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 // iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after
61 // the reader command. This is measured from end of reader EOF to first modulation of the tag's SOF which starts with a 56,64us unmodulated period.
62 // 330us = 140 ssp_clk cycles @ 423,75kHz when simulating.
63 // 56,64us = 24 ssp_clk_cycles
64 #define DELAY_ICLASS_VCD_TO_VICC_SIM (140 - 24)
65 // times in ssp_clk_cycles @ 3,3625MHz when acting as reader
66 #define DELAY_ICLASS_VICC_TO_VCD_READER DELAY_ISO15693_VICC_TO_VCD_READER
67 // times in samples @ 212kHz when acting as reader
68 #define ICLASS_READER_TIMEOUT_ACTALL 330 // 1558us, nominal 330us + 7slots*160us = 1450us
69 #define ICLASS_READER_TIMEOUT_OTHERS 80 // 380us, nominal 330us
72 //-----------------------------------------------------------------------------
73 // The software UART that receives commands from the reader, and its state
75 //-----------------------------------------------------------------------------
79 STATE_START_OF_COMMUNICATION
,
99 static RAMFUNC
int OutOfNDecoding(int bit
) {
103 if (!Uart
.bitBuffer
) {
104 Uart
.bitBuffer
= bit
^ 0xFF0;
107 Uart
.bitBuffer
<<= 4;
108 Uart
.bitBuffer
^= bit
;
111 /*if (Uart.swapper) {
112 Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
115 if (Uart.byteCnt > 15) { return true; }
121 if (Uart
.state
!= STATE_UNSYNCD
) {
124 if ((Uart
.bitBuffer
& Uart
.syncBit
) ^ Uart
.syncBit
) {
129 if (((Uart
.bitBuffer
<< 1) & Uart
.syncBit
) ^ Uart
.syncBit
) {
134 if (bit
!= bitright
) {
139 // So, now we only have to deal with *bit*, lets see...
140 if (Uart
.posCnt
== 1) {
141 // measurement first half bitperiod
143 // Drop in first half means that we are either seeing
146 if (Uart
.nOutOfCnt
== 1) {
147 // End of Communication
148 Uart
.state
= STATE_UNSYNCD
;
150 if (Uart
.byteCnt
== 0) {
151 // Its not straightforward to show single EOFs
152 // So just leave it and do not return true
153 Uart
.output
[0] = 0xf0;
158 } else if (Uart
.state
!= STATE_START_OF_COMMUNICATION
) {
159 // When not part of SOF or EOF, it is an error
160 Uart
.state
= STATE_UNSYNCD
;
166 // measurement second half bitperiod
167 // Count the bitslot we are in... (ISO 15693)
171 if (Uart
.dropPosition
) {
172 if (Uart
.state
== STATE_START_OF_COMMUNICATION
) {
177 // It is an error if we already have seen a drop in current frame
178 Uart
.state
= STATE_UNSYNCD
;
181 Uart
.dropPosition
= Uart
.nOutOfCnt
;
188 if (Uart
.nOutOfCnt
== Uart
.OutOfCnt
&& Uart
.OutOfCnt
== 4) {
191 if (Uart
.state
== STATE_START_OF_COMMUNICATION
) {
192 if (Uart
.dropPosition
== 4) {
193 Uart
.state
= STATE_RECEIVING
;
195 } else if (Uart
.dropPosition
== 3) {
196 Uart
.state
= STATE_RECEIVING
;
198 //Uart.output[Uart.byteCnt] = 0xdd;
201 Uart
.state
= STATE_UNSYNCD
;
204 Uart
.dropPosition
= 0;
208 if (!Uart
.dropPosition
) {
209 Uart
.state
= STATE_UNSYNCD
;
217 //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; }
218 //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; }
220 Uart
.shiftReg
^= ((Uart
.dropPosition
& 0x03) << 6);
222 Uart
.dropPosition
= 0;
224 if (Uart
.bitCnt
== 8) {
225 Uart
.output
[Uart
.byteCnt
] = (Uart
.shiftReg
& 0xff);
232 } else if (Uart
.nOutOfCnt
== Uart
.OutOfCnt
) {
235 if (!Uart
.dropPosition
) {
236 Uart
.state
= STATE_UNSYNCD
;
241 Uart
.output
[Uart
.byteCnt
] = (Uart
.dropPosition
& 0xff);
246 Uart
.dropPosition
= 0;
251 Uart.output[Uart.byteCnt] = 0xAA;
253 Uart.output[Uart.byteCnt] = error & 0xFF;
255 Uart.output[Uart.byteCnt] = 0xAA;
257 Uart.output[Uart.byteCnt] = (Uart.bitBuffer >> 8) & 0xFF;
259 Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
261 Uart.output[Uart.byteCnt] = (Uart.syncBit >> 3) & 0xFF;
263 Uart.output[Uart.byteCnt] = 0xAA;
270 bit
= Uart
.bitBuffer
& 0xf0;
272 bit
^= 0x0F; // drops become 1s ;-)
274 // should have been high or at least (4 * 128) / fc
275 // according to ISO this should be at least (9 * 128 + 20) / fc
276 if (Uart
.highCnt
== 8) {
277 // we went low, so this could be start of communication
278 // it turns out to be safer to choose a less significant
279 // syncbit... so we check whether the neighbour also represents the drop
280 Uart
.posCnt
= 1; // apparently we are busy with our first half bit period
281 Uart
.syncBit
= bit
& 8;
283 if (!Uart
.syncBit
) { Uart
.syncBit
= bit
& 4; Uart
.samples
= 2; }
284 else if (bit
& 4) { Uart
.syncBit
= bit
& 4; Uart
.samples
= 2; bit
<<= 2; }
285 if (!Uart
.syncBit
) { Uart
.syncBit
= bit
& 2; Uart
.samples
= 1; }
286 else if (bit
& 2) { Uart
.syncBit
= bit
& 2; Uart
.samples
= 1; bit
<<= 1; }
287 if (!Uart
.syncBit
) { Uart
.syncBit
= bit
& 1; Uart
.samples
= 0;
288 if (Uart
.syncBit
&& (Uart
.bitBuffer
& 8)) {
291 // the first half bit period is expected in next sample
295 } else if (bit
& 1) { Uart
.syncBit
= bit
& 1; Uart
.samples
= 0; }
298 Uart
.state
= STATE_START_OF_COMMUNICATION
;
302 Uart
.OutOfCnt
= 4; // Start at 1/4, could switch to 1/256
303 Uart
.dropPosition
= 0;
309 } else if (Uart
.highCnt
< 8) {
318 //=============================================================================
320 //=============================================================================
325 DEMOD_START_OF_COMMUNICATION
,
326 DEMOD_START_OF_COMMUNICATION2
,
327 DEMOD_START_OF_COMMUNICATION3
,
331 DEMOD_END_OF_COMMUNICATION
,
332 DEMOD_END_OF_COMMUNICATION2
,
355 static RAMFUNC
int ManchesterDecoding(int v
) {
361 Demod
.buffer
= Demod
.buffer2
;
362 Demod
.buffer2
= Demod
.buffer3
;
365 if (Demod
.buff
< 3) {
370 if (Demod
.state
==DEMOD_UNSYNCD
) {
371 Demod
.output
[Demod
.len
] = 0xfa;
374 Demod
.posCount
= 1; // This is the first half bit period, so after syncing handle the second part
377 Demod
.syncBit
= 0x08;
384 Demod
.syncBit
= 0x04;
391 Demod
.syncBit
= 0x02;
394 if (bit
& 0x01 && Demod
.syncBit
) {
395 Demod
.syncBit
= 0x01;
400 Demod
.state
= DEMOD_START_OF_COMMUNICATION
;
401 Demod
.sub
= SUB_FIRST_HALF
;
405 if (Demod
.posCount
) {
406 switch (Demod
.syncBit
) {
407 case 0x08: Demod
.samples
= 3; break;
408 case 0x04: Demod
.samples
= 2; break;
409 case 0x02: Demod
.samples
= 1; break;
410 case 0x01: Demod
.samples
= 0; break;
412 // SOF must be long burst... otherwise stay unsynced!!!
