]>
Commit | Line | Data |
---|---|---|
1 | //----------------------------------------------------------------------------- | |
2 | // Jonathan Westhues, split Nov 2006 | |
3 | // Modified by Greg Jones, Jan 2009 | |
4 | // Modified by Adrian Dabrowski "atrox", Mar-Sept 2010,Oct 2011 | |
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 15693. This includes both the reader software and | |
11 | // the `fake tag' modes, but at the moment I've implemented only the reader | |
12 | // stuff, and that barely. | |
13 | // Modified to perform modulation onboard in arm rather than on PC | |
14 | // Also added additional reader commands (SELECT, READ etc.) | |
15 | //----------------------------------------------------------------------------- | |
16 | // The ISO 15693 describes two transmission modes from reader to tag, and 4 | |
17 | // transmission modes from tag to reader. As of Mar 2010 this code only | |
18 | // supports one of each: "1of4" mode from reader to tag, and the highspeed | |
19 | // variant with one subcarrier from card to reader. | |
20 | // As long, as the card fully support ISO 15693 this is no problem, since the | |
21 | // reader chooses both data rates, but some non-standard tags do not. Further for | |
22 | // the simulation to work, we will need to support all data rates. | |
23 | // | |
24 | // VCD (reader) -> VICC (tag) | |
25 | // 1 out of 256: | |
26 | // data rate: 1,66 kbit/s (fc/8192) | |
27 | // used for long range | |
28 | // 1 out of 4: | |
29 | // data rate: 26,48 kbit/s (fc/512) | |
30 | // used for short range, high speed | |
31 | // | |
32 | // VICC (tag) -> VCD (reader) | |
33 | // Modulation: | |
34 | // ASK / one subcarrier (423,75 khz) | |
35 | // FSK / two subcarriers (423,75 khz && 484,28 khz) | |
36 | // Data Rates / Modes: | |
37 | // low ASK: 6,62 kbit/s | |
38 | // low FSK: 6.67 kbit/s | |
39 | // high ASK: 26,48 kbit/s | |
40 | // high FSK: 26,69 kbit/s | |
41 | //----------------------------------------------------------------------------- | |
42 | // added "1 out of 256" mode (for VCD->PICC) - atrox 20100911 | |
43 | ||
44 | ||
45 | // Random Remarks: | |
46 | // *) UID is always used "transmission order" (LSB), which is reverse to display order | |
47 | ||
48 | // TODO / BUGS / ISSUES: | |
49 | // *) writing to tags takes longer: we miss the answer from the tag in most cases | |
50 | // -> tweak the read-timeout times | |
51 | // *) signal decoding from the card is still a bit shaky. | |
52 | // *) signal decoding is unable to detect collissions. | |
53 | // *) add anti-collission support for inventory-commands | |
54 | // *) read security status of a block | |
55 | // *) sniffing and simulation do only support one transmission mode. need to support | |
56 | // all 8 transmission combinations | |
57 | // *) remove or refactor code under "depricated" | |
58 | // *) document all the functions | |
59 | ||
60 | ||
61 | #include "proxmark3.h" | |
62 | #include "util.h" | |
63 | #include "apps.h" | |
64 | #include "string.h" | |
65 | #include "iso15693tools.h" | |
66 | #include "cmd.h" | |
67 | ||
68 | #define arraylen(x) (sizeof(x)/sizeof((x)[0])) | |
69 | ||
70 | static int DEBUG = 0; | |
71 | ||
72 | /////////////////////////////////////////////////////////////////////// | |
73 | // ISO 15693 Part 2 - Air Interface | |
74 | // This section basicly contains transmission and receiving of bits | |
75 | /////////////////////////////////////////////////////////////////////// | |
76 | ||
77 | #define FrameSOF Iso15693FrameSOF | |
78 | #define Logic0 Iso15693Logic0 | |
79 | #define Logic1 Iso15693Logic1 | |
80 | #define FrameEOF Iso15693FrameEOF | |
81 | ||
82 | #define Crc(data,datalen) Iso15693Crc(data,datalen) | |
83 | #define AddCrc(data,datalen) Iso15693AddCrc(data,datalen) | |
84 | #define sprintUID(target,uid) Iso15693sprintUID(target,uid) | |
85 | ||
86 | // approximate amplitude=sqrt(ci^2+cq^2) | |
87 | #define AMPLITUDE(ci, cq) (MAX(ABS(ci), ABS(cq)) + MIN(ABS(ci), ABS(cq))/2) | |
88 | ||
89 | // DMA buffer | |
90 | #define ISO15693_DMA_BUFFER_SIZE 128 | |
91 | ||
92 | // --------------------------- | |
93 | // Signal Processing | |
94 | // --------------------------- | |
95 | ||
96 | // prepare data using "1 out of 4" code for later transmission | |
97 | // resulting data rate is 26,48 kbit/s (fc/512) | |
98 | // cmd ... data | |
99 | // n ... length of data | |
100 | static void CodeIso15693AsReader(uint8_t *cmd, int n) | |
101 | { | |
102 | int i, j; | |
103 | ||
104 | ToSendReset(); | |
105 | ||
106 | // Give it a bit of slack at the beginning | |
107 | for(i = 0; i < 24; i++) { | |
108 | ToSendStuffBit(1); | |
109 | } | |
110 | ||
111 | // SOF for 1of4 | |
112 | ToSendStuffBit(0); | |
113 | ToSendStuffBit(1); | |
114 | ToSendStuffBit(1); | |
115 | ToSendStuffBit(1); | |
116 | ToSendStuffBit(1); | |
117 | ToSendStuffBit(0); | |
118 | ToSendStuffBit(1); | |
119 | ToSendStuffBit(1); | |
120 | for(i = 0; i < n; i++) { | |
121 | for(j = 0; j < 8; j += 2) { | |
122 | int these = (cmd[i] >> j) & 3; | |
123 | switch(these) { | |
124 | case 0: | |
125 | ToSendStuffBit(1); | |
126 | ToSendStuffBit(0); | |
127 | ToSendStuffBit(1); | |
128 | ToSendStuffBit(1); | |
129 | ToSendStuffBit(1); | |
130 | ToSendStuffBit(1); | |
131 | ToSendStuffBit(1); | |
132 | ToSendStuffBit(1); | |
133 | break; | |
134 | case 1: | |
135 | ToSendStuffBit(1); | |
136 | ToSendStuffBit(1); | |
137 | ToSendStuffBit(1); | |
138 | ToSendStuffBit(0); | |
139 | ToSendStuffBit(1); | |
140 | ToSendStuffBit(1); | |
141 | ToSendStuffBit(1); | |
142 | ToSendStuffBit(1); | |
143 | break; | |
144 | case 2: | |
145 | ToSendStuffBit(1); | |
146 | ToSendStuffBit(1); | |
147 | ToSendStuffBit(1); | |
148 | ToSendStuffBit(1); | |
149 | ToSendStuffBit(1); | |
150 | ToSendStuffBit(0); | |
151 | ToSendStuffBit(1); | |
152 | ToSendStuffBit(1); | |
153 | break; | |
154 | case 3: | |
155 | ToSendStuffBit(1); | |
156 | ToSendStuffBit(1); | |
157 | ToSendStuffBit(1); | |
158 | ToSendStuffBit(1); | |
159 | ToSendStuffBit(1); | |
160 | ToSendStuffBit(1); | |
161 | ToSendStuffBit(1); | |
162 | ToSendStuffBit(0); | |
