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cee5a30d | 1 | //----------------------------------------------------------------------------- |
2 | // Gerhard de Koning Gans - May 2008 | |
3 | // Hagen Fritsch - June 2010 | |
4 | // Gerhard de Koning Gans - May 2011 | |
1e262141 | 5 | // Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation |
cee5a30d | 6 | // |
7 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, | |
8 | // at your option, any later version. See the LICENSE.txt file for the text of | |
9 | // the license. | |
10 | //----------------------------------------------------------------------------- | |
11 | // Routines to support iClass. | |
12 | //----------------------------------------------------------------------------- | |
13 | // Based on ISO14443a implementation. Still in experimental phase. | |
14 | // Contribution made during a security research at Radboud University Nijmegen | |
17505ce2 | 15 | // |
cee5a30d | 16 | // Please feel free to contribute and extend iClass support!! |
17 | //----------------------------------------------------------------------------- | |
18 | // | |
cee5a30d | 19 | // FIX: |
20 | // ==== | |
21 | // We still have sometimes a demodulation error when snooping iClass communication. | |
22 | // The resulting trace of a read-block-03 command may look something like this: | |
23 | // | |
17505ce2 | 24 | // + 22279: : 0c 03 e8 01 |
cee5a30d | 25 | // |
26 | // ...with an incorrect answer... | |
27 | // | |
28 | // + 85: 0: TAG ff! ff! ff! ff! ff! ff! ff! ff! bb 33 bb 00 01! 0e! 04! bb !crc | |
29 | // | |
30 | // We still left the error signalling bytes in the traces like 0xbb | |
31 | // | |
32 | // A correct trace should look like this: | |
33 | // | |
17505ce2 | 34 | // + 21112: : 0c 03 e8 01 |
35 | // + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5 | |
cee5a30d | 36 | // |
37 | //----------------------------------------------------------------------------- | |
38 | ||
17505ce2 | 39 | #include "iclass.h" |
40 | ||
cee5a30d | 41 | #include "proxmark3.h" |
42 | #include "apps.h" | |
43 | #include "util.h" | |
44 | #include "string.h" | |
3d2c9c9b | 45 | #include "printf.h" |
7e67e42f | 46 | #include "common.h" |
fecd8202 | 47 | #include "cmd.h" |
6e49717b | 48 | #include "iso14443a.h" |
3d2c9c9b | 49 | #include "iso15693.h" |
1e262141 | 50 | // Needed for CRC in emulation mode; |
51 | // same construction as in ISO 14443; | |
52 | // different initial value (CRC_ICLASS) | |
53 | #include "iso14443crc.h" | |
c3963755 | 54 | #include "iso15693tools.h" |
b67f7ec3 | 55 | #include "protocols.h" |
10a8875c | 56 | #include "optimized_cipher.h" |
979c7655 | 57 | #include "usb_cdc.h" // for usb_poll_validate_length |
fc52fbd4 | 58 | #include "fpgaloader.h" |
10a8875c | 59 | |
1e262141 | 60 | static int timeout = 4096; |
cee5a30d | 61 | |
cee5a30d | 62 | //----------------------------------------------------------------------------- |
63 | // The software UART that receives commands from the reader, and its state | |
64 | // variables. | |
65 | //----------------------------------------------------------------------------- | |
66 | static struct { | |
17505ce2 | 67 | enum { |
68 | STATE_UNSYNCD, | |
69 | STATE_START_OF_COMMUNICATION, | |
70 | STATE_RECEIVING | |
71 | } state; | |
72 | uint16_t shiftReg; | |
73 | int bitCnt; | |
74 | int byteCnt; | |
75 | int byteCntMax; | |
76 | int posCnt; | |
77 | int nOutOfCnt; | |
78 | int OutOfCnt; | |
79 | int syncBit; | |
80 | int samples; | |
81 | int highCnt; | |
82 | int swapper; | |
83 | int counter; | |
84 | int bitBuffer; | |
85 | int dropPosition; | |
86 | uint8_t *output; | |
cee5a30d | 87 | } Uart; |
88 | ||
17505ce2 | 89 | static RAMFUNC int OutOfNDecoding(int bit) { |
9f693930 | 90 | //int error = 0; |
cee5a30d | 91 | int bitright; |
92 | ||
17505ce2 | 93 | if (!Uart.bitBuffer) { |
cee5a30d | 94 | Uart.bitBuffer = bit ^ 0xFF0; |
44964fd1 | 95 | return false; |
17505ce2 | 96 | } else { |
cee5a30d | 97 | Uart.bitBuffer <<= 4; |
98 | Uart.bitBuffer ^= bit; | |
99 | } | |
17505ce2 | 100 | |
101 | /*if (Uart.swapper) { | |
cee5a30d | 102 | Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; |
103 | Uart.byteCnt++; | |
104 | Uart.swapper = 0; | |
17505ce2 | 105 | if (Uart.byteCnt > 15) { return true; } |
cee5a30d | 106 | } |
107 | else { | |
108 | Uart.swapper = 1; | |
109 | }*/ | |
110 | ||
17505ce2 | 111 | if (Uart.state != STATE_UNSYNCD) { |
cee5a30d | 112 | Uart.posCnt++; |
113 | ||
17505ce2 | 114 | if ((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) { |
cee5a30d | 115 | bit = 0x00; |
17505ce2 | 116 | } else { |
cee5a30d | 117 | bit = 0x01; |
118 | } | |
17505ce2 | 119 | if (((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) { |
cee5a30d | 120 | bitright = 0x00; |
17505ce2 | 121 | } else { |
cee5a30d | 122 | bitright = 0x01; |
123 | } | |
17505ce2 | 124 | if (bit != bitright) { |
125 | bit = bitright; | |
126 | } | |
127 | ||
cee5a30d | 128 | |
cee5a30d | 129 | // So, now we only have to deal with *bit*, lets see... |
17505ce2 | 130 | if (Uart.posCnt == 1) { |
cee5a30d | 131 | // measurement first half bitperiod |
17505ce2 | 132 | if (!bit) { |
cee5a30d | 133 | // Drop in first half means that we are either seeing |
134 | // an SOF or an EOF. | |
135 | ||
17505ce2 | 136 | if (Uart.nOutOfCnt == 1) { |
cee5a30d | 137 | // End of Communication |
138 | Uart.state = STATE_UNSYNCD; | |
139 | Uart.highCnt = 0; | |
17505ce2 | 140 | if (Uart.byteCnt == 0) { |
cee5a30d | 141 | // Its not straightforward to show single EOFs |
44964fd1 | 142 | // So just leave it and do not return true |
6a1f2d82 | 143 | Uart.output[0] = 0xf0; |
cee5a30d | 144 | Uart.byteCnt++; |
17505ce2 | 145 | } else { |
44964fd1 | 146 | return true; |
cee5a30d | 147 | } |
17505ce2 | 148 | } else if (Uart.state != STATE_START_OF_COMMUNICATION) { |
cee5a30d | 149 | // When not part of SOF or EOF, it is an error |
150 | Uart.state = STATE_UNSYNCD; | |
151 | Uart.highCnt = 0; | |
9f693930 | 152 | //error = 4; |
cee5a30d | 153 | } |
154 | } | |
17505ce2 | 155 | } else { |
cee5a30d | 156 | // measurement second half bitperiod |
157 | // Count the bitslot we are in... (ISO 15693) | |
158 | Uart.nOutOfCnt++; | |
17505ce2 | 159 | |
160 | if (!bit) { | |
161 | if (Uart.dropPosition) { | |
162 | if (Uart.state == STATE_START_OF_COMMUNICATION) { | |
9f693930 | 163 | //error = 1; |
17505ce2 | 164 | } else { |
9f693930 | 165 | //error = 7; |
cee5a30d | 166 | } |
167 | // It is an error if we already have seen a drop in current frame | |
168 | Uart.state = STATE_UNSYNCD; | |
169 | Uart.highCnt = 0; | |
17505ce2 | 170 | } else { |
cee5a30d | 171 | Uart.dropPosition = Uart.nOutOfCnt; |
172 | } | |
173 | } | |
174 | ||
175 | Uart.posCnt = 0; | |
176 | ||
17505ce2 | 177 | |
178 | if (Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) { | |
cee5a30d | 179 | Uart.nOutOfCnt = 0; |
17505ce2 | 180 | |
181 | if (Uart.state == STATE_START_OF_COMMUNICATION) { | |
182 | if (Uart.dropPosition == 4) { | |
cee5a30d | 183 | Uart.state = STATE_RECEIVING; |
184 | Uart.OutOfCnt = 256; | |
17505ce2 | 185 | } else if (Uart.dropPosition == 3) { |
cee5a30d | 186 | Uart.state = STATE_RECEIVING; |
187 | Uart.OutOfCnt = 4; | |
188 | //Uart.output[Uart.byteCnt] = 0xdd; | |
189 | //Uart.byteCnt++; | |
17505ce2 | 190 | } else { |
cee5a30d | 191 | Uart.state = STATE_UNSYNCD; |
192 | Uart.highCnt = 0; | |
193 | } | |
194 | Uart.dropPosition = 0; | |
17505ce2 | 195 | } else { |
cee5a30d | 196 | // RECEIVING DATA |
197 | // 1 out of 4 | |
17505ce2 | 198 | if (!Uart.dropPosition) { |
cee5a30d | 199 | Uart.state = STATE_UNSYNCD; |
200 | Uart.highCnt = 0; | |
9f693930 | 201 | //error = 9; |
17505ce2 | 202 | } else { |
cee5a30d | 203 | Uart.shiftReg >>= 2; |
17505ce2 | 204 | |
cee5a30d | 205 | // Swap bit order |
206 | Uart.dropPosition--; | |
17505ce2 | 207 | //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; } |
208 | //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; } | |
209 | ||
cee5a30d | 210 | Uart.shiftReg ^= ((Uart.dropPosition & 0x03) << 6); |
211 | Uart.bitCnt += 2; | |
212 | Uart.dropPosition = 0; | |
213 | ||
17505ce2 | 214 | if (Uart.bitCnt == 8) { |
cee5a30d | 215 | Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff); |
216 | Uart.byteCnt++; | |
cee5a30d | 217 | Uart.bitCnt = 0; |
218 | Uart.shiftReg = 0; | |
219 | } | |
220 | } | |
221 | } | |
17505ce2 | 222 | } else if (Uart.nOutOfCnt == Uart.OutOfCnt) { |
cee5a30d | 223 | // RECEIVING DATA |
224 | // 1 out of 256 | |
17505ce2 | 225 | if (!Uart.dropPosition) { |
cee5a30d | 226 | Uart.state = STATE_UNSYNCD; |
227 | Uart.highCnt = 0; | |
9f693930 | 228 | //error = 3; |
17505ce2 | 229 | } else { |
cee5a30d | 230 | Uart.dropPosition--; |
231 | Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff); | |
232 | Uart.byteCnt++; | |
cee5a30d | 233 | Uart.bitCnt = 0; |
234 | Uart.shiftReg = 0; | |
235 | Uart.nOutOfCnt = 0; | |
236 | Uart.dropPosition = 0; | |
237 | } | |
238 | } | |
239 | ||
17505ce2 | 240 | /*if (error) { |
cee5a30d | 241 | Uart.output[Uart.byteCnt] = 0xAA; |
242 | Uart.byteCnt++; | |
243 | Uart.output[Uart.byteCnt] = error & 0xFF; | |
244 | Uart.byteCnt++; | |
245 | Uart.output[Uart.byteCnt] = 0xAA; | |
246 | Uart.byteCnt++; | |
247 | Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF; | |
248 | Uart.byteCnt++; | |
249 | Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF; | |
250 | Uart.byteCnt++; | |
251 | Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF; | |
252 | Uart.byteCnt++; | |
253 | Uart.output[Uart.byteCnt] = 0xAA; | |
254 | Uart.byteCnt++; | |
44964fd1 | 255 | return true; |
cee5a30d | 256 | }*/ |
257 | } | |
258 | ||
17505ce2 | 259 | } else { |
cee5a30d | 260 | bit = Uart.bitBuffer & 0xf0; |
261 | bit >>= 4; | |
262 | bit ^= 0x0F; // drops become 1s ;-) | |
17505ce2 | 263 | if (bit) { |
