// Gerhard de Koning Gans - May 2008
// Hagen Fritsch - June 2010
// Gerhard de Koning Gans - May 2011
+// Gerhard de Koning Gans - June 2012 - Added iClass card and reader emulation
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
//-----------------------------------------------------------------------------
// Based on ISO14443a implementation. Still in experimental phase.
// Contribution made during a security research at Radboud University Nijmegen
-//
+//
// Please feel free to contribute and extend iClass support!!
//-----------------------------------------------------------------------------
//
-// TODO:
-// =====
-// - iClass emulation
-// - reader emulation
-//
// FIX:
// ====
// We still have sometimes a demodulation error when snooping iClass communication.
// The resulting trace of a read-block-03 command may look something like this:
//
-// + 22279: : 0c 03 e8 01
+// + 22279: : 0c 03 e8 01
//
// ...with an incorrect answer...
//
//
// A correct trace should look like this:
//
-// + 21112: : 0c 03 e8 01
-// + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5
+// + 21112: : 0c 03 e8 01
+// + 85: 0: TAG ff ff ff ff ff ff ff ff ea f5
//
//-----------------------------------------------------------------------------
+#include "iclass.h"
+
#include "proxmark3.h"
#include "apps.h"
#include "util.h"
#include "string.h"
+#include "printf.h"
#include "common.h"
-
-static uint8_t *trace = (uint8_t *) BigBuf;
-static int traceLen = 0;
-static int rsamples = 0;
-
-// CARD TO READER
-// Sequence D: 11110000 modulation with subcarrier during first half
-// Sequence E: 00001111 modulation with subcarrier during second half
-// Sequence F: 00000000 no modulation with subcarrier
-// READER TO CARD
-// Sequence X: 00001100 drop after half a period
-// Sequence Y: 00000000 no drop
-// Sequence Z: 11000000 drop at start
-#define SEC_D 0xf0
-#define SEC_E 0x0f
-#define SEC_F 0x00
-#define SEC_X 0x0c
-#define SEC_Y 0x00
-#define SEC_Z 0xc0
-
-static const uint8_t OddByteParity[256] = {
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
- 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
-};
-
-//static const uint8_t MajorityNibble[16] = { 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1 };
-//static const uint8_t MajorityNibble[16] = { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
-
-// BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT
-#define RECV_CMD_OFFSET 3032
-#define RECV_RES_OFFSET 3096
-#define DMA_BUFFER_OFFSET 3160
-#define DMA_BUFFER_SIZE 4096
-#define TRACE_LENGTH 3000
+#include "cmd.h"
+#include "iso14443a.h"
+#include "iso15693.h"
+// Needed for CRC in emulation mode;
+// same construction as in ISO 14443;
+// different initial value (CRC_ICLASS)
+#include "iso14443crc.h"
+#include "iso15693tools.h"
+#include "protocols.h"
+#include "optimized_cipher.h"
+#include "usb_cdc.h" // for usb_poll_validate_length
+#include "fpgaloader.h"
+
+// iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after
+// 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.
+// 330us = 140 ssp_clk cycles @ 423,75kHz when simulating.
+// 56,64us = 24 ssp_clk_cycles
+#define DELAY_ICLASS_VCD_TO_VICC_SIM (140 - 24)
+// times in ssp_clk_cycles @ 3,3625MHz when acting as reader
+#define DELAY_ICLASS_VICC_TO_VCD_READER DELAY_ISO15693_VICC_TO_VCD_READER
+// times in samples @ 212kHz when acting as reader
+#define ICLASS_READER_TIMEOUT_ACTALL 330 // 1558us, nominal 330us + 7slots*160us = 1450us
+#define ICLASS_READER_TIMEOUT_OTHERS 80 // 380us, nominal 330us
//-----------------------------------------------------------------------------
// variables.
//-----------------------------------------------------------------------------
static struct {
- enum {
- STATE_UNSYNCD,
- STATE_START_OF_COMMUNICATION,
- STATE_RECEIVING
- } state;
- uint16_t shiftReg;
- int bitCnt;
- int byteCnt;
- int byteCntMax;
- int posCnt;
- int nOutOfCnt;
- int OutOfCnt;
- int syncBit;
- int parityBits;
- int samples;
- int highCnt;
- int swapper;
- int counter;
- int bitBuffer;
- int dropPosition;
- uint8_t *output;
+ enum {
+ STATE_UNSYNCD,
+ STATE_START_OF_COMMUNICATION,
+ STATE_RECEIVING
+ } state;
+ uint16_t shiftReg;
+ int bitCnt;
+ int byteCnt;
+ int byteCntMax;
+ int posCnt;
+ int nOutOfCnt;
+ int OutOfCnt;
+ int syncBit;
+ int samples;
+ int highCnt;
+ int swapper;
+ int counter;
+ int bitBuffer;
+ int dropPosition;
+ uint8_t *output;
} Uart;
-static RAMFUNC int MillerDecoding(int bit)
-{
- int error = 0;
+static RAMFUNC int OutOfNDecoding(int bit) {
+ //int error = 0;
int bitright;
- if(!Uart.bitBuffer) {
+ if (!Uart.bitBuffer) {
Uart.bitBuffer = bit ^ 0xFF0;
- return FALSE;
- }
- else {
+ return false;
+ } else {
Uart.bitBuffer <<= 4;
Uart.bitBuffer ^= bit;
}
-
- /*if(Uart.swapper) {
+
+ /*if (Uart.swapper) {
Uart.output[Uart.byteCnt] = Uart.bitBuffer & 0xFF;
Uart.byteCnt++;
Uart.swapper = 0;
- if(Uart.byteCnt > 15) { return TRUE; }
+ if (Uart.byteCnt > 15) { return true; }
}
else {
Uart.swapper = 1;
}*/
- if(Uart.state != STATE_UNSYNCD) {
+ if (Uart.state != STATE_UNSYNCD) {
Uart.posCnt++;
- if((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) {
+ if ((Uart.bitBuffer & Uart.syncBit) ^ Uart.syncBit) {
bit = 0x00;
- }
- else {
+ } else {
bit = 0x01;
}
- if(((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) {
+ if (((Uart.bitBuffer << 1) & Uart.syncBit) ^ Uart.syncBit) {
bitright = 0x00;
- }
- else {
+ } else {
bitright = 0x01;
}
- if(bit != bitright) { bit = bitright; }
+ if (bit != bitright) {
+ bit = bitright;
+ }
+
-
// So, now we only have to deal with *bit*, lets see...
- if(Uart.posCnt == 1) {
+ if (Uart.posCnt == 1) {
// measurement first half bitperiod
- if(!bit) {
+ if (!bit) {
// Drop in first half means that we are either seeing
// an SOF or an EOF.
- if(Uart.nOutOfCnt == 1) {
+ if (Uart.nOutOfCnt == 1) {
// End of Communication
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
- if(Uart.byteCnt == 0) {
+ if (Uart.byteCnt == 0) {
// Its not straightforward to show single EOFs
- // So just leave it and do not return TRUE
- Uart.output[Uart.byteCnt] = 0xf0;
+ // So just leave it and do not return true
+ Uart.output[0] = 0xf0;
Uart.byteCnt++;
-
- // Calculate the parity bit for the client...
