//-----------------------------------------------------------------------------
// 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!!
//-----------------------------------------------------------------------------
//
// 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 "common.h"
+#include "cmd.h"
+#include "iso14443a.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"
static int timeout = 4096;
-
-static int SendIClassAnswer(uint8_t *resp, int respLen, int delay);
-
//-----------------------------------------------------------------------------
// The software UART that receives commands from the reader, and its state
// 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 OutOfNDecoding(int bit)
-{
+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;
}
}
- }
- 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) {
+
+ if (!bit) {
+ if (Uart.dropPosition) {
+ if (Uart.state == STATE_START_OF_COMMUNICATION) {
//error = 1;
- }
- else {
+ } 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 {
+ } 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 {
+ } 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 {
+ } else {
Uart.highCnt = 0;
}
- }
- else {
- if(Uart.highCnt < 8) {
- Uart.highCnt++;
- }
+ } else if (Uart.highCnt < 8) {
+ Uart.highCnt++;
}
}
- return FALSE;
+ return false;
}
+
//=============================================================================
// 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
+ Demod.posCount = 1; // This is the first half bit period, so after syncing handle the second part
- 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...
+ if (Demod.posCount) {
+ //if (trigger) LED_A_OFF(); // Not useful in this case...
switch(Demod.syncBit) {
case 0x08: Demod.samples = 3; break;
case 0x04: Demod.samples = 2; 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 {
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) {
+ 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) {
+ //else if (modulation) {
+ 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 {
+// error = 0x0f;
+ return true;
+ } else {
Demod.state = DEMOD_ERROR_WAIT;
error = 0x33;
}
- /*if(Demod.state!=DEMOD_ERROR_WAIT) {
+ /*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) {
+ if (Demod.sub == SUB_BOTH) {
//Demod.state = DEMOD_MANCHESTER_D;
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_MANCHESTER_D;
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) {
+ /*if (Demod.bitCount>=9) {
Demod.output[Demod.len] = Demod.shiftReg & 0xff;
Demod.len++;
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;
}
//=============================================================================
// triggering so that we start recording at the point that the tag is moved
// near the reader.
//-----------------------------------------------------------------------------
-void RAMFUNC SnoopIClass(void)
-{
+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
- // 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 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 *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
- // The response (tag -> reader) that we're receiving.
- uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
-
- // reset traceLen to 0
- iso14a_set_tracing(TRUE);
- iso14a_clear_trace();
- iso14a_set_trigger(FALSE);
-
- // 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;
-
- // Set up the demodulator for tag -> reader responses.
+ #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;
+ 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);
+ // 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));
+ // And the reader -> tag commands
+ memset(&Uart, 0, sizeof(Uart));
Uart.output = readerToTagCmd;
- Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
- Uart.state = STATE_UNSYNCD;
+ 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);
+ // 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;
- 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;
-
- 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;
- LED_C_ON();
-
- //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;
- if(tracing)
- {
- LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, Uart.parityBits,TRUE);
- LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, TRUE);
+ // 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;
- /* 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;
+ if (smpl & 0xF) {
+ decbyte ^= (1 << (3 - div));
}
- decbyter = 0;
- }
- if(div > 3) {
- smpl = decbyte;
- if(ManchesterDecoding(smpl & 0x0F)) {
- rsamples = samples - Demod.samples;
- LED_B_ON();
+ // FOR READER SIDE COMMUMICATION...
- if(tracing)
- {
- LogTrace(Demod.output,Demod.len, (GetCountSspClk()-time_0) << 4 , Demod.parityBits,FALSE);
- LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, FALSE);
+ 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;
+ LED_C_ON();
+
+ //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(Uart.output, Uart.byteCnt, time_start, time_stop, 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;
+ LED_B_OFF();
+ 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;
- // And ready to receive another response.
- memset(&Demod, 0, sizeof(Demod));
- Demod.output = tagToReaderResponse;
- Demod.state = DEMOD_UNSYNCD;
- LED_C_OFF();
+ rsamples = samples - Demod.samples;
+ LED_B_ON();
+
+ uint8_t parity[MAX_PARITY_SIZE];
+ GetParity(Demod.output, Demod.len, parity);
+ LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, false);
+
+ // And ready to receive another response.
+ memset(&Demod, 0, sizeof(Demod));
+ Demod.output = tagToReaderResponse;
+ Demod.state = DEMOD_UNSYNCD;
+ LED_C_OFF();
+ } else {
+ time_start = (GetCountSspClk()-time_0) << 4;
+ }
+
+ div = 0;
+ decbyte = 0x00;
}
-
- div = 0;
- decbyte = 0x00;
- }
- //}
- if(BUTTON_PRESS()) {
- DbpString("cancelled_a");
- goto done;
- }
- }
+ if (BUTTON_PRESS()) {
+ DbpString("cancelled_a");
+ goto done;
+ }
+ }
- DbpString("COMMAND FINISHED");
+ DbpString("COMMAND FINISHED");
- Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
- Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+ 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, traceLen, (int)Uart.output[0]);
- LED_A_OFF();
- LED_B_OFF();
- LED_C_OFF();
- LED_D_OFF();
+ 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++) {
+ int i;
+ for (i = 0; i < 8; i++) {
rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5);
}
}
//-----------------------------------------------------------------------------
// Wait for commands from reader
// Stop when button is pressed
-// Or return TRUE when command is captured
+// Or return true when command is captured
//-----------------------------------------------------------------------------
static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
{
- // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
- // only, since we are receiving, not transmitting).
- // Signal field is off with the appropriate LED
- LED_D_OFF();
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
- // Now run a `software UART' on the stream of incoming samples.
