1 /**
  2  *  ---------
  3  * |.##> <##.|  Open Smart Card Development Platform (www.openscdp.org)
  4  * |#       #|
  5  * |#       #|  Copyright (c) 1999-2018 CardContact Software & System Consulting
  6  * |'##> <##'|  Andreas Schwier, 32429 Minden, Germany (www.cardcontact.de)
  7  *  ---------
  8  *
  9  *  This file is part of OpenSCDP.
 10  *
 11  *  OpenSCDP is free software; you can redistribute it and/or modify
 12  *  it under the terms of the GNU General Public License version 2 as
 13  *  published by the Free Software Foundation.
 14  *
 15  *  OpenSCDP is distributed in the hope that it will be useful,
 16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  *  GNU General Public License for more details.
 19  *
 20  *  You should have received a copy of the GNU General Public License
 21  *  along with OpenSCDP; if not, write to the Free Software
 22  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 23  *
 24  * @fileoverview Implementation of ISO 7816-4 APDU processing
 25  */
 26 
 27 
 28 
 29 /**
 30  * Create an APDU
 31  *
 32  * <p>This constructor supports the signatures</p>
 33  * <ul>
 34  *  <li>APDU(ByteString command)</li>
 35  *  <li>APDU(Number cla, Number ins, Number p1, Number p2)</li>
 36  *  <li>APDU(Number cla, Number ins, Number p1, Number p2, data)</li>
 37  *  <li>APDU(Number cla, Number ins, Number p1, Number p2, data, Ne)</li>
 38  * </ul>
 39  * @class Class implementing support for command and response APDUs
 40  * @constructor
 41  * @param {ByteString} command the command APDU
 42  * @param {Number} cla the class byte
 43  * @param {Number} ins the instruction byte
 44  * @param {Number} p1 the first parameter
 45  * @param {Number} p2 the second parameter
 46  * @param {ByteString} data the data field (optional)
 47  * @param {Number} Ne the number of expected bytes (optional)
 48  */
 49 function APDU() {
 50 	if (arguments.length > 0) {
 51 		var arg = arguments[0];
 52 		if (arg instanceof ByteString) {
 53 			if (arguments.length != 1) {
 54 				throw new GPError("APDU", GPError.INVALID_ARGUMENTS, APDU.SW_GENERALERROR, "Only one argument of type ByteString expected");
 55 			}
 56 			this.fromByteString(arg);
 57 		} else {
 58 			if ((arguments.length < 4) || (arguments.length > 6)) {
 59 				throw new GPError("APDU", GPError.INVALID_ARGUMENTS, APDU.SW_GENERALERROR, "4 to 6 arguments expected");
 60 			}
 61 
 62 			for (var i = 0; i < 4; i++) {
 63 				if (typeof(arguments[i]) != "number") {
 64 					throw new GPError("APDU", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Argument must be of type Number");
 65 				}
 66 			}
 67 			this.cla = arguments[0];
 68 			this.ins = arguments[1];
 69 			this.p1 = arguments[2];
 70 			this.p2 = arguments[3];
 71 
 72 			var i = 4;
 73 			if (arguments.length > i) {
 74 				if (arguments[i] instanceof ByteString) {
 75 					this.cdata = arguments[i];
 76 					i++;
 77 				}
 78 			}
 79 
 80 			if (arguments.length > i) {
 81 				if (typeof(arguments[i]) != "number") {
 82 					throw new GPError("APDU", GPError.INVALID_TYPE, APDU.SW_GENERALERROR, "Argument must be of type Number");
 83 				}
 84 				this.ne = arguments[i];
 85 			}
 86 		}
 87 	}
 88 	this.rapdu = null;
 89 	this.SW = APDU.SW_GENERALERROR;
 90 }
 91 
 92 exports.APDU = APDU;
 93 
 94 
 95 
 96 APDU.INS_DEACTIVATE		= 0x04;
 97 APDU.INS_VERIFY			= 0x20;
 98 APDU.INS_MANAGE_SE		= 0x22;
 99 APDU.INS_CHANGE_REFERENCE_DATA	= 0x24;
100 APDU.INS_PSO			= 0x2A;
101 APDU.INS_RESET_RETRY_COUNTER	= 0x2C;
102 APDU.INS_ACTIVATE		= 0x44;
103 APDU.INS_GENERATE_KEY_PAIR	= 0x46;
104 APDU.INS_INITIALIZE_UPDATE	= 0x50;