- Uart.parityBits = 1;
+ } else {
+ return true;
}
- else {
- return TRUE;
- }
- }
- else if(Uart.state != STATE_START_OF_COMMUNICATION) {
+ } else if (Uart.state != STATE_START_OF_COMMUNICATION) {
// When not part of SOF or EOF, it is an error
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
- error = 4;
+ //error = 4;
}
}
- }
- else {
+ } else {
// measurement second half bitperiod
// Count the bitslot we are in... (ISO 15693)
Uart.nOutOfCnt++;
-
- if(!bit) {
- if(Uart.dropPosition) {
- if(Uart.state == STATE_START_OF_COMMUNICATION) {
- error = 1;
- }
- else {
- error = 7;
+
+ if (!bit) {
+ if (Uart.dropPosition) {
+ if (Uart.state == STATE_START_OF_COMMUNICATION) {
+ //error = 1;
+ } else {
+ //error = 7;
}
// It is an error if we already have seen a drop in current frame
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
- }
- else {
+ } else {
Uart.dropPosition = Uart.nOutOfCnt;
}
}
Uart.posCnt = 0;
-
- if(Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) {
+
+ if (Uart.nOutOfCnt == Uart.OutOfCnt && Uart.OutOfCnt == 4) {
Uart.nOutOfCnt = 0;
-
- if(Uart.state == STATE_START_OF_COMMUNICATION) {
- if(Uart.dropPosition == 4) {
+
+ if (Uart.state == STATE_START_OF_COMMUNICATION) {
+ if (Uart.dropPosition == 4) {
Uart.state = STATE_RECEIVING;
Uart.OutOfCnt = 256;
- }
- else if(Uart.dropPosition == 3) {
+ } else if (Uart.dropPosition == 3) {
Uart.state = STATE_RECEIVING;
Uart.OutOfCnt = 4;
//Uart.output[Uart.byteCnt] = 0xdd;
//Uart.byteCnt++;
- }
- else {
+ } else {
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
}
Uart.dropPosition = 0;
- }
- else {
+ } else {
// RECEIVING DATA
// 1 out of 4
- if(!Uart.dropPosition) {
+ if (!Uart.dropPosition) {
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
- error = 9;
- }
- else {
+ //error = 9;
+ } else {
Uart.shiftReg >>= 2;
-
+
// Swap bit order
Uart.dropPosition--;
- //if(Uart.dropPosition == 1) { Uart.dropPosition = 2; }
- //else if(Uart.dropPosition == 2) { Uart.dropPosition = 1; }
-
+ //if (Uart.dropPosition == 1) { Uart.dropPosition = 2; }
+ //else if (Uart.dropPosition == 2) { Uart.dropPosition = 1; }
+
Uart.shiftReg ^= ((Uart.dropPosition & 0x03) << 6);
Uart.bitCnt += 2;
Uart.dropPosition = 0;
- if(Uart.bitCnt == 8) {
+ if (Uart.bitCnt == 8) {
Uart.output[Uart.byteCnt] = (Uart.shiftReg & 0xff);
Uart.byteCnt++;
-
- // Calculate the parity bit for the client...
- Uart.parityBits <<= 1;
- Uart.parityBits ^= OddByteParity[(Uart.shiftReg & 0xff)];
-
Uart.bitCnt = 0;
Uart.shiftReg = 0;
}
}
}
- }
- else if(Uart.nOutOfCnt == Uart.OutOfCnt) {
+ } else if (Uart.nOutOfCnt == Uart.OutOfCnt) {
// RECEIVING DATA
// 1 out of 256
- if(!Uart.dropPosition) {
+ if (!Uart.dropPosition) {
Uart.state = STATE_UNSYNCD;
Uart.highCnt = 0;
- error = 3;
- }
- else {
+ //error = 3;
+ } else {
Uart.dropPosition--;
Uart.output[Uart.byteCnt] = (Uart.dropPosition & 0xff);
Uart.byteCnt++;
-
- // Calculate the parity bit for the client...
- Uart.parityBits <<= 1;
- Uart.parityBits ^= OddByteParity[(Uart.dropPosition & 0xff)];
-
Uart.bitCnt = 0;
Uart.shiftReg = 0;
Uart.nOutOfCnt = 0;
}
}
- /*if(error) {
+ /*if (error) {
Uart.output[Uart.byteCnt] = 0xAA;
Uart.byteCnt++;
Uart.output[Uart.byteCnt] = error & 0xFF;
Uart.byteCnt++;
Uart.output[Uart.byteCnt] = 0xAA;
Uart.byteCnt++;
- return TRUE;
+ return true;
}*/
}
- }
- else {
+ } else {
bit = Uart.bitBuffer & 0xf0;
bit >>= 4;
bit ^= 0x0F; // drops become 1s ;-)
- if(bit) {
+ if (bit) {
// should have been high or at least (4 * 128) / fc
// according to ISO this should be at least (9 * 128 + 20) / fc
- if(Uart.highCnt == 8) {
+ if (Uart.highCnt == 8) {
// we went low, so this could be start of communication
// it turns out to be safer to choose a less significant
// syncbit... so we check whether the neighbour also represents the drop
Uart.posCnt = 1; // apparently we are busy with our first half bit period
Uart.syncBit = bit & 8;
Uart.samples = 3;
- if(!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; }
- else if(bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; }
- if(!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; }
- else if(bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; }
- if(!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0;
- if(Uart.syncBit && (Uart.bitBuffer & 8)) {
+ if (!Uart.syncBit) { Uart.syncBit = bit & 4; Uart.samples = 2; }
+ else if (bit & 4) { Uart.syncBit = bit & 4; Uart.samples = 2; bit <<= 2; }
+ if (!Uart.syncBit) { Uart.syncBit = bit & 2; Uart.samples = 1; }
+ else if (bit & 2) { Uart.syncBit = bit & 2; Uart.samples = 1; bit <<= 1; }
+ if (!Uart.syncBit) { Uart.syncBit = bit & 1; Uart.samples = 0;
+ if (Uart.syncBit && (Uart.bitBuffer & 8)) {
Uart.syncBit = 8;
// the first half bit period is expected in next sample
Uart.posCnt = 0;
Uart.samples = 3;
}
- }
- else if(bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; }
+ } else if (bit & 1) { Uart.syncBit = bit & 1; Uart.samples = 0; }
Uart.syncBit <<= 4;
Uart.state = STATE_START_OF_COMMUNICATION;
Uart.bitCnt = 0;
Uart.byteCnt = 0;
- Uart.parityBits = 0;
Uart.nOutOfCnt = 0;
Uart.OutOfCnt = 4; // Start at 1/4, could switch to 1/256
Uart.dropPosition = 0;
Uart.shiftReg = 0;
- error = 0;
- }
- else {
+ //error = 0;
+ } else {
Uart.highCnt = 0;
}
- }
- else {
- if(Uart.highCnt < 8) {
- Uart.highCnt++;
- }
+ } else if (Uart.highCnt < 8) {
+ Uart.highCnt++;
}
}
- return FALSE;
+ return false;
}
+
//=============================================================================
-// ISO 14443 Type A - Manchester
+// Manchester
//=============================================================================
static struct {
- enum {
- DEMOD_UNSYNCD,
+ enum {
+ DEMOD_UNSYNCD,
DEMOD_START_OF_COMMUNICATION,
DEMOD_START_OF_COMMUNICATION2,
DEMOD_START_OF_COMMUNICATION3,
DEMOD_END_OF_COMMUNICATION,
DEMOD_END_OF_COMMUNICATION2,
DEMOD_MANCHESTER_F,
- DEMOD_ERROR_WAIT
- } state;
- int bitCount;
- int posCount;
- int syncBit;
- int parityBits;
- uint16_t shiftReg;
- int buffer;
- int buffer2;
- int buffer3;
- int buff;
- int samples;
- int len;
+ DEMOD_ERROR_WAIT
+ } state;
+ int bitCount;
+ int posCount;
+ int syncBit;
+ uint16_t shiftReg;
+ int buffer;
+ int buffer2;
+ int buffer3;
+ int buff;
+ int samples;
+ int len;
enum {
SUB_NONE,
SUB_FIRST_HALF,
SUB_SECOND_HALF,
SUB_BOTH
- } sub;
- uint8_t *output;
+ } sub;
+ uint8_t *output;
} Demod;
-static RAMFUNC int ManchesterDecoding(int v)
-{
+static RAMFUNC int ManchesterDecoding(int v) {
int bit;
int modulation;
int error = 0;
Demod.buffer2 = Demod.buffer3;
Demod.buffer3 = v;
- if(Demod.buff < 3) {
+ if (Demod.buff < 3) {
Demod.buff++;
- return FALSE;
+ return false;
}
- if(Demod.state==DEMOD_UNSYNCD) {
+ if (Demod.state==DEMOD_UNSYNCD) {
Demod.output[Demod.len] = 0xfa;
Demod.syncBit = 0;
//Demod.samples = 0;
- Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part
- /* if(bit & 0x08) { Demod.syncBit = 0x08; }
- if(!Demod.syncBit) {
- if(bit & 0x04) { Demod.syncBit = 0x04; }
- }
- else if(bit & 0x04) { Demod.syncBit = 0x04; bit <<= 4; }
- if(!Demod.syncBit) {
- if(bit & 0x02) { Demod.syncBit = 0x02; }
- }
- else if(bit & 0x02) { Demod.syncBit = 0x02; bit <<= 4; }
- if(!Demod.syncBit) {
- if(bit & 0x01) { Demod.syncBit = 0x01; }
+ Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part
- if(Demod.syncBit && (Demod.buffer & 0x08)) {
- Demod.syncBit = 0x08;
-
- // The first half bitperiod is expected in next sample
- Demod.posCount = 0;
- Demod.output[Demod.len] = 0xfb;
- }
- }
- else if(bit & 0x01) { Demod.syncBit = 0x01; }
- */
-
- if(bit & 0x08) {
+ if (bit & 0x08) {
Demod.syncBit = 0x08;
}
- if(bit & 0x04) {
- if(Demod.syncBit) {
+ if (bit & 0x04) {
+ if (Demod.syncBit) {
bit <<= 4;
}
Demod.syncBit = 0x04;
}
- if(bit & 0x02) {
- if(Demod.syncBit) {
+ if (bit & 0x02) {
+ if (Demod.syncBit) {
bit <<= 2;
}
Demod.syncBit = 0x02;
}
- if(bit & 0x01 && Demod.syncBit) {
+ if (bit & 0x01 && Demod.syncBit) {
Demod.syncBit = 0x01;
}
-
- if(Demod.syncBit) {
+
+ if (Demod.syncBit) {
Demod.len = 0;
Demod.state = DEMOD_START_OF_COMMUNICATION;
Demod.sub = SUB_FIRST_HALF;
Demod.bitCount = 0;
Demod.shiftReg = 0;
- Demod.parityBits = 0;
Demod.samples = 0;
- if(Demod.posCount) {
- //if(trigger) LED_A_OFF(); // Not useful in this case...