- Uart.output = received;
- Uart.byteCntMax = maxLen;
- Uart.state = STATE_UNSYNCD;
-
- for(;;) {
- WDT_HIT();
-
- if(BUTTON_PRESS()) return FALSE;
-
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
- AT91C_BASE_SSC->SSC_THR = 0x00;
- }
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
- /*if(OutOfNDecoding((b & 0xf0) >> 4)) {
- *len = Uart.byteCnt;
- return TRUE;
- }*/
- if(OutOfNDecoding(b & 0x0f)) {
+ // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
+ // only, since we are receiving, not transmitting).
+ // Signal field is off with the appropriate LED
+ LED_D_OFF();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+ // Now run a `software UART' on the stream of incoming samples.
+ Uart.output = received;
+ Uart.byteCntMax = maxLen;
+ Uart.state = STATE_UNSYNCD;
+
+ for (;;) {
+ WDT_HIT();
+
+ if (BUTTON_PRESS()) return false;
+
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x00;
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+
+ if (OutOfNDecoding(b & 0x0f)) {
*len = Uart.byteCnt;
- return TRUE;
+ return true;
}
- }
- }
+ }
+ }
}
+static uint8_t encode4Bits(const uint8_t b) {
+ uint8_t c = b & 0xF;
+ // OTA, the least significant bits first
+ // The columns are
+ // 1 - Bit value to send
+ // 2 - Reversed (big-endian)
+ // 3 - Encoded
+ // 4 - Hex values
+
+ switch(c){
+ // 1 2 3 4
+ case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
+ case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
+ case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
+ case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
+ case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
+ case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
+ case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
+ case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
+ case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
+ case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
+ case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
+ case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
+ case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
+ case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
+ case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
+ default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
+
+ }
+}
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
-static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
-{
- //So far a dummy implementation, not used
- //int lastProxToAirDuration =0;
+static void CodeIClassTagAnswer(const uint8_t *cmd, int len) {
+
+ /*
+ * SOF comprises 3 parts;
+ * * An unmodulated time of 56.64 us
+ * * 24 pulses of 423.75 kHz (fc/32)
+ * * A logic 1, which starts with an unmodulated time of 18.88us
+ * followed by 8 pulses of 423.75kHz (fc/32)
+ *
+ *
+ * EOF comprises 3 parts:
+ * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
+ * time of 18.88us.
+ * - 24 pulses of fc/32
+ * - An unmodulated time of 56.64 us
+ *
+ *
+ * A logic 0 starts with 8 pulses of fc/32
+ * followed by an unmodulated time of 256/fc (~18,88us).
+ *
+ * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
+ * 8 pulses of fc/32 (also 18.88us)
+ *
+ * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag,
+ * works like this.
+ * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
+ * - A 0-bit input to the FPGA becomes an unmodulated time of 18.88us
+ *
+ * In this mode the SOF can be written as 00011101 = 0x1D
+ * The EOF can be written as 10111000 = 0xb8
+ * A logic 1 is 01
+ * A logic 0 is 10
+ *
+ * */
+
int i;
ToSendReset();
// Send SOF
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
+ ToSend[++ToSendMax] = 0x1D;
- for(i = 0; i < len; i++) {
- int j;
+ for (i = 0; i < len; i++) {
uint8_t b = cmd[i];
-
- // Data bits
- for(j = 0; j < 8; j++) {
- if(b & 1) {
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- } else {
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- }
- b >>= 1;
- }
+ ToSend[++ToSendMax] = encode4Bits(b & 0xF); // Least significant half
+ ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF); // Most significant half
}
// Send EOF
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
-
+ ToSend[++ToSendMax] = 0xB8;
//lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
-
// Convert from last byte pos to length
ToSendMax++;
}
-// Only SOF
-static void CodeIClassTagSOF()
-{
+// Only SOF
+static void CodeIClassTagSOF() {
//So far a dummy implementation, not used
//int lastProxToAirDuration =0;
ToSendReset();
// Send SOF
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
-
-// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
+ ToSend[++ToSendMax] = 0x1D;
+// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
-
// Convert from last byte pos to length
ToSendMax++;
}
-/**
- * @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)
-{
- uint32_t simType = arg0;
- uint32_t numberOfCSNS = arg1;
-
- // Enable and clear the trace
- iso14a_set_tracing(TRUE);
- iso14a_clear_trace();
+static void AppendCrc(uint8_t *data, int len) {
+ ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1);
+}
- uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) {
+ int i = 0, d = 0;//, u = 0, d = 0;
+ uint8_t b = 0;
- if(simType == 0) {
- // Use the CSN from commandline
- memcpy(csn_crc, datain, 8);
- doIClassSimulation(csn_crc,0);
- }else if(simType == 1)
- {
- doIClassSimulation(csn_crc,0);
- }
- else if(simType == 2)
- {
- Dbprintf("Going into attack mode");
- // 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 offlne-attack
- // in order to obtain the keys, as in the "dismantling iclass"-paper.
- for(int i = 0 ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
- {
- // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
+ //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K_8BIT);
- memcpy(csn_crc, datain+(i*8), 8);
- if(doIClassSimulation(csn_crc,1))
- {
- return; // Button pressed
+ AT91C_BASE_SSC->SSC_THR = 0x00;
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
+ while (!BUTTON_PRESS()) {
+ if ((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){
+ b = AT91C_BASE_SSC->SSC_RHR; (void) b;
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){
+ b = 0x00;
+ if (d < delay) {
+ d++;
+ }
+ else {
+ if (i < respLen) {
+ b = resp[i];
+ //Hack
+ //b = 0xAC;
+ }
+ i++;
}
+ AT91C_BASE_SSC->SSC_THR = b;
}
- }
- 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");
+
+// if (i > respLen +4) break;
+ if (i > respLen + 1) break;
}
+ return 0;
}
+
+
+#define MODE_SIM_CSN 0
+#define MODE_EXIT_AFTER_MAC 1
+#define MODE_FULLSIM 2
+
/**
* @brief Does the actual simulation
* @param csn - csn to use
* @param breakAfterMacReceived if true, returns after reader MAC has been received.
