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1 | //----------------------------------------------------------------------------- | |
2 | // Merlok - June 2011 | |
3 | // Gerhard de Koning Gans - May 2008 | |
4 | // Hagen Fritsch - June 2010 | |
5 | // | |
6 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, | |
7 | // at your option, any later version. See the LICENSE.txt file for the text of | |
8 | // the license. | |
9 | //----------------------------------------------------------------------------- | |
10 | // Routines to support ISO 14443 type A. | |
11 | //----------------------------------------------------------------------------- | |
12 | ||
13 | #include "proxmark3.h" | |
14 | #include "apps.h" | |
15 | #include "util.h" | |
16 | #include "string.h" | |
17 | ||
18 | #include "iso14443crc.h" | |
19 | #include "iso14443a.h" | |
20 | #include "crapto1.h" | |
21 | #include "mifareutil.h" | |
22 | ||
23 | static uint8_t *trace = (uint8_t *) BigBuf; | |
24 | static int traceLen = 0; | |
25 | static int rsamples = 0; | |
26 | static int tracing = TRUE; | |
27 | static uint32_t iso14a_timeout; | |
28 | ||
29 | // CARD TO READER | |
30 | // Sequence D: 11110000 modulation with subcarrier during first half | |
31 | // Sequence E: 00001111 modulation with subcarrier during second half | |
32 | // Sequence F: 00000000 no modulation with subcarrier | |
33 | // READER TO CARD | |
34 | // Sequence X: 00001100 drop after half a period | |
35 | // Sequence Y: 00000000 no drop | |
36 | // Sequence Z: 11000000 drop at start | |
37 | #define SEC_D 0xf0 | |
38 | #define SEC_E 0x0f | |
39 | #define SEC_F 0x00 | |
40 | #define SEC_X 0x0c | |
41 | #define SEC_Y 0x00 | |
42 | #define SEC_Z 0xc0 | |
43 | ||
44 | static const uint8_t OddByteParity[256] = { | |
45 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
46 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
47 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
48 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
49 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
50 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
51 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
52 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
53 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
54 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
55 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
56 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
57 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, | |
58 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
59 | 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, | |
60 | 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1 | |
61 | }; | |
62 | ||
63 | // BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT | |
64 | #define RECV_CMD_OFFSET 3032 | |
65 | #define RECV_RES_OFFSET 3096 | |
66 | #define DMA_BUFFER_OFFSET 3160 | |
67 | #define DMA_BUFFER_SIZE 4096 | |
68 | #define TRACE_LENGTH 3000 | |
69 | ||
70 | uint8_t trigger = 0; | |
71 | void iso14a_set_trigger(int enable) { | |
72 | trigger = enable; | |
73 | } | |
74 | ||
75 | //----------------------------------------------------------------------------- | |
76 | // Generate the parity value for a byte sequence | |
77 | // | |
78 | //----------------------------------------------------------------------------- | |
79 | byte_t oddparity (const byte_t bt) | |
80 | { | |
81 | return OddByteParity[bt]; | |
82 | } | |
83 | ||
84 | uint32_t GetParity(const uint8_t * pbtCmd, int iLen) | |
85 | { | |
86 | int i; | |
87 | uint32_t dwPar = 0; | |
88 | ||
89 | // Generate the encrypted data | |
90 | for (i = 0; i < iLen; i++) { | |
91 | // Save the encrypted parity bit | |
92 | dwPar |= ((OddByteParity[pbtCmd[i]]) << i); | |
93 | } | |
94 | return dwPar; | |
95 | } | |
96 | ||
97 | void AppendCrc14443a(uint8_t* data, int len) | |
98 | { | |
99 | ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1); | |
100 | } | |
101 | ||
102 | int LogTrace(const uint8_t * btBytes, int iLen, int iSamples, uint32_t dwParity, int bReader) | |
103 | { | |
104 | // Return when trace is full | |
105 | if (traceLen >= TRACE_LENGTH) return FALSE; | |
106 | ||
107 | // Trace the random, i'm curious | |
108 | rsamples += iSamples; | |
109 | trace[traceLen++] = ((rsamples >> 0) & 0xff); | |
110 | trace[traceLen++] = ((rsamples >> 8) & 0xff); | |
111 | trace[traceLen++] = ((rsamples >> 16) & 0xff); | |
112 | trace[traceLen++] = ((rsamples >> 24) & 0xff); | |
113 | if (!bReader) { | |
114 | trace[traceLen - 1] |= 0x80; | |
115 | } | |
116 | trace[traceLen++] = ((dwParity >> 0) & 0xff); | |
117 | trace[traceLen++] = ((dwParity >> 8) & 0xff); | |
118 | trace[traceLen++] = ((dwParity >> 16) & 0xff); | |
119 | trace[traceLen++] = ((dwParity >> 24) & 0xff); | |
120 | trace[traceLen++] = iLen; | |
121 | memcpy(trace + traceLen, btBytes, iLen); | |
122 | traceLen += iLen; | |
123 | return TRUE; | |
124 | } | |
125 | ||
126 | //----------------------------------------------------------------------------- | |
127 | // The software UART that receives commands from the reader, and its state | |
128 | // variables. | |
129 | //----------------------------------------------------------------------------- | |
130 | static struct { | |
131 | enum { | |
132 | STATE_UNSYNCD, | |
133 | STATE_START_OF_COMMUNICATION, | |
134 | STATE_MILLER_X, | |
135 | STATE_MILLER_Y, | |
136 | STATE_MILLER_Z, | |
137 | STATE_ERROR_WAIT | |
138 | } state; | |
139 | uint16_t shiftReg; | |
140 | int bitCnt; | |
141 | int byteCnt; | |
142 | int byteCntMax; | |
143 | int posCnt; | |
144 | int syncBit; | |
145 | int parityBits; | |
146 | int samples; | |
147 | int highCnt; | |
148 | int bitBuffer; | |
149 | enum { | |
150 | DROP_NONE, | |
151 | DROP_FIRST_HALF, | |
152 | DROP_SECOND_HALF | |
153 | } drop; | |
154 | uint8_t *output; | |
155 | } Uart; | |
156 | ||
157 | static RAMFUNC int MillerDecoding(int bit) | |
158 | { | |
159 | int error = 0; | |
160 | int bitright; | |
161 | ||
162 | if(!Uart.bitBuffer) { | |
163 | Uart.bitBuffer = bit ^ 0xFF0; | |
164 | return FALSE; | |
165 | } | |
166 | else { | |
167 | Uart.bitBuffer <<= 4; | |
168 | Uart.bitBuffer ^= bit; | |
169 | } | |
170 | ||
171 | int EOC = FALSE; | |
172 | ||
173 | if(Uart.state != STATE_UNSYNCD) { | |
174 | Uart.posCnt++; | |
175 | ||
176 | if((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { | |
177 | bit = 0x00; | |
178 | } | |
179 | else { | |
180 | bit = 0x01; | |
181 | } | |
182 | if(((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { | |
183 | bitright = 0x00; | |
184 | } | |
185 | else { | |
186 | bitright = 0x01; | |
187 | } | |
188 | if(bit != bitright) { bit = bitright; } | |
189 | ||
190 | if(Uart.posCnt == 1) { | |
191 | // measurement first half bitperiod | |
192 | if(!bit) { | |
193 | Uart.drop = DROP_FIRST_HALF; | |
194 | } | |
195 | } | |
196 | else { | |
197 | // measurement second half bitperiod | |
198 | if(!bit & (Uart.drop == DROP_NONE)) { | |
199 | Uart.drop = DROP_SECOND_HALF; | |
200 | } | |
201 | else if(!bit) { | |
202 | // measured a drop in first and second half | |
203 | // which should not be possible | |
204 | Uart.state = STATE_ERROR_WAIT; | |
205 | error = 0x01; | |
206 | } | |
207 | ||
208 | Uart.posCnt = 0; | |
209 | ||
210 | switch(Uart.state) { | |
211 | case STATE_START_OF_COMMUNICATION: | |
212 | Uart.shiftReg = 0; | |
213 | if(Uart.drop == DROP_SECOND_HALF) { | |
214 | // error, should not happen in SOC | |
215 | Uart.state = STATE_ERROR_WAIT; | |
216 | error = 0x02; | |
217 | } | |
218 | else { | |
219 | // correct SOC | |
220 | Uart.state = STATE_MILLER_Z; | |
221 | } | |
222 | break; | |
223 | ||
224 | case STATE_MILLER_Z: | |
225 | Uart.bitCnt++; | |
226 | Uart.shiftReg >>= 1; | |
227 | if(Uart.drop == DROP_NONE) { | |
228 | // logic '0' followed by sequence Y | |
229 | // end of communication | |
230 | Uart.state = STATE_UNSYNCD; | |
231 | EOC = TRUE; | |
232 | } | |
233 | // if(Uart.drop == DROP_FIRST_HALF) { | |
234 | // Uart.state = STATE_MILLER_Z; stay the same | |
235 | // we see a logic '0' } | |
236 | if(Uart.drop == DROP_SECOND_HALF) { | |
237 | // we see a logic '1' | |
238 | Uart.shiftReg |= 0x100; | |
239 | Uart.state = STATE_MILLER_X; | |
240 | } | |
241 | break; | |
242 | ||
243 | case STATE_MILLER_X: | |
244 | Uart.shiftReg >>= 1; | |
245 | if(Uart.drop == DROP_NONE) { | |
246 | // sequence Y, we see a '0' | |
247 | Uart.state = STATE_MILLER_Y; | |
248 | Uart.bitCnt++; | |
249 | } | |
250 | if(Uart.drop == DROP_FIRST_HALF) { | |
251 | // Would be STATE_MILLER_Z | |
252 | // but Z does not follow X, so error | |
253 | Uart.state = STATE_ERROR_WAIT; | |
254 | error = 0x03; | |
255 | } | |
256 | if(Uart.drop == DROP_SECOND_HALF) { | |
257 | // We see a '1' and stay in state X | |
258 | Uart.shiftReg |= 0x100; | |
259 | Uart.bitCnt++; | |
260 | } | |
261 | break; | |
262 | ||
263 | case STATE_MILLER_Y: | |
264 | Uart.bitCnt++; | |
265 | Uart.shiftReg >>= 1; | |
266 | if(Uart.drop == DROP_NONE) { | |
267 | // logic '0' followed by sequence Y | |
268 | // end of communication | |
269 | Uart.state = STATE_UNSYNCD; | |
270 | EOC = TRUE; | |
271 | } | |
272 | if(Uart.drop == DROP_FIRST_HALF) { | |
273 | // we see a '0' | |
274 | Uart.state = STATE_MILLER_Z; | |
275 | } | |
276 | if(Uart.drop == DROP_SECOND_HALF) { | |
277 | // We see a '1' and go to state X | |
278 | Uart.shiftReg |= 0x100; | |
279 | Uart.state = STATE_MILLER_X; | |
280 | } | |
281 | break; | |
282 | ||
283 | case STATE_ERROR_WAIT: | |
284 | // That went wrong. Now wait for at least two bit periods | |
285 | // and try to sync again | |
286 | if(Uart.drop == DROP_NONE) { | |
287 | Uart.highCnt = 6; | |
288 | Uart.state = STATE_UNSYNCD; | |
289 | } | |
290 | break; | |
291 | ||
292 | default: | |
293 | Uart.state = STATE_UNSYNCD; | |
294 | Uart.highCnt = 0; | |
295 | break; | |
296 | } | |
297 | ||
298 | Uart.drop = DROP_NONE; | |
299 | ||
