1 //-----------------------------------------------------------------------------
2 // Gerhard de Koning Gans - May 2008
3 // Hagen Fritsch - June 2010
4 // Gerhard de Koning Gans - May 2011
5 // Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation
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
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
16 // Please feel free to contribute and extend iClass support!!
17 //-----------------------------------------------------------------------------
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:
24 // + 22279: : 0c 03 e8 01
26 // ...with an incorrect answer...
28 // + 85: 0: TAG ff! ff! ff! ff! ff! ff! ff! ff! bb 33 bb 00 01! 0e! 04! bb !crc
30 // We still left the error signalling bytes in the traces like 0xbb
32 // A correct trace should look like this:
34 // + 21112: : 0c 03 e8 01
35 // + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5
37 //-----------------------------------------------------------------------------
41 #include "proxmark3.h"
48 #include "iso14443a.h"
50 // Needed for CRC in emulation mode;
51 // same construction as in ISO 14443;
52 // different initial value (CRC_ICLASS)
53 #include "iso14443crc.h"
54 #include "iso15693tools.h"
55 #include "protocols.h"
56 #include "optimized_cipher.h"
57 #include "usb_cdc.h" // for usb_poll_validate_length
58 #include "fpgaloader.h"
60 static int timeout
= 4096;
62 //-----------------------------------------------------------------------------
63 // The software UART that receives commands from the reader, and its state
65 //-----------------------------------------------------------------------------
69 STATE_START_OF_COMMUNICATION
,
89 static RAMFUNC
int OutOfNDecoding(int bit
) {
93 if (!Uart
.bitBuffer
) {
94 Uart
.bitBuffer
= bit
^ 0xFF0;
98 Uart
.bitBuffer
^= bit
;
101 /*if (Uart.swapper) {
102 Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
105 if (Uart.byteCnt > 15) { return true; }
111 if (Uart
.state
!= STATE_UNSYNCD
) {
114 if ((Uart
.bitBuffer
& Uart
.syncBit
) ^ Uart
.syncBit
) {
119 if (((Uart
.bitBuffer
<< 1) & Uart
.syncBit
) ^ Uart
.syncBit
) {
124 if (bit
!= bitright
) {
129 // So, now we only have to deal with *bit*, lets see...
130 if (Uart
.posCnt
== 1) {
131 // measurement first half bitperiod
133 // Drop in first half means that we are either seeing
136 if (Uart
.nOutOfCnt
== 1) {
137 // End of Communication
138 Uart
.state
= STATE_UNSYNCD
;
140 if (Uart
.byteCnt
== 0) {
141 // Its not straightforward to show single EOFs
142 // So just leave it and do not return true
143 Uart
.output
[0] = 0xf0;
148 } else if (Uart
.state
!= STATE_START_OF_COMMUNICATION
) {
149 // When not part of SOF or EOF, it is an error
150 Uart
.state
= STATE_UNSYNCD
;
156 // measurement second half bitperiod
157 // Count the bitslot we are in... (ISO 15693)
161 if (Uart
.dropPosition
) {
162 if (Uart
.state
== STATE_START_OF_COMMUNICATION
) {
167 // It is an error if we already have seen a drop in current frame
168 Uart
.state
= STATE_UNSYNCD
;
171 Uart
.dropPosition
= Uart
.nOutOfCnt
;
178 if (Uart
.nOutOfCnt
== Uart
.OutOfCnt
&& Uart
.OutOfCnt
== 4) {
181 if (Uart
.state
== STATE_START_OF_COMMUNICATION
) {
182 if (Uart
.dropPosition
== 4) {
183 Uart
.state
= STATE_RECEIVING
;
185 } else if (Uart
.dropPosition
== 3) {
186 Uart
.state
= STATE_RECEIVING
;
188 //Uart.output[Uart.byteCnt] = 0xdd;
191 Uart
.state
= STATE_UNSYNCD
;
194 Uart
.dropPosition
= 0;
198 if (!Uart
.dropPosition
) {
199 Uart
.state
= STATE_UNSYNCD
;
207 //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; }
208 //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; }
210 Uart
.shiftReg
^= ((Uart
.dropPosition
& 0x03) << 6);
212 Uart
.dropPosition
= 0;
214 if (Uart
.bitCnt
== 8) {
215 Uart
.output
[Uart
.byteCnt
] = (Uart
.shiftReg
& 0xff);
222 } else if (Uart
.nOutOfCnt
== Uart
.OutOfCnt
) {
225 if (!Uart
.dropPosition
) {
226 Uart
.state
= STATE_UNSYNCD
;
231 Uart
.output
[Uart
.byteCnt
] = (Uart
.dropPosition
& 0xff);
236 Uart
.dropPosition
= 0;
241 Uart.output[Uart.byteCnt] = 0xAA;
243 Uart.output[Uart.byteCnt] = error & 0xFF;
245 Uart.output[Uart.byteCnt] = 0xAA;
247 Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF;
249 Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
251 Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF;
253 Uart.output[Uart.byteCnt] = 0xAA;
260 bit
= Uart
.bitBuffer
& 0xf0;
262 bit
^= 0x0F; // drops become 1s ;-)
264 // should have been high or at least (4 * 128) / fc
265 // according to ISO this should be at least (9 * 128 + 20) / fc
266 if (Uart
.highCnt
== 8) {
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;
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)) {
281 // the first half bit period is expected in next sample
285 } else if (bit
& 1) { Uart
.syncBit
= bit
& 1; Uart
.samples
= 0; }
288 Uart
.state
= STATE_START_OF_COMMUNICATION
;
292 Uart
.OutOfCnt
= 4; // Start at 1/4, could switch to 1/256
293 Uart
.dropPosition
= 0;
299 } else if (Uart
.highCnt
< 8) {
308 //=============================================================================
310 //=============================================================================
315 DEMOD_START_OF_COMMUNICATION
,
316 DEMOD_START_OF_COMMUNICATION2
,
317 DEMOD_START_OF_COMMUNICATION3
,
321 DEMOD_END_OF_COMMUNICATION
,
322 DEMOD_END_OF_COMMUNICATION2
,
345 static RAMFUNC
int ManchesterDecoding(int v
) {
351 Demod
.buffer
= Demod
.buffer2
;
352 Demod
.buffer2
= Demod
.buffer3
;
355 if (Demod
.buff
< 3) {
360 if (Demod
.state
==DEMOD_UNSYNCD
) {
361 Demod
.output
[Demod
.len
] = 0xfa;
364 Demod
.posCount
= 1; // This is the first half bit period, so after syncing handle the second part
367 Demod
.syncBit
= 0x08;
374 Demod
.syncBit
= 0x04;
381 Demod
.syncBit
= 0x02;
384 if (bit
& 0x01 && Demod
.syncBit
) {
385 Demod
.syncBit
= 0x01;
390 Demod
.state
= DEMOD_START_OF_COMMUNICATION
;
391 Demod
.sub
= SUB_FIRST_HALF
;
395 if (Demod
.posCount
) {
396 switch (Demod
.syncBit
) {
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;
402 // SOF must be long burst... otherwise stay unsynced!!!