*/
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived)
-{
-
+int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
+ // free eventually allocated BigBuf memory
+ BigBuf_free_keep_EM();
+
+ State cipher_state;
+// State cipher_state_reserve;
+ uint8_t *csn = BigBuf_get_EM_addr();
+ uint8_t *emulator = csn;
+ uint8_t sof_data[] = { 0x0F} ;
// CSN followed by two CRC bytes
- uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
- memcpy(response3,csn,sizeof(response3));
- 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]);
- // e-Purse
- uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ uint8_t anticoll_data[10] = { 0 };
+ uint8_t csn_data[10] = { 0 };
+ 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(response3,response2);
+ rotateCSN(csn_data, anticoll_data);
// Compute CRC on both CSNs
- ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
- ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
+ ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
+ ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+
+ uint8_t diversified_key[8] = { 0 };
+ // e-Purse
+ uint8_t card_challenge_data[8] = { 0x00 };
+ if (simulationMode == MODE_FULLSIM) {
+ //The diversified key should be stored on block 3
+ //Get the diversified key from emulator memory
+ memcpy(diversified_key, emulator + (8*3), 8);
+ //Card challenge, a.k.a e-purse is on block 2
+ memcpy(card_challenge_data, emulator + (8 * 2), 8);
+ //Precalculate the cipher state, feeding it the CC
+ cipher_state = opt_doTagMAC_1(card_challenge_data, diversified_key);
+ }
int exitLoop = 0;
// Reader 0a
// Reader 81 anticoll. CSN
// Tag CSN
- uint8_t *resp;
- int respLen;
- uint8_t* respdata = NULL;
- int respsize = 0;
- uint8_t sof = 0x0f;
+ uint8_t *modulated_response;
+ int modulated_response_size = 0;
+ uint8_t *trace_data = NULL;
+ int trace_data_size = 0;
- // Respond SOF -- takes 8 bytes
- uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
- int resp1Len;
+ // Respond SOF -- takes 1 bytes
+ uint8_t *resp_sof = BigBuf_malloc(2);
+ int resp_sof_Len;
// Anticollision CSN (rotated CSN)
- // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
- uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 10);
- int resp2Len;
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_anticoll = BigBuf_malloc(28);
+ int resp_anticoll_len;
// CSN
- // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
- uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 190);
- int resp3Len;
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_csn = BigBuf_malloc(30);
+ int resp_csn_len;
// e-Purse
- // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)
- uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);
- int resp4Len;
+ // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
+ uint8_t *resp_cc = BigBuf_malloc(20);
+ int resp_cc_len;
- // + 1720..
- uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
- memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+ uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
int len;
// Prepare card messages
// First card answer: SOF
CodeIClassTagSOF();
- memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+ memcpy(resp_sof, ToSend, ToSendMax);
+ resp_sof_Len = ToSendMax;
// Anticollision CSN
- CodeIClassTagAnswer(response2, sizeof(response2));
- memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+ CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+ memcpy(resp_anticoll, ToSend, ToSendMax);
+ resp_anticoll_len = ToSendMax;
// CSN
- CodeIClassTagAnswer(response3, sizeof(response3));
- memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
+ CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+ memcpy(resp_csn, ToSend, ToSendMax);
+ resp_csn_len = ToSendMax;
// e-Purse
- CodeIClassTagAnswer(response4, sizeof(response4));
- memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
+ CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;
+ //This is used for responding to READ-block commands or other data which is dynamically generated
+ //First the 'trace'-data, not encoded for FPGA
+ uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer
+ //Then storage for the modulated data
+ //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes)
+ uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2);
// Start from off (no field generated)
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- SpinDelay(200);
-
-
+ //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ //SpinDelay(200);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+ SpinDelay(100);
+ StartCountSspClk();
// We need to listen to the high-frequency, peak-detected path.
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
- FpgaSetupSsc();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
// To control where we are in the protocol
int cmdsRecvd = 0;
uint32_t r2t_time =0;
LED_A_ON();
- bool displayDebug = true;
bool buttonPressed = false;
- while(!exitLoop) {
- displayDebug = true;
-
+ uint8_t response_delay = 1;
+ while (!exitLoop) {
+ response_delay = 1;
LED_B_OFF();
//Signal tracer
// Can be used to get a trigger for an oscilloscope..
LED_C_OFF();
- if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
+ if (!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
buttonPressed = true;
break;
}
LED_C_ON();
// Okay, look at the command now.