300 | // should have received at least one whole byte... | |
301 | if((Uart.bitCnt == 2) && EOC && (Uart.byteCnt > 0)) { | |
302 | return TRUE; | |
303 | } | |
304 | ||
305 | if(Uart.bitCnt == 9) { | |
306 | Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); | |
307 | Uart.byteCnt++; | |
308 | ||
309 | Uart.parityBits <<= 1; | |
310 | Uart.parityBits ^= ((Uart.shiftReg >> 8) & 0x01); | |
311 | ||
312 | if(EOC) { | |
313 | // when End of Communication received and | |
314 | // all data bits processed.. | |
315 | return TRUE; | |
316 | } | |
317 | Uart.bitCnt = 0; | |
318 | } | |
319 | ||
320 | /*if(error) { | |
321 | Uart.output[Uart.byteCnt] = 0xAA; | |
322 | Uart.byteCnt++; | |
323 | Uart.output[Uart.byteCnt] = error & 0xFF; | |
324 | Uart.byteCnt++; | |
325 | Uart.output[Uart.byteCnt] = 0xAA; | |
326 | Uart.byteCnt++; | |
327 | Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF; | |
328 | Uart.byteCnt++; | |
329 | Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; | |
330 | Uart.byteCnt++; | |
331 | Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF; | |
332 | Uart.byteCnt++; | |
333 | Uart.output[Uart.byteCnt] = 0xAA; | |
334 | Uart.byteCnt++; | |
335 | return TRUE; | |
336 | }*/ | |
337 | } | |
338 | ||
339 | } | |
340 | else { | |
341 | bit = Uart.bitBuffer & 0xf0; | |
342 | bit >>= 4; | |
343 | bit ^= 0x0F; | |
344 | if(bit) { | |
345 | // should have been high or at least (4 * 128) / fc | |
346 | // according to ISO this should be at least (9 * 128 + 20) / fc | |
347 | if(Uart.highCnt == 8) { | |
348 | // we went low, so this could be start of communication | |
349 | // it turns out to be safer to choose a less significant | |
350 | // syncbit... so we check whether the neighbour also represents the drop | |
351 | Uart.posCnt = 1; // apparently we are busy with our first half bit period | |
352 | Uart.syncBit = bit & 8; | |
353 | Uart.samples = 3; | |
354 | if(!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } | |
355 | else if(bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } | |
356 | if(!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } | |
357 | else if(bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } | |
358 | if(!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; | |
359 | if(Uart.syncBit && (Uart.bitBuffer & 8)) { | |
360 | Uart.syncBit = 8; | |
361 | ||
362 | // the first half bit period is expected in next sample | |
363 | Uart.posCnt = 0; | |
364 | Uart.samples = 3; | |
365 | } | |
366 | } | |
367 | else if(bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } | |
368 | ||
369 | Uart.syncBit <<= 4; | |
370 | Uart.state = STATE_START_OF_COMMUNICATION; | |
371 | Uart.drop = DROP_FIRST_HALF; | |
372 | Uart.bitCnt = 0; | |
373 | Uart.byteCnt = 0; | |
374 | Uart.parityBits = 0; | |
375 | error = 0; | |
376 | } | |
377 | else { | |
378 | Uart.highCnt = 0; | |
379 | } | |
380 | } | |
381 | else { | |
382 | if(Uart.highCnt < 8) { | |
383 | Uart.highCnt++; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | return FALSE; | |
389 | } | |
390 | ||
391 | //============================================================================= | |
392 | // ISO 14443 Type A - Manchester | |
393 | //============================================================================= | |
394 | ||
395 | static struct { | |
396 | enum { | |
397 | DEMOD_UNSYNCD, | |
398 | DEMOD_START_OF_COMMUNICATION, | |
399 | DEMOD_MANCHESTER_D, | |
400 | DEMOD_MANCHESTER_E, | |
401 | DEMOD_MANCHESTER_F, | |
402 | DEMOD_ERROR_WAIT | |
403 | } state; | |
404 | int bitCount; | |
405 | int posCount; | |
406 | int syncBit; | |
407 | int parityBits; | |
408 | uint16_t shiftReg; | |
409 | int buffer; | |
410 | int buff; | |
411 | int samples; | |
412 | int len; | |
413 | enum { | |
414 | SUB_NONE, | |
415 | SUB_FIRST_HALF, | |
416 | SUB_SECOND_HALF | |
417 | } sub; | |
418 | uint8_t *output; | |
419 | } Demod; | |
420 | ||
421 | static RAMFUNC int ManchesterDecoding(int v) | |
422 | { | |
423 | int bit; | |
424 | int modulation; | |
425 | int error = 0; | |
426 | ||
427 | if(!Demod.buff) { | |
428 | Demod.buff = 1; | |
429 | Demod.buffer = v; | |
430 | return FALSE; | |
431 | } | |
432 | else { | |
433 | bit = Demod.buffer; | |
434 | Demod.buffer = v; | |
435 | } | |
436 | ||
437 | if(Demod.state==DEMOD_UNSYNCD) { | |
438 | Demod.output[Demod.len] = 0xfa; | |
439 | Demod.syncBit = 0; | |
440 | //Demod.samples = 0; | |
441 | Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part | |
442 | ||
443 | if(bit & 0x08) { | |
444 | Demod.syncBit = 0x08; | |
445 | } | |
446 | ||
447 | if(bit & 0x04) { | |
448 | if(Demod.syncBit) { | |
449 | bit <<= 4; | |
450 | } | |
451 | Demod.syncBit = 0x04; | |
452 | } | |
453 | ||
454 | if(bit & 0x02) { | |
455 | if(Demod.syncBit) { | |
456 | bit <<= 2; | |
457 | } | |
458 | Demod.syncBit = 0x02; | |
459 | } | |
460 | ||
461 | if(bit & 0x01 && Demod.syncBit) { | |
462 | Demod.syncBit = 0x01; | |
463 | } | |
464 | ||
465 | if(Demod.syncBit) { | |
466 | Demod.len = 0; | |
467 | Demod.state = DEMOD_START_OF_COMMUNICATION; | |
468 | Demod.sub = SUB_FIRST_HALF; | |
469 | Demod.bitCount = 0; | |
470 | Demod.shiftReg = 0; | |
471 | Demod.parityBits = 0; | |
472 | Demod.samples = 0; | |
473 | if(Demod.posCount) { | |
474 | if(trigger) LED_A_OFF(); | |
475 | switch(Demod.syncBit) { | |
476 | case 0x08: Demod.samples = 3; break; | |
477 | case 0x04: Demod.samples = 2; break; | |
478 | case 0x02: Demod.samples = 1; break; | |
479 | case 0x01: Demod.samples = 0; break; | |
480 | } | |
481 | } | |
482 | error = 0; | |
483 | } | |
484 | } | |
485 | else { | |
486 | //modulation = bit & Demod.syncBit; | |
487 | modulation = ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; | |
488 | ||
489 | Demod.samples += 4; | |
490 | ||
491 | if(Demod.posCount==0) { | |
492 | Demod.posCount = 1; | |
493 | if(modulation) { | |
494 | Demod.sub = SUB_FIRST_HALF; | |
495 | } | |
496 | else { | |
497 | Demod.sub = SUB_NONE; | |
498 | } | |
499 | } | |
500 | else { | |
501 | Demod.posCount = 0; | |
502 | if(modulation && (Demod.sub == SUB_FIRST_HALF)) { | |
503 | if(Demod.state!=DEMOD_ERROR_WAIT) { | |
504 | Demod.state = DEMOD_ERROR_WAIT; | |
505 | Demod.output[Demod.len] = 0xaa; | |
506 | error = 0x01; | |
507 | } | |
508 | } | |
509 | else if(modulation) { | |
510 | Demod.sub = SUB_SECOND_HALF; | |
511 | } | |
512 | ||
513 | switch(Demod.state) { | |
514 | case DEMOD_START_OF_COMMUNICATION: | |
515 | if(Demod.sub == SUB_FIRST_HALF) { | |
516 | Demod.state = DEMOD_MANCHESTER_D; | |
517 | } | |
518 | else { | |
519 | Demod.output[Demod.len] = 0xab; | |
520 | Demod.state = DEMOD_ERROR_WAIT; | |
521 | error = 0x02; | |
522 | } | |
523 | break; | |
524 | ||
525 | case DEMOD_MANCHESTER_D: | |
526 | case DEMOD_MANCHESTER_E: | |
527 | if(Demod.sub == SUB_FIRST_HALF) { | |
528 | Demod.bitCount++; | |
529 | Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100; | |
530 | Demod.state = DEMOD_MANCHESTER_D; | |
531 | } | |
532 | else if(Demod.sub == SUB_SECOND_HALF) { | |
533 | Demod.bitCount++; | |
534 | Demod.shiftReg >>= 1; | |
535 | Demod.state = DEMOD_MANCHESTER_E; | |
536 | } | |
537 | else { | |
538 | Demod.state = DEMOD_MANCHESTER_F; | |
539 | } | |
540 | break; | |
541 | ||
542 | case DEMOD_MANCHESTER_F: | |
543 | // Tag response does not need to be a complete byte! | |
544 | if(Demod.len > 0 || Demod.bitCount > 0) { | |
545 | if(Demod.bitCount > 0) { | |
546 | Demod.shiftReg >>= (9 - Demod.bitCount); | |
547 | Demod.output[Demod.len] = Demod.shiftReg & 0xff; | |
548 | Demod.len++; | |
549 | // No parity bit, so just shift a 0 | |
550 | Demod.parityBits <<= 1; | |
551 | } | |
552 | ||
553 | Demod.state = DEMOD_UNSYNCD; | |
554 | return TRUE; | |
555 | } | |
556 | else { | |
557 | Demod.output[Demod.len] = 0xad; | |
558 | Demod.state = DEMOD_ERROR_WAIT; | |
559 | error = 0x03; | |
560 | } | |
561 | break; | |
562 | ||
563 | case DEMOD_ERROR_WAIT: | |
564 | Demod.state = DEMOD_UNSYNCD; | |
565 | break; | |
566 | ||
567 | default: | |
568 | Demod.output[Demod.len] = 0xdd; | |
569 | Demod.state = DEMOD_UNSYNCD; | |
570 | break; | |
571 | } | |
572 | ||
573 | if(Demod.bitCount>=9) { | |
574 | Demod.output[Demod.len] = Demod.shiftReg & 0xff; | |
575 | Demod.len++; | |
576 | ||
577 | Demod.parityBits <<= 1; | |
578 | Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01); | |
579 | ||
580 | Demod.bitCount = 0; | |
581 | Demod.shiftReg = 0; | |
582 | } | |
583 | ||
584 | /*if(error) { | |
585 | Demod.output[Demod.len] = 0xBB; | |
586 | Demod.len++; | |
587 | Demod.output[Demod.len] = error & 0xFF; | |
588 | Demod.len++; | |
589 | Demod.output[Demod.len] = 0xBB; | |
590 | Demod.len++; | |
591 | Demod.output[Demod.len] = bit & 0xFF; | |
592 | Demod.len++; | |
593 | Demod.output[Demod.len] = Demod.buffer & 0xFF; | |
594 | Demod.len++; | |
595 | Demod.output[Demod.len] = Demod.syncBit & 0xFF; | |
596 | Demod.len++; | |
597 | Demod.output[Demod.len] = 0xBB; | |
598 | Demod.len++; | |
599 | return TRUE; | |
600 | }*/ | |
601 | ||
602 | } | |
603 | ||
604 | } // end (state != UNSYNCED) | |
605 | ||
606 | return FALSE; | |
607 | } | |
608 | ||
609 | //============================================================================= | |
610 | // Finally, a `sniffer' for ISO 14443 Type A | |
611 | // Both sides of communication! | |
612 | //============================================================================= | |
613 | ||
614 | //----------------------------------------------------------------------------- | |
615 | // Record the sequence of commands sent by the reader to the tag, with | |
616 | // triggering so that we start recording at the point that the tag is moved | |
617 | // near the reader. | |
618 | //----------------------------------------------------------------------------- | |
619 | void RAMFUNC SnoopIso14443a(void) | |
620 | { | |
621 | // #define RECV_CMD_OFFSET 2032 // original (working as of 21/2/09) values | |
622 | // #define RECV_RES_OFFSET 2096 // original (working as of 21/2/09) values | |