- switch(Demod.syncBit) {
+ if (Demod.posCount) {
+ switch (Demod.syncBit) {
case 0x08: Demod.samples = 3; break;
case 0x04: Demod.samples = 2; break;
case 0x02: Demod.samples = 1; break;
case 0x01: Demod.samples = 0; break;
}
// SOF must be long burst... otherwise stay unsynced!!!
- if(!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) {
+ if (!(Demod.buffer & Demod.syncBit) || !(Demod.buffer2 & Demod.syncBit)) {
Demod.state = DEMOD_UNSYNCD;
}
- }
- else {
+ } else {
// SOF must be long burst... otherwise stay unsynced!!!
- if(!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) {
+ if (!(Demod.buffer2 & Demod.syncBit) || !(Demod.buffer3 & Demod.syncBit)) {
Demod.state = DEMOD_UNSYNCD;
error = 0x88;
}
error = 0;
}
- }
- else {
+ } else {
+ // state is DEMOD is in SYNC from here on.
modulation = bit & Demod.syncBit;
modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
- //modulation = ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
Demod.samples += 4;
- if(Demod.posCount==0) {
+ if (Demod.posCount == 0) {
Demod.posCount = 1;
- if(modulation) {
+ if (modulation) {
Demod.sub = SUB_FIRST_HALF;
- }
- else {
+ } else {
Demod.sub = SUB_NONE;
}
- }
- else {
+ } else {
Demod.posCount = 0;
- /*(modulation && (Demod.sub == SUB_FIRST_HALF)) {
- if(Demod.state!=DEMOD_ERROR_WAIT) {
- Demod.state = DEMOD_ERROR_WAIT;
- Demod.output[Demod.len] = 0xaa;
- error = 0x01;
- }
- }*/
- //else if(modulation) {
- if(modulation) {
- if(Demod.sub == SUB_FIRST_HALF) {
+ if (modulation) {
+ if (Demod.sub == SUB_FIRST_HALF) {
Demod.sub = SUB_BOTH;
- }
- else {
+ } else {
Demod.sub = SUB_SECOND_HALF;
}
- }
- else if(Demod.sub == SUB_NONE) {
- if(Demod.state == DEMOD_SOF_COMPLETE) {
+ } else if (Demod.sub == SUB_NONE) {
+ if (Demod.state == DEMOD_SOF_COMPLETE) {
Demod.output[Demod.len] = 0x0f;
Demod.len++;
- Demod.parityBits <<= 1;
- Demod.parityBits ^= OddByteParity[0x0f];
Demod.state = DEMOD_UNSYNCD;
-// error = 0x0f;
- return TRUE;
- }
- else {
+ return true;
+ } else {
Demod.state = DEMOD_ERROR_WAIT;
error = 0x33;
}
- /*if(Demod.state!=DEMOD_ERROR_WAIT) {
- Demod.state = DEMOD_ERROR_WAIT;
- Demod.output[Demod.len] = 0xaa;
- error = 0x01;
- }*/
}
switch(Demod.state) {
case DEMOD_START_OF_COMMUNICATION:
- if(Demod.sub == SUB_BOTH) {
- //Demod.state = DEMOD_MANCHESTER_D;
+ if (Demod.sub == SUB_BOTH) {
Demod.state = DEMOD_START_OF_COMMUNICATION2;
Demod.posCount = 1;
Demod.sub = SUB_NONE;
- }
- else {
+ } else {
Demod.output[Demod.len] = 0xab;
Demod.state = DEMOD_ERROR_WAIT;
error = 0xd2;
}
break;
case DEMOD_START_OF_COMMUNICATION2:
- if(Demod.sub == SUB_SECOND_HALF) {
+ if (Demod.sub == SUB_SECOND_HALF) {
Demod.state = DEMOD_START_OF_COMMUNICATION3;
- }
- else {
+ } else {
Demod.output[Demod.len] = 0xab;
Demod.state = DEMOD_ERROR_WAIT;
error = 0xd3;
}
break;
case DEMOD_START_OF_COMMUNICATION3:
- if(Demod.sub == SUB_SECOND_HALF) {
-// Demod.state = DEMOD_MANCHESTER_D;
+ if (Demod.sub == SUB_SECOND_HALF) {
Demod.state = DEMOD_SOF_COMPLETE;
- //Demod.output[Demod.len] = Demod.syncBit & 0xFF;
- //Demod.len++;
- }
- else {
+ } else {
Demod.output[Demod.len] = 0xab;
Demod.state = DEMOD_ERROR_WAIT;
error = 0xd4;
case DEMOD_MANCHESTER_E:
// OPPOSITE FROM ISO14443 - 11110000 = 0 (1 in 14443)
// 00001111 = 1 (0 in 14443)
- if(Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF
+ if (Demod.sub == SUB_SECOND_HALF) { // SUB_FIRST_HALF
Demod.bitCount++;
Demod.shiftReg = (Demod.shiftReg >> 1) ^ 0x100;
Demod.state = DEMOD_MANCHESTER_D;
- }
- else if(Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF
+ } else if (Demod.sub == SUB_FIRST_HALF) { // SUB_SECOND_HALF
Demod.bitCount++;
Demod.shiftReg >>= 1;
Demod.state = DEMOD_MANCHESTER_E;
- }
- else if(Demod.sub == SUB_BOTH) {
+ } else if (Demod.sub == SUB_BOTH) {
Demod.state = DEMOD_MANCHESTER_F;
- }
- else {
+ } else {
Demod.state = DEMOD_ERROR_WAIT;
error = 0x55;
}
case DEMOD_MANCHESTER_F:
// Tag response does not need to be a complete byte!
- if(Demod.len > 0 || Demod.bitCount > 0) {
- if(Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF
- Demod.shiftReg >>= (9 - Demod.bitCount);
+ if (Demod.len > 0 || Demod.bitCount > 0) {
+ if (Demod.bitCount > 1) { // was > 0, do not interpret last closing bit, is part of EOF
+ Demod.shiftReg >>= (9 - Demod.bitCount); // right align data
Demod.output[Demod.len] = Demod.shiftReg & 0xff;
Demod.len++;
- // No parity bit, so just shift a 0
- Demod.parityBits <<= 1;
}
Demod.state = DEMOD_UNSYNCD;
- return TRUE;
- }
- else {
+ return true;
+ } else {
Demod.output[Demod.len] = 0xad;
Demod.state = DEMOD_ERROR_WAIT;
error = 0x03;
break;
}
- /*if(Demod.bitCount>=9) {
- Demod.output[Demod.len] = Demod.shiftReg & 0xff;
- Demod.len++;
-
- Demod.parityBits <<= 1;
- Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01);
-
- Demod.bitCount = 0;
- Demod.shiftReg = 0;
- }*/
- if(Demod.bitCount>=8) {
+ if (Demod.bitCount >= 8) {
Demod.shiftReg >>= 1;
Demod.output[Demod.len] = (Demod.shiftReg & 0xff);
Demod.len++;
-
- // FOR ISO15639 PARITY NOT SEND OTA, JUST CALCULATE IT FOR THE CLIENT
- Demod.parityBits <<= 1;
- Demod.parityBits ^= OddByteParity[(Demod.shiftReg & 0xff)];
-
Demod.bitCount = 0;
Demod.shiftReg = 0;
}
- if(error) {
+ if (error) {
Demod.output[Demod.len] = 0xBB;
Demod.len++;
Demod.output[Demod.len] = error & 0xFF;
Demod.len++;
Demod.output[Demod.len] = 0xBB;
Demod.len++;
- return TRUE;
+ return true;
}
}
} // end (state != UNSYNCED)
- return FALSE;
+ return false;
}
//=============================================================================
-// Finally, a `sniffer' for ISO 14443 Type A
+// Finally, a `sniffer' for iClass communication
// Both sides of communication!