- if(receivedCmd[0] == 0x0a ) {
+ if (receivedCmd[0] == ICLASS_CMD_ACTALL) {
// Reader in anticollission phase
- resp = resp1; respLen = resp1Len; //order = 1;
- respdata = &sof;
- respsize = sizeof(sof);
- displayDebug = false;
- } else if(receivedCmd[0] == 0x0c) {
+ modulated_response = resp_sof;
+ modulated_response_size = resp_sof_Len; //order = 1;
+ trace_data = sof_data;
+ trace_data_size = sizeof(sof_data);
+ } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) {
// Reader asks for anticollission CSN
- resp = resp2; respLen = resp2Len; //order = 2;
- respdata = response2;
- respsize = sizeof(response2);
- //displayDebug = false;
+ modulated_response = resp_anticoll;
+ modulated_response_size = resp_anticoll_len; //order = 2;
+ trace_data = anticoll_data;
+ trace_data_size = sizeof(anticoll_data);
//DbpString("Reader requests anticollission CSN:");
- } else if(receivedCmd[0] == 0x81) {
+ } else if (receivedCmd[0] == ICLASS_CMD_SELECT) {
// Reader selects anticollission CSN.
// Tag sends the corresponding real CSN
- resp = resp3; respLen = resp3Len; //order = 3;
- respdata = response3;
- respsize = sizeof(response3);
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len; //order = 3;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
//DbpString("Reader selects anticollission CSN:");
- } else if(receivedCmd[0] == 0x88) {
+ } else if (receivedCmd[0] == ICLASS_CMD_READCHECK_KD) {
// Read e-purse (88 02)
- resp = resp4; respLen = resp4Len; //order = 4;
- respdata = response4;
- respsize = sizeof(response4);
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len; //order = 4;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
LED_B_ON();
- } else if(receivedCmd[0] == 0x05) {
+ } else if (receivedCmd[0] == ICLASS_CMD_CHECK) {
// Reader random and reader MAC!!!
- // Do not respond
- // We do not know what to answer, so lets keep quit
- resp = resp1; respLen = 0; //order = 5;
- respdata = NULL;
- respsize = 0;
- if (breakAfterMacReceived){
- // TODO, actually return this to the caller instead of just
- // dbprintf:ing ...
- Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x");
- Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
- receivedCmd[0], receivedCmd[1], receivedCmd[2],
- receivedCmd[3], receivedCmd[4], receivedCmd[5],
- receivedCmd[6], receivedCmd[7], receivedCmd[8]);
- exitLoop = true;
+ if (simulationMode == MODE_FULLSIM) {
+ //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;
+ CodeIClassTagAnswer(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ response_delay = 0; //We need to hurry here... (but maybe not too much... ??)
+ //exitLoop = true;
+ } else { //Not fullsim, we don't respond
+ // We do not know what to answer, so lets keep quiet
+ modulated_response = resp_sof;
+ modulated_response_size = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+ if (simulationMode == MODE_EXIT_AFTER_MAC) {
+ // dbprintf:ing ...
+ Dbprintf("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]);
+ Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
+ receivedCmd[0], receivedCmd[1], receivedCmd[2],
+ receivedCmd[3], receivedCmd[4], receivedCmd[5],
+ receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+ if (reader_mac_buf != NULL) {
+ memcpy(reader_mac_buf, receivedCmd+1, 8);
+ }
+ exitLoop = true;
+ }
}
- } else if(receivedCmd[0] == 0x00 && len == 1) {
+
+ } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
// Reader ends the session
- resp = resp1; respLen = 0; //order = 0;
- respdata = NULL;
- respsize = 0;
+ modulated_response = resp_sof;
+ modulated_response_size = 0; //order = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+ } else if (simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) {
+ //Read block
+ uint16_t blk = receivedCmd[1];
+ //Take the data...
+ memcpy(data_generic_trace, emulator + (blk << 3), 8);
+ //Add crc
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIClassTagAnswer(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 && simulationMode == MODE_FULLSIM) {
+ //Probably the reader wants to update the nonce. Let's just ignore that for now.
+ // OBS! If this is implemented, don't forget to regenerate the cipher_state
+ //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|
+
+ //Take the data...
+ memcpy(data_generic_trace, receivedCmd+2, 8);
+ //Add crc
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIClassTagAnswer(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) {
+ //Pagesel
+ //Pagesel enables to select a page in the selected chip memory and return its configuration block
+ //Chips with a single page will not answer to this command
+ // It appears we're fine ignoring this.
+ //Otherwise, we should answer 8bytes (block) + 2bytes CRC
} else {
//#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
// Never seen this command before
receivedCmd[3], receivedCmd[4], receivedCmd[5],
receivedCmd[6], receivedCmd[7], receivedCmd[8]);
// Do not respond
- resp = resp1; respLen = 0; //order = 0;
- respdata = NULL;
- respsize = 0;
+ modulated_response = resp_sof;
+ modulated_response_size = 0; //order = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
}
- if(cmdsRecvd > 100) {
+ if (cmdsRecvd > 100) {
//DbpString("100 commands later...");
- break;
- }
- else {
+ //break;
+ } else {
cmdsRecvd++;
}
-
- if(respLen > 0) {
- SendIClassAnswer(resp, respLen, 21);
+ /**
+ A legit tag has about 380us delay between reader EOT and tag SOF.