623 | // #define DMA_BUFFER_OFFSET 2160 // original (working as of 21/2/09) values | |
624 | // #define DMA_BUFFER_SIZE 4096 // original (working as of 21/2/09) values | |
625 | // #define TRACE_LENGTH 2000 // original (working as of 21/2/09) values | |
626 | ||
627 | // We won't start recording the frames that we acquire until we trigger; | |
628 | // a good trigger condition to get started is probably when we see a | |
629 | // response from the tag. | |
630 | int triggered = FALSE; // FALSE to wait first for card | |
631 | ||
632 | // The command (reader -> tag) that we're receiving. | |
633 | // The length of a received command will in most cases be no more than 18 bytes. | |
634 | // So 32 should be enough! | |
635 | uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET); | |
636 | // The response (tag -> reader) that we're receiving. | |
637 | uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET); | |
638 | ||
639 | // As we receive stuff, we copy it from receivedCmd or receivedResponse | |
640 | // into trace, along with its length and other annotations. | |
641 | //uint8_t *trace = (uint8_t *)BigBuf; | |
642 | ||
643 | traceLen = 0; // uncommented to fix ISSUE 15 - gerhard - jan2011 | |
644 | ||
645 | // The DMA buffer, used to stream samples from the FPGA | |
646 | int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET; | |
647 | int lastRxCounter; | |
648 | int8_t *upTo; | |
649 | int smpl; | |
650 | int maxBehindBy = 0; | |
651 | ||
652 | // Count of samples received so far, so that we can include timing | |
653 | // information in the trace buffer. | |
654 | int samples = 0; | |
655 | int rsamples = 0; | |
656 | ||
657 | memset(trace, 0x44, RECV_CMD_OFFSET); | |
658 | ||
659 | // Set up the demodulator for tag -> reader responses. | |
660 | Demod.output = receivedResponse; | |
661 | Demod.len = 0; | |
662 | Demod.state = DEMOD_UNSYNCD; | |
663 | ||
664 | // Setup for the DMA. | |
665 | FpgaSetupSsc(); | |
666 | upTo = dmaBuf; | |
667 | lastRxCounter = DMA_BUFFER_SIZE; | |
668 | FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); | |
669 | ||
670 | // And the reader -> tag commands | |
671 | memset(&Uart, 0, sizeof(Uart)); | |
672 | Uart.output = receivedCmd; | |
673 | Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// | |
674 | Uart.state = STATE_UNSYNCD; | |
675 | ||
676 | // And put the FPGA in the appropriate mode | |
677 | // Signal field is off with the appropriate LED | |
678 | LED_D_OFF(); | |
679 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); | |
680 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
681 | ||
682 | ||
683 | // And now we loop, receiving samples. | |
684 | for(;;) { | |
685 | LED_A_ON(); | |
686 | WDT_HIT(); | |
687 | int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & | |
688 | (DMA_BUFFER_SIZE-1); | |
689 | if(behindBy > maxBehindBy) { | |
690 | maxBehindBy = behindBy; | |
691 | if(behindBy > 400) { | |
692 | Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); | |
693 | goto done; | |
694 | } | |
695 | } | |
696 | if(behindBy < 1) continue; | |
697 | ||
698 | LED_A_OFF(); | |
699 | smpl = upTo[0]; | |
700 | upTo++; | |
701 | lastRxCounter -= 1; | |
702 | if(upTo - dmaBuf > DMA_BUFFER_SIZE) { | |
703 | upTo -= DMA_BUFFER_SIZE; | |
704 | lastRxCounter += DMA_BUFFER_SIZE; | |
705 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; | |
706 | AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; | |
707 | } | |
708 | ||
709 | samples += 4; | |
710 | if(MillerDecoding((smpl & 0xF0) >> 4)) { | |
711 | rsamples = samples - Uart.samples; | |
712 | LED_C_ON(); | |
713 | if(triggered) { | |
714 | trace[traceLen++] = ((rsamples >> 0) & 0xff); | |
715 | trace[traceLen++] = ((rsamples >> 8) & 0xff); | |
716 | trace[traceLen++] = ((rsamples >> 16) & 0xff); | |
717 | trace[traceLen++] = ((rsamples >> 24) & 0xff); | |
718 | trace[traceLen++] = ((Uart.parityBits >> 0) & 0xff); | |
719 | trace[traceLen++] = ((Uart.parityBits >> 8) & 0xff); | |
720 | trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff); | |
721 | trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff); | |
722 | trace[traceLen++] = Uart.byteCnt; | |
723 | memcpy(trace+traceLen, receivedCmd, Uart.byteCnt); | |
724 | traceLen += Uart.byteCnt; | |
725 | if(traceLen > TRACE_LENGTH) break; | |
726 | } | |
727 | /* And ready to receive another command. */ | |
728 | Uart.state = STATE_UNSYNCD; | |
729 | /* And also reset the demod code, which might have been */ | |
730 | /* false-triggered by the commands from the reader. */ | |
731 | Demod.state = DEMOD_UNSYNCD; | |
732 | LED_B_OFF(); | |
733 | } | |
734 | ||
735 | if(ManchesterDecoding(smpl & 0x0F)) { | |
736 | rsamples = samples - Demod.samples; | |
737 | LED_B_ON(); | |
738 | ||
739 | // timestamp, as a count of samples | |
740 | trace[traceLen++] = ((rsamples >> 0) & 0xff); | |
741 | trace[traceLen++] = ((rsamples >> 8) & 0xff); | |
742 | trace[traceLen++] = ((rsamples >> 16) & 0xff); | |
743 | trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff); | |
744 | trace[traceLen++] = ((Demod.parityBits >> 0) & 0xff); | |
745 | trace[traceLen++] = ((Demod.parityBits >> 8) & 0xff); | |
746 | trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff); | |
747 | trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff); | |
748 | // length | |
749 | trace[traceLen++] = Demod.len; | |
750 | memcpy(trace+traceLen, receivedResponse, Demod.len); | |
751 | traceLen += Demod.len; | |
752 | if(traceLen > TRACE_LENGTH) break; | |
753 | ||
754 | triggered = TRUE; | |
755 | ||
756 | // And ready to receive another response. | |
757 | memset(&Demod, 0, sizeof(Demod)); | |
758 | Demod.output = receivedResponse; | |
759 | Demod.state = DEMOD_UNSYNCD; | |
760 | LED_C_OFF(); | |
761 | } | |
762 | ||
763 | if(BUTTON_PRESS()) { | |
764 | DbpString("cancelled_a"); | |
765 | goto done; | |
766 | } | |
767 | } | |
768 | ||
769 | DbpString("COMMAND FINISHED"); | |
770 | ||
771 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); | |
772 | Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]); | |
773 | ||
774 | done: | |
775 | AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; | |
776 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); | |
777 | Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]); | |
778 | LED_A_OFF(); | |
779 | LED_B_OFF(); | |
780 | LED_C_OFF(); | |
781 | LED_D_OFF(); | |
782 | } | |
783 | ||
784 | //----------------------------------------------------------------------------- | |
785 | // Prepare tag messages | |
786 | //----------------------------------------------------------------------------- | |
787 | static void CodeIso14443aAsTag(const uint8_t *cmd, int len) | |
788 | { | |
789 | int i; | |
790 | int oddparity; | |
791 | ||
792 | ToSendReset(); | |
793 | ||
794 | // Correction bit, might be removed when not needed | |
795 | ToSendStuffBit(0); | |
796 | ToSendStuffBit(0); | |
797 | ToSendStuffBit(0); | |
798 | ToSendStuffBit(0); | |
799 | ToSendStuffBit(1); // 1 | |
800 | ToSendStuffBit(0); | |
801 | ToSendStuffBit(0); | |
802 | ToSendStuffBit(0); | |
803 | ||
804 | // Send startbit | |
805 | ToSend[++ToSendMax] = SEC_D; | |
806 | ||
807 | for(i = 0; i < len; i++) { | |
808 | int j; | |
809 | uint8_t b = cmd[i]; | |
810 | ||
811 | // Data bits | |
812 | oddparity = 0x01; | |
813 | for(j = 0; j < 8; j++) { | |
814 | oddparity ^= (b & 1); | |
815 | if(b & 1) { | |
816 | ToSend[++ToSendMax] = SEC_D; | |
817 | } else { | |
818 | ToSend[++ToSendMax] = SEC_E; | |
819 | } | |
820 | b >>= 1; | |
821 | } | |
822 | ||
823 | // Parity bit | |
824 | if(oddparity) { | |
825 | ToSend[++ToSendMax] = SEC_D; | |
826 | } else { | |
827 | ToSend[++ToSendMax] = SEC_E; | |
828 | } | |
829 | } | |
830 | ||
831 | // Send stopbit | |
832 | ToSend[++ToSendMax] = SEC_F; | |
833 | ||
834 | // Flush the buffer in FPGA!! | |
835 | for(i = 0; i < 5; i++) { | |
836 | ToSend[++ToSendMax] = SEC_F; | |
837 | } | |
838 | ||
839 | // Convert from last byte pos to length | |
840 | ToSendMax++; | |
841 | ||
842 | // Add a few more for slop | |
843 | ToSend[ToSendMax++] = 0x00; | |
844 | ToSend[ToSendMax++] = 0x00; | |
845 | //ToSendMax += 2; | |
846 | } | |
847 | ||
848 | //----------------------------------------------------------------------------- | |
849 | // This is to send a NACK kind of answer, its only 3 bits, I know it should be 4 | |
850 | //----------------------------------------------------------------------------- | |
851 | static void CodeStrangeAnswer() | |
852 | { | |
853 | int i; | |
854 | ||
855 | ToSendReset(); | |
856 | ||
857 | // Correction bit, might be removed when not needed | |
858 | ToSendStuffBit(0); | |
859 | ToSendStuffBit(0); | |
860 | ToSendStuffBit(0); | |
861 | ToSendStuffBit(0); | |
862 | ToSendStuffBit(1); // 1 | |
863 | ToSendStuffBit(0); | |
864 | ToSendStuffBit(0); | |
865 | ToSendStuffBit(0); | |
866 | ||
867 | // Send startbit | |
868 | ToSend[++ToSendMax] = SEC_D; | |
869 | ||
870 | // 0 | |
871 | ToSend[++ToSendMax] = SEC_E; | |
872 | ||
873 | // 0 | |
874 | ToSend[++ToSendMax] = SEC_E; | |
875 | ||
876 | // 1 | |
877 | ToSend[++ToSendMax] = SEC_D; | |
878 | ||
879 | // Send stopbit | |
880 | ToSend[++ToSendMax] = SEC_F; | |
881 | ||
882 | // Flush the buffer in FPGA!! | |
883 | for(i = 0; i < 5; i++) { | |
884 | ToSend[++ToSendMax] = SEC_F; | |
885 | } | |
886 | ||
887 | // Convert from last byte pos to length | |
888 | ToSendMax++; | |
889 | ||
890 | // Add a few more for slop | |
891 | ToSend[ToSendMax++] = 0x00; | |
892 | ToSend[ToSendMax++] = 0x00; | |
893 | //ToSendMax += 2; | |
894 | } | |
895 | ||
896 | //----------------------------------------------------------------------------- | |
897 | // Wait for commands from reader | |
898 | // Stop when button is pressed | |
899 | // Or return TRUE when command is captured | |
900 | //----------------------------------------------------------------------------- | |