cee5a30d | 264 | // should have been high or at least (4 * 128) / fc |
265 | // according to ISO this should be at least (9 * 128 + 20) / fc | |
17505ce2 | 266 | if (Uart.highCnt == 8) { |
cee5a30d | 267 | // we went low, so this could be start of communication |
268 | // it turns out to be safer to choose a less significant | |
269 | // syncbit... so we check whether the neighbour also represents the drop | |
270 | Uart.posCnt = 1; // apparently we are busy with our first half bit period | |
271 | Uart.syncBit = bit & 8; | |
272 | Uart.samples = 3; | |
17505ce2 | 273 | if (!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; } |
274 | else if (bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; } | |
275 | if (!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; } | |
276 | else if (bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; } | |
277 | if (!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0; | |
278 | if (Uart.syncBit && (Uart.bitBuffer & 8)) { | |
cee5a30d | 279 | Uart.syncBit = 8; |
280 | ||
281 | // the first half bit period is expected in next sample | |
282 | Uart.posCnt = 0; | |
283 | Uart.samples = 3; | |
284 | } | |
17505ce2 | 285 | } else if (bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; } |
cee5a30d | 286 | |
287 | Uart.syncBit <<= 4; | |
288 | Uart.state = STATE_START_OF_COMMUNICATION; | |
289 | Uart.bitCnt = 0; | |
290 | Uart.byteCnt = 0; | |
cee5a30d | 291 | Uart.nOutOfCnt = 0; |
292 | Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256 | |
293 | Uart.dropPosition = 0; | |
294 | Uart.shiftReg = 0; | |
9f693930 | 295 | //error = 0; |
17505ce2 | 296 | } else { |
cee5a30d | 297 | Uart.highCnt = 0; |
298 | } | |
17505ce2 | 299 | } else if (Uart.highCnt < 8) { |
300 | Uart.highCnt++; | |
cee5a30d | 301 | } |
302 | } | |
303 | ||
17505ce2 | 304 | return false; |
cee5a30d | 305 | } |
306 | ||
17505ce2 | 307 | |
cee5a30d | 308 | //============================================================================= |
1e262141 | 309 | // Manchester |
cee5a30d | 310 | //============================================================================= |
311 | ||
312 | static struct { | |
17505ce2 | 313 | enum { |
314 | DEMOD_UNSYNCD, | |
cee5a30d | 315 | DEMOD_START_OF_COMMUNICATION, |
316 | DEMOD_START_OF_COMMUNICATION2, | |
317 | DEMOD_START_OF_COMMUNICATION3, | |
318 | DEMOD_SOF_COMPLETE, | |
319 | DEMOD_MANCHESTER_D, | |
320 | DEMOD_MANCHESTER_E, | |
321 | DEMOD_END_OF_COMMUNICATION, | |
322 | DEMOD_END_OF_COMMUNICATION2, | |
323 | DEMOD_MANCHESTER_F, | |
17505ce2 | 324 | DEMOD_ERROR_WAIT |
325 | } state; | |
326 | int bitCount; | |
327 | int posCount; | |
328 | int syncBit; | |
329 | uint16_t shiftReg; | |
330 | int buffer; | |
331 | int buffer2; | |
332 | int buffer3; | |
333 | int buff; | |
334 | int samples; | |
335 | int len; | |
cee5a30d | 336 | enum { |
337 | SUB_NONE, | |
338 | SUB_FIRST_HALF, | |
339 | SUB_SECOND_HALF, | |
340 | SUB_BOTH | |
17505ce2 | 341 | } sub; |
342 | uint8_t *output; | |
cee5a30d | 343 | } Demod; |
344 | ||
17505ce2 | 345 | static RAMFUNC int ManchesterDecoding(int v) { |
cee5a30d | 346 | int bit; |
347 | int modulation; | |
348 | int error = 0; | |
349 | ||
350 | bit = Demod.buffer; | |
351 | Demod.buffer = Demod.buffer2; | |
352 | Demod.buffer2 = Demod.buffer3; | |
353 | Demod.buffer3 = v; | |
354 | ||
17505ce2 | 355 | if (Demod.buff < 3) { |
cee5a30d | 356 | Demod.buff++; |
44964fd1 | 357 | return false; |
cee5a30d | 358 | } |
359 | ||
17505ce2 | 360 | if (Demod.state==DEMOD_UNSYNCD) { |
cee5a30d | 361 | Demod.output[Demod.len] = 0xfa; |
362 | Demod.syncBit = 0; | |
363 | //Demod.samples = 0; | |
17505ce2 | 364 | Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part |
cee5a30d | 365 | |
17505ce2 | 366 | if (bit & 0x08) { |
cee5a30d | 367 | Demod.syncBit = 0x08; |
368 | } | |
369 | ||
17505ce2 | 370 | if (bit & 0x04) { |
371 | if (Demod.syncBit) { | |
cee5a30d | 372 | bit <<= 4; |
373 | } | |
374 | Demod.syncBit = 0x04; | |
375 | } | |
376 | ||
17505ce2 | 377 | if (bit & 0x02) { |
378 | if (Demod.syncBit) { | |
cee5a30d | 379 | bit <<= 2; |
380 | } | |
381 | Demod.syncBit = 0x02; | |
382 | } | |
383 | ||
17505ce2 | 384 | if (bit & 0x01 && Demod.syncBit) { |
cee5a30d | 385 | Demod.syncBit = 0x01; |
386 | } | |
17505ce2 | 387 | |
388 | if (Demod.syncBit) { | |
cee5a30d | 389 | Demod.len = 0; |
390 | Demod.state = DEMOD_START_OF_COMMUNICATION; | |
391 | Demod.sub = SUB_FIRST_HALF; | |
392 | Demod.bitCount = 0; | |
393 | Demod.shiftReg = 0; | |
cee5a30d | 394 | Demod.samples = 0; |
17505ce2 | 395 | if (Demod.posCount) { |
0ab9002f | 396 | switch (Demod.syncBit) { |
cee5a30d | 397 | case 0x08: Demod.samples = 3; break; |
398 | case 0x04: Demod.samples = 2; break; | |
399 | case 0x02: Demod.samples = 1; break; | |
400 | case 0x01: Demod.samples = 0; break; | |
401 | } | |
402 | // SOF must be long burst... otherwise stay unsynced!!! | |
17505ce2 | 403 | if (!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) { |
cee5a30d | 404 | Demod.state = DEMOD_UNSYNCD; |
405 | } | |
17505ce2 | 406 | } else { |
cee5a30d | 407 | // SOF must be long burst... otherwise stay unsynced!!! |
17505ce2 | 408 | if (!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) { |
cee5a30d | 409 | Demod.state = DEMOD_UNSYNCD; |
410 | error = 0x88; | |
411 | } | |
412 | ||
413 | } | |
414 | error = 0; | |
415 | ||
416 | } | |
17505ce2 | 417 | } else { |
0ab9002f | 418 | // state is DEMOD is in SYNC from here on. |
cee5a30d | 419 | modulation = bit & Demod.syncBit; |
420 | modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit; | |
cee5a30d | 421 | |
422 | Demod.samples += 4; | |
423 | ||
0ab9002f | 424 | if (Demod.posCount == 0) { |
cee5a30d | 425 | Demod.posCount = 1; |
17505ce2 | 426 | if (modulation) { |
cee5a30d | 427 | Demod.sub = SUB_FIRST_HALF; |
17505ce2 | 428 | } else { |
cee5a30d | 429 | Demod.sub = SUB_NONE; |
430 | } | |
17505ce2 | 431 | } else { |
cee5a30d | 432 | Demod.posCount = 0; |
17505ce2 | 433 | if (modulation) { |
434 | if (Demod.sub == SUB_FIRST_HALF) { | |
cee5a30d | 435 | Demod.sub = SUB_BOTH; |
17505ce2 | 436 | } else { |
cee5a30d | 437 | Demod.sub = SUB_SECOND_HALF; |
438 | } | |
17505ce2 | 439 | } else if (Demod.sub == SUB_NONE) { |
440 | if (Demod.state == DEMOD_SOF_COMPLETE) { | |
cee5a30d | 441 | Demod.output[Demod.len] = 0x0f; |
442 | Demod.len++; | |
cee5a30d | 443 | Demod.state = DEMOD_UNSYNCD; |
44964fd1 | 444 | return true; |
17505ce2 | 445 | } else { |
cee5a30d | 446 | Demod.state = DEMOD_ERROR_WAIT; |
447 | error = 0x33; | |
448 | } | |
cee5a30d | 449 | } |
450 | ||
451 | switch(Demod.state) { | |
452 | case DEMOD_START_OF_COMMUNICATION: | |
17505ce2 | 453 | if (Demod.sub == SUB_BOTH) { |
cee5a30d | 454 | Demod.state = DEMOD_START_OF_COMMUNICATION2; |
455 | Demod.posCount = 1; | |
456 | Demod.sub = SUB_NONE; | |
17505ce2 | 457 | } else { |
cee5a30d | 458 | Demod.output[Demod.len] = 0xab; |
459 | Demod.state = DEMOD_ERROR_WAIT; | |
460 | error = 0xd2; | |
461 | } | |
462 | break; | |
463 | case DEMOD_START_OF_COMMUNICATION2: | |
17505ce2 | 464 | if (Demod.sub == SUB_SECOND_HALF) { |
cee5a30d | 465 | Demod.state = DEMOD_START_OF_COMMUNICATION3; |
17505ce2 | 466 | } else { |
cee5a30d | 467 | Demod.output[Demod.len] = 0xab; |
468 | Demod.state = DEMOD_ERROR_WAIT; | |
469 | error = 0xd3; | |
470 | } | |
471 | break; | |
472 | case DEMOD_START_OF_COMMUNICATION3: | |
17505ce2 | 473 | if (Demod.sub == SUB_SECOND_HALF) { |
cee5a30d | 474 | Demod.state = DEMOD_SOF_COMPLETE; |
17505ce2 | 475 | } else { |
cee5a30d | 476 | Demod.output[Demod.len] = 0xab; |
477 | Demod.state = DEMOD_ERROR_WAIT; | |
478 | error = 0xd4; | |
479 | } | |
480 | break; | |
481 | case DEMOD_SOF_COMPLETE: | |
482 | case DEMOD_MANCHESTER_D: | |
483 | case DEMOD_MANCHESTER_E: | |
484 | // OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443) | |
485 | // 00001111 = 1 (0 in 14443) | |
17505ce2 | 486 | if (Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF |
cee5a30d | 487 | Demod.bitCount++; |
488 | Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100; | |
489 | Demod.state = DEMOD_MANCHESTER_D; | |
17505ce2 | 490 | } else if (Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF |
cee5a30d | 491 | Demod.bitCount++; |
492 | Demod.shiftReg >>= 1; | |
493 | Demod.state = DEMOD_MANCHESTER_E; | |
17505ce2 | 494 | } else if (Demod.sub == SUB_BOTH) { |
cee5a30d | 495 | Demod.state = DEMOD_MANCHESTER_F; |
17505ce2 | 496 | } else { |
cee5a30d | 497 | Demod.state = DEMOD_ERROR_WAIT; |
498 | error = 0x55; | |
499 | } | |
500 | break; | |
501 | ||
502 | case DEMOD_MANCHESTER_F: | |
503 | // Tag response does not need to be a complete byte! | |
17505ce2 | 504 | if (Demod.len > 0 || Demod.bitCount > 0) { |
505 | if (Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF | |
506 | Demod.shiftReg >>= (9 - Demod.bitCount); // right align data | |
cee5a30d | 507 | Demod.output[Demod.len] = Demod.shiftReg & 0xff; |
508 | Demod.len++; | |
cee5a30d | 509 | } |
510 | ||
511 | Demod.state = DEMOD_UNSYNCD; | |
44964fd1 | 512 | return true; |
17505ce2 | 513 | } else { |
cee5a30d | 514 | Demod.output[Demod.len] = 0xad; |
515 | Demod.state = DEMOD_ERROR_WAIT; | |
516 | error = 0x03; | |
517 | } | |
518 | break; | |
519 | ||
520 | case DEMOD_ERROR_WAIT: | |
521 | Demod.state = DEMOD_UNSYNCD; | |
522 | break; | |
523 | ||
524 | default: | |
525 | Demod.output[Demod.len] = 0xdd; | |
526 | Demod.state = DEMOD_UNSYNCD; | |
527 | break; | |
528 | } | |
529 | ||
17505ce2 | 530 | if (Demod.bitCount >= 8) { |
cee5a30d | 531 | Demod.shiftReg >>= 1; |
532 | Demod.output[Demod.len] = (Demod.shiftReg & 0xff); | |
533 | Demod.len++; | |
cee5a30d | 534 | Demod.bitCount = 0; |
535 | Demod.shiftReg = 0; | |
536 | } | |
537 | ||
17505ce2 | 538 | if (error) { |
cee5a30d | 539 | Demod.output[Demod.len] = 0xBB; |
540 | Demod.len++; | |