413 if (!(Demod
.buffer
& Demod
.syncBit
) || !(Demod
.buffer2
& Demod
.syncBit
)) {
414 Demod
.state
= DEMOD_UNSYNCD
;
417 // SOF must be long burst... otherwise stay unsynced!!!
418 if (!(Demod
.buffer2
& Demod
.syncBit
) || !(Demod
.buffer3
& Demod
.syncBit
)) {
419 Demod
.state
= DEMOD_UNSYNCD
;
428 // state is DEMOD is in SYNC from here on.
429 modulation
= bit
& Demod
.syncBit
;
430 modulation
|= ((bit
<< 1) ^ ((Demod
.buffer
& 0x08) >> 3)) & Demod
.syncBit
;
434 if (Demod
.posCount
== 0) {
437 Demod
.sub
= SUB_FIRST_HALF
;
439 Demod
.sub
= SUB_NONE
;
444 if (Demod
.sub
== SUB_FIRST_HALF
) {
445 Demod
.sub
= SUB_BOTH
;
447 Demod
.sub
= SUB_SECOND_HALF
;
449 } else if (Demod
.sub
== SUB_NONE
) {
450 if (Demod
.state
== DEMOD_SOF_COMPLETE
) {
451 Demod
.output
[Demod
.len
] = 0x0f;
453 Demod
.state
= DEMOD_UNSYNCD
;
456 Demod
.state
= DEMOD_ERROR_WAIT
;
461 switch(Demod
.state
) {
462 case DEMOD_START_OF_COMMUNICATION
:
463 if (Demod
.sub
== SUB_BOTH
) {
464 Demod
.state
= DEMOD_START_OF_COMMUNICATION2
;
466 Demod
.sub
= SUB_NONE
;
468 Demod
.output
[Demod
.len
] = 0xab;
469 Demod
.state
= DEMOD_ERROR_WAIT
;
473 case DEMOD_START_OF_COMMUNICATION2
:
474 if (Demod
.sub
== SUB_SECOND_HALF
) {
475 Demod
.state
= DEMOD_START_OF_COMMUNICATION3
;
477 Demod
.output
[Demod
.len
] = 0xab;
478 Demod
.state
= DEMOD_ERROR_WAIT
;
482 case DEMOD_START_OF_COMMUNICATION3
:
483 if (Demod
.sub
== SUB_SECOND_HALF
) {
484 Demod
.state
= DEMOD_SOF_COMPLETE
;
486 Demod
.output
[Demod
.len
] = 0xab;
487 Demod
.state
= DEMOD_ERROR_WAIT
;
491 case DEMOD_SOF_COMPLETE
:
492 case DEMOD_MANCHESTER_D
:
493 case DEMOD_MANCHESTER_E
:
494 // OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443)
495 // 00001111 = 1 (0 in 14443)
496 if (Demod
.sub
== SUB_SECOND_HALF
) { // SUB_FIRST_HALF
498 Demod
.shiftReg
= (Demod
.shiftReg
>> 1) ^ 0x100;
499 Demod
.state
= DEMOD_MANCHESTER_D
;
500 } else if (Demod
.sub
== SUB_FIRST_HALF
) { // SUB_SECOND_HALF
502 Demod
.shiftReg
>>= 1;
503 Demod
.state
= DEMOD_MANCHESTER_E
;
504 } else if (Demod
.sub
== SUB_BOTH
) {
505 Demod
.state
= DEMOD_MANCHESTER_F
;
507 Demod
.state
= DEMOD_ERROR_WAIT
;
512 case DEMOD_MANCHESTER_F
:
513 // Tag response does not need to be a complete byte!
514 if (Demod
.len
> 0 || Demod
.bitCount
> 0) {
515 if (Demod
.bitCount
> 1) { // was > 0, do not interpret last closing bit, is part of EOF
516 Demod
.shiftReg
>>= (9 - Demod
.bitCount
); // right align data
517 Demod
.output
[Demod
.len
] = Demod
.shiftReg
& 0xff;
521 Demod
.state
= DEMOD_UNSYNCD
;
524 Demod
.output
[Demod
.len
] = 0xad;
525 Demod
.state
= DEMOD_ERROR_WAIT
;
530 case DEMOD_ERROR_WAIT
:
531 Demod
.state
= DEMOD_UNSYNCD
;
535 Demod
.output
[Demod
.len
] = 0xdd;
536 Demod
.state
= DEMOD_UNSYNCD
;
540 if (Demod
.bitCount
>= 8) {
541 Demod
.shiftReg
>>= 1;
542 Demod
.output
[Demod
.len
] = (Demod
.shiftReg
& 0xff);
549 Demod
.output
[Demod
.len
] = 0xBB;
551 Demod
.output
[Demod
.len
] = error
& 0xFF;
553 Demod
.output
[Demod
.len
] = 0xBB;
555 Demod
.output
[Demod
.len
] = bit
& 0xFF;
557 Demod
.output
[Demod
.len
] = Demod
.buffer
& 0xFF;
560 Demod
.output
[Demod
.len
] = Demod
.buffer2
& 0xFF;
562 Demod
.output
[Demod
.len
] = Demod
.syncBit
& 0xFF;
564 Demod
.output
[Demod
.len
] = 0xBB;
571 } // end (state != UNSYNCED)
576 //=============================================================================
577 // Finally, a `sniffer' for iClass communication
578 // Both sides of communication!
579 //=============================================================================
581 //-----------------------------------------------------------------------------
582 // Record the sequence of commands sent by the reader to the tag, with
583 // triggering so that we start recording at the point that the tag is moved
585 //-----------------------------------------------------------------------------
586 void RAMFUNC
SnoopIClass(void) {
588 // We won't start recording the frames that we acquire until we trigger;
589 // a good trigger condition to get started is probably when we see a
590 // response from the tag.
591 //int triggered = false; // false to wait first for card
593 // The command (reader -> tag) that we're receiving.
594 // The length of a received command will in most cases be no more than 18 bytes.
595 // So 32 should be enough!
596 #define ICLASS_BUFFER_SIZE 32
597 uint8_t readerToTagCmd
[ICLASS_BUFFER_SIZE
];
598 // The response (tag -> reader) that we're receiving.
599 uint8_t tagToReaderResponse
[ICLASS_BUFFER_SIZE
];
601 FpgaDownloadAndGo(FPGA_BITSTREAM_HF
);
603 // free all BigBuf memory
605 // The DMA buffer, used to stream samples from the FPGA
606 uint8_t *dmaBuf
= BigBuf_malloc(DMA_BUFFER_SIZE
);
610 iso14a_set_trigger(false);
617 // Count of samples received so far, so that we can include timing
618 // information in the trace buffer.
622 // Set up the demodulator for tag -> reader responses.
623 Demod
.output
= tagToReaderResponse
;
625 Demod
.state
= DEMOD_UNSYNCD
;
627 // Setup for the DMA.