901 | static int GetIso14443aCommandFromReader(uint8_t *received, int *len, int maxLen) | |
902 | { | |
903 | // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen | |
904 | // only, since we are receiving, not transmitting). | |
905 | // Signal field is off with the appropriate LED | |
906 | LED_D_OFF(); | |
907 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN); | |
908 | ||
909 | // Now run a `software UART' on the stream of incoming samples. | |
910 | Uart.output = received; | |
911 | Uart.byteCntMax = maxLen; | |
912 | Uart.state = STATE_UNSYNCD; | |
913 | ||
914 | for(;;) { | |
915 | WDT_HIT(); | |
916 | ||
917 | if(BUTTON_PRESS()) return FALSE; | |
918 | ||
919 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
920 | AT91C_BASE_SSC->SSC_THR = 0x00; | |
921 | } | |
922 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
923 | uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; | |
924 | if(MillerDecoding((b & 0xf0) >> 4)) { | |
925 | *len = Uart.byteCnt; | |
926 | return TRUE; | |
927 | } | |
928 | if(MillerDecoding(b & 0x0f)) { | |
929 | *len = Uart.byteCnt; | |
930 | return TRUE; | |
931 | } | |
932 | } | |
933 | } | |
934 | } | |
935 | ||
936 | //----------------------------------------------------------------------------- | |
937 | // Main loop of simulated tag: receive commands from reader, decide what | |
938 | // response to send, and send it. | |
939 | //----------------------------------------------------------------------------- | |
940 | void SimulateIso14443aTag(int tagType, int TagUid) | |
941 | { | |
942 | // This function contains the tag emulation | |
943 | ||
944 | // Prepare protocol messages | |
945 | // static const uint8_t cmd1[] = { 0x26 }; | |
946 | // static const uint8_t response1[] = { 0x02, 0x00 }; // Says: I am Mifare 4k - original line - greg | |
947 | // | |
948 | static const uint8_t response1[] = { 0x44, 0x03 }; // Says: I am a DESFire Tag, ph33r me | |
949 | // static const uint8_t response1[] = { 0x44, 0x00 }; // Says: I am a ULTRALITE Tag, 0wn me | |
950 | ||
951 | // UID response | |
952 | // static const uint8_t cmd2[] = { 0x93, 0x20 }; | |
953 | //static const uint8_t response2[] = { 0x9a, 0xe5, 0xe4, 0x43, 0xd8 }; // original value - greg | |
954 | ||
955 | // my desfire | |
956 | static const uint8_t response2[] = { 0x88, 0x04, 0x21, 0x3f, 0x4d }; // known uid - note cascade (0x88), 2nd byte (0x04) = NXP/Phillips | |
957 | ||
958 | ||
959 | // When reader selects us during cascade1 it will send cmd3 | |
960 | //uint8_t response3[] = { 0x04, 0x00, 0x00 }; // SAK Select (cascade1) successful response (ULTRALITE) | |
961 | uint8_t response3[] = { 0x24, 0x00, 0x00 }; // SAK Select (cascade1) successful response (DESFire) | |
962 | ComputeCrc14443(CRC_14443_A, response3, 1, &response3[1], &response3[2]); | |
963 | ||
964 | // send cascade2 2nd half of UID | |
965 | static const uint8_t response2a[] = { 0x51, 0x48, 0x1d, 0x80, 0x84 }; // uid - cascade2 - 2nd half (4 bytes) of UID+ BCCheck | |
966 | // NOTE : THE CRC on the above may be wrong as I have obfuscated the actual UID | |
967 | ||
968 | // When reader selects us during cascade2 it will send cmd3a | |
969 | //uint8_t response3a[] = { 0x00, 0x00, 0x00 }; // SAK Select (cascade2) successful response (ULTRALITE) | |
970 | uint8_t response3a[] = { 0x20, 0x00, 0x00 }; // SAK Select (cascade2) successful response (DESFire) | |
971 | ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]); | |
972 | ||
973 | static const uint8_t response5[] = { 0x00, 0x00, 0x00, 0x00 }; // Very random tag nonce | |
974 | ||
975 | uint8_t *resp; | |
976 | int respLen; | |
977 | ||
978 | // Longest possible response will be 16 bytes + 2 CRC = 18 bytes | |
979 | // This will need | |
980 | // 144 data bits (18 * 8) | |
981 | // 18 parity bits | |
982 | // 2 Start and stop | |
983 | // 1 Correction bit (Answer in 1172 or 1236 periods, see FPGA) | |
984 | // 1 just for the case | |
985 | // ----------- + | |
986 | // 166 | |
987 | // | |
988 | // 166 bytes, since every bit that needs to be send costs us a byte | |
989 | // | |
990 | ||
991 | // Respond with card type | |
992 | uint8_t *resp1 = (((uint8_t *)BigBuf) + 800); | |
993 | int resp1Len; | |
994 | ||
995 | // Anticollision cascade1 - respond with uid | |
996 | uint8_t *resp2 = (((uint8_t *)BigBuf) + 970); | |
997 | int resp2Len; | |
998 | ||
999 | // Anticollision cascade2 - respond with 2nd half of uid if asked | |
1000 | // we're only going to be asked if we set the 1st byte of the UID (during cascade1) to 0x88 | |
1001 | uint8_t *resp2a = (((uint8_t *)BigBuf) + 1140); | |
1002 | int resp2aLen; | |
1003 | ||
1004 | // Acknowledge select - cascade 1 | |
1005 | uint8_t *resp3 = (((uint8_t *)BigBuf) + 1310); | |
1006 | int resp3Len; | |
1007 | ||
1008 | // Acknowledge select - cascade 2 | |
1009 | uint8_t *resp3a = (((uint8_t *)BigBuf) + 1480); | |
1010 | int resp3aLen; | |
1011 | ||
1012 | // Response to a read request - not implemented atm | |
1013 | uint8_t *resp4 = (((uint8_t *)BigBuf) + 1550); | |
1014 | int resp4Len; | |
1015 | ||
1016 | // Authenticate response - nonce | |
1017 | uint8_t *resp5 = (((uint8_t *)BigBuf) + 1720); | |
1018 | int resp5Len; | |
1019 | ||
1020 | uint8_t *receivedCmd = (uint8_t *)BigBuf; | |
1021 | int len; | |
1022 | ||
1023 | int i; | |
1024 | int u; | |
1025 | uint8_t b; | |
1026 | ||
1027 | // To control where we are in the protocol | |
1028 | int order = 0; | |
1029 | int lastorder; | |
1030 | ||
1031 | // Just to allow some checks | |
1032 | int happened = 0; | |
1033 | int happened2 = 0; | |
1034 | ||
1035 | int cmdsRecvd = 0; | |
1036 | ||
1037 | int fdt_indicator; | |
1038 | ||
1039 | memset(receivedCmd, 0x44, 400); | |
1040 | ||
1041 | // Prepare the responses of the anticollision phase | |
1042 | // there will be not enough time to do this at the moment the reader sends it REQA | |
1043 | ||
1044 | // Answer to request | |
1045 | CodeIso14443aAsTag(response1, sizeof(response1)); | |
1046 | memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax; | |
1047 | ||
1048 | // Send our UID (cascade 1) | |
1049 | CodeIso14443aAsTag(response2, sizeof(response2)); | |
1050 | memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax; | |
1051 | ||
1052 | // Answer to select (cascade1) | |
1053 | CodeIso14443aAsTag(response3, sizeof(response3)); | |
1054 | memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax; | |
1055 | ||
1056 | // Send the cascade 2 2nd part of the uid | |
1057 | CodeIso14443aAsTag(response2a, sizeof(response2a)); | |
1058 | memcpy(resp2a, ToSend, ToSendMax); resp2aLen = ToSendMax; | |
1059 | ||
1060 | // Answer to select (cascade 2) | |
1061 | CodeIso14443aAsTag(response3a, sizeof(response3a)); | |
1062 | memcpy(resp3a, ToSend, ToSendMax); resp3aLen = ToSendMax; | |
1063 | ||
1064 | // Strange answer is an example of rare message size (3 bits) | |
1065 | CodeStrangeAnswer(); | |
1066 | memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax; | |
1067 | ||
1068 | // Authentication answer (random nonce) | |
1069 | CodeIso14443aAsTag(response5, sizeof(response5)); | |
1070 | memcpy(resp5, ToSend, ToSendMax); resp5Len = ToSendMax; | |
1071 | ||
1072 | // We need to listen to the high-frequency, peak-detected path. | |
1073 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1074 | FpgaSetupSsc(); | |
1075 | ||
1076 | cmdsRecvd = 0; | |
1077 | ||
1078 | LED_A_ON(); | |
1079 | for(;;) { | |
1080 | ||
1081 | if(!GetIso14443aCommandFromReader(receivedCmd, &len, 100)) { | |
1082 | DbpString("button press"); | |
1083 | break; | |
1084 | } | |
1085 | // doob - added loads of debug strings so we can see what the reader is saying to us during the sim as hi14alist is not populated | |
1086 | // Okay, look at the command now. | |
1087 | lastorder = order; | |
1088 | i = 1; // first byte transmitted | |
1089 | if(receivedCmd[0] == 0x26) { | |
1090 | // Received a REQUEST | |
1091 | resp = resp1; respLen = resp1Len; order = 1; | |
1092 | //DbpString("Hello request from reader:"); | |
1093 | } else if(receivedCmd[0] == 0x52) { | |
1094 | // Received a WAKEUP | |
1095 | resp = resp1; respLen = resp1Len; order = 6; | |
1096 | // //DbpString("Wakeup request from reader:"); | |
1097 | ||
1098 | } else if(receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // greg - cascade 1 anti-collision | |
1099 | // Received request for UID (cascade 1) | |
1100 | resp = resp2; respLen = resp2Len; order = 2; | |
1101 | // DbpString("UID (cascade 1) request from reader:"); | |
1102 | // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1103 | ||
1104 | ||
1105 | } else if(receivedCmd[1] == 0x20 && receivedCmd[0] ==0x95) { // greg - cascade 2 anti-collision | |
1106 | // Received request for UID (cascade 2) | |
1107 | resp = resp2a; respLen = resp2aLen; order = 20; | |
1108 | // DbpString("UID (cascade 2) request from reader:"); | |
1109 | // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1110 | ||
1111 | ||
1112 | } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x93) { // greg - cascade 1 select | |
1113 | // Received a SELECT | |
1114 | resp = resp3; respLen = resp3Len; order = 3; | |
1115 | // DbpString("Select (cascade 1) request from reader:"); | |
1116 | // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1117 | ||
1118 | ||
1119 | } else if(receivedCmd[1] == 0x70 && receivedCmd[0] ==0x95) { // greg - cascade 2 select | |
1120 | // Received a SELECT | |
1121 | resp = resp3a; respLen = resp3aLen; order = 30; | |
1122 | // DbpString("Select (cascade 2) request from reader:"); | |
1123 | // DbpIntegers(receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1124 | ||
1125 | ||
1126 | } else if(receivedCmd[0] == 0x30) { | |
1127 | // Received a READ | |
1128 | resp = resp4; respLen = resp4Len; order = 4; // Do nothing | |
1129 | Dbprintf("Read request from reader: %x %x %x", | |
1130 | receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1131 | ||
1132 | ||
1133 | } else if(receivedCmd[0] == 0x50) { | |
1134 | // Received a HALT | |