105 APDU.INS_EXTERNAL_AUTHENTICATE	= 0x82;
106 APDU.INS_GET_CHALLENGE		= 0x84;
107 APDU.INS_GENERAL_AUTHENTICATE	= 0x86;
108 APDU.INS_COMPUTE_DIGITAL_SIGN	= 0x9E;
109 APDU.INS_SELECT			= 0xA4;
110 APDU.INS_READBINARY		= 0xB0;
111 APDU.INS_READ_BINARY		= 0xB0;
112 APDU.INS_READ_RECORD		= 0xB2;
113 APDU.INS_VERIFY_CERTIFICATE	= 0xBE;
114 APDU.INS_GET_RESPONSE		= 0xC0;
115 APDU.INS_GET_DATA		= 0xCA;
116 APDU.INS_UPDATE_BINARY		= 0xD6;
117 APDU.INS_PUT_KEY		= 0xD8;
118 APDU.INS_PUT_DATA		= 0xDA;
119 APDU.INS_DELETE			= 0xE4;
120 APDU.INS_TERMINATE		= 0xE6;
121 APDU.INS_SET_STATUS		= 0xF0;
122 
123 APDU.SW_OK                 = 0x9000;      	/* Process completed                 */
124 
125 APDU.SW_TIMEOUT            = 0x6401;      	/* Exec error: Command timeout       */
126 
127 APDU.SW_OKMOREDATA         = 0x6100;      	/*-Process completed, more data available*/
128 APDU.SW_WARNING            = 0x6200;      	/*-Warning: NV-Ram not changed       */
129 APDU.SW_WARNING1           = 0x6201;      	/*-Warning: NV-Ram not changed 1     */
130 APDU.SW_DATAINV            = 0x6281;      	/*-Warning: Part of data corrupted   */
131 APDU.SW_EOF                = 0x6282;      	/*-Warning: End of file reached      */
132 APDU.SW_INVFILE            = 0x6283;      	/* Warning: Invalidated file         */
133 APDU.SW_INVFORMAT          = 0x6284;      	/* Warning: Invalid file control     */
134 APDU.SW_WARNINGNVCHG       = 0x6300;      	/*-Warning: NV-Ram changed           */
135 APDU.SW_WARNINGCOUNT       = 0x63C0;      	/*-Warning: Warning with counter     */
136 APDU.SW_WARNING0LEFT       = 0x63C0;      	/*-Warning: Verify fail, no try left */
137 APDU.SW_WARNING1LEFT       = 0x63C1;      	/*-Warning: Verify fail, 1 try left  */
138 APDU.SW_WARNING2LEFT       = 0x63C2;      	/*-Warning: Verify fail, 2 tries left*/
139 APDU.SW_WARNING3LEFT       = 0x63C3;      	/*-Warning: Verify fail, 3 tries left*/
140 APDU.SW_EXECERR            = 0x6400;      	/*-Exec error: NV-Ram not changed    */
141 APDU.SW_MEMERR             = 0x6501;      	/*-Exec error: Memory failure        */
142 APDU.SW_MEMERRWRITE        = 0x6581;      	/*-Exec error: Memory failure        */
143 APDU.SW_WRONGLENGTH        = 0x6700;      	/*-Checking error: Wrong length      */
144 
145 APDU.SW_CLANOTSUPPORTED    = 0x6800;      	/*-Checking error: Function in CLA byte not supported */
146 APDU.SW_LCNOTSUPPORTED     = 0x6881;      	/*-Checking error: Logical channel not supported */
147 APDU.SW_SMNOTSUPPORTED     = 0x6882;      	/*-Checking error: Secure Messaging not supported */
148 APDU.SW_LASTCMDEXPECTED    = 0x6883;      	/*-Checking error: Last command of the chain expected */
149 APDU.SW_CHAINNOTSUPPORTED  = 0x6884;      	/*-Checking error: Command chaining not supported */
150 
151 APDU.SW_COMNOTALLOWED      = 0x6900;      	/*-Checking error: Command not allowed */
152 APDU.SW_COMINCOMPATIBLE    = 0x6981;      	/*-Checking error: Command incompatible with file structure */
153 APDU.SW_SECSTATNOTSAT      = 0x6982;      	/*-Checking error: Security condition not satisfied */
154 APDU.SW_AUTHMETHLOCKED     = 0x6983;      	/*-Checking error: Authentication method locked */
155 APDU.SW_REFDATANOTUSABLE   = 0x6984;      	/*-Checking error: Reference data not usable */
156 APDU.SW_CONDOFUSENOTSAT    = 0x6985;      	/*-Checking error: Condition of use not satisfied */
157 APDU.SW_COMNOTALLOWNOEF    = 0x6986;      	/*-Checking error: Command not allowed (no current EF) */
158 APDU.SW_SMOBJMISSING       = 0x6987;      	/*-Checking error: Expected secure messaging object missing */