+ **/
+ if (modulated_response_size > 0) {
+ SendIClassAnswer(modulated_response, modulated_response_size, response_delay);
t2r_time = GetCountSspClk();
-
-// }
- if(displayDebug) Dbprintf("R2T:(len=%d): %x %x %x %x %x %x %x %x %x\nT2R: (total/data =%d/%d): %x %x %x %x %x %x %x %x %x",
- len,
- receivedCmd[0], receivedCmd[1], receivedCmd[2],
- receivedCmd[3], receivedCmd[4], receivedCmd[5],
- receivedCmd[6], receivedCmd[7], receivedCmd[8],
- respLen,respsize,
- resp[0], resp[1], resp[2],
- resp[3], resp[4], resp[5],
- resp[6], resp[7], resp[8]);
-
}
- if (tracing) {
- //LogTrace(receivedCmd,len, rsamples, Uart.parityBits, TRUE);
-
- LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE);
- LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE);
-
- if (respdata != NULL) {
- //LogTrace(respdata,respsize, rsamples, SwapBits(GetParity(respdata,respsize),respsize), FALSE);
- //if(!LogTrace(resp,respLen, rsamples,SwapBits(GetParity(respdata,respsize),respsize),FALSE))
- LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE);
- LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE);
-
-
- }
- if(!tracing) {
- DbpString("Trace full");
- //break;
- }
+ uint8_t parity[MAX_PARITY_SIZE];
+ GetParity(receivedCmd, len, parity);
+ LogTrace(receivedCmd, len, (r2t_time-time_0) << 4, (r2t_time-time_0) << 4, parity, true);
+ if (trace_data != NULL) {
+ GetParity(trace_data, trace_data_size, parity);
+ LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, false);
+ }
+ if (!get_tracing()) {
+ DbpString("Trace full");
+ //break;
}
- memset(receivedCmd, 0x44, RECV_CMD_SIZE);
}
- Dbprintf("%x", cmdsRecvd);
+ //Dbprintf("%x", cmdsRecvd);
LED_A_OFF();
LED_B_OFF();
- if(buttonPressed)
+ LED_C_OFF();
+
+ if (buttonPressed)
{
DbpString("Button pressed");
}
return buttonPressed;
}
-static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
-{
- int i = 0, d=0;//, u = 0, d = 0;
- uint8_t b = 0;
+/**
+ * @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) {
+ uint32_t simType = arg0;
+ uint32_t numberOfCSNS = arg1;
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+ // Enable and clear the trace
+ set_tracing(true);
+ clear_trace();
+ //Use the emulator memory for SIM
+ uint8_t *emulator = BigBuf_get_EM_addr();
- AT91C_BASE_SSC->SSC_THR = 0x00;
- FpgaSetupSsc();
- while(!BUTTON_PRESS()) {
- if((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){
- b = AT91C_BASE_SSC->SSC_RHR; (void) b;
- }
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){
- b = 0x00;
- if(d < delay) {
- d++;
- }
- else {
- if( i < respLen){
- b = resp[i];
- //Hack
- //b = 0xAC;
- }
- i++;
+ if (simType == 0) {
+ // Use the CSN from commandline
+ memcpy(emulator, datain, 8);
+ doIClassSimulation(MODE_SIM_CSN,NULL);
+ } else if (simType == 1) {
+ //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(MODE_SIM_CSN,NULL);
+ } else if (simType == 2) {
+ 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 offlne-attack
+ // in order to obtain the keys, as in the "dismantling iclass"-paper.
+ int i = 0;
+ for ( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++) {
+ // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
+ memcpy(emulator, datain+(i*8), 8);
+ if (doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8)) {
+ cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8);
+ return; // Button pressed
}
- AT91C_BASE_SSC->SSC_THR = b;
}
-
- if (i > respLen +4) break;
+ cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8);
+ } else if (simType == 3) {
+ //This is 'full sim' mode, where we use the emulator storage for data.
+ doIClassSimulation(MODE_FULLSIM, 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...");
- return 0;
}
+
/// THE READER CODE
//-----------------------------------------------------------------------------
// Transmit the command (to the tag) that was placed in ToSend[].
//-----------------------------------------------------------------------------
-static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait)
-{
- int c;
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
- AT91C_BASE_SSC->SSC_THR = 0x00;
- FpgaSetupSsc();
-
- if (wait)
- if(*wait < 10)
- *wait = 10;
-
- for(c = 0; c < *wait;) {
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
- AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing!
- c++;
- }
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
- (void)r;
- }
- WDT_HIT();
- }
-
- uint8_t sendbyte;
- bool firstpart = TRUE;
- c = 0;
- for(;;) {
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
-
- // DOUBLE THE SAMPLES!
- if(firstpart) {
- sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4);
- }
- else {
- sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4);
- c++;
- }
- if(sendbyte == 0xff) {
- sendbyte = 0xfe;
- }
- AT91C_BASE_SSC->SSC_THR = sendbyte;
- firstpart = !firstpart;
-
- if(c >= len) {
- break;
- }
- }
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
- (void)r;
- }
- WDT_HIT();
- }
- if (samples) *samples = (c + *wait) << 3;
+static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait) {
+ int c;
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+ AT91C_BASE_SSC->SSC_THR = 0x00;
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
+
+ if (wait) {
+ if (*wait < 10) *wait = 10;
+
+ for (c = 0; c < *wait;) {
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing!
+ c++;
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+ (void)r;
+ }
+ WDT_HIT();
+ }
+ }
+
+ uint8_t sendbyte;
+ bool firstpart = true;
+ c = 0;
+ for (;;) {
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+
+ // DOUBLE THE SAMPLES!