1135 | resp = resp1; respLen = 0; order = 5; // Do nothing | |
1136 | DbpString("Reader requested we HALT!:"); | |
1137 | ||
1138 | } else if(receivedCmd[0] == 0x60) { | |
1139 | // Received an authentication request | |
1140 | resp = resp5; respLen = resp5Len; order = 7; | |
1141 | Dbprintf("Authenticate request from reader: %x %x %x", | |
1142 | receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1143 | ||
1144 | } else if(receivedCmd[0] == 0xE0) { | |
1145 | // Received a RATS request | |
1146 | resp = resp1; respLen = 0;order = 70; | |
1147 | Dbprintf("RATS request from reader: %x %x %x", | |
1148 | receivedCmd[0], receivedCmd[1], receivedCmd[2]); | |
1149 | } else { | |
1150 | // Never seen this command before | |
1151 | Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x", | |
1152 | len, | |
1153 | receivedCmd[0], receivedCmd[1], receivedCmd[2], | |
1154 | receivedCmd[3], receivedCmd[4], receivedCmd[5], | |
1155 | receivedCmd[6], receivedCmd[7], receivedCmd[8]); | |
1156 | // Do not respond | |
1157 | resp = resp1; respLen = 0; order = 0; | |
1158 | } | |
1159 | ||
1160 | // Count number of wakeups received after a halt | |
1161 | if(order == 6 && lastorder == 5) { happened++; } | |
1162 | ||
1163 | // Count number of other messages after a halt | |
1164 | if(order != 6 && lastorder == 5) { happened2++; } | |
1165 | ||
1166 | // Look at last parity bit to determine timing of answer | |
1167 | if((Uart.parityBits & 0x01) || receivedCmd[0] == 0x52) { | |
1168 | // 1236, so correction bit needed | |
1169 | i = 0; | |
1170 | } | |
1171 | ||
1172 | memset(receivedCmd, 0x44, 32); | |
1173 | ||
1174 | if(cmdsRecvd > 999) { | |
1175 | DbpString("1000 commands later..."); | |
1176 | break; | |
1177 | } | |
1178 | else { | |
1179 | cmdsRecvd++; | |
1180 | } | |
1181 | ||
1182 | if(respLen <= 0) continue; | |
1183 | ||
1184 | // Modulate Manchester | |
1185 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD); | |
1186 | AT91C_BASE_SSC->SSC_THR = 0x00; | |
1187 | FpgaSetupSsc(); | |
1188 | ||
1189 | // ### Transmit the response ### | |
1190 | u = 0; | |
1191 | b = 0x00; | |
1192 | fdt_indicator = FALSE; | |
1193 | for(;;) { | |
1194 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1195 | volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; | |
1196 | (void)b; | |
1197 | } | |
1198 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1199 | if(i > respLen) { | |
1200 | b = 0x00; | |
1201 | u++; | |
1202 | } else { | |
1203 | b = resp[i]; | |
1204 | i++; | |
1205 | } | |
1206 | AT91C_BASE_SSC->SSC_THR = b; | |
1207 | ||
1208 | if(u > 4) { | |
1209 | break; | |
1210 | } | |
1211 | } | |
1212 | if(BUTTON_PRESS()) { | |
1213 | break; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | } | |
1218 | ||
1219 | Dbprintf("%x %x %x", happened, happened2, cmdsRecvd); | |
1220 | LED_A_OFF(); | |
1221 | } | |
1222 | ||
1223 | //----------------------------------------------------------------------------- | |
1224 | // Transmit the command (to the tag) that was placed in ToSend[]. | |
1225 | //----------------------------------------------------------------------------- | |
1226 | static void TransmitFor14443a(const uint8_t *cmd, int len, int *samples, int *wait) | |
1227 | { | |
1228 | int c; | |
1229 | ||
1230 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1231 | ||
1232 | if (wait) | |
1233 | if(*wait < 10) | |
1234 | *wait = 10; | |
1235 | ||
1236 | for(c = 0; c < *wait;) { | |
1237 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1238 | AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! | |
1239 | c++; | |
1240 | } | |
1241 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1242 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1243 | (void)r; | |
1244 | } | |
1245 | WDT_HIT(); | |
1246 | } | |
1247 | ||
1248 | c = 0; | |
1249 | for(;;) { | |
1250 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1251 | AT91C_BASE_SSC->SSC_THR = cmd[c]; | |
1252 | c++; | |
1253 | if(c >= len) { | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1258 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1259 | (void)r; | |
1260 | } | |
1261 | WDT_HIT(); | |
1262 | } | |
1263 | if (samples) *samples = (c + *wait) << 3; | |
1264 | } | |
1265 | ||
1266 | //----------------------------------------------------------------------------- | |
1267 | // Code a 7-bit command without parity bit | |
1268 | // This is especially for 0x26 and 0x52 (REQA and WUPA) | |
1269 | //----------------------------------------------------------------------------- | |
1270 | void ShortFrameFromReader(const uint8_t bt) | |
1271 | { | |
1272 | int j; | |
1273 | int last; | |
1274 | uint8_t b; | |
1275 | ||
1276 | ToSendReset(); | |
1277 | ||
1278 | // Start of Communication (Seq. Z) | |
1279 | ToSend[++ToSendMax] = SEC_Z; | |
1280 | last = 0; | |
1281 | ||
1282 | b = bt; | |
1283 | for(j = 0; j < 7; j++) { | |
1284 | if(b & 1) { | |
1285 | // Sequence X | |
1286 | ToSend[++ToSendMax] = SEC_X; | |
1287 | last = 1; | |
1288 | } else { | |
1289 | if(last == 0) { | |
1290 | // Sequence Z | |
1291 | ToSend[++ToSendMax] = SEC_Z; | |
1292 | } | |
1293 | else { | |
1294 | // Sequence Y | |
1295 | ToSend[++ToSendMax] = SEC_Y; | |
1296 | last = 0; | |
1297 | } | |
1298 | } | |
1299 | b >>= 1; | |
1300 | } | |
1301 | ||
1302 | // End of Communication | |
1303 | if(last == 0) { | |
1304 | // Sequence Z | |
1305 | ToSend[++ToSendMax] = SEC_Z; | |
1306 | } | |
1307 | else { | |
1308 | // Sequence Y | |
1309 | ToSend[++ToSendMax] = SEC_Y; | |
1310 | last = 0; | |
1311 | } | |
1312 | // Sequence Y | |
1313 | ToSend[++ToSendMax] = SEC_Y; | |
1314 | ||
1315 | // Just to be sure! | |
1316 | ToSend[++ToSendMax] = SEC_Y; | |
1317 | ToSend[++ToSendMax] = SEC_Y; | |
1318 | ToSend[++ToSendMax] = SEC_Y; | |
1319 | ||
1320 | // Convert from last character reference to length | |
1321 | ToSendMax++; | |
1322 | } | |
1323 | ||
1324 | //----------------------------------------------------------------------------- | |
1325 | // Prepare reader command to send to FPGA | |
1326 | // | |
1327 | //----------------------------------------------------------------------------- | |
1328 | void CodeIso14443aAsReaderPar(const uint8_t * cmd, int len, uint32_t dwParity) | |
1329 | { | |
1330 | int i, j; | |
1331 | int last; | |
1332 | uint8_t b; | |
1333 | ||
1334 | ToSendReset(); | |
1335 | ||
1336 | // Start of Communication (Seq. Z) | |
1337 | ToSend[++ToSendMax] = SEC_Z; | |
1338 | last = 0; | |
1339 | ||
1340 | // Generate send structure for the data bits | |
1341 | for (i = 0; i < len; i++) { | |
1342 | // Get the current byte to send | |
1343 | b = cmd[i]; | |
1344 | ||
1345 | for (j = 0; j < 8; j++) { | |
1346 | if (b & 1) { | |
1347 | // Sequence X | |
1348 | ToSend[++ToSendMax] = SEC_X; | |
1349 | last = 1; | |
1350 | } else { | |
1351 | if (last == 0) { | |
1352 | // Sequence Z | |
1353 | ToSend[++ToSendMax] = SEC_Z; | |
1354 | } else { | |
1355 | // Sequence Y | |
1356 | ToSend[++ToSendMax] = SEC_Y; | |
1357 | last = 0; | |
1358 | } | |
1359 | } | |
1360 | b >>= 1; | |
1361 | } | |
1362 | ||
1363 | // Get the parity bit | |
1364 | if ((dwParity >> i) & 0x01) { | |
1365 | // Sequence X | |
1366 | ToSend[++ToSendMax] = SEC_X; | |
1367 | last = 1; | |
1368 | } else { | |
1369 | if (last == 0) { | |
1370 | // Sequence Z | |
1371 | ToSend[++ToSendMax] = SEC_Z; | |
1372 | } else { | |
1373 | // Sequence Y | |
1374 | ToSend[++ToSendMax] = SEC_Y; | |
1375 | last = 0; | |
1376 | } | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | // End of Communication | |
1381 | if (last == 0) { | |
1382 | // Sequence Z | |
1383 | ToSend[++ToSendMax] = SEC_Z; | |
1384 | } else { | |
1385 | // Sequence Y | |
1386 | ToSend[++ToSendMax] = SEC_Y; | |
1387 | last = 0; | |
1388 | } | |
1389 | // Sequence Y | |
1390 | ToSend[++ToSendMax] = SEC_Y; | |
1391 | ||
1392 | // Just to be sure! | |
1393 | ToSend[++ToSendMax] = SEC_Y; | |
1394 | ToSend[++ToSendMax] = SEC_Y; | |
1395 | ToSend[++ToSendMax] = SEC_Y; | |
1396 | ||
1397 | // Convert from last character reference to length | |
1398 | ToSendMax++; | |
1399 | } | |
1400 | ||
1401 | //----------------------------------------------------------------------------- | |
1402 | // Wait a certain time for tag response | |
1403 | // If a response is captured return TRUE | |
1404 | // If it takes to long return FALSE | |
1405 | //----------------------------------------------------------------------------- | |
1406 | static int GetIso14443aAnswerFromTag(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer | |
1407 | { | |
1408 | // buffer needs to be 512 bytes | |
1409 | int c; | |
1410 | ||
1411 | // Set FPGA mode to "reader listen mode", no modulation (listen | |
1412 | // only, since we are receiving, not transmitting). | |
1413 | // Signal field is on with the appropriate LED | |
1414 | LED_D_ON(); | |
1415 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); | |
1416 | ||
1417 | // Now get the answer from the card | |
1418 | Demod.output = receivedResponse; | |
1419 | Demod.len = 0; | |
1420 | Demod.state = DEMOD_UNSYNCD; | |
1421 | ||
1422 | uint8_t b; | |
1423 | if (elapsed) *elapsed = 0; | |
1424 | ||
1425 | c = 0; | |
1426 | for(;;) { | |
1427 | WDT_HIT(); | |
1428 | ||
1429 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1430 | AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! | |
1431 | if (elapsed) (*elapsed)++; | |
1432 | } | |
1433 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1434 | if(c < iso14a_timeout) { c++; } else { return FALSE; } | |
1435 | b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; | |
1436 | if(ManchesterDecoding((b>>4) & 0xf)) { | |
1437 | *samples = ((c - 1) << 3) + 4; | |
1438 | return TRUE; | |
1439 | } | |
1440 | if(ManchesterDecoding(b & 0x0f)) { | |
1441 | *samples = c << 3; | |
1442 | return TRUE; | |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | void ReaderTransmitShort(const uint8_t* bt) | |
1449 | { | |