163 | break; | |
164 | } | |
165 | } | |
166 | } | |
167 | // EOF | |
168 | ToSendStuffBit(1); | |
169 | ToSendStuffBit(1); | |
170 | ToSendStuffBit(0); | |
171 | ToSendStuffBit(1); | |
172 | ||
173 | // Fill remainder of last byte with 1 | |
174 | for(i = 0; i < 4; i++) { | |
175 | ToSendStuffBit(1); | |
176 | } | |
177 | ||
178 | ToSendMax++; | |
179 | } | |
180 | ||
181 | // encode data using "1 out of 256" scheme | |
182 | // data rate is 1,66 kbit/s (fc/8192) | |
183 | // is designed for more robust communication over longer distances | |
184 | static void CodeIso15693AsReader256(uint8_t *cmd, int n) | |
185 | { | |
186 | int i, j; | |
187 | ||
188 | ToSendReset(); | |
189 | ||
190 | // Give it a bit of slack at the beginning | |
191 | for(i = 0; i < 24; i++) { | |
192 | ToSendStuffBit(1); | |
193 | } | |
194 | ||
195 | // SOF for 1of256 | |
196 | ToSendStuffBit(0); | |
197 | ToSendStuffBit(1); | |
198 | ToSendStuffBit(1); | |
199 | ToSendStuffBit(1); | |
200 | ToSendStuffBit(1); | |
201 | ToSendStuffBit(1); | |
202 | ToSendStuffBit(1); | |
203 | ToSendStuffBit(0); | |
204 | ||
205 | for(i = 0; i < n; i++) { | |
206 | for (j = 0; j<=255; j++) { | |
207 | if (cmd[i]==j) { | |
208 | ToSendStuffBit(1); | |
209 | ToSendStuffBit(0); | |
210 | } else { | |
211 | ToSendStuffBit(1); | |
212 | ToSendStuffBit(1); | |
213 | } | |
214 | } | |
215 | } | |
216 | // EOF | |
217 | ToSendStuffBit(1); | |
218 | ToSendStuffBit(1); | |
219 | ToSendStuffBit(0); | |
220 | ToSendStuffBit(1); | |
221 | ||
222 | // And slack at the end, too. | |
223 | for(i = 0; i < 24; i++) { | |
224 | ToSendStuffBit(1); | |
225 | } | |
226 | } | |
227 | ||
228 | ||
229 | // Transmit the command (to the tag) that was placed in cmd[]. | |
230 | static void TransmitTo15693Tag(const uint8_t *cmd, int len) | |
231 | { | |
232 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX); | |
233 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX); | |
234 | ||
235 | LED_B_ON(); | |
236 | for(int c = 0; c < len; ) { | |
237 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
238 | AT91C_BASE_SSC->SSC_THR = ~cmd[c]; | |
239 | c++; | |
240 | } | |
241 | WDT_HIT(); | |
242 | } | |
243 | LED_B_OFF(); | |
244 | } | |
245 | ||
246 | //----------------------------------------------------------------------------- | |
247 | // Transmit the command (to the reader) that was placed in cmd[]. | |
248 | //----------------------------------------------------------------------------- | |
249 | static void TransmitTo15693Reader(const uint8_t *cmd, int len) | |
250 | { | |
251 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K); | |
252 | ||
253 | LED_C_ON(); | |
254 | for(int c = 0; c < len; ) { | |
255 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
256 | AT91C_BASE_SSC->SSC_THR = cmd[c]; | |
257 | c++; | |
258 | } | |
259 | WDT_HIT(); | |
260 | } | |
261 | LED_C_OFF(); | |
262 | } | |
263 | ||
264 | ||
265 | //============================================================================= | |
266 | // An ISO 15693 demodulator (one subcarrier only). Uses cross correlation to | |
267 | // identify the SOF, each bit, and EOF. | |
268 | // This function is called 8 times per bit (every 2 subcarrier cycles). | |
269 | // Subcarrier frequency fs is 424kHz, 1/fs = 2,36us, | |
270 | // i.e. function is called every 4,72us | |
271 | // LED handling: | |
272 | // LED C -> ON once we have received the SOF and are expecting the rest. | |
273 | // LED C -> OFF once we have received EOF or are unsynced | |
274 | // | |
275 | // Returns: true if we received a EOF | |
276 | // false if we are still waiting for some more | |
277 | //============================================================================= | |
278 | ||
279 | #define SUBCARRIER_DETECT_THRESHOLD 2 | |
280 | #define SOF_CORRELATOR_LEN (1<<5) | |
281 | ||
282 | typedef struct Demod { | |
283 | enum { | |
284 | DEMOD_UNSYNCD, | |
285 | DEMOD_AWAIT_SOF_1, | |
286 | DEMOD_AWAIT_SOF_2, | |
287 | DEMOD_RECEIVING_DATA, | |
288 | DEMOD_AWAIT_EOF | |
289 | } state; | |
290 | int bitCount; | |
291 | int posCount; | |
292 | enum { | |
293 | LOGIC0, | |
294 | LOGIC1, | |
295 | SOF_PART1, | |
296 | SOF_PART2 | |
297 | } lastBit; | |
298 | uint16_t shiftReg; | |
299 | uint8_t *output; | |
300 | int len; | |
301 | int sum1, sum2; | |
302 | uint8_t SOF_low; | |
303 | uint8_t SOF_high; | |
304 | uint8_t SOF_last; | |
305 | int32_t SOF_corr; | |
306 | int32_t SOF_corr_prev; | |
307 | uint8_t SOF_correlator[SOF_CORRELATOR_LEN]; | |
308 | } Demod_t; | |
309 | ||
310 | static RAMFUNC int Handle15693SamplesDemod(int8_t ci, int8_t cq, Demod_t *Demod) | |
311 | { | |
312 | switch(Demod->state) { | |
313 | case DEMOD_UNSYNCD: | |
314 | // initialize SOF correlator. We are looking for 12 samples low and 12 samples high. | |
315 | Demod->SOF_low = 0; | |
316 | Demod->SOF_high = 12; | |
317 | Demod->SOF_last = 23; | |
318 | memset(Demod->SOF_correlator, 0x00, Demod->SOF_last + 1); | |
319 | Demod->SOF_correlator[Demod->SOF_last] = AMPLITUDE(ci,cq); | |
320 | Demod->SOF_corr = Demod->SOF_correlator[Demod->SOF_last]; | |
321 | Demod->SOF_corr_prev = Demod->SOF_corr; | |
322 | // initialize Demodulator | |
323 | Demod->posCount = 0; | |
324 | Demod->bitCount = 0; | |
325 | Demod->len = 0; | |
326 | Demod->state = DEMOD_AWAIT_SOF_1; | |
327 | break; | |
328 | ||
329 | case DEMOD_AWAIT_SOF_1: | |
330 | // calculate the correlation in real time. Look at differences only. | |
331 | Demod->SOF_corr += Demod->SOF_correlator[Demod->SOF_low++]; | |
332 | Demod->SOF_corr -= 2*Demod->SOF_correlator[Demod->SOF_high++]; | |
333 | Demod->SOF_last++; | |
334 | Demod->SOF_low &= (SOF_CORRELATOR_LEN-1); | |
335 | Demod->SOF_high &= (SOF_CORRELATOR_LEN-1); | |
336 | Demod->SOF_last &= (SOF_CORRELATOR_LEN-1); | |
337 | Demod->SOF_correlator[Demod->SOF_last] = AMPLITUDE(ci,cq); | |
338 | Demod->SOF_corr += Demod->SOF_correlator[Demod->SOF_last]; | |
339 | ||
340 | // if correlation increases for 10 consecutive samples, we are close to maximum correlation | |
341 | if (Demod->SOF_corr > Demod->SOF_corr_prev + SUBCARRIER_DETECT_THRESHOLD) { | |