403 if (!(Demod
.buffer
& Demod
.syncBit
) || !(Demod
.buffer2
& Demod
.syncBit
)) {
404 Demod
.state
= DEMOD_UNSYNCD
;
407 // SOF must be long burst... otherwise stay unsynced!!!
408 if (!(Demod
.buffer2
& Demod
.syncBit
) || !(Demod
.buffer3
& Demod
.syncBit
)) {
409 Demod
.state
= DEMOD_UNSYNCD
;
418 // state is DEMOD is in SYNC from here on.
419 modulation
= bit
& Demod
.syncBit
;
420 modulation
|= ((bit
<< 1) ^ ((Demod
.buffer
& 0x08) >> 3)) & Demod
.syncBit
;
424 if (Demod
.posCount
== 0) {
427 Demod
.sub
= SUB_FIRST_HALF
;
429 Demod
.sub
= SUB_NONE
;
434 if (Demod
.sub
== SUB_FIRST_HALF
) {
435 Demod
.sub
= SUB_BOTH
;
437 Demod
.sub
= SUB_SECOND_HALF
;
439 } else if (Demod
.sub
== SUB_NONE
) {
440 if (Demod
.state
== DEMOD_SOF_COMPLETE
) {
441 Demod
.output
[Demod
.len
] = 0x0f;
443 Demod
.state
= DEMOD_UNSYNCD
;
446 Demod
.state
= DEMOD_ERROR_WAIT
;
451 switch(Demod
.state
) {
452 case DEMOD_START_OF_COMMUNICATION
:
453 if (Demod
.sub
== SUB_BOTH
) {
454 Demod
.state
= DEMOD_START_OF_COMMUNICATION2
;
456 Demod
.sub
= SUB_NONE
;
458 Demod
.output
[Demod
.len
] = 0xab;
459 Demod
.state
= DEMOD_ERROR_WAIT
;
463 case DEMOD_START_OF_COMMUNICATION2
:
464 if (Demod
.sub
== SUB_SECOND_HALF
) {
465 Demod
.state
= DEMOD_START_OF_COMMUNICATION3
;
467 Demod
.output
[Demod
.len
] = 0xab;
468 Demod
.state
= DEMOD_ERROR_WAIT
;
472 case DEMOD_START_OF_COMMUNICATION3
:
473 if (Demod
.sub
== SUB_SECOND_HALF
) {
474 Demod
.state
= DEMOD_SOF_COMPLETE
;
476 Demod
.output
[Demod
.len
] = 0xab;
477 Demod
.state
= DEMOD_ERROR_WAIT
;
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)
486 if (Demod
.sub
== SUB_SECOND_HALF
) { // SUB_FIRST_HALF
488 Demod
.shiftReg
= (Demod
.shiftReg
>> 1) ^ 0x100;
489 Demod
.state
= DEMOD_MANCHESTER_D
;
490 } else if (Demod
.sub
== SUB_FIRST_HALF
) { // SUB_SECOND_HALF
492 Demod
.shiftReg
>>= 1;
493 Demod
.state
= DEMOD_MANCHESTER_E
;
494 } else if (Demod
.sub
== SUB_BOTH
) {
495 Demod
.state
= DEMOD_MANCHESTER_F
;
497 Demod
.state
= DEMOD_ERROR_WAIT
;
502 case DEMOD_MANCHESTER_F
:
503 // Tag response does not need to be a complete byte!
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
507 Demod
.output
[Demod
.len
] = Demod
.shiftReg
& 0xff;
511 Demod
.state
= DEMOD_UNSYNCD
;
514 Demod
.output
[Demod
.len
] = 0xad;
515 Demod
.state
= DEMOD_ERROR_WAIT
;
520 case DEMOD_ERROR_WAIT
:
521 Demod
.state
= DEMOD_UNSYNCD
;
525 Demod
.output
[Demod
.len
] = 0xdd;
526 Demod
.state
= DEMOD_UNSYNCD
;
530 if (Demod
.bitCount
>= 8) {
531 Demod
.shiftReg
>>= 1;
532 Demod
.output
[Demod
.len
] = (Demod
.shiftReg
& 0xff);
539 Demod
.output
[Demod
.len
] = 0xBB;
541 Demod
.output
[Demod
.len
] = error
& 0xFF;
543 Demod
.output
[Demod
.len
] = 0xBB;
545 Demod
.output
[Demod
.len
] = bit
& 0xFF;
547 Demod
.output
[Demod
.len
] = Demod
.buffer
& 0xFF;
550 Demod
.output
[Demod
.len
] = Demod
.buffer2
& 0xFF;
552 Demod
.output
[Demod
.len
] = Demod
.syncBit
& 0xFF;
554 Demod
.output
[Demod
.len
] = 0xBB;
561 } // end (state != UNSYNCED)
566 //=============================================================================
567 // Finally, a `sniffer' for iClass communication
568 // Both sides of communication!
569 //=============================================================================
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
575 //-----------------------------------------------------------------------------
576 void RAMFUNC
SnoopIClass(void) {
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
583 // The command (reader -> tag) that we're receiving.
584 // The length of a received command will in most cases be no more than 18 bytes.
585 // So 32 should be enough!
586 #define ICLASS_BUFFER_SIZE 32
587 uint8_t readerToTagCmd
[ICLASS_BUFFER_SIZE
];
588 // The response (tag -> reader) that we're receiving.
589 uint8_t tagToReaderResponse
[ICLASS_BUFFER_SIZE
];
591 FpgaDownloadAndGo(FPGA_BITSTREAM_HF
);
593 // free all BigBuf memory
595 // The DMA buffer, used to stream samples from the FPGA
596 uint8_t *dmaBuf
= BigBuf_malloc(DMA_BUFFER_SIZE
);
600 iso14a_set_trigger(false);
607 // Count of samples received so far, so that we can include timing
608 // information in the trace buffer.
612 // Set up the demodulator for tag -> reader responses.
613 Demod
.output
= tagToReaderResponse
;
615 Demod
.state
= DEMOD_UNSYNCD
;
617 // Setup for the DMA.