541 | Demod.output[Demod.len] = error & 0xFF; | |
542 | Demod.len++; | |
543 | Demod.output[Demod.len] = 0xBB; | |
544 | Demod.len++; | |
545 | Demod.output[Demod.len] = bit & 0xFF; | |
546 | Demod.len++; | |
547 | Demod.output[Demod.len] = Demod.buffer & 0xFF; | |
548 | Demod.len++; | |
549 | // Look harder ;-) | |
550 | Demod.output[Demod.len] = Demod.buffer2 & 0xFF; | |
551 | Demod.len++; | |
552 | Demod.output[Demod.len] = Demod.syncBit & 0xFF; | |
553 | Demod.len++; | |
554 | Demod.output[Demod.len] = 0xBB; | |
555 | Demod.len++; | |
44964fd1 | 556 | return true; |
cee5a30d | 557 | } |
558 | ||
559 | } | |
560 | ||
561 | } // end (state != UNSYNCED) | |
562 | ||
17505ce2 | 563 | return false; |
cee5a30d | 564 | } |
565 | ||
566 | //============================================================================= | |
1e262141 | 567 | // Finally, a `sniffer' for iClass communication |
cee5a30d | 568 | // Both sides of communication! |
569 | //============================================================================= | |
570 | ||
571 | //----------------------------------------------------------------------------- | |
572 | // Record the sequence of commands sent by the reader to the tag, with | |
573 | // triggering so that we start recording at the point that the tag is moved | |
574 | // near the reader. | |
575 | //----------------------------------------------------------------------------- | |
17505ce2 | 576 | void RAMFUNC SnoopIClass(void) { |
cee5a30d | 577 | |
17505ce2 | 578 | // We won't start recording the frames that we acquire until we trigger; |
579 | // a good trigger condition to get started is probably when we see a | |
580 | // response from the tag. | |
581 | //int triggered = false; // false to wait first for card | |
cee5a30d | 582 | |
17505ce2 | 583 | // The command (reader -> tag) that we're receiving. |
cee5a30d | 584 | // The length of a received command will in most cases be no more than 18 bytes. |
585 | // So 32 should be enough! | |
f71f4deb | 586 | #define ICLASS_BUFFER_SIZE 32 |
587 | uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE]; | |
17505ce2 | 588 | // The response (tag -> reader) that we're receiving. |
f71f4deb | 589 | uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE]; |
17505ce2 | 590 | |
591 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
592 | ||
593 | // free all BigBuf memory | |
f71f4deb | 594 | BigBuf_free(); |
17505ce2 | 595 | // The DMA buffer, used to stream samples from the FPGA |
596 | uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE); | |
597 | ||
44964fd1 | 598 | set_tracing(true); |
3000dc4e | 599 | clear_trace(); |
17505ce2 | 600 | iso14a_set_trigger(false); |
cee5a30d | 601 | |
f71f4deb | 602 | int lastRxCounter; |
17505ce2 | 603 | uint8_t *upTo; |
604 | int smpl; | |
605 | int maxBehindBy = 0; | |
cee5a30d | 606 | |
17505ce2 | 607 | // Count of samples received so far, so that we can include timing |
608 | // information in the trace buffer. | |
609 | int samples = 0; | |
610 | rsamples = 0; | |
cee5a30d | 611 | |
17505ce2 | 612 | // Set up the demodulator for tag -> reader responses. |
17cba269 | 613 | Demod.output = tagToReaderResponse; |
17505ce2 | 614 | Demod.len = 0; |
615 | Demod.state = DEMOD_UNSYNCD; | |
cee5a30d | 616 | |
17505ce2 | 617 | // Setup for the DMA. |
618 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); | |
619 | upTo = dmaBuf; | |
620 | lastRxCounter = DMA_BUFFER_SIZE; | |
621 | FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); | |
cee5a30d | 622 | |
17505ce2 | 623 | // And the reader -> tag commands |
624 | memset(&Uart, 0, sizeof(Uart)); | |
17cba269 | 625 | Uart.output = readerToTagCmd; |
17505ce2 | 626 | Uart.byteCntMax = 32; // was 100 (greg)//////////////////////////////////////////////////////////////////////// |
627 | Uart.state = STATE_UNSYNCD; | |
cee5a30d | 628 | |
17505ce2 | 629 | // And put the FPGA in the appropriate mode |
630 | // Signal field is off with the appropriate LED | |
631 | LED_D_OFF(); | |
632 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER); | |
633 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
cee5a30d | 634 | |
81012e67 | 635 | uint32_t time_0 = GetCountSspClk(); |
55eaed8f MHS |
636 | uint32_t time_start = 0; |
637 | uint32_t time_stop = 0; | |
81012e67 | 638 | |
17505ce2 | 639 | int div = 0; |
640 | //int div2 = 0; | |
641 | int decbyte = 0; | |
642 | int decbyter = 0; | |
cee5a30d | 643 | |
17505ce2 | 644 | // And now we loop, receiving samples. |
645 | for (;;) { | |
646 | LED_A_ON(); | |
647 | WDT_HIT(); | |
648 | int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1); | |
649 | if (behindBy > maxBehindBy) { | |
650 | maxBehindBy = behindBy; | |
651 | if (behindBy > (9 * DMA_BUFFER_SIZE / 10)) { | |
652 | Dbprintf("blew circular buffer! behindBy=0x%x", behindBy); | |
653 | goto done; | |
654 | } | |
cee5a30d | 655 | } |
17505ce2 | 656 | if (behindBy < 1) continue; |
cee5a30d | 657 | |
17505ce2 | 658 | LED_A_OFF(); |
659 | smpl = upTo[0]; | |
660 | upTo++; | |
661 | lastRxCounter -= 1; | |
662 | if (upTo - dmaBuf > DMA_BUFFER_SIZE) { | |
663 | upTo -= DMA_BUFFER_SIZE; | |
664 | lastRxCounter += DMA_BUFFER_SIZE; | |
665 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo; | |
666 | AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE; | |
667 | } | |
668 | ||
669 | //samples += 4; | |
670 | samples += 1; | |
671 | ||
672 | if (smpl & 0xF) { | |
673 | decbyte ^= (1 << (3 - div)); | |
674 | } | |
675 | ||
676 | // FOR READER SIDE COMMUMICATION... | |
677 | ||
678 | decbyter <<= 2; | |
679 | decbyter ^= (smpl & 0x30); | |
680 | ||
681 | div++; | |
682 | ||
683 | if ((div + 1) % 2 == 0) { | |
684 | smpl = decbyter; | |
685 | if (OutOfNDecoding((smpl & 0xF0) >> 4)) { | |
686 | rsamples = samples - Uart.samples; | |
687 | time_stop = (GetCountSspClk()-time_0) << 4; | |
688 | LED_C_ON(); | |
689 | ||
690 | //if (!LogTrace(Uart.output, Uart.byteCnt, rsamples, Uart.parityBits,true)) break; | |
691 | //if (!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, true)) break; | |
692 | uint8_t parity[MAX_PARITY_SIZE]; | |
693 | GetParity(Uart.output, Uart.byteCnt, parity); | |
694 | LogTrace(Uart.output, Uart.byteCnt, time_start, time_stop, parity, true); | |
695 | ||
696 | /* And ready to receive another command. */ | |
697 | Uart.state = STATE_UNSYNCD; | |
698 | /* And also reset the demod code, which might have been */ | |
699 | /* false-triggered by the commands from the reader. */ | |
700 | Demod.state = DEMOD_UNSYNCD; | |
701 | LED_B_OFF(); | |
702 | Uart.byteCnt = 0; | |
703 | } else { | |
704 | time_start = (GetCountSspClk()-time_0) << 4; | |
705 | } | |
706 | decbyter = 0; | |
707 | } | |
708 | ||
709 | if (div > 3) { | |
710 | smpl = decbyte; | |
711 | if (ManchesterDecoding(smpl & 0x0F)) { | |
712 | time_stop = (GetCountSspClk()-time_0) << 4; | |
713 | ||
714 | rsamples = samples - Demod.samples; | |
715 | LED_B_ON(); | |
716 | ||
717 | uint8_t parity[MAX_PARITY_SIZE]; | |
718 | GetParity(Demod.output, Demod.len, parity); | |
719 | LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false); | |
720 | ||
721 | // And ready to receive another response. | |
722 | memset(&Demod, 0, sizeof(Demod)); | |
723 | Demod.output = tagToReaderResponse; | |
724 | Demod.state = DEMOD_UNSYNCD; | |
725 | LED_C_OFF(); | |
726 | } else { | |
727 | time_start = (GetCountSspClk()-time_0) << 4; | |
728 | } | |
729 | ||
730 | div = 0; | |
731 | decbyte = 0x00; | |
cee5a30d | 732 | } |
cee5a30d | 733 | |
17505ce2 | 734 | if (BUTTON_PRESS()) { |
735 | DbpString("cancelled_a"); | |
736 | goto done; | |
737 | } | |
738 | } | |
cee5a30d | 739 | |
17505ce2 | 740 | DbpString("COMMAND FINISHED"); |
cee5a30d | 741 | |
17505ce2 | 742 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); |
3000dc4e | 743 | Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); |
cee5a30d | 744 | |
745 | done: | |
17505ce2 | 746 | AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; |
747 | Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt); | |
3000dc4e | 748 | Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]); |
17505ce2 | 749 | LEDsoff(); |
1e262141 | 750 | } |
751 | ||
912a3e94 | 752 | void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) { |
17505ce2 | 753 | int i; |
754 | for (i = 0; i < 8; i++) { | |
912a3e94 | 755 | rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5); |
1e262141 | 756 | } |
757 | } | |
758 | ||
3d2c9c9b | 759 | // Encode SOF only |
17505ce2 | 760 | static void CodeIClassTagSOF() { |
81012e67 MHS |
761 | //So far a dummy implementation, not used |
762 | //int lastProxToAirDuration =0; | |
1e262141 | 763 | |
81012e67 | 764 | ToSendReset(); |
1e262141 | 765 | // Send SOF |
645c960f | 766 | ToSend[++ToSendMax] = 0x1D; |
17505ce2 | 767 | // lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning |
81012e67 | 768 | |
1e262141 | 769 | // Convert from last byte pos to length |
770 | ToSendMax++; | |
771 | } | |
1e262141 | 772 | |
17505ce2 | 773 | static void AppendCrc(uint8_t *data, int len) { |
774 | ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1); | |
775 | } | |
81cd0474 | 776 | |
b67f7ec3 | 777 | |
ff7bb4ef MHS |
778 | /** |
779 | * @brief Does the actual simulation | |
ff7bb4ef | 780 | */ |
17505ce2 | 781 | int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) { |
0ab9002f | 782 | |
b67f7ec3 MHS |
783 | // free eventually allocated BigBuf memory |
784 | BigBuf_free_keep_EM(); | |
55eaed8f | 785 | |
8ddb81a2 | 786 | State cipher_state_KC; |
787 | State cipher_state_KD; | |
0ab9002f | 788 | |
789 | uint8_t *emulator = BigBuf_get_EM_addr(); | |
790 | uint8_t *csn = emulator; | |
791 | uint8_t sof_data[] = { 0x0F } ; | |
792 | ||
1e262141 | 793 | // CSN followed by two CRC bytes |
b67f7ec3 MHS |
794 | uint8_t anticoll_data[10] = { 0 }; |
795 | uint8_t csn_data[10] = { 0 }; | |