342 | Demod->posCount++; | |
343 | } else { | |
344 | Demod->posCount = 0; | |
345 | } | |
346 | ||
347 | if (Demod->posCount == 10) { // correlation increased 10 times | |
348 | Demod->state = DEMOD_AWAIT_SOF_2; | |
349 | } | |
350 | ||
351 | Demod->SOF_corr_prev = Demod->SOF_corr; | |
352 | ||
353 | break; | |
354 | ||
355 | case DEMOD_AWAIT_SOF_2: | |
356 | // calculate the correlation in real time. Look at differences only. | |
357 | Demod->SOF_corr += Demod->SOF_correlator[Demod->SOF_low++]; | |
358 | Demod->SOF_corr -= 2*Demod->SOF_correlator[Demod->SOF_high++]; | |
359 | Demod->SOF_last++; | |
360 | Demod->SOF_low &= (SOF_CORRELATOR_LEN-1); | |
361 | Demod->SOF_high &= (SOF_CORRELATOR_LEN-1); | |
362 | Demod->SOF_last &= (SOF_CORRELATOR_LEN-1); | |
363 | Demod->SOF_correlator[Demod->SOF_last] = AMPLITUDE(ci,cq); | |
364 | Demod->SOF_corr += Demod->SOF_correlator[Demod->SOF_last]; | |
365 | ||
366 | if (Demod->SOF_corr >= Demod->SOF_corr_prev) { // we are looking for the maximum correlation | |
367 | Demod->SOF_corr_prev = Demod->SOF_corr; | |
368 | } else { | |
369 | Demod->lastBit = SOF_PART1; // detected 1st part of SOF | |
370 | Demod->sum1 = Demod->SOF_correlator[Demod->SOF_last]; | |
371 | Demod->sum2 = 0; | |
372 | Demod->posCount = 2; | |
373 | Demod->state = DEMOD_RECEIVING_DATA; | |
374 | LED_C_ON(); | |
375 | } | |
376 | ||
377 | break; | |
378 | ||
379 | case DEMOD_RECEIVING_DATA: | |
380 | if (Demod->posCount == 1) { | |
381 | Demod->sum1 = 0; | |
382 | Demod->sum2 = 0; | |
383 | } | |
384 | ||
385 | if (Demod->posCount <= 4) { | |
386 | Demod->sum1 += AMPLITUDE(ci, cq); | |
387 | } else { | |
388 | Demod->sum2 += AMPLITUDE(ci, cq); | |
389 | } | |
390 | ||
391 | if (Demod->posCount == 8) { | |
392 | int16_t corr_1 = (Demod->sum2 - Demod->sum1) / 4; | |
393 | int16_t corr_0 = (Demod->sum1 - Demod->sum2) / 4; | |
394 | int16_t corr_EOF = (Demod->sum1 + Demod->sum2) / 8; | |
395 | if (corr_EOF > corr_0 && corr_EOF > corr_1) { | |
396 | Demod->state = DEMOD_AWAIT_EOF; | |
397 | } else if (corr_1 > corr_0) { | |
398 | // logic 1 | |
399 | if (Demod->lastBit == SOF_PART1) { // still part of SOF | |
400 | Demod->lastBit = SOF_PART2; | |
401 | } else { | |
402 | Demod->lastBit = LOGIC1; | |
403 | Demod->shiftReg >>= 1; | |
404 | Demod->shiftReg |= 0x80; | |
405 | Demod->bitCount++; | |
406 | if (Demod->bitCount == 8) { | |
407 | Demod->output[Demod->len] = Demod->shiftReg; | |
408 | Demod->len++; | |
409 | Demod->bitCount = 0; | |
410 | Demod->shiftReg = 0; | |
411 | } | |
412 | } | |
413 | } else { | |
414 | // logic 0 | |
415 | if (Demod->lastBit == SOF_PART1) { // incomplete SOF | |
416 | Demod->state = DEMOD_UNSYNCD; | |
417 | LED_C_OFF(); | |
418 | } else { | |
419 | Demod->lastBit = LOGIC0; | |
420 | Demod->shiftReg >>= 1; | |
421 | Demod->bitCount++; | |
422 | if (Demod->bitCount == 8) { | |
423 | Demod->output[Demod->len] = Demod->shiftReg; | |
424 | Demod->len++; | |
425 | Demod->bitCount = 0; | |
426 | Demod->shiftReg = 0; | |
427 | } | |
428 | } | |
429 | } | |
430 | Demod->posCount = 0; | |
431 | } | |
432 | Demod->posCount++; | |
433 | break; | |
434 | ||
435 | case DEMOD_AWAIT_EOF: | |
436 | if (Demod->lastBit == LOGIC0) { // this was already part of EOF | |
437 | LED_C_OFF(); | |
438 | return true; | |
439 | } else { | |
440 | Demod->state = DEMOD_UNSYNCD; | |
441 | LED_C_OFF(); | |
442 | } | |
443 | break; | |
444 | ||
445 | default: | |
446 | Demod->state = DEMOD_UNSYNCD; | |
447 | LED_C_OFF(); | |
448 | break; | |
449 | } | |
450 | ||
451 | return false; | |
452 | } | |
453 | ||
454 | ||
455 | static void DemodInit(Demod_t* Demod, uint8_t* data) | |
456 | { | |
457 | Demod->output = data; | |
458 | Demod->state = DEMOD_UNSYNCD; | |
459 | } | |
460 | ||
461 | ||
462 | /* | |
463 | * Demodulate the samples we received from the tag, also log to tracebuffer | |
464 | */ | |
465 | static int GetIso15693AnswerFromTag(uint8_t* response, int timeout) | |
466 | { | |
467 | int maxBehindBy = 0; | |
468 | int lastRxCounter, samples = 0; | |
469 | int8_t ci, cq; | |
470 | bool gotFrame = false; | |
471 | ||
472 | // Allocate memory from BigBuf for some buffers | |
473 | // free all previous allocations first | |
474 | BigBuf_free(); | |
475 | ||
476 | // The DMA buffer, used to stream samples from the FPGA | |
477 | uint16_t* dmaBuf = (uint16_t*) BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE * sizeof(uint16_t)); | |
478 | ||
479 | // the Demodulatur data structure | |
480 | Demod_t* Demod = (Demod_t*) BigBuf_malloc(sizeof(Demod_t)); | |
481 | ||
482 | // Set up the demodulator for tag -> reader responses. | |
483 | DemodInit(Demod, response); | |
484 | ||
485 | // wait for last transfer to complete | |
486 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)); | |
487 | ||
488 | // And put the FPGA in the appropriate mode | |
489 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
490 | ||
491 | // Setup and start DMA. | |
492 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
493 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
494 | ||
495 | uint16_t *upTo = dmaBuf; | |
496 | lastRxCounter = ISO15693_DMA_BUFFER_SIZE; | |
497 | ||
498 | for(;;) { | |
499 | int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (ISO15693_DMA_BUFFER_SIZE-1); | |
500 | if(behindBy > maxBehindBy) { | |
501 | maxBehindBy = behindBy; | |
502 | } | |
503 | ||
504 | if (behindBy < 1) continue; | |
505 | ||
506 | ci = (int8_t)(*upTo >> 8); | |
507 | cq = (int8_t)(*upTo & 0xff); | |
508 | ||
509 | upTo++; | |
510 | lastRxCounter--; | |
511 | if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. | |
512 | upTo = dmaBuf; // start reading the circular buffer from the beginning | |
513 | lastRxCounter += ISO15693_DMA_BUFFER_SIZE; | |
514 | } | |
515 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated. | |
516 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and | |
517 | AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers | |
518 | } | |
519 | samples++; | |
520 | ||
521 | if (Handle15693SamplesDemod(ci, cq, Demod)) { | |
522 | gotFrame = true; | |
523 | break; | |