618 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A
);
620 lastRxCounter
= DMA_BUFFER_SIZE
;
621 FpgaSetupSscDma((uint8_t *)dmaBuf
, DMA_BUFFER_SIZE
);
623 // And the reader -> tag commands
624 memset(&Uart
, 0, sizeof(Uart
));
625 Uart
.output
= readerToTagCmd
;
626 Uart
.byteCntMax
= 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
627 Uart
.state
= STATE_UNSYNCD
;
629 // And put the FPGA in the appropriate mode
630 // Signal field is off with the appropriate LED
632 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A
| FPGA_HF_ISO14443A_SNIFFER
);
633 SetAdcMuxFor(GPIO_MUXSEL_HIPKD
);
635 uint32_t time_0
= GetCountSspClk();
636 uint32_t time_start
= 0;
637 uint32_t time_stop
= 0;
644 // And now we loop, receiving samples.
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
);
656 if (behindBy
< 1) continue;
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
;
673 decbyte
^= (1 << (3 - div
));
676 // FOR READER SIDE COMMUMICATION...
679 decbyter
^= (smpl
& 0x30);
683 if ((div
+ 1) % 2 == 0) {
685 if (OutOfNDecoding((smpl
& 0xF0) >> 4)) {
686 rsamples
= samples
- Uart
.samples
;
687 time_stop
= (GetCountSspClk()-time_0
) << 4;
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);
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
;
704 time_start
= (GetCountSspClk()-time_0
) << 4;
711 if (ManchesterDecoding(smpl
& 0x0F)) {
712 time_stop
= (GetCountSspClk()-time_0
) << 4;
714 rsamples
= samples
- Demod
.samples
;
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);
721 // And ready to receive another response.
722 memset(&Demod
, 0, sizeof(Demod
));
723 Demod
.output
= tagToReaderResponse
;
724 Demod
.state
= DEMOD_UNSYNCD
;
727 time_start
= (GetCountSspClk()-time_0
) << 4;
734 if (BUTTON_PRESS()) {
735 DbpString("cancelled_a");
740 DbpString("COMMAND FINISHED");
742 Dbprintf("%x %x %x", maxBehindBy
, Uart
.state
, Uart
.byteCnt
);
743 Dbprintf("%x %x %x", Uart
.byteCntMax
, BigBuf_get_traceLen(), (int)Uart
.output
[0]);
746 AT91C_BASE_PDC_SSC
->PDC_PTCR
= AT91C_PDC_RXTDIS
;
747 Dbprintf("%x %x %x", maxBehindBy
, Uart
.state
, Uart
.byteCnt
);
748 Dbprintf("%x %x %x", Uart
.byteCntMax
, BigBuf_get_traceLen(), (int)Uart
.output
[0]);
752 void rotateCSN(uint8_t* originalCSN
, uint8_t* rotatedCSN
) {
754 for (i
= 0; i
< 8; i
++) {
755 rotatedCSN
[i
] = (originalCSN
[i
] >> 3) | (originalCSN
[(i
+1)%8] << 5);
760 static void CodeIClassTagSOF() {
761 //So far a dummy implementation, not used
762 //int lastProxToAirDuration =0;
766 ToSend
[++ToSendMax
] = 0x1D;
767 // lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
769 // Convert from last byte pos to length
773 static void AppendCrc(uint8_t *data
, int len
) {
774 ComputeCrc14443(CRC_ICLASS
, data
, len
, data
+len
, data
+len
+1);
779 * @brief Does the actual simulation
780 * @param csn - csn to use
781 * @param breakAfterMacReceived if true, returns after reader MAC has been received.
783 int doIClassSimulation(int simulationMode
, uint8_t *reader_mac_buf
) {
785 // free eventually allocated BigBuf memory
786 BigBuf_free_keep_EM();
790 uint8_t *emulator
= BigBuf_get_EM_addr();
791 uint8_t *csn
= emulator
;
792 uint8_t sof_data
[] = { 0x0F } ;
794 // CSN followed by two CRC bytes
795 uint8_t anticoll_data
[10] = { 0 };
796 uint8_t csn_data
[10] = { 0 };
797 memcpy(csn_data
, csn
, sizeof(csn_data
));
798 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]);
800 // Construct anticollision-CSN
801 rotateCSN(csn_data
, anticoll_data
);
803 // Compute CRC on both CSNs
804 AppendCrc(anticoll_data
, 8);
805 AppendCrc(csn_data
, 8);
807 uint8_t diversified_key
[8] = { 0 };
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
) {
812 // The diversified key should be stored on block 3
813 // Get the diversified key from emulator memory
814 memcpy(diversified_key
, emulator
+ (8 * 3), 8);
815 // Card challenge, a.k.a e-purse is on block 2
816 memcpy(card_challenge_data
, emulator
+ (8 * 2), 8);
817 // Precalculate the cipher state, feeding it the CC
818 cipher_state
= opt_doTagMAC_1(card_challenge_data
, diversified_key
);
820 // save card challenge for sim2,4 attack
821 if (reader_mac_buf
!= NULL
) {
822 memcpy(reader_mac_buf
, card_challenge_data
, 8);
830 // Reader 81 anticoll. CSN
833 uint8_t *modulated_response
;
834 int modulated_response_size
= 0;
835 uint8_t *trace_data
= NULL
;
836 int trace_data_size
= 0;
838 // Respond SOF -- takes 1 bytes
839 uint8_t *resp_sof
= BigBuf_malloc(2);
842 // Anticollision CSN (rotated CSN)
843 // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
844 uint8_t *resp_anticoll
= BigBuf_malloc(22);
845 int resp_anticoll_len
;
848 // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
849 uint8_t *resp_csn
= BigBuf_malloc(22);
852 // configuration (block 1) picopass 2ks
853 uint8_t *resp_conf
= BigBuf_malloc(22);
855 uint8_t conf_data
[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00};
856 AppendCrc(conf_data
, 8);
859 // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
860 uint8_t *resp_cc
= BigBuf_malloc(18);
863 // Application Issuer Area (block 5)
864 uint8_t *resp_aia
= BigBuf_malloc(22);
866 uint8_t aia_data
[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
867 AppendCrc(aia_data
, 8);
869 uint8_t *receivedCmd
= BigBuf_malloc(MAX_FRAME_SIZE
);
872 // Prepare card messages
875 // First card answer: SOF only
877 memcpy(resp_sof
, ToSend
, ToSendMax
);
878 resp_sof_Len
= ToSendMax
;
881 CodeIso15693AsTag(anticoll_data
, sizeof(anticoll_data
));
882 memcpy(resp_anticoll
, ToSend
, ToSendMax
);
883 resp_anticoll_len
= ToSendMax
;
886 CodeIso15693AsTag(csn_data
, sizeof(csn_data
));
887 memcpy(resp_csn
, ToSend
, ToSendMax
);
888 resp_csn_len
= ToSendMax
;
890 // Configuration (block 1)
891 CodeIso15693AsTag(conf_data
, sizeof(conf_data
));
892 memcpy(resp_conf
, ToSend
, ToSendMax
);
893 resp_conf_len
= ToSendMax
;
896 CodeIso15693AsTag(card_challenge_data
, sizeof(card_challenge_data
));
897 memcpy(resp_cc
, ToSend
, ToSendMax
);
898 resp_cc_len
= ToSendMax
;
900 // Application Issuer Area (block 5)
901 CodeIso15693AsTag(aia_data
, sizeof(aia_data
));
902 memcpy(resp_aia
, ToSend
, ToSendMax
);
903 resp_aia_len
= ToSendMax
;
905 //This is used for responding to READ-block commands or other data which is dynamically generated
906 uint8_t *data_generic_trace
= BigBuf_malloc(8 + 2); // 8 bytes data + 2byte CRC is max tag answer
907 uint8_t *data_response
= BigBuf_malloc( (8 + 2) * 2 + 2);
910 bool buttonPressed
= false;
915 // Can be used to get a trigger for an oscilloscope..