+ if (firstpart) {
+ sendbyte = (cmd[c] & 0xf0) | (cmd[c] >> 4);
+ } else {
+ sendbyte = (cmd[c] & 0x0f) | (cmd[c] << 4);
+ c++;
+ }
+ if (sendbyte == 0xff) {
+ sendbyte = 0xfe;
+ }
+ AT91C_BASE_SSC->SSC_THR = sendbyte;
+ firstpart = !firstpart;
+
+ if (c >= len) {
+ break;
+ }
+ }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+ (void)r;
+ }
+ WDT_HIT();
+ }
+ if (samples && wait) *samples = (c + *wait) << 3;
}
//-----------------------------------------------------------------------------
// Prepare iClass reader command to send to FPGA
//-----------------------------------------------------------------------------
-void CodeIClassCommand(const uint8_t * cmd, int len)
-{
- int i, j, k;
- uint8_t b;
-
- ToSendReset();
-
- // Start of Communication: 1 out of 4
- ToSend[++ToSendMax] = 0xf0;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x0f;
- ToSend[++ToSendMax] = 0x00;
-
- // Modulate the bytes
- for (i = 0; i < len; i++) {
- b = cmd[i];
- for(j = 0; j < 4; j++) {
- for(k = 0; k < 4; k++) {
- if(k == (b & 3)) {
- ToSend[++ToSendMax] = 0x0f;
- }
- else {
- ToSend[++ToSendMax] = 0x00;
+void CodeIClassCommand(const uint8_t *cmd, int len) {
+ int i, j, k;
+
+ ToSendReset();
+
+ // Start of Communication: 1 out of 4
+ ToSend[++ToSendMax] = 0xf0;
+ ToSend[++ToSendMax] = 0x00;
+ ToSend[++ToSendMax] = 0x0f;
+ ToSend[++ToSendMax] = 0x00;
+
+ // Modulate the bytes
+ for (i = 0; i < len; i++) {
+ uint8_t b = cmd[i];
+ for (j = 0; j < 4; j++) {
+ for (k = 0; k < 4; k++) {
+ if (k == (b & 3)) {
+ ToSend[++ToSendMax] = 0xf0;
+ } else {
+ ToSend[++ToSendMax] = 0x00;
+ }
}
- }
- b >>= 2;
- }
- }
-
- // End of Communication
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xf0;
- ToSend[++ToSendMax] = 0x00;
-
- // Convert from last character reference to length
- ToSendMax++;
+ b >>= 2;
+ }
+ }
+
+ // End of Communication
+ ToSend[++ToSendMax] = 0x00;
+ ToSend[++ToSendMax] = 0x00;
+ ToSend[++ToSendMax] = 0xf0;
+ ToSend[++ToSendMax] = 0x00;
+
+ // Convert from last character reference to length
+ ToSendMax++;
}
-void ReaderTransmitIClass(uint8_t* frame, int len)
-{
- int wait = 0;
- int samples = 0;
- int par = 0;
+static void ReaderTransmitIClass(uint8_t *frame, int len) {
+ int wait = 0;
+ int samples = 0;
- // This is tied to other size changes
- // uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024;
- CodeIClassCommand(frame,len);
+ // This is tied to other size changes
+ CodeIClassCommand(frame, len);
- // Select the card
- TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait);
- if(trigger)
- LED_A_ON();
+ // Select the card
+ TransmitIClassCommand(ToSend, ToSendMax, &samples, &wait);
+ if (trigger)
+ LED_A_ON();
- // Store reader command in buffer
- if (tracing) LogTrace(frame,len,rsamples,par,TRUE);
+ // Store reader command in buffer
+ uint8_t par[MAX_PARITY_SIZE];
+ GetParity(frame, len, par);
+ LogTrace(frame, len, rsamples, rsamples, par, true);
}
//-----------------------------------------------------------------------------
// Wait a certain time for tag response
-// If a response is captured return TRUE
-// If it takes too long return FALSE
+// If a response is captured return true
+// If it takes too long return false
//-----------------------------------------------------------------------------
-static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) //uint8_t *buffer
-{
+static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed) {
+ //uint8_t *buffer
// buffer needs to be 512 bytes
int c;
uint8_t b;
if (elapsed) *elapsed = 0;
- bool skip = FALSE;
+ bool skip = false;
c = 0;
- for(;;) {
+ for (;;) {
WDT_HIT();
- if(BUTTON_PRESS()) return FALSE;
+ if (BUTTON_PRESS()) return false;
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
AT91C_BASE_SSC->SSC_THR = 0x00; // To make use of exact timing of next command from reader!!
if (elapsed) (*elapsed)++;
}
- if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- if(c < timeout) { c++; } else { return FALSE; }
+ if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ if (c < timeout) {
+ c++;
+ } else {
+ return false;
+ }
b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
skip = !skip;
- if(skip) continue;
- /*if(ManchesterDecoding((b>>4) & 0xf)) {
- *samples = ((c - 1) << 3) + 4;
- return TRUE;
- }*/
- if(ManchesterDecoding(b & 0x0f)) {
+ if (skip) continue;
+
+ if (ManchesterDecoding(b & 0x0f)) {
*samples = c << 3;
- return TRUE;
+ return true;
}
}
}
}
-int ReaderReceiveIClass(uint8_t* receivedAnswer)
-{
- int samples = 0;
- if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;
- rsamples += samples;
- if (tracing) LogTrace(receivedAnswer,Demod.len,rsamples,Demod.parityBits,FALSE);
- if(samples == 0) return FALSE;
- return Demod.len;
+static int ReaderReceiveIClass(uint8_t *receivedAnswer) {
+ int samples = 0;
+ if (!GetIClassAnswer(receivedAnswer, 160, &samples, 0)) {
+ return false;
+ }
+ rsamples += samples;
+ uint8_t parity[MAX_PARITY_SIZE];
+ GetParity(receivedAnswer, Demod.len, parity);
+ LogTrace(receivedAnswer, Demod.len, rsamples, rsamples, parity, false);
+ if (samples == 0) return false;
+ return Demod.len;
}
-// Reader iClass Anticollission
-void ReaderIClass(uint8_t arg0) {
- uint8_t act_all[] = { 0x0a };
- uint8_t identify[] = { 0x0c };
- uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-
- uint8_t* resp = (((uint8_t *)BigBuf) + 3560); // was 3560 - tied to other size changes
-
+static void setupIclassReader() {
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Reset trace buffer
- memset(trace, 0x44, RECV_CMD_OFFSET);
- traceLen = 0;
+ set_tracing(true);
+ clear_trace();
// Setup SSC
- FpgaSetupSsc();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);
// Start from off (no field generated)
// Signal field is off with the appropriate LED
LED_D_OFF();
// Signal field is on with the appropriate LED
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
SpinDelay(200);
-
LED_A_ON();
- for(;;) {
-
- if(traceLen > TRACE_SIZE) {
+}
+
+static bool sendCmdGetResponseWithRetries(uint8_t* command, size_t cmdsize, uint8_t* resp, uint8_t expected_size, uint8_t retries) {
+ while (retries-- > 0) {
+ ReaderTransmitIClass(command, cmdsize);
+ if (expected_size == ReaderReceiveIClass(resp)) {
+ return true;
+ }
+ }
+ return false;//Error
+}
+
+/**
+ * @brief Talks to an iclass tag, sends the commands to get CSN and CC.