524 | } | |
525 | ||
526 | if(samples > timeout && Demod->state < DEMOD_RECEIVING_DATA) { | |
527 | Demod->len = 0; | |
528 | break; | |
529 | } | |
530 | } | |
531 | ||
532 | FpgaDisableSscDma(); | |
533 | ||
534 | if (DEBUG) Dbprintf("max behindby = %d, samples = %d, gotFrame = %d, Demod.state = %d, Demod.len = %d, Demod.bitCount = %d, Demod.posCount = %d", | |
535 | maxBehindBy, samples, gotFrame, Demod->state, Demod->len, Demod->bitCount, Demod->posCount); | |
536 | ||
537 | if (tracing && Demod->len > 0) { | |
538 | uint8_t parity[MAX_PARITY_SIZE]; | |
539 | LogTrace(Demod->output, Demod->len, 0, 0, parity, false); | |
540 | } | |
541 | ||
542 | return Demod->len; | |
543 | } | |
544 | ||
545 | ||
546 | // Now the GetISO15693 message from sniffing command | |
547 | // TODO: fix it. This cannot work for several reasons: | |
548 | // 1. Carrier is switched on during sniffing? | |
549 | // 2. We most probable miss the next reader command when demodulating | |
550 | static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) | |
551 | { | |
552 | uint8_t *dest = BigBuf_get_addr(); | |
553 | ||
554 | // NOW READ RESPONSE | |
555 | LED_D_ON(); | |
556 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
557 | //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads | |
558 | for(int c = 0; c < BIGBUF_SIZE; ) { | |
559 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
560 | uint16_t iq = AT91C_BASE_SSC->SSC_RHR; | |
561 | // The samples are correlations against I and Q versions of the | |
562 | // tone that the tag AM-modulates. We just want power, | |
563 | // so abs(I) + abs(Q) is close to what we want. | |
564 | int8_t i = (int8_t)(iq >> 8); | |
565 | int8_t q = (int8_t)(iq & 0xff); | |
566 | uint8_t r = AMPLITUDE(i, q); | |
567 | dest[c++] = r; | |
568 | } | |
569 | } | |
570 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
571 | LED_D_OFF(); | |
572 | ||
573 | ////////////////////////////////////////// | |
574 | /////////// DEMODULATE /////////////////// | |
575 | ////////////////////////////////////////// | |
576 | ||
577 | int i, j; | |
578 | int max = 0, maxPos=0; | |
579 | ||
580 | int skip = 2; | |
581 | ||
582 | // First, correlate for SOF | |
583 | for(i = 0; i < 38000; i++) { | |
584 | int corr = 0; | |
585 | for(j = 0; j < arraylen(FrameSOF); j += skip) { | |
586 | corr += FrameSOF[j]*dest[i+(j/skip)]; | |
587 | } | |
588 | if(corr > max) { | |
589 | max = corr; | |
590 | maxPos = i; | |
591 | } | |
592 | } | |
593 | ||
594 | if (DEBUG) Dbprintf("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip)); | |
595 | ||
596 | int k = 0; // this will be our return value | |
597 | ||
598 | // greg - If correlation is less than 1 then there's little point in continuing | |
599 | if ((max/(arraylen(FrameSOF)/skip)) >= 1) // THIS SHOULD BE 1 | |
600 | { | |
601 | ||
602 | i = maxPos + arraylen(FrameSOF)/skip; | |
603 | ||
604 | uint8_t outBuf[20]; | |
605 | memset(outBuf, 0, sizeof(outBuf)); | |
606 | uint8_t mask = 0x01; | |
607 | for(;;) { | |
608 | int corr0 = 0, corr00 = 0, corr01 = 0, corr1 = 0, corrEOF = 0; | |
609 | for(j = 0; j < arraylen(Logic0); j += skip) { | |
610 | corr0 += Logic0[j]*dest[i+(j/skip)]; | |
611 | } | |
612 | corr01 = corr00 = corr0; | |
613 | for(j = 0; j < arraylen(Logic0); j += skip) { | |
614 | corr00 += Logic0[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; | |
615 | corr01 += Logic1[j]*dest[i+arraylen(Logic0)/skip+(j/skip)]; | |
616 | } | |
617 | for(j = 0; j < arraylen(Logic1); j += skip) { | |
618 | corr1 += Logic1[j]*dest[i+(j/skip)]; | |
619 | } | |
620 | for(j = 0; j < arraylen(FrameEOF); j += skip) { | |
621 | corrEOF += FrameEOF[j]*dest[i+(j/skip)]; | |
622 | } | |
623 | // Even things out by the length of the target waveform. | |
624 | corr00 *= 2; | |
625 | corr01 *= 2; | |
626 | corr0 *= 4; | |
627 | corr1 *= 4; | |
628 | ||
629 | if(corrEOF > corr1 && corrEOF > corr00 && corrEOF > corr01) { | |
630 | if (DEBUG) Dbprintf("EOF at %d, correlation %d (corr01: %d, corr00: %d, corr1: %d, corr0: %d)", | |
631 | i, corrEOF, corr01, corr00, corr1, corr0); | |
632 | break; | |
633 | } else if(corr1 > corr0) { | |
634 | i += arraylen(Logic1)/skip; | |
635 | outBuf[k] |= mask; | |
636 | } else { | |
637 | i += arraylen(Logic0)/skip; | |
638 | } | |
639 | mask <<= 1; | |
640 | if(mask == 0) { | |
641 | k++; | |
642 | mask = 0x01; | |
643 | } | |
644 | if((i+(int)arraylen(FrameEOF)/skip) >= BIGBUF_SIZE) { | |
645 | DbpString("ran off end!"); | |
646 | break; | |
647 | } | |
648 | } | |
649 | if(mask != 0x01) { | |
650 | DbpString("sniff: error, uneven octet! (discard extra bits!)"); | |
651 | /// DbpString(" mask=%02x", mask); | |
652 | } | |
653 | // uint8_t str1 [8]; | |
654 | // itoa(k,str1); | |
655 | // strncat(str1," octets read",8); | |
656 | ||
657 | // DbpString( str1); // DbpString("%d octets", k); | |
658 | ||
659 | // for(i = 0; i < k; i+=3) { | |
660 | // //DbpString("# %2d: %02x ", i, outBuf[i]); | |
661 | // DbpIntegers(outBuf[i],outBuf[i+1],outBuf[i+2]); | |
662 | // } | |
663 | ||
664 | for(i = 0; i < k; i++) { | |
665 | receivedResponse[i] = outBuf[i]; | |
666 | } | |
667 | } // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip)) | |
668 | return k; // return the number of bytes demodulated | |
669 | ||
670 | /// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2)); | |
671 | } | |
672 | ||
673 | ||
674 | static void BuildIdentifyRequest(void); | |
675 | //----------------------------------------------------------------------------- | |
676 | // Start to read an ISO 15693 tag. We send an identify request, then wait | |
677 | // for the response. The response is not demodulated, just left in the buffer | |
678 | // so that it can be downloaded to a PC and processed there. | |
679 | //----------------------------------------------------------------------------- | |
680 | void AcquireRawAdcSamplesIso15693(void) | |
681 | { | |
682 | LEDsoff(); | |
683 | LED_A_ON(); | |
684 | ||
685 | uint8_t *dest = BigBuf_get_addr(); | |
686 | ||
687 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
688 | BuildIdentifyRequest(); | |
