package org.uic.barcode;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.Provider;
import java.security.PublicKey;
import java.security.SignatureException;
import java.util.zip.DataFormatException;
import org.uic.barcode.dynamicContent.api.IUicDynamicContent;
import org.uic.barcode.dynamicFrame.Constants;
import org.uic.barcode.dynamicFrame.api.DynamicFrameCoder;
import org.uic.barcode.dynamicFrame.api.IData;
import org.uic.barcode.dynamicFrame.api.IDynamicFrame;
import org.uic.barcode.dynamicFrame.api.ILevel1Data;
import org.uic.barcode.dynamicFrame.api.ILevel2Data;
import org.uic.barcode.ssbFrame.SsbFrame;
import org.uic.barcode.staticFrame.StaticFrame;
import org.uic.barcode.staticFrame.UFLEXDataRecord;
import org.uic.barcode.staticFrame.UTLAYDataRecord;
import org.uic.barcode.staticFrame.ticketLayoutBarcode.TicketLayout;
import org.uic.barcode.ticket.EncodingFormatException;
import org.uic.barcode.ticket.UicRailTicketCoder;
import org.uic.barcode.ticket.api.spec.IUicRailTicket;
/**
* The Class Decoder.
*
* signature validation and decoding of UIC bar codes
*
*/
public class Decoder {
/** The dynamic frame. */
private IDynamicFrame dynamicFrame = null;
/** The static frame. */
private StaticFrame staticFrame = null;
/** The ssb frame. */
private SsbFrame ssbFrame = null;
/** The uic ticket coder. */
private UicRailTicketCoder uicTicketCoder = null;
/** The uic ticket. */
private IUicRailTicket uicTicket = null;
/** The layout. */
private TicketLayout layout = null;
/** The data. */
byte[] data = null;
/**
* Instantiates a new decoder.
*
* @param data the data
* @throws IOException Signals that an I/O exception has occurred.
* @throws EncodingFormatException the encoding format exception
* @throws DataFormatException the data format exception
*/
public Decoder (byte[] data) throws IOException, EncodingFormatException, DataFormatException {
this.data = data;
decode(data);
}
/**
* Validate level 1.
*
* @param key the public key
* @param signingAlg the signing algorithm OID
* @return the return code indicating errors
* @throws InvalidKeyException the invalid key exception
* @throws NoSuchAlgorithmException the no such algorithm exception
* @throws SignatureException the signature exception
* @throws IllegalArgumentException the illegal argument exception
* @throws UnsupportedOperationException the unsupported operation exception
* @throws IOException Signals that an I/O exception has occurred.
* @throws EncodingFormatException the encoding format exception
*/
public int validateLevel1(PublicKey key) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException, IllegalArgumentException, UnsupportedOperationException, IOException, EncodingFormatException {
if (dynamicFrame != null) {
return dynamicFrame.validateLevel1(key) ;
} else if (staticFrame != null) {
if (staticFrame.verifyByAlgorithmOid(key,null)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
} else if (ssbFrame!= null) {
if (ssbFrame.verifyByAlgorithmOid(key,null, null)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
}
return Constants.LEVEL1_VALIDATION_NO_SIGNATURE;
}
/**
* Validate level 1.
*
* @param key the public key
* @param signingAlg the signing algorithm OID
* @return the return code indicating errors
* @throws InvalidKeyException the invalid key exception
* @throws NoSuchAlgorithmException the no such algorithm exception
* @throws SignatureException the signature exception
* @throws IllegalArgumentException the illegal argument exception
* @throws UnsupportedOperationException the unsupported operation exception
* @throws IOException Signals that an I/O exception has occurred.
* @throws EncodingFormatException the encoding format exception
*/
public int validateLevel1(PublicKey key, String signingAlg) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException, IllegalArgumentException, UnsupportedOperationException, IOException, EncodingFormatException {
if (dynamicFrame != null ) {
return dynamicFrame.validateLevel1(key, signingAlg) ;
} else if (staticFrame != null) {
if (staticFrame.verifyByAlgorithmOid(key,signingAlg)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
} else if (ssbFrame!= null) {
if (ssbFrame.verifyByAlgorithmOid(key,signingAlg, null)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
}
return Constants.LEVEL1_VALIDATION_NO_SIGNATURE;
}
/**
* Validate level 1.