159 APDU.SW_INCSMDATAOBJECT    = 0x6988;      	/*-Checking error: Incorrect secure messaging data object */
160 
161 APDU.SW_INVPARA            = 0x6A00;      	/*-Checking error: Wrong parameter P1-P2 */
162 APDU.SW_INVDATA            = 0x6A80;      	/*-Checking error: Incorrect parameter in the command data field*/
163 APDU.SW_FUNCNOTSUPPORTED   = 0x6A81;      	/*-Checking error: Function not supported */
164 APDU.SW_NOAPPL             = 0x6A82;      	/*-Checking error: File not found    */
165 APDU.SW_FILENOTFOUND       = 0x6A82;      	/*-Checking error: File not found    */
166 APDU.SW_RECORDNOTFOUND     = 0x6A83;      	/*-Checking error: Record not found    */
167 APDU.SW_OUTOFMEMORY        = 0x6A84;      	/*-Checking error: Not enough memory space in the file   */
168 APDU.SW_INVLCTLV           = 0x6A85;      	/*-Checking error: Nc inconsistent with TLV structure */
169 APDU.SW_INVACC             = 0x6A85;      	/*-Checking error: Access cond. n/f  */
170 APDU.SW_INCP1P2            = 0x6A86;      	/*-Checking error: Incorrect P1-P2   */
171 APDU.SW_INVLC              = 0x6A87;      	/*-Checking error: Lc inconsistent with P1-P2 */
172 APDU.SW_RDNOTFOUND         = 0x6A88;      	/*-Checking error: Reference data not found*/
173 APDU.SW_FILEEXISTS         = 0x6A89;      	/*-Checking error: File already exists */
174 APDU.SW_DFNAMEEXISTS       = 0x6A8A;      	/*-Checking error: DF name already exists */
175 
176 APDU.SW_INVP1P2            = 0x6B00;      	/*-Checking error: Wrong parameter P1-P2 */
177 APDU.SW_INVLE              = 0x6C00;      	/*-Checking error: Invalid Le        */
178 APDU.SW_INVINS             = 0x6D00;      	/*-Checking error: Wrong instruction */
179 APDU.SW_INVCLA             = 0x6E00;      	/*-Checking error: Class not supported */
180 APDU.SW_ACNOTSATISFIED     = 0x9804;      	/* Access conditions not satisfied   */
181 APDU.SW_NOMORESTORAGE      = 0x9210;      	/* No more storage available         */
182 APDU.SW_GENERALERROR       = 0x6F00;      	/*-Checking error: No precise diagnosis */
183 
184 
185 /**
186  * Create an APDU object from the encoded form (Called internally)
187  *
188  * @param {ByteString} bs
189  */
190 APDU.prototype.fromByteString = function(bs) {
191 	if (bs.length < 4) {
192 		throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_GENERALERROR, "Command APDU must be at least 4 bytes long");
193 	}
194 	this.cla = bs.byteAt(0);
195 	this.ins = bs.byteAt(1);
196 	this.p1 = bs.byteAt(2);
197 	this.p2 = bs.byteAt(3);
198 
199 	if (bs.length > 4) {
200 		var extended = false;
201 
202 		var i = 4;
203 		var l = bs.length - i;
204 		var n = bs.byteAt(i++);
205 		l--;
206 
207 		if ((n == 0) && (l > 0)) {
208 			extended = true;
209 			if (l < 2) {
210 				throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Extended length APDU too short");
211 			}
212 			n = (bs.byteAt(i) << 8) + bs.byteAt(i + 1);
213 			i += 2;
214 			l -= 2;
215 		}
216 
217 		if (l > 0) {	// Case 3s / Case 3e / Case 4s / Case 4e
218 			if (l < n) {
219 				throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Invalid Lc in APDU");
220 			}
221 			this.cdata = bs.bytes(i, n);
222 			i += n;
223 			l -= n;
224 
225 			if (l > 0) {	// Case 4s / Case 4e
226 				n = bs.byteAt(i++);
227 				l--;
228 				if (extended) {
229 					if (l < 1) {
230 						throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Invalid Le in extended APDU");
231 					}
232 					n = (n << 8) + bs.byteAt(i++);
233 					l--;
234 				}
235 				this.ne = (extended && (n == 0) ? 65536 : n);
236 			}
237 		} else {
238 			this.ne = (extended && (n == 0) ? 65536 : n);
239 		}
240 
241 		if (l > 0) {