689 | ||
690 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
691 | ||
692 | // Give the tags time to energize | |
693 | LED_D_ON(); | |
694 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
695 | SpinDelay(100); | |
696 | ||
697 | // Now send the command | |
698 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_TX); | |
699 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX); | |
700 | ||
701 | LED_B_ON(); | |
702 | for(int c = 0; c < ToSendMax; ) { | |
703 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
704 | AT91C_BASE_SSC->SSC_THR = ~ToSend[c]; | |
705 | c++; | |
706 | } | |
707 | WDT_HIT(); | |
708 | } | |
709 | LED_B_OFF(); | |
710 | ||
711 | // wait for last transfer to complete | |
712 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)); | |
713 | ||
714 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
715 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
716 | ||
717 | for(int c = 0; c < 4000; ) { | |
718 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
719 | uint16_t iq = AT91C_BASE_SSC->SSC_RHR; | |
720 | // The samples are correlations against I and Q versions of the | |
721 | // tone that the tag AM-modulates. We just want power, | |
722 | // so abs(I) + abs(Q) is close to what we want. | |
723 | int8_t i = (int8_t)(iq >> 8); | |
724 | int8_t q = (int8_t)(iq & 0xff); | |
725 | uint8_t r = AMPLITUDE(i, q); | |
726 | dest[c++] = r; | |
727 | } | |
728 | } | |
729 | ||
730 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
731 | LEDsoff(); | |
732 | } | |
733 | ||
734 | ||
735 | // TODO: there is no trigger condition. The 14000 samples represent a time frame of 66ms. | |
736 | // It is unlikely that we get something meaningful. | |
737 | // TODO: Currently we only record tag answers. Add tracing of reader commands. | |
738 | // TODO: would we get something at all? The carrier is switched on... | |
739 | void RecordRawAdcSamplesIso15693(void) | |
740 | { | |
741 | LEDsoff(); | |
742 | LED_A_ON(); | |
743 | ||
744 | uint8_t *dest = BigBuf_get_addr(); | |
745 | ||
746 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
747 | // Setup SSC | |
748 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
749 | ||
750 | // Start from off (no field generated) | |
751 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
752 | SpinDelay(200); | |
753 | ||
754 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
755 | ||
756 | SpinDelay(100); | |
757 | ||
758 | LED_D_ON(); | |
759 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
760 | ||
761 | for(int c = 0; c < 14000;) { | |
762 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
763 | uint16_t iq = AT91C_BASE_SSC->SSC_RHR; | |
764 | // The samples are correlations against I and Q versions of the | |
765 | // tone that the tag AM-modulates. We just want power, | |
766 | // so abs(I) + abs(Q) is close to what we want. | |
767 | int8_t i = (int8_t)(iq >> 8); | |
768 | int8_t q = (int8_t)(iq & 0xff); | |
769 | uint8_t r = AMPLITUDE(i, q); | |
770 | dest[c++] = r; | |
771 | } | |
772 | } | |
773 | ||
774 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
775 | LED_D_OFF(); | |
776 | Dbprintf("finished recording"); | |
777 | LED_A_OFF(); | |
778 | } | |
779 | ||
780 | ||
781 | // Initialize the proxmark as iso15k reader | |
782 | // (this might produces glitches that confuse some tags | |
783 | static void Iso15693InitReader() { | |
784 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
785 | // Setup SSC | |
786 | // FpgaSetupSsc(); | |
787 | ||
788 | // Start from off (no field generated) | |
789 | LED_D_OFF(); | |
790 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
791 | SpinDelay(10); | |
792 | ||
793 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
794 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
795 | ||
796 | // Give the tags time to energize | |
797 | LED_D_ON(); | |
798 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
799 | SpinDelay(250); | |
800 | } | |
801 | ||
802 | /////////////////////////////////////////////////////////////////////// | |
803 | // ISO 15693 Part 3 - Air Interface | |
804 | // This section basically contains transmission and receiving of bits | |
805 | /////////////////////////////////////////////////////////////////////// | |
806 | ||
807 | // Encode (into the ToSend buffers) an identify request, which is the first | |
808 | // thing that you must send to a tag to get a response. | |
809 | static void BuildIdentifyRequest(void) | |
810 | { | |
811 | uint8_t cmd[5]; | |
812 | ||
813 | uint16_t crc; | |
814 | // one sub-carrier, inventory, 1 slot, fast rate | |
815 | // AFI is at bit 5 (1<<4) when doing an INVENTORY | |
816 | cmd[0] = (1 << 2) | (1 << 5) | (1 << 1); | |
817 | // inventory command code | |
818 | cmd[1] = 0x01; | |
819 | // no mask | |
820 | cmd[2] = 0x00; | |
821 | //Now the CRC | |
822 | crc = Crc(cmd, 3); | |
823 | cmd[3] = crc & 0xff; | |
824 | cmd[4] = crc >> 8; | |
825 | ||
826 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
827 | } | |
828 | ||
829 | // uid is in transmission order (which is reverse of display order) | |
830 | static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber ) | |
831 | { | |
832 | uint8_t cmd[13]; | |
833 | ||
834 | uint16_t crc; | |
835 | // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block | |
836 | // followed by teh block data | |
837 | // one sub-carrier, inventory, 1 slot, fast rate | |
838 | cmd[0] = (1 << 6)| (1 << 5) | (1 << 1); // no SELECT bit, ADDR bit, OPTION bit | |
839 | // READ BLOCK command code | |
840 | cmd[1] = 0x20; | |
841 | // UID may be optionally specified here | |
842 | // 64-bit UID | |
843 | cmd[2] = uid[0]; | |
844 | cmd[3] = uid[1]; | |
845 | cmd[4] = uid[2]; | |
846 | cmd[5] = uid[3]; | |
847 | cmd[6] = uid[4]; | |
848 | cmd[7] = uid[5]; | |
849 | cmd[8] = uid[6]; | |
850 | cmd[9] = uid[7]; // 0xe0; // always e0 (not exactly unique) | |
851 | // Block number to read | |
852 | cmd[10] = blockNumber;//0x00; | |
853 | //Now the CRC | |
854 | crc = Crc(cmd, 11); // the crc needs to be calculated over 12 bytes | |
855 | cmd[11] = crc & 0xff; | |