//=============================================================================
// triggering so that we start recording at the point that the tag is moved
// near the reader.
//-----------------------------------------------------------------------------
-void RAMFUNC SnoopIClass(void)
-{
-// #define RECV_CMD_OFFSET 2032 // original (working as of 21/2/09) values
-// #define RECV_RES_OFFSET 2096 // original (working as of 21/2/09) values
-// #define DMA_BUFFER_OFFSET 2160 // original (working as of 21/2/09) values
-// #define DMA_BUFFER_SIZE 4096 // original (working as of 21/2/09) values
-// #define TRACE_LENGTH 2000 // original (working as of 21/2/09) values
-
- // We won't start recording the frames that we acquire until we trigger;
- // a good trigger condition to get started is probably when we see a
- // response from the tag.
- int triggered = FALSE; // FALSE to wait first for card
-
- // The command (reader -> tag) that we're receiving.
+void RAMFUNC SnoopIClass(void) {
+
+ // We won't start recording the frames that we acquire until we trigger;
+ // a good trigger condition to get started is probably when we see a
+ // response from the tag.
+ //int triggered = false; // false to wait first for card
+
+ // The command (reader -> tag) that we're receiving.
// The length of a received command will in most cases be no more than 18 bytes.
// So 32 should be enough!
- uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
- // The response (tag -> reader) that we're receiving.
- uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
-
- // As we receive stuff, we copy it from receivedCmd or receivedResponse
- // into trace, along with its length and other annotations.
- //uint8_t *trace = (uint8_t *)BigBuf;
-
- traceLen = 0; // uncommented to fix ISSUE 15 - gerhard - jan2011
-
- // The DMA buffer, used to stream samples from the FPGA
- int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
- int lastRxCounter;
- int8_t *upTo;
- int smpl;
- int maxBehindBy = 0;
-
- // Count of samples received so far, so that we can include timing
- // information in the trace buffer.
- int samples = 0;
- rsamples = 0;
-
- memset(trace, 0x44, RECV_CMD_OFFSET);
-
- // Set up the demodulator for tag -> reader responses.
- Demod.output = receivedResponse;
- Demod.len = 0;
- Demod.state = DEMOD_UNSYNCD;
-
- // Setup for the DMA.
- FpgaSetupSsc();
- upTo = dmaBuf;
- lastRxCounter = DMA_BUFFER_SIZE;
- FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
-
- // And the reader -> tag commands
- memset(&Uart, 0, sizeof(Uart));
- Uart.output = receivedCmd;
- Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
- Uart.state = STATE_UNSYNCD;
-
- // And put the FPGA in the appropriate mode
- // Signal field is off with the appropriate LED
- LED_D_OFF();
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
- SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-
- int div = 0;
- //int div2 = 0;
- int decbyte = 0;
- int decbyter = 0;
-
- // And now we loop, receiving samples.
- for(;;) {
- LED_A_ON();
- WDT_HIT();
- int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) &
- (DMA_BUFFER_SIZE-1);
- if(behindBy > maxBehindBy) {
- maxBehindBy = behindBy;
- if(behindBy > 400) {
- Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
- goto done;
- }
- }
- if(behindBy < 1) continue;
+ #define ICLASS_BUFFER_SIZE 32
+ uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE];
+ // The response (tag -> reader) that we're receiving.
+ uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE];
+
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+ // free all BigBuf memory
+ BigBuf_free();
+ // The DMA buffer, used to stream samples from the FPGA
+ uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
+
+ set_tracing(true);
+ clear_trace();
+ iso14a_set_trigger(false);
+
+ int lastRxCounter;
+ uint8_t *upTo;
+ int smpl;
+ int maxBehindBy = 0;
+
+ // Count of samples received so far, so that we can include timing
+ // information in the trace buffer.
+ int samples = 0;
+ rsamples = 0;
+
+ // Set up the demodulator for tag -> reader responses.
+ Demod.output = tagToReaderResponse;
+ Demod.len = 0;
+ Demod.state = DEMOD_UNSYNCD;
+
+ // Setup for the DMA.
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
+ upTo = dmaBuf;
+ lastRxCounter = DMA_BUFFER_SIZE;
+ FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+
+ // And the reader -> tag commands
+ memset(&Uart, 0, sizeof(Uart));
+ Uart.output = readerToTagCmd;
+ Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
+ Uart.state = STATE_UNSYNCD;
+
+ // And put the FPGA in the appropriate mode
+ // Signal field is off with the appropriate LED
+ LED_D_OFF();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+ uint32_t time_0 = GetCountSspClk();
+ uint32_t time_start = 0;
+ uint32_t time_stop = 0;
+
+ int div = 0;
+ //int div2 = 0;
+ int decbyte = 0;
+ int decbyter = 0;
+
+ // And now we loop, receiving samples.
+ for (;;) {
+ LED_A_ON();
+ WDT_HIT();
+ int behindBy = (lastRxCounter - AT91C_BASE_PDC_SSC->PDC_RCR) & (DMA_BUFFER_SIZE-1);
+ if (behindBy > maxBehindBy) {
+ maxBehindBy = behindBy;
+ if (behindBy > (9 * DMA_BUFFER_SIZE / 10)) {
+ Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
+ goto done;
+ }
+ }
+ if (behindBy < 1) continue;
+
+ LED_A_OFF();
+ smpl = upTo[0];
+ upTo++;
+ lastRxCounter -= 1;
+ if (upTo - dmaBuf > DMA_BUFFER_SIZE) {
+ upTo -= DMA_BUFFER_SIZE;
+ lastRxCounter += DMA_BUFFER_SIZE;
+ AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
+ AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
+ }
+
+ //samples += 4;
+ samples += 1;
+
+ if (smpl & 0xF) {
+ decbyte ^= (1 << (3 - div));
+ }
+
+ // FOR READER SIDE COMMUMICATION...
+
+ decbyter <<= 2;
+ decbyter ^= (smpl & 0x30);
+
+ div++;
+
+ if ((div + 1) % 2 == 0) {
+ smpl = decbyter;
+ if (OutOfNDecoding((smpl & 0xF0) >> 4)) {
+ rsamples = samples - Uart.samples;
+ time_stop = (GetCountSspClk()-time_0) << 4;
+
+ //if (!LogTrace(Uart.output, Uart.byteCnt, rsamples, Uart.parityBits,true)) break;
+ //if (!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, true)) break;
+ uint8_t parity[MAX_PARITY_SIZE];
+ GetParity(Uart.output, Uart.byteCnt, parity);
+ LogTrace_ISO15693(Uart.output, Uart.byteCnt, time_start*32, time_stop*32, parity, true);
+
+ /* And ready to receive another command. */
+ Uart.state = STATE_UNSYNCD;
+ /* And also reset the demod code, which might have been */
+ /* false-triggered by the commands from the reader. */
+ Demod.state = DEMOD_UNSYNCD;
+ Uart.byteCnt = 0;
+ } else {
+ time_start = (GetCountSspClk()-time_0) << 4;
+ }
+ decbyter = 0;
+ }
+
+ if (div > 3) {
+ smpl = decbyte;
+ if (ManchesterDecoding(smpl & 0x0F)) {
+ time_stop = (GetCountSspClk()-time_0) << 4;
+
+ rsamples = samples - Demod.samples;
+
+ uint8_t parity[MAX_PARITY_SIZE];
+ GetParity(Demod.output, Demod.len, parity);
+ LogTrace_ISO15693(Demod.output, Demod.len, time_start*32, time_stop*32, parity, false);
+
+ // And ready to receive another response.