918 uint32_t reader_eof_time
= 0;
919 len
= GetIso15693CommandFromReader(receivedCmd
, MAX_FRAME_SIZE
, &reader_eof_time
);
921 buttonPressed
= true;
928 // Now look at the reader command and provide appropriate responses
929 // default is no response:
930 modulated_response
= NULL
;
931 modulated_response_size
= 0;
934 if (receivedCmd
[0] == ICLASS_CMD_ACTALL
) {
935 // Reader in anticollission phase
936 modulated_response
= resp_sof
;
937 modulated_response_size
= resp_sof_Len
;
938 trace_data
= sof_data
;
939 trace_data_size
= sizeof(sof_data
);
941 } else if (receivedCmd
[0] == ICLASS_CMD_READ_OR_IDENTIFY
&& len
== 1) { // identify
942 // Reader asks for anticollission CSN
943 modulated_response
= resp_anticoll
;
944 modulated_response_size
= resp_anticoll_len
;
945 trace_data
= anticoll_data
;
946 trace_data_size
= sizeof(anticoll_data
);
947 //DbpString("Reader requests anticollission CSN:");
949 } else if (receivedCmd
[0] == ICLASS_CMD_READ_OR_IDENTIFY
&& len
== 4) { // read block
950 uint16_t blockNo
= receivedCmd
[1];
951 if (simulationMode
!= ICLASS_SIM_MODE_FULL
) {
952 // provide defaults for blocks 0, 1, 2, 5
954 case 0: // csn (block 00)
955 modulated_response
= resp_csn
;
956 modulated_response_size
= resp_csn_len
;
957 trace_data
= csn_data
;
958 trace_data_size
= sizeof(csn_data
);
960 case 1: // configuration (block 01)
961 modulated_response
= resp_conf
;
962 modulated_response_size
= resp_conf_len
;
963 trace_data
= conf_data
;
964 trace_data_size
= sizeof(conf_data
);
966 case 2: // e-purse (block 02)
967 modulated_response
= resp_cc
;
968 modulated_response_size
= resp_cc_len
;
969 trace_data
= card_challenge_data
;
970 trace_data_size
= sizeof(card_challenge_data
);
971 // set epurse of sim2,4 attack
972 if (reader_mac_buf
!= NULL
) {
973 memcpy(reader_mac_buf
, card_challenge_data
, 8);
976 case 5: // Application Issuer Area (block 05)
977 modulated_response
= resp_aia
;
978 modulated_response_size
= resp_aia_len
;
979 trace_data
= aia_data
;
980 trace_data_size
= sizeof(aia_data
);
982 // default: don't respond
984 } else { // use data from emulator memory
985 memcpy(data_generic_trace
, emulator
+ (receivedCmd
[1] << 3), 8);
986 AppendCrc(data_generic_trace
, 8);
987 trace_data
= data_generic_trace
;
988 trace_data_size
= 10;
989 CodeIso15693AsTag(trace_data
, trace_data_size
);
990 memcpy(data_response
, ToSend
, ToSendMax
);
991 modulated_response
= data_response
;
992 modulated_response_size
= ToSendMax
;
995 } else if (receivedCmd
[0] == ICLASS_CMD_SELECT
) {
996 // Reader selects anticollission CSN.
997 // Tag sends the corresponding real CSN
998 modulated_response
= resp_csn
;
999 modulated_response_size
= resp_csn_len
;
1000 trace_data
= csn_data
;
1001 trace_data_size
= sizeof(csn_data
);
1003 } else if (receivedCmd
[0] == ICLASS_CMD_READCHECK_KD
1004 || receivedCmd
[0] == ICLASS_CMD_READCHECK_KC
) {
1005 // Read e-purse (88 02 || 18 02)
1006 modulated_response
= resp_cc
;
1007 modulated_response_size
= resp_cc_len
;
1008 trace_data
= card_challenge_data
;
1009 trace_data_size
= sizeof(card_challenge_data
);
1012 } else if (receivedCmd
[0] == ICLASS_CMD_CHECK
) {
1013 // Reader random and reader MAC!!!
1014 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1015 //NR, from reader, is in receivedCmd+1
1016 opt_doTagMAC_2(cipher_state
, receivedCmd
+1, data_generic_trace
, diversified_key
);
1017 trace_data
= data_generic_trace
;
1018 trace_data_size
= 4;
1019 CodeIso15693AsTag(trace_data
, trace_data_size
);
1020 memcpy(data_response
, ToSend
, ToSendMax
);
1021 modulated_response
= data_response
;
1022 modulated_response_size
= ToSendMax
;
1024 } else { // Not fullsim, we don't respond
1025 // We do not know what to answer, so lets keep quiet
1026 if (simulationMode
== ICLASS_SIM_MODE_EXIT_AFTER_MAC
) {
1027 if (reader_mac_buf
!= NULL
) {
1028 // save NR and MAC for sim 2,4
1029 memcpy(reader_mac_buf
+ 8, receivedCmd
+ 1, 8);
1035 } else if (receivedCmd
[0] == ICLASS_CMD_HALT
&& len
== 1) {
1036 // Reader ends the session
1037 modulated_response
= resp_sof
;
1038 modulated_response_size
= 0;
1040 trace_data_size
= 0;
1042 } else if (receivedCmd
[0] == ICLASS_CMD_UPDATE
&& simulationMode
== ICLASS_SIM_MODE_FULL
) {
1043 // Probably the reader wants to update the nonce. Let's just ignore that for now.