628 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A
);
630 lastRxCounter
= DMA_BUFFER_SIZE
;
631 FpgaSetupSscDma((uint8_t *)dmaBuf
, DMA_BUFFER_SIZE
);
633 // And the reader -> tag commands
634 memset(&Uart
, 0, sizeof(Uart
));
635 Uart
.output
= readerToTagCmd
;
636 Uart
.byteCntMax
= 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
637 Uart
.state
= STATE_UNSYNCD
;
639 // And put the FPGA in the appropriate mode
640 // Signal field is off with the appropriate LED
642 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A
| FPGA_HF_ISO14443A_SNIFFER
);
643 SetAdcMuxFor(GPIO_MUXSEL_HIPKD
);
645 uint32_t time_0
= GetCountSspClk();
646 uint32_t time_start
= 0;
647 uint32_t time_stop
= 0;
654 // And now we loop, receiving samples.
658 int behindBy
= (lastRxCounter
- AT91C_BASE_PDC_SSC
->PDC_RCR
) & (DMA_BUFFER_SIZE
-1);
659 if (behindBy
> maxBehindBy
) {
660 maxBehindBy
= behindBy
;
661 if (behindBy
> (9 * DMA_BUFFER_SIZE
/ 10)) {
662 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy
);
666 if (behindBy
< 1) continue;
672 if (upTo
- dmaBuf
> DMA_BUFFER_SIZE
) {
673 upTo
-= DMA_BUFFER_SIZE
;
674 lastRxCounter
+= DMA_BUFFER_SIZE
;
675 AT91C_BASE_PDC_SSC
->PDC_RNPR
= (uint32_t) upTo
;
676 AT91C_BASE_PDC_SSC
->PDC_RNCR
= DMA_BUFFER_SIZE
;
683 decbyte
^= (1 << (3 - div
));
686 // FOR READER SIDE COMMUMICATION...
689 decbyter
^= (smpl
& 0x30);
693 if ((div
+ 1) % 2 == 0) {
695 if (OutOfNDecoding((smpl
& 0xF0) >> 4)) {
696 rsamples
= samples
- Uart
.samples
;
697 time_stop
= (GetCountSspClk()-time_0
) << 4;
700 //if (!LogTrace(Uart.output, Uart.byteCnt, rsamples, Uart.parityBits,true)) break;
701 //if (!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, true)) break;
702 uint8_t parity
[MAX_PARITY_SIZE
];
703 GetParity(Uart
.output
, Uart
.byteCnt
, parity
);
704 LogTrace_ISO15693(Uart
.output
, Uart
.byteCnt
, time_start
*32, time_stop
*32, parity
, true);
706 /* And ready to receive another command. */
707 Uart
.state
= STATE_UNSYNCD
;
708 /* And also reset the demod code, which might have been */
709 /* false-triggered by the commands from the reader. */
710 Demod
.state
= DEMOD_UNSYNCD
;
714 time_start
= (GetCountSspClk()-time_0
) << 4;
721 if (ManchesterDecoding(smpl
& 0x0F)) {
722 time_stop
= (GetCountSspClk()-time_0
) << 4;
724 rsamples
= samples
- Demod
.samples
;
727 uint8_t parity
[MAX_PARITY_SIZE
];
728 GetParity(Demod
.output
, Demod
.len
, parity
);
729 LogTrace_ISO15693(Demod
.output
, Demod
.len
, time_start
*32, time_stop
*32, parity
, false);
731 // And ready to receive another response.
732 memset(&Demod
, 0, sizeof(Demod
));
733 Demod
.output
= tagToReaderResponse
;
734 Demod
.state
= DEMOD_UNSYNCD
;
737 time_start
= (GetCountSspClk()-time_0
) << 4;
744 if (BUTTON_PRESS()) {
745 DbpString("cancelled_a");
750 DbpString("COMMAND FINISHED");
752 Dbprintf("%x %x %x", maxBehindBy
, Uart
.state
, Uart
.byteCnt
);
753 Dbprintf("%x %x %x", Uart
.byteCntMax
, BigBuf_get_traceLen(), (int)Uart
.output
[0]);
756 AT91C_BASE_PDC_SSC
->PDC_PTCR
= AT91C_PDC_RXTDIS
;
757 Dbprintf("%x %x %x", maxBehindBy
, Uart
.state
, Uart
.byteCnt
);
758 Dbprintf("%x %x %x", Uart
.byteCntMax
, BigBuf_get_traceLen(), (int)Uart
.output
[0]);
762 void rotateCSN(uint8_t* originalCSN
, uint8_t* rotatedCSN
) {
764 for (i
= 0; i
< 8; i
++) {
765 rotatedCSN
[i
] = (originalCSN
[i
] >> 3) | (originalCSN
[(i
+1)%8] << 5);
770 static void CodeIClassTagSOF() {
772 ToSend
[++ToSendMax
] = 0x1D;
776 static void AppendCrc(uint8_t *data
, int len
) {
777 ComputeCrc14443(CRC_ICLASS
, data
, len
, data
+len
, data
+len
+1);
782 * @brief Does the actual simulation
784 int doIClassSimulation(int simulationMode
, uint8_t *reader_mac_buf
) {
786 // free eventually allocated BigBuf memory
787 BigBuf_free_keep_EM();
789 uint16_t page_size
= 32 * 8;
790 uint8_t current_page
= 0;
792 // maintain cipher states for both credit and debit key for each page
793 State cipher_state_KC
[8];
794 State cipher_state_KD
[8];
795 State
*cipher_state
= &cipher_state_KD
[0];
797 uint8_t *emulator
= BigBuf_get_EM_addr();
798 uint8_t *csn
= emulator
;
800 // CSN followed by two CRC bytes
801 uint8_t anticoll_data
[10];
802 uint8_t csn_data
[10];
803 memcpy(csn_data
, csn
, sizeof(csn_data
));
804 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]);
806 // Construct anticollision-CSN
807 rotateCSN(csn_data
, anticoll_data
);
809 // Compute CRC on both CSNs
810 AppendCrc(anticoll_data
, 8);
811 AppendCrc(csn_data
, 8);
813 uint8_t diversified_key_d
[8] = { 0x00 };
814 uint8_t diversified_key_c
[8] = { 0x00 };
815 uint8_t *diversified_key
= diversified_key_d
;
817 // configuration block
818 uint8_t conf_block
[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00};
821 uint8_t card_challenge_data
[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
823 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
824 // initialize from page 0
825 memcpy(conf_block
, emulator
+ 8 * 1, 8);
826 memcpy(card_challenge_data
, emulator
+ 8 * 2, 8); // e-purse
827 memcpy(diversified_key_d
, emulator
+ 8 * 3, 8); // Kd
828 memcpy(diversified_key_c
, emulator
+ 8 * 4, 8); // Kc
831 AppendCrc(conf_block
, 8);
833 // save card challenge for sim2,4 attack
834 if (reader_mac_buf
!= NULL
) {
835 memcpy(reader_mac_buf
, card_challenge_data
, 8);
838 if (conf_block
[5] & 0x80) {
843 // When the page is in personalization mode this bit is equal to 1.
844 // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0:
845 // the page is then "in application mode".
