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cee5a30d | 1 | //----------------------------------------------------------------------------- |
2 | // Gerhard de Koning Gans - May 2008 | |
3 | // Hagen Fritsch - June 2010 | |
4 | // Gerhard de Koning Gans - May 2011 | |
1e262141 | 5 | // Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation |
cee5a30d | 6 | // |
7 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, | |
8 | // at your option, any later version. See the LICENSE.txt file for the text of | |
9 | // the license. | |
10 | //----------------------------------------------------------------------------- | |
11 | // Routines to support iClass. | |
12 | //----------------------------------------------------------------------------- | |
13 | // Based on ISO14443a implementation. Still in experimental phase. | |
14 | // Contribution made during a security research at Radboud University Nijmegen | |
15 | // | |
16 | // Please feel free to contribute and extend iClass support!! | |
17 | //----------------------------------------------------------------------------- | |
18 | // | |
cee5a30d | 19 | // FIX: |
20 | // ==== | |
21 | // We still have sometimes a demodulation error when snooping iClass communication. | |
22 | // The resulting trace of a read-block-03 command may look something like this: | |
23 | // | |
24 | // + 22279: : 0c 03 e8 01 | |
25 | // | |
26 | // ...with an incorrect answer... | |
27 | // | |
28 | // + 85: 0: TAG ff! ff! ff! ff! ff! ff! ff! ff! bb 33 bb 00 01! 0e! 04! bb !crc | |
29 | // | |
30 | // We still left the error signalling bytes in the traces like 0xbb | |
31 | // | |
32 | // A correct trace should look like this: | |
33 | // | |
34 | // + 21112: : 0c 03 e8 01 | |
35 | // + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5 | |
36 | // | |
37 | //----------------------------------------------------------------------------- | |
38 | ||
39 | #include "proxmark3.h" | |
40 | #include "apps.h" | |
41 | #include "util.h" | |
42 | #include "string.h" | |
7e67e42f | 43 | #include "common.h" |
fecd8202 | 44 | #include "cmd.h" |
1e262141 | 45 | // Needed for CRC in emulation mode; |
46 | // same construction as in ISO 14443; | |
47 | // different initial value (CRC_ICLASS) | |
48 | #include "iso14443crc.h" | |
c3963755 | 49 | #include "iso15693tools.h" |
b67f7ec3 | 50 | #include "protocols.h" |
10a8875c | 51 | #include "optimized_cipher.h" |
979c7655 | 52 | #include "usb_cdc.h" // for usb_poll_validate_length |
10a8875c | 53 | |
1e262141 | 54 | static int timeout = 4096; |
cee5a30d | 55 | |
cee5a30d | 56 | |
1e262141 | 57 | static int SendIClassAnswer(uint8_t *resp, int respLen, int delay); |
cee5a30d | 58 | |
59 | //----------------------------------------------------------------------------- | |
60 | // The software UART that receives commands from the reader, and its state | |
61 | // variables. | |
62 | //----------------------------------------------------------------------------- | |
63 | static struct { | |
64 | enum { | |
65 | STATE_UNSYNCD, | |
66 | STATE_START_OF_COMMUNICATION, | |
67 | STATE_RECEIVING | |
68 | } state; | |
69 | uint16_t shiftReg; | |
70 | int bitCnt; | |
71 | int byteCnt; | |
72 | int byteCntMax; | |
73 | int posCnt; | |
74 | int nOutOfCnt; | |
75 | int OutOfCnt; | |
76 | int syncBit; | |
1e262141 | 77 | int samples; |
cee5a30d | 78 | int highCnt; |
79 | int swapper; | |
80 | int counter; | |
81 | int bitBuffer; | |
82 | int dropPosition; | |
6a1f2d82 | 83 | uint8_t *output; |
cee5a30d | 84 | } Uart; |
85 | ||
1e262141 | 86 | static RAMFUNC int OutOfNDecoding(int bit) |
cee5a30d | 87 | { |
9f693930 | 88 | //int error = 0; |
cee5a30d | 89 | int bitright; |
90 | ||
91 | if(!Uart.bitBuffer) { | |
92 | Uart.bitBuffer = bit ^ 0xFF0; | |
93 | return FALSE; | |
94 | } | |
95 | else { | |
96 | Uart.bitBuffer <<= 4; | |
97 | Uart.bitBuffer ^= bit; | |
98 | } | |
99 | ||
100 | /*if(Uart.swapper) { | |
101 | Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; | |
102 | Uart.byteCnt++; | |
103 | Uart.swapper = 0; | |
104 | if(Uart.byteCnt > 15) { return TRUE; } | |
105 | } | |
106 | else { | |
107 | Uart.swapper = 1; | |
108 | }*/ | |
109 | ||
110 | if(Uart.state != STATE_UNSYNCD) { | |
111 | Uart.posCnt++; | |
112 | ||
113 | if((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { | |
114 | bit = 0x00; | |
115 | } | |
116 | else { | |
117 | bit = 0x01; | |
118 | } | |
119 | if(((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { | |
120 | bitright = 0x00; | |
121 | } | |
122 | else { | |
123 | bitright = 0x01; | |
124 | } | |
125 | if(bit != bitright) { bit = bitright; } | |
126 | ||
127 | ||
128 | // So, now we only have to deal with *bit*, lets see... | |
129 | if(Uart.posCnt == 1) { | |
130 | // measurement first half bitperiod | |
131 | if(!bit) { | |
132 | // Drop in first half means that we are either seeing | |
133 | // an SOF or an EOF. | |
134 | ||
135 | if(Uart.nOutOfCnt == 1) { | |
136 | // End of Communication | |
137 | Uart.state = STATE_UNSYNCD; | |
138 | Uart.highCnt = 0; | |
139 | if(Uart.byteCnt == 0) { | |
140 | // Its not straightforward to show single EOFs | |
141 | // So just leave it and do not return TRUE | |
6a1f2d82 | 142 | Uart.output[0] = 0xf0; |
cee5a30d | 143 | Uart.byteCnt++; |
cee5a30d | 144 | } |
145 | else { | |
146 | return TRUE; | |
147 | } | |
148 | } | |
149 | else if(Uart.state != STATE_START_OF_COMMUNICATION) { | |
150 | // When not part of SOF or EOF, it is an error | |
151 | Uart.state = STATE_UNSYNCD; | |
152 | Uart.highCnt = 0; | |
9f693930 | 153 | //error = 4; |
cee5a30d | 154 | } |
155 | } | |
156 | } | |
157 | else { | |
158 | // measurement second half bitperiod | |
159 | // Count the bitslot we are in... (ISO 15693) | |
160 | Uart.nOutOfCnt++; | |
161 | ||
162 | if(!bit) { | |
163 | if(Uart.dropPosition) { | |
164 | if(Uart.state == STATE_START_OF_COMMUNICATION) { | |
9f693930 | 165 | //error = 1; |
cee5a30d | 166 | } |
167 | else { | |
9f693930 | 168 | //error = 7; |
cee5a30d | 169 | } |
170 | // It is an error if we already have seen a drop in current frame | |
171 | Uart.state = STATE_UNSYNCD; | |
172 | Uart.highCnt = 0; | |
173 | } | |
174 | else { | |
175 | Uart.dropPosition = Uart.nOutOfCnt; | |
176 | } | |
177 | } | |
178 | ||
179 | Uart.posCnt = 0; | |
180 | ||
181 | ||
182 | if(Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) { | |
183 | Uart.nOutOfCnt = 0; | |
184 | ||
185 | if(Uart.state == STATE_START_OF_COMMUNICATION) { | |
186 | if(Uart.dropPosition == 4) { | |
187 | Uart.state = STATE_RECEIVING; | |
188 | Uart.OutOfCnt = 256; | |
189 | } | |
190 | else if(Uart.dropPosition == 3) { | |
191 | Uart.state = STATE_RECEIVING; | |
192 | Uart.OutOfCnt = 4; | |
193 | //Uart.output[Uart.byteCnt] = 0xdd; | |
194 | //Uart.byteCnt++; | |
195 | } | |
196 | else { | |
197 | Uart.state = STATE_UNSYNCD; | |
198 | Uart.highCnt = 0; | |
199 | } | |
200 | Uart.dropPosition = 0; | |
201 | } | |
202 | else { | |
203 | // RECEIVING DATA | |
204 | // 1 out of 4 | |
205 | if(!Uart.dropPosition) { | |
206 | Uart.state = STATE_UNSYNCD; | |
207 | Uart.highCnt = 0; | |
9f693930 | 208 | //error = 9; |
cee5a30d | 209 | } |
210 | else { | |
211 | Uart.shiftReg >>= 2; | |
212 | ||
213 | // Swap bit order | |
214 | Uart.dropPosition--; | |
215 | //if(Uart.dropPosition == 1) { Uart.dropPosition = 2; } | |
216 | //else if(Uart.dropPosition == 2) { Uart.dropPosition = 1; } | |
217 | ||
218 | Uart.shiftReg ^= ((Uart.dropPosition & 0x03) << 6); | |
219 | Uart.bitCnt += 2; | |
220 | Uart.dropPosition = 0; | |
221 | ||
222 | if(Uart.bitCnt == 8) { | |
223 | Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); | |
224 | Uart.byteCnt++; | |
cee5a30d | 225 | Uart.bitCnt = 0; |
226 | Uart.shiftReg = 0; | |
227 | } | |
228 | } | |
229 | } | |
230 | } | |
231 | else if(Uart.nOutOfCnt == Uart.OutOfCnt) { | |
232 | // RECEIVING DATA | |
233 | // 1 out of 256 | |
234 | if(!Uart.dropPosition) { | |
235 | Uart.state = STATE_UNSYNCD; | |
236 | Uart.highCnt = 0; | |
9f693930 | 237 | //error = 3; |
cee5a30d | 238 | } |
239 | else { | |
240 | Uart.dropPosition--; | |
241 | Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff); | |
242 | Uart.byteCnt++; | |
cee5a30d | 243 | Uart.bitCnt = 0; |
244 | Uart.shiftReg = 0; | |
245 | Uart.nOutOfCnt = 0; | |
246 | Uart.dropPosition = 0; | |
247 | } | |
248 | } | |
249 | ||
250 | /*if(error) { | |
251 | Uart.output[Uart.byteCnt] = 0xAA; | |
252 | Uart.byteCnt++; | |
253 | Uart.output[Uart.byteCnt] = error & 0xFF; | |
254 | Uart.byteCnt++; | |
255 | Uart.output[Uart.byteCnt] = 0xAA; | |
256 | Uart.byteCnt++; | |
257 | Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF; | |
258 | Uart.byteCnt++; | |
259 | Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; | |
260 | Uart.byteCnt++; | |
261 | Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF; | |
262 | Uart.byteCnt++; | |
263 | Uart.output[Uart.byteCnt] = 0xAA; | |
264 | Uart.byteCnt++; | |
265 | return TRUE; | |
266 | }*/ | |
267 | } | |
268 | ||
269 | } | |
270 | else { | |
271 | bit = Uart.bitBuffer & 0xf0; | |
272 | bit >>= 4; | |
273 | bit ^= 0x0F; // drops become 1s ;-) | |
274 | if(bit) { | |
275 | // should have been high or at least (4 * 128) / fc | |
276 | // according to ISO this should be at least (9 * 128 + 20) / fc | |
277 | if(Uart.highCnt == 8) { | |
278 | // we went low, so this could be start of communication | |
279 | // it turns out to be safer to choose a less significant | |
280 | // syncbit... so we check whether the neighbour also represents the drop | |
281 | Uart.posCnt = 1; // apparently we are busy with our first half bit period | |
282 | Uart.syncBit = bit & 8; | |
283 | Uart.samples = 3; | |
284 | if(!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } | |
285 | else if(bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } | |
286 | if(!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } | |
287 | else if(bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } | |
288 | if(!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; | |
289 | if(Uart.syncBit && (Uart.bitBuffer & 8)) { | |
290 | Uart.syncBit = 8; | |
291 | ||
292 | // the first half bit period is expected in next sample | |
293 | Uart.posCnt = 0; | |
294 | Uart.samples = 3; | |
295 | } | |
296 | } | |
297 | else if(bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } | |
298 | ||
299 | Uart.syncBit <<= 4; | |
300 | Uart.state = STATE_START_OF_COMMUNICATION; | |
301 | Uart.bitCnt = 0; | |
302 | Uart.byteCnt = 0; | |
cee5a30d | 303 | Uart.nOutOfCnt = 0; |
304 | Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256 | |
305 | Uart.dropPosition = 0; | |
306 | Uart.shiftReg = 0; | |
9f693930 | 307 | //error = 0; |
cee5a30d | 308 | } |
309 | else { | |
310 | Uart.highCnt = 0; | |
311 | } | |
312 | } | |
313 | else { | |
314 | if(Uart.highCnt < 8) { | |
315 | Uart.highCnt++; | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | return FALSE; | |
321 | } | |
322 | ||
323 | //============================================================================= | |
1e262141 | 324 | // Manchester |
cee5a30d | 325 | //============================================================================= |
326 | ||
327 | static struct { | |
328 | enum { | |
329 | DEMOD_UNSYNCD, | |
330 | DEMOD_START_OF_COMMUNICATION, | |
331 | DEMOD_START_OF_COMMUNICATION2, | |
332 | DEMOD_START_OF_COMMUNICATION3, | |
333 | DEMOD_SOF_COMPLETE, | |
334 | DEMOD_MANCHESTER_D, | |
335 | DEMOD_MANCHESTER_E, | |
336 | DEMOD_END_OF_COMMUNICATION, | |
337 | DEMOD_END_OF_COMMUNICATION2, | |
338 | DEMOD_MANCHESTER_F, | |
339 | DEMOD_ERROR_WAIT | |
340 | } state; | |
341 | int bitCount; | |
342 | int posCount; | |
343 | int syncBit; | |
cee5a30d | 344 | uint16_t shiftReg; |
345 | int buffer; | |
346 | int buffer2; | |
347 | int buffer3; | |
348 | int buff; | |
349 | int samples; | |
350 | int len; | |
351 | enum { | |
352 | SUB_NONE, | |
353 | SUB_FIRST_HALF, | |
354 | SUB_SECOND_HALF, | |
355 | SUB_BOTH | |
356 | } sub; | |
6a1f2d82 | 357 | uint8_t *output; |
cee5a30d | 358 | } Demod; |
359 | ||
360 | static RAMFUNC int ManchesterDecoding(int v) | |
361 | { | |
362 | int bit; | |
363 | int modulation; | |
364 | int error = 0; | |
365 | ||
366 | bit = Demod.buffer; | |
367 | Demod.buffer = Demod.buffer2; | |
368 | Demod.buffer2 = Demod.buffer3; | |
369 | Demod.buffer3 = v; | |
370 | ||
371 | if(Demod.buff < 3) { | |
372 | Demod.buff++; | |
373 | return FALSE; | |
374 | } | |
375 | ||
376 | if(Demod.state==DEMOD_UNSYNCD) { | |
377 | Demod.output[Demod.len] = 0xfa; | |
378 | Demod.syncBit = 0; | |
379 | //Demod.samples = 0; | |
380 | Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part | |
cee5a30d | 381 | |
382 | if(bit & 0x08) { | |
383 | Demod.syncBit = 0x08; | |
384 | } | |
385 | ||
386 | if(bit & 0x04) { | |
387 | if(Demod.syncBit) { | |
388 | bit <<= 4; | |
389 | } | |
390 | Demod.syncBit = 0x04; | |
391 | } | |
392 | ||
393 | if(bit & 0x02) { | |
394 | if(Demod.syncBit) { | |
395 | bit <<= 2; | |
396 | } | |
397 | Demod.syncBit = 0x02; | |
398 | } | |
399 | ||
400 | if(bit & 0x01 && Demod.syncBit) { | |
401 | Demod.syncBit = 0x01; | |
402 | } | |
403 | ||
404 | if(Demod.syncBit) { | |
405 | Demod.len = 0; | |
406 | Demod.state = DEMOD_START_OF_COMMUNICATION; | |
407 | Demod.sub = SUB_FIRST_HALF; | |
408 | Demod.bitCount = 0; | |
409 | Demod.shiftReg = 0; | |
cee5a30d | 410 | Demod.samples = 0; |
411 | if(Demod.posCount) { | |
412 | //if(trigger) LED_A_OFF(); // Not useful in this case... | |
413 | switch(Demod.syncBit) { | |
414 | case 0x08: Demod.samples = 3; break; | |
415 | case 0x04: Demod.samples = 2; break; | |
416 | case 0x02: Demod.samples = 1; break; | |
417 | case 0x01: Demod.samples = 0; break; | |
418 | } | |
419 | // SOF must be long burst... otherwise stay unsynced!!! | |
420 | if(!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) { | |
421 | Demod.state = DEMOD_UNSYNCD; | |
422 | } | |
423 | } | |
424 | else { | |
425 | // SOF must be long burst... otherwise stay unsynced!!! | |
426 | if(!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) { | |
427 | Demod.state = DEMOD_UNSYNCD; | |
428 | error = 0x88; | |
429 | } | |
430 | ||
431 | } | |
432 | error = 0; | |
433 | ||
434 | } | |
435 | } | |
436 | else { | |
437 | modulation = bit & Demod.syncBit; | |
438 | modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; | |
cee5a30d | 439 | |
440 | Demod.samples += 4; | |
441 | ||
442 | if(Demod.posCount==0) { | |
443 | Demod.posCount = 1; | |
444 | if(modulation) { | |
445 | Demod.sub = SUB_FIRST_HALF; | |
446 | } | |
447 | else { | |
448 | Demod.sub = SUB_NONE; | |
449 | } | |
450 | } | |
451 | else { | |
452 | Demod.posCount = 0; | |
453 | /*(modulation && (Demod.sub == SUB_FIRST_HALF)) { | |
454 | if(Demod.state!=DEMOD_ERROR_WAIT) { | |
455 | Demod.state = DEMOD_ERROR_WAIT; | |
456 | Demod.output[Demod.len] = 0xaa; | |
457 | error = 0x01; | |
458 | } | |
459 | }*/ | |
460 | //else if(modulation) { | |
461 | if(modulation) { | |
462 | if(Demod.sub == SUB_FIRST_HALF) { | |
463 | Demod.sub = SUB_BOTH; | |
464 | } | |
465 | else { | |
466 | Demod.sub = SUB_SECOND_HALF; | |
467 | } | |
468 | } | |
469 | else if(Demod.sub == SUB_NONE) { | |
470 | if(Demod.state == DEMOD_SOF_COMPLETE) { | |
471 | Demod.output[Demod.len] = 0x0f; | |
472 | Demod.len++; | |
cee5a30d | 473 | Demod.state = DEMOD_UNSYNCD; |
474 | // error = 0x0f; | |
475 | return TRUE; | |
476 | } | |
477 | else { | |
478 | Demod.state = DEMOD_ERROR_WAIT; | |
479 | error = 0x33; | |
480 | } | |
481 | /*if(Demod.state!=DEMOD_ERROR_WAIT) { | |
482 | Demod.state = DEMOD_ERROR_WAIT; | |
483 | Demod.output[Demod.len] = 0xaa; | |
484 | error = 0x01; | |
485 | }*/ | |
486 | } | |
487 | ||
488 | switch(Demod.state) { | |
489 | case DEMOD_START_OF_COMMUNICATION: | |
490 | if(Demod.sub == SUB_BOTH) { | |
491 | //Demod.state = DEMOD_MANCHESTER_D; | |
492 | Demod.state = DEMOD_START_OF_COMMUNICATION2; | |
493 | Demod.posCount = 1; | |
494 | Demod.sub = SUB_NONE; | |
495 | } | |
496 | else { | |
497 | Demod.output[Demod.len] = 0xab; | |
498 | Demod.state = DEMOD_ERROR_WAIT; | |
499 | error = 0xd2; | |
500 | } | |
501 | break; | |
502 | case DEMOD_START_OF_COMMUNICATION2: | |
503 | if(Demod.sub == SUB_SECOND_HALF) { | |
504 | Demod.state = DEMOD_START_OF_COMMUNICATION3; | |
505 | } | |
506 | else { | |
507 | Demod.output[Demod.len] = 0xab; | |
508 | Demod.state = DEMOD_ERROR_WAIT; | |
509 | error = 0xd3; | |
510 | } | |
511 | break; | |
512 | case DEMOD_START_OF_COMMUNICATION3: | |
513 | if(Demod.sub == SUB_SECOND_HALF) { | |
514 | // Demod.state = DEMOD_MANCHESTER_D; | |
515 | Demod.state = DEMOD_SOF_COMPLETE; | |
516 | //Demod.output[Demod.len] = Demod.syncBit & 0xFF; | |
517 | //Demod.len++; | |
518 | } | |
519 | else { | |
520 | Demod.output[Demod.len] = 0xab; | |
521 | Demod.state = DEMOD_ERROR_WAIT; | |
522 | error = 0xd4; | |
523 | } | |
524 | break; | |
525 | case DEMOD_SOF_COMPLETE: | |
526 | case DEMOD_MANCHESTER_D: | |
527 | case DEMOD_MANCHESTER_E: | |
528 | // OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443) | |
529 | // 00001111 = 1 (0 in 14443) | |
530 | if(Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF | |
531 | Demod.bitCount++; | |
532 | Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100; | |
533 | Demod.state = DEMOD_MANCHESTER_D; | |
534 | } | |
535 | else if(Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF | |
536 | Demod.bitCount++; | |
537 | Demod.shiftReg >>= 1; | |
538 | Demod.state = DEMOD_MANCHESTER_E; | |
539 | } | |
540 | else if(Demod.sub == SUB_BOTH) { | |
541 | Demod.state = DEMOD_MANCHESTER_F; | |
542 | } | |
543 | else { | |
544 | Demod.state = DEMOD_ERROR_WAIT; | |
545 | error = 0x55; | |
546 | } | |
547 | break; | |
548 | ||
549 | case DEMOD_MANCHESTER_F: | |
550 | // Tag response does not need to be a complete byte! | |
551 | if(Demod.len > 0 || Demod.bitCount > 0) { | |
552 | if(Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF | |
6a1f2d82 | 553 | Demod.shiftReg >>= (9 - Demod.bitCount); // right align data |
cee5a30d | 554 | Demod.output[Demod.len] = Demod.shiftReg & 0xff; |
555 | Demod.len++; | |
cee5a30d | 556 | } |
557 | ||
558 | Demod.state = DEMOD_UNSYNCD; | |
559 | return TRUE; | |
560 | } | |
561 | else { | |
562 | Demod.output[Demod.len] = 0xad; | |
563 | Demod.state = DEMOD_ERROR_WAIT; | |
564 | error = 0x03; | |
565 | } | |
566 | break; | |
567 | ||
568 | case DEMOD_ERROR_WAIT: | |
569 | Demod.state = DEMOD_UNSYNCD; | |
570 | break; | |
571 | ||
572 | default: | |
573 | Demod.output[Demod.len] = 0xdd; | |
574 | Demod.state = DEMOD_UNSYNCD; | |
575 | break; | |
576 | } | |
577 | ||
578 | /*if(Demod.bitCount>=9) { | |
579 | Demod.output[Demod.len] = Demod.shiftReg & 0xff; | |
580 | Demod.len++; | |
581 | ||
582 | Demod.parityBits <<= 1; | |
583 | Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01); | |
584 | ||
585 | Demod.bitCount = 0; | |
586 | Demod.shiftReg = 0; | |
587 | }*/ | |
588 | if(Demod.bitCount>=8) { | |
589 | Demod.shiftReg >>= 1; | |
590 | Demod.output[Demod.len] = (Demod.shiftReg & 0xff); | |
591 | Demod.len++; | |
cee5a30d | 592 | Demod.bitCount = 0; |
593 | Demod.shiftReg = 0; | |
594 | } | |
595 | ||
596 | if(error) { | |
597 | Demod.output[Demod.len] = 0xBB; | |
598 | Demod.len++; | |
599 | Demod.output[Demod.len] = error & 0xFF; | |
600 | Demod.len++; | |
601 | Demod.output[Demod.len] = 0xBB; | |
602 | Demod.len++; | |
603 | Demod.output[Demod.len] = bit & 0xFF; | |
604 | Demod.len++; | |
605 | Demod.output[Demod.len] = Demod.buffer & 0xFF; | |
606 | Demod.len++; | |