+ memset(&Demod, 0, sizeof(Demod));
+ Demod.output = tagToReaderResponse;
+ Demod.state = DEMOD_UNSYNCD;
+ } else {
+ time_start = (GetCountSspClk()-time_0) << 4;
+ }
+
+ div = 0;
+ decbyte = 0x00;
+ }
+
+ if (BUTTON_PRESS()) {
+ DbpString("cancelled_a");
+ goto done;
+ }
+ }
+
+ DbpString("COMMAND FINISHED");
+
+ Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
+ Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
+
+done:
+ AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
+ Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
+ Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
+ LEDsoff();
+}
+
+void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) {
+ int i;
+ for (i = 0; i < 8; i++) {
+ rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5);
+ }
+}
+
+// Encode SOF only
+static void CodeIClassTagSOF() {
+ ToSendReset();
+ ToSend[++ToSendMax] = 0x1D;
+ ToSendMax++;
+}
+
+static void AppendCrc(uint8_t *data, int len) {
+ ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1);
+}
+
+
+/**
+ * @brief Does the actual simulation
+ */
+int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
+
+ // free eventually allocated BigBuf memory
+ BigBuf_free_keep_EM();
+
+ uint16_t page_size = 32 * 8;
+ uint8_t current_page = 0;
+
+ // maintain cipher states for both credit and debit key for each page
+ State cipher_state_KC[8];
+ State cipher_state_KD[8];
+ State *cipher_state = &cipher_state_KD[0];
+
+ uint8_t *emulator = BigBuf_get_EM_addr();
+ uint8_t *csn = emulator;
+
+ // CSN followed by two CRC bytes
+ uint8_t anticoll_data[10];
+ uint8_t csn_data[10];
+ memcpy(csn_data, csn, sizeof(csn_data));
+ 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]);
+
+ // Construct anticollision-CSN
+ rotateCSN(csn_data, anticoll_data);
+
+ // Compute CRC on both CSNs
+ AppendCrc(anticoll_data, 8);
+ AppendCrc(csn_data, 8);
+
+ uint8_t diversified_key_d[8] = { 0x00 };
+ uint8_t diversified_key_c[8] = { 0x00 };
+ uint8_t *diversified_key = diversified_key_d;
+
+ // configuration block
+ uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00};
+
+ // e-Purse
+ uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ // initialize from page 0
+ memcpy(conf_block, emulator + 8 * 1, 8);
+ memcpy(card_challenge_data, emulator + 8 * 2, 8); // e-purse
+ memcpy(diversified_key_d, emulator + 8 * 3, 8); // Kd
+ memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc
+ }
+
+ AppendCrc(conf_block, 8);
+
+ // save card challenge for sim2,4 attack
+ if (reader_mac_buf != NULL) {
+ memcpy(reader_mac_buf, card_challenge_data, 8);
+ }
+
+ if (conf_block[5] & 0x80) {
+ page_size = 256 * 8;
+ }
+
+ // From PicoPass DS:
+ // When the page is in personalization mode this bit is equal to 1.
+ // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0:
+ // the page is then "in application mode".
+ bool personalization_mode = conf_block[7] & 0x80;
+
+ // chip memory may be divided in 8 pages
+ uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7;
+
+ // Precalculate the cipher states, feeding it the CC
+ cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ for (int i = 1; i < max_page; i++) {
+ uint8_t *epurse = emulator + i*page_size + 8*2;
+ uint8_t *Kd = emulator + i*page_size + 8*3;
+ uint8_t *Kc = emulator + i*page_size + 8*4;
+ cipher_state_KD[i] = opt_doTagMAC_1(epurse, Kd);
+ cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc);
+ }
+ }
+
+ int exitLoop = 0;
+ // Reader 0a
+ // Tag 0f
+ // Reader 0c
+ // Tag anticoll. CSN
+ // Reader 81 anticoll. CSN
+ // Tag CSN
+
+ uint8_t *modulated_response;
+ int modulated_response_size = 0;
+ uint8_t *trace_data = NULL;
+ int trace_data_size = 0;
+
+ // Respond SOF -- takes 1 bytes
+ uint8_t *resp_sof = BigBuf_malloc(1);
+ int resp_sof_Len;
+
+ // Anticollision CSN (rotated CSN)
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_anticoll = BigBuf_malloc(22);
+ int resp_anticoll_len;
+
+ // CSN (block 0)
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_csn = BigBuf_malloc(22);
+ int resp_csn_len;
+
+ // configuration (block 1) picopass 2ks
+ uint8_t *resp_conf = BigBuf_malloc(22);
+ int resp_conf_len;
+
+ // e-Purse (block 2)
+ // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
+ uint8_t *resp_cc = BigBuf_malloc(18);
+ int resp_cc_len;
+
+ // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only
+ uint8_t *resp_ff = BigBuf_malloc(22);
+ int resp_ff_len;
+ uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+ AppendCrc(ff_data, 8);
+
+ // Application Issuer Area (block 5)
+ uint8_t *resp_aia = BigBuf_malloc(22);
+ int resp_aia_len;
+ uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+ AppendCrc(aia_data, 8);
+
+ uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
+ int len;
+
+ // Prepare card messages
+
+ // First card answer: SOF only
+ CodeIClassTagSOF();
+ memcpy(resp_sof, ToSend, ToSendMax);
+ resp_sof_Len = ToSendMax;
+
+ // Anticollision CSN
+ CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data));
+ memcpy(resp_anticoll, ToSend, ToSendMax);
+ resp_anticoll_len = ToSendMax;
+
+ // CSN (block 0)
+ CodeIso15693AsTag(csn_data, sizeof(csn_data));
+ memcpy(resp_csn, ToSend, ToSendMax);
+ resp_csn_len = ToSendMax;
+
+ // Configuration (block 1)
+ CodeIso15693AsTag(conf_block, sizeof(conf_block));
+ memcpy(resp_conf, ToSend, ToSendMax);
+ resp_conf_len = ToSendMax;
+
+ // e-Purse (block 2)
+ CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax);
+ resp_cc_len = ToSendMax;
+
+ // Kd, Kc (blocks 3 and 4)
+ CodeIso15693AsTag(ff_data, sizeof(ff_data));
+ memcpy(resp_ff, ToSend, ToSendMax);
+ resp_ff_len = ToSendMax;
+
+ // Application Issuer Area (block 5)
+ CodeIso15693AsTag(aia_data, sizeof(aia_data));
+ memcpy(resp_aia, ToSend, ToSendMax);
+ resp_aia_len = ToSendMax;
+
+ //This is used for responding to READ-block commands or other data which is dynamically generated
+ uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer
+ uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2);
+
+ bool buttonPressed = false;
+ enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE;
+
+ while (!exitLoop) {
+ WDT_HIT();
+
+ uint32_t reader_eof_time = 0;
+ len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time);
+ if (len < 0) {
+ buttonPressed = true;
+ break;
+ }
+
+ // Now look at the reader command and provide appropriate responses
+ // default is no response:
+ modulated_response = NULL;
+ modulated_response_size = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+
+ if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) {
+ // Reader in anticollision phase
+ if (chip_state != HALTED) {
+ modulated_response = resp_sof;
+ modulated_response_size = resp_sof_Len;
+ chip_state = ACTIVATED;
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify
+ // Reader asks for anticollision CSN
+ if (chip_state == SELECTED || chip_state == ACTIVATED) {
+ modulated_response = resp_anticoll;
+ modulated_response_size = resp_anticoll_len;
+ trace_data = anticoll_data;
+ trace_data_size = sizeof(anticoll_data);
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) {
+ // Reader selects anticollision CSN.
+ // Tag sends the corresponding real CSN
+ if (chip_state == ACTIVATED || chip_state == SELECTED) {
+ if (!memcmp(receivedCmd+1, anticoll_data, 8)) {
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ chip_state = SELECTED;
+ } else {
+ chip_state = IDLE;
+ }
+ } else if (chip_state == HALTED) {
+ // RESELECT with CSN
+ if (!memcmp(receivedCmd+1, csn_data, 8)) {
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ chip_state = SELECTED;
+ }
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block
+ uint16_t blockNo = receivedCmd[1];
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+ // provide defaults for blocks 0 ... 5
+ switch (blockNo) {
+ case 0: // csn (block 00)
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ break;
+ case 1: // configuration (block 01)
+ modulated_response = resp_conf;
+ modulated_response_size = resp_conf_len;
+ trace_data = conf_block;
+ trace_data_size = sizeof(conf_block);
+ break;
+ case 2: // e-purse (block 02)
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
+ // set epurse of sim2,4 attack
+ if (reader_mac_buf != NULL) {
+ memcpy(reader_mac_buf, card_challenge_data, 8);
+ }
+ break;
+ case 3:
+ case 4: // Kd, Kc, always respond with 0xff bytes
+ modulated_response = resp_ff;
+ modulated_response_size = resp_ff_len;
+ trace_data = ff_data;
+ trace_data_size = sizeof(ff_data);
+ break;
+ case 5: // Application Issuer Area (block 05)
+ modulated_response = resp_aia;
+ modulated_response_size = resp_aia_len;
+ trace_data = aia_data;
+ trace_data_size = sizeof(aia_data);
+ break;
+ // default: don't respond
+ }
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes
+ modulated_response = resp_ff;
+ modulated_response_size = resp_ff_len;
+ trace_data = ff_data;
+ trace_data_size = sizeof(ff_data);
+ } else { // use data from emulator memory
+ memcpy(data_generic_trace, emulator + current_page*page_size + 8*blockNo, 8);
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+ }
+ }
+
+ } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD
+ || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) {
+ // Read e-purse (88 02 || 18 02)
+ if (chip_state == SELECTED) {
+ if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD){
+ cipher_state = &cipher_state_KD[current_page];
+ diversified_key = diversified_key_d;
+ } else {
+ cipher_state = &cipher_state_KC[current_page];
+ diversified_key = diversified_key_c;
+ }
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
+ }
+
+ } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC
+ || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) {
+ // Reader random and reader MAC!!!