1044 // OBS! If this is implemented, don't forget to regenerate the cipher_state
1045 // We're expected to respond with the data+crc, exactly what's already in the receivedCmd
1046 // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b
1047 memcpy(data_generic_trace
, receivedCmd
+ 2, 8);
1048 AppendCrc(data_generic_trace
, 8);
1049 trace_data
= data_generic_trace
;
1050 trace_data_size
= 10;
1051 CodeIso15693AsTag(trace_data
, trace_data_size
);
1052 memcpy(data_response
, ToSend
, ToSendMax
);
1053 modulated_response
= data_response
;
1054 modulated_response_size
= ToSendMax
;
1056 } else if (receivedCmd
[0] == ICLASS_CMD_PAGESEL
) {
1058 // Pagesel enables to select a page in the selected chip memory and return its configuration block
1059 // Chips with a single page will not answer to this command
1060 // It appears we're fine ignoring this.
1061 // Otherwise, we should answer 8bytes (block) + 2bytes CRC
1064 // Never seen this command before
1065 char debug_message
[250]; // should be enough
1066 sprintf(debug_message
, "Unhandled command (len = %d) received from reader:", len
);
1067 for (int i
= 0; i
< len
&& strlen(debug_message
) < sizeof(debug_message
) - 3 - 1; i
++) {
1068 sprintf(debug_message
+ strlen(debug_message
), " %02x", receivedCmd
[i
]);
1070 Dbprintf("%s", debug_message
);
1075 A legit tag has about 330us delay between reader EOT and tag SOF.
1077 if (modulated_response_size
> 0) {
1078 uint32_t response_time
= reader_eof_time
+ DELAY_ISO15693_VCD_TO_VICC_SIM
- DELAY_ARM_TO_READER_SIM
;
1079 TransmitTo15693Reader(modulated_response
, modulated_response_size
, response_time
, false);
1080 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);
1091 DbpString("Button pressed");
1093 return buttonPressed
;
1097 * @brief SimulateIClass simulates an iClass card.
1098 * @param arg0 type of simulation
1099 * - 0 uses the first 8 bytes in usb data as CSN
1100 * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified
1101 * in the usb data. This mode collects MAC from the reader, in order to do an offline
1102 * attack on the keys. For more info, see "dismantling iclass" and proxclone.com.
1103 * - Other : Uses the default CSN (031fec8af7ff12e0)
1104 * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only)
1108 void SimulateIClass(uint32_t arg0
, uint32_t arg1
, uint32_t arg2
, uint8_t *datain
) {
1109 uint32_t simType
= arg0
;
1110 uint32_t numberOfCSNS
= arg1
;
1112 // setup hardware for simulation:
1113 FpgaDownloadAndGo(FPGA_BITSTREAM_HF
);
1114 SetAdcMuxFor(GPIO_MUXSEL_HIPKD
);
1115 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR
| FPGA_HF_SIMULATOR_NO_MODULATION
);
1116 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR
);
1119 // Enable and clear the trace
1122 //Use the emulator memory for SIM
1123 uint8_t *emulator
= BigBuf_get_EM_addr();
1125 if (simType
== ICLASS_SIM_MODE_CSN
) {
1126 // Use the CSN from commandline
1127 memcpy(emulator
, datain
, 8);
1128 doIClassSimulation(ICLASS_SIM_MODE_CSN
, NULL
);
1129 } else if (simType
== ICLASS_SIM_MODE_CSN_DEFAULT
) {
1131 uint8_t csn_crc
[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
1132 // Use the CSN from commandline
1133 memcpy(emulator
, csn_crc
, 8);
1134 doIClassSimulation(ICLASS_SIM_MODE_CSN
, NULL
);
1135 } else if (simType
== ICLASS_SIM_MODE_READER_ATTACK
) {
1136 uint8_t mac_responses
[USB_CMD_DATA_SIZE
] = { 0 };
1137 Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS
);
1138 // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
1139 // in order to collect MAC's from the reader. This can later be used in an offline-attack
1140 // in order to obtain the keys, as in the "dismantling iclass"-paper.
1142 for (i
= 0; i
< numberOfCSNS
&& i
*16+16 <= USB_CMD_DATA_SIZE
; i
++) {
1143 // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response).
1144 memcpy(emulator
, datain
+(i
*8), 8);
1145 if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC
, mac_responses
+i
*16)) {
1149 Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
1150 datain
[i
*8+0], datain
[i
*8+1], datain
[i
*8+2], datain
[i
*8+3],
1151 datain
[i
*8+4], datain
[i
*8+5], datain
[i
*8+6], datain
[i
*8+7]);
1152 Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x",
1153 datain
[i
*8+ 8], datain
[i
*8+ 9], datain
[i
*8+10], datain
[i
*8+11],
1154 datain
[i
*8+12], datain
[i
*8+13], datain
[i
*8+14], datain
[i
*8+15]);
1156 cmd_send(CMD_ACK
, CMD_SIMULATE_TAG_ICLASS
, i
, 0, mac_responses
, i
*16);
1157 } else if (simType
== ICLASS_SIM_MODE_FULL
) {
1158 //This is 'full sim' mode, where we use the emulator storage for data.
1159 doIClassSimulation(ICLASS_SIM_MODE_FULL
, NULL
);
1161 // We may want a mode here where we hardcode the csns to use (from proxclone).
1162 // That will speed things up a little, but not required just yet.
1163 Dbprintf("The mode is not implemented, reserved for future use");
1165 Dbprintf("Done...");
1172 //-----------------------------------------------------------------------------
1173 // Transmit the command (to the tag) that was placed in ToSend[].
1174 //-----------------------------------------------------------------------------
1175 static void TransmitIClassCommand(const uint8_t *cmd
, int len
, int *samples
, int *wait
) {
1177 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A
| FPGA_HF_ISO14443A_READER_MOD
);
1178 AT91C_BASE_SSC
->SSC_THR
= 0x00;
1179 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A
);
1182 if (*wait
< 10) *wait
= 10;
1184 for (c
= 0; c
< *wait
;) {
1185 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_TXRDY
)) {
1186 AT91C_BASE_SSC
->SSC_THR
= 0x00; // For exact timing!
1189 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_RXRDY
)) {
1190 volatile uint32_t r
= AT91C_BASE_SSC
->SSC_RHR
;
1198 bool firstpart
= true;
1201 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_TXRDY
)) {
1203 // DOUBLE THE SAMPLES!