242 			throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Too many bytes in APDU");
243 		}
244 	}
245 }
246 
247 
248 
249 /**
250  * Get encoded command APDU
251  *
252  * @type ByteString
253  * @return the encoded command APDU
254  */
255 APDU.prototype.getCommandAPDU = function() {
256 	var bb = new ByteBuffer();
257 
258 	bb.append(this.cla);
259 	bb.append(this.ins);
260 	bb.append(this.p1);
261 	bb.append(this.p2);
262 
263 	var hasCData = (typeof(this.cdata) != "undefined");
264 	var hasNe = (typeof(this.ne) != "undefined");
265 
266 	var extended = ((hasCData && this.cdata.length > 255) ||
267 					(hasNe && this.ne > 256));
268 
269 	if (extended) {
270 		bb.append(0);
271 	}
272 
273 	if (hasCData && this.cdata.length > 0) {
274 		if (extended) {
275 			bb.append(this.cdata.length >> 8);
276 		}
277 		bb.append(this.cdata.length & 0xFF);
278 		bb.append(this.cdata);
279 	}
280 
281 	if (hasNe) {
282 		if (extended) {
283 			bb.append(this.ne >> 8);
284 		}
285 		bb.append(this.ne & 0xFF);
286 	}
287 
288 	return bb.toByteString();
289 }
290 
291 
292 
293 /**
294  * Get encoded response APDU
295  *
296  * @type ByteString
297  * @return the encoded response APDU
298  */
299 APDU.prototype.getResponseAPDU = function() {
300 	var bb = new ByteBuffer();
301 
302 	if (this.rdata) {
303 		bb.append(this.rdata);
304 	}
305 
306 	bb.append(this.SW >> 8);
307 	bb.append(this.SW & 0xFF);
308 
309 	return bb.toByteString();
310 }
311 
312 
313 
314 /**
315  * Gets the class byte
316  *
317  * @type Number
318  * @return the class byte
319  */
320 APDU.prototype.getCLA = function() {
321 	return this.cla;
322 }
323 
324 
325 
326 /**
327  * Sets the class byte, e.g. after a transformation
328  *
329  * @parameter {Number} the new CLA byte
330  */
331 APDU.prototype.setCLA = function(cla) {
332 	this.cla = cla;
333 }
334 
335 
336 
337 /**
338  * Test if command is an ISO command
339  *
340  * @type boolean
341  * @return true if command has ISO class byte
342  */
343 APDU.prototype.isISO = function() {
344 	return (this.cla & 0x80) == 0x00;
345 }
346 
347 
348 
349 /**
350  * Test if command uses extended length
351  *
352  * @type boolean
353  * @return true if APDU uses extended length
354  */
355 APDU.prototype.isExtendedLength = function() {
356 	return ((this.hasCData() && this.cdata.length > 255) || (this.hasLe() && (this.ne > 256)));
357 }
358 
359 
360 
361 /**
362  * Test if command chaining is indicated
363  *
364  * @type boolean
365  * @return true if chaining bit is set
366  */
367 APDU.prototype.isChained = function() {
368 	return (this.cla & 0x10) == 0x10;
369 }
370 
371 
372 
373 /**
374  * Test if command is send using secure messaging
375  *
376  * @type boolean
377  * @return true if secure messaging is indicated in CLA byte
378  */
379 APDU.prototype.isSecureMessaging = function() {
380 	return (this.cla & 0x08) == 0x08;
381 }
382 
383 
384 
385 /**
386  * Test if command is send using secure messaging
387  *
388  * @type boolean
389  * @return true if secure messaging is using an authenticated header
390  */
391 APDU.prototype.isAuthenticatedHeader = function() {
392 	return (this.cla & 0x0C) == 0x0C;
393 }
394 
395 
396 
397 /**
398  * Gets the instruction byte
399  *
400  * @type Number
401  * @return the instruction byte
402  */
403 APDU.prototype.getINS = function() {
404 	return this.ins;
405 }
406 
407 
408 
409 /**
410  * Gets the P1 byte
411  *
412  * @type Number
413  * @return the P1 byte
414  */
415 APDU.prototype.getP1 = function() {
416 	return this.p1;
417 }
418 
419 
420 
421 /**
422  * Gets the P2 byte
423  *