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ //NR, from reader, is in receivedCmd+1
+ opt_doTagMAC_2(*cipher_state, receivedCmd+1, data_generic_trace, diversified_key);
+ trace_data = data_generic_trace;
+ trace_data_size = 4;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ //exitLoop = true;
+ } else { // Not fullsim, we don't respond
+ // We do not know what to answer, so lets keep quiet
+ if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+ if (reader_mac_buf != NULL) {
+ // save NR and MAC for sim 2,4
+ memcpy(reader_mac_buf + 8, receivedCmd + 1, 8);
+ }
+ exitLoop = true;
+ }
+ }
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
+ if (chip_state == SELECTED) {
+ // Reader ends the session
+ modulated_response = resp_sof;
+ modulated_response_size = resp_sof_Len;
+ chip_state = HALTED;
+ }
+
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06
+ //Read 4 blocks
+ if (chip_state == SELECTED) {
+ uint8_t blockNo = receivedCmd[1];
+ memcpy(data_generic_trace, emulator + current_page*page_size + blockNo*8, 8 * 4);
+ AppendCrc(data_generic_trace, 8 * 4);
+ trace_data = data_generic_trace;
+ trace_data_size = 8 * 4 + 2;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) {
+ // We're expected to respond with the data+crc, exactly what's already in the receivedCmd
+ // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b
+ if (chip_state == SELECTED) {
+ uint8_t blockNo = receivedCmd[1];
+ if (blockNo == 2) { // update e-purse
+ memcpy(card_challenge_data, receivedCmd+2, 8);
+ CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax);
+ resp_cc_len = ToSendMax;
+ cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*2, card_challenge_data, 8);
+ }
+ } else if (blockNo == 3) { // update Kd
+ for (int i = 0; i < 8; i++) {
+ if (personalization_mode) {
+ diversified_key_d[i] = receivedCmd[2 + i];
+ } else {
+ diversified_key_d[i] ^= receivedCmd[2 + i];
+ }
+ }
+ cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8);
+ }
+ } else if (blockNo == 4) { // update Kc
+ for (int i = 0; i < 8; i++) {
+ if (personalization_mode) {
+ diversified_key_c[i] = receivedCmd[2 + i];
+ } else {
+ diversified_key_c[i] ^= receivedCmd[2 + i];
+ }
+ }
+ cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*4, diversified_key_c, 8);
+ }
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block
+ memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8);
+ }
+ memcpy(data_generic_trace, receivedCmd + 2, 8);
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) {
+ // Pagesel
+ // Chips with a single page will not answer to this command
+ // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) {
+ current_page = receivedCmd[1];
+ memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8);
+ memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8);
+ memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8);
+ cipher_state = &cipher_state_KD[current_page];
+ personalization_mode = data_generic_trace[7] & 0x80;
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+ }
+
+ } else if (receivedCmd[0] == 0x26 && len == 5) {
+ // standard ISO15693 INVENTORY command. Ignore.
+
+ } else {
+ // don't know how to handle this command
+ char debug_message[250]; // should be enough
+ sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len);
+ for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) {
+ sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]);
+ }
+ Dbprintf("%s", debug_message);
+ // Do not respond
+ }
+
+ /**
+ A legit tag has about 273,4us delay between reader EOT and tag SOF.
+ **/
+ if (modulated_response_size > 0) {
+ uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM;
+ TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, false);
+ LogTrace_ISO15693(trace_data, trace_data_size, response_time*32, response_time*32 + modulated_response_size/2, NULL, false);
+ }
+
+ }
+
+ if (buttonPressed)
+ {
+ DbpString("Button pressed");
+ }
+ return buttonPressed;
+}
+
+/**
+ * @brief SimulateIClass simulates an iClass card.
+ * @param arg0 type of simulation
+ * - 0 uses the first 8 bytes in usb data as CSN
+ * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified
+ * in the usb data. This mode collects MAC from the reader, in order to do an offline
+ * attack on the keys. For more info, see "dismantling iclass" and proxclone.com.
+ * - Other : Uses the default CSN (031fec8af7ff12e0)
+ * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only)
+ * @param arg2
+ * @param datain
+ */
+void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) {
+
+ LED_A_ON();
+
+ uint32_t simType = arg0;
+ uint32_t numberOfCSNS = arg1;
+
+ // setup hardware for simulation:
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+ LED_D_OFF();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
+ StartCountSspClk();
+
+ // Enable and clear the trace
+ set_tracing(true);
+ clear_trace();
+ //Use the emulator memory for SIM
+ uint8_t *emulator = BigBuf_get_EM_addr();
+
+ if (simType == ICLASS_SIM_MODE_CSN) {
+ // Use the CSN from commandline
+ memcpy(emulator, datain, 8);
+ doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+ } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) {
+ //Default CSN
+ uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+ // Use the CSN from commandline
+ memcpy(emulator, csn_crc, 8);
+ doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+ } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) {
+ uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 };
+ Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS);
+ // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
+ // in order to collect MAC's from the reader. This can later be used in an offline-attack
+ // in order to obtain the keys, as in the "dismantling iclass"-paper.
+ int i;
+ for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) {
+ // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response).
+ memcpy(emulator, datain+(i*8), 8);
+ if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) {
+ // Button pressed
+ break;
+ }
+ Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+ datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3],
+ datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]);
+ Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x",
+ mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11],
+ mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]);
+ SpinDelay(100); // give the reader some time to prepare for next CSN
+ }
+ cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16);
+ } else if (simType == ICLASS_SIM_MODE_FULL) {
+ //This is 'full sim' mode, where we use the emulator storage for data.
+ doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL);
+ } else {
+ // We may want a mode here where we hardcode the csns to use (from proxclone).
+ // That will speed things up a little, but not required just yet.
+ Dbprintf("The mode is not implemented, reserved for future use");
+ }
+
+ Dbprintf("Done...");
LED_A_OFF();
- smpl = upTo[0];
- upTo++;
- lastRxCounter -= 1;
- if(upTo - dmaBuf > DMA_BUFFER_SIZE) {
- upTo -= DMA_BUFFER_SIZE;
- lastRxCounter += DMA_BUFFER_SIZE;
- AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) upTo;
- AT91C_BASE_PDC_SSC->PDC_RNCR = DMA_BUFFER_SIZE;
- }
-
- //samples += 4;
- samples += 1;
- //div2++;
-
- //if(div2 > 3) {
- //div2 = 0;
- //decbyte ^= ((smpl & 0x01) << (3 - div));
- //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1)) << (3 - div)); // better already...
- //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1) | ((smpl & 0x04) >> 2)) << (3 - div)); // even better...
- if(smpl & 0xF) {
- decbyte ^= (1 << (3 - div));
+}
+
+
+/// THE READER CODE
+
+static void ReaderTransmitIClass(uint8_t *frame, int len, uint32_t *start_time) {
+
+ CodeIso15693AsReader(frame, len);
+
+ TransmitTo15693Tag(ToSend, ToSendMax, start_time);
+
+ uint32_t end_time = *start_time + 32*(8*ToSendMax-4); // substract the 4 padding bits after EOF
+ LogTrace_ISO15693(frame, len, *start_time*4, end_time*4, NULL, true);
+}
+
+
+static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, size_t max_resp_size,
+ uint8_t expected_size, uint8_t retries, uint32_t start_time, uint32_t *eof_time) {
+ while (retries-- > 0) {
+ ReaderTransmitIClass(command, cmdsize, &start_time);
+ if (expected_size == GetIso15693AnswerFromTag(resp, max_resp_size, ICLASS_READER_TIMEOUT_OTHERS, eof_time)) {
+ return true;
+ }
}
- //decbyte ^= (MajorityNibble[(smpl & 0x0F)] << (3 - div));
-
- // FOR READER SIDE COMMUMICATION...