846 bool personalization_mode
= conf_block
[7] & 0x80;
848 // chip memory may be divided in 8 pages
849 uint8_t max_page
= conf_block
[4] & 0x10 ? 0 : 7;
851 // Precalculate the cipher states, feeding it the CC
852 cipher_state_KD
[0] = opt_doTagMAC_1(card_challenge_data
, diversified_key_d
);
853 cipher_state_KC
[0] = opt_doTagMAC_1(card_challenge_data
, diversified_key_c
);
854 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
855 for (int i
= 1; i
< max_page
; i
++) {
856 uint8_t *epurse
= emulator
+ i
*page_size
+ 8*2;
857 uint8_t *Kd
= emulator
+ i
*page_size
+ 8*3;
858 uint8_t *Kc
= emulator
+ i
*page_size
+ 8*4;
859 cipher_state_KD
[i
] = opt_doTagMAC_1(epurse
, Kd
);
860 cipher_state_KC
[i
] = opt_doTagMAC_1(epurse
, Kc
);
869 // Reader 81 anticoll. CSN
872 uint8_t *modulated_response
;
873 int modulated_response_size
= 0;
874 uint8_t *trace_data
= NULL
;
875 int trace_data_size
= 0;
877 // Respond SOF -- takes 1 bytes
878 uint8_t *resp_sof
= BigBuf_malloc(1);
881 // Anticollision CSN (rotated CSN)
882 // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
883 uint8_t *resp_anticoll
= BigBuf_malloc(22);
884 int resp_anticoll_len
;
887 // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
888 uint8_t *resp_csn
= BigBuf_malloc(22);
891 // configuration (block 1) picopass 2ks
892 uint8_t *resp_conf
= BigBuf_malloc(22);
896 // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
897 uint8_t *resp_cc
= BigBuf_malloc(18);
900 // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only
901 uint8_t *resp_ff
= BigBuf_malloc(22);
903 uint8_t ff_data
[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
904 AppendCrc(ff_data
, 8);
906 // Application Issuer Area (block 5)
907 uint8_t *resp_aia
= BigBuf_malloc(22);
909 uint8_t aia_data
[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
910 AppendCrc(aia_data
, 8);
912 uint8_t *receivedCmd
= BigBuf_malloc(MAX_FRAME_SIZE
);
915 // Prepare card messages
917 // First card answer: SOF only
919 memcpy(resp_sof
, ToSend
, ToSendMax
);
920 resp_sof_Len
= ToSendMax
;
923 CodeIso15693AsTag(anticoll_data
, sizeof(anticoll_data
));
924 memcpy(resp_anticoll
, ToSend
, ToSendMax
);
925 resp_anticoll_len
= ToSendMax
;
928 CodeIso15693AsTag(csn_data
, sizeof(csn_data
));
929 memcpy(resp_csn
, ToSend
, ToSendMax
);
930 resp_csn_len
= ToSendMax
;
932 // Configuration (block 1)
933 CodeIso15693AsTag(conf_block
, sizeof(conf_block
));
934 memcpy(resp_conf
, ToSend
, ToSendMax
);
935 resp_conf_len
= ToSendMax
;
938 CodeIso15693AsTag(card_challenge_data
, sizeof(card_challenge_data
));
939 memcpy(resp_cc
, ToSend
, ToSendMax
);
940 resp_cc_len
= ToSendMax
;
942 // Kd, Kc (blocks 3 and 4)
943 CodeIso15693AsTag(ff_data
, sizeof(ff_data
));
944 memcpy(resp_ff
, ToSend
, ToSendMax
);
945 resp_ff_len
= ToSendMax
;
947 // Application Issuer Area (block 5)
948 CodeIso15693AsTag(aia_data
, sizeof(aia_data
));
949 memcpy(resp_aia
, ToSend
, ToSendMax
);
950 resp_aia_len
= ToSendMax
;
952 //This is used for responding to READ-block commands or other data which is dynamically generated
953 uint8_t *data_generic_trace
= BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer
954 uint8_t *data_response
= BigBuf_malloc( (32 + 2) * 2 + 2);
956 bool buttonPressed
= false;
957 enum { IDLE
, ACTIVATED
, SELECTED
, HALTED
} chip_state
= IDLE
;
962 uint32_t reader_eof_time
= 0;
963 len
= GetIso15693CommandFromReader(receivedCmd
, MAX_FRAME_SIZE
, &reader_eof_time
);
965 buttonPressed
= true;
969 // Now look at the reader command and provide appropriate responses
970 // default is no response:
971 modulated_response
= NULL
;
972 modulated_response_size
= 0;
976 if (receivedCmd
[0] == ICLASS_CMD_ACTALL
&& len
== 1) {
977 // Reader in anticollision phase
978 if (chip_state
!= HALTED
) {
979 modulated_response
= resp_sof
;
980 modulated_response_size
= resp_sof_Len
;
981 chip_state
= ACTIVATED
;
984 } else if (receivedCmd
[0] == ICLASS_CMD_READ_OR_IDENTIFY
&& len
== 1) { // identify
985 // Reader asks for anticollision CSN
986 if (chip_state
== SELECTED
|| chip_state
== ACTIVATED
) {
987 modulated_response
= resp_anticoll
;
988 modulated_response_size
= resp_anticoll_len
;
989 trace_data
= anticoll_data
;
990 trace_data_size
= sizeof(anticoll_data
);
993 } else if (receivedCmd
[0] == ICLASS_CMD_SELECT
&& len
== 9) {
994 // Reader selects anticollision CSN.
995 // Tag sends the corresponding real CSN
996 if (chip_state
== ACTIVATED
|| chip_state
== SELECTED
) {
997 if (!memcmp(receivedCmd
+1, anticoll_data
, 8)) {
998 modulated_response
= resp_csn
;
999 modulated_response_size
= resp_csn_len
;
1000 trace_data
= csn_data
;
1001 trace_data_size
= sizeof(csn_data
);
1002 chip_state
= SELECTED
;
1006 } else if (chip_state
== HALTED
) {
1007 // RESELECT with CSN
1008 if (!memcmp(receivedCmd
+1, csn_data
, 8)) {
1009 modulated_response
= resp_csn
;
1010 modulated_response_size
= resp_csn_len
;
1011 trace_data
= csn_data
;
1012 trace_data_size
= sizeof(csn_data
);
1013 chip_state
= SELECTED
;
1017 } else if (receivedCmd
[0] == ICLASS_CMD_READ_OR_IDENTIFY
&& len
== 4) { // read block
1018 uint16_t blockNo
= receivedCmd
[1];
1019 if (chip_state
== SELECTED
) {
1020 if (simulationMode
== ICLASS_SIM_MODE_EXIT_AFTER_MAC
) {
1021 // provide defaults for blocks 0 ... 5
1023 case 0: // csn (block 00)
1024 modulated_response
= resp_csn
;
1025 modulated_response_size
= resp_csn_len
;
1026 trace_data
= csn_data
;
1027 trace_data_size
= sizeof(csn_data
);
1029 case 1: // configuration (block 01)
1030 modulated_response
= resp_conf
;
1031 modulated_response_size
= resp_conf_len
;
1032 trace_data
= conf_block
;
1033 trace_data_size
= sizeof(conf_block
);
1035 case 2: // e-purse (block 02)
1036 modulated_response
= resp_cc
;
1037 modulated_response_size
= resp_cc_len
;
1038 trace_data
= card_challenge_data
;
1039 trace_data_size
= sizeof(card_challenge_data
);
1040 // set epurse of sim2,4 attack
1041 if (reader_mac_buf
!= NULL
) {
1042 memcpy(reader_mac_buf
, card_challenge_data
, 8);
1046 case 4: // Kd, Kc, always respond with 0xff bytes
1047 modulated_response
= resp_ff
;
1048 modulated_response_size
= resp_ff_len
;
1049 trace_data
= ff_data
;
1050 trace_data_size
= sizeof(ff_data
);
1052 case 5: // Application Issuer Area (block 05)
1053 modulated_response
= resp_aia
;
1054 modulated_response_size
= resp_aia_len
;
1055 trace_data
= aia_data
;
1056 trace_data_size
= sizeof(aia_data
);
1058 // default: don't respond
1060 } else if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1061 if (blockNo
== 3 || blockNo
== 4) { // Kd, Kc, always respond with 0xff bytes
1062 modulated_response
= resp_ff
;
1063 modulated_response_size
= resp_ff_len
;
1064 trace_data
= ff_data
;
1065 trace_data_size
= sizeof(ff_data
);
1066 } else { // use data from emulator memory
1067 memcpy(data_generic_trace
, emulator
+ current_page
*page_size
+ 8*blockNo
, 8);
1068 AppendCrc(data_generic_trace
, 8);
1069 trace_data
= data_generic_trace
;
1070 trace_data_size
= 10;
1071 CodeIso15693AsTag(trace_data
, trace_data_size
);
1072 memcpy(data_response
, ToSend
, ToSendMax
);
1073 modulated_response
= data_response
;
1074 modulated_response_size
= ToSendMax
;
1079 } else if ((receivedCmd
[0] == ICLASS_CMD_READCHECK_KD
1080 || receivedCmd
[0] == ICLASS_CMD_READCHECK_KC
) && receivedCmd
[1] == 0x02 && len
== 2) {
1081 // Read e-purse (88 02 || 18 02)
1082 if (chip_state
== SELECTED
) {
1083 if(receivedCmd
[0] == ICLASS_CMD_READCHECK_KD
){
1084 cipher_state
= &cipher_state_KD
[current_page
];
1085 diversified_key
= diversified_key_d
;
1087 cipher_state
= &cipher_state_KC
[current_page
];
1088 diversified_key
= diversified_key_c
;
1090 modulated_response
= resp_cc
;
1091 modulated_response_size
= resp_cc_len
;
1092 trace_data
= card_challenge_data
;
1093 trace_data_size
= sizeof(card_challenge_data
);
1096 } else if ((receivedCmd
[0] == ICLASS_CMD_CHECK_KC
1097 || receivedCmd
[0] == ICLASS_CMD_CHECK_KD
) && len
== 9) {
1098 // Reader random and reader MAC!!!