424  * @type Number
425  * @return the P2 byte
426  */
427 APDU.prototype.getP2 = function() {
428 	return this.p2;
429 }
430 
431 
432 
433 /**
434  * Set the command data
435  *
436  * @param {ByteString} cdata the command data
437  */
438 APDU.prototype.setCData = function(cdata) {
439 	if (cdata instanceof ByteString) {
440 		this.cdata = cdata;
441 	} else {
442 		delete this.cdata;
443 	}
444 }
445 
446 
447 
448 /**
449  * Gets the command data
450  *
451  * @type ByteString
452  * @return the command data, if any else undefined
453  */
454 APDU.prototype.getCData = function() {
455 	return this.cdata;
456 }
457 
458 
459 
460 /**
461  * Check if APDU has command data
462  *
463  * @type boolean
464  * @return true if command APDU has data field
465  */
466 APDU.prototype.hasCData = function() {
467 	return typeof(this.cdata) != "undefined";
468 }
469 
470 
471 
472 /**
473  * Gets the command data as a list of TLV objects
474  *
475  * @type TLVList
476  * @return the command data as TLV list, if any else undefined
477  */
478 APDU.prototype.getCDataAsTLVList = function() {
479 	if (!this.hasCData()) {
480 		throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_INVDATA, "No data in command APDU");
481 	}
482 
483 	try	{
484 		var a = new TLVList(this.cdata, TLV.EMV);
485 	}
486 	catch(e) {
487 		throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_INVDATA, "Invalid TLV data in command APDU");
488 	}
489 
490 	return a;
491 }
492 
493 
494 
495 /**
496  * Gets the number of expected bytes
497  *
498  * @type Number
499  * @return the number of expected bytes or undefined
500  */
501 APDU.prototype.getNe = function() {
502 	return this.ne;
503 }
504 
505 
506 
507 /**
508  * Check if APDU has Le field
509  *
510  * @type boolean
511  * @return true if command APDU has Le field
512  */
513 APDU.prototype.hasLe = function() {
514 	return typeof(this.ne) != "undefined";
515 }
516 
517 
518 
519 /**
520  * Set secure channel object to be used in wrap and unwrap methods
521  *
522  * @param {SecureChannel} secureChannel the channel
523  */
524 APDU.prototype.setSecureChannel = function(secureChannel) {
525 	this.secureChannel = secureChannel;
526 }
527 
528 
529 
530 /**
531  * Return the secure channel, if any
532  *
533  * @type SecureChannel
534  * @return the secure channel
535  */
536 APDU.prototype.getSecureChannel = function() {
537 	return this.secureChannel;
538 }
539 
540 
541 
542 /**
543  * Test if a secure channel is defined for this APDU
544  *
545  * @type boolean
546  * @return true, if secure channel is set
547  */
548 APDU.prototype.hasSecureChannel = function() {
549 	return (typeof(this.secureChannel) != "undefined") && (this.secureChannel != null);
550 }
551 
552 
553 
554 /**
555  * Wrap APDU using secure channel
556  */
557 APDU.prototype.wrap = function() {
558 	if (this.hasSecureChannel()) {
559 		this.secureChannel.wrap(this);
560 	}
561 }
562 
563 
564 
565 /**
566  * Unwrap APDU using secure channel
567  */
568 APDU.prototype.unwrap = function() {
569 	if (this.hasSecureChannel()) {
570 		this.secureChannel.unwrap(this);
571 	}
572 }
573 
574 
575 
576 /**
577  * Sets the response data field for the response APDU
578  *
579  * @param {ByteString} data the response data field
580  */
581 APDU.prototype.setRData = function(data) {
582 	if ((data.length > 256) && !this.isExtendedLength()) {
583 		throw new GPError("APDU", GPError.INVALID_DATA, APDU.SW_WRONGLENGTH, "Too many bytes in APDU");
584 	}
585 	this.rdata = data;
586 }
587 
588 
589 
590 /**
591  * Get the response data
592  *
593  * @type ByteString
594  * @return the response data