+ * @param card_data where the CSN and CC are stored for return
+ * @return 0 = fail
+ * 1 = Got CSN
+ * 2 = Got CSN and CC
+ */
+static uint8_t handshakeIclassTag_ext(uint8_t *card_data, bool use_credit_key) {
+ static uint8_t act_all[] = { 0x0a };
+ //static uint8_t identify[] = { 0x0c };
+ static uint8_t identify[] = { 0x0c, 0x00, 0x73, 0x33 };
+ static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ static uint8_t readcheck_cc[]= { 0x88, 0x02 };
+ if (use_credit_key)
+ readcheck_cc[0] = 0x18;
+ else
+ readcheck_cc[0] = 0x88;
+
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+
+ uint8_t read_status = 0;
+
+ // Send act_all
+ ReaderTransmitIClass(act_all, 1);
+ // Card present?
+ if (!ReaderReceiveIClass(resp)) return read_status;//Fail
+ //Send Identify
+ ReaderTransmitIClass(identify, 1);
+ //We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
+ uint8_t len = ReaderReceiveIClass(resp);
+ if (len != 10) return read_status;//Fail
+
+ //Copy the Anti-collision CSN to our select-packet
+ memcpy(&select[1], resp, 8);
+ //Select the card
+ ReaderTransmitIClass(select, sizeof(select));
+ //We expect a 10-byte response here, 8 byte CSN and 2 byte CRC
+ len = ReaderReceiveIClass(resp);
+ if (len != 10) return read_status;//Fail
+
+ //Success - level 1, we got CSN
+ //Save CSN in response data
+ memcpy(card_data, resp, 8);
+
+ //Flag that we got to at least stage 1, read CSN
+ read_status = 1;
+
+ // Card selected, now read e-purse (cc) (only 8 bytes no CRC)
+ ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+ if (ReaderReceiveIClass(resp) == 8) {
+ //Save CC (e-purse) in response data
+ memcpy(card_data+8, resp, 8);
+ read_status++;
+ }
+
+ return read_status;
+}
+
+static uint8_t handshakeIclassTag(uint8_t *card_data) {
+ return handshakeIclassTag_ext(card_data, false);
+}
+
+
+// Reader iClass Anticollission
+void ReaderIClass(uint8_t arg0) {
+
+ uint8_t card_data[6 * 8] = {0};
+ memset(card_data, 0xFF, sizeof(card_data));
+ uint8_t last_csn[8] = {0,0,0,0,0,0,0,0};
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+ memset(resp, 0xFF, sizeof(resp));
+ //Read conf block CRC(0x01) => 0xfa 0x22
+ uint8_t readConf[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x01, 0xfa, 0x22};
+ //Read App Issuer Area block CRC(0x05) => 0xde 0x64
+ uint8_t readAA[] = { ICLASS_CMD_READ_OR_IDENTIFY, 0x05, 0xde, 0x64};
+
+ int read_status= 0;
+ uint8_t result_status = 0;
+ // flag to read until one tag is found successfully
+ bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
+ // flag to only try 5 times to find one tag then return
+ bool try_once = arg0 & FLAG_ICLASS_READER_ONE_TRY;
+ // if neither abort_after_read nor try_once then continue reading until button pressed.
+
+ bool use_credit_key = arg0 & FLAG_ICLASS_READER_CEDITKEY;
+ // 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);
+ setupIclassReader();
+
+ uint16_t tryCnt = 0;
+ bool userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+ while (!userCancelled) {
+ // if only looking for one card try 2 times if we missed it the first time
+ if (try_once && tryCnt > 2) {
+ break;
+ }
+ tryCnt++;
+ if (!get_tracing()) {
DbpString("Trace full");
break;
}
-
- if (BUTTON_PRESS()) break;
-
- // Send act_all
- ReaderTransmitIClass(act_all, 1);
- // Card present?