607 | // Look harder ;-) | |
608 | Demod.output[Demod.len] = Demod.buffer2 & 0xFF; | |
609 | Demod.len++; | |
610 | Demod.output[Demod.len] = Demod.syncBit & 0xFF; | |
611 | Demod.len++; | |
612 | Demod.output[Demod.len] = 0xBB; | |
613 | Demod.len++; | |
614 | return TRUE; | |
615 | } | |
616 | ||
617 | } | |
618 | ||
619 | } // end (state != UNSYNCED) | |
620 | ||
621 | return FALSE; | |
622 | } | |
623 | ||
624 | //============================================================================= | |
1e262141 | 625 | // Finally, a `sniffer' for iClass communication |
cee5a30d | 626 | // Both sides of communication! |
627 | //============================================================================= | |
628 | ||
629 | //----------------------------------------------------------------------------- | |
630 | // Record the sequence of commands sent by the reader to the tag, with | |
631 | // triggering so that we start recording at the point that the tag is moved | |
632 | // near the reader. | |
633 | //----------------------------------------------------------------------------- | |
634 | void RAMFUNC SnoopIClass(void) | |
635 | { | |
17cba269 | 636 | |
cee5a30d | 637 | |
638 | // We won't start recording the frames that we acquire until we trigger; | |
639 | // a good trigger condition to get started is probably when we see a | |
640 | // response from the tag. | |
9f693930 | 641 | //int triggered = FALSE; // FALSE to wait first for card |
cee5a30d | 642 | |
643 | // The command (reader -> tag) that we're receiving. | |
644 | // The length of a received command will in most cases be no more than 18 bytes. | |
645 | // So 32 should be enough! | |
f71f4deb | 646 | #define ICLASS_BUFFER_SIZE 32 |
647 | uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE]; | |
cee5a30d | 648 | // The response (tag -> reader) that we're receiving. |
f71f4deb | 649 | uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE]; |
6a1f2d82 | 650 | |
7cc204bf | 651 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
652 | ||
f71f4deb | 653 | // free all BigBuf memory |
654 | BigBuf_free(); | |
655 | // The DMA buffer, used to stream samples from the FPGA | |
656 | uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); | |
657 | ||
3000dc4e MHS |
658 | set_tracing(TRUE); |
659 | clear_trace(); | |
1e262141 | 660 | iso14a_set_trigger(FALSE); |
cee5a30d | 661 | |
f71f4deb | 662 | int lastRxCounter; |
117d9ec2 | 663 | uint8_t *upTo; |
cee5a30d | 664 | int smpl; |
665 | int maxBehindBy = 0; | |
666 | ||
667 | // Count of samples received so far, so that we can include timing | |
668 | // information in the trace buffer. | |
669 | int samples = 0; | |
670 | rsamples = 0; | |
671 | ||
cee5a30d | 672 | // Set up the demodulator for tag -> reader responses. |
17cba269 | 673 | Demod.output = tagToReaderResponse; |
cee5a30d | 674 | Demod.len = 0; |
675 | Demod.state = DEMOD_UNSYNCD; | |
676 | ||
677 | // Setup for the DMA. | |
678 | FpgaSetupSsc(); | |
679 | upTo = dmaBuf; | |
680 | lastRxCounter = DMA_BUFFER_SIZE; | |
681 | FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); | |
682 | ||
683 | // And the reader -> tag commands | |
684 | memset(&Uart, 0, sizeof(Uart)); | |
17cba269 | 685 | Uart.output = readerToTagCmd; |
cee5a30d | 686 | Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// |
687 | Uart.state = STATE_UNSYNCD; | |
688 | ||
689 | // And put the FPGA in the appropriate mode | |
690 | // Signal field is off with the appropriate LED | |
691 | LED_D_OFF(); | |
692 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); | |
693 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
694 | ||
81012e67 | 695 | uint32_t time_0 = GetCountSspClk(); |
55eaed8f MHS |
696 | uint32_t time_start = 0; |
697 | uint32_t time_stop = 0; | |
81012e67 | 698 | |
cee5a30d | 699 | int div = 0; |
700 | //int div2 = 0; | |
701 | int decbyte = 0; | |
702 | int decbyter = 0; | |
703 | ||
704 | // And now we loop, receiving samples. | |
705 | for(;;) { | |
706 | LED_A_ON(); | |
707 | WDT_HIT(); | |
708 | int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & | |
709 | (DMA_BUFFER_SIZE-1); | |
710 | if(behindBy > maxBehindBy) { | |
711 | maxBehindBy = behindBy; | |
f71f4deb | 712 | if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) { |
cee5a30d | 713 | Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); |
714 | goto done; | |
715 | } | |
716 | } | |
717 | if(behindBy < 1) continue; | |
718 | ||
719 | LED_A_OFF(); | |
720 | smpl = upTo[0]; | |
721 | upTo++; | |
722 | lastRxCounter -= 1; | |
723 | if(upTo - dmaBuf > DMA_BUFFER_SIZE) { | |
724 | upTo -= DMA_BUFFER_SIZE; | |
725 | lastRxCounter += DMA_BUFFER_SIZE; | |
726 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; | |
727 | AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; | |
728 | } | |
729 | ||
730 | //samples += 4; | |
731 | samples += 1; | |
cee5a30d | 732 | |
cee5a30d | 733 | if(smpl & 0xF) { |
734 | decbyte ^= (1 << (3 - div)); | |
735 | } | |
cee5a30d | 736 | |
737 | // FOR READER SIDE COMMUMICATION... | |
17cba269 | 738 | |
cee5a30d | 739 | decbyter <<= 2; |
740 | decbyter ^= (smpl & 0x30); | |
741 | ||
742 | div++; | |
743 | ||
744 | if((div + 1) % 2 == 0) { | |
745 | smpl = decbyter; | |
1e262141 | 746 | if(OutOfNDecoding((smpl & 0xF0) >> 4)) { |
cee5a30d | 747 | rsamples = samples - Uart.samples; |
55eaed8f | 748 | time_stop = (GetCountSspClk()-time_0) << 4; |
cee5a30d | 749 | LED_C_ON(); |
17cba269 | 750 | |
81012e67 | 751 | //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break; |
17cba269 | 752 | //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break; |
6a1f2d82 | 753 | if(tracing) { |
754 | uint8_t parity[MAX_PARITY_SIZE]; | |
755 | GetParity(Uart.output, Uart.byteCnt, parity); | |
55eaed8f | 756 | LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE); |
81012e67 MHS |
757 | } |
758 | ||
17cba269 MHS |
759 | |
760 | /* And ready to receive another command. */ | |
cee5a30d | 761 | Uart.state = STATE_UNSYNCD; |
762 | /* And also reset the demod code, which might have been */ | |
763 | /* false-triggered by the commands from the reader. */ | |
764 | Demod.state = DEMOD_UNSYNCD; | |
765 | LED_B_OFF(); | |
766 | Uart.byteCnt = 0; | |
55eaed8f MHS |
767 | }else{ |
768 | time_start = (GetCountSspClk()-time_0) << 4; | |
cee5a30d | 769 | } |
770 | decbyter = 0; | |
771 | } | |
772 | ||
773 | if(div > 3) { | |
774 | smpl = decbyte; | |
775 | if(ManchesterDecoding(smpl & 0x0F)) { | |
55eaed8f MHS |
776 | time_stop = (GetCountSspClk()-time_0) << 4; |
777 | ||
778 | rsamples = samples - Demod.samples; | |
cee5a30d | 779 | LED_B_ON(); |
780 | ||
6a1f2d82 | 781 | if(tracing) { |
782 | uint8_t parity[MAX_PARITY_SIZE]; | |
783 | GetParity(Demod.output, Demod.len, parity); | |
55eaed8f | 784 | LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE); |
81012e67 | 785 | } |
17cba269 | 786 | |
cee5a30d | 787 | // And ready to receive another response. |
788 | memset(&Demod, 0, sizeof(Demod)); | |
17cba269 | 789 | Demod.output = tagToReaderResponse; |
cee5a30d | 790 | Demod.state = DEMOD_UNSYNCD; |
791 | LED_C_OFF(); | |
55eaed8f MHS |
792 | }else{ |
793 | time_start = (GetCountSspClk()-time_0) << 4; | |
cee5a30d | 794 | } |
795 | ||
796 | div = 0; | |
797 | decbyte = 0x00; | |
798 | } | |
799 | //} | |
800 | ||
801 | if(BUTTON_PRESS()) { | |
802 | DbpString("cancelled_a"); | |
803 | goto done; | |
804 | } | |
805 | } | |
806 | ||
807 | DbpString("COMMAND FINISHED"); | |
808 | ||
809 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); | |
3000dc4e | 810 | Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); |
cee5a30d | 811 | |
812 | done: | |
813 | AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; | |
814 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); | |
3000dc4e | 815 | Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); |
cee5a30d | 816 | LED_A_OFF(); |
817 | LED_B_OFF(); | |
1e262141 | 818 | LED_C_OFF(); |
819 | LED_D_OFF(); | |
820 | } | |
821 | ||
912a3e94 | 822 | void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { |
823 | int i; | |
824 | for(i = 0; i < 8; i++) { | |
825 | rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5); | |
1e262141 | 826 | } |
827 | } | |
828 | ||
829 | //----------------------------------------------------------------------------- | |
830 | // Wait for commands from reader | |
831 | // Stop when button is pressed | |
832 | // Or return TRUE when command is captured | |
833 | //----------------------------------------------------------------------------- | |
834 | static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen) | |
835 | { | |
912a3e94 | 836 | // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen |
1e262141 | 837 | // only, since we are receiving, not transmitting). |
838 | // Signal field is off with the appropriate LED | |
839 | LED_D_OFF(); | |
840 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); | |
841 | ||
842 | // Now run a `software UART' on the stream of incoming samples. | |
843 | Uart.output = received; | |
844 | Uart.byteCntMax = maxLen; | |
845 | Uart.state = STATE_UNSYNCD; | |
846 | ||
847 | for(;;) { | |
848 | WDT_HIT(); | |
849 | ||
850 | if(BUTTON_PRESS()) return FALSE; | |
851 | ||
852 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
853 | AT91C_BASE_SSC->SSC_THR = 0x00; | |
854 | } | |
855 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
856 | uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; | |
3fe4ff4f | 857 | |
1e262141 | 858 | if(OutOfNDecoding(b & 0x0f)) { |
859 | *len = Uart.byteCnt; | |
860 | return TRUE; | |
861 | } | |
862 | } | |
863 | } | |
864 | } | |
865 | ||
645c960f MHS |
866 | static uint8_t encode4Bits(const uint8_t b) |
867 | { | |
868 | uint8_t c = b & 0xF; | |
869 | // OTA, the least significant bits first | |