17505ce2 | 796 | memcpy(csn_data, csn, sizeof(csn_data)); |
797 | Dbprintf("Simulating CSN %02x%02x%02x%02x%02x%02x%02x%02x", csn[0], csn[1], csn[2], csn[3], csn[4], csn[5], csn[6], csn[7]); | |
1e262141 | 798 | |
1e262141 | 799 | // Construct anticollision-CSN |
17505ce2 | 800 | rotateCSN(csn_data, anticoll_data); |
1e262141 | 801 | |
802 | // Compute CRC on both CSNs | |
0ab9002f | 803 | AppendCrc(anticoll_data, 8); |
804 | AppendCrc(csn_data, 8); | |
b67f7ec3 | 805 | |
8ddb81a2 | 806 | uint8_t diversified_key_d[8] = { 0 }; |
807 | uint8_t diversified_key_c[8] = { 0 }; | |
b67f7ec3 | 808 | // e-Purse |
0ab9002f | 809 | uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
810 | //uint8_t card_challenge_data[8] = { 0 }; | |
811 | if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
8ddb81a2 | 812 | // Get the diversified keys from emulator memory |
813 | memcpy(diversified_key_d, emulator + (8 * 3), 8); | |
814 | memcpy(diversified_key_c, emulator + (8 * 4), 8); | |
0ab9002f | 815 | // Card challenge, a.k.a e-purse is on block 2 |
17505ce2 | 816 | memcpy(card_challenge_data, emulator + (8 * 2), 8); |
8ddb81a2 | 817 | // Precalculate the cipher states, feeding it the CC |
818 | cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); | |
819 | cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); | |
b67f7ec3 | 820 | } |
0ab9002f | 821 | // save card challenge for sim2,4 attack |
822 | if (reader_mac_buf != NULL) { | |
823 | memcpy(reader_mac_buf, card_challenge_data, 8); | |
824 | } | |
1e262141 | 825 | |
ff7bb4ef | 826 | int exitLoop = 0; |
1e262141 | 827 | // Reader 0a |
828 | // Tag 0f | |
829 | // Reader 0c | |
830 | // Tag anticoll. CSN | |
831 | // Reader 81 anticoll. CSN | |
832 | // Tag CSN | |
833 | ||
55eaed8f | 834 | uint8_t *modulated_response; |
b19caaef | 835 | int modulated_response_size = 0; |
17505ce2 | 836 | uint8_t *trace_data = NULL; |
55eaed8f | 837 | int trace_data_size = 0; |
1e262141 | 838 | |
645c960f | 839 | // Respond SOF -- takes 1 bytes |
b67f7ec3 MHS |
840 | uint8_t *resp_sof = BigBuf_malloc(2); |
841 | int resp_sof_Len; | |
1e262141 | 842 | |
843 | // Anticollision CSN (rotated CSN) | |
645c960f | 844 | // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) |
0ab9002f | 845 | uint8_t *resp_anticoll = BigBuf_malloc(22); |
b67f7ec3 | 846 | int resp_anticoll_len; |
1e262141 | 847 | |
0ab9002f | 848 | // CSN (block 0) |
645c960f | 849 | // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte) |
0ab9002f | 850 | uint8_t *resp_csn = BigBuf_malloc(22); |
b67f7ec3 | 851 | int resp_csn_len; |
1e262141 | 852 | |
0ab9002f | 853 | // configuration (block 1) picopass 2ks |
854 | uint8_t *resp_conf = BigBuf_malloc(22); | |
855 | int resp_conf_len; | |
856 | uint8_t conf_data[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00}; | |
857 | AppendCrc(conf_data, 8); | |
858 | ||
859 | // e-Purse (block 2) | |
b3cc5f29 | 860 | // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit) |
0ab9002f | 861 | uint8_t *resp_cc = BigBuf_malloc(18); |
b67f7ec3 | 862 | int resp_cc_len; |
1e262141 | 863 | |
a66f26da | 864 | // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only |
865 | uint8_t *resp_ff = BigBuf_malloc(22); | |
866 | int resp_ff_len; | |
867 | uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; | |
868 | AppendCrc(ff_data, 8); | |
869 | ||
0ab9002f | 870 | // Application Issuer Area (block 5) |
871 | uint8_t *resp_aia = BigBuf_malloc(22); | |
872 | int resp_aia_len; | |
873 | uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00}; | |
874 | AppendCrc(aia_data, 8); | |
875 | ||
f71f4deb | 876 | uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE); |
1e262141 | 877 | int len; |
878 | ||
1e262141 | 879 | // Prepare card messages |
880 | ToSendMax = 0; | |
881 | ||
3d2c9c9b | 882 | // First card answer: SOF only |
1e262141 | 883 | CodeIClassTagSOF(); |
17505ce2 | 884 | memcpy(resp_sof, ToSend, ToSendMax); |
885 | resp_sof_Len = ToSendMax; | |
1e262141 | 886 | |
887 | // Anticollision CSN | |
3d2c9c9b | 888 | CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data)); |
17505ce2 | 889 | memcpy(resp_anticoll, ToSend, ToSendMax); |
890 | resp_anticoll_len = ToSendMax; | |
1e262141 | 891 | |
0ab9002f | 892 | // CSN (block 0) |
3d2c9c9b | 893 | CodeIso15693AsTag(csn_data, sizeof(csn_data)); |
17505ce2 | 894 | memcpy(resp_csn, ToSend, ToSendMax); |
895 | resp_csn_len = ToSendMax; | |
1e262141 | 896 | |
0ab9002f | 897 | // Configuration (block 1) |
3d2c9c9b | 898 | CodeIso15693AsTag(conf_data, sizeof(conf_data)); |
0ab9002f | 899 | memcpy(resp_conf, ToSend, ToSendMax); |
900 | resp_conf_len = ToSendMax; | |
901 | ||
902 | // e-Purse (block 2) | |
3d2c9c9b | 903 | CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); |
0ab9002f | 904 | memcpy(resp_cc, ToSend, ToSendMax); |
905 | resp_cc_len = ToSendMax; | |
906 | ||
a66f26da | 907 | // Kd, Kc (blocks 3 and 4) |
908 | CodeIso15693AsTag(ff_data, sizeof(ff_data)); | |
909 | memcpy(resp_ff, ToSend, ToSendMax); | |
910 | resp_ff_len = ToSendMax; | |
911 | ||
0ab9002f | 912 | // Application Issuer Area (block 5) |
3d2c9c9b | 913 | CodeIso15693AsTag(aia_data, sizeof(aia_data)); |
0ab9002f | 914 | memcpy(resp_aia, ToSend, ToSendMax); |
915 | resp_aia_len = ToSendMax; | |
1e262141 | 916 | |
b19caaef | 917 | //This is used for responding to READ-block commands or other data which is dynamically generated |
a66f26da | 918 | uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer |
919 | uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2); | |
e3dc1e4c | 920 | |
1e262141 | 921 | LED_A_ON(); |
f83cc126 | 922 | bool buttonPressed = false; |
5b12974a | 923 | enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE; |
924 | ||
17505ce2 | 925 | while (!exitLoop) { |
0ab9002f | 926 | WDT_HIT(); |
1e262141 | 927 | LED_B_OFF(); |
e3dc1e4c MHS |
928 | //Signal tracer |
929 | // Can be used to get a trigger for an oscilloscope.. | |
930 | LED_C_OFF(); | |
3fe4ff4f | 931 | |
3d2c9c9b | 932 | uint32_t reader_eof_time = 0; |
933 | len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time); | |
934 | if (len < 0) { | |
f83cc126 | 935 | buttonPressed = true; |
1e262141 | 936 | break; |
81cd0474 | 937 | } |
a66f26da | 938 | |
e3dc1e4c MHS |
939 | //Signal tracer |
940 | LED_C_ON(); | |
1e262141 | 941 | |
0ab9002f | 942 | // Now look at the reader command and provide appropriate responses |
943 | // default is no response: | |
944 | modulated_response = NULL; | |
945 | modulated_response_size = 0; | |
946 | trace_data = NULL; | |
947 | trace_data_size = 0; | |
a66f26da | 948 | |
5b12974a | 949 | if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) { |
950 | // Reader in anticollision phase | |
951 | if (chip_state != HALTED) { | |
952 | modulated_response = resp_sof; | |
953 | modulated_response_size = resp_sof_Len; | |
954 | trace_data = sof_data; | |
955 | trace_data_size = sizeof(sof_data); | |
956 | chip_state = ACTIVATED; | |
957 | } | |
0ab9002f | 958 | |
959 | } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify | |
5b12974a | 960 | // Reader asks for anticollision CSN |
961 | if (chip_state == SELECTED || chip_state == ACTIVATED) { | |
962 | modulated_response = resp_anticoll; | |
963 | modulated_response_size = resp_anticoll_len; | |
964 | trace_data = anticoll_data; | |
965 | trace_data_size = sizeof(anticoll_data); | |
966 | } | |
967 | ||
968 | } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) { | |
969 | // Reader selects anticollision CSN. | |
970 | // Tag sends the corresponding real CSN | |
971 | if (chip_state == ACTIVATED || chip_state == SELECTED) { | |
972 | if (!memcmp(receivedCmd+1, anticoll_data, 8)) { | |
973 | modulated_response = resp_csn; | |
974 | modulated_response_size = resp_csn_len; | |
975 | trace_data = csn_data; | |
976 | trace_data_size = sizeof(csn_data); | |
977 | chip_state = SELECTED; | |
978 | } else { | |
979 | chip_state = IDLE; | |
980 | } | |
981 | } else if (chip_state == HALTED) { | |
982 | // RESELECT with CSN | |
983 | if (!memcmp(receivedCmd+1, csn_data, 8)) { | |
984 | modulated_response = resp_csn; | |
985 | modulated_response_size = resp_csn_len; | |
986 | trace_data = csn_data; | |
987 | trace_data_size = sizeof(csn_data); | |
988 | chip_state = SELECTED; | |
989 | } | |
990 | } | |
a66f26da | 991 | |
0ab9002f | 992 | } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block |
993 | uint16_t blockNo = receivedCmd[1]; | |
5b12974a | 994 | if (chip_state == SELECTED) { |
995 | if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { | |
996 | // provide defaults for blocks 0 ... 5 | |
997 | switch (blockNo) { | |
998 | case 0: // csn (block 00) | |
999 | modulated_response = resp_csn; | |
1000 | modulated_response_size = resp_csn_len; | |
1001 | trace_data = csn_data; | |
1002 | trace_data_size = sizeof(csn_data); | |
1003 | break; | |
1004 | case 1: // configuration (block 01) | |
1005 | modulated_response = resp_conf; | |
1006 | modulated_response_size = resp_conf_len; | |
1007 | trace_data = conf_data; | |
1008 | trace_data_size = sizeof(conf_data); | |
1009 | break; | |
1010 | case 2: // e-purse (block 02) | |
1011 | modulated_response = resp_cc; | |
1012 | modulated_response_size = resp_cc_len; | |
1013 | trace_data = card_challenge_data; | |
1014 | trace_data_size = sizeof(card_challenge_data); | |
1015 | // set epurse of sim2,4 attack | |
1016 | if (reader_mac_buf != NULL) { | |
1017 | memcpy(reader_mac_buf, card_challenge_data, 8); | |
1018 | } | |
1019 | break; | |
1020 | case 3: | |
1021 | case 4: // Kd, Kc, always respond with 0xff bytes | |
1022 | modulated_response = resp_ff; | |
1023 | modulated_response_size = resp_ff_len; | |
1024 | trace_data = ff_data; | |
1025 | trace_data_size = sizeof(ff_data); | |
1026 | break; | |
1027 | case 5: // Application Issuer Area (block 05) | |