1450 | int wait = 0; | |
1451 | int samples = 0; | |
1452 | ||
1453 | ShortFrameFromReader(*bt); | |
1454 | ||
1455 | // Select the card | |
1456 | TransmitFor14443a(ToSend, ToSendMax, &samples, &wait); | |
1457 | ||
1458 | // Store reader command in buffer | |
1459 | if (tracing) LogTrace(bt,1,0,GetParity(bt,1),TRUE); | |
1460 | } | |
1461 | ||
1462 | void ReaderTransmitPar(uint8_t* frame, int len, uint32_t par) | |
1463 | { | |
1464 | int wait = 0; | |
1465 | int samples = 0; | |
1466 | ||
1467 | // This is tied to other size changes | |
1468 | // uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024; | |
1469 | CodeIso14443aAsReaderPar(frame,len,par); | |
1470 | ||
1471 | // Select the card | |
1472 | TransmitFor14443a(ToSend, ToSendMax, &samples, &wait); | |
1473 | if(trigger) | |
1474 | LED_A_ON(); | |
1475 | ||
1476 | // Store reader command in buffer | |
1477 | if (tracing) LogTrace(frame,len,0,par,TRUE); | |
1478 | } | |
1479 | ||
1480 | ||
1481 | void ReaderTransmit(uint8_t* frame, int len) | |
1482 | { | |
1483 | // Generate parity and redirect | |
1484 | ReaderTransmitPar(frame,len,GetParity(frame,len)); | |
1485 | } | |
1486 | ||
1487 | int ReaderReceive(uint8_t* receivedAnswer) | |
1488 | { | |
1489 | int samples = 0; | |
1490 | if (!GetIso14443aAnswerFromTag(receivedAnswer,160,&samples,0)) return FALSE; | |
1491 | if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); | |
1492 | if(samples == 0) return FALSE; | |
1493 | return Demod.len; | |
1494 | } | |
1495 | ||
1496 | int ReaderReceivePar(uint8_t* receivedAnswer, uint32_t * parptr) | |
1497 | { | |
1498 | int samples = 0; | |
1499 | if (!GetIso14443aAnswerFromTag(receivedAnswer,160,&samples,0)) return FALSE; | |
1500 | if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE); | |
1501 | *parptr = Demod.parityBits; | |
1502 | if(samples == 0) return FALSE; | |
1503 | return Demod.len; | |
1504 | } | |
1505 | ||
1506 | /* performs iso14443a anticolision procedure | |
1507 | * fills the uid pointer unless NULL | |
1508 | * fills resp_data unless NULL */ | |
1509 | int iso14443a_select_card(uint8_t * uid_ptr, iso14a_card_select_t * resp_data, uint32_t * cuid_ptr) { | |
1510 | uint8_t wupa[] = { 0x52 }; // 0x26 - REQA 0x52 - WAKE-UP | |
1511 | uint8_t sel_all[] = { 0x93,0x20 }; | |
1512 | uint8_t sel_uid[] = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; | |
1513 | uint8_t rats[] = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0 | |
1514 | ||
1515 | uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes | |
1516 | ||
1517 | uint8_t sak = 0x04; // cascade uid | |
1518 | int cascade_level = 0; | |
1519 | ||
1520 | int len; | |
1521 | ||
1522 | // clear uid | |
1523 | memset(uid_ptr, 0, 8); | |
1524 | ||
1525 | // Broadcast for a card, WUPA (0x52) will force response from all cards in the field | |
1526 | ReaderTransmitShort(wupa); | |
1527 | // Receive the ATQA | |
1528 | if(!ReaderReceive(resp)) return 0; | |
1529 | ||
1530 | if(resp_data) | |
1531 | memcpy(resp_data->atqa, resp, 2); | |
1532 | ||
1533 | // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in | |
1534 | // which case we need to make a cascade 2 request and select - this is a long UID | |
1535 | // While the UID is not complete, the 3nd bit (from the right) is set in the SAK. | |
1536 | for(; sak & 0x04; cascade_level++) | |
1537 | { | |
1538 | // SELECT_* (L1: 0x93, L2: 0x95, L3: 0x97) | |
1539 | sel_uid[0] = sel_all[0] = 0x93 + cascade_level * 2; | |
1540 | ||
1541 | // SELECT_ALL | |
1542 | ReaderTransmit(sel_all,sizeof(sel_all)); | |
1543 | if (!ReaderReceive(resp)) return 0; | |
1544 | if(uid_ptr) memcpy(uid_ptr + cascade_level*4, resp, 4); | |
1545 | ||
1546 | // calculate crypto UID | |
1547 | if(cuid_ptr) *cuid_ptr = bytes_to_num(resp, 4); | |
1548 | ||
1549 | // Construct SELECT UID command | |
1550 | memcpy(sel_uid+2,resp,5); | |
1551 | AppendCrc14443a(sel_uid,7); | |
1552 | ReaderTransmit(sel_uid,sizeof(sel_uid)); | |
1553 | ||
1554 | // Receive the SAK | |
1555 | if (!ReaderReceive(resp)) return 0; | |
1556 | sak = resp[0]; | |
1557 | } | |
1558 | if(resp_data) { | |
1559 | resp_data->sak = sak; | |
1560 | resp_data->ats_len = 0; | |
1561 | } | |
1562 | //-- this byte not UID, it CT. http://www.nxp.com/documents/application_note/AN10927.pdf page 3 | |
1563 | if (uid_ptr[0] == 0x88) { | |
1564 | memcpy(uid_ptr, uid_ptr + 1, 7); | |
1565 | uid_ptr[7] = 0; | |
1566 | } | |
1567 | ||
1568 | if( (sak & 0x20) == 0) | |
1569 | return 2; // non iso14443a compliant tag | |
1570 | ||
1571 | // Request for answer to select | |
1572 | if(resp_data) { // JCOP cards - if reader sent RATS then there is no MIFARE session at all!!! | |
1573 | AppendCrc14443a(rats, 2); | |
1574 | ReaderTransmit(rats, sizeof(rats)); | |
1575 | ||
1576 | if (!(len = ReaderReceive(resp))) return 0; | |
1577 | ||
1578 | memcpy(resp_data->ats, resp, sizeof(resp_data->ats)); | |
1579 | resp_data->ats_len = len; | |
1580 | } | |
1581 | ||
1582 | return 1; | |
1583 | } | |
1584 | ||
1585 | void iso14443a_setup() { | |
1586 | // Setup SSC | |
1587 | FpgaSetupSsc(); | |
1588 | // Start from off (no field generated) | |
1589 | // Signal field is off with the appropriate LED | |
1590 | LED_D_OFF(); | |
1591 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1592 | SpinDelay(200); | |
1593 | ||
1594 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1595 | ||
1596 | // Now give it time to spin up. | |
1597 | // Signal field is on with the appropriate LED | |
1598 | LED_D_ON(); | |
1599 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1600 | SpinDelay(200); | |
1601 | ||
1602 | iso14a_timeout = 2048; //default | |
1603 | } | |
1604 | ||
1605 | int iso14_apdu(uint8_t * cmd, size_t cmd_len, void * data) { | |
1606 | uint8_t real_cmd[cmd_len+4]; | |
1607 | real_cmd[0] = 0x0a; //I-Block | |
1608 | real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards | |
1609 | memcpy(real_cmd+2, cmd, cmd_len); | |
1610 | AppendCrc14443a(real_cmd,cmd_len+2); | |
1611 | ||
1612 | ReaderTransmit(real_cmd, cmd_len+4); | |
1613 | size_t len = ReaderReceive(data); | |
1614 | if(!len) | |
1615 | return -1; //DATA LINK ERROR | |
1616 | ||
1617 | return len; | |
1618 | } | |
1619 | ||
1620 | ||
1621 | //----------------------------------------------------------------------------- | |
1622 | // Read an ISO 14443a tag. Send out commands and store answers. | |
1623 | // | |
1624 | //----------------------------------------------------------------------------- | |
1625 | void ReaderIso14443a(UsbCommand * c, UsbCommand * ack) | |
1626 | { | |
1627 | iso14a_command_t param = c->arg[0]; | |
1628 | uint8_t * cmd = c->d.asBytes; | |
1629 | size_t len = c->arg[1]; | |
1630 | ||
1631 | if(param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(1); | |
1632 | ||
1633 | if(param & ISO14A_CONNECT) { | |
1634 | iso14443a_setup(); | |
1635 | ack->arg[0] = iso14443a_select_card(ack->d.asBytes, (iso14a_card_select_t *) (ack->d.asBytes+12), NULL); | |
1636 | UsbSendPacket((void *)ack, sizeof(UsbCommand)); | |
1637 | } | |
1638 | ||
1639 | if(param & ISO14A_SET_TIMEOUT) { | |
1640 | iso14a_timeout = c->arg[2]; | |
1641 | } | |
1642 | ||
1643 | if(param & ISO14A_SET_TIMEOUT) { | |
1644 | iso14a_timeout = c->arg[2]; | |
1645 | } | |
1646 | ||
1647 | if(param & ISO14A_APDU) { | |
1648 | ack->arg[0] = iso14_apdu(cmd, len, ack->d.asBytes); | |
1649 | UsbSendPacket((void *)ack, sizeof(UsbCommand)); | |
1650 | } | |
1651 | ||
1652 | if(param & ISO14A_RAW) { | |
1653 | if(param & ISO14A_APPEND_CRC) { | |
1654 | AppendCrc14443a(cmd,len); | |
1655 | len += 2; | |
1656 | } | |
1657 | ReaderTransmit(cmd,len); | |
1658 | ack->arg[0] = ReaderReceive(ack->d.asBytes); | |
1659 | UsbSendPacket((void *)ack, sizeof(UsbCommand)); | |
1660 | } | |
1661 | ||
1662 | if(param & ISO14A_REQUEST_TRIGGER) iso14a_set_trigger(0); | |
1663 | ||
1664 | if(param & ISO14A_NO_DISCONNECT) | |
1665 | return; | |
1666 | ||
1667 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1668 | LEDsoff(); | |
1669 | } | |
1670 | //----------------------------------------------------------------------------- | |
1671 | // Read an ISO 14443a tag. Send out commands and store answers. | |
1672 | // | |
1673 | //----------------------------------------------------------------------------- | |
1674 | void ReaderMifare(uint32_t parameter) | |
1675 | { | |
1676 | // Mifare AUTH | |
1677 | uint8_t mf_auth[] = { 0x60,0x00,0xf5,0x7b }; | |
1678 | uint8_t mf_nr_ar[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }; | |
1679 | ||
1680 | uint8_t* receivedAnswer = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes | |
1681 | traceLen = 0; | |
1682 | tracing = false; | |
1683 | ||
1684 | iso14443a_setup(); | |
1685 | ||
1686 | LED_A_ON(); | |
1687 | LED_B_OFF(); | |
1688 | LED_C_OFF(); | |
1689 | ||
1690 | byte_t nt_diff = 0; | |
1691 | LED_A_OFF(); | |
1692 | byte_t par = 0; | |
1693 | byte_t par_mask = 0xff; | |
1694 | byte_t par_low = 0; | |
1695 | int led_on = TRUE; | |
1696 | uint8_t uid[8]; | |
1697 | uint32_t cuid; | |
1698 | ||
1699 | tracing = FALSE; | |
1700 | byte_t nt[4] = {0,0,0,0}; | |
1701 | byte_t nt_attacked[4]; | |
1702 | byte_t par_list[8] = {0,0,0,0,0,0,0,0}; | |
1703 | byte_t ks_list[8] = {0,0,0,0,0,0,0,0}; | |
1704 | num_to_bytes(parameter, 4, nt_attacked); | |
1705 | int isOK = 0, isNULL = 0; | |
1706 | ||
1707 | while(TRUE) | |
1708 | { | |
1709 | LED_C_ON(); | |
1710 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1711 | SpinDelay(200); | |
1712 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1713 | LED_C_OFF(); | |
1714 | ||
1715 | // Test if the action was cancelled | |
1716 | if(BUTTON_PRESS()) { | |
1717 | break; | |
1718 | } | |
1719 | ||
1720 | if(!iso14443a_select_card(uid, NULL, &cuid)) continue; | |
1721 | ||
1722 | // Transmit MIFARE_CLASSIC_AUTH | |
1723 | ReaderTransmit(mf_auth, sizeof(mf_auth)); | |
1724 | ||
1725 | // Receive the (16 bit) "random" nonce | |
1726 | if (!ReaderReceive(receivedAnswer)) continue; | |