870 | // The columns are | |
871 | // 1 - Bit value to send | |
872 | // 2 - Reversed (big-endian) | |
873 | // 3 - Encoded | |
874 | // 4 - Hex values | |
875 | ||
876 | switch(c){ | |
877 | // 1 2 3 4 | |
878 | case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 | |
879 | case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 | |
880 | case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 | |
881 | case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 | |
882 | case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 | |
883 | case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 | |
884 | case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 | |
885 | case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 | |
886 | case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 | |
887 | case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 | |
888 | case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 | |
889 | case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 | |
890 | case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a | |
891 | case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a | |
892 | case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a | |
893 | default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa | |
894 | ||
895 | } | |
896 | } | |
1e262141 | 897 | |
898 | //----------------------------------------------------------------------------- | |
899 | // Prepare tag messages | |
900 | //----------------------------------------------------------------------------- | |
901 | static void CodeIClassTagAnswer(const uint8_t *cmd, int len) | |
902 | { | |
645c960f MHS |
903 | |
904 | /* | |
905 | * SOF comprises 3 parts; | |
906 | * * An unmodulated time of 56.64 us | |
907 | * * 24 pulses of 423.75 KHz (fc/32) | |
908 | * * A logic 1, which starts with an unmodulated time of 18.88us | |
909 | * followed by 8 pulses of 423.75kHz (fc/32) | |
910 | * | |
911 | * | |
912 | * EOF comprises 3 parts: | |
913 | * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated | |
914 | * time of 18.88us. | |
915 | * - 24 pulses of fc/32 | |
916 | * - An unmodulated time of 56.64 us | |
917 | * | |
918 | * | |
919 | * A logic 0 starts with 8 pulses of fc/32 | |
920 | * followed by an unmodulated time of 256/fc (~18,88us). | |
921 | * | |
922 | * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by | |
923 | * 8 pulses of fc/32 (also 18.88us) | |
924 | * | |
925 | * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag, | |
926 | * works like this. | |
927 | * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us). | |
928 | * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us | |
929 | * | |
6b038d19 | 930 | * In this mode the SOF can be written as 00011101 = 0x1D |
645c960f MHS |
931 | * The EOF can be written as 10111000 = 0xb8 |
932 | * A logic 1 is 01 | |
933 | * A logic 0 is 10 | |
934 | * | |
935 | * */ | |
936 | ||
1e262141 | 937 | int i; |
938 | ||
939 | ToSendReset(); | |
940 | ||
941 | // Send SOF | |
645c960f | 942 | ToSend[++ToSendMax] = 0x1D; |
1e262141 | 943 | |
944 | for(i = 0; i < len; i++) { | |
1e262141 | 945 | uint8_t b = cmd[i]; |
645c960f MHS |
946 | ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half |
947 | ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half | |
1e262141 | 948 | } |
949 | ||
950 | // Send EOF | |
645c960f | 951 | ToSend[++ToSendMax] = 0xB8; |
81012e67 | 952 | //lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end |
1e262141 | 953 | // Convert from last byte pos to length |
954 | ToSendMax++; | |
955 | } | |
956 | ||
957 | // Only SOF | |
958 | static void CodeIClassTagSOF() | |
959 | { | |
81012e67 MHS |
960 | //So far a dummy implementation, not used |
961 | //int lastProxToAirDuration =0; | |
1e262141 | 962 | |
81012e67 | 963 | ToSendReset(); |
1e262141 | 964 | // Send SOF |
645c960f | 965 | ToSend[++ToSendMax] = 0x1D; |
81012e67 MHS |
966 | // lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning |
967 | ||
1e262141 | 968 | // Convert from last byte pos to length |
969 | ToSendMax++; | |
970 | } | |
b67f7ec3 MHS |
971 | #define MODE_SIM_CSN 0 |
972 | #define MODE_EXIT_AFTER_MAC 1 | |
973 | #define MODE_FULLSIM 2 | |
55eaed8f | 974 | |
b67f7ec3 | 975 | int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf); |
ff7bb4ef MHS |
976 | /** |
977 | * @brief SimulateIClass simulates an iClass card. | |
978 | * @param arg0 type of simulation | |
979 | * - 0 uses the first 8 bytes in usb data as CSN | |
980 | * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified | |
981 | * in the usb data. This mode collects MAC from the reader, in order to do an offline | |
982 | * attack on the keys. For more info, see "dismantling iclass" and proxclone.com. | |
983 | * - Other : Uses the default CSN (031fec8af7ff12e0) | |
984 | * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only) | |
985 | * @param arg2 | |
986 | * @param datain | |
987 | */ | |
988 | void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) | |
1e262141 | 989 | { |
ff7bb4ef MHS |
990 | uint32_t simType = arg0; |
991 | uint32_t numberOfCSNS = arg1; | |
7cc204bf | 992 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
1e262141 | 993 | |
ff7bb4ef | 994 | // Enable and clear the trace |
3000dc4e MHS |
995 | set_tracing(TRUE); |
996 | clear_trace(); | |
b67f7ec3 MHS |
997 | //Use the emulator memory for SIM |
998 | uint8_t *emulator = BigBuf_get_EM_addr(); | |
81cd0474 | 999 | |
ff7bb4ef MHS |
1000 | if(simType == 0) { |
1001 | // Use the CSN from commandline | |
b67f7ec3 MHS |
1002 | memcpy(emulator, datain, 8); |
1003 | doIClassSimulation(MODE_SIM_CSN,NULL); | |
ff7bb4ef MHS |
1004 | }else if(simType == 1) |
1005 | { | |
b67f7ec3 MHS |
1006 | //Default CSN |
1007 | uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; | |
1008 | // Use the CSN from commandline | |
1009 | memcpy(emulator, csn_crc, 8); | |
1010 | doIClassSimulation(MODE_SIM_CSN,NULL); | |
ff7bb4ef MHS |
1011 | } |
1012 | else if(simType == 2) | |
1013 | { | |
9f6e9d15 | 1014 | |
7b941c8d | 1015 | uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 }; |
eabba3df | 1016 | Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS); |
ff7bb4ef MHS |
1017 | // In this mode, a number of csns are within datain. We'll simulate each one, one at a time |
1018 | // in order to collect MAC's from the reader. This can later be used in an offlne-attack | |
1019 | // in order to obtain the keys, as in the "dismantling iclass"-paper. | |
9f6e9d15 MHS |
1020 | int i = 0; |
1021 | for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++) | |
ff7bb4ef MHS |
1022 | { |
1023 | // The usb data is 512 bytes, fitting 65 8-byte CSNs in there. | |
1024 | ||
b67f7ec3 MHS |
1025 | memcpy(emulator, datain+(i*8), 8); |
1026 | if(doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8)) | |
f83cc126 | 1027 | { |
645c960f | 1028 | cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8); |
f83cc126 MHS |
1029 | return; // Button pressed |
1030 | } | |
ff7bb4ef | 1031 | } |
9f6e9d15 MHS |
1032 | cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8); |
1033 | ||
b67f7ec3 MHS |
1034 | }else if(simType == 3){ |
1035 | //This is 'full sim' mode, where we use the emulator storage for data. | |
1036 | doIClassSimulation(MODE_FULLSIM, NULL); | |
81012e67 MHS |
1037 | } |
1038 | else{ | |
ff7bb4ef MHS |
1039 | // We may want a mode here where we hardcode the csns to use (from proxclone). |
1040 | // That will speed things up a little, but not required just yet. | |
1041 | Dbprintf("The mode is not implemented, reserved for future use"); | |
1042 | } | |
9f6e9d15 | 1043 | Dbprintf("Done..."); |
ff7bb4ef MHS |
1044 | |
1045 | } | |
c8387e85 MHS |
1046 | void AppendCrc(uint8_t* data, int len) |
1047 | { | |
1048 | ComputeCrc14443(CRC_ICLASS,data,len,data+len,data+len+1); | |
1049 | } | |
b67f7ec3 | 1050 | |
ff7bb4ef MHS |
1051 | /** |
1052 | * @brief Does the actual simulation | |
1053 | * @param csn - csn to use | |
1054 | * @param breakAfterMacReceived if true, returns after reader MAC has been received. | |
1055 | */ | |
b67f7ec3 | 1056 | int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf) |
ff7bb4ef | 1057 | { |
b67f7ec3 MHS |
1058 | // free eventually allocated BigBuf memory |
1059 | BigBuf_free_keep_EM(); | |
55eaed8f | 1060 | |
61fe9073 MHS |
1061 | State cipher_state; |
1062 | // State cipher_state_reserve; | |
b67f7ec3 MHS |
1063 | uint8_t *csn = BigBuf_get_EM_addr(); |
1064 | uint8_t *emulator = csn; | |
1065 | uint8_t sof_data[] = { 0x0F} ; | |
1e262141 | 1066 | // CSN followed by two CRC bytes |
b67f7ec3 MHS |
1067 | uint8_t anticoll_data[10] = { 0 }; |
1068 | uint8_t csn_data[10] = { 0 }; | |
1069 | memcpy(csn_data,csn,sizeof(csn_data)); | |
f83cc126 | 1070 | Dbprintf("Simulating CSN %02x%02x%02x%02x%02x%02x%02x%02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]); |
1e262141 | 1071 | |
1e262141 | 1072 | // Construct anticollision-CSN |
b67f7ec3 | 1073 | rotateCSN(csn_data,anticoll_data); |
1e262141 | 1074 | |
1075 | // Compute CRC on both CSNs | |
b67f7ec3 MHS |
1076 | ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]); |
1077 | ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]); | |
1078 | ||
61fe9073 | 1079 | uint8_t diversified_key[8] = { 0 }; |
b67f7ec3 MHS |
1080 | // e-Purse |
1081 | uint8_t card_challenge_data[8] = { 0x00 }; | |
1082 | if(simulationMode == MODE_FULLSIM) | |
1083 | { | |
e5cd4ee4 MHS |
1084 | //The diversified key should be stored on block 3 |
1085 | //Get the diversified key from emulator memory | |
1086 | memcpy(diversified_key, emulator+(8*3),8); | |
1087 | ||
b67f7ec3 MHS |
1088 | //Card challenge, a.k.a e-purse is on block 2 |
1089 | memcpy(card_challenge_data,emulator + (8 * 2) , 8); | |