- if(ReaderReceiveIClass(resp)) {
- ReaderTransmitIClass(identify, 1);
- if(ReaderReceiveIClass(resp) == 10) {
- // Select card
- memcpy(&select[1],resp,8);
- ReaderTransmitIClass(select, sizeof(select));
-
- if(ReaderReceiveIClass(resp) == 10) {
- Dbprintf(" Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
- resp[0], resp[1], resp[2],
- resp[3], resp[4], resp[5],
- resp[6], resp[7]);
+ WDT_HIT();
+
+ read_status = handshakeIclassTag_ext(card_data, use_credit_key);
+
+ if (read_status == 0) continue;
+ if (read_status == 1) result_status = FLAG_ICLASS_READER_CSN;
+ if (read_status == 2) result_status = FLAG_ICLASS_READER_CSN | FLAG_ICLASS_READER_CC;
+
+ // handshakeIclass returns CSN|CC, but the actual block
+ // layout is CSN|CONFIG|CC, so here we reorder the data,
+ // moving CC forward 8 bytes
+ memcpy(card_data+16, card_data+8, 8);
+ //Read block 1, config
+ if (flagReadConfig) {
+ if (sendCmdGetResponseWithRetries(readConf, sizeof(readConf), resp, 10, 10)) {
+ result_status |= FLAG_ICLASS_READER_CONF;
+ memcpy(card_data+8, resp, 8);
+ } else {
+ Dbprintf("Failed to dump config block");
+ }
+ }
+
+ //Read block 5, AA
+ if (flagReadAA) {
+ if (sendCmdGetResponseWithRetries(readAA, sizeof(readAA), resp, 10, 10)) {
+ result_status |= FLAG_ICLASS_READER_AA;
+ memcpy(card_data + (8*5), resp, 8);
+ } else {
+ //Dbprintf("Failed to dump AA block");
+ }
+ }
+
+ // 0 : CSN
+ // 1 : Configuration
+ // 2 : e-purse
+ // (3,4 write-only, kc and kd)
+ // 5 Application issuer area
+ //
+ //Then we can 'ship' back the 8 * 6 bytes of data,
+ // with 0xFF:s in block 3 and 4.
+
+ LED_B_ON();
+ //Send back to client, but don't bother if we already sent this -
+ // only useful if looping in arm (not try_once && not abort_after_read)
+ if (memcmp(last_csn, card_data, 8) != 0) {
+ // If caller requires that we get Conf, CC, AA, continue until we got it
+ if ( (result_status ^ FLAG_ICLASS_READER_CSN ^ flagReadConfig ^ flagReadCC ^ flagReadAA) == 0) {
+ cmd_send(CMD_ACK, result_status, 0, 0, card_data, sizeof(card_data));
+ if (abort_after_read) {
+ LED_A_OFF();
+ LED_B_OFF();
+ return;
}
- // Card selected, whats next... ;-)
+ //Save that we already sent this....
+ memcpy(last_csn, card_data, 8);
}
+
}
+ LED_B_OFF();
+ userCancelled = BUTTON_PRESS() || usb_poll_validate_length();
+ }
+ if (userCancelled) {
+ cmd_send(CMD_ACK, 0xFF, 0, 0, card_data, 0);
+ } else {
+ cmd_send(CMD_ACK, 0, 0, 0, card_data, 0);
+ }
+ LED_A_OFF();
+}
+
+void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
+
+ 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 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];
+
+ setupIclassReader();
+ set_tracing(true);
+
+ while (!BUTTON_PRESS()) {
+
WDT_HIT();
+
+ if (!get_tracing()) {
+ DbpString("Trace full");
+ break;
+ }
+
+ uint8_t read_status = handshakeIclassTag(card_data);
+ if (read_status < 2) continue;
+
+ //for now replay captured auth (as cc not updated)
+ memcpy(check+5, MAC, 4);
+
+ if (!sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 5)) {
+ 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;
+
+ if (!sendCmdGetResponseWithRetries(read, sizeof(read),resp, 10, 10)) {
+ 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;
+
+ if (sendCmdGetResponseWithRetries(read, sizeof(read), resp, 10, 10)) {
+ 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);
+
LED_A_OFF();
}
+void iClass_ReadCheck(uint8_t blockNo, uint8_t keyType) {
+ uint8_t readcheck[] = { keyType, blockNo };
+ uint8_t resp[] = {0,0,0,0,0,0,0,0};
+ size_t isOK = 0;
+ isOK = sendCmdGetResponseWithRetries(readcheck, sizeof(readcheck), resp, sizeof(resp), 6);
+ cmd_send(CMD_ACK,isOK, 0, 0, 0, 0);
+}
+
+void iClass_Authentication(uint8_t *MAC) {
+ uint8_t check[] = { ICLASS_CMD_CHECK, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ uint8_t resp[ICLASS_BUFFER_SIZE];
+ memcpy(check+5, MAC, 4);
+ bool isOK;
+ isOK = sendCmdGetResponseWithRetries(check, sizeof(check), resp, 4, 6);
+ cmd_send(CMD_ACK,isOK, 0, 0, 0, 0);
+}
+
+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[] = {0,0,0,0,0,0,0,0,0,0};
+ bool isOK = false;
+
+ //readcmd[1] = blockNo;
+ isOK = sendCmdGetResponseWithRetries(readcmd, sizeof(readcmd), resp, 10, 10);
+ memcpy(readdata, resp, sizeof(resp));
+
+ return isOK;
+}
+
+void iClass_ReadBlk(uint8_t blockno) {
+ 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);
+}
+
+void iClass_Dump(uint8_t blockno, uint8_t numblks) {
+ 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);
+ LEDsoff();
+ BigBuf_free();
+}
+
+static bool iClass_WriteBlock_ext(uint8_t blockNo, uint8_t *data) {
+ 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[] = {0,0,0,0,0,0,0,0,0,0};
+ bool isOK = false;
+
+ isOK = sendCmdGetResponseWithRetries(write, sizeof(write), resp, sizeof(resp), 10);
+ 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);
+ }
+ }
+ }
+ return isOK;
+}
+
+void iClass_WriteBlock(uint8_t blockNo, uint8_t *data) {
+ 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);
+}
+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);
+ LEDsoff();
+}
projects / proxmark3-svn / blobdiff