1028 | modulated_response = resp_aia; | |
1029 | modulated_response_size = resp_aia_len; | |
1030 | trace_data = aia_data; | |
1031 | trace_data_size = sizeof(aia_data); | |
1032 | break; | |
1033 | // default: don't respond | |
1034 | } | |
1035 | } else if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
1036 | if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes | |
a66f26da | 1037 | modulated_response = resp_ff; |
1038 | modulated_response_size = resp_ff_len; | |
1039 | trace_data = ff_data; | |
1040 | trace_data_size = sizeof(ff_data); | |
5b12974a | 1041 | } else { // use data from emulator memory |
1042 | memcpy(data_generic_trace, emulator + 8*blockNo, 8); | |
1043 | AppendCrc(data_generic_trace, 8); | |
1044 | trace_data = data_generic_trace; | |
1045 | trace_data_size = 10; | |
1046 | CodeIso15693AsTag(trace_data, trace_data_size); | |
1047 | memcpy(data_response, ToSend, ToSendMax); | |
1048 | modulated_response = data_response; | |
1049 | modulated_response_size = ToSendMax; | |
1050 | } | |
0ab9002f | 1051 | } |
5b12974a | 1052 | } |
1053 | ||
1054 | } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD | |
8ddb81a2 | 1055 | || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) { |
5b12974a | 1056 | // Read e-purse (88 02 || 18 02) |
1057 | if (chip_state == SELECTED) { | |
1058 | modulated_response = resp_cc; | |
1059 | modulated_response_size = resp_cc_len; | |
1060 | trace_data = card_challenge_data; | |
1061 | trace_data_size = sizeof(card_challenge_data); | |
1062 | LED_B_ON(); | |
1063 | } | |
1064 | ||
8ddb81a2 | 1065 | } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC |
1066 | || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) { | |
5b12974a | 1067 | // Reader random and reader MAC!!! |
1068 | if (chip_state == SELECTED) { | |
1069 | if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
1070 | //NR, from reader, is in receivedCmd+1 | |
8ddb81a2 | 1071 | if (receivedCmd[0] == ICLASS_CMD_CHECK_KC) { |
1072 | opt_doTagMAC_2(cipher_state_KC, receivedCmd+1, data_generic_trace, diversified_key_c); | |
1073 | } else { | |
1074 | opt_doTagMAC_2(cipher_state_KD, receivedCmd+1, data_generic_trace, diversified_key_d); | |
1075 | } | |
a66f26da | 1076 | trace_data = data_generic_trace; |
5b12974a | 1077 | trace_data_size = 4; |
a66f26da | 1078 | CodeIso15693AsTag(trace_data, trace_data_size); |
1079 | memcpy(data_response, ToSend, ToSendMax); | |
1080 | modulated_response = data_response; | |
1081 | modulated_response_size = ToSendMax; | |
5b12974a | 1082 | //exitLoop = true; |
1083 | } else { // Not fullsim, we don't respond | |
1084 | // We do not know what to answer, so lets keep quiet | |
1085 | if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) { | |
1086 | if (reader_mac_buf != NULL) { | |
1087 | // save NR and MAC for sim 2,4 | |
1088 | memcpy(reader_mac_buf + 8, receivedCmd + 1, 8); | |
1089 | } | |
1090 | exitLoop = true; | |
1091 | } | |
a66f26da | 1092 | } |
0ab9002f | 1093 | } |
1094 | ||
5b12974a | 1095 | } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) { |
1096 | if (chip_state == SELECTED) { | |
1097 | // Reader ends the session | |
1098 | chip_state = HALTED; | |
1099 | } | |
0ab9002f | 1100 | |
5b12974a | 1101 | } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06 |
1102 | //Read 4 blocks | |
1103 | if (chip_state == SELECTED) { | |
8ddb81a2 | 1104 | memcpy(data_generic_trace, emulator + receivedCmd[1]*8, 8 * 4); |
5b12974a | 1105 | AppendCrc(data_generic_trace, 8 * 4); |
b19caaef | 1106 | trace_data = data_generic_trace; |
5b12974a | 1107 | trace_data_size = 8 * 4 + 2; |
3d2c9c9b | 1108 | CodeIso15693AsTag(trace_data, trace_data_size); |
b67f7ec3 MHS |
1109 | memcpy(data_response, ToSend, ToSendMax); |
1110 | modulated_response = data_response; | |
1111 | modulated_response_size = ToSendMax; | |
ff7bb4ef | 1112 | } |
b67f7ec3 | 1113 | |
5b12974a | 1114 | } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) { |
0ab9002f | 1115 | // We're expected to respond with the data+crc, exactly what's already in the receivedCmd |
1116 | // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b | |
5b12974a | 1117 | if (chip_state == SELECTED) { |
8ddb81a2 | 1118 | uint8_t blockNo = receivedCmd[1]; |
1119 | if (blockNo == 2) { // update e-purse | |
1120 | memcpy(card_challenge_data, receivedCmd+2, 8); | |
1121 | CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data)); | |
1122 | memcpy(resp_cc, ToSend, ToSendMax); | |
1123 | resp_cc_len = ToSendMax; | |
1124 | cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); | |
1125 | cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); | |
1126 | if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
1127 | memcpy(emulator + 8*2, card_challenge_data, 8); | |
1128 | } | |
1129 | } else if (blockNo == 3) { // update Kd | |
1130 | for (int i = 0; i < 8; i++){ | |
1131 | diversified_key_d[i] = diversified_key_d[i] ^ receivedCmd[2 + i]; | |
1132 | } | |
1133 | cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d); | |
1134 | if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
1135 | memcpy(emulator + 8*3, diversified_key_d, 8); | |
1136 | } | |
1137 | } else if (blockNo == 4) { // update Kc | |
1138 | for(int i = 0; i < 8; i++){ | |
1139 | diversified_key_c[i] = diversified_key_c[i] ^ receivedCmd[2 + i]; | |
1140 | } | |
1141 | cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c); | |
1142 | if (simulationMode == ICLASS_SIM_MODE_FULL) { | |
1143 | memcpy(emulator + 8*4, diversified_key_c, 8); | |
1144 | } | |
1145 | } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block | |
1146 | memcpy(emulator + 8*blockNo, receivedCmd+2, 8); | |
1147 | } | |
5b12974a | 1148 | memcpy(data_generic_trace, receivedCmd + 2, 8); |
1149 | AppendCrc(data_generic_trace, 8); | |
1150 | trace_data = data_generic_trace; | |
1151 | trace_data_size = 10; | |
1152 | CodeIso15693AsTag(trace_data, trace_data_size); | |
1153 | memcpy(data_response, ToSend, ToSendMax); | |
1154 | modulated_response = data_response; | |
1155 | modulated_response_size = ToSendMax; | |
1156 | } | |
1157 | ||
1158 | } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) { | |
0ab9002f | 1159 | // Pagesel |
5b12974a | 1160 | if (chip_state == SELECTED) { |
1161 | // Pagesel enables to select a page in the selected chip memory and return its configuration block | |
1162 | // Chips with a single page will not answer to this command | |
1163 | // It appears we're fine ignoring this. | |
1164 | // Otherwise, we should answer 8bytes (block) + 2bytes CRC | |
1165 | } | |
0ab9002f | 1166 | |
e49d31c0 | 1167 | } else if (receivedCmd[0] == 0x26 && len == 5) { |
1168 | // standard ISO15693 INVENTORY command. Ignore. | |
1169 | ||
17505ce2 | 1170 | } else { |
5b12974a | 1171 | // don't know how to handle this command |
3d2c9c9b | 1172 | char debug_message[250]; // should be enough |
1173 | sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len); | |
1174 | for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) { | |
1175 | sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]); | |
1176 | } | |
1177 | Dbprintf("%s", debug_message); | |
1e262141 | 1178 | // Do not respond |
1e262141 | 1179 | } |
1180 | ||
55eaed8f | 1181 | /** |
a66f26da | 1182 | A legit tag has about 311,5us delay between reader EOT and tag SOF. |
55eaed8f | 1183 | **/ |
17505ce2 | 1184 | if (modulated_response_size > 0) { |
3d2c9c9b | 1185 | uint32_t response_time = reader_eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM - DELAY_ARM_TO_READER_SIM; |
1186 | TransmitTo15693Reader(modulated_response, modulated_response_size, response_time, false); | |
1187 | LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false); | |
81cd0474 | 1188 | } |
f83cc126 | 1189 | |
81cd0474 | 1190 | } |
1e262141 | 1191 | |
1e262141 | 1192 | LED_A_OFF(); |
1193 | LED_B_OFF(); | |
7b941c8d MHS |
1194 | LED_C_OFF(); |
1195 | ||
17505ce2 | 1196 | if (buttonPressed) |
f83cc126 MHS |
1197 | { |
1198 | DbpString("Button pressed"); | |
1199 | } | |
f83cc126 | 1200 | return buttonPressed; |
1e262141 | 1201 | } |
1202 | ||
17505ce2 | 1203 | /** |
1204 | * @brief SimulateIClass simulates an iClass card. | |
1205 | * @param arg0 type of simulation | |
1206 | * - 0 uses the first 8 bytes in usb data as CSN | |
1207 | * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified | |
1208 | * in the usb data. This mode collects MAC from the reader, in order to do an offline | |
1209 | * attack on the keys. For more info, see "dismantling iclass" and proxclone.com. | |
1210 | * - Other : Uses the default CSN (031fec8af7ff12e0) | |
1211 | * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only) | |
1212 | * @param arg2 | |
1213 | * @param datain | |
1214 | */ | |
1215 | void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) { | |
1216 | uint32_t simType = arg0; | |
1217 | uint32_t numberOfCSNS = arg1; | |
0ab9002f | 1218 | |
3d2c9c9b | 1219 | // setup hardware for simulation: |
17505ce2 | 1220 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
3d2c9c9b | 1221 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); |
a66f26da | 1222 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); |
3d2c9c9b | 1223 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); |
1224 | StartCountSspClk(); | |
e3dc1e4c | 1225 | |
17505ce2 | 1226 | // Enable and clear the trace |
1227 | set_tracing(true); | |
1228 | clear_trace(); | |
1229 | //Use the emulator memory for SIM | |
1230 | uint8_t *emulator = BigBuf_get_EM_addr(); | |
e3dc1e4c | 1231 | |
0ab9002f | 1232 | if (simType == ICLASS_SIM_MODE_CSN) { |
17505ce2 | 1233 | // Use the CSN from commandline |
1234 | memcpy(emulator, datain, 8); | |
0ab9002f | 1235 | doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); |
1236 | } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) { | |