1205 sendbyte
= (cmd
[c
] & 0xf0) | (cmd
[c
] >> 4);
1207 sendbyte
= (cmd
[c
] & 0x0f) | (cmd
[c
] << 4);
1210 if (sendbyte
== 0xff) {
1213 AT91C_BASE_SSC
->SSC_THR
= sendbyte
;
1214 firstpart
= !firstpart
;
1220 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_RXRDY
)) {
1221 volatile uint32_t r
= AT91C_BASE_SSC
->SSC_RHR
;
1226 if (samples
&& wait
) *samples
= (c
+ *wait
) << 3;
1230 //-----------------------------------------------------------------------------
1231 // Prepare iClass reader command to send to FPGA
1232 //-----------------------------------------------------------------------------
1233 void CodeIClassCommand(const uint8_t *cmd
, int len
) {
1238 // Start of Communication: 1 out of 4
1239 ToSend
[++ToSendMax
] = 0xf0;
1240 ToSend
[++ToSendMax
] = 0x00;
1241 ToSend
[++ToSendMax
] = 0x0f;
1242 ToSend
[++ToSendMax
] = 0x00;
1244 // Modulate the bytes
1245 for (i
= 0; i
< len
; i
++) {
1247 for (j
= 0; j
< 4; j
++) {
1248 for (k
= 0; k
< 4; k
++) {
1250 ToSend
[++ToSendMax
] = 0xf0;
1252 ToSend
[++ToSendMax
] = 0x00;
1259 // End of Communication
1260 ToSend
[++ToSendMax
] = 0x00;
1261 ToSend
[++ToSendMax
] = 0x00;
1262 ToSend
[++ToSendMax
] = 0xf0;
1263 ToSend
[++ToSendMax
] = 0x00;
1265 // Convert from last character reference to length
1269 static void ReaderTransmitIClass(uint8_t *frame
, int len
) {
1273 // This is tied to other size changes
1274 CodeIClassCommand(frame
, len
);
1277 TransmitIClassCommand(ToSend
, ToSendMax
, &samples
, &wait
);
1281 // Store reader command in buffer
1282 uint8_t par
[MAX_PARITY_SIZE
];
1283 GetParity(frame
, len
, par
);
1284 LogTrace(frame
, len
, rsamples
, rsamples
, par
, true);
1287 //-----------------------------------------------------------------------------
1288 // Wait a certain time for tag response
1289 // If a response is captured return true
1290 // If it takes too long return false
1291 //-----------------------------------------------------------------------------
1292 static int GetIClassAnswer(uint8_t *receivedResponse
, int maxLen
, int *samples
, int *elapsed
) {
1294 // buffer needs to be 512 bytes
1297 // Set FPGA mode to "reader listen mode", no modulation (listen
1298 // only, since we are receiving, not transmitting).
1299 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A
| FPGA_HF_ISO14443A_READER_LISTEN
);
1301 // Now get the answer from the card
1302 Demod
.output
= receivedResponse
;
1304 Demod
.state
= DEMOD_UNSYNCD
;
1307 if (elapsed
) *elapsed
= 0;
1315 if (BUTTON_PRESS()) return false;
1317 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_TXRDY
)) {
1318 AT91C_BASE_SSC
->SSC_THR
= 0x00; // To make use of exact timing of next command from reader!!
1319 if (elapsed
) (*elapsed
)++;
1321 if (AT91C_BASE_SSC
->SSC_SR
& (AT91C_SSC_RXRDY
)) {
1327 b
= (uint8_t)AT91C_BASE_SSC
->SSC_RHR
;
1331 if (ManchesterDecoding(b
& 0x0f)) {
1339 static int ReaderReceiveIClass(uint8_t *receivedAnswer
) {
1341 if (!GetIClassAnswer(receivedAnswer
, 160, &samples
, 0)) {
1344 rsamples
+= samples
;
1345 uint8_t parity
[MAX_PARITY_SIZE
];
1346 GetParity(receivedAnswer
, Demod
.len
, parity
);
1347 LogTrace(receivedAnswer
, Demod
.len
, rsamples
, rsamples
, parity
, false);
1348 if (samples
== 0) return false;
1352 static void setupIclassReader() {
1353 FpgaDownloadAndGo(FPGA_BITSTREAM_HF
);
1354 // Reset trace buffer
1359 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A
);
1360 // Start from off (no field generated)
1361 // Signal field is off with the appropriate LED
1363 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1366 SetAdcMuxFor(GPIO_MUXSEL_HIPKD
);
1368 // Now give it time to spin up.
1369 // Signal field is on with the appropriate LED
1370 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A
| FPGA_HF_ISO14443A_READER_MOD
);
1376 static bool sendCmdGetResponseWithRetries(uint8_t* command
, size_t cmdsize
, uint8_t* resp
, uint8_t expected_size
, uint8_t retries
) {
1377 while (retries
-- > 0) {
1378 ReaderTransmitIClass(command
, cmdsize
);
1379 if (expected_size
== ReaderReceiveIClass(resp
)) {
1383 return false;//Error
1387 * @brief Talks to an iclass tag, sends the commands to get CSN and CC.
1388 * @param card_data where the CSN and CC are stored for return
1391 * 2 = Got CSN and CC
1393 static uint8_t handshakeIclassTag_ext(uint8_t *card_data
, bool use_credit_key
) {
1394 static uint8_t act_all
[] = { 0x0a };
1395 //static uint8_t identify[] = { 0x0c };
1396 static uint8_t identify
[] = { 0x0c, 0x00, 0x73, 0x33 };
1397 static uint8_t select
[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1398 static uint8_t readcheck_cc
[]= { 0x88, 0x02 };
1400 readcheck_cc
[0] = 0x18;
1402 readcheck_cc
[0] = 0x88;
1404 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1406 uint8_t read_status
= 0;
1409 ReaderTransmitIClass(act_all
, 1);
1411 if (!ReaderReceiveIClass(resp
)) return read_status
;//Fail
1413 ReaderTransmitIClass(identify
, 1);
1414 //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
1415 uint8_t len
= ReaderReceiveIClass(resp
);
1416 if (len
!= 10) return read_status
;//Fail
1418 //Copy the Anti-collision CSN to our select-packet
1419 memcpy(&select
[1], resp
, 8);
1421 ReaderTransmitIClass(select
, sizeof(select
));
1422 //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
1423 len
= ReaderReceiveIClass(resp
);
1424 if (len
!= 10) return read_status
;//Fail
1426 //Success - level 1, we got CSN
1427 //Save CSN in response data
1428 memcpy(card_data
, resp
, 8);
1430 //Flag that we got to at least stage 1, read CSN
1433 // Card selected, now read e-purse (cc) (only 8 bytes no CRC)
1434 ReaderTransmitIClass(readcheck_cc
, sizeof(readcheck_cc
));
1435 if (ReaderReceiveIClass(resp
) == 8) {
1436 //Save CC (e-purse) in response data
1437 memcpy(card_data
+8, resp
, 8);
1444 static uint8_t handshakeIclassTag(uint8_t *card_data
) {
1445 return handshakeIclassTag_ext(card_data
, false);
1449 // Reader iClass Anticollission
1450 void ReaderIClass(uint8_t arg0
) {
1452 uint8_t card_data
[6 * 8] = {0};
1453 memset(card_data
, 0xFF, sizeof(card_data
));
1454 uint8_t last_csn
[8] = {0,0,0,0,0,0,0,0};
1455 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1456 memset(resp
, 0xFF, sizeof(resp
));
1457 //Read conf block CRC(0x01) => 0xfa 0x22
1458 uint8_t readConf
[] = { ICLASS_CMD_READ_OR_IDENTIFY
, 0x01, 0xfa, 0x22};
1459 //Read App Issuer Area block CRC(0x05) => 0xde 0x64
1460 uint8_t readAA
[] = { ICLASS_CMD_READ_OR_IDENTIFY
, 0x05, 0xde, 0x64};
1463 uint8_t result_status
= 0;
1464 // flag to read until one tag is found successfully
1465 bool abort_after_read
= arg0
& FLAG_ICLASS_READER_ONLY_ONCE
;
1466 // flag to only try 5 times to find one tag then return
1467 bool try_once
= arg0
& FLAG_ICLASS_READER_ONE_TRY
;
1468 // if neither abort_after_read nor try_once then continue reading until button pressed.
