diff options
Diffstat (limited to 'src/main/java/org/uic/barcode/Decoder.java')
| -rw-r--r-- | src/main/java/org/uic/barcode/Decoder.java | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/main/java/org/uic/barcode/Decoder.java b/src/main/java/org/uic/barcode/Decoder.java new file mode 100644 index 0000000..fe53ed0 --- /dev/null +++ b/src/main/java/org/uic/barcode/Decoder.java @@ -0,0 +1,232 @@ +package org.uic.barcode;
+
+import java.io.IOException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
+import java.security.SignatureException;
+import java.util.zip.DataFormatException;
+
+import org.uic.barcode.dynamicFrame.Constants;
+import org.uic.barcode.dynamicFrame.DataType;
+import org.uic.barcode.dynamicFrame.DynamicFrame;
+import org.uic.barcode.dynamicFrame.Level1DataType;
+import org.uic.barcode.dynamicFrame.Level2DataType;
+import org.uic.barcode.dynamicFrame.SequenceOfDataType;
+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 DynamicFrame dynamicFrame = null;
+
+ /** The static frame. */
+ private StaticFrame staticFrame = 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, String signingAlg) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException, IllegalArgumentException, UnsupportedOperationException, IOException, EncodingFormatException {
+ if (!isStaticHeader(data)) {
+ return dynamicFrame.validateLevel1(key) ;
+ } else {
+ if (staticFrame.verifyByAlgorithmOid(key,signingAlg)) {
+ return Constants.LEVEL1_VALIDATION_OK;
+ } else {
+ return Constants.LEVEL1_VALIDATION_FRAUD;
+ }
+ }
+ }
+
+ /**
+ * Validate level 2.
+ *
+ * @return the return code indicating errors
+ */
+ public int validateLevel2() {
+ if (!isStaticHeader(data)) {
+ return dynamicFrame.validateLevel2() ;
+ } 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)) {
+
+ dynamicFrame = DynamicFrame.decode(data);
+
+ Level2DataType level2 = dynamicFrame.getLevel2SignedData();
+
+ Level1DataType level1 = level2.getLevel1Data();
+
+ SequenceOfDataType dataList = level1.getData();
+
+ for (DataType level1Content : dataList) {
+
+ uicTicketCoder = new UicRailTicketCoder();
+ if (level1Content.getFormat().equals("FCB1")) {
+ uicTicket = uicTicketCoder.decodeFromAsn(level1Content.getByteData(), 1);
+ } else if (level1Content.getFormat().equals("FCB2")) {
+ uicTicket = uicTicketCoder.decodeFromAsn(level1Content.getByteData(), 2);
+ }
+ }
+
+ } else if (isStaticHeader(data)){
+
+ 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();
+ }
+ }
+ }
+
+
+ /**
+ * 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;
+ }
+
+ /**
+ * 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 DynamicFrame getDynamicHeader() {
+ return dynamicFrame;
+ }
+
+ /**
+ * Sets the dynamic header.
+ *
+ * @param dynamicHeader the new dynamic header
+ */
+ public void setDynamicHeader(DynamicFrame 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 DataType getLevel2Data() {
+ if (!isStaticHeader(data) && dynamicFrame.getLevel2SignedData() != null) {
+ return dynamicFrame.getLevel2SignedData().getLevel2Data();
+ }
+ return null;
+ }
+
+
+
+
+}
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