1099 if (chip_state
== SELECTED
) {
1100 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1101 //NR, from reader, is in receivedCmd+1
1102 opt_doTagMAC_2(*cipher_state
, receivedCmd
+1, data_generic_trace
, diversified_key
);
1103 trace_data
= data_generic_trace
;
1104 trace_data_size
= 4;
1105 CodeIso15693AsTag(trace_data
, trace_data_size
);
1106 memcpy(data_response
, ToSend
, ToSendMax
);
1107 modulated_response
= data_response
;
1108 modulated_response_size
= ToSendMax
;
1110 } else { // Not fullsim, we don't respond
1111 // We do not know what to answer, so lets keep quiet
1112 if (simulationMode
== ICLASS_SIM_MODE_EXIT_AFTER_MAC
) {
1113 if (reader_mac_buf
!= NULL
) {
1114 // save NR and MAC for sim 2,4
1115 memcpy(reader_mac_buf
+ 8, receivedCmd
+ 1, 8);
1122 } else if (receivedCmd
[0] == ICLASS_CMD_HALT
&& len
== 1) {
1123 if (chip_state
== SELECTED
) {
1124 // Reader ends the session
1125 modulated_response
= resp_sof
;
1126 modulated_response_size
= resp_sof_Len
;
1127 chip_state
= HALTED
;
1130 } else if (simulationMode
== ICLASS_SIM_MODE_FULL
&& receivedCmd
[0] == ICLASS_CMD_READ4
&& len
== 4) { // 0x06
1132 if (chip_state
== SELECTED
) {
1133 uint8_t blockNo
= receivedCmd
[1];
1134 memcpy(data_generic_trace
, emulator
+ current_page
*page_size
+ blockNo
*8, 8 * 4);
1135 AppendCrc(data_generic_trace
, 8 * 4);
1136 trace_data
= data_generic_trace
;
1137 trace_data_size
= 8 * 4 + 2;
1138 CodeIso15693AsTag(trace_data
, trace_data_size
);
1139 memcpy(data_response
, ToSend
, ToSendMax
);
1140 modulated_response
= data_response
;
1141 modulated_response_size
= ToSendMax
;
1144 } else if (receivedCmd
[0] == ICLASS_CMD_UPDATE
&& (len
== 12 || len
== 14)) {
1145 // We're expected to respond with the data+crc, exactly what's already in the receivedCmd
1146 // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b
1147 if (chip_state
== SELECTED
) {
1148 uint8_t blockNo
= receivedCmd
[1];
1149 if (blockNo
== 2) { // update e-purse
1150 memcpy(card_challenge_data
, receivedCmd
+2, 8);
1151 CodeIso15693AsTag(card_challenge_data
, sizeof(card_challenge_data
));
1152 memcpy(resp_cc
, ToSend
, ToSendMax
);
1153 resp_cc_len
= ToSendMax
;
1154 cipher_state_KD
[current_page
] = opt_doTagMAC_1(card_challenge_data
, diversified_key_d
);
1155 cipher_state_KC
[current_page
] = opt_doTagMAC_1(card_challenge_data
, diversified_key_c
);
1156 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1157 memcpy(emulator
+ current_page
*page_size
+ 8*2, card_challenge_data
, 8);
1159 } else if (blockNo
== 3) { // update Kd
1160 for (int i
= 0; i
< 8; i
++) {
1161 if (personalization_mode
) {
1162 diversified_key_d
[i
] = receivedCmd
[2 + i
];
1164 diversified_key_d
[i
] ^= receivedCmd
[2 + i
];
1167 cipher_state_KD
[current_page
] = opt_doTagMAC_1(card_challenge_data
, diversified_key_d
);
1168 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1169 memcpy(emulator
+ current_page
*page_size
+ 8*3, diversified_key_d
, 8);
1171 } else if (blockNo
== 4) { // update Kc
1172 for (int i
= 0; i
< 8; i
++) {
1173 if (personalization_mode
) {
1174 diversified_key_c
[i
] = receivedCmd
[2 + i
];
1176 diversified_key_c
[i
] ^= receivedCmd
[2 + i
];
1179 cipher_state_KC
[current_page
] = opt_doTagMAC_1(card_challenge_data
, diversified_key_c
);
1180 if (simulationMode
== ICLASS_SIM_MODE_FULL
) {
1181 memcpy(emulator
+ current_page
*page_size
+ 8*4, diversified_key_c
, 8);
1183 } else if (simulationMode
== ICLASS_SIM_MODE_FULL
) { // update any other data block
1184 memcpy(emulator
+ current_page
*page_size
+ 8*blockNo
, receivedCmd
+2, 8);
1186 memcpy(data_generic_trace
, receivedCmd
+ 2, 8);
1187 AppendCrc(data_generic_trace
, 8);
1188 trace_data
= data_generic_trace
;
1189 trace_data_size
= 10;
1190 CodeIso15693AsTag(trace_data
, trace_data_size
);
1191 memcpy(data_response
, ToSend
, ToSendMax
);
1192 modulated_response
= data_response
;
1193 modulated_response_size
= ToSendMax
;
1196 } else if (receivedCmd
[0] == ICLASS_CMD_PAGESEL
&& len
== 4) {
1198 // Chips with a single page will not answer to this command
1199 // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC
1200 if (chip_state
== SELECTED
) {
1201 if (simulationMode
== ICLASS_SIM_MODE_FULL
&& max_page
> 0) {
1202 current_page
= receivedCmd
[1];
1203 memcpy(data_generic_trace
, emulator
+ current_page
*page_size
+ 8*1, 8);
1204 memcpy(diversified_key_d
, emulator
+ current_page
*page_size
+ 8*3, 8);
1205 memcpy(diversified_key_c
, emulator
+ current_page
*page_size
+ 8*4, 8);
1206 cipher_state
= &cipher_state_KD
[current_page
];
1207 personalization_mode
= data_generic_trace
[7] & 0x80;
1208 AppendCrc(data_generic_trace
, 8);
1209 trace_data
= data_generic_trace
;
1210 trace_data_size
= 10;
1211 CodeIso15693AsTag(trace_data
, trace_data_size
);
1212 memcpy(data_response
, ToSend
, ToSendMax
);
1213 modulated_response
= data_response
;
1214 modulated_response_size
= ToSendMax
;
1218 } else if (receivedCmd
[0] == 0x26 && len
== 5) {
1219 // standard ISO15693 INVENTORY command. Ignore.