856 | cmd[12] = crc >> 8; | |
857 | ||
858 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
859 | } | |
860 | ||
861 | ||
862 | // Now the VICC>VCD responses when we are simulating a tag | |
863 | static void BuildInventoryResponse( uint8_t *uid) | |
864 | { | |
865 | uint8_t cmd[12]; | |
866 | ||
867 | uint16_t crc; | |
868 | // one sub-carrier, inventory, 1 slot, fast rate | |
869 | // AFI is at bit 5 (1<<4) when doing an INVENTORY | |
870 | //(1 << 2) | (1 << 5) | (1 << 1); | |
871 | cmd[0] = 0; // | |
872 | cmd[1] = 0; // DSFID (data storage format identifier). 0x00 = not supported | |
873 | // 64-bit UID | |
874 | cmd[2] = uid[7]; //0x32; | |
875 | cmd[3] = uid[6]; //0x4b; | |
876 | cmd[4] = uid[5]; //0x03; | |
877 | cmd[5] = uid[4]; //0x01; | |
878 | cmd[6] = uid[3]; //0x00; | |
879 | cmd[7] = uid[2]; //0x10; | |
880 | cmd[8] = uid[1]; //0x05; | |
881 | cmd[9] = uid[0]; //0xe0; | |
882 | //Now the CRC | |
883 | crc = Crc(cmd, 10); | |
884 | cmd[10] = crc & 0xff; | |
885 | cmd[11] = crc >> 8; | |
886 | ||
887 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
888 | } | |
889 | ||
890 | // Universal Method for sending to and recv bytes from a tag | |
891 | // init ... should we initialize the reader? | |
892 | // speed ... 0 low speed, 1 hi speed | |
893 | // **recv will return you a pointer to the received data | |
894 | // If you do not need the answer use NULL for *recv[] | |
895 | // return: lenght of received data | |
896 | int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t **recv) { | |
897 | ||
898 | LED_A_ON(); | |
899 | LED_B_OFF(); | |
900 | LED_C_OFF(); | |
901 | ||
902 | if (init) Iso15693InitReader(); | |
903 | ||
904 | int answerLen=0; | |
905 | uint8_t *answer = BigBuf_get_addr() + 4000; | |
906 | if (recv != NULL) memset(answer, 0, 100); | |
907 | ||
908 | if (!speed) { | |
909 | // low speed (1 out of 256) | |
910 | CodeIso15693AsReader256(send, sendlen); | |
911 | } else { | |
912 | // high speed (1 out of 4) | |
913 | CodeIso15693AsReader(send, sendlen); | |
914 | } | |
915 | ||
916 | TransmitTo15693Tag(ToSend,ToSendMax); | |
917 | // Now wait for a response | |
918 | if (recv!=NULL) { | |
919 | answerLen = GetIso15693AnswerFromTag(answer, 100); | |
920 | *recv=answer; | |
921 | } | |
922 | ||
923 | LED_A_OFF(); | |
924 | ||
925 | return answerLen; | |
926 | } | |
927 | ||
928 | ||
929 | // -------------------------------------------------------------------- | |
930 | // Debug Functions | |
931 | // -------------------------------------------------------------------- | |
932 | ||
933 | // Decodes a message from a tag and displays its metadata and content | |
934 | #define DBD15STATLEN 48 | |
935 | void DbdecodeIso15693Answer(int len, uint8_t *d) { | |
936 | char status[DBD15STATLEN+1]={0}; | |
937 | uint16_t crc; | |
938 | ||
939 | if (len>3) { | |
940 | if (d[0]&(1<<3)) | |
941 | strncat(status,"ProtExt ",DBD15STATLEN); | |
942 | if (d[0]&1) { | |
943 | // error | |
944 | strncat(status,"Error ",DBD15STATLEN); | |
945 | switch (d[1]) { | |
946 | case 0x01: | |
947 | strncat(status,"01:notSupp",DBD15STATLEN); | |
948 | break; | |
949 | case 0x02: | |
950 | strncat(status,"02:notRecog",DBD15STATLEN); | |
951 | break; | |
952 | case 0x03: | |
953 | strncat(status,"03:optNotSupp",DBD15STATLEN); | |
954 | break; | |
955 | case 0x0f: | |
956 | strncat(status,"0f:noInfo",DBD15STATLEN); | |
957 | break; | |
958 | case 0x10: | |
959 | strncat(status,"10:dontExist",DBD15STATLEN); | |
960 | break; | |
961 | case 0x11: | |
962 | strncat(status,"11:lockAgain",DBD15STATLEN); | |
963 | break; | |
964 | case 0x12: | |
965 | strncat(status,"12:locked",DBD15STATLEN); | |
966 | break; | |
967 | case 0x13: | |
968 | strncat(status,"13:progErr",DBD15STATLEN); | |
969 | break; | |
970 | case 0x14: | |
971 | strncat(status,"14:lockErr",DBD15STATLEN); | |
972 | break; | |
973 | default: | |
974 | strncat(status,"unknownErr",DBD15STATLEN); | |
975 | } | |
976 | strncat(status," ",DBD15STATLEN); | |
977 | } else { | |
978 | strncat(status,"NoErr ",DBD15STATLEN); | |
979 | } | |
980 | ||
981 | crc=Crc(d,len-2); | |
982 | if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) ) | |
983 | strncat(status,"CrcOK",DBD15STATLEN); | |
984 | else | |
985 | strncat(status,"CrcFail!",DBD15STATLEN); | |
986 | ||
987 | Dbprintf("%s",status); | |
988 | } | |
989 | } | |
990 | ||
991 | ||
992 | ||
993 | /////////////////////////////////////////////////////////////////////// | |
994 | // Functions called via USB/Client | |
995 | /////////////////////////////////////////////////////////////////////// | |
996 | ||
997 | void SetDebugIso15693(uint32_t debug) { | |
998 | DEBUG=debug; | |
999 | Dbprintf("Iso15693 Debug is now %s",DEBUG?"on":"off"); | |
1000 | return; | |
1001 | } | |
1002 | ||
1003 | //----------------------------------------------------------------------------- | |
1004 | // Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector | |
1005 | // all demodulation performed in arm rather than host. - greg | |
1006 | //----------------------------------------------------------------------------- | |
1007 | void ReaderIso15693(uint32_t parameter) | |
1008 | { | |
1009 | LEDsoff(); | |
1010 | LED_A_ON(); | |
1011 | ||
1012 | int answerLen1 = 0; | |
1013 | uint8_t TagUID[8] = {0x00}; | |
1014 | ||
1015 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
1016 | ||
1017 | uint8_t *answer1 = BigBuf_get_addr() + 4000; | |
1018 | memset(answer1, 0x00, 200); | |
1019 | ||
1020 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1021 | // Setup SSC | |
1022 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
1023 | ||
1024 | // Start from off (no field generated) | |
1025 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1026 | SpinDelay(200); | |
1027 | ||
1028 | // Give the tags time to energize | |
1029 | LED_D_ON(); | |
1030 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
1031 | SpinDelay(200); | |
1032 | ||
1033 | // FIRST WE RUN AN INVENTORY TO GET THE TAG UID | |
1034 | // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME | |
1035 | ||
1036 | // Now send the IDENTIFY command | |