1470 bool use_credit_key
= arg0
& FLAG_ICLASS_READER_CEDITKEY
;
1471 // test flags for what blocks to be sure to read
1472 uint8_t flagReadConfig
= arg0
& FLAG_ICLASS_READER_CONF
;
1473 uint8_t flagReadCC
= arg0
& FLAG_ICLASS_READER_CC
;
1474 uint8_t flagReadAA
= arg0
& FLAG_ICLASS_READER_AA
;
1477 setupIclassReader();
1479 uint16_t tryCnt
= 0;
1480 bool userCancelled
= BUTTON_PRESS() || usb_poll_validate_length();
1481 while (!userCancelled
) {
1482 // if only looking for one card try 2 times if we missed it the first time
1483 if (try_once
&& tryCnt
> 2) {
1487 if (!get_tracing()) {
1488 DbpString("Trace full");
1493 read_status
= handshakeIclassTag_ext(card_data
, use_credit_key
);
1495 if (read_status
== 0) continue;
1496 if (read_status
== 1) result_status
= FLAG_ICLASS_READER_CSN
;
1497 if (read_status
== 2) result_status
= FLAG_ICLASS_READER_CSN
| FLAG_ICLASS_READER_CC
;
1499 // handshakeIclass returns CSN|CC, but the actual block
1500 // layout is CSN|CONFIG|CC, so here we reorder the data,
1501 // moving CC forward 8 bytes
1502 memcpy(card_data
+16, card_data
+8, 8);
1503 //Read block 1, config
1504 if (flagReadConfig
) {
1505 if (sendCmdGetResponseWithRetries(readConf
, sizeof(readConf
), resp
, 10, 10)) {
1506 result_status
|= FLAG_ICLASS_READER_CONF
;
1507 memcpy(card_data
+8, resp
, 8);
1509 Dbprintf("Failed to dump config block");
1515 if (sendCmdGetResponseWithRetries(readAA
, sizeof(readAA
), resp
, 10, 10)) {
1516 result_status
|= FLAG_ICLASS_READER_AA
;
1517 memcpy(card_data
+ (8*5), resp
, 8);
1519 //Dbprintf("Failed to dump AA block");
1524 // 1 : Configuration
1526 // 3 : kd / debit / aa2 (write-only)
1527 // 4 : kc / credit / aa1 (write-only)
1528 // 5 : AIA, Application issuer area
1529 //Then we can 'ship' back the 6 * 8 bytes of data,
1530 // with 0xFF:s in block 3 and 4.
1533 //Send back to client, but don't bother if we already sent this -
1534 // only useful if looping in arm (not try_once && not abort_after_read)
1535 if (memcmp(last_csn
, card_data
, 8) != 0) {
1536 // If caller requires that we get Conf, CC, AA, continue until we got it
1537 if ( (result_status
^ FLAG_ICLASS_READER_CSN
^ flagReadConfig
^ flagReadCC
^ flagReadAA
) == 0) {
1538 cmd_send(CMD_ACK
, result_status
, 0, 0, card_data
, sizeof(card_data
));
1539 if (abort_after_read
) {
1544 //Save that we already sent this....
1545 memcpy(last_csn
, card_data
, 8);
1550 userCancelled
= BUTTON_PRESS() || usb_poll_validate_length();
1552 if (userCancelled
) {
1553 cmd_send(CMD_ACK
, 0xFF, 0, 0, card_data
, 0);
1555 cmd_send(CMD_ACK
, 0, 0, 0, card_data
, 0);
1560 void ReaderIClass_Replay(uint8_t arg0
, uint8_t *MAC
) {
1562 uint8_t card_data
[USB_CMD_DATA_SIZE
]={0};
1563 uint16_t block_crc_LUT
[255] = {0};
1565 //Generate a lookup table for block crc
1566 for (int block
= 0; block
< 255; block
++){
1568 block_crc_LUT
[block
] = iclass_crc16(&bl
,1);
1570 //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]);
1572 uint8_t check
[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1573 uint8_t read
[] = { 0x0c, 0x00, 0x00, 0x00 };
1576 uint8_t cardsize
= 0;
1579 static struct memory_t
{
1587 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1589 setupIclassReader();
1592 while (!BUTTON_PRESS()) {
1596 if (!get_tracing()) {
1597 DbpString("Trace full");
1601 uint8_t read_status
= handshakeIclassTag(card_data
);
1602 if (read_status
< 2) continue;
1604 //for now replay captured auth (as cc not updated)
1605 memcpy(check
+5, MAC
, 4);
1607 if (!sendCmdGetResponseWithRetries(check
, sizeof(check
), resp
, 4, 5)) {
1608 Dbprintf("Error: Authentication Fail!");
1612 //first get configuration block (block 1)
1613 crc
= block_crc_LUT
[1];
1616 read
[3] = crc
& 0xff;
1618 if (!sendCmdGetResponseWithRetries(read
, sizeof(read
),resp
, 10, 10)) {
1619 Dbprintf("Dump config (block 1) failed");
1624 memory
.k16
= (mem
& 0x80);
1625 memory
.book
= (mem
& 0x20);
1626 memory
.k2
= (mem
& 0x8);
1627 memory
.lockauth
= (mem
& 0x2);
1628 memory
.keyaccess
= (mem
& 0x1);
1630 cardsize
= memory
.k16
? 255 : 32;
1632 //Set card_data to all zeroes, we'll fill it with data
1633 memset(card_data
, 0x0, USB_CMD_DATA_SIZE
);
1634 uint8_t failedRead
= 0;
1635 uint32_t stored_data_length
= 0;
1636 //then loop around remaining blocks
1637 for (int block
= 0; block
< cardsize
; block
++) {
1639 crc
= block_crc_LUT
[block
];
1641 read
[3] = crc
& 0xff;
1643 if (sendCmdGetResponseWithRetries(read
, sizeof(read
), resp
, 10, 10)) {
1644 Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
1645 block
, resp
[0], resp
[1], resp
[2],
1646 resp
[3], resp
[4], resp
[5],
1649 //Fill up the buffer
1650 memcpy(card_data
+stored_data_length
, resp
, 8);
1651 stored_data_length
+= 8;
1652 if (stored_data_length
+8 > USB_CMD_DATA_SIZE
) {
1653 //Time to send this off and start afresh
1655 stored_data_length
,//data length
1656 failedRead
,//Failed blocks?