1222 // don't know how to handle this command
1223 char debug_message
[250]; // should be enough
1224 sprintf(debug_message
, "Unhandled command (len = %d) received from reader:", len
);
1225 for (int i
= 0; i
< len
&& strlen(debug_message
) < sizeof(debug_message
) - 3 - 1; i
++) {
1226 sprintf(debug_message
+ strlen(debug_message
), " %02x", receivedCmd
[i
]);
1228 Dbprintf("%s", debug_message
);
1233 A legit tag has about 273,4us delay between reader EOT and tag SOF.
1235 if (modulated_response_size
> 0) {
1236 uint32_t response_time
= reader_eof_time
+ DELAY_ICLASS_VCD_TO_VICC_SIM
;
1237 TransmitTo15693Reader(modulated_response
, modulated_response_size
, &response_time
, 0, false);
1238 LogTrace_ISO15693(trace_data
, trace_data_size
, response_time
*32, response_time
*32 + modulated_response_size
/2, NULL
, false);
1245 DbpString("Button pressed");
1247 return buttonPressed
;
1251 * @brief SimulateIClass simulates an iClass card.
1252 * @param arg0 type of simulation
1253 * - 0 uses the first 8 bytes in usb data as CSN
1254 * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified
1255 * in the usb data. This mode collects MAC from the reader, in order to do an offline
1256 * attack on the keys. For more info, see "dismantling iclass" and proxclone.com.
1257 * - Other : Uses the default CSN (031fec8af7ff12e0)
1258 * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only)
1262 void SimulateIClass(uint32_t arg0
, uint32_t arg1
, uint32_t arg2
, uint8_t *datain
) {
1266 uint32_t simType
= arg0
;
1267 uint32_t numberOfCSNS
= arg1
;
1269 // setup hardware for simulation:
1270 FpgaDownloadAndGo(FPGA_BITSTREAM_HF
);
1271 SetAdcMuxFor(GPIO_MUXSEL_HIPKD
);
1272 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR
| FPGA_HF_SIMULATOR_NO_MODULATION
);
1274 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR
);
1277 // Enable and clear the trace
1280 //Use the emulator memory for SIM
1281 uint8_t *emulator
= BigBuf_get_EM_addr();
1283 if (simType
== ICLASS_SIM_MODE_CSN
) {
1284 // Use the CSN from commandline
1285 memcpy(emulator
, datain
, 8);
1286 doIClassSimulation(ICLASS_SIM_MODE_CSN
, NULL
);
1287 } else if (simType
== ICLASS_SIM_MODE_CSN_DEFAULT
) {
1289 uint8_t csn_crc
[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
1290 // Use the CSN from commandline
1291 memcpy(emulator
, csn_crc
, 8);
1292 doIClassSimulation(ICLASS_SIM_MODE_CSN
, NULL
);
1293 } else if (simType
== ICLASS_SIM_MODE_READER_ATTACK
) {
1294 uint8_t mac_responses
[USB_CMD_DATA_SIZE
] = { 0 };
1295 Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS
);
1296 // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
1297 // in order to collect MAC's from the reader. This can later be used in an offline-attack
1298 // in order to obtain the keys, as in the "dismantling iclass"-paper.
1300 for (i
= 0; i
< numberOfCSNS
&& i
*16+16 <= USB_CMD_DATA_SIZE
; i
++) {
1301 // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response).
1302 memcpy(emulator
, datain
+(i
*8), 8);
1303 if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC
, mac_responses
+i
*16)) {
1307 Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
1308 datain
[i
*8+0], datain
[i
*8+1], datain
[i
*8+2], datain
[i
*8+3],
1309 datain
[i
*8+4], datain
[i
*8+5], datain
[i
*8+6], datain
[i
*8+7]);
1310 Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x",
1311 mac_responses
[i
*16+ 8], mac_responses
[i
*16+ 9], mac_responses
[i
*16+10], mac_responses
[i
*16+11],
1312 mac_responses
[i
*16+12], mac_responses
[i
*16+13], mac_responses
[i
*16+14], mac_responses
[i
*16+15]);
1313 SpinDelay(100); // give the reader some time to prepare for next CSN
1315 cmd_send(CMD_ACK
, CMD_SIMULATE_TAG_ICLASS
, i
, 0, mac_responses
, i
*16);
1316 } else if (simType
== ICLASS_SIM_MODE_FULL
) {
1317 //This is 'full sim' mode, where we use the emulator storage for data.
1318 doIClassSimulation(ICLASS_SIM_MODE_FULL
, NULL
);
1320 // We may want a mode here where we hardcode the csns to use (from proxclone).
1321 // That will speed things up a little, but not required just yet.
1322 Dbprintf("The mode is not implemented, reserved for future use");
1325 Dbprintf("Done...");
1333 static void ReaderTransmitIClass(uint8_t *frame
, int len
, uint32_t *start_time
) {
1335 CodeIso15693AsReader(frame
, len
);
1337 TransmitTo15693Tag(ToSend
, ToSendMax
, start_time
);
1339 uint32_t end_time
= *start_time
+ 32*(8*ToSendMax
-4); // substract the 4 padding bits after EOF
1340 LogTrace_ISO15693(frame
, len
, *start_time
*4, end_time
*4, NULL
, true);
1344 static bool sendCmdGetResponseWithRetries(uint8_t* command
, size_t cmdsize
, uint8_t* resp
, size_t max_resp_size
,
1345 uint8_t expected_size
, uint8_t retries
, uint32_t start_time
, uint32_t *eof_time
) {
1346 while (retries
-- > 0) {
1347 ReaderTransmitIClass(command
, cmdsize
, &start_time
);
1348 if (expected_size
== GetIso15693AnswerFromTag(resp
, max_resp_size
, ICLASS_READER_TIMEOUT_OTHERS
, eof_time
)) {
1352 return false;//Error
1356 * @brief Talks to an iclass tag, sends the commands to get CSN and CC.