17505ce2 | 1237 | //Default CSN |
1238 | uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 }; | |
1239 | // Use the CSN from commandline | |
1240 | memcpy(emulator, csn_crc, 8); | |
0ab9002f | 1241 | doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL); |
1242 | } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) { | |
17505ce2 | 1243 | uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 }; |
1244 | Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS); | |
1245 | // In this mode, a number of csns are within datain. We'll simulate each one, one at a time | |
0ab9002f | 1246 | // in order to collect MAC's from the reader. This can later be used in an offline-attack |
17505ce2 | 1247 | // in order to obtain the keys, as in the "dismantling iclass"-paper. |
0ab9002f | 1248 | int i; |
1249 | for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) { | |
1250 | // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response). | |
17505ce2 | 1251 | memcpy(emulator, datain+(i*8), 8); |
0ab9002f | 1252 | if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) { |
1253 | // Button pressed | |
1254 | break; | |
1e262141 | 1255 | } |
3d2c9c9b | 1256 | Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x", |
1257 | datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3], | |
1258 | datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]); | |
1259 | Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x", | |
5b12974a | 1260 | mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11], |
1261 | mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]); | |
1262 | SpinDelay(100); // give the reader some time to prepare for next CSN | |
1e262141 | 1263 | } |
0ab9002f | 1264 | cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16); |
1265 | } else if (simType == ICLASS_SIM_MODE_FULL) { | |
17505ce2 | 1266 | //This is 'full sim' mode, where we use the emulator storage for data. |
0ab9002f | 1267 | doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL); |
17505ce2 | 1268 | } else { |
1269 | // We may want a mode here where we hardcode the csns to use (from proxclone). | |
1270 | // That will speed things up a little, but not required just yet. | |
1271 | Dbprintf("The mode is not implemented, reserved for future use"); | |
1e262141 | 1272 | } |
17505ce2 | 1273 | Dbprintf("Done..."); |
1e262141 | 1274 | |
1e262141 | 1275 | } |
1276 | ||
17505ce2 | 1277 | |
1e262141 | 1278 | /// THE READER CODE |
1279 | ||
1280 | //----------------------------------------------------------------------------- | |
1281 | // Transmit the command (to the tag) that was placed in ToSend[]. | |
1282 | //----------------------------------------------------------------------------- | |
17505ce2 | 1283 | static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) { |
1284 | int c; | |
1285 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1286 | AT91C_BASE_SSC->SSC_THR = 0x00; | |
1287 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); | |
1288 | ||
1289 | if (wait) { | |
1290 | if (*wait < 10) *wait = 10; | |
1291 | ||
1292 | for (c = 0; c < *wait;) { | |
1293 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1294 | AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing! | |
1295 | c++; | |
1296 | } | |
1297 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1298 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1299 | (void)r; | |
1300 | } | |
1301 | WDT_HIT(); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | uint8_t sendbyte; | |
1306 | bool firstpart = true; | |
1307 | c = 0; | |
1308 | for (;;) { | |
1309 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { | |
1310 | ||
1311 | // DOUBLE THE SAMPLES! | |
1312 | if (firstpart) { | |
1313 | sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4); | |
1314 | } else { | |
1315 | sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4); | |
1316 | c++; | |
1317 | } | |
1318 | if (sendbyte == 0xff) { | |
1319 | sendbyte = 0xfe; | |
1320 | } | |
1321 | AT91C_BASE_SSC->SSC_THR = sendbyte; | |
1322 | firstpart = !firstpart; | |
1323 | ||
1324 | if (c >= len) { | |
1325 | break; | |
1326 | } | |
1327 | } | |
1328 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { | |
1329 | volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR; | |
1330 | (void)r; | |
1331 | } | |
1332 | WDT_HIT(); | |
1333 | } | |
1334 | if (samples && wait) *samples = (c + *wait) << 3; | |
1e262141 | 1335 | } |
1336 | ||
1337 | ||
1338 | //----------------------------------------------------------------------------- | |
1339 | // Prepare iClass reader command to send to FPGA | |
1340 | //----------------------------------------------------------------------------- | |
17505ce2 | 1341 | void CodeIClassCommand(const uint8_t *cmd, int len) { |
1342 | int i, j, k; | |
1343 | ||
1344 | ToSendReset(); | |
1345 | ||
1346 | // Start of Communication: 1 out of 4 | |
1347 | ToSend[++ToSendMax] = 0xf0; | |
1348 | ToSend[++ToSendMax] = 0x00; | |
1349 | ToSend[++ToSendMax] = 0x0f; | |
1350 | ToSend[++ToSendMax] = 0x00; | |
1351 | ||
1352 | // Modulate the bytes | |
1353 | for (i = 0; i < len; i++) { | |
1354 | uint8_t b = cmd[i]; | |
1355 | for (j = 0; j < 4; j++) { | |
1356 | for (k = 0; k < 4; k++) { | |
1357 | if (k == (b & 3)) { | |
1358 | ToSend[++ToSendMax] = 0xf0; | |
1359 | } else { | |
1360 | ToSend[++ToSendMax] = 0x00; | |
1361 | } | |
e3dc1e4c | 1362 | } |
17505ce2 | 1363 | b >>= 2; |
1364 | } | |
1365 | } | |
1366 | ||
1367 | // End of Communication | |
1368 | ToSend[++ToSendMax] = 0x00; | |
1369 | ToSend[++ToSendMax] = 0x00; | |
1370 | ToSend[++ToSendMax] = 0xf0; | |
1371 | ToSend[++ToSendMax] = 0x00; | |
1372 | ||
1373 | // Convert from last character reference to length | |
1374 | ToSendMax++; | |
1e262141 | 1375 | } |
1376 | ||
17505ce2 | 1377 | static void ReaderTransmitIClass(uint8_t *frame, int len) { |
6a1f2d82 | 1378 | int wait = 0; |
1379 | int samples = 0; | |
1380 | ||
1381 | // This is tied to other size changes | |
17505ce2 | 1382 | CodeIClassCommand(frame, len); |
6a1f2d82 | 1383 | |
1384 | // Select the card | |
1385 | TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait); | |
17505ce2 | 1386 | if (trigger) |
6a1f2d82 | 1387 | LED_A_ON(); |
1388 | ||
1389 | // Store reader command in buffer | |
d9de20fa | 1390 | uint8_t par[MAX_PARITY_SIZE]; |
1391 | GetParity(frame, len, par); | |
1392 | LogTrace(frame, len, rsamples, rsamples, par, true); | |
1e262141 | 1393 | } |
1394 | ||
1395 | //----------------------------------------------------------------------------- | |
1396 | // Wait a certain time for tag response | |
44964fd1 | 1397 | // If a response is captured return true |
1398 | // If it takes too long return false | |
1e262141 | 1399 | //----------------------------------------------------------------------------- |
17505ce2 | 1400 | static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) { |
1401 | //uint8_t *buffer | |
1e262141 | 1402 | // buffer needs to be 512 bytes |
1403 | int c; | |
1404 | ||
1405 | // Set FPGA mode to "reader listen mode", no modulation (listen | |
1406 | // only, since we are receiving, not transmitting). | |
1407 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_LISTEN); | |
1408 | ||
1409 | // Now get the answer from the card | |
1410 | Demod.output = receivedResponse; | |
1411 | Demod.len = 0; | |
1412 | Demod.state = DEMOD_UNSYNCD; | |
1413 | ||
1414 | uint8_t b; | |
1415 | if (elapsed) *elapsed = 0; | |
1416 | ||
44964fd1 | 1417 | bool skip = false; |
1e262141 | 1418 | |
1419 | c = 0; | |
17505ce2 | 1420 | for (;;) { |
1e262141 | 1421 | WDT_HIT(); |
1422 | ||
17505ce2 | 1423 | if (BUTTON_PRESS()) return false; |
1e262141 | 1424 | |
17505ce2 | 1425 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) { |
1e262141 | 1426 | AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!! |
1427 | if (elapsed) (*elapsed)++; | |
1428 | } | |
17505ce2 | 1429 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { |
a66f26da | 1430 | if (c < timeout) { |
1431 | c++; | |
1432 | } else { | |
1433 | return false; | |
17505ce2 | 1434 | } |
1e262141 | 1435 | b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; |
1436 | skip = !skip; | |
17505ce2 | 1437 | if (skip) continue; |
1438 | ||
1439 | if (ManchesterDecoding(b & 0x0f)) { | |
1e262141 | 1440 | *samples = c << 3; |
44964fd1 | 1441 | return true; |
1e262141 | 1442 | } |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | ||
17505ce2 | 1447 | static int ReaderReceiveIClass(uint8_t *receivedAnswer) { |
1448 | int samples = 0; | |
1449 | if (!GetIClassAnswer(receivedAnswer, 160, &samples, 0)) { | |
1450 | return false; | |
1451 | } | |
1452 | rsamples += samples; | |
1453 | uint8_t parity[MAX_PARITY_SIZE]; | |
1454 | GetParity(receivedAnswer, Demod.len, parity); | |
1455 | LogTrace(receivedAnswer, Demod.len, rsamples, rsamples, parity, false); | |
1456 | if (samples == 0) return false; | |
1457 | return Demod.len; | |
1e262141 | 1458 | } |
1459 | ||
17505ce2 | 1460 | static void setupIclassReader() { |
1461 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); | |
1462 | // Reset trace buffer | |
1463 | set_tracing(true); | |
1464 | clear_trace(); | |
1465 | ||
1466 | // Setup SSC | |
1467 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A); | |
1468 | // Start from off (no field generated) | |
1469 | // Signal field is off with the appropriate LED | |
1470 | LED_D_OFF(); | |
1471 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1472 | SpinDelay(200); | |
1473 | ||
1474 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
1475 | ||
1476 | // Now give it time to spin up. | |
1477 | // Signal field is on with the appropriate LED | |
1478 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD); | |
1479 | SpinDelay(200); | |
1480 | LED_A_ON(); | |
aa41c605 MHS |
1481 | |
1482 | } | |
1483 | ||