1037 | BuildIdentifyRequest(); | |
1038 | ||
1039 | TransmitTo15693Tag(ToSend,ToSendMax); | |
1040 | ||
1041 | // Now wait for a response | |
1042 | answerLen1 = GetIso15693AnswerFromTag(answer1, 100) ; | |
1043 | ||
1044 | if (answerLen1 >=12) // we should do a better check than this | |
1045 | { | |
1046 | TagUID[0] = answer1[2]; | |
1047 | TagUID[1] = answer1[3]; | |
1048 | TagUID[2] = answer1[4]; | |
1049 | TagUID[3] = answer1[5]; | |
1050 | TagUID[4] = answer1[6]; | |
1051 | TagUID[5] = answer1[7]; | |
1052 | TagUID[6] = answer1[8]; // IC Manufacturer code | |
1053 | TagUID[7] = answer1[9]; // always E0 | |
1054 | ||
1055 | } | |
1056 | ||
1057 | Dbprintf("%d octets read from IDENTIFY request:", answerLen1); | |
1058 | DbdecodeIso15693Answer(answerLen1,answer1); | |
1059 | Dbhexdump(answerLen1,answer1,true); | |
1060 | ||
1061 | // UID is reverse | |
1062 | if (answerLen1 >= 12) | |
1063 | Dbprintf("UID = %02hX%02hX%02hX%02hX%02hX%02hX%02hX%02hX", | |
1064 | TagUID[7],TagUID[6],TagUID[5],TagUID[4], | |
1065 | TagUID[3],TagUID[2],TagUID[1],TagUID[0]); | |
1066 | ||
1067 | ||
1068 | // Dbprintf("%d octets read from SELECT request:", answerLen2); | |
1069 | // DbdecodeIso15693Answer(answerLen2,answer2); | |
1070 | // Dbhexdump(answerLen2,answer2,true); | |
1071 | ||
1072 | // Dbprintf("%d octets read from XXX request:", answerLen3); | |
1073 | // DbdecodeIso15693Answer(answerLen3,answer3); | |
1074 | // Dbhexdump(answerLen3,answer3,true); | |
1075 | ||
1076 | // read all pages | |
1077 | if (answerLen1 >= 12 && DEBUG) { | |
1078 | uint8_t *answer2 = BigBuf_get_addr() + 4100; | |
1079 | int i=0; | |
1080 | while (i<32) { // sanity check, assume max 32 pages | |
1081 | BuildReadBlockRequest(TagUID,i); | |
1082 | TransmitTo15693Tag(ToSend,ToSendMax); | |
1083 | int answerLen2 = GetIso15693AnswerFromTag(answer2, 100); | |
1084 | if (answerLen2>0) { | |
1085 | Dbprintf("READ SINGLE BLOCK %d returned %d octets:",i,answerLen2); | |
1086 | DbdecodeIso15693Answer(answerLen2,answer2); | |
1087 | Dbhexdump(answerLen2,answer2,true); | |
1088 | if ( *((uint32_t*) answer2) == 0x07160101 ) break; // exit on NoPageErr | |
1089 | } | |
1090 | i++; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | // for the time being, switch field off to protect rdv4.0 | |
1095 | // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway | |
1096 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1097 | LED_D_OFF(); | |
1098 | ||
1099 | LED_A_OFF(); | |
1100 | } | |
1101 | ||
1102 | // Simulate an ISO15693 TAG, perform anti-collision and then print any reader commands | |
1103 | // all demodulation performed in arm rather than host. - greg | |
1104 | void SimTagIso15693(uint32_t parameter, uint8_t *uid) | |
1105 | { | |
1106 | LEDsoff(); | |
1107 | LED_A_ON(); | |
1108 | ||
1109 | int answerLen1 = 0; | |
1110 | int samples = 0; | |
1111 | int elapsed = 0; | |
1112 | ||
1113 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
1114 | ||
1115 | uint8_t *buf = BigBuf_get_addr() + 4000; | |
1116 | memset(buf, 0x00, 100); | |
1117 | ||
1118 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1119 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); | |
1120 | ||
1121 | // Start from off (no field generated) | |
1122 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1123 | SpinDelay(200); | |
1124 | ||
1125 | // Listen to reader | |
1126 | answerLen1 = GetIso15693AnswerFromSniff(buf, 100, &samples, &elapsed) ; | |
1127 | ||
1128 | if (answerLen1 >=1) // we should do a better check than this | |
1129 | { | |
1130 | // Build a suitable reponse to the reader INVENTORY cocmmand | |
1131 | // not so obsvious, but in the call to BuildInventoryResponse, the command is copied to the global ToSend buffer used below. | |
1132 | ||
1133 | BuildInventoryResponse(uid); | |
1134 | ||
1135 | TransmitTo15693Reader(ToSend,ToSendMax); | |
1136 | } | |
1137 | ||
1138 | Dbprintf("%d octets read from reader command: %x %x %x %x %x %x %x %x %x", answerLen1, | |
1139 | buf[0], buf[1], buf[2], buf[3], | |
1140 | buf[4], buf[5], buf[6], buf[7], buf[8]); | |
1141 | ||
1142 | Dbprintf("Simulationg uid: %x %x %x %x %x %x %x %x", | |
1143 | uid[0], uid[1], uid[2], uid[3], | |
1144 | uid[4], uid[5], uid[6], uid[7]); | |
1145 | ||
1146 | LEDsoff(); | |
1147 | } | |
1148 | ||
1149 | ||
1150 | // Since there is no standardized way of reading the AFI out of a tag, we will brute force it | |
1151 | // (some manufactures offer a way to read the AFI, though) | |
1152 | void BruteforceIso15693Afi(uint32_t speed) | |
1153 | { | |
1154 | LEDsoff(); | |
1155 | LED_A_ON(); | |
1156 | ||
1157 | uint8_t data[20]; | |
1158 | uint8_t *recv=data; | |
1159 | int datalen=0, recvlen=0; | |
1160 | ||
1161 | Iso15693InitReader(); | |
1162 | ||
1163 | // first without AFI | |
1164 | // Tags should respond wihtout AFI and with AFI=0 even when AFI is active | |
1165 | ||
1166 | data[0]=ISO15_REQ_SUBCARRIER_SINGLE | ISO15_REQ_DATARATE_HIGH | | |
1167 | ISO15_REQ_INVENTORY | ISO15_REQINV_SLOT1; | |
1168 | data[1]=ISO15_CMD_INVENTORY; | |
1169 | data[2]=0; // mask length | |
1170 | datalen=AddCrc(data,3); | |
1171 | recvlen=SendDataTag(data, datalen, false, speed, &recv); | |
1172 | WDT_HIT(); | |
1173 | if (recvlen>=12) { | |
1174 | Dbprintf("NoAFI UID=%s",sprintUID(NULL,&recv[2])); | |
1175 | } | |
1176 | ||
1177 | // now with AFI | |
1178 | ||
1179 | data[0]=ISO15_REQ_SUBCARRIER_SINGLE | ISO15_REQ_DATARATE_HIGH | | |
1180 | ISO15_REQ_INVENTORY | ISO15_REQINV_AFI | ISO15_REQINV_SLOT1; | |
1181 | data[1]=ISO15_CMD_INVENTORY; | |
1182 | data[2]=0; // AFI | |
1183 | data[3]=0; // mask length | |
1184 | ||
1185 | for (int i=0;i<256;i++) { | |
1186 | data[2]=i & 0xFF; | |
1187 | datalen=AddCrc(data,4); | |
1188 | recvlen=SendDataTag(data, datalen, false, speed, &recv); | |
1189 | WDT_HIT(); | |
1190 | if (recvlen>=12) { | |
1191 | Dbprintf("AFI=%i UID=%s",i,sprintUID(NULL,&recv[2])); | |
1192 | } | |
1193 | } | |
1194 | Dbprintf("AFI Bruteforcing done."); | |
1195 | ||
1196 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1197 | LEDsoff(); | |
1198 | } | |
1199 | ||