1357 * @param card_data where the CSN and CC are stored for return
1360 * 2 = Got CSN and CC
1362 static uint8_t handshakeIclassTag_ext(uint8_t *card_data
, bool use_credit_key
, uint32_t *eof_time
) {
1363 uint8_t act_all
[] = { 0x0a };
1364 uint8_t identify
[] = { 0x0c };
1365 uint8_t select
[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1366 uint8_t readcheck_cc
[] = { 0x88, 0x02 };
1368 readcheck_cc
[0] = 0x18;
1370 readcheck_cc
[0] = 0x88;
1372 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1374 uint8_t read_status
= 0;
1375 uint32_t start_time
= GetCountSspClk();
1378 ReaderTransmitIClass(act_all
, 1, &start_time
);
1380 if (GetIso15693AnswerFromTag(resp
, sizeof(resp
), ICLASS_READER_TIMEOUT_ACTALL
, eof_time
) < 0) return read_status
;//Fail
1383 start_time
= *eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1384 ReaderTransmitIClass(identify
, 1, &start_time
);
1385 // FpgaDisableTracing(); // DEBUGGING
1386 //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
1387 uint8_t len
= GetIso15693AnswerFromTag(resp
, sizeof(resp
), ICLASS_READER_TIMEOUT_OTHERS
, eof_time
);
1388 if (len
!= 10) return read_status
;//Fail
1390 //Copy the Anti-collision CSN to our select-packet
1391 memcpy(&select
[1], resp
, 8);
1393 start_time
= *eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1394 ReaderTransmitIClass(select
, sizeof(select
), &start_time
);
1395 //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
1396 len
= GetIso15693AnswerFromTag(resp
, sizeof(resp
), ICLASS_READER_TIMEOUT_OTHERS
, eof_time
);
1397 if (len
!= 10) return read_status
;//Fail
1399 //Success - level 1, we got CSN
1400 //Save CSN in response data
1401 memcpy(card_data
, resp
, 8);
1403 //Flag that we got to at least stage 1, read CSN
1406 // Card selected, now read e-purse (cc) (only 8 bytes no CRC)
1407 start_time
= *eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1408 ReaderTransmitIClass(readcheck_cc
, sizeof(readcheck_cc
), &start_time
);
1409 if (GetIso15693AnswerFromTag(resp
, sizeof(resp
), ICLASS_READER_TIMEOUT_OTHERS
, eof_time
) == 8) {
1410 //Save CC (e-purse) in response data
1411 memcpy(card_data
+8, resp
, 8);
1418 static uint8_t handshakeIclassTag(uint8_t *card_data
, uint32_t *eof_time
) {
1419 return handshakeIclassTag_ext(card_data
, false, eof_time
);
1423 // Reader iClass Anticollission
1424 void ReaderIClass(uint8_t arg0
) {
1426 uint8_t card_data
[6 * 8] = {0};
1427 memset(card_data
, 0xFF, sizeof(card_data
));
1428 uint8_t last_csn
[8] = {0,0,0,0,0,0,0,0};
1429 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1430 memset(resp
, 0xFF, sizeof(resp
));
1431 //Read conf block CRC(0x01) => 0xfa 0x22
1432 uint8_t readConf
[] = { ICLASS_CMD_READ_OR_IDENTIFY
, 0x01, 0xfa, 0x22};
1433 //Read App Issuer Area block CRC(0x05) => 0xde 0x64
1434 uint8_t readAA
[] = { ICLASS_CMD_READ_OR_IDENTIFY
, 0x05, 0xde, 0x64};
1437 uint8_t result_status
= 0;
1438 // flag to read until one tag is found successfully
1439 bool abort_after_read
= arg0
& FLAG_ICLASS_READER_ONLY_ONCE
;
1440 // flag to only try 5 times to find one tag then return
1441 bool try_once
= arg0
& FLAG_ICLASS_READER_ONE_TRY
;
1442 // if neither abort_after_read nor try_once then continue reading until button pressed.
1444 bool use_credit_key
= arg0
& FLAG_ICLASS_READER_CEDITKEY
;
1445 // test flags for what blocks to be sure to read
1446 uint8_t flagReadConfig
= arg0
& FLAG_ICLASS_READER_CONF
;
1447 uint8_t flagReadCC
= arg0
& FLAG_ICLASS_READER_CC
;
1448 uint8_t flagReadAA
= arg0
& FLAG_ICLASS_READER_AA
;
1452 Iso15693InitReader();
1455 uint32_t start_time
= 0;
1456 uint32_t eof_time
= 0;
1458 uint16_t tryCnt
= 0;
1459 bool userCancelled
= BUTTON_PRESS() || usb_poll_validate_length();
1460 while (!userCancelled
) {
1461 // if only looking for one card try 2 times if we missed it the first time
1462 if (try_once
&& tryCnt
> 2) {
1466 if (!get_tracing()) {
1467 DbpString("Trace full");
1472 read_status
= handshakeIclassTag_ext(card_data
, use_credit_key
, &eof_time
);
1474 if (read_status
== 0) continue;
1475 if (read_status
== 1) result_status
= FLAG_ICLASS_READER_CSN
;
1476 if (read_status
== 2) result_status
= FLAG_ICLASS_READER_CSN
| FLAG_ICLASS_READER_CC
;
1478 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1479 // handshakeIclass returns CSN|CC, but the actual block
1480 // layout is CSN|CONFIG|CC, so here we reorder the data,
1481 // moving CC forward 8 bytes
1482 memcpy(card_data
+16, card_data
+8, 8);
1483 //Read block 1, config
1484 if (flagReadConfig
) {
1485 if (sendCmdGetResponseWithRetries(readConf
, sizeof(readConf
), resp
, sizeof(resp
), 10, 10, start_time
, &eof_time
)) {
1486 result_status
|= FLAG_ICLASS_READER_CONF
;
1487 memcpy(card_data
+8, resp
, 8);
1489 Dbprintf("Failed to dump config block");
1491 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1496 if (sendCmdGetResponseWithRetries(readAA
, sizeof(readAA
), resp
, sizeof(resp
), 10, 10, start_time
, &eof_time
)) {
1497 result_status
|= FLAG_ICLASS_READER_AA
;
1498 memcpy(card_data
+ (8*5), resp
, 8);
1500 //Dbprintf("Failed to dump AA block");
1505 // 1 : Configuration
1507 // 3 : kd / debit / aa2 (write-only)
1508 // 4 : kc / credit / aa1 (write-only)
1509 // 5 : AIA, Application issuer area
1510 //Then we can 'ship' back the 6 * 8 bytes of data,
1511 // with 0xFF:s in block 3 and 4.
1514 //Send back to client, but don't bother if we already sent this -
1515 // only useful if looping in arm (not try_once && not abort_after_read)
1516 if (memcmp(last_csn
, card_data
, 8) != 0) {
1517 // If caller requires that we get Conf, CC, AA, continue until we got it
1518 if ( (result_status
^ FLAG_ICLASS_READER_CSN
^ flagReadConfig
^ flagReadCC
^ flagReadAA
) == 0) {
1519 cmd_send(CMD_ACK
, result_status
, 0, 0, card_data
, sizeof(card_data
));
1520 if (abort_after_read
) {
1521 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1526 //Save that we already sent this....
1527 memcpy(last_csn
, card_data
, 8);
1532 userCancelled
= BUTTON_PRESS() || usb_poll_validate_length();
1534 if (userCancelled
) {
1535 cmd_send(CMD_ACK
, 0xFF, 0, 0, card_data
, 0);
1537 cmd_send(CMD_ACK
, 0, 0, 0, card_data
, 0);
1542 void ReaderIClass_Replay(uint8_t arg0
, uint8_t *MAC
) {
1544 uint8_t card_data
[USB_CMD_DATA_SIZE
]={0};
1545 uint16_t block_crc_LUT
[255] = {0};
1547 //Generate a lookup table for block crc
1548 for (int block
= 0; block
< 255; block
++){
1550 block_crc_LUT
[block
] = iclass_crc16(&bl
,1);
1552 //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]);
1554 uint8_t check
[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1555 uint8_t read
[] = { 0x0c, 0x00, 0x00, 0x00 };
1558 uint8_t cardsize
= 0;
1561 static struct memory_t
{
1569 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1573 Iso15693InitReader();
1576 uint32_t start_time
= 0;
1577 uint32_t eof_time
= 0;
1579 while (!BUTTON_PRESS()) {
1583 if (!get_tracing()) {
1584 DbpString("Trace full");
1588 uint8_t read_status
= handshakeIclassTag(card_data
, &eof_time
);
1589 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1591 if (read_status
< 2) continue;
1593 //for now replay captured auth (as cc not updated)
1594 memcpy(check
+5, MAC
, 4);
1596 if (!sendCmdGetResponseWithRetries(check
, sizeof(check
), resp
, sizeof(resp
), 4, 5, start_time
, &eof_time
)) {
1597 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1598 Dbprintf("Error: Authentication Fail!");
1602 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1603 //first get configuration block (block 1)
1604 crc
= block_crc_LUT
[1];
1607 read
[3] = crc
& 0xff;
1609 if (!sendCmdGetResponseWithRetries(read
, sizeof(read
), resp
, sizeof(resp
), 10, 10, start_time
, &eof_time
)) {
1610 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1611 Dbprintf("Dump config (block 1) failed");
1615 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1617 memory
.k16
= (mem
& 0x80);
1618 memory
.book
= (mem
& 0x20);
1619 memory
.k2
= (mem
& 0x8);
1620 memory
.lockauth
= (mem
& 0x2);
1621 memory
.keyaccess
= (mem
& 0x1);
1623 cardsize
= memory
.k16
? 255 : 32;
1625 //Set card_data to all zeroes, we'll fill it with data
1626 memset(card_data
, 0x0, USB_CMD_DATA_SIZE
);
1627 uint8_t failedRead
= 0;
1628 uint32_t stored_data_length
= 0;
1629 //then loop around remaining blocks
1630 for (int block
= 0; block
< cardsize
; block
++) {
1632 crc
= block_crc_LUT
[block
];
1634 read
[3] = crc
& 0xff;
1636 if (sendCmdGetResponseWithRetries(read
, sizeof(read
), resp
, sizeof(resp
), 10, 10, start_time
, &eof_time
)) {
1637 start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1638 Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
1639 block
, resp
[0], resp
[1], resp
[2],
1640 resp
[3], resp
[4], resp
[5],
1643 //Fill up the buffer
1644 memcpy(card_data
+stored_data_length
, resp
, 8);
1645 stored_data_length
+= 8;
1646 if (stored_data_length
+8 > USB_CMD_DATA_SIZE
) {
1647 //Time to send this off and start afresh
1649 stored_data_length
,//data length
1650 failedRead
,//Failed blocks?
