188 lines
6.0 KiB
Java
188 lines
6.0 KiB
Java
/*
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* DesfireProtocol.java
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*
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* Copyright (C) 2011 Eric Butler
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*
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* Authors:
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* Eric Butler <eric@codebutler.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.codebutler.farebot.card.desfire;
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import android.nfc.tech.IsoDep;
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import com.codebutler.farebot.Utils;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import org.apache.commons.lang3.ArrayUtils;
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public class DesfireProtocol {
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/* Commands */
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static final byte GET_MANUFACTURING_DATA = (byte) 0x60;
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static final byte GET_APPLICATION_DIRECTORY = (byte) 0x6A;
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static final byte GET_ADDITIONAL_FRAME = (byte) 0xAF;
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static final byte SELECT_APPLICATION = (byte) 0x5A;
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static final byte READ_DATA = (byte) 0xBD;
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static final byte READ_RECORD = (byte) 0xBB;
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static final byte READ_VALUE = (byte) 0x6C;
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static final byte GET_FILES = (byte) 0x6F;
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static final byte GET_FILE_SETTINGS = (byte) 0xF5;
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/* Status codes */
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static final byte OPERATION_OK = (byte) 0x00;
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static final byte PERMISSION_DENIED = (byte) 0x9D;
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static final byte ADDITIONAL_FRAME = (byte) 0xAF;
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private IsoDep mTagTech;
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public DesfireProtocol(IsoDep tagTech) {
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mTagTech = tagTech;
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}
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public DesfireManufacturingData getManufacturingData() throws DesfireException {
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byte[] respBuffer = sendRequest(GET_MANUFACTURING_DATA);
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if (respBuffer.length != 28)
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throw new DesfireException("Invalid response");
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return new DesfireManufacturingData(respBuffer);
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}
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public int[] getAppList() throws DesfireException {
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byte[] appDirBuf = sendRequest(GET_APPLICATION_DIRECTORY);
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int[] appIds = new int[appDirBuf.length / 3];
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for (int app = 0; app < appDirBuf.length; app += 3) {
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byte[] appId = new byte[3];
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System.arraycopy(appDirBuf, app, appId, 0, 3);
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appIds[app / 3] = Utils.byteArrayToInt(appId);
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}
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return appIds;
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}
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public void selectApp (int appId) throws DesfireException {
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byte[] appIdBuff = new byte[3];
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appIdBuff[0] = (byte) ((appId & 0xFF0000) >> 16);
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appIdBuff[1] = (byte) ((appId & 0xFF00) >> 8);
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appIdBuff[2] = (byte) (appId & 0xFF);
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sendRequest(SELECT_APPLICATION, appIdBuff);
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}
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public int[] getFileList() throws DesfireException {
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byte[] buf = sendRequest(GET_FILES);
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int[] fileIds = new int[buf.length];
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for (int x = 0; x < buf.length; x++) {
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fileIds[x] = (int)buf[x];
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}
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return fileIds;
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}
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public DesfireFileSettings getFileSettings (int fileNo) throws DesfireException {
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byte[] data = new byte[0];
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data = sendRequest(GET_FILE_SETTINGS, new byte[] { (byte) fileNo });
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return DesfireFileSettings.Create(data);
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}
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public byte[] readFile (int fileNo) throws DesfireException {
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return sendRequest(READ_DATA, new byte[] {
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(byte) fileNo,
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(byte) 0x0, (byte) 0x0, (byte) 0x0,
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(byte) 0x0, (byte) 0x0, (byte) 0x0
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});
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}
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public byte[] readRecord (int fileNum) throws DesfireException {
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return sendRequest(READ_RECORD, new byte[]{
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(byte) fileNum,
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(byte) 0x0, (byte) 0x0, (byte) 0x0,
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(byte) 0x0, (byte) 0x0, (byte) 0x0
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});
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}
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public int readValue(int fileNum) throws DesfireException {
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byte[] buf = sendRequest(READ_VALUE, new byte[]{
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(byte) fileNum
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});
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ArrayUtils.reverse(buf);
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return Utils.byteArrayToInt(buf);
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}
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private byte[] sendRequest (byte command) throws DesfireException {
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return sendRequest(command, null);
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}
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private byte[] sendRequest (byte command, byte[] parameters) throws DesfireException {
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ByteArrayOutputStream output = new ByteArrayOutputStream();
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byte[] recvBuffer = new byte[0];
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try {
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recvBuffer = mTagTech.transceive(wrapMessage(command, parameters));
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} catch (IOException e) {
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throw new DesfireException(e);
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}
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while (true) {
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if (recvBuffer[recvBuffer.length - 2] != (byte) 0x91)
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throw new DesfireException("Invalid response");
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output.write(recvBuffer, 0, recvBuffer.length - 2);
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byte status = recvBuffer[recvBuffer.length - 1];
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if (status == OPERATION_OK) {
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break;
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} else if (status == ADDITIONAL_FRAME) {
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try {
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recvBuffer = mTagTech.transceive(wrapMessage(GET_ADDITIONAL_FRAME, null));
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} catch (IOException e) {
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throw new DesfireException(e);
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}
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} else if (status == PERMISSION_DENIED) {
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throw new DesfireException("Permission denied");
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} else {
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throw new DesfireException("Unknown status code: " + Integer.toHexString(status & 0xFF));
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}
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}
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return output.toByteArray();
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}
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private byte[] wrapMessage (byte command, byte[] parameters) throws DesfireException {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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stream.write((byte) 0x90);
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stream.write(command);
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stream.write((byte) 0x00);
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stream.write((byte) 0x00);
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if (parameters != null) {
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stream.write((byte) parameters.length);
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try {
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stream.write(parameters);
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} catch (IOException e) {
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throw new DesfireException(e);
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}
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}
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stream.write((byte) 0x00);
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return stream.toByteArray();
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}
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} |