- //decbyte ^= ((smpl & 0x10) << (3 - div));
- decbyter <<= 2;
- decbyter ^= (smpl & 0x30);
+ return false;//Error
+}
+
+/**
+ * @brief Selects an iclass tag
+ * @param card_data where the CSN is stored for return
+ * @return false = fail
+ * true = success
+ */
+static bool selectIclassTag(uint8_t *card_data, uint32_t *eof_time) {
+ uint8_t act_all[] = { 0x0a };
+ uint8_t identify[] = { 0x0c };
+ uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+
+ uint32_t start_time = GetCountSspClk();
+
+ // Send act_all
+ ReaderTransmitIClass(act_all, 1, &start_time);
+ // Card present?
+ if (GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_ACTALL, eof_time) < 0) return false;//Fail
+
+ //Send Identify
+ start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ ReaderTransmitIClass(identify, 1, &start_time);
+ //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
+ uint8_t len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time);
+ if (len != 10) return false;//Fail
+
+ //Copy the Anti-collision CSN to our select-packet
+ memcpy(&select[1], resp, 8);
+ //Select the card
+ start_time = *eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ ReaderTransmitIClass(select, sizeof(select), &start_time);
+ //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
+ len = GetIso15693AnswerFromTag(resp, sizeof(resp), ICLASS_READER_TIMEOUT_OTHERS, eof_time);
+ if (len != 10) return false;//Fail
+
+ //Success - we got CSN
+ //Save CSN in response data
+ memcpy(card_data, resp, 8);
+
+ return true;
+}
+
+
+// Select an iClass tag and read all blocks which are always readable without authentication
+void ReaderIClass(uint8_t arg0) {
+
+ LED_A_ON();
+
+ uint8_t card_data[6 * 8] = {0};
+ memset(card_data, 0xFF, sizeof(card_data));
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+ //Read conf block CRC(0x01) => 0xfa 0x22
+ uint8_t readConf[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22};
+ //Read e-purse block CRC(0x02) => 0x61 0x10
+ uint8_t readEpurse[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x02, 0x61, 0x10};
+ //Read App Issuer Area block CRC(0x05) => 0xde 0x64
+ uint8_t readAA[] = {ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64};
+
+ uint8_t result_status = 0;
+
+ // test flags for what blocks to be sure to read
+ uint8_t flagReadConfig = arg0 & FLAG_ICLASS_READER_CONF;
+ uint8_t flagReadCC = arg0 & FLAG_ICLASS_READER_CC;
+ uint8_t flagReadAA = arg0 & FLAG_ICLASS_READER_AA;
+
+ set_tracing(true);
+ clear_trace();
+ Iso15693InitReader();
+
+ StartCountSspClk();
+ uint32_t start_time = 0;
+ uint32_t eof_time = 0;
- div++;
+ if (selectIclassTag(resp, &eof_time)) {
+ result_status = FLAG_ICLASS_READER_CSN;
+ memcpy(card_data, resp, 8);
+ }
+
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
- if((div + 1) % 2 == 0) {
- smpl = decbyter;
- if(MillerDecoding((smpl & 0xF0) >> 4)) {
- rsamples = samples - Uart.samples;
- LED_C_ON();
- //if(triggered) {
- trace[traceLen++] = ((rsamples >> 0) & 0xff);
- trace[traceLen++] = ((rsamples >> 8) & 0xff);
- trace[traceLen++] = ((rsamples >> 16) & 0xff);
- trace[traceLen++] = ((rsamples >> 24) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 0) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 8) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff);
- trace[traceLen++] = Uart.byteCnt;
- memcpy(trace+traceLen, receivedCmd, Uart.byteCnt);
- traceLen += Uart.byteCnt;
- if(traceLen > TRACE_LENGTH) break;
- //}
- /* And ready to receive another command. */
- Uart.state = STATE_UNSYNCD;
- /* And also reset the demod code, which might have been */
- /* false-triggered by the commands from the reader. */
- Demod.state = DEMOD_UNSYNCD;
- LED_B_OFF();
- Uart.byteCnt = 0;
- }
- decbyter = 0;
+ //Read block 1, config
+ if (flagReadConfig) {
+ if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, sizeof(resp), 10, 10, start_time, &eof_time)) {
+ result_status |= FLAG_ICLASS_READER_CONF;
+ memcpy(card_data+8, resp, 8);
+ } else {
+ Dbprintf("Failed to read config block");
+ }
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ }
+
+ //Read block 2, e-purse
+ if (flagReadCC) {
+ if (sendCmdGetResponseWithRetries(readEpurse, sizeof(readEpurse), resp, sizeof(resp), 10, 10, start_time, &eof_time)) {
+ result_status |= FLAG_ICLASS_READER_CC;
+ memcpy(card_data + (8*2), resp, 8);
+ } else {
+ Dbprintf("Failed to read e-purse");
+ }
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
}
- if(div > 3) {
- smpl = decbyte;
- if(ManchesterDecoding(smpl & 0x0F)) {
- rsamples = samples - Demod.samples;
- LED_B_ON();
-
- // timestamp, as a count of samples
- trace[traceLen++] = ((rsamples >> 0) & 0xff);
- trace[traceLen++] = ((rsamples >> 8) & 0xff);
- trace[traceLen++] = ((rsamples >> 16) & 0xff);
- trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 0) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 8) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff);
- // length
- trace[traceLen++] = Demod.len;
- memcpy(trace+traceLen, receivedResponse, Demod.len);
- traceLen += Demod.len;
- if(traceLen > TRACE_LENGTH) break;
-
- triggered = TRUE;
-
- // And ready to receive another response.
- memset(&Demod, 0, sizeof(Demod));
- Demod.output = receivedResponse;
- Demod.state = DEMOD_UNSYNCD;
- LED_C_OFF();
- }
-
- div = 0;
- decbyte = 0x00;
+ //Read block 5, AA
+ if (flagReadAA) {
+ if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, sizeof(resp), 10, 10, start_time, &eof_time)) {
+ result_status |= FLAG_ICLASS_READER_AA;
+ memcpy(card_data + (8*5), resp, 8);
+ } else {
+ Dbprintf("Failed to read AA block");
+ }
}
- //}
- if(BUTTON_PRESS()) {
- DbpString("cancelled_a");
- goto done;
- }
- }
+ cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data));
- DbpString("COMMAND FINISHED");
+ LED_A_OFF();
+}
- Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
- Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
-done:
- AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
- Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
- Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
- LED_A_OFF();
- LED_B_OFF();
- LED_C_OFF();
+void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
+
+ LED_A_ON();
+
+ bool use_credit_key = false;
+ uint8_t card_data[USB_CMD_DATA_SIZE]={0};
+ uint16_t block_crc_LUT[255] = {0};
+
+ //Generate a lookup table for block crc
+ for (int block = 0; block < 255; block++){
+ char bl = block;
+ block_crc_LUT[block] = iclass_crc16(&bl ,1);
+ }
+ //Dbprintf("Lookup table: %02x %02x %02x" ,block_crc_LUT[0],block_crc_LUT[1],block_crc_LUT[2]);
+
+ uint8_t readcheck_cc[] = { ICLASS_CMD_READCHECK_KD, 0x02 };
+ if (use_credit_key)
+ readcheck_cc[0] = ICLASS_CMD_READCHECK_KC;
+ uint8_t check[] = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ uint8_t read[] = { 0x0c, 0x00, 0x00, 0x00 };
+
+ uint16_t crc = 0;
+ uint8_t cardsize = 0;
+ uint8_t mem = 0;
+
+ static struct memory_t {
+ int k16;
+ int book;
+ int k2;
+ int lockauth;
+ int keyaccess;
+ } memory;
+
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+
+ set_tracing(true);
+ clear_trace();
+ Iso15693InitReader();
+
+ StartCountSspClk();
+ uint32_t start_time = 0;
+ uint32_t eof_time = 0;
+
+ while (!BUTTON_PRESS()) {
+
+ WDT_HIT();
+
+ if (!get_tracing()) {
+ DbpString("Trace full");
+ break;
+ }
+
+ if (!selectIclassTag(card_data, &eof_time)) continue;
+
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ if (!sendCmdGetResponseWithRetries(readcheck_cc, sizeof(readcheck_cc), resp, sizeof(resp), 8, 3, start_time, &eof_time)) continue;
+
+ // replay captured auth (cc must not have been updated)
+ memcpy(check+5, MAC, 4);
+
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 5, start_time, &eof_time)) {
+ Dbprintf("Error: Authentication Fail!");
+ continue;
+ }
+
+ //first get configuration block (block 1)
+ crc = block_crc_LUT[1];
+ read[1] = 1;
+ read[2] = crc >> 8;
+ read[3] = crc & 0xff;
+
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ if (!sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &eof_time)) {
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ Dbprintf("Dump config (block 1) failed");
+ continue;
+ }
+
+ mem = resp[5];
+ memory.k16 = (mem & 0x80);
+ memory.book = (mem & 0x20);
+ memory.k2 = (mem & 0x8);
+ memory.lockauth = (mem & 0x2);
+ memory.keyaccess = (mem & 0x1);
+
+ cardsize = memory.k16 ? 255 : 32;
+ WDT_HIT();
+ //Set card_data to all zeroes, we'll fill it with data
+ memset(card_data, 0x0, USB_CMD_DATA_SIZE);
+ uint8_t failedRead = 0;
+ uint32_t stored_data_length = 0;
+ //then loop around remaining blocks
+ for (int block = 0; block < cardsize; block++) {
+ read[1] = block;
+ crc = block_crc_LUT[block];
+ read[2] = crc >> 8;
+ read[3] = crc & 0xff;
+
+ start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, sizeof(resp), 10, 10, start_time, &eof_time)) {
+ Dbprintf(" %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
+ block, resp[0], resp[1], resp[2],
+ resp[3], resp[4], resp[5],
+ resp[6], resp[7]);
+
+ //Fill up the buffer
+ memcpy(card_data+stored_data_length, resp, 8);
+ stored_data_length += 8;
+ if (stored_data_length +8 > USB_CMD_DATA_SIZE) {
+ //Time to send this off and start afresh
+ cmd_send(CMD_ACK,
+ stored_data_length,//data length
+ failedRead,//Failed blocks?
