summaryrefslogtreecommitdiffstats
path: root/src/main/java/org/uic/barcode/Decoder.java
blob: 0878d8d81c19d82f8ee57d73b09fbb2409da5661 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
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
	 * @deprecated
	 */
	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
	 * @deprecated
	 */
	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 
	 * @deprecated
	 */
	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;
	}
	
	
	
}