1658 card_data
, stored_data_length
);
1660 stored_data_length
= 0;
1666 stored_data_length
+= 8;//Otherwise, data becomes misaligned
1667 Dbprintf("Failed to dump block %d", block
);
1671 //Send off any remaining data
1672 if (stored_data_length
> 0) {
1674 stored_data_length
,//data length
1675 failedRead
,//Failed blocks?
1678 stored_data_length
);
1680 //If we got here, let's break
1683 //Signal end of transmission
1694 void iClass_ReadCheck(uint8_t blockNo
, uint8_t keyType
) {
1695 uint8_t readcheck
[] = { keyType
, blockNo
};
1696 uint8_t resp
[] = {0,0,0,0,0,0,0,0};
1698 isOK
= sendCmdGetResponseWithRetries(readcheck
, sizeof(readcheck
), resp
, sizeof(resp
), 6);
1699 cmd_send(CMD_ACK
,isOK
, 0, 0, 0, 0);
1702 void iClass_Authentication(uint8_t *MAC
) {
1703 uint8_t check
[] = { ICLASS_CMD_CHECK
, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1704 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1705 memcpy(check
+5, MAC
, 4);
1707 isOK
= sendCmdGetResponseWithRetries(check
, sizeof(check
), resp
, 4, 6);
1708 cmd_send(CMD_ACK
,isOK
, 0, 0, 0, 0);
1711 bool iClass_ReadBlock(uint8_t blockNo
, uint8_t *readdata
) {
1712 uint8_t readcmd
[] = {ICLASS_CMD_READ_OR_IDENTIFY
, blockNo
, 0x00, 0x00}; //0x88, 0x00 // can i use 0C?
1714 uint16_t rdCrc
= iclass_crc16(&bl
, 1);
1715 readcmd
[2] = rdCrc
>> 8;
1716 readcmd
[3] = rdCrc
& 0xff;
1717 uint8_t resp
[] = {0,0,0,0,0,0,0,0,0,0};
1720 //readcmd[1] = blockNo;
1721 isOK
= sendCmdGetResponseWithRetries(readcmd
, sizeof(readcmd
), resp
, 10, 10);
1722 memcpy(readdata
, resp
, sizeof(resp
));
1727 void iClass_ReadBlk(uint8_t blockno
) {
1728 uint8_t readblockdata
[] = {0,0,0,0,0,0,0,0,0,0};
1730 isOK
= iClass_ReadBlock(blockno
, readblockdata
);
1731 cmd_send(CMD_ACK
, isOK
, 0, 0, readblockdata
, 8);
1734 void iClass_Dump(uint8_t blockno
, uint8_t numblks
) {
1735 uint8_t readblockdata
[] = {0,0,0,0,0,0,0,0,0,0};
1740 uint8_t *dataout
= BigBuf_malloc(255*8);
1741 if (dataout
== NULL
) {
1742 Dbprintf("out of memory");
1743 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1745 cmd_send(CMD_ACK
, 0, 1, 0, 0, 0);
1749 memset(dataout
, 0xFF, 255*8);
1751 for ( ; blkCnt
< numblks
; blkCnt
++) {
1752 isOK
= iClass_ReadBlock(blockno
+blkCnt
, readblockdata
);
1753 if (!isOK
|| (readblockdata
[0] == 0xBB || readblockdata
[7] == 0xBB || readblockdata
[2] == 0xBB)) { //try again
1754 isOK
= iClass_ReadBlock(blockno
+blkCnt
, readblockdata
);
1756 Dbprintf("Block %02X failed to read", blkCnt
+blockno
);
1760 memcpy(dataout
+ (blkCnt
*8), readblockdata
, 8);
1762 //return pointer to dump memory in arg3
1763 cmd_send(CMD_ACK
, isOK
, blkCnt
, BigBuf_max_traceLen(), 0, 0);
1764 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1769 static bool iClass_WriteBlock_ext(uint8_t blockNo
, uint8_t *data
) {
1770 uint8_t write
[] = { ICLASS_CMD_UPDATE
, blockNo
, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1771 //uint8_t readblockdata[10];
1772 //write[1] = blockNo;
1773 memcpy(write
+2, data
, 12); // data + mac
1774 char *wrCmd
= (char *)(write
+1);
1775 uint16_t wrCrc
= iclass_crc16(wrCmd
, 13);
1776 write
[14] = wrCrc
>> 8;
1777 write
[15] = wrCrc
& 0xff;
1778 uint8_t resp
[] = {0,0,0,0,0,0,0,0,0,0};
1781 isOK
= sendCmdGetResponseWithRetries(write
, sizeof(write
), resp
, sizeof(resp
), 10);
1782 if (isOK
) { //if reader responded correctly
1783 //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]);
1784 if (memcmp(write
+2, resp
, 8)) { //if response is not equal to write values
1785 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)
1787 isOK
= sendCmdGetResponseWithRetries(write
, sizeof(write
), resp
, sizeof(resp
), 10);
1794 void iClass_WriteBlock(uint8_t blockNo
, uint8_t *data
) {
1795 bool isOK
= iClass_WriteBlock_ext(blockNo
, data
);
1797 Dbprintf("Write block [%02x] successful", blockNo
);
1799 Dbprintf("Write block [%02x] failed", blockNo
);
1801 cmd_send(CMD_ACK
, isOK
, 0, 0, 0, 0);
1804 void iClass_Clone(uint8_t startblock
, uint8_t endblock
, uint8_t *data
) {
1807 int total_block
= (endblock
- startblock
) + 1;
1808 for (i
= 0; i
< total_block
; i
++) {
1810 if (iClass_WriteBlock_ext(i
+startblock
, data
+ (i
*12))){
1811 Dbprintf("Write block [%02x] successful", i
+ startblock
);
1814 if (iClass_WriteBlock_ext(i
+startblock
, data
+ (i
*12))){
1815 Dbprintf("Write block [%02x] successful", i
+ startblock
);
1818 Dbprintf("Write block [%02x] failed", i
+ startblock
);
1822 if (written
== total_block
)
1823 Dbprintf("Clone complete");
1825 Dbprintf("Clone incomplete");
1827 cmd_send(CMD_ACK
, 1, 0, 0, 0, 0);
1828 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);