1727 | memcpy(nt, receivedAnswer, 4); | |
1728 | ||
1729 | // Transmit reader nonce and reader answer | |
1730 | ReaderTransmitPar(mf_nr_ar, sizeof(mf_nr_ar),par); | |
1731 | ||
1732 | // Receive 4 bit answer | |
1733 | if (ReaderReceive(receivedAnswer)) | |
1734 | { | |
1735 | isNULL = (nt_attacked[0] = 0) && (nt_attacked[1] = 0) && (nt_attacked[2] = 0) && (nt_attacked[3] = 0); | |
1736 | if ( (isNULL != 0 ) && (memcmp(nt, nt_attacked, 4) != 0) ) continue; | |
1737 | ||
1738 | if (nt_diff == 0) | |
1739 | { | |
1740 | LED_A_ON(); | |
1741 | memcpy(nt_attacked, nt, 4); | |
1742 | par_mask = 0xf8; | |
1743 | par_low = par & 0x07; | |
1744 | } | |
1745 | ||
1746 | led_on = !led_on; | |
1747 | if(led_on) LED_B_ON(); else LED_B_OFF(); | |
1748 | par_list[nt_diff] = par; | |
1749 | ks_list[nt_diff] = receivedAnswer[0] ^ 0x05; | |
1750 | ||
1751 | // Test if the information is complete | |
1752 | if (nt_diff == 0x07) { | |
1753 | isOK = 1; | |
1754 | break; | |
1755 | } | |
1756 | ||
1757 | nt_diff = (nt_diff + 1) & 0x07; | |
1758 | mf_nr_ar[3] = nt_diff << 5; | |
1759 | par = par_low; | |
1760 | } else { | |
1761 | if (nt_diff == 0) | |
1762 | { | |
1763 | par++; | |
1764 | } else { | |
1765 | par = (((par >> 3) + 1) << 3) | par_low; | |
1766 | } | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | LogTrace(nt, 4, 0, GetParity(nt, 4), TRUE); | |
1771 | LogTrace(par_list, 8, 0, GetParity(par_list, 8), TRUE); | |
1772 | LogTrace(ks_list, 8, 0, GetParity(ks_list, 8), TRUE); | |
1773 | ||
1774 | UsbCommand ack = {CMD_ACK, {isOK, 0, 0}}; | |
1775 | memcpy(ack.d.asBytes + 0, uid, 4); | |
1776 | memcpy(ack.d.asBytes + 4, nt, 4); | |
1777 | memcpy(ack.d.asBytes + 8, par_list, 8); | |
1778 | memcpy(ack.d.asBytes + 16, ks_list, 8); | |
1779 | ||
1780 | LED_B_ON(); | |
1781 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
1782 | LED_B_OFF(); | |
1783 | ||
1784 | // Thats it... | |
1785 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1786 | LEDsoff(); | |
1787 | tracing = TRUE; | |
1788 | ||
1789 | // DbpString("COMMAND mifare FINISHED"); | |
1790 | } | |
1791 | ||
1792 | //----------------------------------------------------------------------------- | |
1793 | // Select, Authenticaate, Read an MIFARE tag. | |
1794 | // read block | |
1795 | //----------------------------------------------------------------------------- | |
1796 | void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) | |
1797 | { | |
1798 | // params | |
1799 | uint8_t blockNo = arg0; | |
1800 | uint8_t keyType = arg1; | |
1801 | uint64_t ui64Key = 0; | |
1802 | ui64Key = bytes_to_num(datain, 6); | |
1803 | ||
1804 | // variables | |
1805 | byte_t isOK = 0; | |
1806 | byte_t dataoutbuf[16]; | |
1807 | uint8_t uid[8]; | |
1808 | uint32_t cuid; | |
1809 | struct Crypto1State mpcs = {0, 0}; | |
1810 | struct Crypto1State *pcs; | |
1811 | pcs = &mpcs; | |
1812 | ||
1813 | // clear trace | |
1814 | traceLen = 0; | |
1815 | // tracing = false; | |
1816 | ||
1817 | iso14443a_setup(); | |
1818 | ||
1819 | LED_A_ON(); | |
1820 | LED_B_OFF(); | |
1821 | LED_C_OFF(); | |
1822 | ||
1823 | while (true) { | |
1824 | if(!iso14443a_select_card(uid, NULL, &cuid)) { | |
1825 | Dbprintf("Can't select card"); | |
1826 | break; | |
1827 | }; | |
1828 | ||
1829 | if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) { | |
1830 | Dbprintf("Auth error"); | |
1831 | break; | |
1832 | }; | |
1833 | ||
1834 | if(mifare_classic_readblock(pcs, cuid, blockNo, dataoutbuf)) { | |
1835 | Dbprintf("Read block error"); | |
1836 | break; | |
1837 | }; | |
1838 | ||
1839 | if(mifare_classic_halt(pcs, cuid)) { | |
1840 | Dbprintf("Halt error"); | |
1841 | break; | |
1842 | }; | |
1843 | ||
1844 | isOK = 1; | |
1845 | break; | |
1846 | } | |
1847 | ||
1848 | // ----------------------------- crypto1 destroy | |
1849 | crypto1_destroy(pcs); | |
1850 | ||
1851 | // DbpString("READ BLOCK FINISHED"); | |
1852 | ||
1853 | // add trace trailer | |
1854 | uid[0] = 0xff; | |
1855 | uid[1] = 0xff; | |
1856 | uid[2] = 0xff; | |
1857 | uid[3] = 0xff; | |
1858 | LogTrace(uid, 4, 0, 0, TRUE); | |
1859 | ||
1860 | UsbCommand ack = {CMD_ACK, {isOK, 0, 0}}; | |
1861 | memcpy(ack.d.asBytes, dataoutbuf, 16); | |
1862 | ||
1863 | LED_B_ON(); | |
1864 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
1865 | LED_B_OFF(); | |
1866 | ||
1867 | ||
1868 | // Thats it... | |
1869 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1870 | LEDsoff(); | |
1871 | // tracing = TRUE; | |
1872 | ||
1873 | } | |
1874 | ||
1875 | //----------------------------------------------------------------------------- | |
1876 | // Select, Authenticaate, Read an MIFARE tag. | |
1877 | // read sector (data = 4 x 16 bytes = 64 bytes) | |
1878 | //----------------------------------------------------------------------------- | |
1879 | void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) | |
1880 | { | |
1881 | // params | |
1882 | uint8_t sectorNo = arg0; | |
1883 | uint8_t keyType = arg1; | |
1884 | uint64_t ui64Key = 0; | |
1885 | ui64Key = bytes_to_num(datain, 6); | |
1886 | ||
1887 | // variables | |
1888 | byte_t isOK = 0; | |
1889 | byte_t dataoutbuf[16 * 4]; | |
1890 | uint8_t uid[8]; | |
1891 | uint32_t cuid; | |
1892 | struct Crypto1State mpcs = {0, 0}; | |
1893 | struct Crypto1State *pcs; | |
1894 | pcs = &mpcs; | |
1895 | ||
1896 | // clear trace | |
1897 | traceLen = 0; | |
1898 | // tracing = false; | |
1899 | ||
1900 | iso14443a_setup(); | |
1901 | ||
1902 | LED_A_ON(); | |
1903 | LED_B_OFF(); | |
1904 | LED_C_OFF(); | |
1905 | ||
1906 | while (true) { | |
1907 | if(!iso14443a_select_card(uid, NULL, &cuid)) { | |
1908 | Dbprintf("Can't select card"); | |
1909 | break; | |
1910 | }; | |
1911 | ||
1912 | if(mifare_classic_auth(pcs, cuid, sectorNo * 4, keyType, ui64Key, AUTH_FIRST)) { | |
1913 | Dbprintf("Auth error"); | |
1914 | break; | |
1915 | }; | |
1916 | ||
1917 | if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 0, dataoutbuf + 16 * 0)) { | |
1918 | Dbprintf("Read block 0 error"); | |
1919 | break; | |
1920 | }; | |
1921 | if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 1, dataoutbuf + 16 * 1)) { | |
1922 | Dbprintf("Read block 1 error"); | |
1923 | break; | |
1924 | }; | |
1925 | if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 2, dataoutbuf + 16 * 2)) { | |
1926 | Dbprintf("Read block 2 error"); | |
1927 | break; | |
1928 | }; | |
1929 | if(mifare_classic_readblock(pcs, cuid, sectorNo * 4 + 3, dataoutbuf + 16 * 3)) { | |
1930 | Dbprintf("Read block 3 error"); | |
1931 | break; | |
1932 | }; | |
1933 | ||
1934 | if(mifare_classic_halt(pcs, cuid)) { | |
1935 | Dbprintf("Halt error"); | |
1936 | break; | |
1937 | }; | |
1938 | ||
1939 | isOK = 1; | |
1940 | break; | |
1941 | } | |
1942 | ||
1943 | // ----------------------------- crypto1 destroy | |
1944 | crypto1_destroy(pcs); | |
1945 | ||
1946 | // DbpString("READ BLOCK FINISHED"); | |
1947 | ||
1948 | // add trace trailer | |
1949 | uid[0] = 0xff; | |
1950 | uid[1] = 0xff; | |
1951 | uid[2] = 0xff; | |
1952 | uid[3] = 0xff; | |
1953 | LogTrace(uid, 4, 0, 0, TRUE); | |
1954 | ||
1955 | UsbCommand ack = {CMD_ACK, {isOK, 0, 0}}; | |
1956 | memcpy(ack.d.asBytes, dataoutbuf, 16 * 2); | |
1957 | ||
1958 | LED_B_ON(); | |
1959 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
1960 | ||
1961 | SpinDelay(100); | |
1962 | ||
1963 | memcpy(ack.d.asBytes, dataoutbuf + 16 * 2, 16 * 2); | |
1964 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
1965 | LED_B_OFF(); | |
1966 | ||
1967 | // Thats it... | |
1968 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1969 | LEDsoff(); | |
1970 | // tracing = TRUE; | |
1971 | ||
1972 | } | |
1973 | ||
1974 | //----------------------------------------------------------------------------- | |
1975 | // Select, Authenticaate, Read an MIFARE tag. | |
1976 | // read block | |
1977 | //----------------------------------------------------------------------------- | |
1978 | void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) | |
1979 | { | |
1980 | // params | |
1981 | uint8_t blockNo = arg0; | |
1982 | uint8_t keyType = arg1; | |
1983 | uint64_t ui64Key = 0; | |
1984 | byte_t blockdata[16]; | |
1985 | ||
1986 | ui64Key = bytes_to_num(datain, 6); | |
1987 | memcpy(blockdata, datain + 10, 16); | |
1988 | ||
1989 | // variables | |
1990 | byte_t isOK = 0; | |
1991 | uint8_t uid[8]; | |
1992 | uint32_t cuid; | |
1993 | struct Crypto1State mpcs = {0, 0}; | |
1994 | struct Crypto1State *pcs; | |
1995 | pcs = &mpcs; | |
1996 | ||
1997 | // clear trace | |
1998 | traceLen = 0; | |
1999 | // tracing = false; | |
2000 | ||
2001 | iso14443a_setup(); | |
2002 | ||
2003 | LED_A_ON(); | |
2004 | LED_B_OFF(); | |
2005 | LED_C_OFF(); | |
2006 | ||
2007 | while (true) { | |
2008 | if(!iso14443a_select_card(uid, NULL, &cuid)) { | |
2009 | Dbprintf("Can't select card"); | |
2010 | break; | |
2011 | }; | |
2012 | ||
2013 | if(mifare_classic_auth(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST)) { | |
2014 | Dbprintf("Auth error"); | |
2015 | break; | |
2016 | }; | |
2017 | ||
2018 | if(mifare_classic_writeblock(pcs, cuid, blockNo, blockdata)) { | |
2019 | Dbprintf("Write block error"); | |
2020 | break; | |
2021 | }; | |
2022 | ||
2023 | if(mifare_classic_halt(pcs, cuid)) { | |
2024 | Dbprintf("Halt error"); | |
2025 | break; | |
2026 | }; | |
2027 | ||
2028 | isOK = 1; | |
2029 | break; | |
2030 | } | |
2031 | ||
2032 | // ----------------------------- crypto1 destroy | |
2033 | crypto1_destroy(pcs); | |
2034 | ||
2035 | // DbpString("WRITE BLOCK FINISHED"); | |
2036 | ||
2037 | // add trace trailer | |
2038 | uid[0] = 0xff; | |
2039 | uid[1] = 0xff; | |
2040 | uid[2] = 0xff; | |
2041 | uid[3] = 0xff; | |
2042 | LogTrace(uid, 4, 0, 0, TRUE); | |
2043 | ||
2044 | UsbCommand ack = {CMD_ACK, {isOK, 0, 0}}; | |
2045 | ||
2046 | LED_B_ON(); | |
2047 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
2048 | LED_B_OFF(); | |
2049 | ||
2050 | ||
2051 | // Thats it... | |