*
* @param key the public key
* @param signingAlg the signing algorithm OID
* @param security provider in case a dedicated provider must be used (otherwise null)
* @return the return code indicating errors
* @throws InvalidKeyException the invalid key exception
* @throws NoSuchAlgorithmException the no such algorithm exception
* @throws SignatureException the signature exception
* @throws IllegalArgumentException the illegal argument exception
* @throws UnsupportedOperationException the unsupported operation exception
* @throws IOException Signals that an I/O exception has occurred.
* @throws EncodingFormatException the encoding format exception
*/
public int validateLevel1(PublicKey key, String signingAlg, Provider provider) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException, IllegalArgumentException, UnsupportedOperationException, IOException, EncodingFormatException {
if (!isStaticHeader(data) && dynamicFrame != null) {
return dynamicFrame.validateLevel1(key, provider) ;
} else if (isSsbFrame(data) && ssbFrame != null) {
if (ssbFrame.verifyByAlgorithmOid(key,signingAlg, provider)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
} else if (staticFrame != null) {
if (staticFrame.verifyByAlgorithmOid(key,signingAlg, provider)) {
return Constants.LEVEL1_VALIDATION_OK;
} else {
return Constants.LEVEL1_VALIDATION_FRAUD;
}
}
return Constants.LEVEL1_VALIDATION_NO_SIGNATURE;
}
/**
* Validate level 2.
*
* @return the return code indicating errors
* @throws EncodingFormatException
*/
public int validateLevel2() throws EncodingFormatException {
if (!isStaticHeader(data) && dynamicFrame != null) {
return dynamicFrame.validateLevel2() ;
} else {
return Constants.LEVEL2_VALIDATION_NO_SIGNATURE;
}
}
/*
* Validate level 2.
* @param prov - provider of the java security implementation in case a dedicated provider must be used
* @return the return code indicating errors
*/
public int validateLevel2(Provider prov) throws EncodingFormatException {
if (!isStaticHeader(data) && dynamicFrame != null) {
return dynamicFrame.validateLevel2(prov) ;
} else {
return Constants.LEVEL2_VALIDATION_NO_SIGNATURE;
}
}
/**
* Decode.
*
* @param data the byte array raw data
* @throws IOException Signals that an I/O exception has occurred.
* @throws EncodingFormatException the encoding format exception
* @throws DataFormatException the data format exception
*/
public void decode(byte[] data) throws IOException, EncodingFormatException, DataFormatException {
if (!isStaticHeader(data)) {
try {
decodeDynamicFrame(data);
} catch (Exception e) {
dynamicFrame = null;
if (isSsbFrame(data)) {
decodeSsbFrame(data);
} else {
throw e;
}
} catch (AssertionError e) {
dynamicFrame = null;
if (isSsbFrame(data)) {
decodeSsbFrame(data);
} else {
throw new EncodingFormatException(e.getMessage());
}
}
} else if (isStaticHeader(data)){
try {
decodeStaticFrame(data);
} catch (Exception e) {
staticFrame = null;
throw e;
}
}
}
private void decodeDynamicFrame(byte[] data) throws EncodingFormatException, IOException {
dynamicFrame = DynamicFrameCoder.decode(data);
ILevel2Data level2 = dynamicFrame.getLevel2Data();
ILevel1Data level1 = level2.getLevel1Data();
for (IData level1Content : level1.getData()) {
uicTicketCoder = new UicRailTicketCoder();
if (level1Content.getFormat().equals("FCB1")) {
uicTicket = uicTicketCoder.decodeFromAsn(level1Content.getData(), 1);
} else if (level1Content.getFormat().equals("FCB2")) {
uicTicket = uicTicketCoder.decodeFromAsn(level1Content.getData(), 2);
} else if (level1Content.getFormat().equals("FCB3")) {
uicTicket = uicTicketCoder.decodeFromAsn(level1Content.getData(), 3);
}
}
}
private void decodeStaticFrame(byte[] data) throws EncodingFormatException, DataFormatException, IOException {
staticFrame = new StaticFrame();
staticFrame.decode(data);
UFLEXDataRecord flex = staticFrame.getuFlex();
if (flex != null) {
uicTicket = flex.getTicket();
}
UTLAYDataRecord tlay = staticFrame.getuTlay();
if (tlay != null) {
layout = tlay.getLayout();
}
}
private void decodeSsbFrame(byte[] data) throws EncodingFormatException, DataFormatException, IOException {
ssbFrame = new SsbFrame();
ssbFrame.decode(data);
}
/**
* Checks if is static header.