61fe9073 | 1090 | //Precalculate the cipher state, feeding it the CC |
e5cd4ee4 MHS |
1091 | cipher_state = opt_doTagMAC_1(card_challenge_data,diversified_key); |
1092 | ||
b67f7ec3 | 1093 | } |
1e262141 | 1094 | |
ff7bb4ef | 1095 | int exitLoop = 0; |
1e262141 | 1096 | // Reader 0a |
1097 | // Tag 0f | |
1098 | // Reader 0c | |
1099 | // Tag anticoll. CSN | |
1100 | // Reader 81 anticoll. CSN | |
1101 | // Tag CSN | |
1102 | ||
55eaed8f | 1103 | uint8_t *modulated_response; |
b19caaef | 1104 | int modulated_response_size = 0; |
55eaed8f MHS |
1105 | uint8_t* trace_data = NULL; |
1106 | int trace_data_size = 0; | |
1e262141 | 1107 | |
b67f7ec3 | 1108 | |
645c960f | 1109 | // Respond SOF -- takes 1 bytes |
b67f7ec3 MHS |
1110 | uint8_t *resp_sof = BigBuf_malloc(2); |
1111 | int resp_sof_Len; | |
1e262141 | 1112 | |
1113 | // Anticollision CSN (rotated CSN) | |
645c960f | 1114 | // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) |
b67f7ec3 MHS |
1115 | uint8_t *resp_anticoll = BigBuf_malloc(28); |
1116 | int resp_anticoll_len; | |
1e262141 | 1117 | |
1118 | // CSN | |
645c960f | 1119 | // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) |
b67f7ec3 MHS |
1120 | uint8_t *resp_csn = BigBuf_malloc(30); |
1121 | int resp_csn_len; | |
1e262141 | 1122 | |
1123 | // e-Purse | |
b3cc5f29 | 1124 | // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) |
b67f7ec3 MHS |
1125 | uint8_t *resp_cc = BigBuf_malloc(20); |
1126 | int resp_cc_len; | |
1e262141 | 1127 | |
f71f4deb | 1128 | uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); |
1e262141 | 1129 | int len; |
1130 | ||
1e262141 | 1131 | // Prepare card messages |
1132 | ToSendMax = 0; | |
1133 | ||
1134 | // First card answer: SOF | |
1135 | CodeIClassTagSOF(); | |
b67f7ec3 | 1136 | memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax; |
1e262141 | 1137 | |
1138 | // Anticollision CSN | |
b67f7ec3 MHS |
1139 | CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data)); |
1140 | memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax; | |
1e262141 | 1141 | |
1142 | // CSN | |
b67f7ec3 MHS |
1143 | CodeIClassTagAnswer(csn_data, sizeof(csn_data)); |
1144 | memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax; | |
1e262141 | 1145 | |
1146 | // e-Purse | |
b67f7ec3 MHS |
1147 | CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data)); |
1148 | memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax; | |
1e262141 | 1149 | |
b19caaef | 1150 | //This is used for responding to READ-block commands or other data which is dynamically generated |
c8387e85 MHS |
1151 | //First the 'trace'-data, not encoded for FPGA |
1152 | uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer | |
1153 | //Then storage for the modulated data | |
1154 | //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes) | |
1155 | uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2); | |
e3dc1e4c MHS |
1156 | |
1157 | // Start from off (no field generated) | |
fa541aca MHS |
1158 | //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
1159 | //SpinDelay(200); | |
1160 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); | |
1161 | SpinDelay(100); | |
1162 | StartCountSspClk(); | |
1e262141 | 1163 | // We need to listen to the high-frequency, peak-detected path. |
1164 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1165 | FpgaSetupSsc(); | |
1166 | ||
1167 | // To control where we are in the protocol | |
1e262141 | 1168 | int cmdsRecvd = 0; |
81012e67 MHS |
1169 | uint32_t time_0 = GetCountSspClk(); |
1170 | uint32_t t2r_time =0; | |
1171 | uint32_t r2t_time =0; | |
912a3e94 | 1172 | |
1e262141 | 1173 | LED_A_ON(); |
f83cc126 | 1174 | bool buttonPressed = false; |
e5cd4ee4 | 1175 | uint8_t response_delay = 1; |
ff7bb4ef | 1176 | while(!exitLoop) { |
e5cd4ee4 | 1177 | response_delay = 1; |
1e262141 | 1178 | LED_B_OFF(); |
e3dc1e4c MHS |
1179 | //Signal tracer |
1180 | // Can be used to get a trigger for an oscilloscope.. | |
1181 | LED_C_OFF(); | |
3fe4ff4f | 1182 | |
1e262141 | 1183 | if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) { |
f83cc126 | 1184 | buttonPressed = true; |
1e262141 | 1185 | break; |
81cd0474 | 1186 | } |
81012e67 | 1187 | r2t_time = GetCountSspClk(); |
e3dc1e4c MHS |
1188 | //Signal tracer |
1189 | LED_C_ON(); | |
1e262141 | 1190 | |
81cd0474 | 1191 | // Okay, look at the command now. |
b67f7ec3 | 1192 | if(receivedCmd[0] == ICLASS_CMD_ACTALL ) { |
1e262141 | 1193 | // Reader in anticollission phase |
b67f7ec3 MHS |
1194 | modulated_response = resp_sof; modulated_response_size = resp_sof_Len; //order = 1; |
1195 | trace_data = sof_data; | |
1196 | trace_data_size = sizeof(sof_data); | |
1197 | } else if(receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { | |
1e262141 | 1198 | // Reader asks for anticollission CSN |
b67f7ec3 MHS |
1199 | modulated_response = resp_anticoll; modulated_response_size = resp_anticoll_len; //order = 2; |
1200 | trace_data = anticoll_data; | |
1201 | trace_data_size = sizeof(anticoll_data); | |
1e262141 | 1202 | //DbpString("Reader requests anticollission CSN:"); |
b67f7ec3 | 1203 | } else if(receivedCmd[0] == ICLASS_CMD_SELECT) { |
1e262141 | 1204 | // Reader selects anticollission CSN. |
1205 | // Tag sends the corresponding real CSN | |
b67f7ec3 MHS |
1206 | modulated_response = resp_csn; modulated_response_size = resp_csn_len; //order = 3; |
1207 | trace_data = csn_data; | |
1208 | trace_data_size = sizeof(csn_data); | |
1e262141 | 1209 | //DbpString("Reader selects anticollission CSN:"); |
b67f7ec3 | 1210 | } else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) { |
1e262141 | 1211 | // Read e-purse (88 02) |
b67f7ec3 MHS |
1212 | modulated_response = resp_cc; modulated_response_size = resp_cc_len; //order = 4; |
1213 | trace_data = card_challenge_data; | |
1214 | trace_data_size = sizeof(card_challenge_data); | |
1e262141 | 1215 | LED_B_ON(); |
b67f7ec3 | 1216 | } else if(receivedCmd[0] == ICLASS_CMD_CHECK) { |
1e262141 | 1217 | // Reader random and reader MAC!!! |
b67f7ec3 | 1218 | if(simulationMode == MODE_FULLSIM) |
61fe9073 MHS |
1219 | { |
1220 | //NR, from reader, is in receivedCmd +1 | |
1221 | opt_doTagMAC_2(cipher_state,receivedCmd+1,data_generic_trace,diversified_key); | |
1222 | ||
b19caaef | 1223 | trace_data = data_generic_trace; |
b67f7ec3 MHS |
1224 | trace_data_size = 4; |
1225 | CodeIClassTagAnswer(trace_data , trace_data_size); | |
1226 | memcpy(data_response, ToSend, ToSendMax); | |
1227 | modulated_response = data_response; | |
1228 | modulated_response_size = ToSendMax; | |
e5cd4ee4 | 1229 | response_delay = 0;//We need to hurry here... |
10a8875c | 1230 | //exitLoop = true; |
b67f7ec3 MHS |
1231 | }else |
1232 | { //Not fullsim, we don't respond | |
1233 | // We do not know what to answer, so lets keep quiet | |
1234 | modulated_response = resp_sof; modulated_response_size = 0; | |
1235 | trace_data = NULL; | |
1236 | trace_data_size = 0; | |
1237 | if (simulationMode == MODE_EXIT_AFTER_MAC){ | |
1238 | // dbprintf:ing ... | |
1239 | Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x" | |
1240 | ,csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]); | |
1241 | Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len, | |
1242 | receivedCmd[0], receivedCmd[1], receivedCmd[2], | |
1243 | receivedCmd[3], receivedCmd[4], receivedCmd[5], | |
1244 | receivedCmd[6], receivedCmd[7], receivedCmd[8]); | |
1245 | if (reader_mac_buf != NULL) | |
1246 | { | |
1247 | memcpy(reader_mac_buf,receivedCmd+1,8); | |
1248 | } | |
1249 | exitLoop = true; | |
9f6e9d15 | 1250 | } |
ff7bb4ef | 1251 | } |
b67f7ec3 MHS |
1252 | |
1253 | } else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { | |
1e262141 | 1254 | // Reader ends the session |
b67f7ec3 | 1255 | modulated_response = resp_sof; modulated_response_size = 0; //order = 0; |
55eaed8f MHS |
1256 | trace_data = NULL; |
1257 | trace_data_size = 0; | |
b67f7ec3 MHS |
1258 | } else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){ |
1259 | //Read block | |
1260 | uint16_t blk = receivedCmd[1]; | |
c8387e85 MHS |
1261 | //Take the data... |
1262 | memcpy(data_generic_trace, emulator+(blk << 3),8); | |
1263 | //Add crc | |
1264 | AppendCrc(data_generic_trace, 8); | |
1265 | trace_data = data_generic_trace; | |
1266 | trace_data_size = 10; | |
1267 | CodeIClassTagAnswer(trace_data , trace_data_size); | |
1268 | memcpy(data_response, ToSend, ToSendMax); | |
1269 | modulated_response = data_response; | |
1270 | modulated_response_size = ToSendMax; | |
1271 | }else if(receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM) | |
1272 | {//Probably the reader wants to update the nonce. Let's just ignore that for now. | |
1273 | // OBS! If this is implemented, don't forget to regenerate the cipher_state | |
1274 | //We're expected to respond with the data+crc, exactly what's already in the receivedcmd | |
1275 | //receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b| | |
1276 | ||
1277 | //Take the data... | |
1278 | memcpy(data_generic_trace, receivedCmd+2,8); | |
1279 | //Add crc | |
1280 | AppendCrc(data_generic_trace, 8); | |
1281 | trace_data = data_generic_trace; | |
1282 | trace_data_size = 10; | |
b67f7ec3 MHS |
1283 | CodeIClassTagAnswer(trace_data , trace_data_size); |
1284 | memcpy(data_response, ToSend, ToSendMax); | |
1285 | modulated_response = data_response; | |
1286 | modulated_response_size = ToSendMax; | |
1287 | } | |
b19caaef MHS |
1288 | else if(receivedCmd[0] == ICLASS_CMD_PAGESEL) |
1289 | {//Pagesel | |
1290 | //Pagesel enables to select a page in the selected chip memory and return its configuration block | |
1291 | //Chips with a single page will not answer to this command | |
1292 | // It appears we're fine ignoring this. | |