2052 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2053 | LEDsoff(); | |
2054 | // tracing = TRUE; | |
2055 | ||
2056 | } | |
2057 | ||
2058 | // Return 1 if the nonce is invalid else return 0 | |
2059 | int valid_nonce(uint32_t Nt, uint32_t NtEnc, uint32_t Ks1, byte_t * parity) { | |
2060 | return ((oddparity((Nt >> 24) & 0xFF) == ((parity[0]) ^ oddparity((NtEnc >> 24) & 0xFF) ^ BIT(Ks1,16))) & \ | |
2061 | (oddparity((Nt >> 16) & 0xFF) == ((parity[1]) ^ oddparity((NtEnc >> 16) & 0xFF) ^ BIT(Ks1,8))) & \ | |
2062 | (oddparity((Nt >> 8) & 0xFF) == ((parity[2]) ^ oddparity((NtEnc >> 8) & 0xFF) ^ BIT(Ks1,0)))) ? 1 : 0; | |
2063 | } | |
2064 | ||
2065 | ||
2066 | //----------------------------------------------------------------------------- | |
2067 | // MIFARE nested authentication. | |
2068 | // | |
2069 | //----------------------------------------------------------------------------- | |
2070 | void MifareNested(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) | |
2071 | { | |
2072 | // params | |
2073 | uint8_t blockNo = arg0; | |
2074 | uint8_t keyType = arg1; | |
2075 | uint64_t ui64Key = 0; | |
2076 | ||
2077 | ui64Key = bytes_to_num(datain, 6); | |
2078 | ||
2079 | // variables | |
2080 | uint8_t targetBlockNo = blockNo + 1; | |
2081 | uint8_t targetKeyType = keyType; | |
2082 | int rtr, i, j, m, len; | |
2083 | int davg, dmin, dmax; | |
2084 | uint8_t uid[8]; | |
2085 | uint32_t cuid, nt1, nt2, nttmp, nttest, par, ks1; | |
2086 | uint8_t par_array[4]; | |
2087 | nestedVector nvector[3][10]; | |
2088 | int nvectorcount[3] = {10, 10, 10}; | |
2089 | int ncount = 0; | |
2090 | UsbCommand ack = {CMD_ACK, {0, 0, 0}}; | |
2091 | struct Crypto1State mpcs = {0, 0}; | |
2092 | struct Crypto1State *pcs; | |
2093 | pcs = &mpcs; | |
2094 | uint8_t* receivedAnswer = mifare_get_bigbufptr(); | |
2095 | ||
2096 | // clear trace | |
2097 | traceLen = 0; | |
2098 | tracing = false; | |
2099 | ||
2100 | iso14443a_setup(); | |
2101 | ||
2102 | LED_A_ON(); | |
2103 | LED_B_ON(); | |
2104 | LED_C_OFF(); | |
2105 | ||
2106 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2107 | SpinDelay(200); | |
2108 | ||
2109 | davg = dmax = 0; | |
2110 | dmin = 2000; | |
2111 | ||
2112 | // test nonce distance | |
2113 | for (rtr = 0; rtr < 10; rtr++) { | |
2114 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2115 | SpinDelay(100); | |
2116 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
2117 | ||
2118 | // Test if the action was cancelled | |
2119 | if(BUTTON_PRESS()) { | |
2120 | break; | |
2121 | } | |
2122 | ||
2123 | if(!iso14443a_select_card(uid, NULL, &cuid)) { | |
2124 | Dbprintf("Can't select card"); | |
2125 | break; | |
2126 | }; | |
2127 | ||
2128 | if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) { | |
2129 | Dbprintf("Auth1 error"); | |
2130 | break; | |
2131 | }; | |
2132 | ||
2133 | if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_NESTED, &nt2)) { | |
2134 | Dbprintf("Auth2 error"); | |
2135 | break; | |
2136 | }; | |
2137 | ||
2138 | nttmp = prng_successor(nt1, 500); | |
2139 | for (i = 501; i < 2000; i++) { | |
2140 | nttmp = prng_successor(nttmp, 1); | |
2141 | if (nttmp == nt2) break; | |
2142 | } | |
2143 | ||
2144 | if (i != 2000) { | |
2145 | davg += i; | |
2146 | if (dmin > i) dmin = i; | |
2147 | if (dmax < i) dmax = i; | |
2148 | // Dbprintf("r=%d nt1=%08x nt2=%08x distance=%d", rtr, nt1, nt2, i); | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | if (rtr == 0) return; | |
2153 | ||
2154 | davg = davg / rtr; | |
2155 | Dbprintf("distance: min=%d max=%d avg=%d", dmin, dmax, davg); | |
2156 | ||
2157 | LED_B_OFF(); | |
2158 | ||
2159 | tracing = true; | |
2160 | ||
2161 | LED_C_ON(); | |
2162 | ||
2163 | // get crypted nonces for target sector | |
2164 | for (rtr = 0; rtr < 2; rtr++) { | |
2165 | // Dbprintf("------------------------------"); | |
2166 | ||
2167 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2168 | SpinDelay(100); | |
2169 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
2170 | ||
2171 | // Test if the action was cancelled | |
2172 | if(BUTTON_PRESS()) { | |
2173 | break; | |
2174 | } | |
2175 | ||
2176 | if(!iso14443a_select_card(uid, NULL, &cuid)) { | |
2177 | Dbprintf("Can't select card"); | |
2178 | break; | |
2179 | }; | |
2180 | ||
2181 | if(mifare_classic_authex(pcs, cuid, blockNo, keyType, ui64Key, AUTH_FIRST, &nt1)) { | |
2182 | Dbprintf("Auth1 error"); | |
2183 | break; | |
2184 | }; | |
2185 | ||
2186 | // nested authentication | |
2187 | len = mifare_sendcmd_shortex(pcs, AUTH_NESTED, 0x60 + (targetKeyType & 0x01), targetBlockNo, receivedAnswer, &par); | |
2188 | if (len != 4) { | |
2189 | Dbprintf("Auth2 error len=%d", len); | |
2190 | break; | |
2191 | }; | |
2192 | ||
2193 | nt2 = bytes_to_num(receivedAnswer, 4); | |
2194 | // Dbprintf("r=%d nt1=%08x nt2enc=%08x nt2par=%08x", rtr, nt1, nt2, par); | |
2195 | ||
2196 | // ----------------------- test | |
2197 | /* uint32_t d_nt, d_ks1, d_ks2, d_ks3, reader_challenge; | |
2198 | byte_t ar[4]; | |
2199 | ||
2200 | ar[0] = 0x55; | |
2201 | ar[1] = 0x41; | |
2202 | ar[2] = 0x49; | |
2203 | ar[3] = 0x92; | |
2204 | ||
2205 | crypto1_destroy(pcs); | |
2206 | crypto1_create(pcs, ui64Key); | |
2207 | ||
2208 | // decrypt nt with help of new key | |
2209 | d_nt = crypto1_word(pcs, nt2 ^ cuid, 1) ^ nt2; | |
2210 | ||
2211 | reader_challenge = d_nt;//(uint32_t)bytes_to_num(ar, 4); | |
2212 | d_ks1 = crypto1_word(pcs, reader_challenge, 0); | |
2213 | d_ks2 = crypto1_word(pcs, 0, 0); | |
2214 | d_ks3 = crypto1_word(pcs, 0,0); | |
2215 | ||
2216 | Dbprintf("TST: ks1=%08x nt=%08x", d_ks1, d_nt);*/ | |
2217 | // ----------------------- test | |
2218 | ||
2219 | // Parity validity check | |
2220 | for (i = 0; i < 4; i++) { | |
2221 | par_array[i] = (oddparity(receivedAnswer[i]) != ((par & 0x08) >> 3)); | |
2222 | par = par << 1; | |
2223 | } | |
2224 | ||
2225 | ncount = 0; | |
2226 | for (m = dmin - 10; m < dmax + 10; m++) { | |
2227 | nttest = prng_successor(nt1, m); | |
2228 | ks1 = nt2 ^ nttest; | |
2229 | ||
2230 | //-------------------------------------- test | |
2231 | /* if (nttest == d_nt){ | |
2232 | Dbprintf("nttest=d_nt! m=%d ks1=%08x nttest=%08x", m, ks1, nttest); | |
2233 | }*/ | |
2234 | //-------------------------------------- test | |
2235 | if (valid_nonce(nttest, nt2, ks1, par_array) && (ncount < 11)){ | |
2236 | ||
2237 | nvector[2][ncount].nt = nttest; | |
2238 | nvector[2][ncount].ks1 = ks1; | |
2239 | ncount++; | |
2240 | nvectorcount[2] = ncount; | |
2241 | ||
2242 | // Dbprintf("valid m=%d ks1=%08x nttest=%08x", m, ks1, nttest); | |
2243 | } | |
2244 | ||
2245 | } | |
2246 | ||
2247 | // select vector with length less than got | |
2248 | if (nvectorcount[2] != 0) { | |
2249 | m = 2; | |
2250 | if (nvectorcount[2] < nvectorcount[1]) m = 1; | |
2251 | if (nvectorcount[2] < nvectorcount[0]) m = 0; | |
2252 | if (m != 2) { | |
2253 | for (i = 0; i < nvectorcount[m]; i++) { | |
2254 | nvector[m][i] = nvector[2][i]; | |
2255 | } | |
2256 | nvectorcount[m] = nvectorcount[2]; | |
2257 | } | |
2258 | } | |
2259 | ||
2260 | // Dbprintf("vector count: 1=%d 2=%d 3=%d", nvectorcount[0], nvectorcount[1], nvectorcount[2]); | |
2261 | } | |
2262 | ||
2263 | LED_C_OFF(); | |
2264 | ||
2265 | ||
2266 | // ----------------------------- crypto1 destroy | |
2267 | crypto1_destroy(pcs); | |
2268 | ||
2269 | // add trace trailer | |
2270 | uid[0] = 0xff; | |
2271 | uid[1] = 0xff; | |
2272 | uid[2] = 0xff; | |
2273 | uid[3] = 0xff; | |
2274 | LogTrace(uid, 4, 0, 0, TRUE); | |
2275 | ||
2276 | for (i = 0; i < 2; i++) { | |
2277 | for (j = 0; j < nvectorcount[i]; j += 5) { | |
2278 | ncount = nvectorcount[i] - j; | |
2279 | if (ncount > 5) ncount = 5; | |
2280 | ||
2281 | ack.arg[0] = 0; // isEOF = 0 | |
2282 | ack.arg[1] = ncount; | |
2283 | ack.arg[2] = targetBlockNo + (targetKeyType * 0x100); | |
2284 | memset(ack.d.asBytes, 0x00, sizeof(ack.d.asBytes)); | |
2285 | ||
2286 | memcpy(ack.d.asBytes, &cuid, 4); | |
2287 | for (m = 0; m < ncount; m++) { | |
2288 | memcpy(ack.d.asBytes + 8 + m * 8 + 0, &nvector[i][m + j].nt, 4); | |
2289 | memcpy(ack.d.asBytes + 8 + m * 8 + 4, &nvector[i][m + j].ks1, 4); | |
2290 | } | |
2291 | ||
2292 | LED_B_ON(); | |
2293 | SpinDelay(100); | |
2294 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
2295 | LED_B_OFF(); | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | // finalize list | |
2300 | ack.arg[0] = 1; // isEOF = 1 | |
2301 | ack.arg[1] = 0; | |
2302 | ack.arg[2] = 0; | |
2303 | memset(ack.d.asBytes, 0x00, sizeof(ack.d.asBytes)); | |
2304 | ||
2305 | LED_B_ON(); | |
2306 | SpinDelay(300); | |
2307 | UsbSendPacket((uint8_t *)&ack, sizeof(UsbCommand)); | |
2308 | LED_B_OFF(); | |
2309 | ||
2310 | DbpString("NESTED FINISHED"); | |
2311 | ||
2312 | // Thats it... | |
2313 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
2314 | LEDsoff(); | |
2315 | // tracing = TRUE; | |
2316 | ||
2317 | } | |
2318 | ||
2319 | //----------------------------------------------------------------------------- | |
2320 | // MIFARE 1K simulate. | |
2321 | // | |
2322 | //----------------------------------------------------------------------------- | |
2323 | void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain) | |
2324 | { | |
2325 | int cardSTATE = MFEMUL_NOFIELD; | |
2326 | ||
2327 | while (true) { | |
2328 | ||
2329 | if(BUTTON_PRESS()) { | |
2330 | break; | |
2331 | } | |
2332 | ||
2333 | switch (cardSTATE) { | |
2334 | case MFEMUL_NOFIELD:{ | |
2335 | break; | |
2336 | } | |
2337 | case MFEMUL_IDLE:{ | |
2338 | break; | |
2339 | } | |
2340 | case MFEMUL_SELECT1:{ | |
2341 | break; | |
2342 | } | |
2343 | case MFEMUL_SELECT2:{ | |
2344 | break; | |
2345 | } | |
2346 | case MFEMUL_AUTH1:{ | |
2347 | break; | |
2348 | } | |
2349 | case MFEMUL_AUTH2:{ | |
2350 | break; | |
2351 | } | |
2352 | case MFEMUL_HALTED:{ | |
2353 | break; | |
2354 | } | |
2355 | ||
2356 | } | |
2357 | ||
2358 | } | |
2359 | ||
2360 | } |