595  */
596 APDU.prototype.getRData = function() {
597 	return this.rdata;
598 }
599 
600 
601 
602 /**
603  * Check if APDU has response data
604  *
605  * @type boolean
606  * @return true if response APDU has data field
607  */
608 APDU.prototype.hasRData = function() {
609 	return ((typeof(this.rdata) != "undefined") && (this.rdata != null));
610 }
611 
612 
613 
614 /**
615  * Sets the status word for the response ADPU
616  *
617  * @param {Number} sw the status word
618  */
619 APDU.prototype.setSW = function(sw) {
620 	this.SW = sw;
621 }
622 
623 
624 
625 /**
626  * Get the status word
627  *
628  * @type Number
629  * @return the status word
630  */
631 APDU.prototype.getSW = function() {
632 	return this.SW;
633 }
634 
635 
636 
637 /**
638  * Return a human readable form of this object
639  */
640 APDU.prototype.toString = function() {
641 	return this.getCommandAPDU().toString(HEX) + " : " + this.getResponseAPDU().toString(HEX);
642 }
643 
644 
645 
646 /**
647  * Simple unit test
648  */
649 APDU.test = function() {
650 	// Case 1
651 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C);
652 	print(a);
653 	assert(!a.isExtendedLength());
654 	var b = a.getCommandAPDU();
655 	assert(b.toString(HEX) == "00A4000C");
656 	var c = new APDU(b);
657 	assert(a.toString() == c.toString());
658 
659 	// Case 2 Short
660 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, 0);
661 	print(a);
662 	assert(!a.isExtendedLength());
663 	var b = a.getCommandAPDU();
664 	assert(b.toString(HEX) == "00A4000C00");
665 	var c = new APDU(b);
666 	assert(a.toString() == c.toString());
667 
668 	// Case 2 Extended
669 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, 65536);
670 	print(a);
671 	assert(a.isExtendedLength());
672 	var b = a.getCommandAPDU();
673 	assert(b.toString(HEX) == "00A4000C000000");
674 	var c = new APDU(b);
675 	print(c);
676 	assert(a.toString() == c.toString());
677 
678 	// Case 3 Short
679 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, new ByteString("3F00", HEX));
680 	print(a);
681 	assert(!a.isExtendedLength());
682 	var b = a.getCommandAPDU();
683 	assert(b.toString(HEX) == "00A4000C023F00");
684 	var c = new APDU(b);
685 	assert(a.toString() == c.toString());
686 
687 	// Case 3 Extended
688 	var data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
689 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, new ByteString(data, HEX));
690 	print(a);
691 	assert(a.isExtendedLength());
692 	var b = a.getCommandAPDU();
693 	assert(b.toString(HEX) == "00A4000C000100" + data);
694 	var c = new APDU(b);
695 	assert(a.toString() == c.toString());
696 
697 	// Case 4 Short
698 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, new ByteString("3F00", HEX), 0);
699 	print(a);
700 	assert(!a.isExtendedLength());
701 	var b = a.getCommandAPDU();
702 	assert(b.toString(HEX) == "00A4000C023F0000");
703 	var c = new APDU(b);
704 	assert(a.toString() == c.toString());
705 
706 	// Case 4b Extended
707 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, new ByteString(data, HEX), 0);
708 	print(a);
709 	assert(a.isExtendedLength());
710 	var b = a.getCommandAPDU();
711 	assert(b.toString(HEX) == "00A4000C000100" + data + "0000");
712 	var c = new APDU(b);
713 	assert(a.toString() == c.toString());
714 
715 	// Case 4b Extended
716 	var a = new APDU(0x00, 0xA4, 0x00, 0x0C, new ByteString("3F00", HEX), 65536);
717 	print(a);
718 	assert(a.isExtendedLength());
719 	var b = a.getCommandAPDU();
720 	assert(b.toString(HEX) == "00A4000C0000023F000000");
721 	var c = new APDU(b);
722 	assert(a.toString() == c.toString());
723 }
724