1293 | //Otherwise, we should answer 8bytes (block) + 2bytes CRC | |
1294 | } | |
b67f7ec3 | 1295 | else { |
17cba269 | 1296 | //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44 |
1e262141 | 1297 | // Never seen this command before |
1298 | Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", | |
1299 | len, | |
1300 | receivedCmd[0], receivedCmd[1], receivedCmd[2], | |
1301 | receivedCmd[3], receivedCmd[4], receivedCmd[5], | |
1302 | receivedCmd[6], receivedCmd[7], receivedCmd[8]); | |
1303 | // Do not respond | |
b67f7ec3 | 1304 | modulated_response = resp_sof; modulated_response_size = 0; //order = 0; |
55eaed8f MHS |
1305 | trace_data = NULL; |
1306 | trace_data_size = 0; | |
1e262141 | 1307 | } |
1308 | ||
81012e67 MHS |
1309 | if(cmdsRecvd > 100) { |
1310 | //DbpString("100 commands later..."); | |
9f6e9d15 | 1311 | //break; |
1e262141 | 1312 | } |
1313 | else { | |
1314 | cmdsRecvd++; | |
1315 | } | |
55eaed8f | 1316 | /** |
6b038d19 | 1317 | A legit tag has about 380us delay between reader EOT and tag SOF. |
55eaed8f MHS |
1318 | **/ |
1319 | if(modulated_response_size > 0) { | |
e5cd4ee4 | 1320 | SendIClassAnswer(modulated_response, modulated_response_size, response_delay); |
81012e67 | 1321 | t2r_time = GetCountSspClk(); |
81cd0474 | 1322 | } |
f83cc126 | 1323 | |
81cd0474 | 1324 | if (tracing) { |
6a1f2d82 | 1325 | uint8_t parity[MAX_PARITY_SIZE]; |
1326 | GetParity(receivedCmd, len, parity); | |
1327 | LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE); | |
17cba269 | 1328 | |
55eaed8f MHS |
1329 | if (trace_data != NULL) { |
1330 | GetParity(trace_data, trace_data_size, parity); | |
1331 | LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE); | |
17cba269 | 1332 | } |
81012e67 MHS |
1333 | if(!tracing) { |
1334 | DbpString("Trace full"); | |
1335 | //break; | |
1336 | } | |
1337 | ||
81cd0474 | 1338 | } |
81cd0474 | 1339 | } |
1e262141 | 1340 | |
9f6e9d15 | 1341 | //Dbprintf("%x", cmdsRecvd); |
1e262141 | 1342 | LED_A_OFF(); |
1343 | LED_B_OFF(); | |
7b941c8d MHS |
1344 | LED_C_OFF(); |
1345 | ||
f83cc126 MHS |
1346 | if(buttonPressed) |
1347 | { | |
1348 | DbpString("Button pressed"); | |
1349 | } | |
f83cc126 | 1350 | return buttonPressed; |
1e262141 | 1351 | } |
1352 | ||
1353 | static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) | |
1354 | { | |
e3dc1e4c | 1355 | int i = 0, d=0;//, u = 0, d = 0; |
1e262141 | 1356 | uint8_t b = 0; |
e3dc1e4c | 1357 | |
645c960f MHS |
1358 | //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K); |
1359 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K_8BIT); | |
e3dc1e4c | 1360 | |
1e262141 | 1361 | AT91C_BASE_SSC->SSC_THR = 0x00; |
1362 | FpgaSetupSsc(); | |
e3dc1e4c MHS |
1363 | while(!BUTTON_PRESS()) { |
1364 | if((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){ | |
1365 | b = AT91C_BASE_SSC->SSC_RHR; (void) b; | |
1e262141 | 1366 | } |
e3dc1e4c MHS |
1367 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){ |
1368 | b = 0x00; | |
1e262141 | 1369 | if(d < delay) { |
1e262141 | 1370 | d++; |
1371 | } | |
e3dc1e4c MHS |
1372 | else { |
1373 | if( i < respLen){ | |
1374 | b = resp[i]; | |
1375 | //Hack | |
1376 | //b = 0xAC; | |
1377 | } | |
1378 | i++; | |
1e262141 | 1379 | } |
1380 | AT91C_BASE_SSC->SSC_THR = b; | |
1e262141 | 1381 | } |
e3dc1e4c | 1382 | |
645c960f MHS |
1383 | // if (i > respLen +4) break; |
1384 | if (i > respLen +1) break; | |
1e262141 | 1385 | } |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /// THE READER CODE | |
1391 | ||
1392 | //----------------------------------------------------------------------------- | |
1393 | // Transmit the command (to the tag) that was placed in ToSend[]. | |
1394 | //----------------------------------------------------------------------------- | |
1395 | static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) | |
1396 | { | |
1397 | int c; | |
1e262141 | 1398 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); |
1399 | AT91C_BASE_SSC->SSC_THR = 0x00; | |
1400 | FpgaSetupSsc(); | |
1401 | ||
1402 | if (wait) | |
2ed270a8 MHS |
1403 | { |
1404 | if(*wait < 10) *wait = 10; | |
1405 | ||
1406 | for(c = 0; c < *wait;) { | |
1407 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1408 | AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! | |
1409 | c++; | |
1410 | } | |
1411 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1412 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1413 | (void)r; | |
1414 | } | |
1415 | WDT_HIT(); | |
1416 | } | |
1417 | ||
1418 | } | |
1e262141 | 1419 | |
1e262141 | 1420 | |
1421 | uint8_t sendbyte; | |
1422 | bool firstpart = TRUE; | |
1423 | c = 0; | |
1424 | for(;;) { | |
1425 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1426 | ||
1427 | // DOUBLE THE SAMPLES! | |
1428 | if(firstpart) { | |
1429 | sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); | |
1430 | } | |
1431 | else { | |
1432 | sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); | |
1433 | c++; | |
1434 | } | |
1435 | if(sendbyte == 0xff) { | |
1436 | sendbyte = 0xfe; | |
1437 | } | |
1438 | AT91C_BASE_SSC->SSC_THR = sendbyte; | |
1439 | firstpart = !firstpart; | |
1440 | ||
1441 | if(c >= len) { | |
1442 | break; | |
1443 | } | |
1444 | } | |
1445 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1446 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1447 | (void)r; | |
1448 | } | |
1449 | WDT_HIT(); | |
1450 | } | |
e7707cdb | 1451 | if (samples && wait) *samples = (c + *wait) << 3; |
1e262141 | 1452 | } |
1453 | ||
1454 | ||
1455 | //----------------------------------------------------------------------------- | |
1456 | // Prepare iClass reader command to send to FPGA | |
1457 | //----------------------------------------------------------------------------- | |
1458 | void CodeIClassCommand(const uint8_t * cmd, int len) | |
1459 | { | |
1460 | int i, j, k; | |
1461 | uint8_t b; | |
1462 | ||
1463 | ToSendReset(); | |
1464 | ||
1465 | // Start of Communication: 1 out of 4 | |
1466 | ToSend[++ToSendMax] = 0xf0; | |
1467 | ToSend[++ToSendMax] = 0x00; | |
1468 | ToSend[++ToSendMax] = 0x0f; | |
1469 | ToSend[++ToSendMax] = 0x00; | |
1470 | ||
1471 | // Modulate the bytes | |
1472 | for (i = 0; i < len; i++) { | |
1473 | b = cmd[i]; | |
1474 | for(j = 0; j < 4; j++) { | |
1475 | for(k = 0; k < 4; k++) { | |
e3dc1e4c | 1476 | if(k == (b & 3)) { |
671ff89f | 1477 | ToSend[++ToSendMax] = 0xf0; |
e3dc1e4c MHS |
1478 | } |
1479 | else { | |
1480 | ToSend[++ToSendMax] = 0x00; | |
1481 | } | |
1e262141 | 1482 | } |
1483 | b >>= 2; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | // End of Communication | |
1488 | ToSend[++ToSendMax] = 0x00; | |
1489 | ToSend[++ToSendMax] = 0x00; | |
1490 | ToSend[++ToSendMax] = 0xf0; | |
1491 | ToSend[++ToSendMax] = 0x00; | |
1492 | ||
1493 | // Convert from last character reference to length | |
1494 | ToSendMax++; | |
1495 | } | |
1496 | ||
1497 | void ReaderTransmitIClass(uint8_t* frame, int len) | |
1498 | { | |
6a1f2d82 | 1499 | int wait = 0; |
1500 | int samples = 0; | |
1501 | ||
1502 | // This is tied to other size changes | |
6a1f2d82 | 1503 | CodeIClassCommand(frame,len); |
1504 | ||
1505 | // Select the card | |
1506 | TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait); | |
1507 | if(trigger) | |
1508 | LED_A_ON(); | |
1509 | ||
1510 | // Store reader command in buffer | |
1511 | if (tracing) { | |
1512 | uint8_t par[MAX_PARITY_SIZE]; | |
1513 | GetParity(frame, len, par); | |
1514 | LogTrace(frame, len, rsamples, rsamples, par, TRUE); | |
1515 | } | |
1e262141 | 1516 | } |
1517 | ||
1518 | //----------------------------------------------------------------------------- | |
1519 | // Wait a certain time for tag response | |
1520 | // If a response is captured return TRUE | |
1521 | // If it takes too long return FALSE | |
1522 | //----------------------------------------------------------------------------- | |
1523 | static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer | |
1524 | { | |
1525 | // buffer needs to be 512 bytes | |
1526 | int c; | |
1527 | ||
1528 | // Set FPGA mode to "reader listen mode", no modulation (listen | |
1529 | // only, since we are receiving, not transmitting). | |
1530 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); | |
1531 | ||
1532 | // Now get the answer from the card | |
1533 | Demod.output = receivedResponse; | |
1534 | Demod.len = 0; | |
1535 | Demod.state = DEMOD_UNSYNCD; | |
1536 | ||
1537 | uint8_t b; | |
1538 | if (elapsed) *elapsed = 0; | |
1539 | ||
1540 | bool skip = FALSE; | |
1541 | ||
1542 | c = 0; | |
1543 | for(;;) { | |
1544 | WDT_HIT(); | |
1545 | ||
1546 | if(BUTTON_PRESS()) return FALSE; | |
1547 | ||
1548 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1549 | AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! | |
1550 | if (elapsed) (*elapsed)++; | |
1551 | } | |
1552 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1553 | if(c < timeout) { c++; } else { return FALSE; } | |
1554 | b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; | |
1555 | skip = !skip; | |
1556 | if(skip) continue; | |
3fe4ff4f | 1557 | |
1e262141 | 1558 | if(ManchesterDecoding(b & 0x0f)) { |
1559 | *samples = c << 3; | |
1560 | return TRUE; | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | } | |
1565 | ||
1566 | int ReaderReceiveIClass(uint8_t* receivedAnswer) | |
1567 | { | |
1568 | int samples = 0; | |
1569 | if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE; | |
7bc95e2e | 1570 | rsamples += samples; |
6a1f2d82 | 1571 | if (tracing) { |
1572 | uint8_t parity[MAX_PARITY_SIZE]; | |
1573 | GetParity(receivedAnswer, Demod.len, parity); | |
1574 | LogTrace(receivedAnswer,Demod.len,rsamples,rsamples,parity,FALSE); | |
1575 | } | |
1e262141 | 1576 | if(samples == 0) return FALSE; |
1577 | return Demod.len; | |