+ 0,//Not used ATM
+ card_data, stored_data_length);
+ //reset
+ stored_data_length = 0;
+ failedRead = 0;
+ }
+
+ } else {
+ failedRead = 1;
+ stored_data_length += 8;//Otherwise, data becomes misaligned
+ Dbprintf("Failed to dump block %d", block);
+ }
+ }
+
+ //Send off any remaining data
+ if (stored_data_length > 0) {
+ cmd_send(CMD_ACK,
+ stored_data_length,//data length
+ failedRead,//Failed blocks?
+ 0,//Not used ATM
+ card_data,
+ stored_data_length);
+ }
+ //If we got here, let's break
+ break;
+ }
+ //Signal end of transmission
+ cmd_send(CMD_ACK,
+ 0,//data length
+ 0,//Failed blocks?
+ 0,//Not used ATM
+ card_data,
+ 0);
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ LED_A_OFF();
+}
+
+
+void iClass_Check(uint8_t *MAC) {
+ uint8_t check[9] = {ICLASS_CMD_CHECK_KD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+ uint8_t resp[4];
+ memcpy(check+5, MAC, 4);
+ uint32_t eof_time;
+ bool isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, sizeof(resp), 4, 6, 0, &eof_time);
+ cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp));
+}
+
+
+void iClass_Readcheck(uint8_t block, bool use_credit_key) {
+ uint8_t readcheck[2] = {ICLASS_CMD_READCHECK_KD, block};
+ if (use_credit_key) {
+ readcheck[0] = ICLASS_CMD_READCHECK_KC;
+ }
+ uint8_t resp[8];
+ uint32_t eof_time;
+ bool isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 8, 6, 0, &eof_time);
+ cmd_send(CMD_ACK, isOK, 0, 0, resp, sizeof(resp));
+}
+
+
+static bool iClass_ReadBlock(uint8_t blockNo, uint8_t *readdata) {
+ uint8_t readcmd[] = {ICLASS_CMD_READ_OR_IDENTIFY, blockNo, 0x00, 0x00}; //0x88, 0x00 // can i use 0C?
+ char bl = blockNo;
+ uint16_t rdCrc = iclass_crc16(&bl, 1);
+ readcmd[2] = rdCrc >> 8;
+ readcmd[3] = rdCrc & 0xff;
+ uint8_t resp[10];
+ bool isOK = false;
+ uint32_t eof_time;
+
+ isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, sizeof(resp), 10, 10, 0, &eof_time);
+ memcpy(readdata, resp, sizeof(resp));
+
+ return isOK;
+}
+
+
+void iClass_ReadBlk(uint8_t blockno) {
+
+ LED_A_ON();
+
+ uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0};
+ bool isOK = false;
+ isOK = iClass_ReadBlock(blockno, readblockdata);
+ cmd_send(CMD_ACK, isOK, 0, 0, readblockdata, 8);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_D_OFF();
+
+ LED_A_OFF();
}
+void iClass_Dump(uint8_t blockno, uint8_t numblks) {
+
+ LED_A_ON();
+
+ uint8_t readblockdata[] = {0,0,0,0,0,0,0,0,0,0};
+ bool isOK = false;
+ uint8_t blkCnt = 0;
+
+ BigBuf_free();
+ uint8_t *dataout = BigBuf_malloc(255*8);
+ if (dataout == NULL) {
+ Dbprintf("out of memory");
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ cmd_send(CMD_ACK, 0, 1, 0, 0, 0);
+ LED_A_OFF();
+ return;
+ }
+ memset(dataout, 0xFF, 255*8);
+
+ for ( ; blkCnt < numblks; blkCnt++) {
+ isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata);
+ if (!isOK || (readblockdata[0] == 0xBB || readblockdata[7] == 0xBB || readblockdata[2] == 0xBB)) { //try again
+ isOK = iClass_ReadBlock(blockno+blkCnt, readblockdata);
+ if (!isOK) {
+ Dbprintf("Block %02X failed to read", blkCnt+blockno);
+ break;
+ }
+ }
+ memcpy(dataout + (blkCnt*8), readblockdata, 8);
+ }
+ //return pointer to dump memory in arg3
+ cmd_send(CMD_ACK, isOK, blkCnt, BigBuf_max_traceLen(), 0, 0);
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ BigBuf_free();
+
+ LED_A_OFF();
+}
+
+
+static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) {
+
+ LED_A_ON();
+
+ uint8_t write[] = { ICLASS_CMD_UPDATE, blockNo, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ //uint8_t readblockdata[10];
+ //write[1] = blockNo;
+ memcpy(write+2, data, 12); // data + mac
+ char *wrCmd = (char *)(write+1);
+ uint16_t wrCrc = iclass_crc16(wrCmd, 13);
+ write[14] = wrCrc >> 8;
+ write[15] = wrCrc & 0xff;
+ uint8_t resp[10];
+ bool isOK = false;
+ uint32_t eof_time = 0;
+
+ isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10, 10, 0, &eof_time);
+ uint32_t start_time = eof_time + DELAY_ICLASS_VICC_TO_VCD_READER;
+ if (isOK) { //if reader responded correctly
+ //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]);
+ if (memcmp(write+2, resp, 8)) { //if response is not equal to write values
+ 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)
+ //error try again
+ isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10, 10, start_time, &eof_time);
+ }
+ }
+ }
+
+ LED_A_OFF();
+
+ return isOK;
+}
+
+
+void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) {
+
+ LED_A_ON();
+
+ bool isOK = iClass_WriteBlock_ext(blockNo, data);
+ if (isOK){
+ Dbprintf("Write block [%02x] successful", blockNo);
+ } else {
+ Dbprintf("Write block [%02x] failed", blockNo);
+ }
+ cmd_send(CMD_ACK, isOK, 0, 0, 0, 0);
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+
+ LED_A_OFF();
+}
+
+void iClass_Clone(uint8_t startblock, uint8_t endblock, uint8_t *data) {
+ int i;
+ int written = 0;
+ int total_block = (endblock - startblock) + 1;
+ for (i = 0; i < total_block; i++) {
+ // block number
+ if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){
+ Dbprintf("Write block [%02x] successful", i + startblock);
+ written++;
+ } else {
+ if (iClass_WriteBlock_ext(i+startblock, data + (i*12))){
+ Dbprintf("Write block [%02x] successful", i + startblock);
+ written++;
+ } else {
+ Dbprintf("Write block [%02x] failed", i + startblock);
+ }
+ }
+ }
+ if (written == total_block)
+ Dbprintf("Clone complete");
+ else
+ Dbprintf("Clone incomplete");
+
+ cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_D_OFF();
+ LED_A_OFF();
+}