*
* @param data the data
* @return true, if is static header
*/
private boolean isStaticHeader(byte[] data) {
byte[] start = "#UT".getBytes();
if (start[0] != data[0] || start[1]!= start[1] || start[2] != data[2]) return false;
return true;
}
/**
* Checks if is ssb frame.
*
* @param data the data
* @return true, if is static header
*/
private boolean isSsbFrame(byte[] data) {
if (data.length == 114) {
return true;
}
return false;
}
/**
* Gets the uic ticket.
*
* @return the uic ticket
*/
public IUicRailTicket getUicTicket() {
return uicTicket;
}
/**
* Gets the layout.
*
* @return the layout
*/
public TicketLayout getLayout() {
return layout;
}
/**
* Gets the dynamic header.
*
* @return the dynamic header
*/
public IDynamicFrame getDynamicFrame() {
return dynamicFrame;
}
/**
* Gets the dynamic content.
*
* @return the dynamic header
*/
public IUicDynamicContent getDynamicContent() {
if (dynamicFrame == null) return null;
return dynamicFrame.getDynamicContent();
}
/**
* Sets the dynamic header.
*
* @param dynamicHeader the new dynamic header
*/
public void setDynamicHeader(IDynamicFrame dynamicHeader) {
this.dynamicFrame = dynamicHeader;
}
/**
* Gets the static frame.
*
* @return the static frame
*/
public StaticFrame getStaticFrame() {
return staticFrame;
}
/**
* Sets the static frame.
*
* @param staticFrame the new static frame
*/
public void setStaticFrame(StaticFrame staticFrame) {
this.staticFrame = staticFrame;
}
public IData getLevel2Data() {
if (!isStaticHeader(data) && dynamicFrame != null && dynamicFrame.getLevel2Data() != null) {
return dynamicFrame.getLevel2Data().getLevel2Data();
}
return null;
}
public byte[] getEncodedLevel1Data() throws IOException, EncodingFormatException {
if (!isStaticHeader(data) && dynamicFrame != null) {
return dynamicFrame.getLevel1DataBin();
} else if (staticFrame != null) {
return staticFrame.getDataForSignature();
} else {
throw new EncodingFormatException("Unknown Header");
}
}
public byte[] getLevel1Signature() throws IOException, EncodingFormatException {
if (!isStaticHeader(data)) {
return dynamicFrame.getLevel2Data().getLevel1Signature();
} else if (staticFrame != null) {
return staticFrame.getDataForSignature();
} else {
throw new EncodingFormatException("Unknown Header");
}
}
public String getLevel1KeyId() throws EncodingFormatException {
if (dynamicFrame != null
&& dynamicFrame.getLevel2Data() != null
&& dynamicFrame.getLevel2Data().getLevel1Data() != null) {
return dynamicFrame.getLevel2Data().getLevel1Data().getKeyId().toString();
} else if (staticFrame != null) {
return staticFrame.getSignatureKey();
} else {
throw new EncodingFormatException("Unknown Header");
}
}
public SsbFrame getSsbFrame() {
return ssbFrame;
}
public void setSsbFrame(SsbFrame ssbFrame) {
this.ssbFrame = ssbFrame;
}
}