17505ce2 | 1484 | static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) { |
1485 | while (retries-- > 0) { | |
c8dd9b09 | 1486 | ReaderTransmitIClass(command, cmdsize); |
17505ce2 | 1487 | if (expected_size == ReaderReceiveIClass(resp)) { |
aa53efc3 | 1488 | return true; |
c8dd9b09 MHS |
1489 | } |
1490 | } | |
aa53efc3 | 1491 | return false;//Error |
c8dd9b09 MHS |
1492 | } |
1493 | ||
1494 | /** | |
1495 | * @brief Talks to an iclass tag, sends the commands to get CSN and CC. | |
1496 | * @param card_data where the CSN and CC are stored for return | |
1497 | * @return 0 = fail | |
1498 | * 1 = Got CSN | |
1499 | * 2 = Got CSN and CC | |
1500 | */ | |
17505ce2 | 1501 | static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) { |
c8dd9b09 | 1502 | static uint8_t act_all[] = { 0x0a }; |
aa53efc3 | 1503 | //static uint8_t identify[] = { 0x0c }; |
1504 | static uint8_t identify[] = { 0x0c, 0x00, 0x73, 0x33 }; | |
c8dd9b09 | 1505 | static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
aa53efc3 | 1506 | static uint8_t readcheck_cc[]= { 0x88, 0x02 }; |
1507 | if (use_credit_key) | |
1508 | readcheck_cc[0] = 0x18; | |
1509 | else | |
1510 | readcheck_cc[0] = 0x88; | |
caaf9618 | 1511 | |
f71f4deb | 1512 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
c8dd9b09 MHS |
1513 | |
1514 | uint8_t read_status = 0; | |
1515 | ||
1516 | // Send act_all | |
1517 | ReaderTransmitIClass(act_all, 1); | |
1518 | // Card present? | |
17505ce2 | 1519 | if (!ReaderReceiveIClass(resp)) return read_status;//Fail |
c8dd9b09 MHS |
1520 | //Send Identify |
1521 | ReaderTransmitIClass(identify, 1); | |
1522 | //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC | |
17505ce2 | 1523 | uint8_t len = ReaderReceiveIClass(resp); |
1524 | if (len != 10) return read_status;//Fail | |
c8dd9b09 MHS |
1525 | |
1526 | //Copy the Anti-collision CSN to our select-packet | |
17505ce2 | 1527 | memcpy(&select[1], resp, 8); |
c8dd9b09 MHS |
1528 | //Select the card |
1529 | ReaderTransmitIClass(select, sizeof(select)); | |
1530 | //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC | |
17505ce2 | 1531 | len = ReaderReceiveIClass(resp); |
1532 | if (len != 10) return read_status;//Fail | |
c8dd9b09 MHS |
1533 | |
1534 | //Success - level 1, we got CSN | |
1535 | //Save CSN in response data | |
17505ce2 | 1536 | memcpy(card_data, resp, 8); |
c8dd9b09 MHS |
1537 | |
1538 | //Flag that we got to at least stage 1, read CSN | |
1539 | read_status = 1; | |
1540 | ||
34e2af02 | 1541 | // Card selected, now read e-purse (cc) (only 8 bytes no CRC) |
c8dd9b09 | 1542 | ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc)); |
17505ce2 | 1543 | if (ReaderReceiveIClass(resp) == 8) { |
c8dd9b09 | 1544 | //Save CC (e-purse) in response data |
17505ce2 | 1545 | memcpy(card_data+8, resp, 8); |
caaf9618 | 1546 | read_status++; |
c8dd9b09 MHS |
1547 | } |
1548 | ||
1549 | return read_status; | |
1550 | } | |
17505ce2 | 1551 | |
1552 | static uint8_t handshakeIclassTag(uint8_t *card_data) { | |
aa53efc3 | 1553 | return handshakeIclassTag_ext(card_data, false); |
1554 | } | |
c8dd9b09 | 1555 | |
caaf9618 | 1556 | |
1e262141 | 1557 | // Reader iClass Anticollission |
1558 | void ReaderIClass(uint8_t arg0) { | |
1e262141 | 1559 | |
17505ce2 | 1560 | uint8_t card_data[6 * 8] = {0}; |
83602aff | 1561 | memset(card_data, 0xFF, sizeof(card_data)); |
17505ce2 | 1562 | uint8_t last_csn[8] = {0,0,0,0,0,0,0,0}; |
34e2af02 | 1563 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
1564 | memset(resp, 0xFF, sizeof(resp)); | |
caaf9618 | 1565 | //Read conf block CRC(0x01) => 0xfa 0x22 |
17505ce2 | 1566 | uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22}; |
34e2af02 | 1567 | //Read App Issuer Area block CRC(0x05) => 0xde 0x64 |
17505ce2 | 1568 | uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64}; |
caaf9618 | 1569 | |
6ce0e538 | 1570 | int read_status= 0; |
caaf9618 | 1571 | uint8_t result_status = 0; |
34e2af02 | 1572 | // flag to read until one tag is found successfully |
6ce0e538 | 1573 | bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE; |
34e2af02 | 1574 | // flag to only try 5 times to find one tag then return |
6ce0e538 | 1575 | bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY; |
34e2af02 | 1576 | // if neither abort_after_read nor try_once then continue reading until button pressed. |
1577 | ||
1578 | bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY; | |
1579 | // test flags for what blocks to be sure to read | |
1580 | uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF; | |
1581 | uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC; | |
1582 | uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA; | |
1583 | ||
1584 | set_tracing(true); | |
6ce0e538 | 1585 | setupIclassReader(); |
1e262141 | 1586 | |
17505ce2 | 1587 | uint16_t tryCnt = 0; |
979c7655 | 1588 | bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); |
17505ce2 | 1589 | while (!userCancelled) { |
979c7655 | 1590 | // if only looking for one card try 2 times if we missed it the first time |
17505ce2 | 1591 | if (try_once && tryCnt > 2) { |
1592 | break; | |
1593 | } | |
6ce0e538 | 1594 | tryCnt++; |
17505ce2 | 1595 | if (!get_tracing()) { |
c8dd9b09 MHS |
1596 | DbpString("Trace full"); |
1597 | break; | |
1598 | } | |
1599 | WDT_HIT(); | |
4ab4336a | 1600 | |
aa53efc3 | 1601 | read_status = handshakeIclassTag_ext(card_data, use_credit_key); |
2e9d4b3f | 1602 | |
17505ce2 | 1603 | if (read_status == 0) continue; |
1604 | if (read_status == 1) result_status = FLAG_ICLASS_READER_CSN; | |
1605 | if (read_status == 2) result_status = FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CC; | |
caaf9618 MHS |
1606 | |
1607 | // handshakeIclass returns CSN|CC, but the actual block | |
1608 | // layout is CSN|CONFIG|CC, so here we reorder the data, | |
1609 | // moving CC forward 8 bytes | |
17505ce2 | 1610 | memcpy(card_data+16, card_data+8, 8); |
caaf9618 | 1611 | //Read block 1, config |
17505ce2 | 1612 | if (flagReadConfig) { |
1613 | if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10)) { | |
caaf9618 | 1614 | result_status |= FLAG_ICLASS_READER_CONF; |
34e2af02 | 1615 | memcpy(card_data+8, resp, 8); |
aa53efc3 | 1616 | } else { |
1617 | Dbprintf("Failed to dump config block"); | |
caaf9618 MHS |
1618 | } |
1619 | } | |
c8dd9b09 | 1620 | |
caaf9618 | 1621 | //Read block 5, AA |
17505ce2 | 1622 | if (flagReadAA) { |
1623 | if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) { | |
caaf9618 | 1624 | result_status |= FLAG_ICLASS_READER_AA; |
17505ce2 | 1625 | memcpy(card_data + (8*5), resp, 8); |
aa53efc3 | 1626 | } else { |
1627 | //Dbprintf("Failed to dump AA block"); | |
caaf9618 MHS |
1628 | } |
1629 | } | |
1630 | ||
1631 | // 0 : CSN | |
b67f7ec3 | 1632 | // 1 : Configuration |
caaf9618 | 1633 | // 2 : e-purse |
0ab9002f | 1634 | // 3 : kd / debit / aa2 (write-only) |
1635 | // 4 : kc / credit / aa1 (write-only) | |
1636 | // 5 : AIA, Application issuer area | |
1637 | //Then we can 'ship' back the 6 * 8 bytes of data, | |
b67f7ec3 MHS |
1638 | // with 0xFF:s in block 3 and 4. |
1639 | ||
c8dd9b09 | 1640 | LED_B_ON(); |
17505ce2 | 1641 | //Send back to client, but don't bother if we already sent this - |
979c7655 | 1642 | // only useful if looping in arm (not try_once && not abort_after_read) |
17505ce2 | 1643 | if (memcmp(last_csn, card_data, 8) != 0) { |
34e2af02 | 1644 | // If caller requires that we get Conf, CC, AA, continue until we got it |
17505ce2 | 1645 | if ( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) { |
1646 | cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data)); | |
1647 | if (abort_after_read) { | |
c8dd9b09 | 1648 | LED_A_OFF(); |
979c7655 | 1649 | LED_B_OFF(); |
c8dd9b09 MHS |
1650 | return; |
1651 | } | |
1652 | //Save that we already sent this.... | |
1653 | memcpy(last_csn, card_data, 8); | |
1654 | } | |
caaf9618 | 1655 | |
c8dd9b09 MHS |
1656 | } |
1657 | LED_B_OFF(); | |
979c7655 | 1658 | userCancelled = BUTTON_PRESS() || usb_poll_validate_length(); |
1659 | } | |
1660 | if (userCancelled) { | |
17505ce2 | 1661 | cmd_send(CMD_ACK, 0xFF, 0, 0, card_data, 0); |
979c7655 | 1662 | } else { |
17505ce2 | 1663 | cmd_send(CMD_ACK, 0, 0, 0, card_data, 0); |
6ce0e538 | 1664 | } |
3ac22ee1 | 1665 | LED_A_OFF(); |
cee5a30d | 1666 | } |
1667 | ||
c3963755 | 1668 | void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) { |
c8dd9b09 | 1669 | |
cb29e00a | 1670 | uint8_t card_data[USB_CMD_DATA_SIZE]={0}; |
39d3ce5d MHS |
1671 | uint16_t block_crc_LUT[255] = {0}; |
1672 | ||
17505ce2 | 1673 | //Generate a lookup table for block crc |
1674 | for (int block = 0; block < 255; block++){ | |
1675 | char bl = block; | |
1676 | block_crc_LUT[block] = iclass_crc16(&bl ,1); | |
39d3ce5d MHS |
1677 | } |
1678 | //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]); | |
c8dd9b09 | 1679 | |
c3963755 | 1680 | uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
1681 | uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 }; | |
17505ce2 | 1682 | |
1683 | uint16_t crc = 0; | |
1684 | uint8_t cardsize = 0; | |
1685 | uint8_t mem = 0; | |
1686 | ||
1687 | static struct memory_t { | |
1688 | int k16; | |
1689 | int book; | |
1690 | int k2; | |
1691 | int lockauth; | |
1692 | int keyaccess; | |
c3963755 | 1693 | } memory; |
17505ce2 | 1694 | |
f71f4deb | 1695 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
17505ce2 | 1696 | |
1697 | setupIclassReader(); | |
44964fd1 | 1698 | set_tracing(true); |
c3963755 | 1699 | |
17505ce2 | 1700 | while (!BUTTON_PRESS()) { |
1701 | ||
39d3ce5d MHS |
1702 | WDT_HIT(); |
1703 | ||
17505ce2 | 1704 | if (!get_tracing()) { |
c3963755 | 1705 | DbpString("Trace full"); |
1706 | break; | |
1707 | } | |
17505ce2 | 1708 | |
c8dd9b09 | 1709 | uint8_t read_status = handshakeIclassTag(card_data); |
17505ce2 | 1710 | if (read_status < 2) continue; |