1578 | } | |
1579 | ||
aa41c605 MHS |
1580 | void setupIclassReader() |
1581 | { | |
1582 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
1583 | // Reset trace buffer | |
671ff89f | 1584 | set_tracing(TRUE); |
1585 | clear_trace(); | |
aa41c605 MHS |
1586 | |
1587 | // Setup SSC | |
1588 | FpgaSetupSsc(); | |
1589 | // Start from off (no field generated) | |
1590 | // Signal field is off with the appropriate LED | |
1591 | LED_D_OFF(); | |
1592 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1593 | SpinDelay(200); | |
1594 | ||
1595 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1596 | ||
1597 | // Now give it time to spin up. | |
1598 | // Signal field is on with the appropriate LED | |
1599 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1600 | SpinDelay(200); | |
1601 | LED_A_ON(); | |
1602 | ||
1603 | } | |
1604 | ||
aa53efc3 | 1605 | bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) |
c8dd9b09 MHS |
1606 | { |
1607 | while(retries-- > 0) | |
1608 | { | |
1609 | ReaderTransmitIClass(command, cmdsize); | |
1610 | if(expected_size == ReaderReceiveIClass(resp)){ | |
aa53efc3 | 1611 | return true; |
c8dd9b09 MHS |
1612 | } |
1613 | } | |
aa53efc3 | 1614 | return false;//Error |
c8dd9b09 MHS |
1615 | } |
1616 | ||
1617 | /** | |
1618 | * @brief Talks to an iclass tag, sends the commands to get CSN and CC. | |
1619 | * @param card_data where the CSN and CC are stored for return | |
1620 | * @return 0 = fail | |
1621 | * 1 = Got CSN | |
1622 | * 2 = Got CSN and CC | |
1623 | */ | |
aa53efc3 | 1624 | uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) |
c8dd9b09 MHS |
1625 | { |
1626 | static uint8_t act_all[] = { 0x0a }; | |
aa53efc3 | 1627 | //static uint8_t identify[] = { 0x0c }; |
1628 | static uint8_t identify[] = { 0x0c, 0x00, 0x73, 0x33 }; | |
c8dd9b09 | 1629 | static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
aa53efc3 | 1630 | static uint8_t readcheck_cc[]= { 0x88, 0x02 }; |
1631 | if (use_credit_key) | |
1632 | readcheck_cc[0] = 0x18; | |
1633 | else | |
1634 | readcheck_cc[0] = 0x88; | |
caaf9618 | 1635 | |
f71f4deb | 1636 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
c8dd9b09 MHS |
1637 | |
1638 | uint8_t read_status = 0; | |
1639 | ||
1640 | // Send act_all | |
1641 | ReaderTransmitIClass(act_all, 1); | |
1642 | // Card present? | |
1643 | if(!ReaderReceiveIClass(resp)) return read_status;//Fail | |
1644 | //Send Identify | |
1645 | ReaderTransmitIClass(identify, 1); | |
1646 | //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC | |
1647 | uint8_t len = ReaderReceiveIClass(resp); | |
1648 | if(len != 10) return read_status;//Fail | |
1649 | ||
1650 | //Copy the Anti-collision CSN to our select-packet | |
1651 | memcpy(&select[1],resp,8); | |
1652 | //Select the card | |
1653 | ReaderTransmitIClass(select, sizeof(select)); | |
1654 | //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC | |
1655 | len = ReaderReceiveIClass(resp); | |
1656 | if(len != 10) return read_status;//Fail | |
1657 | ||
1658 | //Success - level 1, we got CSN | |
1659 | //Save CSN in response data | |
1660 | memcpy(card_data,resp,8); | |
1661 | ||
1662 | //Flag that we got to at least stage 1, read CSN | |
1663 | read_status = 1; | |
1664 | ||
34e2af02 | 1665 | // Card selected, now read e-purse (cc) (only 8 bytes no CRC) |
c8dd9b09 MHS |
1666 | ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); |
1667 | if(ReaderReceiveIClass(resp) == 8) { | |
1668 | //Save CC (e-purse) in response data | |
1669 | memcpy(card_data+8,resp,8); | |
caaf9618 | 1670 | read_status++; |
c8dd9b09 MHS |
1671 | } |
1672 | ||
1673 | return read_status; | |
1674 | } | |
671ff89f | 1675 | uint8_t handshakeIclassTag(uint8_t *card_data) { |
aa53efc3 | 1676 | return handshakeIclassTag_ext(card_data, false); |
1677 | } | |
c8dd9b09 | 1678 | |
caaf9618 | 1679 | |
1e262141 | 1680 | // Reader iClass Anticollission |
1681 | void ReaderIClass(uint8_t arg0) { | |
1e262141 | 1682 | |
83602aff MHS |
1683 | uint8_t card_data[6 * 8]={0}; |
1684 | memset(card_data, 0xFF, sizeof(card_data)); | |
979c7655 | 1685 | uint8_t last_csn[8]={0,0,0,0,0,0,0,0}; |
34e2af02 | 1686 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
1687 | memset(resp, 0xFF, sizeof(resp)); | |
caaf9618 MHS |
1688 | //Read conf block CRC(0x01) => 0xfa 0x22 |
1689 | uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x01, 0xfa, 0x22}; | |
34e2af02 | 1690 | //Read App Issuer Area block CRC(0x05) => 0xde 0x64 |
caaf9618 MHS |
1691 | uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY,0x05, 0xde, 0x64}; |
1692 | ||
6ce0e538 | 1693 | int read_status= 0; |
caaf9618 | 1694 | uint8_t result_status = 0; |
34e2af02 | 1695 | // flag to read until one tag is found successfully |
6ce0e538 | 1696 | bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; |
34e2af02 | 1697 | // flag to only try 5 times to find one tag then return |
6ce0e538 | 1698 | bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; |
34e2af02 | 1699 | // if neither abort_after_read nor try_once then continue reading until button pressed. |
1700 | ||
1701 | bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY; | |
1702 | // test flags for what blocks to be sure to read | |
1703 | uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF; | |
1704 | uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC; | |
1705 | uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA; | |
1706 | ||
1707 | set_tracing(true); | |
6ce0e538 | 1708 | setupIclassReader(); |
1e262141 | 1709 | |
6ce0e538 | 1710 | uint16_t tryCnt=0; |
979c7655 | 1711 | bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); |
1712 | while(!userCancelled) | |
6ce0e538 | 1713 | { |
979c7655 | 1714 | // if only looking for one card try 2 times if we missed it the first time |
1715 | if (try_once && tryCnt > 2) break; | |
6ce0e538 | 1716 | tryCnt++; |
3000dc4e | 1717 | if(!tracing) { |
c8dd9b09 MHS |
1718 | DbpString("Trace full"); |
1719 | break; | |
1720 | } | |
1721 | WDT_HIT(); | |
4ab4336a | 1722 | |
aa53efc3 | 1723 | read_status = handshakeIclassTag_ext(card_data, use_credit_key); |
2e9d4b3f | 1724 | |
c8dd9b09 | 1725 | if(read_status == 0) continue; |
caaf9618 MHS |
1726 | if(read_status == 1) result_status = FLAG_ICLASS_READER_CSN; |
1727 | if(read_status == 2) result_status = FLAG_ICLASS_READER_CSN|FLAG_ICLASS_READER_CC; | |
1728 | ||
1729 | // handshakeIclass returns CSN|CC, but the actual block | |
1730 | // layout is CSN|CONFIG|CC, so here we reorder the data, | |
1731 | // moving CC forward 8 bytes | |
1732 | memcpy(card_data+16,card_data+8, 8); | |
1733 | //Read block 1, config | |
34e2af02 | 1734 | if(flagReadConfig) { |
1735 | if(sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10)) | |
caaf9618 MHS |
1736 | { |
1737 | result_status |= FLAG_ICLASS_READER_CONF; | |
34e2af02 | 1738 | memcpy(card_data+8, resp, 8); |
aa53efc3 | 1739 | } else { |
1740 | Dbprintf("Failed to dump config block"); | |
caaf9618 MHS |
1741 | } |
1742 | } | |
c8dd9b09 | 1743 | |
caaf9618 | 1744 | //Read block 5, AA |
34e2af02 | 1745 | if(flagReadAA) { |
1746 | if(sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) | |
caaf9618 | 1747 | { |
caaf9618 | 1748 | result_status |= FLAG_ICLASS_READER_AA; |
34e2af02 | 1749 | memcpy(card_data+(8*5), resp, 8); |
aa53efc3 | 1750 | } else { |
1751 | //Dbprintf("Failed to dump AA block"); | |
caaf9618 MHS |
1752 | } |
1753 | } | |
1754 | ||
1755 | // 0 : CSN | |
b67f7ec3 | 1756 | // 1 : Configuration |
caaf9618 MHS |
1757 | // 2 : e-purse |
1758 | // (3,4 write-only, kc and kd) | |
b67f7ec3 MHS |
1759 | // 5 Application issuer area |
1760 | // | |
34e2af02 | 1761 | //Then we can 'ship' back the 8 * 6 bytes of data, |
b67f7ec3 MHS |
1762 | // with 0xFF:s in block 3 and 4. |
1763 | ||
c8dd9b09 | 1764 | LED_B_ON(); |
979c7655 | 1765 | //Send back to client, but don't bother if we already sent this - |
1766 | // only useful if looping in arm (not try_once && not abort_after_read) | |
c8dd9b09 MHS |
1767 | if(memcmp(last_csn, card_data, 8) != 0) |
1768 | { | |
34e2af02 | 1769 | // If caller requires that we get Conf, CC, AA, continue until we got it |
1770 | if( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) { | |
caaf9618 | 1771 | cmd_send(CMD_ACK,result_status,0,0,card_data,sizeof(card_data)); |
c8dd9b09 MHS |
1772 | if(abort_after_read) { |
1773 | LED_A_OFF(); | |
979c7655 | 1774 | LED_B_OFF(); |
c8dd9b09 MHS |
1775 | return; |
1776 | } | |
1777 | //Save that we already sent this.... | |
1778 | memcpy(last_csn, card_data, 8); | |
1779 | } | |
caaf9618 | 1780 | |
c8dd9b09 MHS |
1781 | } |
1782 | LED_B_OFF(); | |
979c7655 | 1783 | userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); |
1784 | } | |
1785 | if (userCancelled) { | |
1786 | cmd_send(CMD_ACK,0xFF,0,0,card_data, 0); | |
1787 | } else { | |
1788 | cmd_send(CMD_ACK,0,0,0,card_data, 0); | |
6ce0e538 | 1789 | } |
3ac22ee1 | 1790 | LED_A_OFF(); |
cee5a30d | 1791 | } |
1792 | ||
c3963755 | 1793 | void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { |
c8dd9b09 | 1794 | |
cb29e00a | 1795 | uint8_t card_data[USB_CMD_DATA_SIZE]={0}; |
39d3ce5d MHS |
1796 | uint16_t block_crc_LUT[255] = {0}; |
1797 | ||
1798 | {//Generate a lookup table for block crc | |
1799 | for(int block = 0; block < 255; block++){ | |
1800 | char bl = block; | |
1801 | block_crc_LUT[block] = iclass_crc16(&bl ,1); | |
1802 | } | |
1803 | } | |
1804 | //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]); | |
c8dd9b09 | 1805 | |
c3963755 | 1806 | uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
1807 | uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; | |
1808 | ||
fecd8202 | 1809 | uint16_t crc = 0; |
c3963755 | 1810 | uint8_t cardsize=0; |
c3963755 | 1811 | uint8_t mem=0; |
1812 | ||
1813 | static struct memory_t{ | |