1652 card_data
, stored_data_length
);
1654 stored_data_length
= 0;
1660 stored_data_length
+= 8;//Otherwise, data becomes misaligned
1661 Dbprintf("Failed to dump block %d", block
);
1665 //Send off any remaining data
1666 if (stored_data_length
> 0) {
1668 stored_data_length
,//data length
1669 failedRead
,//Failed blocks?
1672 stored_data_length
);
1674 //If we got here, let's break
1677 //Signal end of transmission
1685 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1689 void iClass_Authentication(uint8_t *MAC
) {
1690 uint8_t check
[] = { ICLASS_CMD_CHECK_KD
, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1691 uint8_t resp
[ICLASS_BUFFER_SIZE
];
1692 memcpy(check
+5, MAC
, 4);
1695 isOK
= sendCmdGetResponseWithRetries(check
, sizeof(check
), resp
, sizeof(resp
), 4, 6, 0, &eof_time
);
1696 cmd_send(CMD_ACK
,isOK
, 0, 0, 0, 0);
1699 static bool iClass_ReadBlock(uint8_t blockNo
, uint8_t *readdata
) {
1700 uint8_t readcmd
[] = {ICLASS_CMD_READ_OR_IDENTIFY
, blockNo
, 0x00, 0x00}; //0x88, 0x00 // can i use 0C?
1702 uint16_t rdCrc
= iclass_crc16(&bl
, 1);
1703 readcmd
[2] = rdCrc
>> 8;
1704 readcmd
[3] = rdCrc
& 0xff;
1709 //readcmd[1] = blockNo;
1710 isOK
= sendCmdGetResponseWithRetries(readcmd
, sizeof(readcmd
), resp
, sizeof(resp
), 10, 10, 0, &eof_time
);
1711 memcpy(readdata
, resp
, sizeof(resp
));
1716 void iClass_ReadBlk(uint8_t blockno
) {
1717 uint8_t readblockdata
[] = {0,0,0,0,0,0,0,0,0,0};
1719 isOK
= iClass_ReadBlock(blockno
, readblockdata
);
1720 cmd_send(CMD_ACK
, isOK
, 0, 0, readblockdata
, 8);
1721 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1724 void iClass_Dump(uint8_t blockno
, uint8_t numblks
) {
1725 uint8_t readblockdata
[] = {0,0,0,0,0,0,0,0,0,0};
1730 uint8_t *dataout
= BigBuf_malloc(255*8);
1731 if (dataout
== NULL
) {
1732 Dbprintf("out of memory");
1733 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1735 cmd_send(CMD_ACK
, 0, 1, 0, 0, 0);
1739 memset(dataout
, 0xFF, 255*8);
1741 for ( ; blkCnt
< numblks
; blkCnt
++) {
1742 isOK
= iClass_ReadBlock(blockno
+blkCnt
, readblockdata
);
1743 if (!isOK
|| (readblockdata
[0] == 0xBB || readblockdata
[7] == 0xBB || readblockdata
[2] == 0xBB)) { //try again
1744 isOK
= iClass_ReadBlock(blockno
+blkCnt
, readblockdata
);
1746 Dbprintf("Block %02X failed to read", blkCnt
+blockno
);
1750 memcpy(dataout
+ (blkCnt
*8), readblockdata
, 8);
1752 //return pointer to dump memory in arg3
1753 cmd_send(CMD_ACK
, isOK
, blkCnt
, BigBuf_max_traceLen(), 0, 0);
1754 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1759 static bool iClass_WriteBlock_ext(uint8_t blockNo
, uint8_t *data
) {
1760 uint8_t write
[] = { ICLASS_CMD_UPDATE
, blockNo
, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1761 //uint8_t readblockdata[10];
1762 //write[1] = blockNo;
1763 memcpy(write
+2, data
, 12); // data + mac
1764 char *wrCmd
= (char *)(write
+1);
1765 uint16_t wrCrc
= iclass_crc16(wrCmd
, 13);
1766 write
[14] = wrCrc
>> 8;
1767 write
[15] = wrCrc
& 0xff;
1770 uint32_t eof_time
= 0;
1772 isOK
= sendCmdGetResponseWithRetries(write
, sizeof(write
), resp
, sizeof(resp
), 10, 10, 0, &eof_time
);
1773 uint32_t start_time
= eof_time
+ DELAY_ICLASS_VICC_TO_VCD_READER
;
1774 if (isOK
) { //if reader responded correctly
1775 //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]);
1776 if (memcmp(write
+2, resp
, 8)) { //if response is not equal to write values
1777 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)
1779 isOK
= sendCmdGetResponseWithRetries(write
, sizeof(write
), resp
, sizeof(resp
), 10, 10, start_time
, &eof_time
);
1786 void iClass_WriteBlock(uint8_t blockNo
, uint8_t *data
) {
1787 bool isOK
= iClass_WriteBlock_ext(blockNo
, data
);
1789 Dbprintf("Write block [%02x] successful", blockNo
);
1791 Dbprintf("Write block [%02x] failed", blockNo
);
1793 cmd_send(CMD_ACK
, isOK
, 0, 0, 0, 0);
1794 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);
1797 void iClass_Clone(uint8_t startblock
, uint8_t endblock
, uint8_t *data
) {
1800 int total_block
= (endblock
- startblock
) + 1;
1801 for (i
= 0; i
< total_block
; i
++) {
1803 if (iClass_WriteBlock_ext(i
+startblock
, data
+ (i
*12))){
1804 Dbprintf("Write block [%02x] successful", i
+ startblock
);
1807 if (iClass_WriteBlock_ext(i
+startblock
, data
+ (i
*12))){
1808 Dbprintf("Write block [%02x] successful", i
+ startblock
);
1811 Dbprintf("Write block [%02x] failed", i
+ startblock
);
1815 if (written
== total_block
)
1816 Dbprintf("Clone complete");
1818 Dbprintf("Clone incomplete");
1820 cmd_send(CMD_ACK
, 1, 0, 0, 0, 0);
1821 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF
);