c8dd9b09 MHS |
1711 | |
1712 | //for now replay captured auth (as cc not updated) | |
17505ce2 | 1713 | memcpy(check+5, MAC, 4); |
c8dd9b09 | 1714 | |
17505ce2 | 1715 | if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 5)) { |
c8dd9b09 MHS |
1716 | Dbprintf("Error: Authentication Fail!"); |
1717 | continue; | |
1718 | } | |
1719 | ||
39d3ce5d MHS |
1720 | //first get configuration block (block 1) |
1721 | crc = block_crc_LUT[1]; | |
17505ce2 | 1722 | read[1] = 1; |
c8dd9b09 MHS |
1723 | read[2] = crc >> 8; |
1724 | read[3] = crc & 0xff; | |
1725 | ||
17505ce2 | 1726 | if (!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) { |
39d3ce5d | 1727 | Dbprintf("Dump config (block 1) failed"); |
c8dd9b09 MHS |
1728 | continue; |
1729 | } | |
1730 | ||
17505ce2 | 1731 | mem = resp[5]; |
1732 | memory.k16 = (mem & 0x80); | |
1733 | memory.book = (mem & 0x20); | |
1734 | memory.k2 = (mem & 0x8); | |
1735 | memory.lockauth = (mem & 0x2); | |
1736 | memory.keyaccess = (mem & 0x1); | |
c8dd9b09 MHS |
1737 | |
1738 | cardsize = memory.k16 ? 255 : 32; | |
1739 | WDT_HIT(); | |
cb29e00a | 1740 | //Set card_data to all zeroes, we'll fill it with data |
17505ce2 | 1741 | memset(card_data, 0x0, USB_CMD_DATA_SIZE); |
1742 | uint8_t failedRead = 0; | |
1743 | uint32_t stored_data_length = 0; | |
c8dd9b09 | 1744 | //then loop around remaining blocks |
17505ce2 | 1745 | for (int block = 0; block < cardsize; block++) { |
1746 | read[1] = block; | |
39d3ce5d | 1747 | crc = block_crc_LUT[block]; |
c8dd9b09 MHS |
1748 | read[2] = crc >> 8; |
1749 | read[3] = crc & 0xff; | |
1750 | ||
17505ce2 | 1751 | if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) { |
c8dd9b09 | 1752 | Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x", |
17505ce2 | 1753 | block, resp[0], resp[1], resp[2], |
c8dd9b09 MHS |
1754 | resp[3], resp[4], resp[5], |
1755 | resp[6], resp[7]); | |
1756 | ||
cb29e00a | 1757 | //Fill up the buffer |
17505ce2 | 1758 | memcpy(card_data+stored_data_length, resp, 8); |
cb29e00a | 1759 | stored_data_length += 8; |
17505ce2 | 1760 | if (stored_data_length +8 > USB_CMD_DATA_SIZE) { |
1761 | //Time to send this off and start afresh | |
cb29e00a MHS |
1762 | cmd_send(CMD_ACK, |
1763 | stored_data_length,//data length | |
1764 | failedRead,//Failed blocks? | |
1765 | 0,//Not used ATM | |
1766 | card_data, stored_data_length); | |
1767 | //reset | |
1768 | stored_data_length = 0; | |
1769 | failedRead = 0; | |
1770 | } | |
1771 | ||
17505ce2 | 1772 | } else { |
cb29e00a | 1773 | failedRead = 1; |
17505ce2 | 1774 | stored_data_length += 8;//Otherwise, data becomes misaligned |
c8dd9b09 | 1775 | Dbprintf("Failed to dump block %d", block); |
c3963755 | 1776 | } |
1777 | } | |
428d6221 | 1778 | |
cb29e00a | 1779 | //Send off any remaining data |
17505ce2 | 1780 | if (stored_data_length > 0) { |
cb29e00a MHS |
1781 | cmd_send(CMD_ACK, |
1782 | stored_data_length,//data length | |
1783 | failedRead,//Failed blocks? | |
1784 | 0,//Not used ATM | |
17505ce2 | 1785 | card_data, |
1786 | stored_data_length); | |
cb29e00a | 1787 | } |
c8dd9b09 MHS |
1788 | //If we got here, let's break |
1789 | break; | |
c3963755 | 1790 | } |
cb29e00a MHS |
1791 | //Signal end of transmission |
1792 | cmd_send(CMD_ACK, | |
1793 | 0,//data length | |
1794 | 0,//Failed blocks? | |
1795 | 0,//Not used ATM | |
17505ce2 | 1796 | card_data, |
1797 | 0); | |
cb29e00a | 1798 | |
c3963755 | 1799 | LED_A_OFF(); |
1800 | } | |
1801 | ||
17505ce2 | 1802 | void iClass_ReadCheck(uint8_t blockNo, uint8_t keyType) { |
3ac22ee1 | 1803 | uint8_t readcheck[] = { keyType, blockNo }; |
1804 | uint8_t resp[] = {0,0,0,0,0,0,0,0}; | |
1805 | size_t isOK = 0; | |
1806 | isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 6); | |
17505ce2 | 1807 | cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); |
3ac22ee1 | 1808 | } |
1809 | ||
aa53efc3 | 1810 | void iClass_Authentication(uint8_t *MAC) { |
8ddb81a2 | 1811 | uint8_t check[] = { ICLASS_CMD_CHECK_KD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
aa53efc3 | 1812 | uint8_t resp[ICLASS_BUFFER_SIZE]; |
17505ce2 | 1813 | memcpy(check+5, MAC, 4); |
aa53efc3 | 1814 | bool isOK; |
3ac22ee1 | 1815 | isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6); |
17505ce2 | 1816 | cmd_send(CMD_ACK,isOK, 0, 0, 0, 0); |
aa53efc3 | 1817 | } |
17505ce2 | 1818 | |
3ac22ee1 | 1819 | bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) { |
1820 | uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C? | |
1821 | char bl = blockNo; | |
1822 | uint16_t rdCrc = iclass_crc16(&bl, 1); | |
1823 | readcmd[2] = rdCrc >> 8; | |
1824 | readcmd[3] = rdCrc & 0xff; | |
1825 | uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; | |
1826 | bool isOK = false; | |
912a3e94 | 1827 | |
3ac22ee1 | 1828 | //readcmd[1] = blockNo; |
1829 | isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10); | |
1830 | memcpy(readdata, resp, sizeof(resp)); | |
fecd8202 | 1831 | |
aa53efc3 | 1832 | return isOK; |
1833 | } | |
fecd8202 | 1834 | |
3ac22ee1 | 1835 | void iClass_ReadBlk(uint8_t blockno) { |
1836 | uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; | |
aa53efc3 | 1837 | bool isOK = false; |
3ac22ee1 | 1838 | isOK = iClass_ReadBlock(blockno, readblockdata); |
1839 | cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8); | |
aa53efc3 | 1840 | } |
fecd8202 | 1841 | |
3ac22ee1 | 1842 | void iClass_Dump(uint8_t blockno, uint8_t numblks) { |
1843 | uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0}; | |
aa53efc3 | 1844 | bool isOK = false; |
1845 | uint8_t blkCnt = 0; | |
fecd8202 | 1846 | |
aa53efc3 | 1847 | BigBuf_free(); |
1848 | uint8_t *dataout = BigBuf_malloc(255*8); | |
17505ce2 | 1849 | if (dataout == NULL) { |
aa53efc3 | 1850 | Dbprintf("out of memory"); |
b8dd1ef6 | 1851 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
1852 | LED_D_OFF(); | |
17505ce2 | 1853 | cmd_send(CMD_ACK, 0, 1, 0, 0, 0); |
b8dd1ef6 | 1854 | LED_A_OFF(); |
aa53efc3 | 1855 | return; |
1856 | } | |
17505ce2 | 1857 | memset(dataout, 0xFF, 255*8); |
fecd8202 | 1858 | |
17505ce2 | 1859 | for ( ; blkCnt < numblks; blkCnt++) { |
3ac22ee1 | 1860 | isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); |
1861 | if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again | |
1862 | isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata); | |
aa53efc3 | 1863 | if (!isOK) { |
1864 | Dbprintf("Block %02X failed to read", blkCnt+blockno); | |
1865 | break; | |
1866 | } | |
fecd8202 | 1867 | } |
17505ce2 | 1868 | memcpy(dataout + (blkCnt*8), readblockdata, 8); |
aa53efc3 | 1869 | } |
1870 | //return pointer to dump memory in arg3 | |
17505ce2 | 1871 | cmd_send(CMD_ACK, isOK, blkCnt, BigBuf_max_traceLen(), 0, 0); |
aa53efc3 | 1872 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
1873 | LEDsoff(); | |
1874 | BigBuf_free(); | |
1875 | } | |
1876 | ||
17505ce2 | 1877 | static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) { |
671ff89f | 1878 | uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
3ac22ee1 | 1879 | //uint8_t readblockdata[10]; |
1880 | //write[1] = blockNo; | |
aa53efc3 | 1881 | memcpy(write+2, data, 12); // data + mac |
17505ce2 | 1882 | char *wrCmd = (char *)(write+1); |
671ff89f | 1883 | uint16_t wrCrc = iclass_crc16(wrCmd, 13); |
1884 | write[14] = wrCrc >> 8; | |
1885 | write[15] = wrCrc & 0xff; | |
3ac22ee1 | 1886 | uint8_t resp[] = {0,0,0,0,0,0,0,0,0,0}; |
671ff89f | 1887 | bool isOK = false; |
1888 | ||
17505ce2 | 1889 | isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); |
671ff89f | 1890 | if (isOK) { //if reader responded correctly |
3ac22ee1 | 1891 | //Dbprintf("WriteResp: %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",resp[0],resp[1],resp[2],resp[3],resp[4],resp[5],resp[6],resp[7],resp[8],resp[9]); |
17505ce2 | 1892 | if (memcmp(write+2, resp, 8)) { //if response is not equal to write values |
671ff89f | 1893 | if (blockNo != 3 && blockNo != 4) { //if not programming key areas (note key blocks don't get programmed with actual key data it is xor data) |
1894 | //error try again | |
17505ce2 | 1895 | isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10); |
1896 | } | |
fecd8202 | 1897 | } |
fecd8202 | 1898 | } |
aa53efc3 | 1899 | return isOK; |
1900 | } | |
1901 | ||
3ac22ee1 | 1902 | void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) { |
1903 | bool isOK = iClass_WriteBlock_ext(blockNo, data); | |
aa53efc3 | 1904 | if (isOK){ |
17505ce2 | 1905 | Dbprintf("Write block [%02x] successful", blockNo); |
aa53efc3 | 1906 | } else { |
17505ce2 | 1907 | Dbprintf("Write block [%02x] failed", blockNo); |
aa53efc3 | 1908 | } |
17505ce2 | 1909 | cmd_send(CMD_ACK, isOK, 0, 0, 0, 0); |
aa53efc3 | 1910 | } |
1911 | ||
3ac22ee1 | 1912 | void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) { |
aa53efc3 | 1913 | int i; |
1914 | int written = 0; | |
1915 | int total_block = (endblock - startblock) + 1; | |
17505ce2 | 1916 | for (i = 0; i < total_block; i++) { |
aa53efc3 | 1917 | // block number |
17505ce2 | 1918 | if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ |
1919 | Dbprintf("Write block [%02x] successful", i + startblock); | |
aa53efc3 | 1920 | written++; |
1921 | } else { | |
17505ce2 | 1922 | if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){ |
1923 | Dbprintf("Write block [%02x] successful", i + startblock); | |
aa53efc3 | 1924 | written++; |
1925 | } else { | |
17505ce2 | 1926 | Dbprintf("Write block [%02x] failed", i + startblock); |
aa53efc3 | 1927 | } |
1928 | } | |
1929 | } | |
1930 | if (written == total_block) | |
1931 | Dbprintf("Clone complete"); | |
1932 | else | |
17505ce2 | 1933 | Dbprintf("Clone incomplete"); |
aa53efc3 | 1934 | |
17505ce2 | 1935 | cmd_send(CMD_ACK, 1, 0, 0, 0, 0); |
aa53efc3 | 1936 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
1937 | LEDsoff(); | |
1938 | } |