1814 | int k16; | |
1815 | int book; | |
1816 | int k2; | |
1817 | int lockauth; | |
1818 | int keyaccess; | |
1819 | } memory; | |
1820 | ||
f71f4deb | 1821 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
6a1f2d82 | 1822 | |
9b82de75 | 1823 | setupIclassReader(); |
3000dc4e | 1824 | set_tracing(TRUE); |
c3963755 | 1825 | |
c8dd9b09 | 1826 | while(!BUTTON_PRESS()) { |
c3963755 | 1827 | |
39d3ce5d MHS |
1828 | WDT_HIT(); |
1829 | ||
3000dc4e | 1830 | if(!tracing) { |
c3963755 | 1831 | DbpString("Trace full"); |
1832 | break; | |
1833 | } | |
1834 | ||
c8dd9b09 MHS |
1835 | uint8_t read_status = handshakeIclassTag(card_data); |
1836 | if(read_status < 2) continue; | |
1837 | ||
1838 | //for now replay captured auth (as cc not updated) | |
1839 | memcpy(check+5,MAC,4); | |
1840 | ||
aa53efc3 | 1841 | if(!sendCmdGetResponseWithRetries(check, sizeof(check),resp, 4, 5)) |
c8dd9b09 MHS |
1842 | { |
1843 | Dbprintf("Error: Authentication Fail!"); | |
1844 | continue; | |
1845 | } | |
1846 | ||
39d3ce5d MHS |
1847 | //first get configuration block (block 1) |
1848 | crc = block_crc_LUT[1]; | |
c8dd9b09 | 1849 | read[1]=1; |
c8dd9b09 MHS |
1850 | read[2] = crc >> 8; |
1851 | read[3] = crc & 0xff; | |
1852 | ||
aa53efc3 | 1853 | if(!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) |
c8dd9b09 | 1854 | { |
39d3ce5d | 1855 | Dbprintf("Dump config (block 1) failed"); |
c8dd9b09 MHS |
1856 | continue; |
1857 | } | |
1858 | ||
1859 | mem=resp[5]; | |
1860 | memory.k16= (mem & 0x80); | |
1861 | memory.book= (mem & 0x20); | |
1862 | memory.k2= (mem & 0x8); | |
1863 | memory.lockauth= (mem & 0x2); | |
1864 | memory.keyaccess= (mem & 0x1); | |
1865 | ||
1866 | cardsize = memory.k16 ? 255 : 32; | |
1867 | WDT_HIT(); | |
cb29e00a MHS |
1868 | //Set card_data to all zeroes, we'll fill it with data |
1869 | memset(card_data,0x0,USB_CMD_DATA_SIZE); | |
1870 | uint8_t failedRead =0; | |
428d6221 | 1871 | uint32_t stored_data_length =0; |
c8dd9b09 | 1872 | //then loop around remaining blocks |
39d3ce5d | 1873 | for(int block=0; block < cardsize; block++){ |
c8dd9b09 MHS |
1874 | |
1875 | read[1]= block; | |
39d3ce5d | 1876 | crc = block_crc_LUT[block]; |
c8dd9b09 MHS |
1877 | read[2] = crc >> 8; |
1878 | read[3] = crc & 0xff; | |
1879 | ||
aa53efc3 | 1880 | if(sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) |
c8dd9b09 MHS |
1881 | { |
1882 | Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", | |
1883 | block, resp[0], resp[1], resp[2], | |
1884 | resp[3], resp[4], resp[5], | |
1885 | resp[6], resp[7]); | |
1886 | ||
cb29e00a MHS |
1887 | //Fill up the buffer |
1888 | memcpy(card_data+stored_data_length,resp,8); | |
1889 | stored_data_length += 8; | |
cb29e00a MHS |
1890 | if(stored_data_length +8 > USB_CMD_DATA_SIZE) |
1891 | {//Time to send this off and start afresh | |
1892 | cmd_send(CMD_ACK, | |
1893 | stored_data_length,//data length | |
1894 | failedRead,//Failed blocks? | |
1895 | 0,//Not used ATM | |
1896 | card_data, stored_data_length); | |
1897 | //reset | |
1898 | stored_data_length = 0; | |
1899 | failedRead = 0; | |
1900 | } | |
1901 | ||
c8dd9b09 | 1902 | }else{ |
cb29e00a MHS |
1903 | failedRead = 1; |
1904 | stored_data_length +=8;//Otherwise, data becomes misaligned | |
c8dd9b09 | 1905 | Dbprintf("Failed to dump block %d", block); |
c3963755 | 1906 | } |
1907 | } | |
428d6221 | 1908 | |
cb29e00a MHS |
1909 | //Send off any remaining data |
1910 | if(stored_data_length > 0) | |
1911 | { | |
1912 | cmd_send(CMD_ACK, | |
1913 | stored_data_length,//data length | |
1914 | failedRead,//Failed blocks? | |
1915 | 0,//Not used ATM | |
1916 | card_data, stored_data_length); | |
1917 | } | |
c8dd9b09 MHS |
1918 | //If we got here, let's break |
1919 | break; | |
c3963755 | 1920 | } |
cb29e00a MHS |
1921 | //Signal end of transmission |
1922 | cmd_send(CMD_ACK, | |
1923 | 0,//data length | |
1924 | 0,//Failed blocks? | |
1925 | 0,//Not used ATM | |
1926 | card_data, 0); | |
1927 | ||
c3963755 | 1928 | LED_A_OFF(); |
1929 | } | |
1930 | ||
3ac22ee1 | 1931 | void iClass_ReadCheck(uint8_t blockNo, uint8_t keyType) { |
1932 | uint8_t readcheck[] = { keyType, blockNo }; | |
1933 | uint8_t resp[] = {0,0,0,0,0,0,0,0}; | |
1934 | size_t isOK = 0; | |
1935 | isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 6); | |
1936 | cmd_send(CMD_ACK,isOK,0,0,0,0); | |
1937 | } | |
1938 | ||
aa53efc3 | 1939 | void iClass_Authentication(uint8_t *MAC) { |
3ac22ee1 | 1940 | uint8_t check[] = { ICLASS_CMD_CHECK, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
aa53efc3 | 1941 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
1942 | memcpy(check+5,MAC,4); | |
1943 | bool isOK; | |
3ac22ee1 | 1944 | isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6); |
aa53efc3 | 1945 | cmd_send(CMD_ACK,isOK,0,0,0,0); |
aa53efc3 | 1946 | } |
3ac22ee1 | 1947 | bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { |
1948 | uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C? | |
1949 | char bl = blockNo; | |
1950 | uint16_t rdCrc = iclass_crc16(&bl, 1); | |
1951 | readcmd[2] = rdCrc >> 8; | |
1952 | readcmd[3] = rdCrc & 0xff; | |
1953 | uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; | |
1954 | bool isOK = false; | |
912a3e94 | 1955 | |
3ac22ee1 | 1956 | //readcmd[1] = blockNo; |
1957 | isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10); | |
1958 | memcpy(readdata, resp, sizeof(resp)); | |
fecd8202 | 1959 | |
aa53efc3 | 1960 | return isOK; |
1961 | } | |
fecd8202 | 1962 | |
3ac22ee1 | 1963 | void iClass_ReadBlk(uint8_t blockno) { |
1964 | uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; | |
aa53efc3 | 1965 | bool isOK = false; |
3ac22ee1 | 1966 | isOK = iClass_ReadBlock(blockno, readblockdata); |
1967 | cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); | |
aa53efc3 | 1968 | } |
fecd8202 | 1969 | |
3ac22ee1 | 1970 | void iClass_Dump(uint8_t blockno, uint8_t numblks) { |
1971 | uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; | |
aa53efc3 | 1972 | bool isOK = false; |
1973 | uint8_t blkCnt = 0; | |
fecd8202 | 1974 | |
aa53efc3 | 1975 | BigBuf_free(); |
1976 | uint8_t *dataout = BigBuf_malloc(255*8); | |
aa53efc3 | 1977 | if (dataout == NULL){ |
1978 | Dbprintf("out of memory"); | |
1979 | OnError(1); | |
1980 | return; | |
1981 | } | |
3ac22ee1 | 1982 | memset(dataout,0xFF,255*8); |
fecd8202 | 1983 | |
aa53efc3 | 1984 | for (;blkCnt < numblks; blkCnt++) { |
3ac22ee1 | 1985 | isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); |
1986 | if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again | |
1987 | isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); | |
aa53efc3 | 1988 | if (!isOK) { |
1989 | Dbprintf("Block %02X failed to read", blkCnt+blockno); | |
1990 | break; | |
1991 | } | |
fecd8202 | 1992 | } |
aa53efc3 | 1993 | memcpy(dataout+(blkCnt*8),readblockdata,8); |
aa53efc3 | 1994 | } |
1995 | //return pointer to dump memory in arg3 | |
1996 | cmd_send(CMD_ACK,isOK,blkCnt,BigBuf_max_traceLen(),0,0); | |
1997 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1998 | LEDsoff(); | |
1999 | BigBuf_free(); | |
2000 | } | |
2001 | ||
3ac22ee1 | 2002 | bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { |
671ff89f | 2003 | uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
3ac22ee1 | 2004 | //uint8_t readblockdata[10]; |
2005 | //write[1] = blockNo; | |
aa53efc3 | 2006 | memcpy(write+2, data, 12); // data + mac |
671ff89f | 2007 | char *wrCmd = (char *)(write+1); |
2008 | uint16_t wrCrc = iclass_crc16(wrCmd, 13); | |
2009 | write[14] = wrCrc >> 8; | |
2010 | write[15] = wrCrc & 0xff; | |
3ac22ee1 | 2011 | uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; |
671ff89f | 2012 | bool isOK = false; |
2013 | ||
3ac22ee1 | 2014 | isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10); |
671ff89f | 2015 | if (isOK) { //if reader responded correctly |
3ac22ee1 | 2016 | //Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]); |
671ff89f | 2017 | if (memcmp(write+2,resp,8)) { //if response is not equal to write values |
2018 | if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data) | |
2019 | //error try again | |
2020 | isOK = sendCmdGetResponseWithRetries(write,sizeof(write),resp,sizeof(resp),10); | |
2021 | } | |
2022 | ||
fecd8202 | 2023 | } |
fecd8202 | 2024 | } |
aa53efc3 | 2025 | return isOK; |
2026 | } | |
2027 | ||
3ac22ee1 | 2028 | void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) { |
2029 | bool isOK = iClass_WriteBlock_ext(blockNo, data); | |
aa53efc3 | 2030 | if (isOK){ |
2031 | Dbprintf("Write block [%02x] successful",blockNo); | |
2032 | } else { | |
2033 | Dbprintf("Write block [%02x] failed",blockNo); | |
2034 | } | |
2035 | cmd_send(CMD_ACK,isOK,0,0,0,0); | |
2036 | } | |
2037 | ||
3ac22ee1 | 2038 | void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { |
aa53efc3 | 2039 | int i; |
2040 | int written = 0; | |
2041 | int total_block = (endblock - startblock) + 1; | |
2042 | for (i = 0; i < total_block;i++){ | |
2043 | // block number | |
3ac22ee1 | 2044 | if (iClass_WriteBlock_ext(i+startblock, data+(i*12))){ |
aa53efc3 | 2045 | Dbprintf("Write block [%02x] successful",i + startblock); |
2046 | written++; | |
2047 | } else { | |
3ac22ee1 | 2048 | if (iClass_WriteBlock_ext(i+startblock, data+(i*12))){ |
aa53efc3 | 2049 | Dbprintf("Write block [%02x] successful",i + startblock); |
2050 | written++; | |
2051 | } else { | |
2052 | Dbprintf("Write block [%02x] failed",i + startblock); | |
2053 | } | |
2054 | } | |
2055 | } | |
2056 | if (written == total_block) | |
2057 | Dbprintf("Clone complete"); | |
2058 | else | |
2059 | Dbprintf("Clone incomplete"); | |
2060 | ||
2061 | cmd_send(CMD_ACK,1,0,0,0,0); | |
2062 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2063 | LEDsoff(); | |
2064 | } |