1200 | // Allows to directly send commands to the tag via the client | |
1201 | void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]) { | |
1202 | ||
1203 | int recvlen=0; | |
1204 | uint8_t *recvbuf = BigBuf_get_addr(); | |
1205 | ||
1206 | LED_A_ON(); | |
1207 | ||
1208 | if (DEBUG) { | |
1209 | Dbprintf("SEND"); | |
1210 | Dbhexdump(datalen,data,true); | |
1211 | } | |
1212 | ||
1213 | recvlen = SendDataTag(data, datalen, true, speed, (recv?&recvbuf:NULL)); | |
1214 | ||
1215 | if (recv) { | |
1216 | cmd_send(CMD_ACK, recvlen>48?48:recvlen, 0, 0, recvbuf, 48); | |
1217 | ||
1218 | if (DEBUG) { | |
1219 | Dbprintf("RECV"); | |
1220 | DbdecodeIso15693Answer(recvlen,recvbuf); | |
1221 | Dbhexdump(recvlen,recvbuf,true); | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | // for the time being, switch field off to protect rdv4.0 | |
1226 | // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway | |
1227 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1228 | LED_D_OFF(); | |
1229 | ||
1230 | LED_A_OFF(); | |
1231 | } | |
1232 | ||
1233 | ||
1234 | ||
1235 | ||
1236 | // -------------------------------------------------------------------- | |
1237 | // -- Misc & deprecated functions | |
1238 | // -------------------------------------------------------------------- | |
1239 | ||
1240 | /* | |
1241 | ||
1242 | // do not use; has a fix UID | |
1243 | static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid) | |
1244 | { | |
1245 | uint8_t cmd[12]; | |
1246 | ||
1247 | uint16_t crc; | |
1248 | // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block | |
1249 | // followed by teh block data | |
1250 | // one sub-carrier, inventory, 1 slot, fast rate | |
1251 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1252 | // System Information command code | |
1253 | cmd[1] = 0x2B; | |
1254 | // UID may be optionally specified here | |
1255 | // 64-bit UID | |
1256 | cmd[2] = 0x32; | |
1257 | cmd[3]= 0x4b; | |
1258 | cmd[4] = 0x03; | |
1259 | cmd[5] = 0x01; | |
1260 | cmd[6] = 0x00; | |
1261 | cmd[7] = 0x10; | |
1262 | cmd[8] = 0x05; | |
1263 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1264 | //Now the CRC | |
1265 | crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes | |
1266 | cmd[10] = crc & 0xff; | |
1267 | cmd[11] = crc >> 8; | |
1268 | ||
1269 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1270 | } | |
1271 | ||
1272 | ||
1273 | // do not use; has a fix UID | |
1274 | static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid) | |
1275 | { | |
1276 | uint8_t cmd[14]; | |
1277 | ||
1278 | uint16_t crc; | |
1279 | // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block | |
1280 | // followed by teh block data | |
1281 | // one sub-carrier, inventory, 1 slot, fast rate | |
1282 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1283 | // READ Multi BLOCK command code | |
1284 | cmd[1] = 0x23; | |
1285 | // UID may be optionally specified here | |
1286 | // 64-bit UID | |
1287 | cmd[2] = 0x32; | |
1288 | cmd[3]= 0x4b; | |
1289 | cmd[4] = 0x03; | |
1290 | cmd[5] = 0x01; | |
1291 | cmd[6] = 0x00; | |
1292 | cmd[7] = 0x10; | |
1293 | cmd[8] = 0x05; | |
1294 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1295 | // First Block number to read | |
1296 | cmd[10] = 0x00; | |
1297 | // Number of Blocks to read | |
1298 | cmd[11] = 0x2f; // read quite a few | |
1299 | //Now the CRC | |
1300 | crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes | |
1301 | cmd[12] = crc & 0xff; | |
1302 | cmd[13] = crc >> 8; | |
1303 | ||
1304 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1305 | } | |
1306 | ||
1307 | // do not use; has a fix UID | |
1308 | static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t CmdCode) | |
1309 | { | |
1310 | uint8_t cmd[14]; | |
1311 | ||
1312 | uint16_t crc; | |
1313 | // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block | |
1314 | // followed by teh block data | |
1315 | // one sub-carrier, inventory, 1 slot, fast rate | |
1316 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1317 | // READ BLOCK command code | |
1318 | cmd[1] = CmdCode; | |
1319 | // UID may be optionally specified here | |
1320 | // 64-bit UID | |
1321 | cmd[2] = 0x32; | |
1322 | cmd[3]= 0x4b; | |
1323 | cmd[4] = 0x03; | |
1324 | cmd[5] = 0x01; | |
1325 | cmd[6] = 0x00; | |
1326 | cmd[7] = 0x10; | |
1327 | cmd[8] = 0x05; | |
1328 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1329 | // Parameter | |
1330 | cmd[10] = 0x00; | |
1331 | cmd[11] = 0x0a; | |
1332 | ||
1333 | // cmd[12] = 0x00; | |
1334 | // cmd[13] = 0x00; //Now the CRC | |
1335 | crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes | |
1336 | cmd[12] = crc & 0xff; | |
1337 | cmd[13] = crc >> 8; | |
1338 | ||
1339 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1340 | } | |
1341 | ||
1342 | // do not use; has a fix UID | |
1343 | static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], uint8_t CmdCode) | |
1344 | { | |
1345 | uint8_t cmd[14]; | |
1346 | ||
1347 | uint16_t crc; | |
1348 | // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block | |
1349 | // followed by teh block data | |
1350 | // one sub-carrier, inventory, 1 slot, fast rate | |
1351 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1352 | // READ BLOCK command code | |
1353 | cmd[1] = CmdCode; | |
1354 | // UID may be optionally specified here | |
1355 | // 64-bit UID | |
1356 | cmd[2] = 0x32; | |
1357 | cmd[3]= 0x4b; | |
1358 | cmd[4] = 0x03; | |
1359 | cmd[5] = 0x01; | |
1360 | cmd[6] = 0x00; | |
1361 | cmd[7] = 0x10; | |
1362 | cmd[8] = 0x05; | |
1363 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1364 | // Parameter | |
1365 | cmd[10] = 0x05; // for custom codes this must be manufcturer code | |
1366 | cmd[11] = 0x00; | |
1367 | ||
1368 | // cmd[12] = 0x00; | |
1369 | // cmd[13] = 0x00; //Now the CRC | |
1370 | crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes | |
1371 | cmd[12] = crc & 0xff; | |
1372 | cmd[13] = crc >> 8; | |
1373 | ||
1374 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1375 | } | |
1376 | ||
1377 | ||
1378 | ||
1379 | ||
1380 | */ | |
1381 | ||
1382 |