {
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int cmd = driverProtocol.readCommand();
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switch (cmd) {
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case VSmartCardTCPProtocol.POWER_ON:
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case VSmartCardTCPProtocol.RESET:
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sim.reset();
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break;
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case VSmartCardTCPProtocol.GET_ATR:
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driverProtocol.writeData(sim.getATR());
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break;
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case VSmartCardTCPProtocol.APDU:
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final byte[] apdu = driverProtocol.readData();
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final byte[] reply = CardManager.dispatchApdu(sim, apdu);
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driverProtocol.writeData(reply);
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break;
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}
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} catch (Exception e) {}
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}
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}
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}
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}

‎src/main/java/com/licel/jcardsim/remote/VSmartCardTCPProtocol.java‎

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/*
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* Copyright 2018 Joyent, Inc
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* Copyright 2020 The University of Queensland
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* Copyright 2017 Licel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.licel.jcardsim.remote;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.Socket;
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import java.util.concurrent.TimeUnit;
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/**
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* VSmartCard TCP protocol implementation. Used by VSmartCard.
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*
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* @author [email protected]
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*/
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public class VSmartCardTCPProtocol {
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private Socket socket;
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private InputStream dataInput;
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private OutputStream dataOutput;
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private int frameLen = -1;
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public static final int POWER_OFF = 0;
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public static final int POWER_ON = 1;
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public static final int RESET = 2;
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public static final int GET_ATR = 4;
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public static final int APDU = -1;
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public void connect(String host, int port) throws IOException {
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socket = new Socket(host, port);
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try {
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TimeUnit.SECONDS.sleep(3);
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} catch (InterruptedException ignore) {}
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dataInput = socket.getInputStream();
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dataOutput = socket.getOutputStream();
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}
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public void disconnect() {
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closeSocket(socket);
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}
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public int readCommand() throws IOException {
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final byte[] cmdBuf = new byte[3];
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read(cmdBuf, 0, 2, dataInput);
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final int len = ((cmdBuf[0] << 8) & 0xFF00) | (cmdBuf[1] & 0xFF);
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if (len == 1) {
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read(cmdBuf, 2, 1, dataInput);
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final int cmd = cmdBuf[2];
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return (cmd);
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}
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frameLen = len;
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return (APDU);
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}
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public byte[] readData() throws IOException {
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if (frameLen == -1) {
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throw new IOException("No APDU command waiting");
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}
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final byte[] buf = new byte[frameLen];
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read(buf, dataInput);
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frameLen = -1;
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return buf;
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}
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public void writeData(byte[] data) throws IOException {
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final byte[] buf = new byte[2 + data.length];
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buf[0] = (byte)(((data.length & 0xFF00) >> 8) & 0xFF);
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buf[1] = (byte)(data.length & 0xFF);
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System.arraycopy(data, 0, buf, 2, data.length);
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dataOutput.write(buf);
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}
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private void closeSocket(Socket sock) {
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try {
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sock.close();
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} catch (IOException ignored) {}
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}
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private void read(byte[] buf, InputStream stream) throws IOException {
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read(buf, 0, buf.length, stream);
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}
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private void read(byte[] buf, int offset, int len, InputStream stream) throws IOException {
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while (len > 0) {
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final int retval = stream.read(buf, offset, len);
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if (retval < 0) {
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throw new IOException("Got negative number from socket");
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}
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len -= retval;
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offset += retval;
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}
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}
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}

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